YARN-1964. Create Docker analog of the LinuxContainerExecutor in YARN
This commit is contained in:
Ravi Prakash
parent
46f6f9d60d
commit
53f64ee516
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@ -124,6 +124,7 @@
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<item name="YARN Commands" href="hadoop-yarn/hadoop-yarn-site/YarnCommands.html"/>
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<item name="Scheduler Load Simulator" href="hadoop-sls/SchedulerLoadSimulator.html"/>
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<item name="NodeManager Restart" href="hadoop-yarn/hadoop-yarn-site/NodeManagerRestart.html"/>
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<item name="DockerContainerExecutor" href="hadoop-yarn/hadoop-yarn-site/DockerContainerExecutor.html"/>
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</menu>
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<menu name="YARN REST APIs" inherit="top">
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@ -89,6 +89,9 @@ Release 2.6.0 - 2014-11-15
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NEW FEATURES
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YARN-1964. Create Docker analog of the LinuxContainerExecutor in YARN. (Abin
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Shahab via raviprak)
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YARN-2131. Add a way to format the RMStateStore. (Robert Kanter via kasha)
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YARN-1367. Changed NM to not kill containers on NM resync if RM work-preserving
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@ -891,7 +891,19 @@ public class YarnConfiguration extends Configuration {
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/** The arguments to pass to the health check script.*/
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public static final String NM_HEALTH_CHECK_SCRIPT_OPTS =
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NM_PREFIX + "health-checker.script.opts";
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/** The Docker image name(For DockerContainerExecutor).*/
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public static final String NM_DOCKER_CONTAINER_EXECUTOR_IMAGE_NAME =
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NM_PREFIX + "docker-container-executor.image-name";
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/** The name of the docker executor (For DockerContainerExecutor).*/
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public static final String NM_DOCKER_CONTAINER_EXECUTOR_EXEC_NAME =
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NM_PREFIX + "docker-container-executor.exec-name";
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/** The default docker executor (For DockerContainerExecutor).*/
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public static final String NM_DEFAULT_DOCKER_CONTAINER_EXECUTOR_EXEC_NAME =
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"/usr/bin/docker";
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/** The path to the Linux container executor.*/
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public static final String NM_LINUX_CONTAINER_EXECUTOR_PATH =
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NM_PREFIX + "linux-container-executor.path";
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@ -23,7 +23,7 @@
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<!-- there. If yarn-site.xml does not already exist, create it. -->
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<configuration>
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<!-- IPC Configs -->
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<property>
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<description>Factory to create client IPC classes.</description>
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@ -1146,6 +1146,16 @@
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<value>${hadoop.tmp.dir}/yarn-nm-recovery</value>
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</property>
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<!--Docker configuration-->
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<property>
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<name>yarn.nodemanager.docker-container-executor.exec-name</name>
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<value>/usr/bin/docker</value>
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<description>
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Name or path to the Docker client.
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</description>
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</property>
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<!--Map Reduce configuration-->
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<property>
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<name>yarn.nodemanager.aux-services.mapreduce_shuffle.class</name>
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@ -20,10 +20,13 @@ package org.apache.hadoop.yarn.server.nodemanager;
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import java.io.File;
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import java.io.IOException;
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import java.io.OutputStream;
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import java.io.PrintStream;
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import java.net.InetSocketAddress;
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import java.util.ArrayList;
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import java.util.Arrays;
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import java.util.List;
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import java.util.Map;
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import java.util.concurrent.ConcurrentHashMap;
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import java.util.concurrent.ConcurrentMap;
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import java.util.concurrent.locks.ReentrantReadWriteLock;
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@ -211,6 +214,34 @@ public abstract class ContainerExecutor implements Configurable {
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}
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}
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public void writeLaunchEnv(OutputStream out, Map<String, String> environment, Map<Path, List<String>> resources, List<String> command) throws IOException{
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ContainerLaunch.ShellScriptBuilder sb = ContainerLaunch.ShellScriptBuilder.create();
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if (environment != null) {
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for (Map.Entry<String,String> env : environment.entrySet()) {
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sb.env(env.getKey().toString(), env.getValue().toString());
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}
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}
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if (resources != null) {
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for (Map.Entry<Path,List<String>> entry : resources.entrySet()) {
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for (String linkName : entry.getValue()) {
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sb.symlink(entry.getKey(), new Path(linkName));
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}
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}
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}
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sb.command(command);
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PrintStream pout = null;
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try {
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pout = new PrintStream(out);
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sb.write(pout);
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} finally {
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if (out != null) {
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out.close();
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}
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}
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}
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public enum ExitCode {
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FORCE_KILLED(137),
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TERMINATED(143),
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@ -0,0 +1,794 @@
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/**
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.apache.hadoop.yarn.server.nodemanager;
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import com.google.common.annotations.VisibleForTesting;
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import com.google.common.base.Joiner;
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import com.google.common.base.Preconditions;
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import com.google.common.base.Strings;
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import org.apache.commons.logging.Log;
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import org.apache.commons.logging.LogFactory;
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import org.apache.hadoop.fs.CommonConfigurationKeys;
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import org.apache.hadoop.fs.FileContext;
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import org.apache.hadoop.fs.Path;
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import org.apache.hadoop.fs.UnsupportedFileSystemException;
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import org.apache.hadoop.fs.permission.FsPermission;
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import org.apache.hadoop.io.IOUtils;
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import org.apache.hadoop.util.Shell;
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import org.apache.hadoop.util.Shell.ShellCommandExecutor;
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import org.apache.hadoop.util.StringUtils;
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import org.apache.hadoop.yarn.api.ApplicationConstants;
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import org.apache.hadoop.yarn.api.records.ContainerId;
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import org.apache.hadoop.yarn.conf.YarnConfiguration;
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import org.apache.hadoop.yarn.factory.providers.RecordFactoryProvider;
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import org.apache.hadoop.yarn.server.nodemanager.containermanager.container.Container;
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import org.apache.hadoop.yarn.server.nodemanager.containermanager.container.ContainerDiagnosticsUpdateEvent;
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import org.apache.hadoop.yarn.server.nodemanager.containermanager.launcher.ContainerLaunch;
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import org.apache.hadoop.yarn.server.nodemanager.containermanager.localizer.ContainerLocalizer;
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import org.apache.hadoop.yarn.util.ConverterUtils;
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import java.io.ByteArrayOutputStream;
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import java.io.DataOutputStream;
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import java.io.File;
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import java.io.IOException;
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import java.io.OutputStream;
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import java.io.PrintStream;
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import java.util.ArrayList;
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import java.util.Collections;
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import java.util.EnumSet;
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import java.util.HashSet;
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import java.util.List;
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import java.util.Map;
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import java.util.Random;
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import java.util.Set;
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import java.util.regex.Pattern;
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import java.net.InetSocketAddress;
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import static org.apache.hadoop.fs.CreateFlag.CREATE;
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import static org.apache.hadoop.fs.CreateFlag.OVERWRITE;
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/**
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* This executor will launch a docker container and run the task inside the container.
