/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF 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.apache.hadoop.yarn.server.nodemanager;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
import java.util.concurrent.ConcurrentSkipListMap;
import java.util.concurrent.atomic.AtomicBoolean;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.metrics2.lib.DefaultMetricsSystem;
import org.apache.hadoop.security.SecurityUtil;
import org.apache.hadoop.security.UserGroupInformation;
import org.apache.hadoop.util.ReflectionUtils;
import org.apache.hadoop.util.ShutdownHookManager;
import org.apache.hadoop.util.StringUtils;
import org.apache.hadoop.yarn.YarnException;
import org.apache.hadoop.yarn.YarnUncaughtExceptionHandler;
import org.apache.hadoop.yarn.api.records.ApplicationId;
import org.apache.hadoop.yarn.api.records.ContainerId;
import org.apache.hadoop.yarn.api.records.NodeHealthStatus;
import org.apache.hadoop.yarn.api.records.NodeId;
import org.apache.hadoop.yarn.conf.YarnConfiguration;
import org.apache.hadoop.yarn.event.AsyncDispatcher;
import org.apache.hadoop.yarn.event.Dispatcher;
import org.apache.hadoop.yarn.event.EventHandler;
import org.apache.hadoop.yarn.factory.providers.RecordFactoryProvider;
import org.apache.hadoop.yarn.server.nodemanager.containermanager.ContainerManagerImpl;
import org.apache.hadoop.yarn.server.nodemanager.containermanager.application.Application;
import org.apache.hadoop.yarn.server.nodemanager.containermanager.container.Container;
import org.apache.hadoop.yarn.server.nodemanager.metrics.NodeManagerMetrics;
import org.apache.hadoop.yarn.server.nodemanager.security.NMContainerTokenSecretManager;
import org.apache.hadoop.yarn.server.nodemanager.webapp.WebServer;
import org.apache.hadoop.yarn.server.security.ApplicationACLsManager;
import org.apache.hadoop.yarn.service.CompositeService;
import org.apache.hadoop.yarn.service.Service;
import org.apache.hadoop.yarn.util.Records;
import com.google.common.annotations.VisibleForTesting;
public class NodeManager extends CompositeService
implements EventHandler<NodeManagerEvent> {
/**
* Priority of the NodeManager shutdown hook.
*/
public static final int SHUTDOWN_HOOK_PRIORITY = 30;
/**
* Extra duration to wait for containers to be killed on shutdown.
*/
private static final int SHUTDOWN_CLEANUP_SLOP_MS = 1000;
private static final Log LOG = LogFactory.getLog(NodeManager.class);
protected final NodeManagerMetrics metrics = NodeManagerMetrics.create();
private ApplicationACLsManager aclsManager;
private NodeHealthCheckerService nodeHealthChecker;
private LocalDirsHandlerService dirsHandler;
private Context context;
private AsyncDispatcher dispatcher;
private ContainerManagerImpl containerManager;
private static CompositeServiceShutdownHook nodeManagerShutdownHook;
private long waitForContainersOnShutdownMillis;
private AtomicBoolean isStopping = new AtomicBoolean(false);
public NodeManager() {
super(NodeManager.class.getName());
}
protected NodeStatusUpdater createNodeStatusUpdater(Context context,
Dispatcher dispatcher, NodeHealthCheckerService healthChecker) {
return new NodeStatusUpdaterImpl(context, dispatcher, healthChecker,
metrics);
}
protected NodeResourceMonitor createNodeResourceMonitor() {
return new NodeResourceMonitorImpl();
}
protected ContainerManagerImpl createContainerManager(Context context,
ContainerExecutor exec, DeletionService del,
NodeStatusUpdater nodeStatusUpdater, ApplicationACLsManager aclsManager,
LocalDirsHandlerService dirsHandler) {
return new ContainerManagerImpl(context, exec, del, nodeStatusUpdater,
metrics, aclsManager, dirsHandler);
}
protected WebServer createWebServer(Context nmContext,
ResourceView resourceView, ApplicationACLsManager aclsManager,
LocalDirsHandlerService dirsHandler) {
return new WebServer(nmContext, resourceView, aclsManager, dirsHandler);
}
protected DeletionService createDeletionService(ContainerExecutor exec) {
return new DeletionService(exec);
}
protected void doSecureLogin() throws IOException {
SecurityUtil.login(getConfig(), YarnConfiguration.NM_KEYTAB,
YarnConfiguration.NM_PRINCIPAL);
}
@Override
public void init(Configuration conf) {
conf.setBoolean(Dispatcher.DISPATCHER_EXIT_ON_ERROR_KEY, true);
// Create the secretManager if need be.
