NAME

Sys::Virt::Domain - Represent & manage a libvirt guest domain

DESCRIPTION

The Sys::Virt::Domain module represents a guest domain managed by the virtual machine monitor.

METHODS

my $id = $dom->get_id()

Returns an integer with a locally unique identifier for the domain.

my $uuid = $dom->get_uuid()

Returns a 16 byte long string containing the raw globally unique identifier (UUID) for the domain.

my $uuid = $dom->get_uuid_string()

Returns a printable string representation of the raw UUID, in the format 'XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX'.

my $name = $dom->get_name()

Returns a string with a locally unique name of the domain

my $hostname = $dom->get_hostname($flags=0)

Returns a string representing the hostname of the guest. $flags can be zero or more of

Sys::Virt::Domain::GET_HOSTNAME_AGENT

Report the guest agent hostname

Sys::Virt::Domain::GET_HOSTNAME_LEASE

Report the DHCP lease hostname

my $str = $dom->get_metadata($type, $uri, $flags =0)

Returns the metadata element of type $type associated with the domain. If $type is Sys::Virt::Domain::METADATA_ELEMENT then the $uri parameter specifies the XML namespace to retrieve, otherwise $uri should be undef. The optional $flags parameter defaults to zero.

$dom->set_metadata($type, $val, $key, $uri, $flags=0)

Sets the metadata element of type $type to hold the value $val. If $type is Sys::Virt::Domain::METADATA_ELEMENT then the $key and $uri elements specify an XML namespace to use, otherwise they should both be undef. The optional $flags parameter defaults to zero.

$dom->is_active()

Returns a true value if the domain is currently running

$dom->is_persistent()

Returns a true value if the domain has a persistent configuration file defined

$dom->is_updated()

Returns a true value if the domain is running and has a persistent configuration file defined that is out of date compared to the current live config.

my $xml = $dom->get_xml_description($flags=0)

Returns an XML document containing a complete description of the domain's configuration. The optional $flags parameter controls generation of the XML document, defaulting to 0 if omitted. It can be one or more of the XML DUMP constants listed later in this document.

my $type = $dom->get_os_type()

Returns a string containing the name of the OS type running within the domain.

$dom->create($flags)

Start a domain whose configuration was previously defined using the define_domain method in Sys::Virt. The $flags parameter accepts one of the DOMAIN CREATION constants documented later, and defaults to 0 if omitted.

$dom->create_with_files($fds, $flags)

Start a domain whose configuration was previously defined using the define_domain method in Sys::Virt. The $fds parameter is an array of UNIX file descriptors which will be passed to the init process of the container. This is only supported with container based virtualization.The $flags parameter accepts one of the DOMAIN CREATION constants documented later, and defaults to 0 if omitted.

$dom->undefine()

Remove the configuration associated with a domain previously defined with the define_domain method in Sys::Virt. If the domain is running, you probably want to use the shutdown or destroy methods instead.

$dom->suspend()

Temporarily stop execution of the domain, allowing later continuation by calling the resume method.

$dom->resume()

Resume execution of a domain previously halted with the suspend method.

$dom->pm_wakeup()

Wakeup the guest from power management suspend state

$dom->pm_suspend_for_duration($target, $duration, $flags=0)

Tells the guest OS to enter the power management suspend state identified by $target. The $target parameter should be one of the NODE SUSPEND CONSTANTS listed in Sys::Virt. The $duration specifies when the guest should automatically wakeup. The $flags parameter is optional and defaults to zero.

$dom->save($filename, $dxml=undef, $params=undef, $flags=0)

Take a snapshot of the domain's state and save the information to the file named in the $filename parameter. The domain can later be restored from this file with the restore_domain method on the Sys::Virt object. The optional $dxml parameter can be used to alter portions of the domain XML that will be used when performing restore. The $params parameter is a hash reference whose keys is a subset of the SAVE / RESTORE PARAMETER CONSTANTS. The $flags parameter accepts one of the SAVE / RESTORE FLAG CONSTANTS described later and defaults to zero.

$dom->managed_save($flags=0)

Take a snapshot of the domain's state and save the information to a managed save location. The domain will be automatically restored with this state when it is next started. The $flags parameter is unused and defaults to zero.

$bool = $dom->has_managed_save_image($flags=0)

Return a non-zero value if the domain has a managed save image that will be used at next start. The $flags parameter is unused and defaults to zero.

$dom->managed_save_remove($flags=0)

Remove the current managed save image, causing the guest to perform a full boot next time it is started. The $flags parameter is unused and defaults to zero.

$dom->managed_save_define_xml($xml, $flags=0)

Update the XML of the managed save image to $xml. The $flags parameter is unused and defaults to zero.

$xml = $dom->managed_save_get_xml_description($flags=0)

Get the XML in the managed save image. The $flags parameter accepts the following constants

Sys::Virt::Domain::SAVE_IMAGE_XML_SECURE

Include security sensitive information in the XML dump, such as passwords.

$dom->core_dump($filename[, $flags])

Trigger a core dump of the guest virtual machine, saving its memory image to $filename so it can be analysed by tools such as crash. The optional $flags flags parameter is currently unused and if omitted will default to 0.

$dom->core_dump_format($filename, $format, [, $flags])

Trigger a core dump of the guest virtual machine, saving its memory image to $filename so it can be analysed by tools such as crash. The $format parameter is one of the core dump format constants. The optional $flags flags parameter is currently unused and if omitted will default to 0.

Sys::Virt::Domain::CORE_DUMP_FORMAT_RAW

The raw ELF format

Sys::Virt::Domain::CORE_DUMP_FORMAT_KDUMP_ZLIB

The zlib compressed ELF format

Sys::Virt::Domain::CORE_DUMP_FORMAT_KDUMP_SNAPPY

The snappy compressed ELF format

Sys::Virt::Domain::CORE_DUMP_FORMAT_KDUMP_LZO

The lzo compressed ELF format

Sys::Virt::Domain::CORE_DUMP_FORMAT_WIN_DMP

The Windows dump format

$dom->destroy()

Immediately poweroff the machine. This is equivalent to removing the power plug. The guest OS is given no time to cleanup / save state. For a clean poweroff sequence, use the shutdown method instead.

my $info = $dom->get_info()

Returns a hash reference summarising the execution state of the domain. The elements of the hash are as follows:

maxMem

The maximum memory allowed for this domain, in kilobytes

memory

The current memory allocated to the domain in kilobytes

cpuTime

The amount of CPU time used by the domain

nrVirtCpu

The current number of virtual CPUs enabled in the domain

state

The execution state of the machine, which will be one of the constants &Sys::Virt::Domain::STATE_*.

my ($state, $reason) = $dom->get_state()

Returns an array whose values specify the current state of the guest, and the reason for it being in that state. The $state values are the same as for the get_info API, and the $reason values come from:

Sys::Virt::Domain::STATE_CRASHED_UNKNOWN

It is not known why the domain has crashed

Sys::Virt::Domain::STATE_CRASHED_PANICKED

The domain has crashed due to a kernel panic

Sys::Virt::Domain::STATE_NOSTATE_UNKNOWN

It is not known why the domain has no state

Sys::Virt::Domain::STATE_PAUSED_DUMP

The guest is paused due to a core dump operation

Sys::Virt::Domain::STATE_PAUSED_FROM_SNAPSHOT

The guest is paused due to a snapshot

Sys::Virt::Domain::STATE_PAUSED_IOERROR

The guest is paused due to an I/O error

Sys::Virt::Domain::STATE_PAUSED_MIGRATION

The guest is paused due to migration

Sys::Virt::Domain::STATE_PAUSED_SAVE

The guest is paused due to a save operation

Sys::Virt::Domain::STATE_PAUSED_UNKNOWN

It is not known why the domain has paused

Sys::Virt::Domain::STATE_PAUSED_USER

The guest is paused at admin request

Sys::Virt::Domain::STATE_PAUSED_WATCHDOG

The guest is paused due to the watchdog

Sys::Virt::Domain::STATE_PAUSED_SHUTTING_DOWN

The guest is paused while domain shutdown takes place

Sys::Virt::Domain::STATE_PAUSED_SNAPSHOT

The guest is paused while a snapshot takes place

Sys::Virt::Domain::STATE_PAUSED_CRASHED

The guest is paused due to a kernel panic

Sys::Virt::Domain::STATE_PAUSED_STARTING_UP

The guest is paused as it is being started up.

Sys::Virt::Domain::STATE_PAUSED_POSTCOPY

The guest is paused as post-copy migration is taking place

Sys::Virt::Domain::STATE_PAUSED_POSTCOPY_FAILED

The guest is paused as post-copy migration failed

Sys::Virt::Domain::STATE_PAUSED_API_ERROR

The guest is paused as a result of failed resume operation at the end of some APIs which internally suspend guests.

Sys::Virt::Domain::STATE_RUNNING_BOOTED

The guest is running after being booted

Sys::Virt::Domain::STATE_RUNNING_FROM_SNAPSHOT

The guest is running after restore from snapshot

Sys::Virt::Domain::STATE_RUNNING_MIGRATED

The guest is running after migration

Sys::Virt::Domain::STATE_RUNNING_MIGRATION_CANCELED

The guest is running after migration abort

Sys::Virt::Domain::STATE_RUNNING_RESTORED

The guest is running after restore from file

Sys::Virt::Domain::STATE_RUNNING_SAVE_CANCELED

The guest is running after save cancel

Sys::Virt::Domain::STATE_RUNNING_UNKNOWN

It is not known why the domain has started

Sys::Virt::Domain::STATE_RUNNING_UNPAUSED

The guest is running after a resume

Sys::Virt::Domain::STATE_RUNNING_WAKEUP

The guest is running after wakeup from power management suspend

Sys::Virt::Domain::STATE_RUNNING_CRASHED

The guest was restarted after crashing

Sys::Virt::Domain::STATE_RUNNING_POSTCOPY

The guest is running but post-copy is taking place

Sys::Virt::Domain::STATE_RUNNING_POSTCOPY_FAILED

The guest is running, but migration failed in post-copy

Sys::Virt::Domain::STATE_BLOCKED_UNKNOWN

The guest is blocked for an unknown reason

Sys::Virt::Domain::STATE_SHUTDOWN_UNKNOWN

It is not known why the domain has shutdown

Sys::Virt::Domain::STATE_SHUTDOWN_USER

The guest is shutdown due to admin request

Sys::Virt::Domain::STATE_SHUTOFF_CRASHED

The guest is shutoff after a crash

Sys::Virt::Domain::STATE_SHUTOFF_DESTROYED

The guest is shutoff after being destroyed

Sys::Virt::Domain::STATE_SHUTOFF_FAILED

The guest is shutoff due to a virtualization failure

Sys::Virt::Domain::STATE_SHUTOFF_FROM_SNAPSHOT

The guest is shutoff after a snapshot

Sys::Virt::Domain::STATE_SHUTOFF_MIGRATED

The guest is shutoff after migration

Sys::Virt::Domain::STATE_SHUTOFF_SAVED

The guest is shutoff after a save

Sys::Virt::Domain::STATE_SHUTOFF_SHUTDOWN

The guest is shutoff due to controlled shutdown

Sys::Virt::Domain::STATE_SHUTOFF_UNKNOWN

It is not known why the domain has shutoff

Sys::Virt::Domain::STATE_SHUTOFF_DAEMON

The daemon stopped the guest due to a failure

Sys::Virt::Domain::STATE_PMSUSPENDED_UNKNOWN

It is not known why the domain was suspended to RAM

Sys::Virt::Domain::STATE_PMSUSPENDED_DISK_UNKNOWN

It is not known why the domain was suspended to disk

my $info = $dom->get_control_info($flags=0)

Returns a hash reference providing information about the control channel. The returned keys in the hash are

state

One of the CONTROL INFO constants listed later

details

Currently unused, always 0.

stateTime

The elapsed time since the control channel entered the current state.

my $time = $dom->get_time($flags=0);

Get the current time of the guest, in seconds and nanoseconds. The $flags parameter is currently unused and defaults to zero. The return value is an array ref with two elements, the first contains the time in seconds, the second contains the remaining nanoseconds.

$dom->set_time($secs, $nsecs, $flags=0);

Set the current time of the guest, in seconds and nanoseconds. The $flags parameter accepts one of

Sys::Virt::Domain::TIME_SYNC

Re-sync domain time from domain's RTC.

$dom->set_user_password($username, $password, $flags=0);

Update the password for account $username to be $password. $password is the clear-text password string unless the PASSWORD_ENCRYPTED flag is set.

Sys::Virt::Domain::PASSWORD_ENCRYPTED

The $password is encrypted with the password scheme required by the guest OS.

$dom->rename($newname, $flags=0)

Change the name of an inactive guest to be $newname. The $flags parameter is currently unused and defaults to zero.

my @errs = $dom->get_disk_errors($flags=0)

Returns a list of all disk errors that have occurred on the backing store for the guest's virtual disks. The returned array elements are hash references, containing two keys

path

The path of the disk with an error

error

The error type

$dom->send_key($keycodeset, $holdtime, \@keycodes, $flags=0)

Sends a sequence of keycodes to the guest domain. The $keycodeset should be one of the constants listed later in the KEYCODE SET section. $holdtiem is the duration, in milliseconds, to keep the key pressed before releasing it and sending the next keycode. @keycodes is an array reference containing the list of keycodes to send to the guest. The elements in the array should be keycode values from the specified keycode set. $flags is currently unused.

my $info = $dom->get_block_info($dev, $flags=0)

Returns a hash reference summarising the disk usage of the host backing store for a guest block device. The $dev parameter should be the path to the backing store on the host. $flags is currently unused and defaults to 0 if omitted. The returned hash contains the following elements

capacity

Logical size in bytes of the block device backing image *

allocation

Highest allocated extent in bytes of the block device backing image

physical

Physical size in bytes of the container of the backing image

$dom->set_max_memory($mem)

Set the maximum memory for the domain to the value $mem. The value of the $mem parameter is specified in kilobytes.

$mem = $dom->get_max_memory()

Returns the current maximum memory allowed for this domain in kilobytes.

$dom->set_memory($mem, $flags)

Set the current memory for the domain to the value $mem. The value of the $mem parameter is specified in kilobytes. This must be less than, or equal to the domain's max memory limit. The $flags parameter can control whether the update affects the live guest, or inactive config, defaulting to modifying the current state.

$dom->set_memory_stats_period($period, $flags)

Set the period on which guests memory stats are refreshed, with $period being a value in seconds. The $flags parameter is currently unused.

$dom->shutdown()

Request that the guest OS perform a graceful shutdown and poweroff. This usually requires some form of cooperation from the guest operating system, such as responding to an ACPI signal, or a guest agent process. For an immediate, forceful poweroff, use the destroy method instead.

$dom->reboot([$flags])

Request that the guest OS perform a graceful shutdown and optionally restart. The optional $flags parameter is currently unused and if omitted defaults to zero.

$dom->reset([$flags])

Perform a hardware reset of the virtual machine. The guest OS is given no opportunity to shutdown gracefully. The optional $flags parameter is currently unused and if omitted defaults to zero.

$dom->get_max_vcpus()

Return the maximum number of vcpus that are configured for the domain

$dom->attach_device($xml[, $flags])

Hotplug a new device whose configuration is given by $xml, to the running guest. The optional <$flags> parameter defaults to 0, but can accept one of the device hotplug flags described later.

$dom->detach_device($xml[, $flags])

Hotunplug an existing device whose configuration is given by $xml, from the running guest. The optional <$flags> parameter defaults to 0, but can accept one of the device hotplug flags described later.

$dom->detach_device_alias($alias[, $flags])

Hotunplug an existing device which is identified by $alias. The optional <$flags> parameter defaults to 0, but can accept one of the device hotplug flags described later.

