/*
* 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.Version;
import org.elasticsearch.cluster.ClusterInfo;
import org.elasticsearch.cluster.ClusterInfoService;
import org.elasticsearch.cluster.ClusterName;
import org.elasticsearch.cluster.ClusterState;
import org.elasticsearch.cluster.DiskUsage;
import org.elasticsearch.cluster.ESAllocationTestCase;
import org.elasticsearch.cluster.MockInternalClusterInfoService.DevNullClusterInfo;
import org.elasticsearch.cluster.metadata.IndexMetaData;
import org.elasticsearch.cluster.metadata.MetaData;
import org.elasticsearch.cluster.node.DiscoveryNode;
import org.elasticsearch.cluster.node.DiscoveryNodes;
import org.elasticsearch.cluster.routing.IndexRoutingTable;
import org.elasticsearch.cluster.routing.IndexShardRoutingTable;
import org.elasticsearch.cluster.routing.RecoverySource;
import org.elasticsearch.cluster.routing.RoutingNode;
import org.elasticsearch.cluster.routing.RoutingNodes;
import org.elasticsearch.cluster.routing.RoutingTable;
import org.elasticsearch.cluster.routing.ShardRouting;
import org.elasticsearch.cluster.routing.ShardRoutingState;
import org.elasticsearch.cluster.routing.TestShardRouting;
import org.elasticsearch.cluster.routing.allocation.AllocationService;
import org.elasticsearch.cluster.routing.allocation.DiskThresholdSettings;
import org.elasticsearch.cluster.routing.allocation.RoutingAllocation;
import org.elasticsearch.cluster.routing.allocation.allocator.BalancedShardsAllocator;
import org.elasticsearch.cluster.routing.allocation.command.AllocationCommand;
import org.elasticsearch.cluster.routing.allocation.command.AllocationCommands;
import org.elasticsearch.cluster.routing.allocation.command.MoveAllocationCommand;
import org.elasticsearch.common.collect.ImmutableOpenMap;
import org.elasticsearch.common.settings.ClusterSettings;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.test.gateway.TestGatewayAllocator;
import java.util.Arrays;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import static java.util.Collections.emptyMap;
import static java.util.Collections.singleton;
import static org.elasticsearch.cluster.routing.ShardRoutingState.INITIALIZING;
import static org.elasticsearch.cluster.routing.ShardRoutingState.RELOCATING;
import static org.elasticsearch.cluster.routing.ShardRoutingState.STARTED;
import static org.elasticsearch.cluster.routing.ShardRoutingState.UNASSIGNED;
import static org.hamcrest.Matchers.containsString;
import static org.hamcrest.Matchers.equalTo;
import static org.hamcrest.Matchers.nullValue;
public class DiskThresholdDeciderTests extends ESAllocationTestCase {
DiskThresholdDecider makeDecider(Settings settings) {
return new DiskThresholdDecider(settings, new ClusterSettings(settings, ClusterSettings.BUILT_IN_CLUSTER_SETTINGS));
}
public void testDiskThreshold() {
Settings diskSettings = Settings.builder()
.put(DiskThresholdSettings.CLUSTER_ROUTING_ALLOCATION_DISK_THRESHOLD_ENABLED_SETTING.getKey(), true)
.put(DiskThresholdSettings.CLUSTER_ROUTING_ALLOCATION_LOW_DISK_WATERMARK_SETTING.getKey(), 0.7)
.put(DiskThresholdSettings.CLUSTER_ROUTING_ALLOCATION_HIGH_DISK_WATERMARK_SETTING.getKey(), 0.8).build();
ImmutableOpenMap.Builder<String, DiskUsage> usagesBuilder = ImmutableOpenMap.builder();
usagesBuilder.put("node1", new DiskUsage("node1", "node1", "/dev/null", 100, 10)); // 90% used
usagesBuilder.put("node2", new DiskUsage("node2", "node2", "/dev/null", 100, 35)); // 65% used
usagesBuilder.put("node3", new DiskUsage("node3", "node3", "/dev/null", 100, 60)); // 40% used
usagesBuilder.put("node4", new DiskUsage("node4", "node4", "/dev/null", 100, 80)); // 20% used
ImmutableOpenMap<String, DiskUsage> usages = usagesBuilder.build();
ImmutableOpenMap.Builder<String, Long> shardSizesBuilder = ImmutableOpenMap.builder();
shardSizesBuilder.put("[test][0][p]", 10L); // 10 bytes
shardSizesBuilder.put("[test][0][r]", 10L);
ImmutableOpenMap<String, Long> shardSizes = shardSizesBuilder.build();
final ClusterInfo clusterInfo = new DevNullClusterInfo(usages, usages, shardSizes);
ClusterSettings clusterSettings = new ClusterSettings(Settings.EMPTY, ClusterSettings.BUILT_IN_CLUSTER_SETTINGS);
AllocationDeciders deciders = new AllocationDeciders(Settings.EMPTY,
new HashSet<>(Arrays.asList(
new SameShardAllocationDecider(Settings.EMPTY, clusterSettings),
makeDecider(diskSettings))));
ClusterInfoService cis = new ClusterInfoService() {
@Override
public ClusterInfo getClusterInfo() {
logger.info("--> calling fake getClusterInfo");
return clusterInfo;
}
@Override
public void addListener(Listener listener) {
// noop
}
};
AllocationService strategy = new AllocationService(Settings.builder()
.put("cluster.routing.allocation.node_concurrent_recoveries", 10)
.put(ClusterRebalanceAllocationDecider.CLUSTER_ROUTING_ALLOCATION_ALLOW_REBALANCE_SETTING.getKey(), "always")
.put("cluster.routing.allocation.cluster_concurrent_rebalance", -1)
.build(), deciders, new TestGatewayAllocator(), new BalancedShardsAllocator(Settings.EMPTY), cis);
MetaData metaData = MetaData.builder()
.put(IndexMetaData.builder("test").settings(settings(Version.CURRENT)).numberOfShards(1).numberOfReplicas(1))
.build();
final RoutingTable initialRoutingTable = RoutingTable.builder()
.addAsNew(metaData.index("test"))
.build();
ClusterState clusterState = ClusterState.builder(ClusterName.CLUSTER_NAME_SETTING.getDefault(Settings.EMPTY)).metaData(metaData)
.routingTable(initialRoutingTable).build();
logger.info("--> adding two nodes");
clusterState = ClusterState.builder(clusterState).nodes(DiscoveryNodes.builder()
.add(newNode("node1"))
.add(newNode("node2"))
).build();
clusterState = strategy.reroute(clusterState, "reroute");
logShardStates(clusterState);
// Primary shard should be initializing, replica should not
assertThat(clusterState.getRoutingNodes().shardsWithState(INITIALIZING).size(), equalTo(1));
logger.info("--> start the shards (primaries)");
clusterState = strategy.applyStartedShards(clusterState, clusterState.getRoutingNodes().shardsWithState(INITIALIZING));
logShardStates(clusterState);
// Assert that we're able to start the primary
assertThat(clusterState.getRoutingNodes().shardsWithState(ShardRoutingState.STARTED).size(), equalTo(1));
// Assert that node1 didn't get any shards because its disk usage is too high
assertThat(clusterState.getRoutingNodes().node("node1").size(), equalTo(0));
logger.info("--> start the shards (replicas)");
clusterState = strategy.applyStartedShards(clusterState, clusterState.getRoutingNodes().shardsWithState(INITIALIZING));
logShardStates(clusterState);
// Assert that the replica couldn't be started since node1 doesn't have enough space
assertThat(clusterState.getRoutingNodes().shardsWithState(ShardRoutingState.STARTED).size(), equalTo(1));
logger.info("--> adding node3");
clusterState = ClusterState.builder(clusterState).nodes(DiscoveryNodes.builder(clusterState.nodes())
