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// Copyright 2018 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.vespa.hosted.provision.provisioning;
import com.google.common.collect.Iterators;
import com.yahoo.component.Version;
import com.yahoo.config.provision.ApplicationId;
import com.yahoo.config.provision.Capacity;
import com.yahoo.config.provision.ClusterSpec;
import com.yahoo.config.provision.HostName;
import com.yahoo.config.provision.HostSpec;
import com.yahoo.config.provision.NodeResources;
import com.yahoo.config.provision.NodeType;
import com.yahoo.transaction.NestedTransaction;
import com.yahoo.vespa.hosted.provision.Node;
import com.yahoo.vespa.hosted.provision.lb.LoadBalancer;
import com.yahoo.vespa.hosted.provision.lb.LoadBalancerInstance;
import com.yahoo.vespa.hosted.provision.lb.Real;
import com.yahoo.vespa.hosted.provision.node.Agent;
import com.yahoo.vespa.hosted.provision.node.IP;
import org.junit.Test;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Optional;
import java.util.Set;
import java.util.function.Supplier;
import java.util.stream.Collectors;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertSame;
import static org.junit.Assert.assertTrue;
/**
* @author mpolden
*/
public class LoadBalancerProvisionerTest {
private final ApplicationId app1 = ApplicationId.from("tenant1", "application1", "default");
private final ApplicationId app2 = ApplicationId.from("tenant2", "application2", "default");
private final ApplicationId infraApp1 = ApplicationId.from("vespa", "tenant-host", "default");
private ProvisioningTester tester = new ProvisioningTester.Builder().build();
@Test
public void provision_load_balancer() {
Supplier<List<LoadBalancer>> lbApp1 = () -> tester.nodeRepository().loadBalancers().owner(app1).asList();
Supplier<List<LoadBalancer>> lbApp2 = () -> tester.nodeRepository().loadBalancers().owner(app2).asList();
ClusterSpec.Id containerCluster1 = ClusterSpec.Id.from("qrs1");
ClusterSpec.Id contentCluster = ClusterSpec.Id.from("content");
// Provision a load balancer for each application
var nodes = prepare(app1,
clusterRequest(ClusterSpec.Type.container, containerCluster1),
clusterRequest(ClusterSpec.Type.content, contentCluster));
assertEquals(1, lbApp1.get().size());
assertEquals("Prepare provisions load balancer with reserved nodes", 2, lbApp1.get().get(0).instance().reals().size());
tester.activate(app1, nodes);
tester.activate(app2, prepare(app2, clusterRequest(ClusterSpec.Type.container, ClusterSpec.Id.from("qrs"))));
assertEquals(1, lbApp2.get().size());
// Reals are configured after activation
assertEquals(app1, lbApp1.get().get(0).id().application());
assertEquals(containerCluster1, lbApp1.get().get(0).id().cluster());
assertEquals(Collections.singleton(4443), lbApp1.get().get(0).instance().ports());
assertEquals("127.0.0.1", get(lbApp1.get().get(0).instance().reals(), 0).ipAddress());
assertEquals(4080, get(lbApp1.get().get(0).instance().reals(), 0).port());
assertEquals("127.0.0.2", get(lbApp1.get().get(0).instance().reals(), 1).ipAddress());
assertEquals(4080, get(lbApp1.get().get(0).instance().reals(), 1).port());
// A container is failed
Supplier<List<Node>> containers = () -> tester.getNodes(app1).type(ClusterSpec.Type.container).asList();
Node toFail = containers.get().get(0);
tester.nodeRepository().fail(toFail.hostname(), Agent.system, this.getClass().getSimpleName());
// Redeploying replaces failed node and removes it from load balancer
tester.activate(app1, prepare(app1,
clusterRequest(ClusterSpec.Type.container, containerCluster1),
clusterRequest(ClusterSpec.Type.content, contentCluster)));