$dom->update_device($xml[, $flags])

Update the configuration of an existing device. The new configuration is given by $xml. The optional <$flags> parameter defaults to 0 but can accept one of the device hotplug flags described later.

$data = $dom->block_peek($path, $offset, $size[, $flags])

Peek into the guest disk $path, at byte $offset capturing $size bytes of data. The returned scalar may contain embedded NULLs. The optional $flags parameter is currently unused and if omitted defaults to zero.

$data = $dom->memory_peek($offset, $size[, $flags])

Peek into the guest memory at byte $offset virtual address, capturing $size bytes of memory. The return scalar may contain embedded NULLs. The optional $flags parameter is currently unused and if omitted defaults to zero.

$flag = $dom->get_autostart();

Return a true value if the guest domain is configured to automatically start upon boot. Return false, otherwise

$dom->set_autostart($flag)

Set the state of the autostart flag, which determines whether the guest will automatically start upon boot of the host OS

$dom->set_vcpus($count, [$flags])

Set the number of virtual CPUs in the guest VM to $count. The optional $flags parameter can be used to control whether the setting changes the live config or inactive config.

$dom->set_vcpu($cpumap, $state, [$flags])

Set the state of the CPUs in $cpumap to $state. The $flags parameter defaults to zero if not present.

$count = $dom->get_vcpus([$flags])

Get the number of virtual CPUs in the guest VM. The optional $flags parameter can be used to control whether to query the setting of the live config or inactive config.

$dom->set_guest_vcpus($cpumap, $state, [$flags=0])

Set the online status of the guest OS CPUs. The $cpumap parameter describes the set of CPUs to modify (e.g. "0-3,^1"). $state is either 1 to set the CPUs online, or 0 to set them offline. The $flags parameter is currently unused and defaults to 0.

$info $dom->get_guest_vcpus([$flags=0])

Query information about the guest OS CPUs. The returned data is a hash reference with the following keys.

vcpus

String containing bitmap representing CPU ids reported currently known to the guest.

online

String containing bitmap representing CPU ids that are currently online in the guest.

offlinable

String containing bitmap representing CPU ids that can be offlined in the guest.

The $flags parameter is currently unused and defaults to 0.

$type = $dom->get_scheduler_type()

Return the scheduler type for the guest domain

$stats = $dom->block_stats($path)

Fetch the current I/O statistics for the block device given by $path. The returned hash reference contains keys for

rd_req

Number of read requests

rd_bytes

Number of bytes read

wr_req

Number of write requests

wr_bytes

Number of bytes written

errs

Some kind of error count

my $params = $dom->get_scheduler_parameters($flags=0)

Return the set of scheduler tunable parameters for the guest, as a hash reference. The precise set of keys in the hash are specific to the hypervisor.

$dom->set_scheduler_parameters($params, $flags=0)

Update the set of scheduler tunable parameters. The value names for tunables vary, and can be discovered using the get_scheduler_params call

my $params = $dom->get_memory_parameters($flags=0)

Return a hash reference containing the set of memory tunable parameters for the guest. The keys in the hash are one of the constants MEMORY PARAMETERS described later. The $flags parameter accepts one or more the CONFIG OPTION constants documented later, and defaults to 0 if omitted.

$dom->set_memory_parameters($params, $flags=0)

Update the memory tunable parameters for the guest. The $params should be a hash reference whose keys are one of the MEMORY PARAMETERS constants. The $flags parameter accepts one or more the CONFIG OPTION constants documented later, and defaults to 0 if omitted.

my $params = $dom->get_blkio_parameters($flags=0)

Return a hash reference containing the set of blkio tunable parameters for the guest. The keys in the hash are one of the constants BLKIO PARAMETERS described later. The $flags parameter accepts one or more the CONFIG OPTION constants documented later, and defaults to 0 if omitted.

$dom->set_blkio_parameters($params, $flags=0)

Update the blkio tunable parameters for the guest. The $params should be a hash reference whose keys are one of the BLKIO PARAMETERS constants. The $flags parameter accepts one or more the CONFIG OPTION constants documented later, and defaults to 0 if omitted.

$stats = $dom->get_block_iotune($disk, $flags=0)

Return a hash reference containing the set of blkio tunable parameters for the guest disk $disk. The keys in the hash are one of the constants BLOCK IOTUNE PARAMETERS described later.

$dom->set_block_iotune($disk, $params, $flags=0);

Update the blkio tunable parameters for the guest disk $disk. The $params should be a hash reference whose keys are one of the BLOCK IOTUNE PARAMETERS constants.

my $params = $dom->get_interface_parameters($intf, $flags=0)

Return a hash reference containing the set of interface tunable parameters for the guest. The keys in the hash are one of the constants INTERFACE PARAMETERS described later.

$dom->set_interface_parameters($intf, $params, $flags=0)

Update the interface tunable parameters for the guest. The $params should be a hash reference whose keys are one of the INTERFACE PARAMETERS constants.

my $params = $dom->get_numa_parameters($flags=0)

Return a hash reference containing the set of numa tunable parameters for the guest. The keys in the hash are one of the constants NUMA PARAMETERS described later. The $flags parameter accepts one or more the CONFIG OPTION constants documented later, and defaults to 0 if omitted.

$dom->set_numa_parameters($params, $flags=0)

Update the numa tunable parameters for the guest. The $params should be a hash reference whose keys are one of the NUMA PARAMETERS constants. The $flags parameter accepts one or more the CONFIG OPTION constants documented later, and defaults to 0 if omitted.

my $params = $dom->get_perf_events($flags=0)

Return a hash reference containing the set of performance events that are available for the guest. The keys in the hash are one of the constants PERF EVENTS described later. The $flags parameter accepts one or more the CONFIG OPTION constants documented later, and defaults to 0 if omitted.

$dom->set_perf_events($params, $flags=0)

Update the enabled state for performance events for the guest. The $params should be a hash reference whose keys are one of the PERF EVENTS constants. The $flags parameter accepts one or more the CONFIG OPTION constants documented later, and defaults to 0 if omitted.

$dom->block_resize($disk, $newsize, $flags=0)

Resize the disk $disk to have new size $newsize KB. If the disk is backed by a special image format, the actual resize is done by the hypervisor. If the disk is backed by a raw file, or block device, the resize must be done prior to invoking this API call, and it merely updates the hypervisor's view of the disk size. The following flags may be used

Sys::Virt::Domain::BLOCK_RESIZE_BYTES

Treat $newsize as if it were in bytes, rather than KB.

Sys::Virt::Domain::BLOCK_RESIZE_CAPACITY

Resize to full the capacity of the source

$dom->interface_stats($path)

Fetch the current I/O statistics for the block device given by $path. The returned hash contains keys for

rx_bytes

Total bytes received

rx_packets

Total packets received

rx_errs

Total packets received with errors

rx_drop

Total packets drop at reception

tx_bytes

Total bytes transmitted

tx_packets

Total packets transmitted

tx_errs

Total packets transmitted with errors

tx_drop

Total packets dropped at transmission.

$dom->memory_stats($flags=0)

Fetch the current memory statistics for the guest domain. The $flags parameter is currently unused and can be omitted. The returned hash contains keys for

swap_in

Data read from swap space

swap_out

Data written to swap space

major_fault

Page fault involving disk I/O

minor_fault

Page fault not involving disk I/O

unused

Memory not used by the system

available

Total memory seen by guest

rss

Resident set size. Size of memory resident in host RAM.

$info = $dom->get_security_label()

Fetch information about the security label assigned to the guest domain. The returned hash reference has two keys, model gives the name of the security model in effect (e.g. selinux), while label provides the name of the security label applied to the domain. This method only returns information about the first security label. To retrieve all labels, use get_security_label_list.

@info = $dom->get_security_label_list()

Fetches information about all security labels assigned to the guest domain. The elements in the returned array are all hash references, whose keys are as described for get_security_label.

$ddom = $dom->migrate(destcon, \%params, flags=0)

Migrate a domain to an alternative host. The destcon parameter should be a Sys::Virt connection to the remote target host. The flags parameter takes one or more of the Sys::Virt::Domain::MIGRATE_XXX constants described later in this document. The %params parameter is a hash reference used to set various parameters for the migration operation, with the following valid keys.

Sys::Virt::Domain::MIGRATE_PARAM_URI

The URI to use for initializing the domain migration. It takes a hypervisor specific format. The uri_transports element of the hypervisor capabilities XML includes details of the supported URI schemes. When omitted libvirt will auto-generate suitable default URI. It is typically only necessary to specify this URI if the destination host has multiple interfaces and a specific interface is required to transmit migration data.

Sys::Virt::Domain::MIGRATE_PARAM_DEST_NAME

The name to be used for the domain on the destination host. Omitting this parameter keeps the domain name the same. This field is only allowed to be used with hypervisors that support domain renaming during migration.

Sys::Virt::Domain::MIGRATE_PARAM_DEST_XML

The new configuration to be used for the domain on the destination host. The configuration must include an identical set of virtual devices, to ensure a stable guest ABI across migration. Only parameters related to host side configuration can be changed in the XML. Hypervisors which support this field will forbid migration if the provided XML would cause a change in the guest ABI. This field cannot be used to rename the domain during migration (use VIR_MIGRATE_PARAM_DEST_NAME field for that purpose). Domain name in the destination XML must match the original domain name.

Omitting this parameter keeps the original domain configuration. Using this field with hypervisors that do not support changing domain configuration during migration will result in a failure.

Sys::Virt::Domain::MIGRATE_PARAM_GRAPHICS_URI

URI to use for migrating client's connection to domain's graphical console as VIR_TYPED_PARAM_STRING. If specified, the client will be asked to automatically reconnect using these parameters instead of the automatically computed ones. This can be useful if, e.g., the client does not have a direct access to the network virtualization hosts are connected to and needs to connect through a proxy. The URI is formed as follows:

protocol://hostname[:port]/[?parameters]

where protocol is either "spice" or "vnc" and parameters is a list of protocol specific parameters separated by '&'. Currently recognized parameters are "tlsPort" and "tlsSubject". For example,

spice://target.host.com:1234/?tlsPort=4567

Sys::Virt::Domain::MIGRATE_PARAM_BANDWIDTH

The maximum bandwidth (in MiB/s) that will be used for migration. If set to 0 or omitted, libvirt will choose a suitable default. Some hypervisors do not support this feature and will return an error if this field is used and is not 0.

Sys::Virt::Domain::MIGRATE_PARAM_BANDWIDTH_POSTCOPY

The maximum bandwidth (in MiB/s) that will be used for migration during post-copy phase. If set to 0 or omitted, libvirt will choose a suitable default. Some hypervisors do not support this feature and return an error if this field is used and is not 0.

Sys::Virt::Domain::MIGRATE_PARAM_LISTEN_ADDRESS

The address on which to listen for incoming migration connections. If omitted, libvirt will listen on the wildcard address (0.0.0.0 or ::). This default may be a security risk if guests, or other untrusted users have the ability to connect to the virtualization host, thus use of an explicit restricted listen address is recommended.

Sys::Virt::Domain::MIGRATE_PARAM_DISK_PORT

Port that destination server should use for incoming disks migration. Type is VIR_TYPED_PARAM_INT. If set to 0 or omitted, libvirt will choose a suitable default. At the moment this is only supported by the QEMU driver.

Sys::Virt::Domain::MIGRATE_PARAM_MIGRATE_DISKS

The list of disks to migrate when doing block storage migration. In contrast to other parameters whose values are plain strings, the parameter value should be an array reference, whose elements are in turn strings representing the disk target names.

Sys::Virt::Domain::MIGRATE_PARAM_COMPRESSION

The type of compression method use use, either xbzrle or mt.

Sys::Virt::Domain::MIGRATE_PARAM_COMPRESSION_MT_THREADS

The number of compression threads to use

Sys::Virt::Domain::MIGRATE_PARAM_COMPRESSION_MT_DTHREADS

The number of decompression threads

Sys::Virt::Domain::MIGRATE_PARAM_COMPRESSION_MT_LEVEL

The compression level from 0 (no compression) to 9 (maximum compression)

Sys::Virt::Domain::MIGRATE_PARAM_COMPRESSION_XBZRLE_CACHE

The size of the cache for xbzrle compression

Sys::Virt::Domain::MIGRATE_PARAM_PERSIST_XML

The alternative persistent XML config to copy

Sys::Virt::Domain::MIGRATE_PARAM_AUTO_CONVERGE_INITIAL

The initial percentage to throttle guest vCPUs

Sys::Virt::Domain::MIGRATE_PARAM_AUTO_CONVERGE_INCREMENT

The additional percentage step size to throttle guest vCPUs if progress is not made

Sys::Virt::Domain::MIGRATE_PARAM_PARALLEL_CONNECTIONS

The number of connections used during parallel migration.

Sys::Virt::Domain::MIGRATE_PARAM_TLS_DESTINATION

Override the destination host name used for TLS verification. Normally the TLS certificate from the destination host must match the host's name for TLS verification to succeed. When the certificate does not match the destination hostname and the expected certificate's hostname is known, this parameter can be used to pass this expected hostname when starting the migration.

Sys::Virt::Domain::MIGRATE_PARAM_DISKS_URI

The URI to use for initializing the domain migration for storage. It takes a hypervisor specific format. The uri_transports element of the hypervisor capabilities XML includes details of the supported URI schemes. When omitted libvirt will auto-generate suitable default URI. It is typically only necessary to specify this URI if the destination host has multiple interfaces and a specific interface is required to transmit storage data.

Sys::Virt::Domain::MIGRATE_PARAM_ZLIB_LEVEL

The level of compression for zlib. Accepted values are in range 0-9. 0 is no compression, 1 is maximum speed and 9 is maximum compression.

Sys::Virt::Domain::MIGRATE_PARAM_ZSTD_LEVEL

The level of compression for zstd. Accepted values are in range 0-20. 0 is no compression, 1 is maximum speed and 20 is maximum compression.

$ddom = $dom->migrate(destcon, flags=0, dname=undef, uri=undef, bandwidth=0)

Migrate a domain to an alternative host. Use of positional parameters with migrate is deprecated in favour of passing a hash reference as described above.

$ddom = $dom->migrate2(destcon, dxml, flags, dname, uri, bandwidth)

Migrate a domain to an alternative host. This method is deprecated in favour of passing a hash ref to migrate.

$ddom = $dom->migrate_to_uri(desturi, \%params, flags=0)

Migrate a domain to an alternative host. The desturi parameter should be a valid libvirt connection URI for the remote target host. The flags parameter takes one or more of the Sys::Virt::Domain::MIGRATE_XXX constants described later in this document. The %params parameter is a hash reference used to set various parameters for the migration operation, with the same keys described for the migrate API.

$dom->migrate_to_uri(desturi, flags, dname, bandwidth)

Migrate a domain to an alternative host. Use of positional parameters with migrate_to_uri is deprecated in favour of passing a hash reference as described above.

$dom->migrate_to_uri2(dconnuri, miguri, dxml, flags, dname, bandwidth)

Migrate a domain to an alternative host. This method is deprecated in favour of passing a hash ref to migrate_to_uri.

$dom->migrate_set_max_downtime($downtime, $flags=0)

Set the maximum allowed downtime during migration of the guest. A longer downtime makes it more likely that migration will complete, at the cost of longer time blackout for the guest OS at the switch over point. The downtime parameter is measured in milliseconds. The $flags parameter is currently unused and defaults to zero.

$downtime = $dom->migrate_get_max_downtime($flags=0)

Get the current value of the maximum downtime allowed during a migration of a guest. The returned <downtime> value is measured in milliseconds. The $flags parameter is currently unused and defaults to zero.