.add(newNode("node3"))
).build();
clusterState = strategy.reroute(clusterState, "reroute");
logShardStates(clusterState);
// Assert that the replica is initialized now that node3 is available with enough space
assertThat(clusterState.getRoutingNodes().shardsWithState(ShardRoutingState.STARTED).size(), equalTo(1));
assertThat(clusterState.getRoutingNodes().shardsWithState(ShardRoutingState.INITIALIZING).size(), equalTo(1));
logger.info("--> start the shards (replicas)");
clusterState = strategy.applyStartedShards(clusterState, clusterState.getRoutingNodes().shardsWithState(INITIALIZING));
logShardStates(clusterState);
// Assert that the replica couldn't be started since node1 doesn't have enough space
assertThat(clusterState.getRoutingNodes().shardsWithState(ShardRoutingState.STARTED).size(), equalTo(2));
assertThat(clusterState.getRoutingNodes().node("node1").size(), equalTo(0));
assertThat(clusterState.getRoutingNodes().node("node2").size(), equalTo(1));
assertThat(clusterState.getRoutingNodes().node("node3").size(), equalTo(1));
logger.info("--> changing decider settings");
// Set the low threshold to 60 instead of 70
// Set the high threshold to 70 instead of 80
// node2 now should not have new shards allocated to it, but shards can remain
diskSettings = Settings.builder()
.put(DiskThresholdSettings.CLUSTER_ROUTING_ALLOCATION_DISK_THRESHOLD_ENABLED_SETTING.getKey(), true)
.put(DiskThresholdSettings.CLUSTER_ROUTING_ALLOCATION_LOW_DISK_WATERMARK_SETTING.getKey(), "60%")
.put(DiskThresholdSettings.CLUSTER_ROUTING_ALLOCATION_HIGH_DISK_WATERMARK_SETTING.getKey(), 0.7).build();
deciders = new AllocationDeciders(Settings.EMPTY,
new HashSet<>(Arrays.asList(
new SameShardAllocationDecider(Settings.EMPTY, clusterSettings),
makeDecider(diskSettings))));
strategy = new AllocationService(Settings.builder()
.put("cluster.routing.allocation.node_concurrent_recoveries", 10)
.put(ClusterRebalanceAllocationDecider.CLUSTER_ROUTING_ALLOCATION_ALLOW_REBALANCE_SETTING.getKey(), "always")
.put("cluster.routing.allocation.cluster_concurrent_rebalance", -1)
.build(), deciders, new TestGatewayAllocator(), new BalancedShardsAllocator(Settings.EMPTY), cis);
clusterState = strategy.reroute(clusterState, "reroute");
logShardStates(clusterState);
// Shards remain started
assertThat(clusterState.getRoutingNodes().shardsWithState(STARTED).size(), equalTo(2));
assertThat(clusterState.getRoutingNodes().node("node1").size(), equalTo(0));
assertThat(clusterState.getRoutingNodes().node("node2").size(), equalTo(1));
assertThat(clusterState.getRoutingNodes().node("node3").size(), equalTo(1));
logger.info("--> changing settings again");
// Set the low threshold to 50 instead of 60
// Set the high threshold to 60 instead of 70
// node2 now should not have new shards allocated to it, and shards cannot remain
diskSettings = Settings.builder()
.put(DiskThresholdSettings.CLUSTER_ROUTING_ALLOCATION_DISK_THRESHOLD_ENABLED_SETTING.getKey(), true)
.put(DiskThresholdSettings.CLUSTER_ROUTING_ALLOCATION_LOW_DISK_WATERMARK_SETTING.getKey(), 0.5)
.put(DiskThresholdSettings.CLUSTER_ROUTING_ALLOCATION_HIGH_DISK_WATERMARK_SETTING.getKey(), 0.6).build();
deciders = new AllocationDeciders(Settings.EMPTY,
new HashSet<>(Arrays.asList(
new SameShardAllocationDecider(Settings.EMPTY, clusterSettings),
makeDecider(diskSettings))));
strategy = new AllocationService(Settings.builder()
.put("cluster.routing.allocation.node_concurrent_recoveries", 10)
.put(ClusterRebalanceAllocationDecider.CLUSTER_ROUTING_ALLOCATION_ALLOW_REBALANCE_SETTING.getKey(), "always")
.put("cluster.routing.allocation.cluster_concurrent_rebalance", -1)
.build(), deciders, new TestGatewayAllocator(), new BalancedShardsAllocator(Settings.EMPTY), cis);
clusterState = strategy.reroute(clusterState, "reroute");
logShardStates(clusterState);
// Shards remain started
assertThat(clusterState.getRoutingNodes().shardsWithState(STARTED).size(), equalTo(2));
assertThat(clusterState.getRoutingNodes().node("node1").size(), equalTo(0));
// Shard hasn't been moved off of node2 yet because there's nowhere for it to go
assertThat(clusterState.getRoutingNodes().node("node2").size(), equalTo(1));
assertThat(clusterState.getRoutingNodes().node("node3").size(), equalTo(1));
logger.info("--> adding node4");
clusterState = ClusterState.builder(clusterState).nodes(DiscoveryNodes.builder(clusterState.nodes())
.add(newNode("node4"))
).build();
clusterState = strategy.reroute(clusterState, "reroute");
logShardStates(clusterState);
// Shards remain started
assertThat(clusterState.getRoutingNodes().shardsWithState(STARTED).size(), equalTo(1));
assertThat(clusterState.getRoutingNodes().shardsWithState(INITIALIZING).size(), equalTo(1));
logger.info("--> apply INITIALIZING shards");
clusterState = strategy.applyStartedShards(clusterState, clusterState.getRoutingNodes().shardsWithState(INITIALIZING));
logShardStates(clusterState);
assertThat(clusterState.getRoutingNodes().node("node1").size(), equalTo(0));
// Node4 is available now, so the shard is moved off of node2
assertThat(clusterState.getRoutingNodes().node("node2").size(), equalTo(0));
assertThat(clusterState.getRoutingNodes().node("node3").size(), equalTo(1));
assertThat(clusterState.getRoutingNodes().node("node4").size(), equalTo(1));
}
public void testDiskThresholdWithAbsoluteSizes() {
Settings diskSettings = Settings.builder()
.put(DiskThresholdSettings.CLUSTER_ROUTING_ALLOCATION_DISK_THRESHOLD_ENABLED_SETTING.getKey(), true)
.put(DiskThresholdSettings.CLUSTER_ROUTING_ALLOCATION_LOW_DISK_WATERMARK_SETTING.getKey(), "30b")
.put(DiskThresholdSettings.CLUSTER_ROUTING_ALLOCATION_HIGH_DISK_WATERMARK_SETTING.getKey(), "9b").build();
ImmutableOpenMap.Builder<String, DiskUsage> usagesBuilder = ImmutableOpenMap.builder();
usagesBuilder.put("node1", new DiskUsage("node1", "n1", "/dev/null", 100, 10)); // 90% used
usagesBuilder.put("node2", new DiskUsage("node2", "n2", "/dev/null", 100, 10)); // 90% used
usagesBuilder.put("node3", new DiskUsage("node3", "n3", "/dev/null", 100, 60)); // 40% used
usagesBuilder.put("node4", new DiskUsage("node4", "n4", "/dev/null", 100, 80)); // 20% used
usagesBuilder.put("node5", new DiskUsage("node5", "n5", "/dev/null", 100, 85)); // 15% used
ImmutableOpenMap<String, DiskUsage> usages = usagesBuilder.build();
ImmutableOpenMap.Builder<String, Long> shardSizesBuilder = ImmutableOpenMap.builder();
shardSizesBuilder.put("[test][0][p]", 10L); // 10 bytes
shardSizesBuilder.put("[test][0][r]", 10L);
ImmutableOpenMap<String, Long> shardSizes = shardSizesBuilder.build();
final ClusterInfo clusterInfo = new DevNullClusterInfo(usages, usages, shardSizes);
ClusterSettings clusterSettings = new ClusterSettings(Settings.EMPTY, ClusterSettings.BUILT_IN_CLUSTER_SETTINGS);
AllocationDeciders deciders = new AllocationDeciders(Settings.EMPTY,
new HashSet<>(Arrays.asList(
new SameShardAllocationDecider(Settings.EMPTY, clusterSettings),
