NAME
Plack::App::ServiceStatus - Check and report status of various services needed by your app
VERSION
version 0.905
SYNOPSIS
# using Plack::Builder with Plack::App::URLMap
use Plack::Builder;
use Plack::App::ServiceStatus;
my $status_app = Plack::App::ServiceStatus->new(
app => 'your app',
version => '1.42',
DBIC => [ $schema, 'select 1' ],
Elasticsearch => $es, # instance of Search::Elasticsearch
);
builder {
mount "/_status" => $status_app;
mount "/" => $your_app;
};
# using OX
router as {
mount '/_status' => 'Plack::App::ServiceStatus' => (
app => literal(__PACKAGE__),
Redis => 'redis',
'+MyApp::ServiceStatus' => {
foo => literal("foo")
},
);
route '/some/endpoint' => 'some_controller.some_action';
# ...
};
# checking the status
curl http://localhost:3000/_status | json_pp
{
"app" : "Your app",
"version": "1.42",
"started_at" : 1465823638,
"uptime" : 42,
"checks" : [
{
"status" : "ok",
"name" : "Your app"
},
{
"name" : "Elasticsearch",
"status" : "ok"
},
{
"name" : "DBIC",
"status" : "ok"
}
]
}
DESCRIPTION
Plack::App::ServiceStatus
implements a small Plack application that you can use to get some status info about your application and the services needed by it.
You can then use some monitoring software to periodically check if your app is running and has access to all needed services.
Checks
The following checks are currently available:
Each check consists of a name
and a status
. The status can be ok
or nok
. A check might also contain a message
, which should be some description of the error or problem if the status is nok
.
Each check has to implement a method named check
which will be called with name of the class and the arguments you specified when setting up Plack::App::ServiceStatus
. check
has to return either the string ok
, or the string nok
and a string containing an explanation.
You can add your own checks by specifying a name starting with a +
sign, for example +My::App::SomeStatusCheck
. Or send me a pull request to include your check in this distribution, or just release it yourself!
Weirdness
The slightly strange way Plack::App::ServiceStatus
is initiated is caused by the way OX works.
Plack::App::ServiceStatus
is not implemented as a middleware on purpose. While middlewares are great for a lot of use cases, I think that here an embedded app is the better fit.
TODO
tests
make sure the app is only initiated once when running in OX
THANKS
Thanks to
validad.com for funding the development of this code.
<Manfred Stock|https://github.com/mstock> for adding Net::Stomp and a Icinga/Nagios check script.
AUTHOR
Thomas Klausner <domm@plix.at>
COPYRIGHT AND LICENSE
This software is copyright (c) 2016 - 2022 by Thomas Klausner.
This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.