$dom->migrate_set_max_speed($bandwidth, $flags=0)

Set the maximum allowed bandwidth during migration of the guest. The bandwidth parameter is measured in MB/second. The $flags parameter takes zero or more of the constants:

$Sys::Virt::Domain::MIGRATE_MAX_SPEED_POSTCOPY

Set the post-copy speed instead of the pre-copy speed.

$bandwidth = $dom->migrate_get_max_speed($flags=0)

Get the maximum allowed bandwidth during migration of the guest. The returned <bandwidth> value is measured in MB/second. The $flags parameter is accepts the same constants as migrate_set_max_speed.

$dom->migrate_set_compression_cache($cacheSize, $flags=0)

Set the maximum allowed compression cache size during migration of the guest. The cacheSize parameter is measured in bytes. The $flags parameter is currently unused and defaults to zero.

$cacheSize = $dom->migrate_get_compression_cache($flags=0)

Get the maximum allowed compression cache size during migration of the guest. The returned <bandwidth> value is measured in bytes. The $flags parameter is currently unused and defaults to zero.

$dom->migrate_start_post_copy($flags=0)

Switch the domain from pre-copy to post-copy mode. This requires that the original migrate command had the Sys::Virt::Domain::MIGRATE_POST_COPY flag specified.

$dom->inject_nmi($flags)

Trigger an NMI in the guest virtual machine. The $flags parameter is currently unused and defaults to 0.

$dom->open_console($st, $devname, $flags)

Open the text console for a serial, parallel or paravirt console device identified by $devname, connecting it to the stream $st. If $devname is undefined, the default console will be opened. $st must be a Sys::Virt::Stream object used for bi-directional communication with the console. $flags is currently unused, defaulting to 0.

$dom->open_channel($st, $devname, $flags)

Open the text console for a data channel device identified by $devname, connecting it to the stream $st. $st must be a Sys::Virt::Stream object used for bi-directional communication with the channel. $flags is currently unused, defaulting to 0.

$dom->open_graphics($idx, $fd, $flags)

Open the graphics console for a guest, identified by $idx, counting from 0. The $fd should be a file descriptor for an anonymous socket pair. The $flags argument should be one of the constants listed at the end of this document, and defaults to 0.

$fd = $dom->open_graphics_fd($idx, $flags)

Open the graphics console for a guest, identified by $idx, counting from 0. The $flags argument should be one of the constants listed at the end of this document, and defaults to 0. The return value will be a file descriptor connected to the console which must be closed when no longer needed. This method is preferred over open_graphics since it will work correctly under sVirt mandatory access control policies.

my $mimetype = $dom->screenshot($st, $screen, $flags)

Capture a screenshot of the virtual machine's monitor. The $screen parameter controls which monitor is captured when using a multi-head or multi-card configuration. $st must be a Sys::Virt::Stream object from which the data can be read. $flags is currently unused and defaults to 0. The mimetype of the screenshot is returned

@vcpuinfo = $dom->get_vcpu_info($flags=0)

Obtain information about the state of all virtual CPUs in a running guest domain. The returned list will have one element for each vCPU, where each elements contains a hash reference. The keys in the hash are, number the vCPU number, cpu the physical CPU on which the vCPU is currently scheduled, cpuTime the cumulative execution time of the vCPU, state the running state and affinity giving the allowed scheduler placement. The value for affinity is a string representing a bitmask against physical CPUs, 8 cpus per character. To extract the bits use the unpack function with the b* template. NB The state, cpuTime, cpu values are only available if using $flags value of 0, and the domain is currently running; otherwise they will all be set to zero.

$dom->pin_vcpu($vcpu, $mask)

Pin the virtual CPU given by index $vcpu to physical CPUs given by $mask. The $mask is a string representing a bitmask against physical CPUs, 8 cpus per character.

$mask = $dom->get_emulator_pin_info()

Obtain information about the CPU affinity of the emulator process. The returned $mask is a bitstring against physical CPUs, 8 cpus per character. To extract the bits use the unpack function with the b* template.

$dom->pin_emulator($newmask, $flags=0)

Pin the emulator threads to the physical CPUs identified by the affinity in $newmask. The $newmask is a bitstring against the physical CPUa, 8 cpus per character. To create a suitable bitstring, use the vec function with a value of 1 for the BITS parameter.

@iothreadinfo = $dom->get_iothread_info($flags=0)

Obtain information about the state of all IOThreads in a running guest domain. The returned list will have one element for each IOThread, where each elements contains a hash reference. The keys in the hash are, number the IOThread number and affinity giving the allowed scheduler placement. The value for affinity is a string representing a bitmask against physical CPUs, 8 cpus per character. To extract the bits use the unpack function with the b* template.

$dom->pin_iothread($iothread, $mask)

Pin the IOThread given by index $iothread to physical CPUs given by $mask. The $mask is a string representing a bitmask against physical CPUs, 8 cpus per character.

$dom->add_iothread($iothread, $flags=0)

Add a new IOThread by the $iothread value to the guest domain. The $flags parameter accepts one or more the CONFIG OPTION constants documented later, and defaults to 0 if omitted.

$dom->del_iothread($iothread, $flags=0)

Delete an existing IOThread by the $iothread value from the guest domain. The $flags parameter accepts one or more the CONFIG OPTION constants documented later, and defaults to 0 if omitted.

$dom->set_iothread($iothread, $params, $flags=0)

Set parameters for the IOThread by the $iothread value on the guest domain. The $params parameter is a hash reference whose keys are the IOTHREAD STATS constants documented later. The $flags parameter accepts one or more the CONFIG OPTION constants documented later, and defaults to 0 if omitted.

my @stats = $dom->get_cpu_stats($startCpu, $numCpus, $flags=0)

Requests the guests host physical CPU usage statistics, starting from host CPU <$startCpu> counting up to $numCpus. If $startCpu is -1 and $numCpus is 1, then the utilization across all CPUs is returned. Returns an array of hash references, each element containing stats for one CPU.

my $info = $dom->get_job_info()

Returns a hash reference summarising the execution state of the background job. The elements of the hash are as follows:

type

The type of job, one of the JOB TYPE constants listed later in this document.

timeElapsed

The elapsed time in milliseconds

timeRemaining

The expected remaining time in milliseconds. Only set if the type is JOB_UNBOUNDED.

dataTotal

The total amount of data expected to be processed by the job, in bytes.

dataProcessed

The current amount of data processed by the job, in bytes.

dataRemaining

The expected amount of data remaining to be processed by the job, in bytes.

memTotal

The total amount of memory expected to be processed by the job, in bytes.

memProcessed

The current amount of memory processed by the job, in bytes.

memRemaining

The expected amount of memory remaining to be processed by the job, in bytes.

fileTotal

The total amount of file expected to be processed by the job, in bytes.

fileProcessed

The current amount of file processed by the job, in bytes.

fileRemaining

The expected amount of file remaining to be processed by the job, in bytes.

my ($type, $stats) = $dom->get_job_stats($flags=0)

Returns an array summarising the execution state of the background job. The $type value is one of the JOB TYPE constants listed later in this document. The $stats value is a hash reference, whose elements are one of the following constants.

type

The type of job, one of the JOB TYPE constants listed later in this document.

The $flags parameter defaults to zero and can take one of the following constants.

Sys::Virt::Domain::JOB_STATS_COMPLETED

Return the stats of the most recently completed job.

Sys::Virt::Domain::JOB_STATS_KEEP_COMPLETED

Don't clear the completed stats after reading them.

Sys::Virt::Domain::JOB_TIME_ELAPSED

The elapsed time in milliseconds

Sys::Virt::Domain::JOB_TIME_ELAPSED_NET

Time in milliseconds since the beginning of the migration job NOT including the time required to transfer control flow from the source host to the destination host.

Sys::Virt::Domain::JOB_TIME_REMAINING

The expected remaining time in milliseconds. Only set if the type is JOB_UNBOUNDED.

Sys::Virt::Domain::JOB_DATA_TOTAL

The total amount of data expected to be processed by the job, in bytes.

Sys::Virt::Domain::JOB_DATA_PROCESSED

The current amount of data processed by the job, in bytes.

Sys::Virt::Domain::JOB_DATA_REMAINING

The expected amount of data remaining to be processed by the job, in bytes.

Sys::Virt::Domain::JOB_MEMORY_TOTAL

The total amount of memory expected to be processed by the job, in bytes.

Sys::Virt::Domain::JOB_MEMORY_PROCESSED

The current amount of memory processed by the job, in bytes.

Sys::Virt::Domain::JOB_MEMORY_REMAINING

The expected amount of memory remaining to be processed by the job, in bytes.

Sys::Virt::Domain::JOB_MEMORY_CONSTANT

The number of pages filled with a constant byte which have been transferred

Sys::Virt::Domain::JOB_MEMORY_NORMAL

The number of pages transferred without any compression

Sys::Virt::Domain::JOB_MEMORY_NORMAL_BYTES

The number of bytes transferred without any compression

Sys::Virt::Domain::JOB_MEMORY_BPS

The bytes per second transferred

Sys::Virt::Domain::JOB_MEMORY_DIRTY_RATE

The number of memory pages dirtied per second

Sys::Virt::Domain::JOB_MEMORY_PAGE_SIZE

The memory page size in bytes

Sys::Virt::Domain::JOB_MEMORY_ITERATION

The total number of iterations over guest memory

Sys::Virt::Domain::JOB_MEMORY_POSTCOPY_REQS

The number of page requests received from the destination host during post-copy migration.

Sys::Virt::Domain::JOB_DISK_TOTAL

The total amount of file expected to be processed by the job, in bytes.

Sys::Virt::Domain::JOB_DISK_PROCESSED

The current amount of file processed by the job, in bytes.

Sys::Virt::Domain::JOB_DISK_REMAINING

The expected amount of file remaining to be processed by the job, in bytes.

Sys::Virt::Domain::JOB_DISK_BPS

The bytes per second transferred

Sys::Virt::Domain::JOB_AUTO_CONVERGE_THROTTLE

The percentage by which vCPUs are currently throttled

Sys::Virt::Domain::JOB_COMPRESSION_CACHE

The size of the compression cache in bytes

Sys::Virt::Domain::JOB_COMPRESSION_BYTES

The number of compressed bytes transferred

Sys::Virt::Domain::JOB_COMPRESSION_PAGES

The number of compressed pages transferred

Sys::Virt::Domain::JOB_COMPRESSION_CACHE_MISSES

The number of changing pages not in compression cache

Sys::Virt::Domain::JOB_COMPRESSION_OVERFLOW

The number of changing pages in the compression cache but sent uncompressed since the compressed page was larger than the non-compressed page.

Sys::Virt::Domain::JOB_DOWNTIME

The number of milliseconds of downtime expected during migration switchover.

Sys::Virt::Domain::JOB_DOWNTIME_NET

Real measured downtime (ms) NOT including the time required to transfer control flow from the source host to the destination host.

Sys::Virt::Domain::JOB_SETUP_TIME

The number of milliseconds of time doing setup of the job

Sys::Virt::Domain::JOB_OPERATION

The type of operation associated with the job

Sys::Virt::Domain::JOB_SUCCESS

Whether the job was successfully completed.

Sys::Virt::Domain::JOB_DISK_TEMP_TOTAL

Possible total temporary disk space for the job in bytes

Sys::Virt::Domain::JOB_DISK_TEMP_USED

Current total temporary disk space for the job in bytes

Sys::Virt::Domain::JOB_ERRMSG

The error message from a failed job

The values for the Sys::Virt::Domain::JOB_OPERATION field are

Sys::Virt::Domain::JOB_OPERATION_UNKNOWN

No known job type

Sys::Virt::Domain::JOB_OPERATION_START

The guest is starting

Sys::Virt::Domain::JOB_OPERATION_SAVE

The guest is saving to disk

Sys::Virt::Domain::JOB_OPERATION_RESTORE

The guest is restoring from disk

Sys::Virt::Domain::JOB_OPERATION_MIGRATION_IN

The guest is migrating in from another host

Sys::Virt::Domain::JOB_OPERATION_MIGRATION_OUT

The guest is migrating out to another host

Sys::Virt::Domain::JOB_OPERATION_SNAPSHOT

The guest is saving a snapshot

Sys::Virt::Domain::JOB_OPERATION_SNAPSHOT_REVERT

The guest is reverting to a snapshot

Sys::Virt::Domain::JOB_OPERATION_DUMP

The guest is saving a crash dump

Sys::Virt::Domain::JOB_OPERATION_BACKUP

The guest is performing a block backup

Sys::Virt::Domain::JOB_OPERATION_SNAPSHOT_DELETE

The guest is deleting a snapshot

$dom->abort_job($flags=0)

Aborts the currently executing job. Valid $flags include:

Sys::Virt::Domain::DOMAIN_ABORT_JOB_POSTCOPY

Interrupt post-copy migration. It can later be resumed using migrate APIs with MIGRATE_POSTCOPY_RESUME flag.

my $info = $dom->get_block_job_info($path, $flags=0)

Returns a hash reference summarising the execution state of the block job. The $path parameter should be the fully qualified path of the block device being changed. Valid $flags include:

Sys::Virt::Domain::BLOCK_JOB_INFO_BANDWIDTH_BYTES

Treat bandwidth value as bytes instead of MiB.

$dom->set_block_job_speed($path, $bandwidth, $flags=0)

Change the maximum I/O bandwidth used by the block job that is currently executing for $path. The $bandwidth argument is specified in MB/s. The $flags parameter can take the bitwise union of the values:

Sys::Virt::Domain::BLOCK_JOB_SPEED_BANDWIDTH_BYTES

The $bandwidth parameter value is measured in bytes/s instead of MB/s.

$dom->abort_block_job($path, $flags=0)

Abort the current job that is executing for the block device associated with $path

$dom->block_pull($path, $bandwidth, $flags=0)

Merge the backing files associated with $path into the top level file. The $bandwidth parameter specifies the maximum I/O rate to allow in MB/s. The $flags parameter can take the bitwise union of the values:

Sys::Virt::Domain::BLOCK_PULL_BANDWIDTH_BYTES

The $bandwidth parameter value is measured in bytes/s instead of MB/s.

$dom->block_rebase($path, $base, $bandwidth, $flags=0)

Switch the backing path associated with $path to instead use $base. The $bandwidth parameter specifies the maximum I/O rate to allow in MB/s. The $flags parameter can take the bitwise union of the values:

Sys::Virt::Domain::BLOCK_REBASE_BANDWIDTH_BYTES

The $bandwidth parameter value is measured in bytes/s instead of MB/s.

$dom->block_copy($path, $destxml, $params, $flags=0)

Copy contents of a disk image <$path> into the target volume described by $destxml which follows the schema of the <disk> element in the domain XML. The $params parameter is a hash of optional parameters to control the process

Sys::Virt::Domain::BLOCK_COPY_BANDWIDTH

The maximum bandwidth in bytes per second.

Sys::Virt::Domain::BLOCK_COPY_GRANULARITY

The granularity in bytes of the copy process

Sys::Virt::Domain::BLOCK_COPY_BUF_SIZE

The maximum amount of data in flight in bytes.

$dom->block_commit($path, $base, $top, $bandwidth, $flags=0)

Commit changes there were made to the temporary top level file $top. Takes all the differences between $top and $base and merge them into $base. The $bandwidth parameter specifies the maximum I/O rate to allow in MB/s. The $flags parameter can take the bitwise union of the values:

Sys::Virt::Domain::BLOCK_COMMIT_BANDWIDTH_BYTES

The $bandwidth parameter value is measured in bytes instead of MB/s.

