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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.vespa.clustercontroller.core;
import org.junit.Test;
import java.util.HashSet;
import static org.junit.Assert.assertFalse;
public class GroupAutoTakedownLiveConfigTest extends FleetControllerTest {
private static FleetControllerOptions createOptions(DistributionBuilder.GroupBuilder groupBuilder, double minNodeRatio) {
FleetControllerOptions options = defaultOptions("mycluster");
options.setStorageDistribution(DistributionBuilder.forHierarchicCluster(groupBuilder));
options.nodes = new HashSet<>(DistributionBuilder.buildConfiguredNodes(groupBuilder.totalNodeCount()));
options.minNodeRatioPerGroup = minNodeRatio;
options.maxTransitionTime = transitionTimes(0);
return options;
}
private void updateConfigLive(FleetControllerOptions newOptions) {
this.fleetController.updateOptions(newOptions);
}
private void reconfigureWithMinNodeRatio(double minNodeRatio) {
FleetControllerOptions newOptions = this.options.clone();
newOptions.minNodeRatioPerGroup = minNodeRatio;
updateConfigLive(newOptions);
}
private void reconfigureWithDistribution(DistributionBuilder.GroupBuilder groupBuilder) {
FleetControllerOptions newOptions = this.options.clone();
newOptions.nodes = new HashSet<>(DistributionBuilder.buildConfiguredNodes(groupBuilder.totalNodeCount()));
newOptions.storageDistribution = DistributionBuilder.forHierarchicCluster(groupBuilder);
updateConfigLive(newOptions);
}
private void setUp3x3ClusterWithMinNodeRatio(double minNodeRatio) throws Exception {
FleetControllerOptions options = createOptions(
DistributionBuilder.withGroups(3).eachWithNodeCount(3),
minNodeRatio);
setUpFleetController(true, options);
setUpVdsNodes(true, new DummyVdsNodeOptions(), false, 9);
waitForState("version:\\d+ distributor:9 storage:9");
}
private void takeDownContentNode(int index) {
// nodes list contains both distributors and storage nodes, with distributors
// in even positions and storage nodes in odd positions.
final int arrayIndex = index*2 + 1;
assertFalse(nodes.get(arrayIndex).isDistributor());
nodes.get(arrayIndex).disconnect();
}
@Test
public void bootstrap_min_ratio_option_is_propagated_to_group_availability_logic() throws Exception {
setUp3x3ClusterWithMinNodeRatio(0.67);
takeDownContentNode(0);
waitForStateExcludingNodeSubset("version:\\d+ distributor:9 storage:9 .0.s:d .1.s:d .2.s:d", asIntSet(0));
}
@Test
public void min_ratio_live_reconfig_immediately_takes_effect() throws Exception {
// Initially, arbitrarily many nodes may be down in a group.
setUp3x3ClusterWithMinNodeRatio(0.0);
takeDownContentNode(3);
waitForStateExcludingNodeSubset("version:\\d+ distributor:9 storage:9 .3.s:d", asIntSet(3));
reconfigureWithMinNodeRatio(0.67);
waitForStateExcludingNodeSubset("version:\\d+ distributor:9 storage:9 .3.s:d .4.s:d .5.s:d", asIntSet(3));
reconfigureWithMinNodeRatio(0.0);
// Aaaand back up again!
waitForStateExcludingNodeSubset("version:\\d+ distributor:9 storage:9 .3.s:d", asIntSet(3));
}
@Test
public void live_distribution_config_changes_trigger_cluster_state_change() throws Exception {
setUp3x3ClusterWithMinNodeRatio(0.65);
takeDownContentNode(6);
// Not enough nodes down to trigger group take-down yet
waitForStateExcludingNodeSubset("version:\\d+ distributor:9 storage:9 .6.s:d", asIntSet(6));
// Removing a node from the same group as node 6 will dip it under the configured threshold,
// taking down the entire group. In this case we configure out node 8.
reconfigureWithDistribution(DistributionBuilder.withGroupNodes(3, 3, 2));
waitForStateExcludingNodeSubset("version:\\d+ distributor:8 storage:6", asIntSet(6, 8));
}
}
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