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*/
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public class DockerContainerExecutor extends ContainerExecutor {
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private static final Log LOG = LogFactory
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.getLog(DockerContainerExecutor.class);
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public static final String DOCKER_CONTAINER_EXECUTOR_SCRIPT = "docker_container_executor";
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public static final String DOCKER_CONTAINER_EXECUTOR_SESSION_SCRIPT = "docker_container_executor_session";
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// This validates that the image is a proper docker image and would not crash docker.
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public static final String DOCKER_IMAGE_PATTERN = "^(([\\w\\.-]+)(:\\d+)*\\/)?[\\w\\.:-]+$";
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private final FileContext lfs;
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private final Pattern dockerImagePattern;
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public DockerContainerExecutor() {
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try {
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this.lfs = FileContext.getLocalFSFileContext();
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this.dockerImagePattern = Pattern.compile(DOCKER_IMAGE_PATTERN);
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} catch (UnsupportedFileSystemException e) {
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throw new RuntimeException(e);
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}
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}
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protected void copyFile(Path src, Path dst, String owner) throws IOException {
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lfs.util().copy(src, dst);
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}
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@Override
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public void init() throws IOException {
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String auth = getConf().get(CommonConfigurationKeys.HADOOP_SECURITY_AUTHENTICATION);
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if (auth != null && !auth.equals("simple")) {
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throw new IllegalStateException("DockerContainerExecutor only works with simple authentication mode");
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}
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String dockerExecutor = getConf().get(YarnConfiguration.NM_DOCKER_CONTAINER_EXECUTOR_EXEC_NAME,
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YarnConfiguration.NM_DEFAULT_DOCKER_CONTAINER_EXECUTOR_EXEC_NAME);
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if (!new File(dockerExecutor).exists()) {
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throw new IllegalStateException("Invalid docker exec path: " + dockerExecutor);
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}
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}
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@Override
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public synchronized void startLocalizer(Path nmPrivateContainerTokensPath,
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InetSocketAddress nmAddr, String user, String appId, String locId,
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LocalDirsHandlerService dirsHandler)
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throws IOException, InterruptedException {
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List<String> localDirs = dirsHandler.getLocalDirs();
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List<String> logDirs = dirsHandler.getLogDirs();
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ContainerLocalizer localizer =
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new ContainerLocalizer(lfs, user, appId, locId, getPaths(localDirs),
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RecordFactoryProvider.getRecordFactory(getConf()));
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createUserLocalDirs(localDirs, user);
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createUserCacheDirs(localDirs, user);
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createAppDirs(localDirs, user, appId);
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createAppLogDirs(appId, logDirs, user);
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// randomly choose the local directory
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Path appStorageDir = getWorkingDir(localDirs, user, appId);
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String tokenFn = String.format(ContainerLocalizer.TOKEN_FILE_NAME_FMT, locId);
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Path tokenDst = new Path(appStorageDir, tokenFn);
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copyFile(nmPrivateContainerTokensPath, tokenDst, user);
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LOG.info("Copying from " + nmPrivateContainerTokensPath + " to " + tokenDst);
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lfs.setWorkingDirectory(appStorageDir);
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LOG.info("CWD set to " + appStorageDir + " = " + lfs.getWorkingDirectory());
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// TODO: DO it over RPC for maintaining similarity?
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localizer.runLocalization(nmAddr);
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}
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@Override
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public int launchContainer(Container container,
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Path nmPrivateContainerScriptPath, Path nmPrivateTokensPath,
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String userName, String appId, Path containerWorkDir,
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List<String> localDirs, List<String> logDirs) throws IOException {
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String containerImageName = container.getLaunchContext().getEnvironment()
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.get(YarnConfiguration.NM_DOCKER_CONTAINER_EXECUTOR_IMAGE_NAME);
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if (LOG.isDebugEnabled()) {
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LOG.debug("containerImageName from launchContext: " + containerImageName);
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}
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Preconditions.checkArgument(!Strings.isNullOrEmpty(containerImageName), "Container image must not be null");
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containerImageName = containerImageName.replaceAll("['\"]", "");
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Preconditions.checkArgument(saneDockerImage(containerImageName), "Image: " + containerImageName + " is not a proper docker image");
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String dockerExecutor = getConf().get(YarnConfiguration.NM_DOCKER_CONTAINER_EXECUTOR_EXEC_NAME,
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YarnConfiguration.NM_DEFAULT_DOCKER_CONTAINER_EXECUTOR_EXEC_NAME);
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FsPermission dirPerm = new FsPermission(APPDIR_PERM);
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ContainerId containerId = container.getContainerId();
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// create container dirs on all disks
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String containerIdStr = ConverterUtils.toString(containerId);
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String appIdStr =
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ConverterUtils.toString(
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containerId.getApplicationAttemptId().
