public void testLocalNodeMasterListenerCallbacks() throws Exception {
Settings settings =
Settings.builder()
.put("discovery.type", "zen")
.put("discovery.zen.minimum_master_nodes", 1)
.put(ZenDiscovery.PING_TIMEOUT_SETTING.getKey(), "400ms")
.put("discovery.initial_state_timeout", "500ms")
.build();
String node_0 = internalCluster().startNode(settings);
ClusterService clusterService = internalCluster().getInstance(ClusterService.class);
MasterAwareService testService = internalCluster().getInstance(MasterAwareService.class);
ClusterHealthResponse clusterHealth =
client()
.admin()
.cluster()
.prepareHealth()
.setWaitForEvents(Priority.LANGUID)
.setWaitForNodes("1")
.get();
assertThat(clusterHealth.isTimedOut(), equalTo(false));
// the first node should be a master as the minimum required is 1
assertThat(clusterService.state().nodes().getMasterNode(), notNullValue());
assertThat(clusterService.state().nodes().isLocalNodeElectedMaster(), is(true));
assertThat(testService.master(), is(true));
String node_1 = internalCluster().startNode(settings);
final ClusterService clusterService1 =
internalCluster().getInstance(ClusterService.class, node_1);
MasterAwareService testService1 =
internalCluster().getInstance(MasterAwareService.class, node_1);
clusterHealth =
client()
.admin()
.cluster()
.prepareHealth()
.setWaitForEvents(Priority.LANGUID)
.setWaitForNodes("2")
.get();
assertThat(clusterHealth.isTimedOut(), equalTo(false));
// the second node should not be the master as node1 is already the master.
assertThat(clusterService1.state().nodes().isLocalNodeElectedMaster(), is(false));
assertThat(testService1.master(), is(false));
internalCluster().stopCurrentMasterNode();
clusterHealth =
client()
.admin()
.cluster()
.prepareHealth()
.setWaitForEvents(Priority.LANGUID)
.setWaitForNodes("1")
.get();
assertThat(clusterHealth.isTimedOut(), equalTo(false));
// now that node0 is closed, node1 should be elected as master
assertThat(clusterService1.state().nodes().isLocalNodeElectedMaster(), is(true));
assertThat(testService1.master(), is(true));
// start another node and set min_master_node
internalCluster().startNode(Settings.builder().put(settings));
assertFalse(client().admin().cluster().prepareHealth().setWaitForNodes("2").get().isTimedOut());
Settings transientSettings =
Settings.builder().put("discovery.zen.minimum_master_nodes", 2).build();
client()
.admin()
.cluster()
.prepareUpdateSettings()
.setTransientSettings(transientSettings)
.get();
// and shutdown the second node
internalCluster().stopRandomNonMasterNode();
// there should not be any master as the minimum number of required eligible masters is not met
awaitBusy(
() ->
clusterService1.state().nodes().getMasterNode() == null
&& clusterService1.state().status() == ClusterState.ClusterStateStatus.APPLIED);
assertThat(testService1.master(), is(false));
// bring the node back up
String node_2 =
internalCluster().startNode(Settings.builder().put(settings).put(transientSettings));
ClusterService clusterService2 = internalCluster().getInstance(ClusterService.class, node_2);
MasterAwareService testService2 =
internalCluster().getInstance(MasterAwareService.class, node_2);
// make sure both nodes see each other otherwise the masternode below could be null if node 2 is
// master and node 1 did'r receive
// the updated cluster state...
