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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.hosted.provision.maintenance;
import com.yahoo.component.Vtag;
import com.yahoo.config.provision.ApplicationId;
import com.yahoo.config.provision.ClusterSpec;
import com.yahoo.config.provision.HostSpec;
import com.yahoo.config.provision.NodeResources;
import com.yahoo.vespa.hosted.provision.Node;
import com.yahoo.vespa.hosted.provision.lb.LoadBalancer;
import com.yahoo.vespa.hosted.provision.lb.LoadBalancerId;
import com.yahoo.vespa.hosted.provision.node.Agent;
import com.yahoo.vespa.hosted.provision.provisioning.ProvisioningTester;
import org.junit.Test;
import java.time.Duration;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.function.Supplier;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertNotSame;
import static org.junit.Assert.assertSame;
import static org.junit.Assert.assertTrue;
/**
* @author mpolden
*/
public class LoadBalancerExpirerTest {
private final ProvisioningTester tester = new ProvisioningTester.Builder().build();
@Test
public void expire_inactive() {
LoadBalancerExpirer expirer = new LoadBalancerExpirer(tester.nodeRepository(),
Duration.ofDays(1),
tester.loadBalancerService(),
new TestMetric());
Supplier<Map<LoadBalancerId, LoadBalancer>> loadBalancers = () -> tester.nodeRepository().database().readLoadBalancers((ignored) -> true);
// Deploy two applications with a total of three load balancers
ClusterSpec.Id cluster1 = ClusterSpec.Id.from("qrs");
ClusterSpec.Id cluster2 = ClusterSpec.Id.from("qrs2");
ApplicationId app1 = ProvisioningTester.applicationId();
ApplicationId app2 = ProvisioningTester.applicationId();
LoadBalancerId lb1 = new LoadBalancerId(app1, cluster1);
LoadBalancerId lb2 = new LoadBalancerId(app2, cluster1);
LoadBalancerId lb3 = new LoadBalancerId(app2, cluster2);
deployApplication(app1, cluster1);
deployApplication(app2, cluster1, cluster2);
assertEquals(3, loadBalancers.get().size());
// Remove one application deactivates load balancers for that application
tester.remove(app1);
assertSame(LoadBalancer.State.inactive, loadBalancers.get().get(lb1).state());
assertNotSame(LoadBalancer.State.inactive, loadBalancers.get().get(lb2).state());
// Expirer defers removal while nodes are still allocated to application
tester.move(Node.State.ready, tester.nodeRepository().nodes().list(Node.State.dirty).asList());
expirer.maintain();
assertEquals(Set.of(), tester.loadBalancerService().instances().get(lb1).reals());
assertEquals(Set.of(), loadBalancers.get().get(lb1).instance().get().reals());
// Expirer defers removal of load balancer until expiration time passes
expirer.maintain();
assertSame(LoadBalancer.State.inactive, loadBalancers.get().get(lb1).state());
assertTrue("Inactive load balancer not removed", tester.loadBalancerService().instances().containsKey(lb1));
// Expirer removes load balancers once expiration time passes
tester.clock().advance(Duration.ofHours(1).plus(Duration.ofSeconds(1)));
expirer.maintain();
assertFalse("Inactive load balancer removed", tester.loadBalancerService().instances().containsKey(lb1));
// Active load balancer is left alone
assertSame(LoadBalancer.State.active, loadBalancers.get().get(lb2).state());
assertTrue("Active load balancer is not removed", tester.loadBalancerService().instances().containsKey(lb2));
// A single cluster is removed
deployApplication(app2, cluster1);
expirer.maintain();
assertSame(LoadBalancer.State.inactive, loadBalancers.get().get(lb3).state());
// Expirer defers removal while nodes are still allocated to cluster
expirer.maintain();
assertEquals(2, tester.loadBalancerService().instances().size());
removeNodesOf(app2, cluster2);
// Expirer removes load balancer for removed cluster
tester.clock().advance(Duration.ofHours(1).plus(Duration.ofSeconds(1)));
expirer.maintain();
assertFalse("Inactive load balancer removed", tester.loadBalancerService().instances().containsKey(lb3));
}
@Test
public void expire_reserved() {
LoadBalancerExpirer expirer = new LoadBalancerExpirer(tester.nodeRepository(),
Duration.ofDays(1),
tester.loadBalancerService(),
new TestMetric());
Supplier<Map<LoadBalancerId, LoadBalancer>> loadBalancers = () -> tester.nodeRepository().database().readLoadBalancers((ignored) -> true);
// Prepare application
ClusterSpec.Id cluster = ClusterSpec.Id.from("qrs");
ApplicationId app = ProvisioningTester.applicationId();
LoadBalancerId lb = new LoadBalancerId(app, cluster);
deployApplication(app, false, cluster);
// Provisions load balancer in reserved
assertSame(LoadBalancer.State.reserved, loadBalancers.get().get(lb).state());
// Expirer does nothing
expirer.maintain();
assertSame(LoadBalancer.State.reserved, loadBalancers.get().get(lb).state());
// Application never activates and nodes are dirtied and readied. Expirer moves load balancer to inactive after timeout
removeNodesOf(app, cluster);
tester.clock().advance(Duration.ofHours(1).plus(Duration.ofSeconds(1)));
expirer.maintain();
assertSame(LoadBalancer.State.inactive, loadBalancers.get().get(lb).state());
// Expirer does nothing as inactive expiration time has not yet passed
expirer.maintain();
assertSame(LoadBalancer.State.inactive, loadBalancers.get().get(lb).state());
// Expirer removes inactive load balancer
tester.clock().advance(Duration.ofHours(1).plus(Duration.ofSeconds(1)));
expirer.maintain();
assertFalse("Inactive load balancer removed", loadBalancers.get().containsKey(lb));
}
private void removeNodesOf(ApplicationId application, ClusterSpec.Id cluster) {
var nodes = tester.nodeRepository().nodes().list()
.owner(application)
.cluster(cluster)
.asList();
nodes = tester.nodeRepository().nodes().deallocate(nodes, Agent.system, getClass().getSimpleName());
tester.move(Node.State.ready, nodes);
}
private void deployApplication(ApplicationId application, ClusterSpec.Id... clusters) {
deployApplication(application, true, clusters);
}
private void deployApplication(ApplicationId application, boolean activate, ClusterSpec.Id... clusters) {
tester.makeReadyNodes(10, new NodeResources(1, 4, 10, 0.3));
List<HostSpec> hosts = new ArrayList<>();
for (var cluster : clusters) {
hosts.addAll(tester.prepare(application, ClusterSpec.request(ClusterSpec.Type.container, cluster).vespaVersion(Vtag.currentVersion).build(),
2, 1,
new NodeResources(1, 4, 10, 0.3)));
}
if (activate) {
tester.activate(application, hosts);
}
}
}
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