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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.metadata;
import org.elasticsearch.Version;
import org.elasticsearch.cluster.ClusterName;
import org.elasticsearch.cluster.ClusterState;
import org.elasticsearch.cluster.EmptyClusterInfoService;
import org.elasticsearch.cluster.block.ClusterBlocks;
import org.elasticsearch.cluster.node.DiscoveryNode;
import org.elasticsearch.cluster.node.DiscoveryNodes;
import org.elasticsearch.cluster.routing.RoutingTable;
import org.elasticsearch.cluster.routing.ShardRoutingState;
import org.elasticsearch.cluster.routing.allocation.AllocationService;
import org.elasticsearch.cluster.routing.allocation.allocator.BalancedShardsAllocator;
import org.elasticsearch.cluster.routing.allocation.decider.AllocationDeciders;
import org.elasticsearch.cluster.routing.allocation.decider.MaxRetryAllocationDecider;
import org.elasticsearch.common.Strings;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.index.IndexNotFoundException;
import org.elasticsearch.ResourceAlreadyExistsException;
import org.elasticsearch.indices.InvalidIndexNameException;
import org.elasticsearch.test.ESTestCase;
import org.elasticsearch.test.VersionUtils;
import org.elasticsearch.test.gateway.TestGatewayAllocator;
import java.util.Arrays;
import java.util.Collections;
import java.util.HashSet;
import java.util.List;
import static java.util.Collections.emptyMap;
import static java.util.Collections.min;
import static org.hamcrest.Matchers.endsWith;
public class MetaDataCreateIndexServiceTests extends ESTestCase {
private ClusterState createClusterState(String name, int numShards, int numReplicas, Settings settings) {
MetaData.Builder metaBuilder = MetaData.builder();
IndexMetaData indexMetaData = IndexMetaData.builder(name).settings(settings(Version.CURRENT)
.put(settings))
.numberOfShards(numShards).numberOfReplicas(numReplicas).build();
metaBuilder.put(indexMetaData, false);
MetaData metaData = metaBuilder.build();
RoutingTable.Builder routingTableBuilder = RoutingTable.builder();
routingTableBuilder.addAsNew(metaData.index(name));
RoutingTable routingTable = routingTableBuilder.build();
ClusterState clusterState = ClusterState.builder(org.elasticsearch.cluster.ClusterName.CLUSTER_NAME_SETTING
.getDefault(Settings.EMPTY))
.metaData(metaData).routingTable(routingTable).blocks(ClusterBlocks.builder().addBlocks(indexMetaData)).build();
return clusterState;
}
public static boolean isShrinkable(int source, int target) {
int x = source / target;
assert source > target : source + " <= " + target;
return target * x == source;
}
public void testValidateShrinkIndex() {
int numShards = randomIntBetween(2, 42);
ClusterState state = createClusterState("source", numShards, randomIntBetween(0, 10),
Settings.builder().put("index.blocks.write", true).build());
assertEquals("index [source] already exists",
expectThrows(ResourceAlreadyExistsException.class, () ->
MetaDataCreateIndexService.validateShrinkIndex(state, "target", Collections.emptySet(), "source", Settings.EMPTY)
).getMessage());
assertEquals("no such index",
expectThrows(IndexNotFoundException.class, () ->
MetaDataCreateIndexService.validateShrinkIndex(state, "no such index", Collections.emptySet(), "target", Settings.EMPTY)
).getMessage());
assertEquals("can't shrink an index with only one shard",
expectThrows(IllegalArgumentException.class, () -> MetaDataCreateIndexService.validateShrinkIndex(createClusterState("source",
1, 0, Settings.builder().put("index.blocks.write", true).build()), "source", Collections.emptySet(),
"target", Settings.EMPTY)
).getMessage());
assertEquals("the number of target shards must be less that the number of source shards",
expectThrows(IllegalArgumentException.class, () -> MetaDataCreateIndexService.validateShrinkIndex(createClusterState("source",
5, 0, Settings.builder().put("index.blocks.write", true).build()), "source", Collections.emptySet(),
"target", Settings.builder().put("index.number_of_shards", 10).build())
).getMessage());
assertEquals("index source must be read-only to shrink index. use \"index.blocks.write=true\"",
expectThrows(IllegalStateException.class, () ->
MetaDataCreateIndexService.validateShrinkIndex(
createClusterState("source", randomIntBetween(2, 100), randomIntBetween(0, 10), Settings.EMPTY)
, "source", Collections.emptySet(), "target", Settings.EMPTY)
).getMessage());
assertEquals("index source must have all shards allocated on the same node to shrink index",
expectThrows(IllegalStateException.class, () ->
MetaDataCreateIndexService.validateShrinkIndex(state, "source", Collections.emptySet(), "target", Settings.EMPTY)
).getMessage());
assertEquals("the number of source shards [8] must be a must be a multiple of [3]",
expectThrows(IllegalArgumentException.class, () ->
MetaDataCreateIndexService.validateShrinkIndex(createClusterState("source", 8, randomIntBetween(0, 10),
Settings.builder().put("index.blocks.write", true).build()), "source", Collections.emptySet(), "target",
Settings.builder().put("index.number_of_shards", 3).build())
).getMessage());
assertEquals("mappings are not allowed when shrinking indices, all mappings are copied from the source index",