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getApplicationId());
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for (String sLocalDir : localDirs) {
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Path usersdir = new Path(sLocalDir, ContainerLocalizer.USERCACHE);
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Path userdir = new Path(usersdir, userName);
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Path appCacheDir = new Path(userdir, ContainerLocalizer.APPCACHE);
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Path appDir = new Path(appCacheDir, appIdStr);
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Path containerDir = new Path(appDir, containerIdStr);
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createDir(containerDir, dirPerm, true, userName);
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}
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// Create the container log-dirs on all disks
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createContainerLogDirs(appIdStr, containerIdStr, logDirs, userName);
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Path tmpDir = new Path(containerWorkDir,
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YarnConfiguration.DEFAULT_CONTAINER_TEMP_DIR);
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createDir(tmpDir, dirPerm, false, userName);
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// copy launch script to work dir
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Path launchDst =
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new Path(containerWorkDir, ContainerLaunch.CONTAINER_SCRIPT);
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lfs.util().copy(nmPrivateContainerScriptPath, launchDst);
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// copy container tokens to work dir
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Path tokenDst =
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new Path(containerWorkDir, ContainerLaunch.FINAL_CONTAINER_TOKENS_FILE);
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lfs.util().copy(nmPrivateTokensPath, tokenDst);
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String localDirMount = toMount(localDirs);
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String logDirMount = toMount(logDirs);
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String containerWorkDirMount = toMount(Collections.singletonList(containerWorkDir.toUri().getPath()));
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StringBuilder commands = new StringBuilder();
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String commandStr = commands.append(dockerExecutor)
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.append(" ")
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.append("run")
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.append(" ")
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.append("--rm --net=host")
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.append(" ")
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.append(" --name " + containerIdStr)
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.append(localDirMount)
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.append(logDirMount)
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.append(containerWorkDirMount)
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.append(" ")
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.append(containerImageName)
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.toString();
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String dockerPidScript = "`" + dockerExecutor + " inspect --format {{.State.Pid}} " + containerIdStr + "`";
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// Create new local launch wrapper script
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LocalWrapperScriptBuilder sb =
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new UnixLocalWrapperScriptBuilder(containerWorkDir, commandStr, dockerPidScript);
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Path pidFile = getPidFilePath(containerId);
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if (pidFile != null) {
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sb.writeLocalWrapperScript(launchDst, pidFile);
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} else {
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LOG.info("Container " + containerIdStr
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+ " was marked as inactive. Returning terminated error");
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return ExitCode.TERMINATED.getExitCode();
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}
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ShellCommandExecutor shExec = null;
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try {
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lfs.setPermission(launchDst,
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ContainerExecutor.TASK_LAUNCH_SCRIPT_PERMISSION);
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lfs.setPermission(sb.getWrapperScriptPath(),
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ContainerExecutor.TASK_LAUNCH_SCRIPT_PERMISSION);
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// Setup command to run
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String[] command = getRunCommand(sb.getWrapperScriptPath().toString(),
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containerIdStr, userName, pidFile, this.getConf());
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if (LOG.isDebugEnabled()) {
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LOG.debug("launchContainer: " + commandStr + " " + Joiner.on(" ").join(command));
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}
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shExec = new ShellCommandExecutor(
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command,
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new File(containerWorkDir.toUri().getPath()),
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container.getLaunchContext().getEnvironment()); // sanitized env
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if (isContainerActive(containerId)) {
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shExec.execute();
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} else {
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LOG.info("Container " + containerIdStr +
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" was marked as inactive. Returning terminated error");
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return ExitCode.TERMINATED.getExitCode();
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}
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} catch (IOException e) {
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if (null == shExec) {
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return -1;
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}
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int exitCode = shExec.getExitCode();
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LOG.warn("Exit code from container " + containerId + " is : " + exitCode);
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// 143 (SIGTERM) and 137 (SIGKILL) exit codes means the container was
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// terminated/killed forcefully. In all other cases, log the
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// container-executor's output
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if (exitCode != ExitCode.FORCE_KILLED.getExitCode()
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&& exitCode != ExitCode.TERMINATED.getExitCode()) {
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LOG.warn("Exception from container-launch with container ID: "
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+ containerId + " and exit code: " + exitCode, e);
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logOutput(shExec.getOutput());
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String diagnostics = "Exception from container-launch: \n"
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+ StringUtils.stringifyException(e) + "\n" + shExec.getOutput();
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container.handle(new ContainerDiagnosticsUpdateEvent(containerId,
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diagnostics));
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} else {
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container.handle(new ContainerDiagnosticsUpdateEvent(containerId,
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"Container killed on request. Exit code is " + exitCode));
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}
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return exitCode;
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} finally {
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if (shExec != null) {
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shExec.close();
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}
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}
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return 0;
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}
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@Override
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public void writeLaunchEnv(OutputStream out, Map<String, String> environment, Map<Path, List<String>> resources, List<String> command) throws IOException {
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ContainerLaunch.ShellScriptBuilder sb = ContainerLaunch.ShellScriptBuilder.create();
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Set<String> exclusionSet = new HashSet<String>();
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exclusionSet.add(YarnConfiguration.NM_DOCKER_CONTAINER_EXECUTOR_IMAGE_NAME);
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exclusionSet.add(ApplicationConstants.Environment.HADOOP_YARN_HOME.name());
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exclusionSet.add(ApplicationConstants.Environment.HADOOP_COMMON_HOME.name());
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exclusionSet.add(ApplicationConstants.Environment.HADOOP_HDFS_HOME.name());
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exclusionSet.add(ApplicationConstants.Environment.HADOOP_CONF_DIR.name());
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exclusionSet.add(ApplicationConstants.Environment.JAVA_HOME.name());
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if (environment != null) {
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for (Map.Entry<String,String> env : environment.entrySet()) {
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if (!exclusionSet.contains(env.getKey())) {
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sb.env(env.getKey().toString(), env.getValue().toString());
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}
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}
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}
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if (resources != null) {
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for (Map.Entry<Path,List<String>> entry : resources.entrySet()) {
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for (String linkName : entry.getValue()) {
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sb.symlink(entry.getKey(), new Path(linkName));
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}
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}
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}
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sb.command(command);
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PrintStream pout = null;
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PrintStream ps = null;
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ByteArrayOutputStream baos = new ByteArrayOutputStream();
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try {
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pout = new PrintStream(out);
|
||||
if (LOG.isDebugEnabled()) {
|
||||
ps = new PrintStream(baos);
|
||||
sb.write(ps);
|
||||
}
|
||||
sb.write(pout);
|
||||
|
||||
} finally {
|
||||
if (out != null) {
|
||||
out.close();
|
||||
}
|
||||
if (ps != null) {
|
||||
ps.close();
|
||||
}
|
||||
}
|
||||
if (LOG.isDebugEnabled()) {
|
||||
LOG.debug("Script: " + baos.toString());
|
||||
}
|
||||
}
|
||||
|
||||
private boolean saneDockerImage(String containerImageName) {
|
||||
return dockerImagePattern.matcher(containerImageName).matches();
|
||||
}
|
||||
|
||||
@Override
|
||||
public boolean signalContainer(String user, String pid, Signal signal)
|
||||
throws IOException {
|
||||
if (LOG.isDebugEnabled()) {
|
||||
LOG.debug("Sending signal " + signal.getValue() + " to pid " + pid
|
||||
+ " as user " + user);
|
||||
}
|
||||
if (!containerIsAlive(pid)) {
|
||||
return false;
|
||||
}
|
||||
try {
|
||||
killContainer(pid, signal);
|
||||
} catch (IOException e) {
|
||||
if (!containerIsAlive(pid)) {
|
||||
return false;
|
||||
}
|
||||
throw e;
|
||||
}
|
||||
return true;
|
||||
}
|
||||
|
||||
@Override
|
||||
public boolean isContainerProcessAlive(String user, String pid)
|
||||
throws IOException {
|
||||
return containerIsAlive(pid);
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns true if the process with the specified pid is alive.
|
||||
*
|
||||
* @param pid String pid
|
||||
* @return boolean true if the process is alive
|
||||
*/
|
||||
@VisibleForTesting
|
||||
public static boolean containerIsAlive(String pid) throws IOException {
|
||||
try {
|
||||
new ShellCommandExecutor(Shell.getCheckProcessIsAliveCommand(pid))
|
||||
.execute();
|
||||
// successful execution means process is alive
|
||||
return true;
|
||||
}
|
||||
catch (Shell.ExitCodeException e) {
|
||||
// failure (non-zero exit code) means process is not alive
|
||||
return false;
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Send a specified signal to the specified pid
|
||||
*
|
||||
* @param pid the pid of the process [group] to signal.