NMContainerTokenSecretManager containerTokenSecretManager = null;
if (UserGroupInformation.isSecurityEnabled()) {
LOG.info("Security is enabled on NodeManager. "
+ "Creating ContainerTokenSecretManager");
containerTokenSecretManager = new NMContainerTokenSecretManager(conf);
}
this.context = new NMContext(containerTokenSecretManager);
this.aclsManager = new ApplicationACLsManager(conf);
ContainerExecutor exec = ReflectionUtils.newInstance(
conf.getClass(YarnConfiguration.NM_CONTAINER_EXECUTOR,
DefaultContainerExecutor.class, ContainerExecutor.class), conf);
try {
exec.init();
} catch (IOException e) {
throw new YarnException("Failed to initialize container executor", e);
}
DeletionService del = createDeletionService(exec);
addService(del);
// NodeManager level dispatcher
this.dispatcher = new AsyncDispatcher();
nodeHealthChecker = new NodeHealthCheckerService();
addService(nodeHealthChecker);
dirsHandler = nodeHealthChecker.getDiskHandler();
NodeStatusUpdater nodeStatusUpdater =
createNodeStatusUpdater(context, dispatcher, nodeHealthChecker);
NodeResourceMonitor nodeResourceMonitor = createNodeResourceMonitor();
addService(nodeResourceMonitor);
containerManager =
createContainerManager(context, exec, del, nodeStatusUpdater,
this.aclsManager, dirsHandler);
addService(containerManager);
Service webServer = createWebServer(context, containerManager
.getContainersMonitor(), this.aclsManager, dirsHandler);
addService(webServer);
dispatcher.register(ContainerManagerEventType.class, containerManager);
dispatcher.register(NodeManagerEventType.class, this);
addService(dispatcher);
DefaultMetricsSystem.initialize("NodeManager");
// StatusUpdater should be added last so that it get started last
// so that we make sure everything is up before registering with RM.
addService(nodeStatusUpdater);
waitForContainersOnShutdownMillis =
conf.getLong(YarnConfiguration.NM_SLEEP_DELAY_BEFORE_SIGKILL_MS,
YarnConfiguration.DEFAULT_NM_SLEEP_DELAY_BEFORE_SIGKILL_MS) +
conf.getLong(YarnConfiguration.NM_PROCESS_KILL_WAIT_MS,
YarnConfiguration.DEFAULT_NM_PROCESS_KILL_WAIT_MS) +
SHUTDOWN_CLEANUP_SLOP_MS;
super.init(conf);
// TODO add local dirs to del
}
@Override
public void start() {
try {
doSecureLogin();
} catch (IOException e) {
throw new YarnException("Failed NodeManager login", e);
}
super.start();
}
@Override
public void stop() {
if (isStopping.getAndSet(true)) {
return;
}
cleanupContainers();
super.stop();
DefaultMetricsSystem.shutdown();
}
@SuppressWarnings("unchecked")
protected void cleanupContainers() {
Map<ContainerId, Container> containers = context.getContainers();
if (containers.isEmpty()) {
return;
}
LOG.info("Containers still running on shutdown: " + containers.keySet());
List<ContainerId> containerIds = new ArrayList<ContainerId>(containers.keySet());
dispatcher.getEventHandler().handle(
new CMgrCompletedContainersEvent(containerIds,
CMgrCompletedContainersEvent.Reason.ON_SHUTDOWN));
LOG.info("Waiting for containers to be killed");
long waitStartTime = System.currentTimeMillis();
while (!containers.isEmpty() &&
System.currentTimeMillis() - waitStartTime < waitForContainersOnShutdownMillis) {
try {
Thread.sleep(1000);
} catch (InterruptedException ex) {
LOG.warn("Interrupted while sleeping on container kill", ex);
