blob: d8042f18a2731a4eb8d499c8baaaf57ea0d5ad67 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
|
/*
* Licensed to Elasticsearch under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch 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 org.elasticsearch.cluster.routing.allocation.decider;
import org.elasticsearch.cluster.routing.ShardRouting;
import org.elasticsearch.cluster.routing.allocation.RoutingAllocation;
import org.elasticsearch.common.settings.Settings;
/**
* Only allow rebalancing when all shards are active within the shard replication group.
*/
public class RebalanceOnlyWhenActiveAllocationDecider extends AllocationDecider {
public static final String NAME = "rebalance_only_when_active";
public RebalanceOnlyWhenActiveAllocationDecider(Settings settings) {
super(settings);
}
@Override
public Decision canRebalance(ShardRouting shardRouting, RoutingAllocation allocation) {
if (!allocation.routingNodes().allReplicasActive(shardRouting.shardId(), allocation.metaData())) {
return allocation.decision(Decision.NO, NAME, "rebalancing can not occur if not all replicas are active in the cluster");
}
return allocation.decision(Decision.YES, NAME, "all replicas are active in the cluster, rebalancing can occur");
}
}
|