|
||||
* @param signal signal to send
|
||||
* (for logging).
|
||||
*/
|
||||
protected void killContainer(String pid, Signal signal) throws IOException {
|
||||
new ShellCommandExecutor(Shell.getSignalKillCommand(signal.getValue(), pid))
|
||||
.execute();
|
||||
}
|
||||
|
||||
@Override
|
||||
public void deleteAsUser(String user, Path subDir, Path... baseDirs)
|
||||
throws IOException, InterruptedException {
|
||||
if (baseDirs == null || baseDirs.length == 0) {
|
||||
LOG.info("Deleting absolute path : " + subDir);
|
||||
if (!lfs.delete(subDir, true)) {
|
||||
//Maybe retry
|
||||
LOG.warn("delete returned false for path: [" + subDir + "]");
|
||||
}
|
||||
return;
|
||||
}
|
||||
for (Path baseDir : baseDirs) {
|
||||
Path del = subDir == null ? baseDir : new Path(baseDir, subDir);
|
||||
LOG.info("Deleting path : " + del);
|
||||
if (!lfs.delete(del, true)) {
|
||||
LOG.warn("delete returned false for path: [" + del + "]");
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Converts a directory list to a docker mount string
|
||||
* @param dirs
|
||||
* @return a string of mounts for docker
|
||||
*/
|
||||
private String toMount(List<String> dirs) {
|
||||
StringBuilder builder = new StringBuilder();
|
||||
for (String dir : dirs) {
|
||||
builder.append(" -v " + dir + ":" + dir);
|
||||
}
|
||||
return builder.toString();
|
||||
}
|
||||
|
||||
private abstract class LocalWrapperScriptBuilder {
|
||||
|
||||
private final Path wrapperScriptPath;
|
||||
|
||||
public Path getWrapperScriptPath() {
|
||||
return wrapperScriptPath;
|
||||
}
|
||||
|
||||
public void writeLocalWrapperScript(Path launchDst, Path pidFile) throws IOException {
|
||||
DataOutputStream out = null;
|
||||
PrintStream pout = null;
|
||||
|
||||
try {
|
||||
out = lfs.create(wrapperScriptPath, EnumSet.of(CREATE, OVERWRITE));
|
||||
pout = new PrintStream(out);
|
||||
writeLocalWrapperScript(launchDst, pidFile, pout);
|
||||
} finally {
|
||||
IOUtils.cleanup(LOG, pout, out);
|
||||
}
|
||||
}
|
||||
|
||||
protected abstract void writeLocalWrapperScript(Path launchDst, Path pidFile,
|
||||
PrintStream pout);
|
||||
|
||||
protected LocalWrapperScriptBuilder(Path containerWorkDir) {
|
||||
this.wrapperScriptPath = new Path(containerWorkDir,
|
||||
Shell.appendScriptExtension(DOCKER_CONTAINER_EXECUTOR_SCRIPT));
|
||||
}
|
||||
}
|
||||
|
||||
private final class UnixLocalWrapperScriptBuilder
|
||||
extends LocalWrapperScriptBuilder {
|
||||
private final Path sessionScriptPath;
|
||||
private final String dockerCommand;
|
||||
private final String dockerPidScript;
|
||||
|
||||
public UnixLocalWrapperScriptBuilder(Path containerWorkDir, String dockerCommand, String dockerPidScript) {
|
||||
super(containerWorkDir);
|
||||
this.dockerCommand = dockerCommand;
|
||||
this.dockerPidScript = dockerPidScript;
|
||||
this.sessionScriptPath = new Path(containerWorkDir,
|
||||
Shell.appendScriptExtension(DOCKER_CONTAINER_EXECUTOR_SESSION_SCRIPT));
|
||||
}
|
||||
|
||||
@Override
|
||||
public void writeLocalWrapperScript(Path launchDst, Path pidFile)
|
||||
throws IOException {
|
||||
writeSessionScript(launchDst, pidFile);
|
||||
super.writeLocalWrapperScript(launchDst, pidFile);
|
||||
}
|
||||
|
||||
@Override
|
||||
public void writeLocalWrapperScript(Path launchDst, Path pidFile,
|
||||
PrintStream pout) {
|
||||
|
||||
String exitCodeFile = ContainerLaunch.getExitCodeFile(
|
||||
pidFile.toString());
|
||||
String tmpFile = exitCodeFile + ".tmp";
|
||||
pout.println("#!/usr/bin/env bash");
|
||||
pout.println("bash \"" + sessionScriptPath.toString() + "\"");
|
||||
pout.println("rc=$?");
|
||||
pout.println("echo $rc > \"" + tmpFile + "\"");
|
||||
pout.println("mv -f \"" + tmpFile + "\" \"" + exitCodeFile + "\"");
|
||||
pout.println("exit $rc");
|
||||
}
|
||||
|
||||
private void writeSessionScript(Path launchDst, Path pidFile)
|
||||
throws IOException {
|
||||
DataOutputStream out = null;
|
||||
PrintStream pout = null;
|
||||
try {
|
||||
out = lfs.create(sessionScriptPath, EnumSet.of(CREATE, OVERWRITE));
|
||||
pout = new PrintStream(out);
|
||||
// We need to do a move as writing to a file is not atomic
|
||||
// Process reading a file being written to may get garbled data
|
||||
// hence write pid to tmp file first followed by a mv
|
||||
pout.println("#!/usr/bin/env bash");
|
||||
pout.println();
|
||||
pout.println("echo "+ dockerPidScript +" > " + pidFile.toString() + ".tmp");
|
||||
pout.println("/bin/mv -f " + pidFile.toString() + ".tmp " + pidFile);
|
||||
pout.println(dockerCommand + " bash \"" +
|
||||
launchDst.toUri().getPath().toString() + "\"");
|
||||
} finally {
|
||||
IOUtils.cleanup(LOG, pout, out);
|
||||
}
|
||||
lfs.setPermission(sessionScriptPath,
|
||||
ContainerExecutor.TASK_LAUNCH_SCRIPT_PERMISSION);
|
||||
}
|
||||
}
|
||||
|
||||
protected void createDir(Path dirPath, FsPermission perms,
|
||||
boolean createParent, String user) throws IOException {
|
||||
lfs.mkdir(dirPath, perms, createParent);
|
||||
if (!perms.equals(perms.applyUMask(lfs.getUMask()))) {
|
||||
lfs.setPermission(dirPath, perms);
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Initialize the local directories for a particular user.
