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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.gateway;
import org.elasticsearch.Version;
import org.elasticsearch.cluster.ClusterChangedEvent;
import org.elasticsearch.cluster.ClusterState;
import org.elasticsearch.cluster.metadata.IndexMetaData;
import org.elasticsearch.cluster.metadata.MetaData;
import org.elasticsearch.cluster.node.DiscoveryNodes;
import org.elasticsearch.cluster.routing.RoutingTable;
import org.elasticsearch.cluster.routing.allocation.AllocationService;
import org.elasticsearch.cluster.routing.allocation.decider.ClusterRebalanceAllocationDecider;
import org.elasticsearch.test.ESAllocationTestCase;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;
import static java.util.Collections.emptySet;
import static org.elasticsearch.cluster.routing.ShardRoutingState.INITIALIZING;
import static org.elasticsearch.common.settings.Settings.settingsBuilder;
import static org.hamcrest.Matchers.equalTo;
/**
* Test IndexMetaState for master and data only nodes return correct list of indices to write
* There are many parameters:
* - meta state is not in memory
* - meta state is in memory with old version/ new version
* - meta state is in memory with new version
* - version changed in cluster state event/ no change
* - node is data only node
* - node is master eligible
* for data only nodes: shard initializing on shard
*/
public class GatewayMetaStateTests extends ESAllocationTestCase {
ClusterChangedEvent generateEvent(boolean initializing, boolean versionChanged, boolean masterEligible) {
//ridiculous settings to make sure we don't run into uninitialized because fo default
AllocationService strategy = createAllocationService(settingsBuilder()
.put("cluster.routing.allocation.node_concurrent_recoveries", 100)
.put(ClusterRebalanceAllocationDecider.CLUSTER_ROUTING_ALLOCATION_ALLOW_REBALANCE_SETTING.getKey(), "always")
.put("cluster.routing.allocation.cluster_concurrent_rebalance", 100)
.put("cluster.routing.allocation.node_initial_primaries_recoveries", 100)
.build());
ClusterState newClusterState, previousClusterState;
MetaData metaDataOldClusterState = MetaData.builder()
.put(IndexMetaData.builder("test").settings(settings(Version.CURRENT)).numberOfShards(5).numberOfReplicas(2))
.build();
RoutingTable routingTableOldClusterState = RoutingTable.builder()
.addAsNew(metaDataOldClusterState.index("test"))
.build();
// assign all shards
ClusterState init = ClusterState.builder(org.elasticsearch.cluster.ClusterName.DEFAULT)
.metaData(metaDataOldClusterState)
.routingTable(routingTableOldClusterState)
.nodes(generateDiscoveryNodes(masterEligible))
.build();
// new cluster state will have initializing shards on node 1
RoutingTable routingTableNewClusterState = strategy.reroute(init, "reroute").routingTable();
if (initializing == false) {
// pretend all initialized, nothing happened
ClusterState temp = ClusterState.builder(init).routingTable(routingTableNewClusterState).metaData(metaDataOldClusterState).build();
routingTableNewClusterState = strategy.applyStartedShards(temp, temp.getRoutingNodes().shardsWithState(INITIALIZING)).routingTable();
routingTableOldClusterState = routingTableNewClusterState;
} else {
// nothing to do, we have one routing table with unassigned and one with initializing
}
// create new meta data either with version changed or not
MetaData metaDataNewClusterState = MetaData.builder()
.put(init.metaData().index("test"), versionChanged)
.build();
// create the cluster states with meta data and routing tables as computed before
previousClusterState = ClusterState.builder(init)
.metaData(metaDataOldClusterState)
.routingTable(routingTableOldClusterState)
.nodes(generateDiscoveryNodes(masterEligible))
.build();
newClusterState = ClusterState.builder(previousClusterState).routingTable(routingTableNewClusterState).metaData(metaDataNewClusterState).version(previousClusterState.getVersion() + 1).build();
ClusterChangedEvent event = new ClusterChangedEvent("test", newClusterState, previousClusterState);
assertThat(event.state().version(), equalTo(event.previousState().version() + 1));
return event;
}
ClusterChangedEvent generateCloseEvent(boolean masterEligible) {
//ridiculous settings to make sure we don't run into uninitialized because fo default
AllocationService strategy = createAllocationService(settingsBuilder()
.put("cluster.routing.allocation.node_concurrent_recoveries", 100)
.put(ClusterRebalanceAllocationDecider.CLUSTER_ROUTING_ALLOCATION_ALLOW_REBALANCE_SETTING.getKey(), "always")
.put("cluster.routing.allocation.cluster_concurrent_rebalance", 100)
.put("cluster.routing.allocation.node_initial_primaries_recoveries", 100)
.build());
ClusterState newClusterState, previousClusterState;
MetaData metaDataIndexCreated = MetaData.builder()
.put(IndexMetaData.builder("test").settings(settings(Version.CURRENT)).numberOfShards(5).numberOfReplicas(2))
.build();
RoutingTable routingTableIndexCreated = RoutingTable.builder()
.addAsNew(metaDataIndexCreated.index("test"))
.build();
// assign all shards
ClusterState init = ClusterState.builder(org.elasticsearch.cluster.ClusterName.DEFAULT)
.metaData(metaDataIndexCreated)
.routingTable(routingTableIndexCreated)