$count = $dom->num_of_snapshots()

Return the number of saved snapshots of the domain

@names = $dom->list_snapshot_names()

List the names of all saved snapshots. The names can be used with the lookup_snapshot_by_name

@snapshots = $dom->list_snapshots()

Return a list of all snapshots currently known to the domain. The elements in the returned list are instances of the Sys::Virt::DomainSnapshot class. This method requires O(n) RPC calls, so the list_all_snapshots method is recommended as a more efficient alternative.

my @snapshots = $dom->list_all_snapshots($flags)

Return a list of all domain snapshots associated with this domain. The elements in the returned list are instances of the Sys::Virt::DomainSnapshot class. The $flags parameter can be used to filter the list of return domain snapshots.

my $snapshot = $dom->get_snapshot_by_name($name)

Return the domain snapshot with a name of $name. The returned object is an instance of the Sys::Virt::DomainSnapshot class.

$dom->has_current_snapshot()

Returns a true value if the domain has a currently active snapshot

$snapshot = $dom->current_snapshot()

Returns the currently active snapshot for the domain.

$snapshot = $dom->create_snapshot($xml[, $flags])

Create a new snapshot from the $xml. The $flags parameter accepts the SNAPSHOT CREATION constants listed in Sys::Virt::DomainSnapshots.

my @checkpoints = $dom->list_all_checkpoints($flags)

Return a list of all domain checkpoints associated with this domain. The elements in the returned list are instances of the Sys::Virt::DomainCheckpoint class. The $flags parameter can be used to filter the list of return domain checkpoints.

my $checkpoint = $dom->get_checkpoint_by_name($name)

Return the domain checkpoint with a name of $name. The returned object is an instance of the Sys::Virt::DomainCheckpoint class.

$checkpoint = $dom->create_checkpoint($xml[, $flags])

Create a new checkpoint from the $xml. The $flags parameter accepts the CHECKPOINT CREATION constants listed in Sys::Virt::DomainCheckpoints.

$dom->backup_begin($backupxml, $checkpointxml=undef, $flags=0);

Start a point-in-time backup job for the specified disks of a running domain. The $backupxml parameter describes the backup operation, including which disks to use. The optional $checkpointxml parameter can be used to create a checkpoint covering to the same point in time as the backup. The optional $flags parameter can be one of the following constants:

Sys::Virt::Domain::BACKUP_BEGIN_REUSE_EXTERNAL

Assume that the output/temporary files for the backup have been precreated by the caller with the correct size and format.

$xml = $dom->backup_get_xml_description($flags=0);

Get the XML description of the currently executing backup job. If there is no backup job then an error is raised.

$dom->fs_trim($mountPoint, $minimum, $flags=0);

Issue an FS_TRIM command to the device at $mountPoint to remove chunks of unused space that are at least $minimum bytes in length. $flags is currently unused and defaults to zero.

$dom->fs_freeze(\@mountPoints, $flags=0);

Freeze all the filesystems associated with the @mountPoints array reference. If <@mountPoints> is an empty list, then all filesystems will be frozen. $flags is currently unused and defaults to zero.

$dom->fs_thaw(\@mountPoints, $flags=0);

Thaw all the filesystems associated with the @mountPoints array reference. If <@mountPoints> is an empty list, then all filesystems will be thawed. $flags is currently unused and defaults to zero.

@fslist = $dom->get_fs_info($flags=0);

Obtain a list of all guest filesystems. The returned list will contain one element for each filesystem, whose value will be a hash reference with the following keys

name

The name of the guest device that is mounted

fstype

The filesystem type (e.g. 'ext4', 'fat', 'ntfs', etc)

mountpoint

The location in the filesystem tree of the mount

devalias

An array reference containing list of device aliases associated with the guest device. The device aliases correspond to disk target names in the guest XML configuration

@nics = $dom->get_interface_addresses($src, $flags=0);

Obtain a list of all guest network interfaces. The $src parameter is one of the constants

Sys::Virt::Domain::INTERFACE_ADDRESSES_SRC_LEASE

Extract the DHCP server lease information

Sys::Virt::Domain::INTERFACE_ADDRESSES_SRC_AGENT

Query the guest OS via an agent

Sys::Virt::Domain::INTERFACE_ADDRESSES_SRC_ARP

Extract from the local ARP tables

The returned list will contain one element for each interface. The values in the list will be a hash reference with the following keys

name

The name of the guest interface that is mounted

hwaddr

The hardware address, aka MAC, if available.

addrs

An array reference containing list of IP addresses associated with the guest NIC. Each element in the array is a further hash containing

addr

The IP address string

prefix

The IP address network prefix

type

The IP address type (IPv4 vs IPv6)

$dom->send_process_signal($pid, $signum, $flags=0);

Send the process $pid the signal $signum. The $signum value must be one of the constants listed later, not a POSIX or Linux signal value. $flags is currently unused and defaults to zero.

$dom->set_block_threshold($dev, $threshold, $flags=0);

Set the threshold level for delivering the EVENT_ID_BLOCK_THRESHOLD if the device or backing chain element described by $dev is written beyond the set $threshold level. The threshold level is unset once the event fires. The event might not be delivered at all if libvirtd was not running at the moment when the threshold was reached.

$dom->set_lifecycle_action($type, $action, $flags=0)

Changes the actions of lifecycle events for domain represented as <on_$type>$action</on_$type> in the domain XML.

$info = $dom->get_launch_security_info($flags=0)

Get information about the domain launch security policy. $flags is currently unused and defaults to zero. The returned hash may contain the following keys

Sys::Virt::Domain::LAUNCH_SECURITY_SEV_MEASUREMENT

The AMD SEV launch measurement

Sys::Virt::Domain::LAUNCH_SECURITY_SEV_API_MAJOR

The host SEV API major version

Sys::Virt::Domain::LAUNCH_SECURITY_SEV_API_MINOR

The host SEV API minor version

Sys::Virt::Domain::LAUNCH_SECURITY_SEV_BUILD_ID

The host SEV firmware build ID

Sys::Virt::Domain::LAUNCH_SECURITY_SEV_POLICY

The guest SEV policy

Sys::Virt::Domain::LAUNCH_SECURITY_SEV_SNP_POLICY

The guest SEV-SNP policy

$dom->set_launch_security_state(\%params, $flags=0)

Set information about the domain launch security state. $flags is currently unused and defaults to zero. The provided hash may contain the following keys

Sys::Virt::Domain::LAUNCH_SECURITY_SEV_SECRET

The SEV secret string to inject

Sys::Virt::Domain::LAUNCH_SECURITY_SEV_SECRET_HEADER

The SEV secret header string to inject

Sys::Virt::Domain::LAUNCH_SECURITY_SEV_SECRET_SET_ADDRESS

The address at which to inject the SEV secret. If omitted it can be automatically determined from the firmware

$info = $dom->get_guest_info($types, $flags=0)

Get information about the domain guest configuration. The $types parameter determines what pieces of information are returned and should be the bitwise or of the following constants:

Sys::Virt::Domain::GUEST_INFO_USERS

Active user information

Sys::Virt::Domain::GUEST_INFO_OS

Misc operating system information

Sys::Virt::Domain::GUEST_INFO_TIMEZONE

The guest timezone

Sys::Virt::Domain::GUEST_INFO_HOSTNAME

The guest hostname

Sys::Virt::Domain::GUEST_INFO_FILESYSTEM

Filesystem mount information

Sys::Virt::Domain::GUEST_INFO_DISKS

Block device information

Sys::Virt::Domain::GUEST_INFO_INTERFACES

Network interfaces information

$flags is currently unused and defaults to zero.

$dom->set_agent_response_timeout($timeout, $flags=0)

Set the amount of time to wait for the agent to respond to a command. $timeout is a positive integer representing the number of seconds to wait, or one of the constants:

Sys::Virt::Domain::AGENT_RESPONSE_TIMEOUT_BLOCK

Wait forever with no timeout

Sys::Virt::Domain::AGENT_RESPONSE_TIMEOUT_NOWAIT

Don't want at all, return immediately

Sys::Virt::Domain::AGENT_RESPONSE_TIMEOUT_DEFAULT

Use the hypervisor driver's default timeout

The $flags parameter is currently unused and defaults to zero.

my @keys = $dom->authorized_ssh_keys_get($user, $flags=0)

Retrieve the list of authorized SSH keys for the user account $user. The $flags parameter is currently unused and defaults to zero.

$dom->authorized_ssh_keys_set($user, \@keys, $flags=0)

Update the list of authorized SSH keys for the user account $user. The @keys parameter should be an array reference containing the new keys, if any. The default behaviour is to set the authorized SSH keys to the exact set specified in @keys. This can be modified via the $flags parameter which takes the following constants

Sys::Virt::Domain::AUTHORIZED_SSH_KEYS_SET_APPEND

Append @keys to the current set of keys, rather than replacing the existing keys.

Sys::Virt::Domain::AUTHORIZED_SSH_KEYS_SET_REMOVE

Remove @keys from the current set of keys, rather than replacing the existing keys. It is not an error if the keys do not exist.

my @msgs = $dom->get_messages($flags=0)

Retrieve a list of messages associated with the domain. The optional $flags parameter can accept zero or more of

Sys::Virt::Domain::MESSAGE_DEPRECATION

Warnings about use of deprecated features

Sys::Virt::Domain::MESSAGE_TAINTING

Warnings about actions that have tainting the domain

$dom->start_dirty_rate_calc($dom, $secs, $flags=0)

Request calculation of the domain's memory dirty rate over the next $secs seconds. $flags accepts one or more of

Sys::Virt::Domain::DIRTYRATE_MODE_PAGE_SAMPLING

Page sampling mode

Sys::Virt::Domain::DIRTYRATE_MODE_DIRTY_BITMAP

Dirty bitmap mode

Sys::Virt::Domain::DIRTYRATE_MODE_DIRTY_RING

Dirty ring mode

$dom->fd_associate($name, \@fds, $flags=0)

Associate a set of file descriptors in @fds with the domain, giving them the name $name. If $flags is non-zero, it can take one or more of:

Sys::Virt::Domain::FD_ASSOCIATE_SECLABEL_RESTORE

Attempt to restore the label when shutting down

Sys::Virt::Domain::FD_ASSOCIATE_SECLABEL_WRITABLE

Label the FD to permit the guest to write to it.

$dom->graphics_reload($type, $flags=0)

Request a reload of graphics backend state. The $type parameter specifies what type of graphics backend to reload if there are multiple present. It takes one of the constants:

Sys::Virt::Domain::GRAPHICS_RELOAD_TYPE_ANY

Reload state for any graphics backend type

Sys::Virt::Domain::GRAPHICS_RELOAD_TYPE_VNC

Reload state for only VNC graphics backends

The $flags parameter is currently unused and defaults to zero.

CONSTANTS

A number of the APIs take a flags parameter. In most cases passing a value of zero will be satisfactory. Some APIs, however, accept named constants to alter their behaviour. This section documents the current known constants.

DOMAIN STATE

The domain state constants are useful in interpreting the state key in the hash returned by the get_info method.

Sys::Virt::Domain::STATE_NOSTATE

The domain is active, but is not running / blocked (e.g. idle)

Sys::Virt::Domain::STATE_RUNNING

The domain is active and running

Sys::Virt::Domain::STATE_BLOCKED

The domain is active, but execution is blocked

Sys::Virt::Domain::STATE_PAUSED

The domain is active, but execution has been paused

Sys::Virt::Domain::STATE_SHUTDOWN

The domain is active, but in the shutdown phase

Sys::Virt::Domain::STATE_SHUTOFF

The domain is inactive, and shut down.

Sys::Virt::Domain::STATE_CRASHED

The domain is inactive, and crashed.

Sys::Virt::Domain::STATE_PMSUSPENDED

The domain is active, but in power management suspend state

CONTROL INFO

The following constants can be used to determine what the guest domain control channel status is

Sys::Virt::Domain::CONTROL_ERROR

The control channel has a fatal error

Sys::Virt::Domain::CONTROL_OK

The control channel is ready for jobs

Sys::Virt::Domain::CONTROL_OCCUPIED

The control channel is busy

Sys::Virt::Domain::CONTROL_JOB

The control channel is busy with a job

If the status is Sys::Virt::Domain::CONTROL_ERROR, then one of the following constants describes the reason

Sys::Virt::Domain::CONTROL_ERROR_REASON_NONE

There is no reason for the error available

Sys::Virt::Domain::CONTROL_ERROR_REASON_UNKNOWN

The reason for the error is unknown

Sys::Virt::Domain::CONTROL_ERROR_REASON_INTERNAL

There was an internal error in libvirt

Sys::Virt::Domain::CONTROL_ERROR_REASON_MONITOR

There was an error speaking to the monitor

DOMAIN CREATION

The following constants can be used to control the behaviour of domain creation

Sys::Virt::Domain::START_PAUSED

Keep the guest vCPUs paused after starting the guest

Sys::Virt::Domain::START_AUTODESTROY

Automatically destroy the guest when the connection is closed (or fails)

Sys::Virt::Domain::START_BYPASS_CACHE

Do not use OS I/O cache if starting a domain with a saved state image

Sys::Virt::Domain::START_FORCE_BOOT

Boot the guest, even if there was a saved snapshot

Sys::Virt::Domain::START_VALIDATE

Validate the XML document against the XML schema

Sys::Virt::Domain::START_RESET_NVRAM

Reset the firmware NVRAM state from its original template

DOMAIN DEFINE

The following constants can be used to control the behaviour of domain define operations

Sys::Virt::Domain::DEFINE_VALIDATE

Validate the XML document against the XML schema

KEYCODE SETS

The following constants define the set of supported keycode sets

Sys::Virt::Domain::KEYCODE_SET_LINUX

The Linux event subsystem keycodes

Sys::Virt::Domain::KEYCODE_SET_XT

The original XT keycodes

Sys::Virt::Domain::KEYCODE_SET_ATSET1

The AT Set1 keycodes (aka XT)

Sys::Virt::Domain::KEYCODE_SET_ATSET2

The AT Set2 keycodes (aka AT)

Sys::Virt::Domain::KEYCODE_SET_ATSET3

The AT Set3 keycodes (aka PS2)

Sys::Virt::Domain::KEYCODE_SET_OSX

The OS-X keycodes

Sys::Virt::Domain::KEYCODE_SET_XT_KBD

The XT keycodes from the Linux Keyboard driver

Sys::Virt::Domain::KEYCODE_SET_USB

The USB HID keycode set

Sys::Virt::Domain::KEYCODE_SET_WIN32

The Windows keycode set

Sys::Virt::Domain::KEYCODE_SET_QNUM

The XT keycode set, with the extended scancodes using the high bit of the first byte, instead of the low bit of the second byte.

Sys::Virt::Domain::KEYCODE_SET_RFB

A deprecated alias for Sys::Virt::Domain::KEYCODE_SET_QNUM

MEMORY PEEK

The following constants can be used with the memory_peek method's flags parameter

Sys::Virt::Domain::MEMORY_VIRTUAL

Indicates that the offset is using virtual memory addressing.

Sys::Virt::Domain::MEMORY_PHYSICAL

Indicates that the offset is using physical memory addressing.