|
||||
* <ul>.mkdir
|
||||
* <li>$local.dir/usercache/$user</li>
|
||||
* </ul>
|
||||
*/
|
||||
void createUserLocalDirs(List<String> localDirs, String user)
|
||||
throws IOException {
|
||||
boolean userDirStatus = false;
|
||||
FsPermission userperms = new FsPermission(USER_PERM);
|
||||
for (String localDir : localDirs) {
|
||||
// create $local.dir/usercache/$user and its immediate parent
|
||||
try {
|
||||
createDir(getUserCacheDir(new Path(localDir), user), userperms, true, user);
|
||||
} catch (IOException e) {
|
||||
LOG.warn("Unable to create the user directory : " + localDir, e);
|
||||
continue;
|
||||
}
|
||||
userDirStatus = true;
|
||||
}
|
||||
if (!userDirStatus) {
|
||||
throw new IOException("Not able to initialize user directories "
|
||||
+ "in any of the configured local directories for user " + user);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* Initialize the local cache directories for a particular user.
|
||||
* <ul>
|
||||
* <li>$local.dir/usercache/$user</li>
|
||||
* <li>$local.dir/usercache/$user/appcache</li>
|
||||
* <li>$local.dir/usercache/$user/filecache</li>
|
||||
* </ul>
|
||||
*/
|
||||
void createUserCacheDirs(List<String> localDirs, String user)
|
||||
throws IOException {
|
||||
LOG.info("Initializing user " + user);
|
||||
|
||||
boolean appcacheDirStatus = false;
|
||||
boolean distributedCacheDirStatus = false;
|
||||
FsPermission appCachePerms = new FsPermission(APPCACHE_PERM);
|
||||
FsPermission fileperms = new FsPermission(FILECACHE_PERM);
|
||||
|
||||
for (String localDir : localDirs) {
|
||||
// create $local.dir/usercache/$user/appcache
|
||||
Path localDirPath = new Path(localDir);
|
||||
final Path appDir = getAppcacheDir(localDirPath, user);
|
||||
try {
|
||||
createDir(appDir, appCachePerms, true, user);
|
||||
appcacheDirStatus = true;
|
||||
} catch (IOException e) {
|
||||
LOG.warn("Unable to create app cache directory : " + appDir, e);
|
||||
}
|
||||
// create $local.dir/usercache/$user/filecache
|
||||
final Path distDir = getFileCacheDir(localDirPath, user);
|
||||
try {
|
||||
createDir(distDir, fileperms, true, user);
|
||||
distributedCacheDirStatus = true;
|
||||
} catch (IOException e) {
|
||||
LOG.warn("Unable to create file cache directory : " + distDir, e);
|
||||
}
|
||||
}
|
||||
if (!appcacheDirStatus) {
|
||||
throw new IOException("Not able to initialize app-cache directories "
|
||||
+ "in any of the configured local directories for user " + user);
|
||||
}
|
||||
if (!distributedCacheDirStatus) {
|
||||
throw new IOException(
|
||||
"Not able to initialize distributed-cache directories "
|
||||
+ "in any of the configured local directories for user "
|
||||
+ user);
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Initialize the local directories for a particular user.
|
||||
* <ul>
|
||||
* <li>$local.dir/usercache/$user/appcache/$appid</li>
|
||||
* </ul>
|
||||
* @param localDirs
|
||||
*/
|
||||
void createAppDirs(List<String> localDirs, String user, String appId)
|
||||
throws IOException {
|
||||
boolean initAppDirStatus = false;
|
||||
FsPermission appperms = new FsPermission(APPDIR_PERM);
|
||||
for (String localDir : localDirs) {
|
||||
Path fullAppDir = getApplicationDir(new Path(localDir), user, appId);
|
||||
// create $local.dir/usercache/$user/appcache/$appId
|
||||
try {
|
||||
createDir(fullAppDir, appperms, true, user);
|
||||
initAppDirStatus = true;
|
||||
} catch (IOException e) {
|
||||
LOG.warn("Unable to create app directory " + fullAppDir.toString(), e);
|
||||
}
|
||||
}
|
||||
if (!initAppDirStatus) {
|
||||
throw new IOException("Not able to initialize app directories "
|
||||
+ "in any of the configured local directories for app "
|
||||
+ appId.toString());
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* Create application log directories on all disks.
|
||||
*/
|
||||
void createContainerLogDirs(String appId, String containerId,
|
||||
List<String> logDirs, String user) throws IOException {
|
||||
|
||||
boolean containerLogDirStatus = false;
|
||||
FsPermission containerLogDirPerms = new FsPermission(LOGDIR_PERM);
|
||||
for (String rootLogDir : logDirs) {
|
||||
// create $log.dir/$appid/$containerid
|
||||
Path appLogDir = new Path(rootLogDir, appId);
|
||||
Path containerLogDir = new Path(appLogDir, containerId);
|
||||
try {
|
||||
createDir(containerLogDir, containerLogDirPerms, true, user);
|
||||
} catch (IOException e) {
|
||||
LOG.warn("Unable to create the container-log directory : "
|
||||
+ appLogDir, e);
|
||||
continue;
|
||||
}
|
||||
containerLogDirStatus = true;
|
||||
}
|
||||
if (!containerLogDirStatus) {
|
||||
throw new IOException(
|
||||
"Not able to initialize container-log directories "
|
||||
+ "in any of the configured local directories for container "
|
||||
+ containerId);
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Permissions for user dir.
|
||||
* $local.dir/usercache/$user
|
||||
*/
|
||||
static final short USER_PERM = (short) 0750;
|
||||
/**
|
||||
* Permissions for user appcache dir.
|
||||
* $local.dir/usercache/$user/appcache
|
||||
*/
|
||||
static final short APPCACHE_PERM = (short) 0710;
|
||||
/**
|
||||
* Permissions for user filecache dir.
|
||||
* $local.dir/usercache/$user/filecache
|
||||
*/
|
||||
static final short FILECACHE_PERM = (short) 0710;
|
||||
/**
|
||||
* Permissions for user app dir.
|
||||
* $local.dir/usercache/$user/appcache/$appId
|
||||
*/
|
||||
static final short APPDIR_PERM = (short) 0710;
|
||||
/**
|
||||
* Permissions for user log dir.