LoadBalancer loadBalancer = tester.nodeRepository().loadBalancers().owner(app1).asList().get(0);
assertEquals(2, loadBalancer.instance().reals().size());
assertTrue("Failed node is removed", loadBalancer.instance().reals().stream()
.map(Real::hostname)
.map(HostName::value)
.noneMatch(hostname -> hostname.equals(toFail.hostname())));
assertEquals(containers.get().get(0).hostname(), get(loadBalancer.instance().reals(), 0).hostname().value());
assertEquals(containers.get().get(1).hostname(), get(loadBalancer.instance().reals(), 1).hostname().value());
assertSame("State is unchanged", LoadBalancer.State.active, loadBalancer.state());
// Add another container cluster
ClusterSpec.Id containerCluster2 = ClusterSpec.Id.from("qrs2");
tester.activate(app1, prepare(app1,
clusterRequest(ClusterSpec.Type.container, containerCluster1),
clusterRequest(ClusterSpec.Type.container, containerCluster2),
clusterRequest(ClusterSpec.Type.content, contentCluster)));
// Load balancer is provisioned for second container cluster
assertEquals(2, lbApp1.get().size());
List<HostName> activeContainers = tester.getNodes(app1, Node.State.active)
.type(ClusterSpec.Type.container).asList()
.stream()
.map(Node::hostname)
.map(HostName::from)
.sorted()
.collect(Collectors.toList());
List<HostName> reals = lbApp1.get().stream()
.map(LoadBalancer::instance)
.map(LoadBalancerInstance::reals)
.flatMap(Collection::stream)
.map(Real::hostname)
.sorted()
.collect(Collectors.toList());
assertEquals(activeContainers, reals);
// Application is removed, nodes and load balancer are deactivated
NestedTransaction removeTransaction = new NestedTransaction();
tester.provisioner().remove(removeTransaction, app1);
removeTransaction.commit();
dirtyNodesOf(app1);
assertTrue("No nodes are allocated to " + app1, tester.nodeRepository().getNodes(app1, Node.State.reserved, Node.State.active).isEmpty());
assertEquals(2, lbApp1.get().size());
assertTrue("Deactivated load balancers", lbApp1.get().stream().allMatch(lb -> lb.state() == LoadBalancer.State.inactive));
assertTrue("Load balancers for " + app2 + " remain active", lbApp2.get().stream().allMatch(lb -> lb.state() == LoadBalancer.State.active));
// Application is redeployed with one cluster and load balancer is re-activated
tester.activate(app1, prepare(app1,
clusterRequest(ClusterSpec.Type.container, containerCluster1),
clusterRequest(ClusterSpec.Type.content, contentCluster)));
assertSame("Re-activated load balancer for " + containerCluster1, LoadBalancer.State.active,
lbApp1.get().stream()
.filter(lb -> lb.id().cluster().equals(containerCluster1))
.map(LoadBalancer::state)
.findFirst()
.orElseThrow());
}
@Test
public void provision_load_balancers_with_dynamic_node_provisioning() {
var nodes = prepare(app1, Capacity.fromCount(2, new NodeResources(1, 1, 1, 0.3), false, true),
true,
clusterRequest(ClusterSpec.Type.container, ClusterSpec.Id.from("qrs")));
Supplier<LoadBalancer> lb = () -> tester.nodeRepository().loadBalancers().owner(app1).asList().get(0);
assertTrue("Load balancer provisioned with empty reals", tester.loadBalancerService().instances().get(lb.get().id()).reals().isEmpty());
assignIps(tester.nodeRepository().getNodes(app1));
tester.activate(app1, nodes);
assertFalse("Load balancer is reconfigured with reals", tester.loadBalancerService().instances().get(lb.get().id()).reals().isEmpty());
// Application is removed, nodes are deleted and load balancer is deactivated
NestedTransaction removeTransaction = new NestedTransaction();
tester.provisioner().remove(removeTransaction, app1);
removeTransaction.commit();