makeDecider(diskSettings))));
ClusterInfoService cis = new ClusterInfoService() {
@Override
public ClusterInfo getClusterInfo() {
logger.info("--> calling fake getClusterInfo");
return clusterInfo;
}
@Override
public void addListener(Listener listener) {
// noop
}
};
AllocationService strategy = new AllocationService(Settings.builder()
.put("cluster.routing.allocation.node_concurrent_recoveries", 10)
.put(ClusterRebalanceAllocationDecider.CLUSTER_ROUTING_ALLOCATION_ALLOW_REBALANCE_SETTING.getKey(), "always")
.put("cluster.routing.allocation.cluster_concurrent_rebalance", -1)
.build(), deciders, new TestGatewayAllocator(), new BalancedShardsAllocator(Settings.EMPTY), cis);
MetaData metaData = MetaData.builder()
.put(IndexMetaData.builder("test").settings(settings(Version.CURRENT)).numberOfShards(1).numberOfReplicas(2))
.build();
RoutingTable initialRoutingTable = RoutingTable.builder()
.addAsNew(metaData.index("test"))
.build();
ClusterState clusterState = ClusterState.builder(ClusterName.CLUSTER_NAME_SETTING.getDefault(Settings.EMPTY)).metaData(metaData)
.routingTable(initialRoutingTable).build();
logger.info("--> adding node1 and node2 node");
clusterState = ClusterState.builder(clusterState).nodes(DiscoveryNodes.builder()
.add(newNode("node1"))
.add(newNode("node2"))
).build();
clusterState = strategy.reroute(clusterState, "reroute");
logShardStates(clusterState);
// Primary should initialize, even though both nodes are over the limit initialize
assertThat(clusterState.getRoutingNodes().shardsWithState(INITIALIZING).size(), equalTo(1));
String nodeWithPrimary, nodeWithoutPrimary;
if (clusterState.getRoutingNodes().node("node1").size() == 1) {
nodeWithPrimary = "node1";
nodeWithoutPrimary = "node2";
} else {
nodeWithPrimary = "node2";
nodeWithoutPrimary = "node1";
}
logger.info("--> nodeWithPrimary: {}", nodeWithPrimary);
logger.info("--> nodeWithoutPrimary: {}", nodeWithoutPrimary);
// Make node without the primary now habitable to replicas
usagesBuilder = ImmutableOpenMap.builder(usages);
usagesBuilder.put(nodeWithoutPrimary, new DiskUsage(nodeWithoutPrimary, "", "/dev/null", 100, 35)); // 65% used
usages = usagesBuilder.build();
final ClusterInfo clusterInfo2 = new DevNullClusterInfo(usages, usages, shardSizes);
cis = new ClusterInfoService() {
@Override
public ClusterInfo getClusterInfo() {
logger.info("--> calling fake getClusterInfo");
return clusterInfo2;
}
@Override
public void addListener(Listener listener) {
// noop
}
};
strategy = new AllocationService(Settings.builder()
.put("cluster.routing.allocation.node_concurrent_recoveries", 10)
.put(ClusterRebalanceAllocationDecider.CLUSTER_ROUTING_ALLOCATION_ALLOW_REBALANCE_SETTING.getKey(), "always")
.put("cluster.routing.allocation.cluster_concurrent_rebalance", -1)
.build(), deciders, new TestGatewayAllocator(), new BalancedShardsAllocator(Settings.EMPTY), cis);
clusterState = strategy.reroute(clusterState, "reroute");
logShardStates(clusterState);
// Now the replica should be able to initialize
assertThat(clusterState.getRoutingNodes().shardsWithState(INITIALIZING).size(), equalTo(2));
logger.info("--> start the shards (primaries)");
clusterState = strategy.applyStartedShards(clusterState, clusterState.getRoutingNodes().shardsWithState(INITIALIZING));
logShardStates(clusterState);
// Assert that we're able to start the primary and replica, since they were both initializing
assertThat(clusterState.getRoutingNodes().shardsWithState(ShardRoutingState.STARTED).size(), equalTo(2));
// Assert that node1 got a single shard (the primary), even though its disk usage is too high
assertThat(clusterState.getRoutingNodes().node("node1").size(), equalTo(1));
// Assert that node2 got a single shard (a replica)
assertThat(clusterState.getRoutingNodes().node("node2").size(), equalTo(1));
// Assert that one replica is still unassigned
//assertThat(clusterState.routingNodes().shardsWithState(ShardRoutingState.UNASSIGNED).size(), equalTo(1));
logger.info("--> adding node3");
clusterState = ClusterState.builder(clusterState).nodes(DiscoveryNodes.builder(clusterState.nodes())
.add(newNode("node3"))
).build();
clusterState = strategy.reroute(clusterState, "reroute");
logShardStates(clusterState);
// Assert that the replica is initialized now that node3 is available with enough space
assertThat(clusterState.getRoutingNodes().shardsWithState(ShardRoutingState.STARTED).size(), equalTo(2));
assertThat(clusterState.getRoutingNodes().shardsWithState(ShardRoutingState.INITIALIZING).size(), equalTo(1));
logger.info("--> start the shards (replicas)");
clusterState = strategy.applyStartedShards(clusterState, clusterState.getRoutingNodes().shardsWithState(INITIALIZING));
logShardStates(clusterState);
// Assert that all replicas could be started
assertThat(clusterState.getRoutingNodes().shardsWithState(ShardRoutingState.STARTED).size(), equalTo(3));
assertThat(clusterState.getRoutingNodes().node("node1").size(), equalTo(1));
assertThat(clusterState.getRoutingNodes().node("node2").size(), equalTo(1));
assertThat(clusterState.getRoutingNodes().node("node3").size(), equalTo(1));
logger.info("--> changing decider settings");
// Set the low threshold to 60 instead of 70
// Set the high threshold to 70 instead of 80
// node2 now should not have new shards allocated to it, but shards can remain
diskSettings = Settings.builder()
.put(DiskThresholdSettings.CLUSTER_ROUTING_ALLOCATION_DISK_THRESHOLD_ENABLED_SETTING.getKey(), true)
.put(DiskThresholdSettings.CLUSTER_ROUTING_ALLOCATION_LOW_DISK_WATERMARK_SETTING.getKey(), "40b")
.put(DiskThresholdSettings.CLUSTER_ROUTING_ALLOCATION_HIGH_DISK_WATERMARK_SETTING.getKey(), "30b").build();
deciders = new AllocationDeciders(Settings.EMPTY,
new HashSet<>(Arrays.asList(
new SameShardAllocationDecider(Settings.EMPTY, clusterSettings),
makeDecider(diskSettings))));
strategy = new AllocationService(Settings.builder()
.put("cluster.routing.allocation.node_concurrent_recoveries", 10)
.put(ClusterRebalanceAllocationDecider.CLUSTER_ROUTING_ALLOCATION_ALLOW_REBALANCE_SETTING.getKey(), "always")
.put("cluster.routing.allocation.cluster_concurrent_rebalance", -1)
.build(), deciders, new TestGatewayAllocator(), new BalancedShardsAllocator(Settings.EMPTY), cis);
clusterState = strategy.reroute(clusterState, "reroute");
logShardStates(clusterState);
// Shards remain started
assertThat(clusterState.getRoutingNodes().shardsWithState(STARTED).size(), equalTo(3));
assertThat(clusterState.getRoutingNodes().node("node1").size(), equalTo(1));
assertThat(clusterState.getRoutingNodes().node("node2").size(), equalTo(1));
assertThat(clusterState.getRoutingNodes().node("node3").size(), equalTo(1));
logger.info("--> changing settings again");
// Set the low threshold to 50 instead of 60
// Set the high threshold to 60 instead of 70
// node2 now should not have new shards allocated to it, and shards cannot remain
diskSettings = Settings.builder()