VCPU STATE

The following constants are useful when interpreting the virtual CPU run state

Sys::Virt::Domain::VCPU_OFFLINE

The virtual CPU is not online

Sys::Virt::Domain::VCPU_RUNNING

The virtual CPU is executing code

Sys::Virt::Domain::VCPU_BLOCKED

The virtual CPU is waiting to be scheduled

VCPU HOST PLACEMENT STATE

The following constants are useful when interpreting the virtual CPU host placement

Sys::Virt::Domain::VCPU_INFO_CPU_OFFLINE

The virtual CPU is not online

Sys::Virt::Domain::VCPU_INFO_CPU_UNAVAILABLE

The virtual CPU placement is not available from this hypervisor

OPEN GRAPHICS CONSTANTS

The following constants are used when opening a connection to the guest graphics server

Sys::Virt::Domain::OPEN_GRAPHICS_SKIPAUTH

Skip authentication of the client

OPEN CONSOLE CONSTANTS

The following constants are used when opening a connection to the guest console

Sys::Virt::Domain::OPEN_CONSOLE_FORCE

Force opening of the console, disconnecting any other open session

Sys::Virt::Domain::OPEN_CONSOLE_SAFE

Check if the console driver supports safe operations

OPEN CHANNEL CONSTANTS

The following constants are used when opening a connection to the guest channel

Sys::Virt::Domain::OPEN_CHANNEL_FORCE

Force opening of the channel, disconnecting any other open session

XML DUMP OPTIONS

The following constants are used to control the information included in the XML configuration dump

Sys::Virt::Domain::XML_INACTIVE

Report the persistent inactive configuration for the guest, even if it is currently running.

Sys::Virt::Domain::XML_SECURE

Include security sensitive information in the XML dump, such as passwords.

Sys::Virt::Domain::XML_UPDATE_CPU

Update the CPU model definition to match the current executing state.

Sys::Virt::Domain::XML_MIGRATABLE

Update the XML to allow migration to older versions of libvirt

DEVICE HOTPLUG OPTIONS

The following constants are used to control device hotplug operations

Sys::Virt::Domain::DEVICE_MODIFY_CURRENT

Modify the domain in its current state

Sys::Virt::Domain::DEVICE_MODIFY_LIVE

Modify only the live state of the domain

Sys::Virt::Domain::DEVICE_MODIFY_CONFIG

Modify only the persistent config of the domain

Sys::Virt::Domain::DEVICE_MODIFY_FORCE

Force the device to be modified

MEMORY OPTIONS

The following constants are used to control memory change operations

Sys::Virt::Domain::MEM_CURRENT

Modify the current state

Sys::Virt::Domain::MEM_LIVE

Modify only the live state of the domain

Sys::Virt::Domain::MEM_CONFIG

Modify only the persistent config of the domain

Sys::Virt::Domain::MEM_MAXIMUM

Modify the maximum memory value

CONFIG OPTIONS

The following constants are used to control what configuration a domain update changes

Sys::Virt::Domain::AFFECT_CURRENT

Modify the current state

Sys::Virt::Domain::AFFECT_LIVE

Modify only the live state of the domain

Sys::Virt::Domain::AFFECT_CONFIG

Modify only the persistent config of the domain

MIGRATE OPTIONS

The following constants are used to control how migration is performed

Sys::Virt::Domain::MIGRATE_LIVE

Migrate the guest without interrupting its execution on the source host.

Sys::Virt::Domain::MIGRATE_PEER2PEER

Manage the migration process over a direct peer-2-peer connection between the source and destination host libvirtd daemons.

Sys::Virt::Domain::MIGRATE_TUNNELLED

Tunnel the migration data over the libvirt daemon connection, rather than the native hypervisor data transport. Requires PEER2PEER flag to be set.

Sys::Virt::Domain::MIGRATE_PERSIST_DEST

Make the domain persistent on the destination host, defining its configuration file upon completion of migration.

Sys::Virt::Domain::MIGRATE_UNDEFINE_SOURCE

Remove the domain's persistent configuration after migration completes successfully.

Sys::Virt::Domain::MIGRATE_PAUSED

Do not re-start execution of the guest CPUs on the destination host after migration completes.

Sys::Virt::Domain::MIGRATE_NON_SHARED_DISK

Copy the complete contents of the disk images during migration

Sys::Virt::Domain::MIGRATE_NON_SHARED_INC

Copy the incrementally changed contents of the disk images during migration

Sys::Virt::Domain::MIGRATE_CHANGE_PROTECTION

Do not allow changes to the virtual domain configuration while migration is taking place. This option is automatically implied if doing a peer-2-peer migration.

Sys::Virt::Domain::MIGRATE_UNSAFE

Migrate even if the compatibility check indicates the migration will be unsafe to the guest.

Sys::Virt::Domain::MIGRATE_OFFLINE

Migrate the guest config if the guest is not currently running

Sys::Virt::Domain::MIGRATE_COMPRESSED

Enable compression of the migration data stream

Sys::Virt::Domain::MIGRATE_ABORT_ON_ERROR

Abort if an I/O error occurs on the disk

Sys::Virt::Domain::MIGRATE_AUTO_CONVERGE

Force convergence of the migration operation by throttling guest runtime

Sys::Virt::Domain::MIGRATE_RDMA_PIN_ALL

Pin memory for RDMA transfer

Sys::Virt::Domain::MIGRATE_POSTCOPY

Enable support for post-copy migration

Sys::Virt::Domain::MIGRATE_TLS

Setting this flag will cause the migration to attempt to use the TLS environment configured by the hypervisor in order to perform the migration. If incorrectly configured on either source or destination, the migration will fail.

Sys::Virt::Domain::MIGRATE_PARALLEL

Send memory pages to the destination host through several network connections. See Sys::Virt::Domain::MIGRATE_PARAM_PARALLEL_* parameters for configuring the parallel migration.

Sys::Virt::Domain::MIGRATE_NON_SHARED_SYNCHRONOUS_WRITES

Force the guest writes which happen when copying disk images for non-shared storage migration to be synchronously written to the destination. This ensures the storage migration converges for VMs doing heavy I/O on fast local storage and slow mirror.

Sys::Virt::Domain::MIGRATE_POSTCOPY_RESUME

Resume migration which failed in post-copy phase.

Sys::Virt::Domain::MIGRATE_ZEROCOPY

Attempt to avoid copying data. This is a request, not a guarantee and may apply to either one or both directions of data transfer at discretion of the hypervisor implementation.

UNDEFINE CONSTANTS

The following constants can be used when undefining virtual domain configurations

Sys::Virt::Domain::UNDEFINE_MANAGED_SAVE

Also remove any managed save image when undefining the virtual domain

Sys::Virt::Domain::UNDEFINE_SNAPSHOTS_METADATA

Also remove any snapshot metadata when undefining the virtual domain.

Sys::Virt::Domain::UNDEFINE_NVRAM

Also remove any NVRAM state file when undefining the virtual domain.

Sys::Virt::Domain::UNDEFINE_KEEP_NVRAM

keep NVRAM state file when undefining the virtual domain.

Sys::Virt::Domain::UNDEFINE_CHECKPOINTS_METADATA

Also remove any checkpoint metadata when undefining the virtual domain.

Sys::Virt::Domain::UNDEFINE_TPM

Also remove any TPM state when undefining the virtual domain.

Sys::Virt::Domain::UNDEFINE_KEEP_TPM

Keep TPM state when undefining the virtual domain.

JOB TYPES

The following constants describe the different background job types.

Sys::Virt::Domain::JOB_NONE

No job is active

Sys::Virt::Domain::JOB_BOUNDED

A job with a finite completion time is active

Sys::Virt::Domain::JOB_UNBOUNDED

A job with an unbounded completion time is active

Sys::Virt::Domain::JOB_COMPLETED

The job has finished, but isn't cleaned up

Sys::Virt::Domain::JOB_FAILED

The job has hit an error, but isn't cleaned up

Sys::Virt::Domain::JOB_CANCELLED

The job was aborted at user request, but isn't cleaned up

MEMORY PARAMETERS

The following constants are useful when getting/setting memory parameters for guests

Sys::Virt::Domain::MEMORY_HARD_LIMIT

The maximum memory the guest can use.

Sys::Virt::Domain::MEMORY_SOFT_LIMIT

The memory upper limit enforced during memory contention.

Sys::Virt::Domain::MEMORY_MIN_GUARANTEE

The minimum memory guaranteed to be reserved for the guest.

Sys::Virt::Domain::MEMORY_SWAP_HARD_LIMIT

The maximum swap the guest can use.

Sys::Virt::Domain::MEMORY_PARAM_UNLIMITED

The value of an unlimited memory parameter

BLKIO PARAMETERS

The following parameters control I/O tuning for the domain as a whole

Sys::Virt::Domain::BLKIO_WEIGHT

The I/O weight parameter

Sys::Virt::Domain::BLKIO_DEVICE_WEIGHT

The per-device I/O weight parameter

Sys::Virt::Domain::BLKIO_DEVICE_READ_BPS

The per-device I/O bytes read per second

Sys::Virt::Domain::BLKIO_DEVICE_READ_IOPS

The per-device I/O operations read per second

Sys::Virt::Domain::BLKIO_DEVICE_WRITE_BPS

The per-device I/O bytes write per second

Sys::Virt::Domain::BLKIO_DEVICE_WRITE_IOPS

The per-device I/O operations write per second

BLKIO TUNING PARAMETERS

The following parameters control I/O tuning for an individual guest disk.

Sys::Virt::Domain::BLOCK_IOTUNE_TOTAL_BYTES_SEC

The total bytes processed per second.

Sys::Virt::Domain::BLOCK_IOTUNE_READ_BYTES_SEC

The bytes read per second.

Sys::Virt::Domain::BLOCK_IOTUNE_WRITE_BYTES_SEC

The bytes written per second.

Sys::Virt::Domain::BLOCK_IOTUNE_TOTAL_IOPS_SEC

The total I/O operations processed per second.

Sys::Virt::Domain::BLOCK_IOTUNE_READ_IOPS_SEC

The I/O operations read per second.

Sys::Virt::Domain::BLOCK_IOTUNE_WRITE_IOPS_SEC

The I/O operations written per second.

Sys::Virt::Domain::BLOCK_IOTUNE_TOTAL_BYTES_SEC_MAX

The maximum total bytes processed per second.

Sys::Virt::Domain::BLOCK_IOTUNE_READ_BYTES_SEC_MAX

The maximum bytes read per second.

Sys::Virt::Domain::BLOCK_IOTUNE_WRITE_BYTES_SEC_MAX

The maximum bytes written per second.

Sys::Virt::Domain::BLOCK_IOTUNE_TOTAL_IOPS_SEC_MAX

The maximum total I/O operations processed per second.

Sys::Virt::Domain::BLOCK_IOTUNE_READ_IOPS_SEC_MAX

The maximum I/O operations read per second.

Sys::Virt::Domain::BLOCK_IOTUNE_WRITE_IOPS_SEC_MAX

The maximum I/O operations written per second.

Sys::Virt::Domain::BLOCK_IOTUNE_SIZE_IOPS_SEC

The maximum I/O operations per second

Sys::Virt::Domain::BLOCK_IOTUNE_GROUP_NAME

A string representing a group name to allow sharing of I/O throttling quota between multiple drives

Sys::Virt::Domain::BLOCK_IOTUNE_TOTAL_BYTES_SEC_MAX_LENGTH

The duration in seconds allowed for maximum total bytes processed per second.

Sys::Virt::Domain::BLOCK_IOTUNE_READ_BYTES_SEC_MAX_LENGTH

The duration in seconds allowed for maximum bytes read per second.

Sys::Virt::Domain::BLOCK_IOTUNE_WRITE_BYTES_SEC_MAX_LENGTH

The duration in seconds allowed for maximum bytes written per second.

Sys::Virt::Domain::BLOCK_IOTUNE_TOTAL_IOPS_SEC_MAX_LENGTH

The duration in seconds allowed for maximum total I/O operations processed per second.

Sys::Virt::Domain::BLOCK_IOTUNE_READ_IOPS_SEC_MAX_LENGTH

The duration in seconds allowed for maximum I/O operations read per second.

Sys::Virt::Domain::BLOCK_IOTUNE_WRITE_IOPS_SEC_MAX_LENGTH

The duration in seconds allowed for maximum I/O operations written per second.

SCHEDULER CONSTANTS

Sys::Virt::Domain::SCHEDULER_CAP

The VM cap tunable

Sys::Virt::Domain::SCHEDULER_CPU_SHARES

The CPU shares tunable

Sys::Virt::Domain::SCHEDULER_LIMIT

The VM limit tunable

Sys::Virt::Domain::SCHEDULER_RESERVATION

The VM reservation tunable

Sys::Virt::Domain::SCHEDULER_SHARES

The VM shares tunable

Sys::Virt::Domain::SCHEDULER_VCPU_PERIOD

The VCPU period tunable

Sys::Virt::Domain::SCHEDULER_VCPU_QUOTA

The VCPU quota tunable

Sys::Virt::Domain::SCHEDULER_GLOBAL_PERIOD

The VM global period tunable

Sys::Virt::Domain::SCHEDULER_GLOBAL_QUOTA

The VM global quota tunable

Sys::Virt::Domain::SCHEDULER_WEIGHT

The VM weight tunable

NUMA PARAMETERS

The following constants are useful when getting/setting the guest NUMA memory policy

Sys::Virt::Domain::NUMA_MODE

The NUMA policy mode

Sys::Virt::Domain::NUMA_NODESET

The NUMA nodeset mask

The following constants are useful when interpreting the Sys::Virt::Domain::NUMA_MODE parameter value

Sys::Virt::Domain::NUMATUNE_MEM_STRICT

Allocation is mandatory from the mask nodes

Sys::Virt::Domain::NUMATUNE_MEM_PREFERRED

Allocation is preferred from the masked nodes

Sys::Virt::Domain::NUMATUNE_MEM_INTERLEAVE

Allocation is interleaved across all masked nodes

Sys::Virt::Domain::NUMATUNE_MEM_RESTRICTIVE

Allocation is determined by the host using the masked nodes.

INTERFACE PARAMETERS

The following constants are useful when getting/setting the per network interface tunable parameters

Sys::Virt::Domain::BANDWIDTH_IN_AVERAGE

The average inbound bandwidth

Sys::Virt::Domain::BANDWIDTH_IN_PEAK

The peak inbound bandwidth

Sys::Virt::Domain::BANDWIDTH_IN_BURST

The burstable inbound bandwidth

Sys::Virt::Domain::BANDWIDTH_IN_FLOOR

The minimum inbound bandwidth

Sys::Virt::Domain::BANDWIDTH_OUT_AVERAGE

The average outbound bandwidth

Sys::Virt::Domain::BANDWIDTH_OUT_PEAK

The peak outbound bandwidth

Sys::Virt::Domain::BANDWIDTH_OUT_BURST

The burstable outbound bandwidth

PERF EVENTS

The following constants defined performance events which can be monitored for a guest

Sys::Virt::Domain::PERF_PARAM_CMT

The CMT event counter which can be used to measure the usage of cache (bytes) by applications running on the platform. It corresponds to the "perf.cmt" field in the *Stats APIs.

Sys::Virt::Domain::PERF_PARAM_MBML

The MBML event counter which can be used to monitor the amount of data (bytes/s) sent through the memory controller on the socket. It corresponds to the "perf.mbml" field in the *Stats APIs.

Sys::Virt::Domain::PERF_PARAM_MBMT

The MBMT event counter which can be used to monitor total system bandwidth (bytes/s) from one level of cache to another. It corresponds to the "perf.mbmt" field in the *Stats APIs.

Sys::Virt::Domain::PERF_PARAM_CACHE_MISSES

The cache_misses perf event counter which can be used to measure the count of cache misses by applications running on the platform. It corresponds to the "perf.cache_misses" field in the *Stats APIs.

Sys::Virt::Domain::PERF_PARAM_CACHE_REFERENCES

The cache_references perf event counter which can be used to measure the count of cache hits by applications running on the platform. It corresponds to the "perf.cache_references" field in the *Stats APIs.

Sys::Virt::Domain::PERF_PARAM_CPU_CYCLES

The cpu_cycles perf event counter which can be used to measure how many cpu cycles one instruction needs. It corresponds to the "perf.cpu_cycles" field in the *Stats APIs.

Sys::Virt::Domain::PERF_PARAM_INSTRUCTIONS

The instructions perf event counter which can be used to measure the count of instructions by applications running on the platform. It corresponds to the "perf.instructions" field in the *Stats APIs.

