NAME

Search::Elasticsearch::Client::5_0::Direct::Cluster - A client for running cluster-level requests

VERSION

version 5.01

DESCRIPTION

This module provides methods to make cluster-level requests, such as getting and setting cluster-level settings, manually rerouting shards, and retrieving for monitoring purposes.

It does Search::Elasticsearch::Role::Client::Direct.

METHODS

health()

    $response = $e->cluster->health(
        index   => 'index' | \@indices  # optional
    );

The health() method is used to retrieve information about the cluster health, returning red, yellow or green to indicate the state of the cluster, indices or shards.

Query string parameters: level, local, master_timeout, timeout, wait_for_active_shards, wait_for_events, wait_for_no_relocating_shards, wait_for_nodes, wait_for_status

See the cluster health docs for more information.

stats()

    $response = $e->cluster->stats(
        node_id => 'node' | \@nodes     # optional
    );

Returns high-level cluster stats, optionally limited to the listed nodes.

Query string parameters: flat_settings, human, timeout

See the cluster stats docs for more information.

get_settings()

    $response = $e->cluster->get_settings()

The get_settings() method is used to retrieve cluster-wide settings that have been set with the "put_settings()" method.

Query string parameters: flat_settings, include_defaults, master_timeout, timeout

See the cluster settings docs for more information.

put_settings()

    $response = $e->cluster->put_settings( %settings );

The put_settings() method is used to set cluster-wide settings, either transiently (which don't survive restarts) or permanently (which do survive restarts).

For instance:

    $response = $e->cluster->put_settings(
        body => {
            transient => { "discovery.zen.minimum_master_nodes" => 5 }
        }
    );

Query string parameters: flat_settings

See the cluster settings docs for more information.

state()

    $response = $e->cluster->state(
        metric => $metric | \@metrics   # optional
        index  => $index  | \@indices   # optional
    );

The state() method returns the current cluster state from the master node, or from the responding node if local is set to true.

It returns all metrics by default, but these can be limited to any of: _all, blocks, metadata, nodes, routing_table

Metrics for indices can be limited to particular indices with the index parameter.

Query string parameters: allow_no_indices, expand_wildcards, flat_settings, ignore_unavailable, local, master_timeout

See the cluster state docs for more information.

allocation_explain()

    $response = $e->cluster->allocation_explain(
        body => { ... shard selectors ...}  # optional
    );

Returns information about why a shard is allocated or unallocated or why.

Query string parameters: include_disk_info, include_yes_decisions

See the cluster allocation explain docs for more information.

pending_tasks()

    $response = $e->cluster->pending_tasks();

Returns a list of cluster-level tasks still pending on the master node.

Query string parameters: local, master_timeout

See the pending tasks docs for more information.

reroute()

    $e->cluster->reroute(
        body => { commands }
    );

The reroute() method is used to manually reallocate shards from one node to another. The body should contain the commands indicating which changes should be made. For instance:

    $e->cluster->reroute(
        body => {
            commands => [
                { move => {
                    index     => 'test',
                    shard     => 0,
                    from_node => 'node_1',
                    to_node   => 'node_2
                }},
                { allocate => {
                    index     => 'test',
                    shard     => 1,
                    node      => 'node_3'
                }}
            ]
        }
    );

Query string parameters: dry_run, explain, master_timeout, metric, retry_failed, timeout

See the reroute docs for more information.

AUTHOR

Clinton Gormley <drtech@cpan.org>

COPYRIGHT AND LICENSE

This software is Copyright (c) 2016 by Elasticsearch BV.

This is free software, licensed under:

  The Apache License, Version 2.0, January 2004

cpanm Search::Elasticsearch

perl -MCPAN -e shell
install Search::Elasticsearch