lib/Search/Elasticsearch/Client/7_0/Direct/Cluster.pm

# Licensed to Elasticsearch B.V. under one or more contributor
# license agreements. See the NOTICE file distributed with
# this work for additional information regarding copyright
# ownership. Elasticsearch B.V. licenses this file to you under
# the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#   http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied.  See the License for the
# specific language governing permissions and limitations
# under the License.

package Search::Elasticsearch::Client::7_0::Direct::Cluster;

use Moo;
with 'Search::Elasticsearch::Client::7_0::Role::API';
with 'Search::Elasticsearch::Role::Client::Direct';
__PACKAGE__->_install_api('cluster');

1;

__END__

# ABSTRACT: A client for running cluster-level requests

=head1 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 L<Search::Elasticsearch::Role::Client::Direct>.

=head1 METHODS

=head2 C<health()>

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

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

Query string parameters:
    C<error_trace>,
    C<human>,
    C<level>,
    C<local>,
    C<master_timeout>,
    C<timeout>,
    C<wait_for_active_shards>,
    C<wait_for_events>,
    C<wait_for_no_initializing_shards>,
    C<wait_for_no_relocating_shards>,
    C<wait_for_nodes>,
    C<wait_for_status>

See the L<cluster health docs|http://www.elastic.co/guide/en/elasticsearch/reference/current/cluster-health.html>
for more information.

=head2 C<stats()>

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

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

Query string parameters:
    C<error_trace>,
    C<flat_settings>,
    C<human>,
    C<timeout>

See the L<cluster stats docs|http://www.elastic.co/guide/en/elasticsearch/reference/current/cluster-stats.html>
for more information.

=head2 C<get_settings()>

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

The C<get_settings()> method is used to retrieve cluster-wide settings that
have been set with the L</put_settings()> method.

Query string parameters:
    C<error_trace>,
    C<flat_settings>,
    C<human>,
    C<include_defaults>,
    C<master_timeout>,
    C<timeout>

See the L<cluster settings docs|http://www.elastic.co/guide/en/elasticsearch/reference/current/cluster-update-settings.html>
for more information.

=head2 C<put_settings()>

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

The C<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" => 6 }
        }
    );

Query string parameters:
    C<error_trace>,
    C<flat_settings>,
    C<human>

See the L<cluster settings docs|http://www.elastic.co/guide/en/elasticsearch/reference/current/cluster-update-settings.html>
 for more information.

=head2 C<state()>

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

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

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

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

Query string parameters:
    C<allow_no_indices>,
    C<error_trace>,
    C<expand_wildcards>,
    C<flat_settings>,
    C<human>,
    C<ignore_unavailable>,
    C<local>,
    C<master_timeout>,
    C<wait_for_metadata_version>,
    C<wait_for_timeout>

See the L<cluster state docs|http://www.elastic.co/guide/en/elasticsearch/reference/current/cluster-state.html>
for more information.

=head2 C<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:
    C<error_trace>,
    C<human>,
    C<include_disk_info>,
    C<include_yes_decisions>

See the L<cluster allocation explain docs|https://www.elastic.co/guide/en/elasticsearch/reference/current/cluster-allocation-explain.html>
for more information.

=head2 C<pending_tasks()>

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

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

Query string parameters:
    C<error_trace>,
    C<human>,
    C<local>,
    C<master_timeout>

See the L<pending tasks docs|http://www.elastic.co/guide/en/elasticsearch/reference/current/cluster-pending.html>
for more information.

=head2 C<reroute()>

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


The C<reroute()> method is used to manually reallocate shards from one
node to another.  The C<body> should contain the C<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:
    C<dry_run>,
    C<error_trace>,
    C<explain>,
    C<human>,
    C<master_timeout>,
    C<metric>,
    C<retry_failed>,
    C<timeout>

See the L<reroute docs|http://www.elastic.co/guide/en/elasticsearch/reference/current/cluster-reroute.html>
for more information.

=head2 C<remote_info()>

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

The C<remote_info()> API retrieves all of the configured remote cluster information.

Query string parameters:
    C<error_trace>,
    C<human>

See the L<remote_info docs|https://www.elastic.co/guide/en/elasticsearch/reference/current/cluster-remote-info.html>
for more information.