|
||||
* $logdir/$user/$appId
|
||||
*/
|
||||
static final short LOGDIR_PERM = (short) 0710;
|
||||
|
||||
private long getDiskFreeSpace(Path base) throws IOException {
|
||||
return lfs.getFsStatus(base).getRemaining();
|
||||
}
|
||||
|
||||
private Path getApplicationDir(Path base, String user, String appId) {
|
||||
return new Path(getAppcacheDir(base, user), appId);
|
||||
}
|
||||
|
||||
private Path getUserCacheDir(Path base, String user) {
|
||||
return new Path(new Path(base, ContainerLocalizer.USERCACHE), user);
|
||||
}
|
||||
|
||||
private Path getAppcacheDir(Path base, String user) {
|
||||
return new Path(getUserCacheDir(base, user),
|
||||
ContainerLocalizer.APPCACHE);
|
||||
}
|
||||
|
||||
private Path getFileCacheDir(Path base, String user) {
|
||||
return new Path(getUserCacheDir(base, user),
|
||||
ContainerLocalizer.FILECACHE);
|
||||
}
|
||||
|
||||
protected Path getWorkingDir(List<String> localDirs, String user,
|
||||
String appId) throws IOException {
|
||||
Path appStorageDir = null;
|
||||
long totalAvailable = 0L;
|
||||
long[] availableOnDisk = new long[localDirs.size()];
|
||||
int i = 0;
|
||||
// randomly choose the app directory
|
||||
// the chance of picking a directory is proportional to
|
||||
// the available space on the directory.
|
||||
// firstly calculate the sum of all available space on these directories
|
||||
for (String localDir : localDirs) {
|
||||
Path curBase = getApplicationDir(new Path(localDir),
|
||||
user, appId);
|
||||
long space = 0L;
|
||||
try {
|
||||
space = getDiskFreeSpace(curBase);
|
||||
} catch (IOException e) {
|
||||
LOG.warn("Unable to get Free Space for " + curBase.toString(), e);
|
||||
}
|
||||
availableOnDisk[i++] = space;
|
||||
totalAvailable += space;
|
||||
}
|
||||
|
||||
// throw an IOException if totalAvailable is 0.
|
||||
if (totalAvailable <= 0L) {
|
||||
throw new IOException("Not able to find a working directory for "
|
||||
+ user);
|
||||
}
|
||||
|
||||
// make probability to pick a directory proportional to
|
||||
// the available space on the directory.
|
||||
Random r = new Random();
|
||||
long randomPosition = Math.abs(r.nextLong()) % totalAvailable;
|
||||
int dir = 0;
|
||||
// skip zero available space directory,
|
||||
// because totalAvailable is greater than 0 and randomPosition
|
||||
// is less than totalAvailable, we can find a valid directory
|
||||
// with nonzero available space.
|
||||
while (availableOnDisk[dir] == 0L) {
|
||||
dir++;
|
||||
}
|
||||
while (randomPosition > availableOnDisk[dir]) {
|
||||
randomPosition -= availableOnDisk[dir++];
|
||||
}
|
||||
appStorageDir = getApplicationDir(new Path(localDirs.get(dir)),
|
||||
user, appId);
|
||||
|
||||
return appStorageDir;
|
||||
}
|
||||
|
||||
/**
|
||||
* Create application log directories on all disks.
|
||||
*/
|
||||
void createAppLogDirs(String appId, List<String> logDirs, String user)
|
||||
throws IOException {
|
||||
|
||||
boolean appLogDirStatus = false;
|
||||
FsPermission appLogDirPerms = new FsPermission(LOGDIR_PERM);
|
||||
for (String rootLogDir : logDirs) {
|
||||
// create $log.dir/$appid
|
||||
Path appLogDir = new Path(rootLogDir, appId);
|
||||
try {
|
||||
createDir(appLogDir, appLogDirPerms, true, user);
|
||||
} catch (IOException e) {
|
||||
LOG.warn("Unable to create the app-log directory : " + appLogDir, e);
|
||||
continue;
|
||||
}
|
||||
appLogDirStatus = true;
|
||||
}
|
||||
if (!appLogDirStatus) {
|
||||
throw new IOException("Not able to initialize app-log directories "
|
||||
+ "in any of the configured local directories for app " + appId);
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* @return the list of paths of given local directories
|
||||
*/
|
||||
private static List<Path> getPaths(List<String> dirs) {
|
||||
List<Path> paths = new ArrayList<Path>(dirs.size());
|
||||
for (int i = 0; i < dirs.size(); i++) {
|
||||
paths.add(new Path(dirs.get(i)));
|
||||
}
|
||||
return paths;
|
||||
}
|
||||
|
||||
}
|
||||
|
|
@ -269,7 +269,7 @@ public class ContainerLaunch implements Callable<Integer> {
|
|||
localResources, nmPrivateClasspathJarDir);
|
||||
|
||||
// Write out the environment
|
||||
writeLaunchEnv(containerScriptOutStream, environment, localResources,
|
||||
exec.writeLaunchEnv(containerScriptOutStream, environment, localResources,
|
||||
launchContext.getCommands());
|
||||
|
||||
// /////////// End of writing out container-script
|
||||
|
|
@ -502,8 +502,7 @@ public class ContainerLaunch implements Callable<Integer> {
|
|||
return context;
|
||||
}
|
||||
|
||||
@VisibleForTesting
|
||||
static abstract class ShellScriptBuilder {
|
||||
public static abstract class ShellScriptBuilder {
|
||||
public static ShellScriptBuilder create() {
|
||||
return Shell.WINDOWS ? new WindowsShellScriptBuilder() :
|
||||
new UnixShellScriptBuilder();
|
||||
|
|
@ -793,37 +792,6 @@ public class ContainerLaunch implements Callable<Integer> {
|
|||
meta.getKey(), meta.getValue(), environment);
|
||||
}
|
||||
}
|
||||
|
||||
static void writeLaunchEnv(OutputStream out,
|
||||
Map<String,String> environment, Map<Path,List<String>> resources,
|
||||
List<String> command)
|
||||
throws IOException {
|
||||
ShellScriptBuilder sb = ShellScriptBuilder.create();
|
||||
if (environment != null) {
|
||||
for (Map.Entry<String,String> env : environment.entrySet()) {
|
||||
sb.env(env.getKey().toString(), env.getValue().toString());
|
||||
}
|
||||
}
|
||||
if (resources != null) {
|
||||
for (Map.Entry<Path,List<String>> entry : resources.entrySet()) {
|
||||
for (String linkName : entry.getValue()) {
|
||||
sb.symlink(entry.getKey(), new Path(linkName));
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
sb.command(command);
|
||||
|
||||
PrintStream pout = null;
|
||||
try {
|
||||
pout = new PrintStream(out);
|
||||
sb.write(pout);
|
||||
} finally {
|
||||
if (out != null) {
|
||||
out.close();
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
public static String getExitCodeFile(String pidFile) {
|
||||
return pidFile + EXIT_CODE_FILE_SUFFIX;
|
||||
|
|
|
|||
|
|
@ -0,0 +1,213 @@
|
|||
/**
|
||||
* 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 com.google.common.base.Strings;
|
||||
import org.apache.commons.logging.Log;
|
||||
import org.apache.commons.logging.LogFactory;
|
||||
import org.apache.hadoop.conf.Configuration;
|
||||
import org.apache.hadoop.fs.FileContext;
|
||||
import org.apache.hadoop.fs.Path;
|
||||
import org.apache.hadoop.fs.permission.FsPermission;
|
||||
import org.apache.hadoop.util.Shell;
|
||||
import org.apache.hadoop.yarn.api.ApplicationConstants;
|
||||
import org.apache.hadoop.yarn.api.records.ContainerId;
|
||||
import org.apache.hadoop.yarn.api.records.ContainerLaunchContext;
|
||||
import org.apache.hadoop.yarn.conf.YarnConfiguration;
|
||||
import org.apache.hadoop.yarn.server.nodemanager.containermanager.container.Container;
|
||||
import org.apache.hadoop.yarn.util.ConverterUtils;
|
||||
import org.junit.After;
|
||||
import org.junit.Before;
|
||||
import org.junit.Test;
|
||||
|
||||
import java.io.File;
|
||||
import java.io.FileOutputStream;
|
||||
import java.io.FileReader;
|
||||
import java.io.IOException;
|
||||
import java.io.LineNumberReader;
|
||||
import java.io.PrintWriter;
|
||||
import java.util.ArrayList;
|
||||
import java.util.HashMap;
|
||||
import java.util.List;
|
||||
import java.util.Map;
|
||||
|
||||
import static org.junit.Assert.assertEquals;
|
||||
import static org.junit.Assert.assertTrue;
|
||||
import static org.junit.Assume.assumeTrue;
|
||||
import static org.mockito.Mockito.RETURNS_DEEP_STUBS;
|
||||
import static org.mockito.Mockito.mock;
|
||||
import static org.mockito.Mockito.when;
|
||||
|
||||
/**
|
||||
* This is intended to test the DockerContainerExecutor code, but it requires docker
|
||||
* to be installed.