.put(DiskThresholdSettings.CLUSTER_ROUTING_ALLOCATION_DISK_THRESHOLD_ENABLED_SETTING.getKey(), true)
.put(DiskThresholdSettings.CLUSTER_ROUTING_ALLOCATION_LOW_DISK_WATERMARK_SETTING.getKey(), "50b")
.put(DiskThresholdSettings.CLUSTER_ROUTING_ALLOCATION_HIGH_DISK_WATERMARK_SETTING.getKey(), "40b").build();
deciders = new AllocationDeciders(Settings.EMPTY,
new HashSet<>(Arrays.asList(
new SameShardAllocationDecider(Settings.EMPTY, clusterSettings),
makeDecider(diskSettings))));
strategy = new AllocationService(Settings.builder()
.put("cluster.routing.allocation.node_concurrent_recoveries", 10)
.put(ClusterRebalanceAllocationDecider.CLUSTER_ROUTING_ALLOCATION_ALLOW_REBALANCE_SETTING.getKey(), "always")
.put("cluster.routing.allocation.cluster_concurrent_rebalance", -1)
.build(), deciders, new TestGatewayAllocator(), new BalancedShardsAllocator(Settings.EMPTY), cis);
clusterState = strategy.reroute(clusterState, "reroute");
logShardStates(clusterState);
// Shards remain started
assertThat(clusterState.getRoutingNodes().shardsWithState(STARTED).size(), equalTo(3));
assertThat(clusterState.getRoutingNodes().node("node1").size(), equalTo(1));
// Shard hasn't been moved off of node2 yet because there's nowhere for it to go
assertThat(clusterState.getRoutingNodes().node("node2").size(), equalTo(1));
assertThat(clusterState.getRoutingNodes().node("node3").size(), equalTo(1));
logger.info("--> adding node4");
clusterState = ClusterState.builder(clusterState).nodes(DiscoveryNodes.builder(clusterState.nodes())
.add(newNode("node4"))
).build();
clusterState = strategy.reroute(clusterState, "reroute");
logShardStates(clusterState);
// Shards remain started
assertThat(clusterState.getRoutingNodes().shardsWithState(STARTED).size(), equalTo(2));
// One shard is relocating off of node1
assertThat(clusterState.getRoutingNodes().shardsWithState(RELOCATING).size(), equalTo(1));
assertThat(clusterState.getRoutingNodes().shardsWithState(INITIALIZING).size(), equalTo(1));
logger.info("--> apply INITIALIZING shards");
clusterState = strategy.applyStartedShards(clusterState, clusterState.getRoutingNodes().shardsWithState(INITIALIZING));
logShardStates(clusterState);
// primary shard already has been relocated away
assertThat(clusterState.getRoutingNodes().node(nodeWithPrimary).size(), equalTo(0));
// node with increased space still has its shard
assertThat(clusterState.getRoutingNodes().node(nodeWithoutPrimary).size(), equalTo(1));
assertThat(clusterState.getRoutingNodes().node("node3").size(), equalTo(1));
assertThat(clusterState.getRoutingNodes().node("node4").size(), equalTo(1));
logger.info("--> adding node5");
clusterState = ClusterState.builder(clusterState).nodes(DiscoveryNodes.builder(clusterState.nodes())
.add(newNode("node5"))
).build();
clusterState = strategy.reroute(clusterState, "reroute");
logShardStates(clusterState);
// Shards remain started on node3 and node4
assertThat(clusterState.getRoutingNodes().shardsWithState(STARTED).size(), equalTo(2));
// One shard is relocating off of node2 now
assertThat(clusterState.getRoutingNodes().shardsWithState(RELOCATING).size(), equalTo(1));
// Initializing on node5
assertThat(clusterState.getRoutingNodes().shardsWithState(INITIALIZING).size(), equalTo(1));
logger.info("--> apply INITIALIZING shards");
clusterState = strategy.applyStartedShards(clusterState, clusterState.getRoutingNodes().shardsWithState(INITIALIZING));
logger.info("--> final cluster state:");
logShardStates(clusterState);
// Node1 still has no shards because it has no space for them
assertThat(clusterState.getRoutingNodes().node("node1").size(), equalTo(0));
// Node5 is available now, so the shard is moved off of node2
assertThat(clusterState.getRoutingNodes().node("node2").size(), equalTo(0));
assertThat(clusterState.getRoutingNodes().node("node3").size(), equalTo(1));
assertThat(clusterState.getRoutingNodes().node("node4").size(), equalTo(1));
assertThat(clusterState.getRoutingNodes().node("node5").size(), equalTo(1));
}
public void testDiskThresholdWithShardSizes() {
Settings diskSettings = Settings.builder()
.put(DiskThresholdSettings.CLUSTER_ROUTING_ALLOCATION_DISK_THRESHOLD_ENABLED_SETTING.getKey(), true)
.put(DiskThresholdSettings.CLUSTER_ROUTING_ALLOCATION_LOW_DISK_WATERMARK_SETTING.getKey(), 0.7)
.put(DiskThresholdSettings.CLUSTER_ROUTING_ALLOCATION_HIGH_DISK_WATERMARK_SETTING.getKey(), "71%").build();
ImmutableOpenMap.Builder<String, DiskUsage> usagesBuilder = ImmutableOpenMap.builder();
usagesBuilder.put("node1", new DiskUsage("node1", "n1", "/dev/null", 100, 31)); // 69% used
usagesBuilder.put("node2", new DiskUsage("node2", "n2", "/dev/null", 100, 1)); // 99% used
ImmutableOpenMap<String, DiskUsage> usages = usagesBuilder.build();
ImmutableOpenMap.Builder<String, Long> shardSizesBuilder = ImmutableOpenMap.builder();
shardSizesBuilder.put("[test][0][p]", 10L); // 10 bytes
ImmutableOpenMap<String, Long> shardSizes = shardSizesBuilder.build();
final ClusterInfo clusterInfo = new DevNullClusterInfo(usages, usages, shardSizes);
AllocationDeciders deciders = new AllocationDeciders(Settings.EMPTY,
new HashSet<>(Arrays.asList(
new SameShardAllocationDecider(
Settings.EMPTY, new ClusterSettings(Settings.EMPTY, ClusterSettings.BUILT_IN_CLUSTER_SETTINGS)
),
makeDecider(diskSettings))));
ClusterInfoService cis = new ClusterInfoService() {
@Override
public ClusterInfo getClusterInfo() {
logger.info("--> calling fake getClusterInfo");
return clusterInfo;
}
@Override
public void addListener(Listener listener) {
// noop
}
};
AllocationService strategy = new AllocationService(Settings.builder()
.put("cluster.routing.allocation.node_concurrent_recoveries", 10)
.put(ClusterRebalanceAllocationDecider.CLUSTER_ROUTING_ALLOCATION_ALLOW_REBALANCE_SETTING.getKey(), "always")
.put("cluster.routing.allocation.cluster_concurrent_rebalance", -1)
.build(), deciders, new TestGatewayAllocator(), new BalancedShardsAllocator(Settings.EMPTY), cis);
MetaData metaData = MetaData.builder()
.put(IndexMetaData.builder("test").settings(settings(Version.CURRENT)).numberOfShards(1).numberOfReplicas(0))
.build();
RoutingTable routingTable = RoutingTable.builder()
.addAsNew(metaData.index("test"))
.build();
ClusterState clusterState = ClusterState.builder(ClusterName.CLUSTER_NAME_SETTING.getDefault(Settings.EMPTY)).metaData(metaData)
.routingTable(routingTable).build();
logger.info("--> adding node1");
clusterState = ClusterState.builder(clusterState).nodes(DiscoveryNodes.builder()
.add(newNode("node1"))
.add(newNode("node2")) // node2 is added because DiskThresholdDecider automatically ignore single-node clusters
).build();
routingTable = strategy.reroute(clusterState, "reroute").routingTable();
clusterState = ClusterState.builder(clusterState).routingTable(routingTable).build();
logger.info("--> start the shards (primaries)");
routingTable = strategy.applyStartedShards(clusterState, clusterState.getRoutingNodes().shardsWithState(INITIALIZING))