assertThat(
internalCluster()
.client(node_1)
.admin()
.cluster()
.prepareHealth()
.setWaitForEvents(Priority.LANGUID)
.setLocal(true)
.setWaitForNodes("2")
.get()
.isTimedOut(),
is(false));
assertThat(
internalCluster()
.client(node_2)
.admin()
.cluster()
.prepareHealth()
.setWaitForEvents(Priority.LANGUID)
.setLocal(true)
.setWaitForNodes("2")
.get()
.isTimedOut(),
is(false));
// now that we started node1 again, a new master should be elected
assertThat(clusterService2.state().nodes().getMasterNode(), is(notNullValue()));
if (node_2.equals(clusterService2.state().nodes().getMasterNode().getName())) {
assertThat(testService1.master(), is(false));
assertThat(testService2.master(), is(true));
} else {
assertThat(testService1.master(), is(true));
assertThat(testService2.master(), is(false));
}
}
@Test
public void testLocalNodeMasterListenerCallbacks() throws Exception {
Settings settings =
settingsBuilder()
.put("discovery.type", "zen")
.put("discovery.zen.minimum_master_nodes", 1)
.put("discovery.zen.ping_timeout", "400ms")
.put("discovery.initial_state_timeout", "500ms")
.put("plugin.types", TestPlugin.class.getName())
.build();
internalCluster().startNode(settings);
ClusterService clusterService = internalCluster().getInstance(ClusterService.class);
MasterAwareService testService = internalCluster().getInstance(MasterAwareService.class);
ClusterHealthResponse clusterHealth =
client()
.admin()
.cluster()
.prepareHealth()
.setWaitForEvents(Priority.LANGUID)
.setWaitForNodes("1")
.get();
assertThat(clusterHealth.isTimedOut(), equalTo(false));
// the first node should be a master as the minimum required is 1
assertThat(clusterService.state().nodes().masterNode(), notNullValue());
assertThat(clusterService.state().nodes().localNodeMaster(), is(true));
assertThat(testService.master(), is(true));
String node_1 = internalCluster().startNode(settings);
final ClusterService clusterService1 =
internalCluster().getInstance(ClusterService.class, node_1);
MasterAwareService testService1 =
internalCluster().getInstance(MasterAwareService.class, node_1);
clusterHealth =
client()
.admin()
.cluster()
.prepareHealth()
.setWaitForEvents(Priority.LANGUID)
.setWaitForNodes("2")
.get();
assertThat(clusterHealth.isTimedOut(), equalTo(false));
// the second node should not be the master as node1 is already the master.
assertThat(clusterService1.state().nodes().localNodeMaster(), is(false));
assertThat(testService1.master(), is(false));
internalCluster().stopCurrentMasterNode();
clusterHealth =
client()
.admin()
.cluster()
.prepareHealth()
.setWaitForEvents(Priority.LANGUID)
.setWaitForNodes("1")
.get();
assertThat(clusterHealth.isTimedOut(), equalTo(false));
// now that node1 is closed, node2 should be elected as master
assertThat(clusterService1.state().nodes().localNodeMaster(), is(true));
assertThat(testService1.master(), is(true));
Settings transientSettings =
settingsBuilder().put("discovery.zen.minimum_master_nodes", 2).build();
client()
.admin()
.cluster()
.prepareUpdateSettings()
.setTransientSettings(transientSettings)
.get();
// there should not be any master as the minimum number of required eligible masters is not met
awaitBusy(
new Predicate<Object>() {
public boolean apply(Object obj) {
return clusterService1.state().nodes().masterNode() == null;
}
});
assertThat(testService1.master(), is(false));
String node_2 =
internalCluster()
.startNode(ImmutableSettings.builder().put(settings).put(transientSettings));
ClusterService clusterService2 = internalCluster().getInstance(ClusterService.class, node_2);
MasterAwareService testService2 =
internalCluster().getInstance(MasterAwareService.class, node_2);
// make sure both nodes see each other otherwise the masternode below could be null if node 2 is
// master and node 1 did'r receive the updated cluster state...
assertThat(
internalCluster()
.client(node_1)
.admin()
.cluster()
.prepareHealth()
.setWaitForEvents(Priority.LANGUID)
.setLocal(true)
.setWaitForNodes("2")
.get()
.isTimedOut(),
is(false));
assertThat(
internalCluster()
.client(node_2)
.admin()
.cluster()
.prepareHealth()
.setWaitForEvents(Priority.LANGUID)
.setLocal(true)
.setWaitForNodes("2")
.get()
.isTimedOut(),
is(false));
// now that we started node1 again, a new master should be elected
assertThat(clusterService2.state().nodes().masterNode(), is(notNullValue()));
if (node_2.equals(clusterService2.state().nodes().masterNode().name())) {
assertThat(testService1.master(), is(false));
assertThat(testService2.master(), is(true));
} else {
assertThat(testService1.master(), is(true));
assertThat(testService2.master(), is(false));
}
}