.nodes(generateDiscoveryNodes(masterEligible))
.build();
RoutingTable routingTableInitializing = strategy.reroute(init, "reroute").routingTable();
ClusterState temp = ClusterState.builder(init).routingTable(routingTableInitializing).build();
RoutingTable routingTableStarted = strategy.applyStartedShards(temp, temp.getRoutingNodes().shardsWithState(INITIALIZING)).routingTable();
// create new meta data either with version changed or not
MetaData metaDataStarted = MetaData.builder()
.put(init.metaData().index("test"), true)
.build();
// create the cluster states with meta data and routing tables as computed before
MetaData metaDataClosed = MetaData.builder()
.put(IndexMetaData.builder("test").settings(settings(Version.CURRENT)).state(IndexMetaData.State.CLOSE).numberOfShards(5).numberOfReplicas(2)).version(metaDataStarted.version() + 1)
.build();
previousClusterState = ClusterState.builder(init)
.metaData(metaDataStarted)
.routingTable(routingTableStarted)
.nodes(generateDiscoveryNodes(masterEligible))
.build();
newClusterState = ClusterState.builder(previousClusterState)
.routingTable(routingTableIndexCreated)
.metaData(metaDataClosed)
.version(previousClusterState.getVersion() + 1).build();
ClusterChangedEvent event = new ClusterChangedEvent("test", newClusterState, previousClusterState);
assertThat(event.state().version(), equalTo(event.previousState().version() + 1));
return event;
}
private DiscoveryNodes.Builder generateDiscoveryNodes(boolean masterEligible) {
Map<String, String> masterNodeAttributes = new HashMap<>();
masterNodeAttributes.put("master", "true");
masterNodeAttributes.put("data", "true");
Map<String, String> dataNodeAttributes = new HashMap<>();
dataNodeAttributes.put("master", "false");
dataNodeAttributes.put("data", "true");
return DiscoveryNodes.builder().put(newNode("node1", masterEligible ? masterNodeAttributes : dataNodeAttributes)).put(newNode("master_node", masterNodeAttributes)).localNodeId("node1").masterNodeId(masterEligible ? "node1" : "master_node");
}
public void assertState(ClusterChangedEvent event,
boolean stateInMemory,
boolean expectMetaData) throws Exception {
MetaData inMemoryMetaData = null;
Set<String> oldIndicesList = emptySet();
if (stateInMemory) {
inMemoryMetaData = event.previousState().metaData();
oldIndicesList = GatewayMetaState.getRelevantIndices(event.previousState(), event.previousState(), oldIndicesList);
}
Set<String> newIndicesList = GatewayMetaState.getRelevantIndices(event.state(),event.previousState(), oldIndicesList);
// third, get the actual write info
Iterator<GatewayMetaState.IndexMetaWriteInfo> indices = GatewayMetaState.resolveStatesToBeWritten(oldIndicesList, newIndicesList, inMemoryMetaData, event.state().metaData()).iterator();
if (expectMetaData) {
assertThat(indices.hasNext(), equalTo(true));
assertThat(indices.next().getNewMetaData().getIndex(), equalTo("test"));
assertThat(indices.hasNext(), equalTo(false));
} else {
assertThat(indices.hasNext(), equalTo(false));
}
}
public void testVersionChangeIsAlwaysWritten() throws Exception {
// test that version changes are always written
boolean initializing = randomBoolean();
boolean versionChanged = true;
boolean stateInMemory = randomBoolean();
boolean masterEligible = randomBoolean();
boolean expectMetaData = true;
ClusterChangedEvent event = generateEvent(initializing, versionChanged, masterEligible);
assertState(event, stateInMemory, expectMetaData);
}
public void testNewShardsAlwaysWritten() throws Exception {
// make sure new shards on data only node always written
boolean initializing = true;
boolean versionChanged = randomBoolean();
boolean stateInMemory = randomBoolean();
boolean masterEligible = false;
boolean expectMetaData = true;
ClusterChangedEvent event = generateEvent(initializing, versionChanged, masterEligible);
assertState(event, stateInMemory, expectMetaData);
}
public void testAllUpToDateNothingWritten() throws Exception {
// make sure state is not written again if we wrote already
boolean initializing = false;
boolean versionChanged = false;
boolean stateInMemory = true;
boolean masterEligible = randomBoolean();
boolean expectMetaData = false;
ClusterChangedEvent event = generateEvent(initializing, versionChanged, masterEligible);
assertState(event, stateInMemory, expectMetaData);
}
public void testNoWriteIfNothingChanged() throws Exception {
boolean initializing = false;
boolean versionChanged = false;
boolean stateInMemory = true;
boolean masterEligible = randomBoolean();
boolean expectMetaData = false;
ClusterChangedEvent event = generateEvent(initializing, versionChanged, masterEligible);
ClusterChangedEvent newEventWithNothingChanged = new ClusterChangedEvent("test cluster state", event.state(), event.state());
assertState(newEventWithNothingChanged, stateInMemory, expectMetaData);
}
public void testWriteClosedIndex() throws Exception {
// test that the closing of an index is written also on data only node
boolean masterEligible = randomBoolean();
boolean expectMetaData = true;
boolean stateInMemory = true;
ClusterChangedEvent event = generateCloseEvent(masterEligible);
assertState(event, stateInMemory, expectMetaData);
}
}
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