Sys::Virt::Domain::PERF_PARAM_BRANCH_INSTRUCTIONS

The branch_instructions perf event counter which can be used to measure the count of instructions by applications running on the platform. It corresponds to the "perf.branch_instructions" field in the *Stats APIs.

Sys::Virt::Domain::PERF_PARAM_BRANCH_MISSES

The branch_misses perf event which can be used to measure the count of branch misses by applications running on the platform. It corresponds to the "perf.branch_misses" field in the *Stats APIs.

Sys::Virt::Domain::PERF_PARAM_BUS_CYCLES

The bus_cycles perf event counter which can be used to measure the count of bus cycles by applications running on the platform. It corresponds to the "perf.bus_cycles" field in the *Stats APIs.

Sys::Virt::Domain::PERF_PARAM_STALLED_CYCLES_FRONTEND

The stalled_cycles_frontend perf event counter which can be used to measure the count of stalled cpu cycles in the frontend of the instruction processor pipeline by applications running on the platform. It corresponds to the "perf.stalled_cycles_frontend" field in the *Stats APIs.

Sys::Virt::Domain::PERF_PARAM_STALLED_CYCLES_BACKEND

The stalled_cycles_backend perf event counter which can be used to measure the count of stalled cpu cycles in the backend of the instruction processor pipeline by application running on the platform. It corresponds to the "perf.stalled_cycles_backend" field in the *Stats APIs.

Sys::Virt::Domain::PERF_PARAM_REF_CPU_CYCLES

The ref_cpu_cycles perf event counter which can be used to measure the count of total cpu cycles not affected by CPU frequency scaling by applications running on the platform. It corresponds to the "perf.ref_cpu_cycles" field in the *Stats APIs.

Sys::Virt::Domain::PERF_PARAM_CPU_CLOCK

The cpu_clock perf event counter which can be used to measure the count of cpu clock time by applications running on the platform. It corresponds to the "perf.cpu_clock" field in the *Stats APIs.

Sys::Virt::Domain::PERF_PARAM_TASK_CLOCK

The task_clock perf event counter which can be used to measure the count of task clock time by applications running on the platform. It corresponds to the "perf.task_clock" field in the *Stats APIs.

Sys::Virt::Domain::PERF_PARAM_PAGE_FAULTS

The page_faults perf event counter which can be used to measure the count of page faults by applications running on the platform. It corresponds to the "perf.page_faults" field in the *Stats APIs.

Sys::Virt::Domain::PERF_PARAM_CONTEXT_SWITCHES

The context_switches perf event counter which can be used to measure the count of context switches by applications running on the platform. It corresponds to the "perf.context_switches" field in the *Stats APIs.

Sys::Virt::Domain::PERF_PARAM_CPU_MIGRATIONS

The cpu_migrations perf event counter which can be used to measure the count of cpu migrations by applications running on the platform. It corresponds to the "perf.cpu_migrations" field in the *Stats APIs.

Sys::Virt::Domain::PERF_PARAM_PAGE_FAULTS_MIN

The page_faults_min perf event counter which can be used to measure the count of minor page faults by applications running on the platform. It corresponds to the "perf.page_faults_min" field in the *Stats APIs.

Sys::Virt::Domain::PERF_PARAM_PAGE_FAULTS_MAJ

The page_faults_maj perf event counter which can be used to measure the count of major page faults by applications running on the platform. It corresponds to the "perf.page_faults_maj" field in the *Stats APIs.

Sys::Virt::Domain::PERF_PARAM_ALIGNMENT_FAULTS

The alignment_faults perf event counter which can be used to measure the count of alignment faults by applications running on the platform. It corresponds to the "perf.alignment_faults" field in the *Stats APIs.

Sys::Virt::Domain::PERF_PARAM_EMULATION_FAULTS

The emulation_faults perf event counter which can be used to measure the count of emulation faults by applications running on the platform. It corresponds to the "perf.emulation_faults" field in the *Stats APIs.

IOTHREAD STATS

The following constants defined IOThread statistics which can be monitored for a guest

Sys::Virt::Domain::IOTHREAD_PARAM_POLL_MAX_NS

The maximum polling time that can be used by polling algorithm in ns. The polling time starts at 0 (zero) and is the time spent by the guest to process IOThread data before returning the CPU to the host. The polling time will be dynamically modified over time based on the poll_grow and poll_shrink parameters provided.

Sys::Virt::Domain::IOTHREAD_PARAM_POLL_GROW

This provides a value for the dynamic polling adjustment algorithm to use to grow its polling interval up to the poll_max_ns value.

Sys::Virt::Domain::IOTHREAD_PARAM_POLL_SHRINK

This provides a value for the dynamic polling adjustment algorithm to use to shrink its polling interval when the polling interval exceeds the poll_max_ns value.

Sys::Virt::Domain::IOTHREAD_PARAM_THREAD_POOL_MIN

Sets the lower bound for thread pool size. A value of -1 disables this bound leaving hypervisor use its default value, though this value is not accepted for running domains. Due to internal implementation it's recommended to set lower and upper bounds separately.

Sys::Virt::Domain::IOTHREAD_PARAM_THREAD_POOL_MAX

Sets the upper bound for thread pool size. A value of -1 disables this bound leaving hypervisor use its default value, though this value is not accepted for running domains. Since the upper band has to be equal to or greater than lower bound value of 0 is not accepted. Due to internal implementation it's recommended to set lower and upper bounds separately.

VCPU FLAGS

The following constants are useful when getting/setting the VCPU count for a guest

Sys::Virt::Domain::VCPU_LIVE

Flag to request the live value

Sys::Virt::Domain::VCPU_CONFIG

Flag to request the persistent config value

Sys::Virt::Domain::VCPU_CURRENT

Flag to request the current config value

Sys::Virt::Domain::VCPU_MAXIMUM

Flag to request adjustment of the maximum vCPU value

Sys::Virt::Domain::VCPU_GUEST

Flag to request the guest VCPU mask

Sys::Virt::Domain::VCPU_HOTPLUGGABLE

Flag to make vcpus added hot(un)pluggable

STATE CHANGE EVENTS

The following constants allow domain state change events to be interpreted. The events contain both a state change, and a reason.

Sys::Virt::Domain::EVENT_DEFINED

Indicates that a persistent configuration has been defined for the domain.

Sys::Virt::Domain::EVENT_DEFINED_ADDED

The defined configuration is newly added

Sys::Virt::Domain::EVENT_DEFINED_UPDATED

The defined configuration is an update to an existing configuration

Sys::Virt::Domain::EVENT_DEFINED_RENAMED

The defined configuration is a rename of an existing configuration

Sys::Virt::Domain::EVENT_DEFINED_FROM_SNAPSHOT

The defined configuration was restored from a snapshot

Sys::Virt::Domain::EVENT_RESUMED

The domain has resumed execution

Sys::Virt::Domain::EVENT_RESUMED_MIGRATED

The domain resumed because migration has completed. This is emitted on the destination host.

Sys::Virt::Domain::EVENT_RESUMED_UNPAUSED

The domain resumed because the admin unpaused it.

Sys::Virt::Domain::EVENT_RESUMED_FROM_SNAPSHOT

The domain resumed because it was restored from a snapshot

Sys::Virt::Domain::EVENT_RESUMED_POSTCOPY

The domain resumed but post-copy is running in background

Sys::Virt::Domain::EVENT_RESUMED_POSTCOPY_FAILED

The domain is running, but migration failed in post-copy.

Sys::Virt::Domain::EVENT_STARTED

The domain has started running

Sys::Virt::Domain::EVENT_STARTED_BOOTED

The domain was booted from shutoff state

Sys::Virt::Domain::EVENT_STARTED_MIGRATED

The domain started due to an incoming migration

Sys::Virt::Domain::EVENT_STARTED_RESTORED

The domain was restored from saved state file

Sys::Virt::Domain::EVENT_STARTED_FROM_SNAPSHOT

The domain was restored from a snapshot

Sys::Virt::Domain::EVENT_STARTED_WAKEUP

The domain was woken up from suspend

Sys::Virt::Domain::EVENT_STOPPED

The domain has stopped running

Sys::Virt::Domain::EVENT_STOPPED_CRASHED

The domain stopped because guest operating system has crashed

Sys::Virt::Domain::EVENT_STOPPED_DESTROYED

The domain stopped because administrator issued a destroy command.

Sys::Virt::Domain::EVENT_STOPPED_FAILED

The domain stopped because of a fault in the host virtualization environment.

Sys::Virt::Domain::EVENT_STOPPED_MIGRATED

The domain stopped because it was migrated to another machine.

Sys::Virt::Domain::EVENT_STOPPED_SAVED

The domain was saved to a state file

Sys::Virt::Domain::EVENT_STOPPED_SHUTDOWN

The domain stopped due to graceful shutdown of the guest.

Sys::Virt::Domain::EVENT_STOPPED_FROM_SNAPSHOT

The domain was stopped due to a snapshot

Sys::Virt::Domain::EVENT_SHUTDOWN

The domain has shutdown but is not yet stopped

Sys::Virt::Domain::EVENT_SHUTDOWN_FINISHED

The domain finished shutting down

Sys::Virt::Domain::EVENT_SHUTDOWN_HOST

The domain shutdown due to host trigger

Sys::Virt::Domain::EVENT_SHUTDOWN_GUEST

The domain shutdown due to guest trigger

Sys::Virt::Domain::EVENT_SUSPENDED

The domain has stopped executing, but still exists

Sys::Virt::Domain::EVENT_SUSPENDED_MIGRATED

The domain has been suspended due to offline migration

Sys::Virt::Domain::EVENT_SUSPENDED_PAUSED

The domain has been suspended due to administrator pause request.

Sys::Virt::Domain::EVENT_SUSPENDED_IOERROR

The domain has been suspended due to a block device I/O error.

Sys::Virt::Domain::EVENT_SUSPENDED_FROM_SNAPSHOT

The domain has been suspended due to resume from snapshot

Sys::Virt::Domain::EVENT_SUSPENDED_WATCHDOG

The domain has been suspended due to the watchdog triggering

Sys::Virt::Domain::EVENT_SUSPENDED_RESTORED

The domain has been suspended due to restore from saved state

Sys::Virt::Domain::EVENT_SUSPENDED_API_ERROR

The domain has been suspended due to an API error

Sys::Virt::Domain::EVENT_SUSPENDED_POSTCOPY

The domain has been suspended for post-copy migration

Sys::Virt::Domain::EVENT_SUSPENDED_POSTCOPY_FAILED

The domain has been suspended due post-copy migration failing

Sys::Virt::Domain::EVENT_UNDEFINED

The persistent configuration has gone away

Sys::Virt::Domain::EVENT_UNDEFINED_REMOVED

The domain configuration has gone away due to it being removed by administrator.

Sys::Virt::Domain::EVENT_UNDEFINED_RENAMED

The undefined configuration is a rename of an existing configuration

Sys::Virt::Domain::EVENT_PMSUSPENDED

The domain has stopped running

Sys::Virt::Domain::EVENT_PMSUSPENDED_MEMORY

The domain has suspend to RAM.

Sys::Virt::Domain::EVENT_PMSUSPENDED_DISK

The domain has suspend to Disk.

Sys::Virt::Domain::EVENT_CRASHED

The domain has crashed

Sys::Virt::Domain::EVENT_CRASHED_PANICKED

The domain has crashed due to a kernel panic

Sys::Virt::Domain::EVENT_CRASHED_CRASHLOADED

The domain has crashed and reloaded itself

EVENT ID CONSTANTS

Sys::Virt::Domain::EVENT_ID_LIFECYCLE

Domain lifecycle events

Sys::Virt::Domain::EVENT_ID_REBOOT

Soft / warm reboot events

Sys::Virt::Domain::EVENT_ID_RTC_CHANGE

RTC clock adjustments

Sys::Virt::Domain::EVENT_ID_IO_ERROR

File IO errors, typically from disks

Sys::Virt::Domain::EVENT_ID_WATCHDOG

Watchdog device triggering

Sys::Virt::Domain::EVENT_ID_GRAPHICS

Graphics client connections.

Sys::Virt::Domain::EVENT_ID_IO_ERROR_REASON

File IO errors, typically from disks, with a root cause

Sys::Virt::Domain::EVENT_ID_CONTROL_ERROR

Errors from the virtualization control channel

Sys::Virt::Domain::EVENT_ID_BLOCK_JOB

Completion status of asynchronous block jobs, identified by source file name.

Sys::Virt::Domain::EVENT_ID_BLOCK_JOB_2

Completion status of asynchronous block jobs, identified by target device name.

Sys::Virt::Domain::EVENT_ID_DISK_CHANGE

Changes in disk media

Sys::Virt::Domain::EVENT_ID_TRAY_CHANGE

CDROM media tray state

Sys::Virt::Domain::EVENT_ID_PMSUSPEND

Power management initiated suspend to RAM

Sys::Virt::Domain::EVENT_ID_PMSUSPEND_DISK

Power management initiated suspend to Disk

Sys::Virt::Domain::EVENT_ID_PMWAKEUP

Power management initiated wakeup

Sys::Virt::Domain::EVENT_ID_BALLOON_CHANGE

Balloon target changes

Sys::Virt::Domain::EVENT_ID_DEVICE_ADDED

Asynchronous guest device addition

Sys::Virt::Domain::EVENT_ID_DEVICE_REMOVED

Asynchronous guest device removal

Sys::Virt::Domain::EVENT_ID_TUNABLE

Changes of any domain tuning parameters. The callback will be provided with a hash listing all changed parameters. The later DOMAIN TUNABLE constants can be useful when accessing the hash keys

Sys::Virt::Domain::EVENT_ID_AGENT_LIFECYCLE

Domain guest agent lifecycle events. The state parameter to the callback will match one of the constants

Sys::Virt::Domain::EVENT_AGENT_LIFECYCLE_STATE_CONNECTED

The agent is now connected

Sys::Virt::Domain::EVENT_AGENT_LIFECYCLE_STATE_DISCONNECTED

The agent is now disconnected

The second parameter, reason, matches one of the following constants

Sys::Virt::Domain::EVENT_ID_MIGRATION_ITERATION

Domain migration progress iteration. The iteration parameter to the callback will specify the number of iterations migration has made over guest RAM.

Sys::Virt::Domain::EVENT_AGENT_LIFECYCLE_REASON_UNKNOWN

The reason is unknown

Sys::Virt::Domain::EVENT_AGENT_LIFECYCLE_REASON_DOMAIN_STARTED

The domain was initially booted

Sys::Virt::Domain::EVENT_AGENT_LIFECYCLE_REASON_CHANNEL

The channel on a running guest changed state

Sys::Virt::Domain::EVENT_ID_JOB_COMPLETED

Domain background job completion notification. The callback provides a hash containing the job stats. The keys in the hash are the same as those used with the Sys::Virt::Domain::get_job_stats() method.

Sys::Virt::Domain::EVENT_ID_DEVICE_REMOVAL_FAILED

Guest device removal has failed.

Sys::Virt::Domain::EVENT_ID_METADATA_CHANGE

The domain metadata has changed

Sys::Virt::Domain::EVENT_ID_BLOCK_THRESHOLD

The event occurs when the hypervisor detects that the given storage element was written beyond the point specified by threshold. The event is useful for thin-provisioned storage.

Sys::Virt::Domain::EVENT_ID_MEMORY_FAILURE

The event occurs when the hypervisor detects hardware memory corruption.

Sys::Virt::Domain::EVENT_ID_MEMORY_DEVICE_SIZE_CHANGE

The event occurs when the guest accepts a request to change the memory device size.

IO ERROR EVENT CONSTANTS

These constants describe what action was taken due to the IO error.

