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Fail allocation of new primaries in empty cluster (#43284)
Today if you create an index in a cluster without any data nodes then it will report yellow health because it never attempts to assign any shards if there are no data nodes, so the new shards remain at `AllocationStatus.NO_ATTEMPT`. This commit moves the new primaries to `AllocationStatus.DECIDERS_NO` in this situation, causing the cluster health to move to red. Fixes #41073
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server/src/test/java/org/elasticsearch/cluster/health/ClusterHealthAllocationTests.java
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| /* | ||
| * 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.health; | ||
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| import org.elasticsearch.Version; | ||
| import org.elasticsearch.cluster.ClusterName; | ||
| import org.elasticsearch.cluster.ClusterState; | ||
| import org.elasticsearch.cluster.ESAllocationTestCase; | ||
| import org.elasticsearch.cluster.metadata.IndexMetaData; | ||
| import org.elasticsearch.cluster.metadata.MetaData; | ||
| import org.elasticsearch.cluster.node.DiscoveryNodeRole; | ||
| import org.elasticsearch.cluster.node.DiscoveryNodes; | ||
| import org.elasticsearch.cluster.routing.RoutingTable; | ||
| import org.elasticsearch.cluster.routing.allocation.AllocationService; | ||
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|
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| import java.util.Collections; | ||
|
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| public class ClusterHealthAllocationTests extends ESAllocationTestCase { | ||
|
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| public void testClusterHealth() { | ||
| ClusterState clusterState = ClusterState.builder(ClusterName.DEFAULT).build(); | ||
| if (randomBoolean()) { | ||
| clusterState = addNode(clusterState, "node_m", true); | ||
| } | ||
| assertEquals(ClusterHealthStatus.GREEN, getClusterHealthStatus(clusterState)); | ||
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| MetaData metaData = MetaData.builder() | ||
| .put(IndexMetaData.builder("test") | ||
| .settings(settings(Version.CURRENT)) | ||
| .numberOfShards(2) | ||
| .numberOfReplicas(1)) | ||
| .build(); | ||
| RoutingTable routingTable = RoutingTable.builder().addAsNew(metaData.index("test")).build(); | ||
| clusterState = ClusterState.builder(clusterState).metaData(metaData).routingTable(routingTable).build(); | ||
| MockAllocationService allocation = createAllocationService(); | ||
| clusterState = applyStartedShardsUntilNoChange(clusterState, allocation); | ||
| assertEquals(0, clusterState.nodes().getDataNodes().size()); | ||
| assertEquals(ClusterHealthStatus.RED, getClusterHealthStatus(clusterState)); | ||
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| clusterState = addNode(clusterState, "node_d1", false); | ||
| assertEquals(1, clusterState.nodes().getDataNodes().size()); | ||
| clusterState = applyStartedShardsUntilNoChange(clusterState, allocation); | ||
| assertEquals(ClusterHealthStatus.YELLOW, getClusterHealthStatus(clusterState)); | ||
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| clusterState = addNode(clusterState, "node_d2", false); | ||
| clusterState = applyStartedShardsUntilNoChange(clusterState, allocation); | ||
| assertEquals(ClusterHealthStatus.GREEN, getClusterHealthStatus(clusterState)); | ||
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| clusterState = removeNode(clusterState, "node_d1", allocation); | ||
| assertEquals(ClusterHealthStatus.YELLOW, getClusterHealthStatus(clusterState)); | ||
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| clusterState = removeNode(clusterState, "node_d2", allocation); | ||
| assertEquals(ClusterHealthStatus.RED, getClusterHealthStatus(clusterState)); | ||
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| routingTable = RoutingTable.builder(routingTable).remove("test").build(); | ||
| metaData = MetaData.builder(clusterState.metaData()).remove("test").build(); | ||
| clusterState = ClusterState.builder(clusterState).routingTable(routingTable).metaData(metaData).build(); | ||
| assertEquals(0, clusterState.nodes().getDataNodes().size()); | ||
| assertEquals(ClusterHealthStatus.GREEN, getClusterHealthStatus(clusterState)); | ||
| } | ||
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| private ClusterState addNode(ClusterState clusterState, String nodeName, boolean isMaster) { | ||
| DiscoveryNodes.Builder nodeBuilder = DiscoveryNodes.builder(clusterState.getNodes()); | ||
| nodeBuilder.add(newNode(nodeName, Collections.singleton(isMaster ? DiscoveryNodeRole.MASTER_ROLE : DiscoveryNodeRole.DATA_ROLE))); | ||
| return ClusterState.builder(clusterState).nodes(nodeBuilder).build(); | ||
| } | ||
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| private ClusterState removeNode(ClusterState clusterState, String nodeName, AllocationService allocationService) { | ||
| return allocationService.disassociateDeadNodes(ClusterState.builder(clusterState) | ||
| .nodes(DiscoveryNodes.builder(clusterState.getNodes()).remove(nodeName)).build(), true, "reroute"); | ||
| } | ||
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| private ClusterHealthStatus getClusterHealthStatus(ClusterState clusterState) { | ||
| return new ClusterStateHealth(clusterState).getStatus(); | ||
| } | ||
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| } |