.routingTable();
clusterState = ClusterState.builder(clusterState).routingTable(routingTable).build();
logShardStates(clusterState);
// Shard can't be allocated to node1 (or node2) because it would cause too much usage
assertThat(clusterState.getRoutingNodes().shardsWithState(INITIALIZING).size(), equalTo(0));
// No shards are started, no nodes have enough disk for allocation
assertThat(clusterState.getRoutingNodes().shardsWithState(STARTED).size(), equalTo(0));
}
public void testUnknownDiskUsage() {
Settings diskSettings = Settings.builder()
.put(DiskThresholdSettings.CLUSTER_ROUTING_ALLOCATION_DISK_THRESHOLD_ENABLED_SETTING.getKey(), true)
.put(DiskThresholdSettings.CLUSTER_ROUTING_ALLOCATION_LOW_DISK_WATERMARK_SETTING.getKey(), 0.7)
.put(DiskThresholdSettings.CLUSTER_ROUTING_ALLOCATION_HIGH_DISK_WATERMARK_SETTING.getKey(), 0.85).build();
ImmutableOpenMap.Builder<String, DiskUsage> usagesBuilder = ImmutableOpenMap.builder();
usagesBuilder.put("node2", new DiskUsage("node2", "node2", "/dev/null", 100, 50)); // 50% used
usagesBuilder.put("node3", new DiskUsage("node3", "node3", "/dev/null", 100, 0)); // 100% used
ImmutableOpenMap<String, DiskUsage> usages = usagesBuilder.build();
ImmutableOpenMap.Builder<String, Long> shardSizesBuilder = ImmutableOpenMap.builder();
shardSizesBuilder.put("[test][0][p]", 10L); // 10 bytes
shardSizesBuilder.put("[test][0][r]", 10L); // 10 bytes
ImmutableOpenMap<String, Long> shardSizes = shardSizesBuilder.build();
final ClusterInfo clusterInfo = new DevNullClusterInfo(usages, usages, shardSizes);
AllocationDeciders deciders = new AllocationDeciders(Settings.EMPTY,
new HashSet<>(Arrays.asList(
new SameShardAllocationDecider(
Settings.EMPTY, new ClusterSettings(Settings.EMPTY, ClusterSettings.BUILT_IN_CLUSTER_SETTINGS)
),
makeDecider(diskSettings))));
ClusterInfoService cis = new ClusterInfoService() {
@Override
public ClusterInfo getClusterInfo() {
logger.info("--> calling fake getClusterInfo");
return clusterInfo;
}
@Override
public void addListener(Listener listener) {
// noop
}
};
AllocationService strategy = new AllocationService(Settings.builder()
.put("cluster.routing.allocation.node_concurrent_recoveries", 10)
.put(ClusterRebalanceAllocationDecider.CLUSTER_ROUTING_ALLOCATION_ALLOW_REBALANCE_SETTING.getKey(), "always")
.put("cluster.routing.allocation.cluster_concurrent_rebalance", -1)
.build(), deciders, new TestGatewayAllocator(), new BalancedShardsAllocator(Settings.EMPTY), cis);
MetaData metaData = MetaData.builder()
.put(IndexMetaData.builder("test").settings(settings(Version.CURRENT)).numberOfShards(1).numberOfReplicas(0))
.build();
RoutingTable routingTable = RoutingTable.builder()
.addAsNew(metaData.index("test"))
.build();
ClusterState clusterState = ClusterState.builder(ClusterName.CLUSTER_NAME_SETTING.getDefault(Settings.EMPTY)).metaData(metaData)
.routingTable(routingTable).build();
logger.info("--> adding node1");
clusterState = ClusterState.builder(clusterState).nodes(DiscoveryNodes.builder()
.add(newNode("node1"))
.add(newNode("node3")) // node3 is added because DiskThresholdDecider automatically ignore single-node clusters
).build();
routingTable = strategy.reroute(clusterState, "reroute").routingTable();
clusterState = ClusterState.builder(clusterState).routingTable(routingTable).build();
// Shard can be allocated to node1, even though it only has 25% free,
// because it's a primary that's never been allocated before
assertThat(clusterState.getRoutingNodes().shardsWithState(INITIALIZING).size(), equalTo(1));
logger.info("--> start the shards (primaries)");
routingTable = strategy.applyStartedShards(clusterState, clusterState.getRoutingNodes().shardsWithState(INITIALIZING))
.routingTable();
clusterState = ClusterState.builder(clusterState).routingTable(routingTable).build();
logShardStates(clusterState);
// A single shard is started on node1, even though it normally would not
// be allowed, because it's a primary that hasn't been allocated, and node1
// is still below the high watermark (unlike node3)
assertThat(clusterState.getRoutingNodes().shardsWithState(STARTED).size(), equalTo(1));
assertThat(clusterState.getRoutingNodes().node("node1").size(), equalTo(1));
}
public void testAverageUsage() {
RoutingNode rn = new RoutingNode("node1", newNode("node1"));
DiskThresholdDecider decider = makeDecider(Settings.EMPTY);
ImmutableOpenMap.Builder<String, DiskUsage> usages = ImmutableOpenMap.builder();
usages.put("node2", new DiskUsage("node2", "n2", "/dev/null", 100, 50)); // 50% used
usages.put("node3", new DiskUsage("node3", "n3", "/dev/null", 100, 0)); // 100% used
DiskUsage node1Usage = decider.averageUsage(rn, usages.build());
assertThat(node1Usage.getTotalBytes(), equalTo(100L));
assertThat(node1Usage.getFreeBytes(), equalTo(25L));
}
public void testFreeDiskPercentageAfterShardAssigned() {
RoutingNode rn = new RoutingNode("node1", newNode("node1"));
DiskThresholdDecider decider = makeDecider(Settings.EMPTY);
Map<String, DiskUsage> usages = new HashMap<>();
usages.put("node2", new DiskUsage("node2", "n2", "/dev/null", 100, 50)); // 50% used
usages.put("node3", new DiskUsage("node3", "n3", "/dev/null", 100, 0)); // 100% used
Double after = decider.freeDiskPercentageAfterShardAssigned(new DiskUsage("node2", "n2", "/dev/null", 100, 30), 11L);
assertThat(after, equalTo(19.0));
}
public void testShardRelocationsTakenIntoAccount() {
Settings diskSettings = Settings.builder()
.put(DiskThresholdSettings.CLUSTER_ROUTING_ALLOCATION_DISK_THRESHOLD_ENABLED_SETTING.getKey(), true)
.put(DiskThresholdSettings.CLUSTER_ROUTING_ALLOCATION_INCLUDE_RELOCATIONS_SETTING.getKey(), true)
.put(DiskThresholdSettings.CLUSTER_ROUTING_ALLOCATION_LOW_DISK_WATERMARK_SETTING.getKey(), 0.7)
.put(DiskThresholdSettings.CLUSTER_ROUTING_ALLOCATION_HIGH_DISK_WATERMARK_SETTING.getKey(), 0.8).build();
ImmutableOpenMap.Builder<String, DiskUsage> usagesBuilder = ImmutableOpenMap.builder();
usagesBuilder.put("node1", new DiskUsage("node1", "n1", "/dev/null", 100, 40)); // 60% used
usagesBuilder.put("node2", new DiskUsage("node2", "n2", "/dev/null", 100, 40)); // 60% used
usagesBuilder.put("node3", new DiskUsage("node3", "n3", "/dev/null", 100, 40)); // 60% used
ImmutableOpenMap<String, DiskUsage> usages = usagesBuilder.build();
ImmutableOpenMap.Builder<String, Long> shardSizesBuilder = ImmutableOpenMap.builder();
shardSizesBuilder.put("[test][0][p]", 14L); // 14 bytes
shardSizesBuilder.put("[test][0][r]", 14L);
shardSizesBuilder.put("[test2][0][p]", 1L); // 1 bytes
shardSizesBuilder.put("[test2][0][r]", 1L);
ImmutableOpenMap<String, Long> shardSizes = shardSizesBuilder.build();
final ClusterInfo clusterInfo = new DevNullClusterInfo(usages, usages, shardSizes);
DiskThresholdDecider decider = makeDecider(diskSettings);
AllocationDeciders deciders = new AllocationDeciders(Settings.EMPTY,
new HashSet<>(Arrays.asList(new SameShardAllocationDecider(