}
}
// All containers killed
if (containers.isEmpty()) {
LOG.info("All containers in DONE state");
} else {
LOG.info("Done waiting for containers to be killed. Still alive: " +
containers.keySet());
}
}
public static class NMContext implements Context {
private final NodeId nodeId = Records.newRecord(NodeId.class);
private final ConcurrentMap<ApplicationId, Application> applications =
new ConcurrentHashMap<ApplicationId, Application>();
private final ConcurrentMap<ContainerId, Container> containers =
new ConcurrentSkipListMap<ContainerId, Container>();
private final NMContainerTokenSecretManager containerTokenSecretManager;
private final NodeHealthStatus nodeHealthStatus = RecordFactoryProvider
.getRecordFactory(null).newRecordInstance(NodeHealthStatus.class);
public NMContext(NMContainerTokenSecretManager containerTokenSecretManager) {
this.containerTokenSecretManager = containerTokenSecretManager;
this.nodeHealthStatus.setIsNodeHealthy(true);
this.nodeHealthStatus.setHealthReport("Healthy");
this.nodeHealthStatus.setLastHealthReportTime(System.currentTimeMillis());
}
/**
* Usable only after ContainerManager is started.
*/
@Override
public NodeId getNodeId() {
return this.nodeId;
}
@Override
public ConcurrentMap<ApplicationId, Application> getApplications() {
return this.applications;
}
@Override
public ConcurrentMap<ContainerId, Container> getContainers() {
return this.containers;
}
@Override
public NMContainerTokenSecretManager getContainerTokenSecretManager() {
return this.containerTokenSecretManager;
}
@Override
public NodeHealthStatus getNodeHealthStatus() {
return this.nodeHealthStatus;
}
}
/**
* @return the node health checker
*/
public NodeHealthCheckerService getNodeHealthChecker() {
return nodeHealthChecker;
}
private void reboot() {
LOG.info("Rebooting the node manager.");
NodeManager nodeManager = createNewNodeManager();
nodeManager.initAndStartNodeManager(this.getConfig(), true);
}
private void initAndStartNodeManager(Configuration conf, boolean hasToReboot) {
try {
// Remove the old hook if we are rebooting.
if (hasToReboot && null != nodeManagerShutdownHook) {
ShutdownHookManager.get().removeShutdownHook(nodeManagerShutdownHook);
}
nodeManagerShutdownHook = new CompositeServiceShutdownHook(this);
ShutdownHookManager.get().addShutdownHook(nodeManagerShutdownHook,
SHUTDOWN_HOOK_PRIORITY);
this.init(conf);
this.start();
} catch (Throwable t) {
LOG.fatal("Error starting NodeManager", t);
System.exit(-1);
}
}
@Override
public void handle(NodeManagerEvent event) {
switch (event.getType()) {
case SHUTDOWN:
stop();
break;
case REBOOT:
stop();
reboot();
break;
default:
LOG.warn("Invalid shutdown event " + event.getType() + ". Ignoring.");
}
}
// For testing
NodeManager createNewNodeManager() {
return new NodeManager();
}
// For testing
ContainerManagerImpl getContainerManager() {
return containerManager;
}
@VisibleForTesting
Context getNMContext() {
return this.context;
}
public static void main(String[] args) {
Thread.setDefaultUncaughtExceptionHandler(new YarnUncaughtExceptionHandler());
StringUtils.startupShutdownMessage(NodeManager.class, args, LOG);
NodeManager nodeManager = new NodeManager();
Configuration conf = new YarnConfiguration();
nodeManager.initAndStartNodeManager(conf, false);
}
}