tester.nodeRepository().database().removeNodes(tester.nodeRepository().getNodes());
assertTrue("Nodes are deleted", tester.nodeRepository().getNodes().isEmpty());
assertSame("Load balancer is deactivated", LoadBalancer.State.inactive, lb.get().state());
// Application is redeployed
nodes = prepare(app1, Capacity.fromCount(2, new NodeResources(1, 1, 1, 0.3), false, true),
true,
clusterRequest(ClusterSpec.Type.container, ClusterSpec.Id.from("qrs")));
assertTrue("Load balancer is reconfigured with empty reals", tester.loadBalancerService().instances().get(lb.get().id()).reals().isEmpty());
assignIps(tester.nodeRepository().getNodes(app1));
tester.activate(app1, nodes);
assertFalse("Load balancer is reconfigured with reals", tester.loadBalancerService().instances().get(lb.get().id()).reals().isEmpty());
}
@Test
public void does_not_provision_load_balancers_for_non_tenant_node_type() {
tester.activate(infraApp1, prepare(infraApp1, Capacity.fromRequiredNodeType(NodeType.host),
false,
clusterRequest(ClusterSpec.Type.container,
ClusterSpec.Id.from("tenant-host"))));
assertTrue("No load balancer provisioned", tester.loadBalancerService().instances().isEmpty());
assertEquals(List.of(), tester.nodeRepository().loadBalancers().owner(infraApp1).asList());
}
@Test
public void does_not_provision_load_balancers_for_non_container_cluster() {
tester.activate(app1, prepare(app1, clusterRequest(ClusterSpec.Type.content,
ClusterSpec.Id.from("tenant-host"))));
assertTrue("No load balancer provisioned", tester.loadBalancerService().instances().isEmpty());
assertEquals(List.of(), tester.nodeRepository().loadBalancers().owner(app1).asList());
}
private void dirtyNodesOf(ApplicationId application) {
tester.nodeRepository().setDirty(tester.nodeRepository().getNodes(application), Agent.system, this.getClass().getSimpleName());
}
private Set<HostSpec> prepare(ApplicationId application, ClusterSpec... specs) {
return prepare(application, Capacity.fromCount(2, new NodeResources(1, 1, 1, 0.3), false, true), false, specs);
}
private Set<HostSpec> prepare(ApplicationId application, Capacity capacity, boolean dynamicDockerNodes, ClusterSpec... specs) {
if (dynamicDockerNodes) {
makeDynamicDockerNodes(specs.length * 2, capacity.type());
} else {
tester.makeReadyNodes(specs.length * 2, "d-1-1-1", capacity.type());
}
Set<HostSpec> allNodes = new LinkedHashSet<>();
for (ClusterSpec spec : specs) {
allNodes.addAll(tester.prepare(application, spec, capacity, 1, false));
}
return allNodes;
}
private void makeDynamicDockerNodes(int n, NodeType nodeType) {
List<Node> nodes = new ArrayList<>(n);
for (int i = 1; i <= n; i++) {
var node = Node.createDockerNode(Set.of(), Set.of(), "node" + i, Optional.empty(),
NodeResources.fromLegacyName("d-1-1-1"), nodeType);
nodes.add(node);
}
nodes = tester.nodeRepository().database().addNodesInState(nodes, Node.State.reserved);
nodes = tester.nodeRepository().setDirty(nodes, Agent.system, getClass().getSimpleName());
tester.nodeRepository().setReady(nodes, Agent.system, getClass().getSimpleName());
}
private void assignIps(List<Node> nodes) {
try (var lock = tester.nodeRepository().lockAllocation()) {
for (int i = 0; i < nodes.size(); i++) {
tester.nodeRepository().write(nodes.get(i).with(IP.Config.EMPTY.with(Set.of("127.0.0." + i))), lock);
}
}
}
private static ClusterSpec clusterRequest(ClusterSpec.Type type, ClusterSpec.Id id) {
return ClusterSpec.request(type, id, Version.fromString("6.42"), false);
}
private static <T> T get(Set<T> set, int position) {
return Iterators.get(set.iterator(), position, null);
}
}
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