expectThrows(IllegalArgumentException.class, () -> {
MetaDataCreateIndexService.validateShrinkIndex(state, "source", Collections.singleton("foo"),
"target", Settings.EMPTY);
}
).getMessage());
// create one that won't fail
ClusterState clusterState = ClusterState.builder(createClusterState("source", numShards, 0,
Settings.builder().put("index.blocks.write", true).build())).nodes(DiscoveryNodes.builder().add(newNode("node1")))
.build();
AllocationService service = new AllocationService(Settings.builder().build(), new AllocationDeciders(Settings.EMPTY,
Collections.singleton(new MaxRetryAllocationDecider(Settings.EMPTY))),
new TestGatewayAllocator(), new BalancedShardsAllocator(Settings.EMPTY), EmptyClusterInfoService.INSTANCE);
RoutingTable routingTable = service.reroute(clusterState, "reroute").routingTable();
clusterState = ClusterState.builder(clusterState).routingTable(routingTable).build();
// now we start the shard
routingTable = service.applyStartedShards(clusterState,
routingTable.index("source").shardsWithState(ShardRoutingState.INITIALIZING)).routingTable();
clusterState = ClusterState.builder(clusterState).routingTable(routingTable).build();
int targetShards;
do {
targetShards = randomIntBetween(1, numShards/2);
} while (isShrinkable(numShards, targetShards) == false);
MetaDataCreateIndexService.validateShrinkIndex(clusterState, "source", Collections.emptySet(), "target",
Settings.builder().put("index.number_of_shards", targetShards).build());
}
public void testShrinkIndexSettings() {
String indexName = randomAsciiOfLength(10);
List<Version> versions = Arrays.asList(VersionUtils.randomVersion(random()), VersionUtils.randomVersion(random()),
VersionUtils.randomVersion(random()));
versions.sort((l, r) -> Long.compare(l.id, r.id));
Version version = versions.get(0);
Version minCompat = versions.get(1);
Version upgraded = versions.get(2);
// create one that won't fail
ClusterState clusterState = ClusterState.builder(createClusterState(indexName, randomIntBetween(2, 10), 0,
Settings.builder()
.put("index.blocks.write", true)
.put("index.similarity.default.type", "BM25")
.put("index.version.created", version)
.put("index.version.upgraded", upgraded)
.put("index.version.minimum_compatible", minCompat.luceneVersion)
.put("index.analysis.analyzer.my_analyzer.tokenizer", "keyword")
.build())).nodes(DiscoveryNodes.builder().add(newNode("node1")))
.build();
AllocationService service = new AllocationService(Settings.builder().build(), new AllocationDeciders(Settings.EMPTY,
Collections.singleton(new MaxRetryAllocationDecider(Settings.EMPTY))),
new TestGatewayAllocator(), new BalancedShardsAllocator(Settings.EMPTY), EmptyClusterInfoService.INSTANCE);
RoutingTable routingTable = service.reroute(clusterState, "reroute").routingTable();
clusterState = ClusterState.builder(clusterState).routingTable(routingTable).build();
// now we start the shard
routingTable = service.applyStartedShards(clusterState,
routingTable.index(indexName).shardsWithState(ShardRoutingState.INITIALIZING)).routingTable();
clusterState = ClusterState.builder(clusterState).routingTable(routingTable).build();
Settings.Builder builder = Settings.builder();
MetaDataCreateIndexService.prepareShrinkIndexSettings(
clusterState, Collections.emptySet(), builder, clusterState.metaData().index(indexName).getIndex(), "target");
assertEquals("similarity settings must be copied", "BM25", builder.build().get("index.similarity.default.type"));
assertEquals("analysis settings must be copied",
"keyword", builder.build().get("index.analysis.analyzer.my_analyzer.tokenizer"));
assertEquals("node1", builder.build().get("index.routing.allocation.initial_recovery._id"));
assertEquals("1", builder.build().get("index.allocation.max_retries"));
assertEquals(version, builder.build().getAsVersion("index.version.created", null));
assertEquals(upgraded, builder.build().getAsVersion("index.version.upgraded", null));
}
private DiscoveryNode newNode(String nodeId) {
return new DiscoveryNode(nodeId, buildNewFakeTransportAddress(), emptyMap(),
Collections.unmodifiableSet(new HashSet<>(Arrays.asList(DiscoveryNode.Role.MASTER, DiscoveryNode.Role.DATA))), Version.CURRENT);
}
public void testValidateIndexName() throws Exception {
validateIndexName("index?name", "must not contain the following characters " + Strings.INVALID_FILENAME_CHARS);
validateIndexName("index#name", "must not contain '#'");
validateIndexName("_indexname", "must not start with '_', '-', or '+'");
validateIndexName("-indexname", "must not start with '_', '-', or '+'");
validateIndexName("+indexname", "must not start with '_', '-', or '+'");
validateIndexName("INDEXNAME", "must be lowercase");
validateIndexName("..", "must not be '.' or '..'");
}
private void validateIndexName(String indexName, String errorMessage) {
InvalidIndexNameException e = expectThrows(InvalidIndexNameException.class,
() -> MetaDataCreateIndexService.validateIndexName(indexName, ClusterState.builder(ClusterName.CLUSTER_NAME_SETTING
.getDefault(Settings.EMPTY)).build()));
assertThat(e.getMessage(), endsWith(errorMessage));
}
}
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