/ 
Search-Elasticsearch-7.712
River stage two • 40 direct dependents • 55 total dependents
/ Search::Elasticsearch::Role::CxnPool::Sniff

NAME

Search::Elasticsearch::Role::CxnPool::Sniff - A CxnPool role for connecting to a local cluster with a dynamic node list

VERSION

version 7.712

CONFIGURATION

sniff_interval

How often should we perform a sniff in order to detect whether new nodes have been added to the cluster. Defaults to `300` seconds.

sniff_max_content_length

Whether we should set the max_content_length dynamically while sniffing. Defaults to true unless a fixed max_content_length was specified.

METHODS

schedule_check()

$cxn_pool->schedule_check

Schedules a sniff before the next request is processed.

parse_sniff()

$bool = $cxn_pool->parse_sniff(\%nodes);

Parses the response from a sniff request and extracts the hostname/ip of all listed nodes, filtered through "should_accept_node()". If any live nodes are found, they are passed to "set_cxns()" in Search::Elasticsearch::Role::CxnPool. The max_content_length is also detected if "sniff_max_content_length" is true.

should_accept_node()

$host = $cxn_pool->should_accept_node($host,$node_id,\%node_data)

This method serves as a hook which can be overridden by the user. When a sniff is performed, this method is called with the host (eg 192.168.5.100:9200), the node_id (the ID assigned to the node by Elasticsearch) and the node_data which contains the information about the node that Elasticsearch has returned, eg:

{
    "transport_address" => "inet[192.168.5.100/192.168.5.100:9300]",
    "http" : {
       "publish_address"    => "inet[/192.168.5.100:9200]",
       "max_content_length" => "100mb",
       "bound_address"      => "inet[/0:0:0:0:0:0:0:0:9200]",
       "max_content_length_in_bytes" : 104857600
    },
    "version"       => "0.90.4",
    "name"          => "Silver Sable",
    "hostname"      => "search1.domain.com",
    "http_address"  => "inet[/192.168.5.100:9200]"
}

If the node should be accepted (ie used to serve data), then it should return the host value to use. By default, nodes are always accepted.

AUTHOR

Enrico Zimuel <enrico.zimuel@elastic.co>

COPYRIGHT AND LICENSE

This software is Copyright (c) 2021 by Elasticsearch BV.

This is free software, licensed under:

The Apache License, Version 2.0, January 2004