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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.routing.allocation.decider;
import org.elasticsearch.action.admin.cluster.node.stats.NodesStatsResponse;
import org.elasticsearch.action.admin.cluster.state.ClusterStateResponse;
import org.elasticsearch.cluster.ClusterInfo;
import org.elasticsearch.cluster.ClusterInfoService;
import org.elasticsearch.cluster.DiskUsage;
import org.elasticsearch.cluster.MockInternalClusterInfoService;
import org.elasticsearch.cluster.routing.RoutingNode;
import org.elasticsearch.common.unit.TimeValue;
import org.elasticsearch.plugins.Plugin;
import org.elasticsearch.test.ESIntegTestCase;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import static org.elasticsearch.common.settings.Settings.settingsBuilder;
import static org.hamcrest.Matchers.equalTo;
import static org.hamcrest.Matchers.greaterThan;
import static org.hamcrest.Matchers.greaterThanOrEqualTo;
@ESIntegTestCase.ClusterScope(scope = ESIntegTestCase.Scope.TEST, numDataNodes = 0)
public class MockDiskUsagesIT extends ESIntegTestCase {
@Override
protected Collection<Class<? extends Plugin>> nodePlugins() {
// Use the mock internal cluster info service, which has fake-able disk usages
return pluginList(MockInternalClusterInfoService.TestPlugin.class);
}
public void testRerouteOccursOnDiskPassingHighWatermark() throws Exception {
List<String> nodes = internalCluster().startNodesAsync(3).get();
// Wait for all 3 nodes to be up
assertBusy(new Runnable() {
@Override
public void run() {
NodesStatsResponse resp = client().admin().cluster().prepareNodesStats().get();
assertThat(resp.getNodes().length, equalTo(3));
}
});
// Start with all nodes at 50% usage
final MockInternalClusterInfoService cis = (MockInternalClusterInfoService)
internalCluster().getInstance(ClusterInfoService.class, internalCluster().getMasterName());
cis.setUpdateFrequency(TimeValue.timeValueMillis(200));
cis.onMaster();
cis.setN1Usage(nodes.get(0), new DiskUsage(nodes.get(0), "n1", "/dev/null", 100, 50));
cis.setN2Usage(nodes.get(1), new DiskUsage(nodes.get(1), "n2", "/dev/null", 100, 50));
cis.setN3Usage(nodes.get(2), new DiskUsage(nodes.get(2), "n3", "/dev/null", 100, 50));
client().admin().cluster().prepareUpdateSettings().setTransientSettings(settingsBuilder()
.put(DiskThresholdDecider.CLUSTER_ROUTING_ALLOCATION_LOW_DISK_WATERMARK_SETTING.getKey(), randomFrom("20b", "80%"))
.put(DiskThresholdDecider.CLUSTER_ROUTING_ALLOCATION_HIGH_DISK_WATERMARK_SETTING.getKey(), randomFrom("10b", "90%"))
.put(DiskThresholdDecider.CLUSTER_ROUTING_ALLOCATION_REROUTE_INTERVAL_SETTING.getKey(), "1ms")).get();
// Create an index with 10 shards so we can check allocation for it
prepareCreate("test").setSettings(settingsBuilder()
.put("number_of_shards", 10)
.put("number_of_replicas", 0)
.put("index.routing.allocation.exclude._name", "")).get();
ensureGreen("test");
// Block until the "fake" cluster info is retrieved at least once
assertBusy(new Runnable() {
@Override
public void run() {
ClusterInfo info = cis.getClusterInfo();
logger.info("--> got: {} nodes", info.getNodeLeastAvailableDiskUsages().size());
assertThat(info.getNodeLeastAvailableDiskUsages().size(), greaterThan(0));
}
});
final List<String> realNodeNames = new ArrayList<>();
ClusterStateResponse resp = client().admin().cluster().prepareState().get();
Iterator<RoutingNode> iter = resp.getState().getRoutingNodes().iterator();
while (iter.hasNext()) {
RoutingNode node = iter.next();
realNodeNames.add(node.nodeId());
logger.info("--> node {} has {} shards",
node.nodeId(), resp.getState().getRoutingNodes().node(node.nodeId()).numberOfOwningShards());
}
// Update the disk usages so one node has now passed the high watermark
cis.setN1Usage(realNodeNames.get(0), new DiskUsage(nodes.get(0), "n1", "_na_", 100, 50));
cis.setN2Usage(realNodeNames.get(1), new DiskUsage(nodes.get(1), "n2", "_na_", 100, 50));
cis.setN3Usage(realNodeNames.get(2), new DiskUsage(nodes.get(2), "n3", "_na_", 100, 0)); // nothing free on node3
// Retrieve the count of shards on each node
final Map<String, Integer> nodesToShardCount = new HashMap<>();
assertBusy(new Runnable() {
@Override
public void run() {
ClusterStateResponse resp = client().admin().cluster().prepareState().get();
Iterator<RoutingNode> iter = resp.getState().getRoutingNodes().iterator();
while (iter.hasNext()) {
RoutingNode node = iter.next();
logger.info("--> node {} has {} shards",
node.nodeId(), resp.getState().getRoutingNodes().node(node.nodeId()).numberOfOwningShards());
nodesToShardCount.put(node.nodeId(), resp.getState().getRoutingNodes().node(node.nodeId()).numberOfOwningShards());
}
assertThat("node1 has 5 shards", nodesToShardCount.get(realNodeNames.get(0)), equalTo(5));
assertThat("node2 has 5 shards", nodesToShardCount.get(realNodeNames.get(1)), equalTo(5));
assertThat("node3 has 0 shards", nodesToShardCount.get(realNodeNames.get(2)), equalTo(0));
}
});
// Update the disk usages so one node is now back under the high watermark
cis.setN1Usage(realNodeNames.get(0), new DiskUsage(nodes.get(0), "n1", "_na_", 100, 50));
cis.setN2Usage(realNodeNames.get(1), new DiskUsage(nodes.get(1), "n2", "_na_", 100, 50));
cis.setN3Usage(realNodeNames.get(2), new DiskUsage(nodes.get(2), "n3", "_na_", 100, 50)); // node3 has free space now
// Retrieve the count of shards on each node
nodesToShardCount.clear();
assertBusy(new Runnable() {
@Override
public void run() {
ClusterStateResponse resp = client().admin().cluster().prepareState().get();
Iterator<RoutingNode> iter = resp.getState().getRoutingNodes().iterator();
while (iter.hasNext()) {
RoutingNode node = iter.next();
logger.info("--> node {} has {} shards",
node.nodeId(), resp.getState().getRoutingNodes().node(node.nodeId()).numberOfOwningShards());
nodesToShardCount.put(node.nodeId(), resp.getState().getRoutingNodes().node(node.nodeId()).numberOfOwningShards());
}
assertThat("node1 has at least 3 shards", nodesToShardCount.get(realNodeNames.get(0)), greaterThanOrEqualTo(3));
assertThat("node2 has at least 3 shards", nodesToShardCount.get(realNodeNames.get(1)), greaterThanOrEqualTo(3));
assertThat("node3 has at least 3 shards", nodesToShardCount.get(realNodeNames.get(2)), greaterThanOrEqualTo(3));
}
});
}
}
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