Settings.EMPTY, new ClusterSettings(Settings.EMPTY, ClusterSettings.BUILT_IN_CLUSTER_SETTINGS)
), decider)));
ClusterInfoService cis = new ClusterInfoService() {
@Override
public ClusterInfo getClusterInfo() {
logger.info("--> calling fake getClusterInfo");
return clusterInfo;
}
@Override
public void addListener(Listener listener) {
// noop
}
};
AllocationService strategy = new AllocationService(Settings.builder()
.put("cluster.routing.allocation.node_concurrent_recoveries", 10)
.put(ClusterRebalanceAllocationDecider.CLUSTER_ROUTING_ALLOCATION_ALLOW_REBALANCE_SETTING.getKey(), "always")
.put("cluster.routing.allocation.cluster_concurrent_rebalance", -1)
.build(), deciders, new TestGatewayAllocator(), new BalancedShardsAllocator(Settings.EMPTY), cis);
MetaData metaData = MetaData.builder()
.put(IndexMetaData.builder("test").settings(settings(Version.CURRENT)).numberOfShards(1).numberOfReplicas(1))
.put(IndexMetaData.builder("test2").settings(settings(Version.CURRENT)).numberOfShards(1).numberOfReplicas(1))
.build();
RoutingTable initialRoutingTable = RoutingTable.builder()
.addAsNew(metaData.index("test"))
.addAsNew(metaData.index("test2"))
.build();
ClusterState clusterState = ClusterState.builder(ClusterName.CLUSTER_NAME_SETTING.getDefault(Settings.EMPTY)).metaData(metaData)
.routingTable(initialRoutingTable).build();
logger.info("--> adding two nodes");
clusterState = ClusterState.builder(clusterState).nodes(DiscoveryNodes.builder()
.add(newNode("node1"))
.add(newNode("node2"))
).build();
clusterState = strategy.reroute(clusterState, "reroute");
logShardStates(clusterState);
// shards should be initializing
assertThat(clusterState.getRoutingNodes().shardsWithState(INITIALIZING).size(), equalTo(4));
logger.info("--> start the shards");
clusterState = strategy.applyStartedShards(clusterState, clusterState.getRoutingNodes().shardsWithState(INITIALIZING));
logShardStates(clusterState);
// Assert that we're able to start the primary and replicas
assertThat(clusterState.getRoutingNodes().shardsWithState(ShardRoutingState.STARTED).size(), equalTo(4));
logger.info("--> adding node3");
clusterState = ClusterState.builder(clusterState).nodes(DiscoveryNodes.builder(clusterState.nodes())
.add(newNode("node3"))
).build();
AllocationCommand relocate1 = new MoveAllocationCommand("test", 0, "node2", "node3");
AllocationCommands cmds = new AllocationCommands(relocate1);
clusterState = strategy.reroute(clusterState, cmds, false, false).getClusterState();
logShardStates(clusterState);
AllocationCommand relocate2 = new MoveAllocationCommand("test2", 0, "node2", "node3");
cmds = new AllocationCommands(relocate2);
try {
// The shard for the "test" index is already being relocated to
// node3, which will put it over the low watermark when it
// completes, with shard relocations taken into account this should
// throw an exception about not being able to complete
strategy.reroute(clusterState, cmds, false, false);
fail("should not have been able to reroute the shard");
} catch (IllegalArgumentException e) {
assertThat("can't be allocated because there isn't enough room: " + e.getMessage(),
e.getMessage(),
containsString("the node is above the low watermark cluster setting " +
"[cluster.routing.allocation.disk.watermark.low=0.7], using more disk space than the maximum " +
"allowed [70.0%], actual free: [26.0%]"));
}
}
public void testCanRemainWithShardRelocatingAway() {
Settings diskSettings = Settings.builder()
.put(DiskThresholdSettings.CLUSTER_ROUTING_ALLOCATION_DISK_THRESHOLD_ENABLED_SETTING.getKey(), true)
.put(DiskThresholdSettings.CLUSTER_ROUTING_ALLOCATION_INCLUDE_RELOCATIONS_SETTING.getKey(), true)
.put(DiskThresholdSettings.CLUSTER_ROUTING_ALLOCATION_LOW_DISK_WATERMARK_SETTING.getKey(), "60%")
.put(DiskThresholdSettings.CLUSTER_ROUTING_ALLOCATION_HIGH_DISK_WATERMARK_SETTING.getKey(), "70%").build();
// We have an index with 2 primary shards each taking 40 bytes. Each node has 100 bytes available
ImmutableOpenMap.Builder<String, DiskUsage> usagesBuilder = ImmutableOpenMap.builder();
usagesBuilder.put("node1", new DiskUsage("node1", "n1", "/dev/null", 100, 20)); // 80% used
usagesBuilder.put("node2", new DiskUsage("node2", "n2", "/dev/null", 100, 100)); // 0% used
ImmutableOpenMap<String, DiskUsage> usages = usagesBuilder.build();
ImmutableOpenMap.Builder<String, Long> shardSizesBuilder = ImmutableOpenMap.builder();
shardSizesBuilder.put("[test][0][p]", 40L);
shardSizesBuilder.put("[test][1][p]", 40L);
shardSizesBuilder.put("[foo][0][p]", 10L);
ImmutableOpenMap<String, Long> shardSizes = shardSizesBuilder.build();
final ClusterInfo clusterInfo = new DevNullClusterInfo(usages, usages, shardSizes);
DiskThresholdDecider diskThresholdDecider = makeDecider(diskSettings);
MetaData metaData = MetaData.builder()
.put(IndexMetaData.builder("test").settings(settings(Version.CURRENT)).numberOfShards(2).numberOfReplicas(0))
.put(IndexMetaData.builder("foo").settings(settings(Version.CURRENT)).numberOfShards(1).numberOfReplicas(0))
.build();
RoutingTable initialRoutingTable = RoutingTable.builder()
.addAsNew(metaData.index("test"))
.addAsNew(metaData.index("foo"))
.build();
DiscoveryNode discoveryNode1 = new DiscoveryNode("node1", buildNewFakeTransportAddress(), emptyMap(),
MASTER_DATA_ROLES, Version.CURRENT);
DiscoveryNode discoveryNode2 = new DiscoveryNode("node2", buildNewFakeTransportAddress(), emptyMap(),
MASTER_DATA_ROLES, Version.CURRENT);
DiscoveryNodes discoveryNodes = DiscoveryNodes.builder().add(discoveryNode1).add(discoveryNode2).build();
ClusterState baseClusterState = ClusterState.builder(ClusterName.CLUSTER_NAME_SETTING.getDefault(Settings.EMPTY))
.metaData(metaData)
.routingTable(initialRoutingTable)
.nodes(discoveryNodes)
.build();
// Two shards consuming each 80% of disk space while 70% is allowed, so shard 0 isn't allowed here
ShardRouting firstRouting = TestShardRouting.newShardRouting("test", 0, "node1", null, true, ShardRoutingState.STARTED);
ShardRouting secondRouting = TestShardRouting.newShardRouting("test", 1, "node1", null, true, ShardRoutingState.STARTED);
RoutingNode firstRoutingNode = new RoutingNode("node1", discoveryNode1, firstRouting, secondRouting);
RoutingTable.Builder builder = RoutingTable.builder().add(
IndexRoutingTable.builder(firstRouting.index())
.addIndexShard(new IndexShardRoutingTable.Builder(firstRouting.shardId())
.addShard(firstRouting)
.build()
)
.addIndexShard(new IndexShardRoutingTable.Builder(secondRouting.shardId())
.addShard(secondRouting)
.build()
)
);
ClusterState clusterState = ClusterState.builder(baseClusterState).routingTable(builder.build()).build();
RoutingAllocation routingAllocation = new RoutingAllocation(null, new RoutingNodes(clusterState), clusterState, clusterInfo,
System.nanoTime(), false);
routingAllocation.debugDecision(true);
Decision decision = diskThresholdDecider.canRemain(firstRouting, firstRoutingNode, routingAllocation);