|
||||
* <br><ol>
|
||||
* <li>Install docker, and Compile the code with docker-service-url set to the host and port
|
||||
* where docker service is running.
|
||||
* <br><pre><code>
|
||||
* > mvn clean install -Ddocker-service-url=tcp://0.0.0.0:4243
|
||||
* -DskipTests
|
||||
* </code></pre>
|
||||
*/
|
||||
public class TestDockerContainerExecutor {
|
||||
private static final Log LOG = LogFactory
|
||||
.getLog(TestDockerContainerExecutor.class);
|
||||
private static File workSpace = null;
|
||||
private DockerContainerExecutor exec = null;
|
||||
private LocalDirsHandlerService dirsHandler;
|
||||
private Path workDir;
|
||||
private FileContext lfs;
|
||||
private String yarnImage;
|
||||
|
||||
private int id = 0;
|
||||
private String appSubmitter;
|
||||
private String dockerUrl;
|
||||
private String testImage = "centos";
|
||||
private String dockerExec;
|
||||
private String containerIdStr;
|
||||
|
||||
|
||||
private ContainerId getNextContainerId() {
|
||||
ContainerId cId = mock(ContainerId.class, RETURNS_DEEP_STUBS);
|
||||
String id = "CONTAINER_" + System.currentTimeMillis();
|
||||
when(cId.toString()).thenReturn(id);
|
||||
return cId;
|
||||
}
|
||||
|
||||
@Before
|
||||
public void setup() {
|
||||
try {
|
||||
lfs = FileContext.getLocalFSFileContext();
|
||||
workDir = new Path("/tmp/temp-" + System.currentTimeMillis());
|
||||
workSpace = new File(workDir.toUri().getPath());
|
||||
lfs.mkdir(workDir, FsPermission.getDirDefault(), true);
|
||||
} catch (IOException e) {
|
||||
throw new RuntimeException(e);
|
||||
}
|
||||
Configuration conf = new Configuration();
|
||||
yarnImage = "yarnImage";
|
||||
long time = System.currentTimeMillis();
|
||||
conf.set(YarnConfiguration.NM_LOCAL_DIRS, "/tmp/nm-local-dir" + time);
|
||||
conf.set(YarnConfiguration.NM_LOG_DIRS, "/tmp/userlogs" + time);
|
||||
|
||||
dockerUrl = System.getProperty("docker-service-url");
|
||||
LOG.info("dockerUrl: " + dockerUrl);
|
||||
if (Strings.isNullOrEmpty(dockerUrl)) {
|
||||
return;
|
||||
}
|
||||
dockerUrl = " -H " + dockerUrl;
|
||||
dockerExec = "docker " + dockerUrl;
|
||||
conf.set(YarnConfiguration.NM_DOCKER_CONTAINER_EXECUTOR_IMAGE_NAME, yarnImage);
|
||||
conf.set(YarnConfiguration.NM_DOCKER_CONTAINER_EXECUTOR_EXEC_NAME, dockerExec);
|
||||
exec = new DockerContainerExecutor();
|
||||
dirsHandler = new LocalDirsHandlerService();
|
||||
dirsHandler.init(conf);
|
||||
exec.setConf(conf);
|
||||
appSubmitter = System.getProperty("application.submitter");
|
||||
if (appSubmitter == null || appSubmitter.isEmpty()) {
|
||||
appSubmitter = "nobody";
|
||||
}
|
||||
shellExec(dockerExec + " pull " + testImage);
|
||||
|
||||
}
|
||||
|
||||
private Shell.ShellCommandExecutor shellExec(String command) {
|
||||
try {
|
||||
|
||||
Shell.ShellCommandExecutor shExec = new Shell.ShellCommandExecutor(
|
||||
command.split("\\s+"),
|
||||
new File(workDir.toUri().getPath()),
|
||||
System.getenv());
|
||||
shExec.execute();
|
||||
return shExec;
|
||||
} catch (IOException e) {
|
||||
throw new RuntimeException(e);
|
||||
}
|
||||
}
|
||||
|
||||
private boolean shouldRun() {
|
||||
return exec != null;
|
||||
}
|
||||
|
||||
private int runAndBlock(ContainerId cId, Map<String, String> launchCtxEnv, String... cmd) throws IOException {
|
||||
String appId = "APP_" + System.currentTimeMillis();
|
||||
Container container = mock(Container.class);
|
||||
ContainerLaunchContext context = mock(ContainerLaunchContext.class);
|
||||
|
||||
when(container.getContainerId()).thenReturn(cId);
|
||||
when(container.getLaunchContext()).thenReturn(context);
|
||||
when(cId.getApplicationAttemptId().getApplicationId().toString()).thenReturn(appId);
|
||||
when(context.getEnvironment()).thenReturn(launchCtxEnv);
|
||||
|
||||
String script = writeScriptFile(launchCtxEnv, cmd);
|
||||
|
||||
Path scriptPath = new Path(script);
|
||||
Path tokensPath = new Path("/dev/null");
|
||||
Path workDir = new Path(workSpace.getAbsolutePath());
|
||||
Path pidFile = new Path(workDir, "pid.txt");
|
||||
|
||||
exec.activateContainer(cId, pidFile);
|
||||
return exec.launchContainer(container, scriptPath, tokensPath,
|
||||
appSubmitter, appId, workDir, dirsHandler.getLocalDirs(),
|
||||
dirsHandler.getLogDirs());
|
||||
}
|
||||
|
||||
private String writeScriptFile(Map<String, String> launchCtxEnv, String... cmd) throws IOException {
|
||||
File f = File.createTempFile("TestDockerContainerExecutor", ".sh");
|
||||
f.deleteOnExit();
|
||||
PrintWriter p = new PrintWriter(new FileOutputStream(f));
|
||||