Sys::Virt::Domain::EVENT_IO_ERROR_NONE

No action was taken, the error was ignored & reported as success to guest

Sys::Virt::Domain::EVENT_IO_ERROR_PAUSE

The guest is paused since the error occurred

Sys::Virt::Domain::EVENT_IO_ERROR_REPORT

The error has been reported to the guest OS

WATCHDOG EVENT CONSTANTS

These constants describe what action was taken due to the watchdog firing

Sys::Virt::Domain::EVENT_WATCHDOG_NONE

No action was taken, the watchdog was ignored

Sys::Virt::Domain::EVENT_WATCHDOG_PAUSE

The guest is paused since the watchdog fired

Sys::Virt::Domain::EVENT_WATCHDOG_POWEROFF

The guest is powered off after the watchdog fired

Sys::Virt::Domain::EVENT_WATCHDOG_RESET

The guest is reset after the watchdog fired

Sys::Virt::Domain::EVENT_WATCHDOG_SHUTDOWN

The guest attempted to gracefully shutdown after the watchdog fired

Sys::Virt::Domain::EVENT_WATCHDOG_DEBUG

No action was taken, the watchdog was logged

Sys::Virt::Domain::EVENT_WATCHDOG_INJECTNMI

An NMI was injected into the guest after the watchdog fired

GRAPHICS EVENT PHASE CONSTANTS

These constants describe the phase of the graphics connection

Sys::Virt::Domain::EVENT_GRAPHICS_CONNECT

The initial client connection

Sys::Virt::Domain::EVENT_GRAPHICS_INITIALIZE

The client has been authenticated & the connection is running

Sys::Virt::Domain::EVENT_GRAPHICS_DISCONNECT

The client has disconnected

GRAPHICS EVENT ADDRESS CONSTANTS

These constants describe the format of the address

Sys::Virt::Domain::EVENT_GRAPHICS_ADDRESS_IPV4

An IPv4 address

Sys::Virt::Domain::EVENT_GRAPHICS_ADDRESS_IPV6

An IPv6 address

Sys::Virt::Domain::EVENT_GRAPHICS_ADDRESS_UNIX

An UNIX socket path address

DISK CHANGE EVENT CONSTANTS

These constants describe the reason for a disk change event

Sys::Virt::Domain::EVENT_DISK_CHANGE_MISSING_ON_START

The disk media was cleared, as its source was missing when attempting to start the guest

Sys::Virt::Domain::EVENT_DISK_DROP_MISSING_ON_START

The disk device was dropped, as its source was missing when attempting to start the guest

TRAY CHANGE CONSTANTS

These constants describe the reason for a tray change event

Sys::Virt::Domain::EVENT_TRAY_CHANGE_CLOSE

The tray was closed

Sys::Virt::Domain::EVENT_TRAY_CHANGE_OPEN

The tray was opened

DOMAIN BLOCK JOB TYPE CONSTANTS

The following constants identify the different types of domain block jobs

Sys::Virt::Domain::BLOCK_JOB_TYPE_UNKNOWN

An unknown block job type

Sys::Virt::Domain::BLOCK_JOB_TYPE_PULL

The block pull job type

Sys::Virt::Domain::BLOCK_JOB_TYPE_COPY

The block copy job type

Sys::Virt::Domain::BLOCK_JOB_TYPE_COMMIT

The block commit job type

Sys::Virt::Domain::BLOCK_JOB_TYPE_ACTIVE_COMMIT

The block active commit job type

Sys::Virt::Domain::BLOCK_JOB_TYPE_BACKUP

The block backup job type

DOMAIN BLOCK JOB COMPLETION CONSTANTS

The following constants can be used to determine the completion status of a block job

Sys::Virt::Domain::BLOCK_JOB_COMPLETED

A successfully completed block job

Sys::Virt::Domain::BLOCK_JOB_FAILED

An unsuccessful block job

Sys::Virt::Domain::BLOCK_JOB_CANCELED

A block job canceled by the user

Sys::Virt::Domain::BLOCK_JOB_READY

A block job is running

DOMAIN BLOCK REBASE CONSTANTS

The following constants are useful when rebasing block devices

Sys::Virt::Domain::BLOCK_REBASE_SHALLOW

Limit copy to top of source backing chain

Sys::Virt::Domain::BLOCK_REBASE_REUSE_EXT

Reuse existing external file for copy

Sys::Virt::Domain::BLOCK_REBASE_COPY_RAW

Make destination file raw

Sys::Virt::Domain::BLOCK_REBASE_COPY

Start a copy job

Sys::Virt::Domain::BLOCK_REBASE_COPY_DEV

Treat destination as a block device instead of file

Sys::Virt::Domain::BLOCK_REBASE_RELATIVE

Keep backing chain referenced using relative names

DOMAIN BLOCK COPY CONSTANTS

The following constants are useful when copying block devices

Sys::Virt::Domain::BLOCK_COPY_SHALLOW

Limit copy to top of source backing chain

Sys::Virt::Domain::BLOCK_COPY_REUSE_EXT

Reuse existing external file for copy

Sys::Virt::Domain::BLOCK_COPY_TRANSIENT_JOB

Don't force usage of recoverable job for the copy operation

Sys::Virt::Domain::BLOCK_COPY_SYNCHRONOUS_WRITES

Force the copy job to synchronously propagate guest writes into the destination image, so that the copy is guaranteed to converge

DOMAIN BLOCK JOB ABORT CONSTANTS

The following constants are useful when aborting job copy jobs

Sys::Virt::Domain::BLOCK_JOB_ABORT_ASYNC

Request only, do not wait for completion

Sys::Virt::Domain::BLOCK_JOB_ABORT_PIVOT

Pivot to mirror when ending a copy job

DOMAIN BLOCK COMMIT JOB CONSTANTS

The following constants are useful with block commit job types

Sys::Virt::Domain::BLOCK_COMMIT_DELETE

Delete any files that are invalid after commit

Sys::Virt::Domain::BLOCK_COMMIT_SHALLOW

NULL base means next backing file, not whole chain

Sys::Virt::Domain::BLOCK_COMMIT_ACTIVE

Allow two phase commit when top is active layer

Sys::Virt::Domain::BLOCK_COMMIT_RELATIVE

Keep backing chain referenced using relative names

DOMAIN SAVE / RESTORE FLAG CONSTANTS

The following constants can be used when saving or restoring virtual machines

Sys::Virt::Domain::SAVE_BYPASS_CACHE

Do not use OS I/O cache when saving state.

Sys::Virt::Domain::SAVE_PAUSED

Mark the saved state as paused to prevent the guest CPUs starting upon restore.

Sys::Virt::Domain::SAVE_RUNNING

Mark the saved state as running to allow the guest CPUs to start upon restore.

Sys::Virt::Domain::SAVE_RESET_NVRAM

Reset the firmware NVRAM state from its original template

SAVE / RESTORE PARAMETER CONSTANTS

Sys::Virt::Domain::SAVE_PARAM_FILE

Specify the save state file to save to or restore from.

Sys::Virt::Domain::SAVE_PARAM_DXML

Used to adjust guest xml on restore, e.g. to alter a device while domain is stopped.

DOMAIN CORE DUMP CONSTANTS

The following constants can be used when triggering domain core dumps

Sys::Virt::Domain::DUMP_LIVE

Do not pause execution while dumping the guest

Sys::Virt::Domain::DUMP_CRASH

Crash the guest after completing the core dump

Sys::Virt::Domain::DUMP_BYPASS_CACHE

Do not use OS I/O cache when writing core dump

Sys::Virt::Domain::DUMP_RESET

Reset the virtual machine after finishing the dump

Sys::Virt::Domain::DUMP_MEMORY_ONLY

Only include guest RAM in the dump, not the device state

DESTROY CONSTANTS

The following constants are useful when terminating guests using the destroy API.

Sys::Virt::Domain::DESTROY_DEFAULT

Destroy the guest using the default approach

Sys::Virt::Domain::DESTROY_GRACEFUL

Destroy the guest in a graceful manner

Sys::Virt::Domain::DESTROY_REMOVE_LOGS

Delete log files associated with the guest

SHUTDOWN CONSTANTS

The following constants are useful when requesting that a guest terminate using the shutdown API

Sys::Virt::Domain::SHUTDOWN_DEFAULT

Shutdown using the hypervisor's default mechanism

Sys::Virt::Domain::SHUTDOWN_GUEST_AGENT

Shutdown by issuing a command to a guest agent

Sys::Virt::Domain::SHUTDOWN_ACPI_POWER_BTN

Shutdown by injecting an ACPI power button press

Sys::Virt::Domain::SHUTDOWN_INITCTL

Shutdown by talking to initctl (containers only)

Sys::Virt::Domain::SHUTDOWN_SIGNAL

Shutdown by sending SIGTERM to the init process

Sys::Virt::Domain::SHUTDOWN_PARAVIRT

Shutdown by issuing a paravirt power control command

REBOOT CONSTANTS

The following constants are useful when requesting that a guest terminate using the reboot API

Sys::Virt::Domain::REBOOT_DEFAULT

Reboot using the hypervisor's default mechanism

Sys::Virt::Domain::REBOOT_GUEST_AGENT

Reboot by issuing a command to a guest agent

Sys::Virt::Domain::REBOOT_ACPI_POWER_BTN

Reboot by injecting an ACPI power button press

Sys::Virt::Domain::REBOOT_INITCTL

Reboot by talking to initctl (containers only)

Sys::Virt::Domain::REBOOT_SIGNAL

Reboot by sending SIGHUP to the init process

Sys::Virt::Domain::REBOOT_PARAVIRT

Reboot by issuing a paravirt power control command

METADATA CONSTANTS

The following constants are useful when reading/writing metadata about a guest

Sys::Virt::Domain::METADATA_TITLE

The short human friendly title of the guest

Sys::Virt::Domain::METADATA_DESCRIPTION

The long free text description of the guest

Sys::Virt::Domain::METADATA_ELEMENT

The structured metadata elements for the guest

DISK ERROR CONSTANTS

The following constants are useful when interpreting disk error codes

Sys::Virt::Domain::DISK_ERROR_NONE

No error

Sys::Virt::Domain::DISK_ERROR_NO_SPACE

The host storage has run out of free space

Sys::Virt::Domain::DISK_ERROR_UNSPEC

An unspecified error has occurred.

MEMORY STATISTIC CONSTANTS

Sys::Virt::Domain::MEMORY_STAT_SWAP_IN

Swap in

Sys::Virt::Domain::MEMORY_STAT_SWAP_OUT

Swap out

Sys::Virt::Domain::MEMORY_STAT_MINOR_FAULT

Minor faults

Sys::Virt::Domain::MEMORY_STAT_MAJOR_FAULT

Major faults

Sys::Virt::Domain::MEMORY_STAT_RSS

Resident memory

Sys::Virt::Domain::MEMORY_STAT_UNUSED

Unused memory

Sys::Virt::Domain::MEMORY_STAT_AVAILABLE

Available memory

Sys::Virt::Domain::MEMORY_STAT_ACTUAL_BALLOON

Actual balloon limit

Sys::Virt::Domain::MEMORY_STAT_USABLE

Amount of usable memory

Sys::Virt::Domain::MEMORY_STAT_LAST_UPDATE

Time of last stats refresh from guest

Sys::Virt::Domain::MEMORY_STAT_DISK_CACHES

Disk cache size

Sys::Virt::Domain::MEMORY_STAT_HUGETLB_PGALLOC

The amount of successful huge page allocations

Sys::Virt::Domain::MEMORY_STAT_HUGETLB_PGFAIL

The amount of failed huge page allocations

DOMAIN LIST CONSTANTS

The following constants can be used when listing domains

Sys::Virt::Domain::LIST_ACTIVE

Only list domains that are currently active (running, or paused)

Sys::Virt::Domain::LIST_AUTOSTART

Only list domains that are set to automatically start on boot

Sys::Virt::Domain::LIST_HAS_SNAPSHOT

Only list domains that have a stored snapshot

Sys::Virt::Domain::LIST_INACTIVE

Only list domains that are currently inactive (shutoff, saved)

Sys::Virt::Domain::LIST_MANAGEDSAVE

Only list domains that have current managed save state

Sys::Virt::Domain::LIST_NO_AUTOSTART

Only list domains that are not set to automatically start on boto

Sys::Virt::Domain::LIST_NO_MANAGEDSAVE

Only list domains that do not have any managed save state

Sys::Virt::Domain::LIST_NO_SNAPSHOT

Only list domains that do not have a stored snapshot

Sys::Virt::Domain::LIST_OTHER

Only list domains that are not running, paused or shutoff

Sys::Virt::Domain::LIST_PAUSED

Only list domains that are paused

Sys::Virt::Domain::LIST_PERSISTENT

Only list domains which have a persistent config

Sys::Virt::Domain::LIST_RUNNING

Only list domains that are currently running

Sys::Virt::Domain::LIST_SHUTOFF

Only list domains that are currently shutoff

Sys::Virt::Domain::LIST_TRANSIENT

Only list domains that do not have a persistent config

Sys::Virt::Domain::LIST_HAS_CHECKPOINT

Only list domains that have a stored checkpoint

Sys::Virt::Domain::LIST_NO_CHECKPOINT

Only list domains that do not have a stored checkpoint

SEND KEY CONSTANTS

The following constants are to be used with the send_key API

Sys::Virt::Domain::SEND_KEY_MAX_KEYS

The maximum number of keys that can be sent in a single call to send_key

BLOCK STATS CONSTANTS

The following constants provide the names of well known block stats fields

Sys::Virt::Domain::BLOCK_STATS_ERRS

The number of I/O errors

Sys::Virt::Domain::BLOCK_STATS_FLUSH_REQ

The number of flush requests

Sys::Virt::Domain::BLOCK_STATS_FLUSH_TOTAL_TIMES

The time spent processing flush requests

Sys::Virt::Domain::BLOCK_STATS_READ_BYTES

The amount of data read

Sys::Virt::Domain::BLOCK_STATS_READ_REQ

The number of read requests

Sys::Virt::Domain::BLOCK_STATS_READ_TOTAL_TIMES

The time spent processing read requests

Sys::Virt::Domain::BLOCK_STATS_WRITE_BYTES

The amount of data written

Sys::Virt::Domain::BLOCK_STATS_WRITE_REQ

The number of write requests

Sys::Virt::Domain::BLOCK_STATS_WRITE_TOTAL_TIMES

The time spent processing write requests

CPU STATS CONSTANTS

The following constants provide the names of well known cpu stats fields

Sys::Virt::Domain::CPU_STATS_CPUTIME

The total CPU time, including both hypervisor and vCPU time.

Sys::Virt::Domain::CPU_STATS_USERTIME

THe total time in kernel

Sys::Virt::Domain::CPU_STATS_SYSTEMTIME

The total time in userspace

Sys::Virt::Domain::CPU_STATS_VCPUTIME

The total vCPU time.

CPU STATS CONSTANTS

The following constants provide the names of well known schedular parameters

Sys::Virt::SCHEDULER_EMULATOR_PERIOD

The duration of the time period for scheduling the emulator

Sys::Virt::SCHEDULER_EMULATOR_QUOTA

The quota for the emulator in one schedular time period

Sys::Virt::SCHEDULER_IOTHREAD_PERIOD

The duration of the time period for scheduling the iothread

Sys::Virt::SCHEDULER_IOTHREAD_QUOTA

The quota for the iothread in one schedular time period

DOMAIN STATS FLAG CONSTANTS

The following constants are used as flags when requesting bulk domain stats from Sys::Virt::get_all_domain_stats.