assertThat(decision.type(), equalTo(Decision.Type.NO));
assertThat(((Decision.Single) decision).getExplanation(), containsString(
"the shard cannot remain on this node because it is above the high watermark cluster setting " +
"[cluster.routing.allocation.disk.watermark.high=70%] and there is less than the required [30.0%] free disk on node, " +
"actual free: [20.0%]"));
// Two shards consuming each 80% of disk space while 70% is allowed, but one is relocating, so shard 0 can stay
firstRouting = TestShardRouting.newShardRouting("test", 0, "node1", null, true, ShardRoutingState.STARTED);
secondRouting = TestShardRouting.newShardRouting("test", 1, "node1", "node2", true, ShardRoutingState.RELOCATING);
ShardRouting fooRouting = TestShardRouting.newShardRouting("foo", 0, "node1", null, true, ShardRoutingState.UNASSIGNED);
firstRoutingNode = new RoutingNode("node1", discoveryNode1, firstRouting, secondRouting);
builder = RoutingTable.builder().add(
IndexRoutingTable.builder(firstRouting.index())
.addIndexShard(new IndexShardRoutingTable.Builder(firstRouting.shardId())
.addShard(firstRouting)
.build()
)
.addIndexShard(new IndexShardRoutingTable.Builder(secondRouting.shardId())
.addShard(secondRouting)
.build()
)
);
clusterState = ClusterState.builder(baseClusterState).routingTable(builder.build()).build();
routingAllocation = new RoutingAllocation(null, new RoutingNodes(clusterState), clusterState, clusterInfo, System.nanoTime(),
false);
routingAllocation.debugDecision(true);
decision = diskThresholdDecider.canRemain(firstRouting, firstRoutingNode, routingAllocation);
assertThat(decision.type(), equalTo(Decision.Type.YES));
assertEquals("there is enough disk on this node for the shard to remain, free: [60b]",
((Decision.Single) decision).getExplanation());
decision = diskThresholdDecider.canAllocate(fooRouting, firstRoutingNode, routingAllocation);
assertThat(decision.type(), equalTo(Decision.Type.NO));
if (fooRouting.recoverySource().getType() == RecoverySource.Type.EMPTY_STORE) {
assertThat(((Decision.Single) decision).getExplanation(), containsString(
"the node is above the high watermark cluster setting [cluster.routing.allocation.disk.watermark.high=70%], using " +
"more disk space than the maximum allowed [70.0%], actual free: [20.0%]"));
} else {
assertThat(((Decision.Single) decision).getExplanation(), containsString(
"the node is above the low watermark cluster setting [cluster.routing.allocation.disk.watermark.low=60%], using more " +
"disk space than the maximum allowed [60.0%], actual free: [20.0%]"));
}
// Creating AllocationService instance and the services it depends on...
ClusterInfoService cis = new ClusterInfoService() {
@Override
public ClusterInfo getClusterInfo() {
logger.info("--> calling fake getClusterInfo");
return clusterInfo;
}
@Override
public void addListener(Listener listener) {
// noop
}
};
AllocationDeciders deciders = new AllocationDeciders(Settings.EMPTY, new HashSet<>(Arrays.asList(
new SameShardAllocationDecider(
Settings.EMPTY, new ClusterSettings(Settings.EMPTY, ClusterSettings.BUILT_IN_CLUSTER_SETTINGS)
),
diskThresholdDecider
)));
AllocationService strategy = new AllocationService(Settings.builder()
.put("cluster.routing.allocation.node_concurrent_recoveries", 10)
.put(ClusterRebalanceAllocationDecider.CLUSTER_ROUTING_ALLOCATION_ALLOW_REBALANCE_SETTING.getKey(), "always")
.put("cluster.routing.allocation.cluster_concurrent_rebalance", -1)
.build(), deciders, new TestGatewayAllocator(), new BalancedShardsAllocator(Settings.EMPTY), cis);
// Ensure that the reroute call doesn't alter the routing table, since the first primary is relocating away
// and therefor we will have sufficient disk space on node1.
ClusterState result = strategy.reroute(clusterState, "reroute");
assertThat(result, equalTo(clusterState));
assertThat(result.routingTable().index("test").getShards().get(0).primaryShard().state(), equalTo(STARTED));
assertThat(result.routingTable().index("test").getShards().get(0).primaryShard().currentNodeId(), equalTo("node1"));
assertThat(result.routingTable().index("test").getShards().get(0).primaryShard().relocatingNodeId(), nullValue());
assertThat(result.routingTable().index("test").getShards().get(1).primaryShard().state(), equalTo(RELOCATING));
assertThat(result.routingTable().index("test").getShards().get(1).primaryShard().currentNodeId(), equalTo("node1"));
assertThat(result.routingTable().index("test").getShards().get(1).primaryShard().relocatingNodeId(), equalTo("node2"));
}
public void testForSingleDataNode() {
Settings diskSettings = Settings.builder()
.put(DiskThresholdSettings.CLUSTER_ROUTING_ALLOCATION_DISK_THRESHOLD_ENABLED_SETTING.getKey(), true)
.put(DiskThresholdSettings.CLUSTER_ROUTING_ALLOCATION_INCLUDE_RELOCATIONS_SETTING.getKey(), true)
.put(DiskThresholdSettings.CLUSTER_ROUTING_ALLOCATION_LOW_DISK_WATERMARK_SETTING.getKey(), "60%")
.put(DiskThresholdSettings.CLUSTER_ROUTING_ALLOCATION_HIGH_DISK_WATERMARK_SETTING.getKey(), "70%").build();
ImmutableOpenMap.Builder<String, DiskUsage> usagesBuilder = ImmutableOpenMap.builder();
usagesBuilder.put("node1", new DiskUsage("node1", "n1", "/dev/null", 100, 100)); // 0% used
usagesBuilder.put("node2", new DiskUsage("node2", "n2", "/dev/null", 100, 20)); // 80% used
usagesBuilder.put("node3", new DiskUsage("node3", "n3", "/dev/null", 100, 100)); // 0% used
ImmutableOpenMap<String, DiskUsage> usages = usagesBuilder.build();
// We have an index with 1 primary shards each taking 40 bytes. Each node has 100 bytes available
ImmutableOpenMap.Builder<String, Long> shardSizes = ImmutableOpenMap.builder();
shardSizes.put("[test][0][p]", 40L);
shardSizes.put("[test][1][p]", 40L);
final ClusterInfo clusterInfo = new DevNullClusterInfo(usages, usages, shardSizes.build());
DiskThresholdDecider diskThresholdDecider = makeDecider(diskSettings);
MetaData metaData = MetaData.builder()
.put(IndexMetaData.builder("test").settings(settings(Version.CURRENT)).numberOfShards(2).numberOfReplicas(0))
.build();
RoutingTable initialRoutingTable = RoutingTable.builder()
.addAsNew(metaData.index("test"))
.build();
logger.info("--> adding one master node, one data node");
DiscoveryNode discoveryNode1 = new DiscoveryNode("", "node1", buildNewFakeTransportAddress(), emptyMap(),
singleton(DiscoveryNode.Role.MASTER), Version.CURRENT);
DiscoveryNode discoveryNode2 = new DiscoveryNode("", "node2", buildNewFakeTransportAddress(), emptyMap(),
singleton(DiscoveryNode.Role.DATA), Version.CURRENT);
DiscoveryNodes discoveryNodes = DiscoveryNodes.builder().add(discoveryNode1).add(discoveryNode2).build();
ClusterState baseClusterState = ClusterState.builder(ClusterName.CLUSTER_NAME_SETTING.getDefault(Settings.EMPTY))
.metaData(metaData)
.routingTable(initialRoutingTable)
.nodes(discoveryNodes)
.build();
// Two shards consumes 80% of disk space in data node, but we have only one data node, shards should remain.