Sys::Virt::Domain::GET_ALL_STATS_ACTIVE

Include stats for active domains

Sys::Virt::Domain::GET_ALL_STATS_INACTIVE

Include stats for inactive domains

Sys::Virt::Domain::GET_ALL_STATS_OTHER

Include stats for other domains

Sys::Virt::Domain::GET_ALL_STATS_PAUSED

Include stats for paused domains

Sys::Virt::Domain::GET_ALL_STATS_PERSISTENT

Include stats for persistent domains

Sys::Virt::Domain::GET_ALL_STATS_RUNNING

Include stats for running domains

Sys::Virt::Domain::GET_ALL_STATS_SHUTOFF

Include stats for shutoff domains

Sys::Virt::Domain::GET_ALL_STATS_TRANSIENT

Include stats for transient domains

Sys::Virt::Domain::GET_ALL_STATS_ENFORCE_STATS

Require that all requested stats fields are returned

Sys::Virt::Domain::GET_ALL_STATS_BACKING

Get stats for image backing files too

Sys::Virt::Domain::GET_ALL_STATS_NOWAIT

Skip stats if they can't be acquired without waiting

DOMAIN STATS FIELD CONSTANTS

The following constants are used to control which fields are returned for stats queries.

Sys::Virt::Domain::STATS_BALLOON

Balloon statistics

Sys::Virt::Domain::STATS_BLOCK

Block device info

Sys::Virt::Domain::STATS_CPU_TOTAL

CPU usage info

Sys::Virt::Domain::STATS_INTERFACE

Network interface info

Sys::Virt::Domain::STATS_STATE

General lifecycle state

Sys::Virt::Domain::STATS_VCPU

Virtual CPU info

Sys::Virt::Domain::STATS_PERF

Performance event counter values

Sys::Virt::Domain::STATS_IOTHREAD

IOThread performance statistics values

Sys::Virt::Domain::STATS_MEMORY

Memory bandwidth statistics values

Sys::Virt::Domain::STATS_DIRTYRATE

Memory dirty rate statistics

Sys::Virt::Domain::STATS_VM

Hypervisor-specific stats fields for given VM

PROCESS SIGNALS

The following constants provide the names of signals which can be sent to guest processes. They mostly correspond to POSIX signal names.

Sys::Virt::Domain::PROCESS_SIGNAL_NOP

SIGNOP

Sys::Virt::Domain::PROCESS_SIGNAL_HUP

SIGHUP

Sys::Virt::Domain::PROCESS_SIGNAL_INT

SIGINT

Sys::Virt::Domain::PROCESS_SIGNAL_QUIT

SIGQUIT

Sys::Virt::Domain::PROCESS_SIGNAL_ILL

SIGILL

Sys::Virt::Domain::PROCESS_SIGNAL_TRAP

SIGTRAP

Sys::Virt::Domain::PROCESS_SIGNAL_ABRT

SIGABRT

Sys::Virt::Domain::PROCESS_SIGNAL_BUS

SIGBUS

Sys::Virt::Domain::PROCESS_SIGNAL_FPE

SIGFPE

Sys::Virt::Domain::PROCESS_SIGNAL_KILL

SIGKILL

Sys::Virt::Domain::PROCESS_SIGNAL_USR1

SIGUSR1

Sys::Virt::Domain::PROCESS_SIGNAL_SEGV

SIGSEGV

Sys::Virt::Domain::PROCESS_SIGNAL_USR2

SIGUSR2

Sys::Virt::Domain::PROCESS_SIGNAL_PIPE

SIGPIPE

Sys::Virt::Domain::PROCESS_SIGNAL_ALRM

SIGALRM

Sys::Virt::Domain::PROCESS_SIGNAL_TERM

SIGTERM

Sys::Virt::Domain::PROCESS_SIGNAL_STKFLT

SIGSTKFLT

Sys::Virt::Domain::PROCESS_SIGNAL_CHLD

SIGCHLD

Sys::Virt::Domain::PROCESS_SIGNAL_CONT

SIGCONT

Sys::Virt::Domain::PROCESS_SIGNAL_STOP

SIGSTOP

Sys::Virt::Domain::PROCESS_SIGNAL_TSTP

SIGTSTP

Sys::Virt::Domain::PROCESS_SIGNAL_TTIN

SIGTTIN

Sys::Virt::Domain::PROCESS_SIGNAL_TTOU

SIGTTOU

Sys::Virt::Domain::PROCESS_SIGNAL_URG

SIGURG

Sys::Virt::Domain::PROCESS_SIGNAL_XCPU

SIGXCPU

Sys::Virt::Domain::PROCESS_SIGNAL_XFSZ

SIGXFSZ

Sys::Virt::Domain::PROCESS_SIGNAL_VTALRM

SIGVTALRM

Sys::Virt::Domain::PROCESS_SIGNAL_PROF

SIGPROF

Sys::Virt::Domain::PROCESS_SIGNAL_WINCH

SIGWINCH

Sys::Virt::Domain::PROCESS_SIGNAL_POLL

SIGPOLL

Sys::Virt::Domain::PROCESS_SIGNAL_PWR

SIGPWR

Sys::Virt::Domain::PROCESS_SIGNAL_SYS

SIGSYS

Sys::Virt::Domain::PROCESS_SIGNAL_RT0

SIGRT0

Sys::Virt::Domain::PROCESS_SIGNAL_RT1

SIGRT1

Sys::Virt::Domain::PROCESS_SIGNAL_RT2

SIGRT2

Sys::Virt::Domain::PROCESS_SIGNAL_RT3

SIGRT3

Sys::Virt::Domain::PROCESS_SIGNAL_RT4

SIGRT4

Sys::Virt::Domain::PROCESS_SIGNAL_RT5

SIGRT5

Sys::Virt::Domain::PROCESS_SIGNAL_RT6

SIGRT6

Sys::Virt::Domain::PROCESS_SIGNAL_RT7

SIGRT7

Sys::Virt::Domain::PROCESS_SIGNAL_RT8

SIGRT8

Sys::Virt::Domain::PROCESS_SIGNAL_RT9

SIGRT9

Sys::Virt::Domain::PROCESS_SIGNAL_RT10

SIGRT10

Sys::Virt::Domain::PROCESS_SIGNAL_RT11

SIGRT11

Sys::Virt::Domain::PROCESS_SIGNAL_RT12

SIGRT12

Sys::Virt::Domain::PROCESS_SIGNAL_RT13

SIGRT13

Sys::Virt::Domain::PROCESS_SIGNAL_RT14

SIGRT14

Sys::Virt::Domain::PROCESS_SIGNAL_RT15

SIGRT15

Sys::Virt::Domain::PROCESS_SIGNAL_RT16

SIGRT16

Sys::Virt::Domain::PROCESS_SIGNAL_RT17

SIGRT17

Sys::Virt::Domain::PROCESS_SIGNAL_RT18

SIGRT18

Sys::Virt::Domain::PROCESS_SIGNAL_RT19

SIGRT19

Sys::Virt::Domain::PROCESS_SIGNAL_RT20

SIGRT20

Sys::Virt::Domain::PROCESS_SIGNAL_RT21

SIGRT21

Sys::Virt::Domain::PROCESS_SIGNAL_RT22

SIGRT22

Sys::Virt::Domain::PROCESS_SIGNAL_RT23

SIGRT23

Sys::Virt::Domain::PROCESS_SIGNAL_RT24

SIGRT24

Sys::Virt::Domain::PROCESS_SIGNAL_RT25

SIGRT25

Sys::Virt::Domain::PROCESS_SIGNAL_RT26

SIGRT26

Sys::Virt::Domain::PROCESS_SIGNAL_RT27

SIGRT27

Sys::Virt::Domain::PROCESS_SIGNAL_RT28

SIGRT28

Sys::Virt::Domain::PROCESS_SIGNAL_RT29

SIGRT29

Sys::Virt::Domain::PROCESS_SIGNAL_RT30

SIGRT30

Sys::Virt::Domain::PROCESS_SIGNAL_RT31

SIGRT31

Sys::Virt::Domain::PROCESS_SIGNAL_RT32

SIGRT32

DOMAIN TUNABLE CONSTANTS

The following constants are useful when accessing domain tuning parameters in APIs and events

Sys::Virt::Domain::TUNABLE_CPU_CPU_SHARES

Proportional CPU weight

Sys::Virt::Domain::TUNABLE_CPU_EMULATORPIN

Emulator thread CPU pinning mask

Sys::Virt::Domain::TUNABLE_CPU_EMULATOR_PERIOD

Emulator thread CPU period

Sys::Virt::Domain::TUNABLE_CPU_EMULATOR_QUOTA

Emulator thread CPU quota

Sys::Virt::Domain::TUNABLE_CPU_IOTHREAD_PERIOD

Iothread thread CPU period

Sys::Virt::Domain::TUNABLE_CPU_IOTHREAD_QUOTA

Iothread thread CPU quota

Sys::Virt::Domain::TUNABLE_CPU_VCPUPIN

VCPU thread pinning mask

Sys::Virt::Domain::TUNABLE_CPU_VCPU_PERIOD

VCPU thread period

Sys::Virt::Domain::TUNABLE_CPU_VCPU_QUOTA

VCPU thread quota

Sys::Virt::Domain::TUNABLE_CPU_GLOBAL_PERIOD

VM global period

Sys::Virt::Domain::TUNABLE_CPU_GLOBAL_QUOTA

VM global quota

Sys::Virt::Domain::TUNABLE_BLKDEV_DISK

The name of guest disks

Sys::Virt::Domain::TUNABLE_BLKDEV_READ_BYTES_SEC

Read throughput in bytes per sec

Sys::Virt::Domain::TUNABLE_BLKDEV_READ_IOPS_SEC

Read throughput in I/O operations per sec

Sys::Virt::Domain::TUNABLE_BLKDEV_TOTAL_BYTES_SEC

Total throughput in bytes per sec

Sys::Virt::Domain::TUNABLE_BLKDEV_TOTAL_IOPS_SEC

Total throughput in I/O operations per sec

Sys::Virt::Domain::TUNABLE_BLKDEV_WRITE_BYTES_SEC

Write throughput in bytes per sec

Sys::Virt::Domain::TUNABLE_BLKDEV_WRITE_IOPS_SEC

Write throughput in I/O operations per sec

Sys::Virt::Domain::TUNABLE_BLKDEV_READ_BYTES_SEC_MAX

Maximum read throughput in bytes per sec

Sys::Virt::Domain::TUNABLE_BLKDEV_READ_IOPS_SEC_MAX

Maximum read throughput in I/O operations per sec

Sys::Virt::Domain::TUNABLE_BLKDEV_TOTAL_BYTES_SEC_MAX

Maximum total throughput in bytes per sec

Sys::Virt::Domain::TUNABLE_BLKDEV_TOTAL_IOPS_SEC_MAX

Maximum total throughput in I/O operations per sec

Sys::Virt::Domain::TUNABLE_BLKDEV_WRITE_BYTES_SEC_MAX

Maximum write throughput in bytes per sec

Sys::Virt::Domain::TUNABLE_BLKDEV_WRITE_IOPS_SEC_MAX

Maximum write throughput in I/O operations per sec

Sys::Virt::Domain::TUNABLE_BLKDEV_SIZE_IOPS_SEC

The maximum I/O operations per second

Sys::Virt::Domain::TUNABLE_BLKDEV_TOTAL_BYTES_SEC_MAX_LENGTH

The duration in seconds allowed for maximum total bytes processed per second.

Sys::Virt::Domain::TUNABLE_BLKDEV_READ_BYTES_SEC_MAX_LENGTH

The duration in seconds allowed for maximum bytes read per second.

Sys::Virt::Domain::TUNABLE_BLKDEV_WRITE_BYTES_SEC_MAX_LENGTH

The duration in seconds allowed for maximum bytes written per second.

Sys::Virt::Domain::TUNABLE_BLKDEV_TOTAL_IOPS_SEC_MAX_LENGTH

The duration in seconds allowed for maximum total I/O operations processed per second.

Sys::Virt::Domain::TUNABLE_BLKDEV_READ_IOPS_SEC_MAX_LENGTH

The duration in seconds allowed for maximum I/O operations read per second.

Sys::Virt::Domain::TUNABLE_BLKDEV_WRITE_IOPS_SEC_MAX_LENGTH

The duration in seconds allowed for maximum I/O operations written per second.

Sys::Virt::Domain::TUNABLE_BLKDEV_GROUP_NAME

The name of the blkdev group

Sys::Virt::Domain::TUNABLE_IOTHREADSPIN

The I/O threads pinning

DOMAIN LIFECYCLE CONSTANTS

The following constants are useful when setting action for lifecycle events.

Sys::Virt::Domain::LIFECYCLE_POWEROFF

The poweroff lifecycle event type

Sys::Virt::Domain::LIFECYCLE_REBOOT

The reboot lifecycle event type

Sys::Virt::Domain::LIFECYCLE_CRASH

The crash lifecycle event type

DOMAIN LIFECYCLE ACTION CONSTANTS

Sys::Virt::Domain::LIFECYCLE_ACTION_DESTROY

The destroy lifecycle action

Sys::Virt::Domain::LIFECYCLE_ACTION_RESTART

The restart lifecycle action

Sys::Virt::Domain::LIFECYCLE_ACTION_RESTART_RENAME

The restart-rename lifecycle action

Sys::Virt::Domain::LIFECYCLE_ACTION_PRESERVE

The preserve lifecycle action

Sys::Virt::Domain::LIFECYCLE_ACTION_COREDUMP_DESTROY

The coredump-destroy lifecycle action

Sys::Virt::Domain::LIFECYCLE_ACTION_COREDUMP_RESTART

The coredump-restart lifecycle action

MEMORY FAILURE ACTION CONSTANTS

Sys::Virt::Domain::EVENT_MEMORY_FAILURE_ACTION_IGNORE

The failure could be ignored

Sys::Virt::Domain::EVENT_MEMORY_FAILURE_ACTION_INJECT

An MCE was injected to the guest

Sys::Virt::Domain::EVENT_MEMORY_FAILURE_ACTION_FATAL

The failure is non-recoverable and the hypervisor was not able to handle it

Sys::Virt::Domain::EVENT_MEMORY_FAILURE_ACTION_RESET

The failure is non-recoverable and the guest was not able to handle it.

MEMORY FAILURE RECIPIENT CONSTANTS

Sys::Virt::Domain::EVENT_MEMORY_FAILURE_RECIPIENT_HYPERVISOR

The memory failure was in hypervisor address space

Sys::Virt::Domain::EVENT_MEMORY_FAILURE_RECIPIENT_GUEST

The memory failure was in guest address space

MEMORY FAILURE FLAG CONSTANTS

Sys::Virt::Domain::MEMORY_FAILURE_ACTION_REQUIRED

Whether the flag is action-required or action-optional

Sys::Virt::Domain::MEMORY_FAILURE_RECURSIVE

The failure occurred while the previous fault was being handled.

MEMORY DIRTY RATE STATUS CONSTANTS

Sys::Virt::Domain::DIRTYRATE_UNSTARTED

The dirty rate is not being measured currently.

Sys::Virt::Domain::DIRTYRATE_MEASURING

The dity rate is in the process of being measured

Sys::Virt::Domain::DIRTYRATE_MEASURED

The dirty rate has been measured

AUTHORS

Daniel P. Berrange <berrange@redhat.com>

COPYRIGHT

Copyright (C) 2006 Red Hat Copyright (C) 2006-2007 Daniel P. Berrange

LICENSE

This program is free software; you can redistribute it and/or modify it under the terms of either the GNU General Public License as published by the Free Software Foundation (either version 2 of the License, or at your option any later version), or, the Artistic License, as specified in the Perl README file.

SEE ALSO

Sys::Virt, Sys::Virt::Error, http://libvirt.org

cpanm Sys::Virt

perl -MCPAN -e shell
install Sys::Virt