ShardRouting firstRouting = TestShardRouting.newShardRouting("test", 0, "node2", null, true, ShardRoutingState.STARTED);
ShardRouting secondRouting = TestShardRouting.newShardRouting("test", 1, "node2", null, true, ShardRoutingState.STARTED);
RoutingNode firstRoutingNode = new RoutingNode("node2", discoveryNode2, firstRouting, secondRouting);
RoutingTable.Builder builder = RoutingTable.builder().add(
IndexRoutingTable.builder(firstRouting.index())
.addIndexShard(new IndexShardRoutingTable.Builder(firstRouting.shardId())
.addShard(firstRouting)
.build()
)
.addIndexShard(new IndexShardRoutingTable.Builder(secondRouting.shardId())
.addShard(secondRouting)
.build()
)
);
ClusterState clusterState = ClusterState.builder(baseClusterState).routingTable(builder.build()).build();
RoutingAllocation routingAllocation = new RoutingAllocation(null, new RoutingNodes(clusterState), clusterState, clusterInfo,
System.nanoTime(), false);
routingAllocation.debugDecision(true);
Decision decision = diskThresholdDecider.canRemain(firstRouting, firstRoutingNode, routingAllocation);
// Two shards should start happily
assertThat(decision.type(), equalTo(Decision.Type.YES));
assertThat(((Decision.Single) decision).getExplanation(), containsString("there is only a single data node present"));
ClusterInfoService cis = new ClusterInfoService() {
@Override
public ClusterInfo getClusterInfo() {
logger.info("--> calling fake getClusterInfo");
return clusterInfo;
}
@Override
public void addListener(Listener listener) {
}
};
AllocationDeciders deciders = new AllocationDeciders(Settings.EMPTY, new HashSet<>(Arrays.asList(
new SameShardAllocationDecider(
Settings.EMPTY, new ClusterSettings(Settings.EMPTY, ClusterSettings.BUILT_IN_CLUSTER_SETTINGS)
),
diskThresholdDecider
)));
AllocationService strategy = new AllocationService(Settings.builder()
.put("cluster.routing.allocation.node_concurrent_recoveries", 10)
.put(ClusterRebalanceAllocationDecider.CLUSTER_ROUTING_ALLOCATION_ALLOW_REBALANCE_SETTING.getKey(), "always")
.put("cluster.routing.allocation.cluster_concurrent_rebalance", -1)
.build(), deciders, new TestGatewayAllocator(), new BalancedShardsAllocator(Settings.EMPTY), cis);
ClusterState result = strategy.reroute(clusterState, "reroute");
assertThat(result.routingTable().index("test").getShards().get(0).primaryShard().state(), equalTo(STARTED));
assertThat(result.routingTable().index("test").getShards().get(0).primaryShard().currentNodeId(), equalTo("node2"));
assertThat(result.routingTable().index("test").getShards().get(0).primaryShard().relocatingNodeId(), nullValue());
assertThat(result.routingTable().index("test").getShards().get(1).primaryShard().state(), equalTo(STARTED));
assertThat(result.routingTable().index("test").getShards().get(1).primaryShard().currentNodeId(), equalTo("node2"));
assertThat(result.routingTable().index("test").getShards().get(1).primaryShard().relocatingNodeId(), nullValue());
// Add another datanode, it should relocate.
logger.info("--> adding node3");
DiscoveryNode discoveryNode3 = new DiscoveryNode("", "node3", buildNewFakeTransportAddress(), emptyMap(),
singleton(DiscoveryNode.Role.DATA), Version.CURRENT);
ClusterState updateClusterState = ClusterState.builder(clusterState).nodes(DiscoveryNodes.builder(clusterState.nodes())
.add(discoveryNode3)).build();
firstRouting = TestShardRouting.newShardRouting("test", 0, "node2", null, true, ShardRoutingState.STARTED);
secondRouting = TestShardRouting.newShardRouting("test", 1, "node2", "node3", true, ShardRoutingState.RELOCATING);
firstRoutingNode = new RoutingNode("node2", discoveryNode2, firstRouting, secondRouting);
builder = RoutingTable.builder().add(
IndexRoutingTable.builder(firstRouting.index())
.addIndexShard(new IndexShardRoutingTable.Builder(firstRouting.shardId())
.addShard(firstRouting)
.build()
)
.addIndexShard(new IndexShardRoutingTable.Builder(secondRouting.shardId())
.addShard(secondRouting)
.build()
)
);
clusterState = ClusterState.builder(updateClusterState).routingTable(builder.build()).build();
routingAllocation = new RoutingAllocation(null, new RoutingNodes(clusterState), clusterState, clusterInfo, System.nanoTime(),
false);
routingAllocation.debugDecision(true);
decision = diskThresholdDecider.canRemain(firstRouting, firstRoutingNode, routingAllocation);
assertThat(decision.type(), equalTo(Decision.Type.YES));
assertThat(((Decision.Single) decision).getExplanation(), containsString(
"there is enough disk on this node for the shard to remain, free: [60b]"));
result = strategy.reroute(clusterState, "reroute");
assertThat(result.routingTable().index("test").getShards().get(0).primaryShard().state(), equalTo(STARTED));
assertThat(result.routingTable().index("test").getShards().get(0).primaryShard().currentNodeId(), equalTo("node2"));
assertThat(result.routingTable().index("test").getShards().get(0).primaryShard().relocatingNodeId(), nullValue());
assertThat(result.routingTable().index("test").getShards().get(1).primaryShard().state(), equalTo(RELOCATING));
assertThat(result.routingTable().index("test").getShards().get(1).primaryShard().currentNodeId(), equalTo("node2"));
assertThat(result.routingTable().index("test").getShards().get(1).primaryShard().relocatingNodeId(), equalTo("node3"));
}
public void logShardStates(ClusterState state) {
RoutingNodes rn = state.getRoutingNodes();
logger.info("--> counts: total: {}, unassigned: {}, initializing: {}, relocating: {}, started: {}",
rn.shards(shard -> true).size(),
rn.shardsWithState(UNASSIGNED).size(),
rn.shardsWithState(INITIALIZING).size(),
rn.shardsWithState(RELOCATING).size(),
rn.shardsWithState(STARTED).size());
logger.info("--> unassigned: {}, initializing: {}, relocating: {}, started: {}",
rn.shardsWithState(UNASSIGNED),
rn.shardsWithState(INITIALIZING),
rn.shardsWithState(RELOCATING),
rn.shardsWithState(STARTED));
}
}