for(Map.Entry<String, String> entry: launchCtxEnv.entrySet()) {
|
||||
p.println("export " + entry.getKey() + "=\"" + entry.getValue() + "\"");
|
||||
}
|
||||
for (String part : cmd) {
|
||||
p.print(part.replace("\\", "\\\\").replace("'", "\\'"));
|
||||
p.print(" ");
|
||||
}
|
||||
p.println();
|
||||
p.close();
|
||||
return f.getAbsolutePath();
|
||||
}
|
||||
|
||||
@After
|
||||
public void tearDown() {
|
||||
try {
|
||||
lfs.delete(workDir, true);
|
||||
} catch (IOException e) {
|
||||
throw new RuntimeException(e);
|
||||
}
|
||||
}
|
||||
|
||||
@Test
|
||||
public void testLaunchContainer() throws IOException {
|
||||
if (!shouldRun()) {
|
||||
LOG.warn("Docker not installed, aborting test.");
|
||||
return;
|
||||
}
|
||||
|
||||
Map<String, String> env = new HashMap<String, String>();
|
||||
env.put(YarnConfiguration.NM_DOCKER_CONTAINER_EXECUTOR_IMAGE_NAME, testImage);
|
||||
String touchFileName = "touch-file-" + System.currentTimeMillis();
|
||||
File touchFile = new File(dirsHandler.getLocalDirs().get(0), touchFileName);
|
||||
ContainerId cId = getNextContainerId();
|
||||
int ret = runAndBlock(
|
||||
cId, env, "touch", touchFile.getAbsolutePath(), "&&", "cp", touchFile.getAbsolutePath(), "/");
|
||||
|
||||
assertEquals(0, ret);
|
||||
}
|
||||
}
|
||||
|
|
@ -0,0 +1,259 @@
|
|||
/**
|
||||
* 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 com.google.common.base.Strings;
|
||||
import org.apache.commons.logging.Log;
|
||||
import org.apache.commons.logging.LogFactory;
|
||||
import org.apache.hadoop.conf.Configuration;
|
||||
import org.apache.hadoop.fs.CommonConfigurationKeys;
|
||||
import org.apache.hadoop.fs.FileContext;
|
||||
import org.apache.hadoop.fs.FileUtil;
|
||||
import org.apache.hadoop.fs.Path;
|
||||
import org.apache.hadoop.fs.permission.FsPermission;
|
||||
import org.apache.hadoop.util.Shell;
|
||||
import org.apache.hadoop.yarn.api.records.ContainerId;
|
||||
import org.apache.hadoop.yarn.api.records.ContainerLaunchContext;
|
||||
import org.apache.hadoop.yarn.conf.YarnConfiguration;
|
||||
import org.apache.hadoop.yarn.server.nodemanager.containermanager.container.Container;
|
||||
import org.junit.After;
|
||||
import org.junit.Before;
|
||||
import org.junit.Test;
|
||||
|
||||
import java.io.File;
|
||||
import java.io.FileReader;
|
||||
import java.io.IOException;
|
||||
import java.io.LineNumberReader;
|
||||
import java.util.ArrayList;
|
||||
import java.util.Arrays;
|
||||
import java.util.Collections;
|
||||
import java.util.HashMap;
|
||||
import java.util.List;
|
||||
|
||||
import static org.junit.Assert.assertEquals;
|
||||
import static org.junit.Assert.assertTrue;
|
||||
import static org.junit.Assume.assumeTrue;
|
||||
import static org.mockito.Mockito.mock;
|
||||
import static org.mockito.Mockito.when;
|
||||
import static org.mockito.Mockito.RETURNS_DEEP_STUBS;
|
||||
|
||||
/**
|
||||
* Mock tests for docker container executor
|
||||
*/
|
||||
public class TestDockerContainerExecutorWithMocks {
|
||||
|
||||
private static final Log LOG = LogFactory
|
||||
.getLog(TestDockerContainerExecutorWithMocks.class);
|
||||
public static final String DOCKER_LAUNCH_COMMAND = "/bin/true";
|
||||
private DockerContainerExecutor dockerContainerExecutor = null;
|
||||
private LocalDirsHandlerService dirsHandler;
|
||||
private Path workDir;
|
||||
private FileContext lfs;
|
||||
private String yarnImage;
|
||||
|
||||
@Before
|
||||
public void setup() {
|
||||
assumeTrue(!Path.WINDOWS);
|
||||
File f = new File("./src/test/resources/mock-container-executor");
|
||||
if(!FileUtil.canExecute(f)) {
|
||||
FileUtil.setExecutable(f, true);
|
||||
}
|
||||
String executorPath = f.getAbsolutePath();
|
||||
Configuration conf = new Configuration();
|
||||
yarnImage = "yarnImage";
|
||||
long time = System.currentTimeMillis();
|
||||
conf.set(YarnConfiguration.NM_LINUX_CONTAINER_EXECUTOR_PATH, executorPath);
|
||||
conf.set(YarnConfiguration.NM_LOCAL_DIRS, "/tmp/nm-local-dir" + time);
|
||||
conf.set(YarnConfiguration.NM_LOG_DIRS, "/tmp/userlogs" + time);
|
||||
conf.set(YarnConfiguration.NM_DOCKER_CONTAINER_EXECUTOR_IMAGE_NAME, yarnImage);
|
||||
conf.set(YarnConfiguration.NM_DOCKER_CONTAINER_EXECUTOR_EXEC_NAME , DOCKER_LAUNCH_COMMAND);
|
||||
dockerContainerExecutor = new DockerContainerExecutor();
|
||||
dirsHandler = new LocalDirsHandlerService();
|
||||
dirsHandler.init(conf);
|
||||
dockerContainerExecutor.setConf(conf);
|
||||
lfs = null;
|
||||
try {
|
||||
lfs = FileContext.getLocalFSFileContext();
|
||||
workDir = new Path("/tmp/temp-"+ System.currentTimeMillis());
|
||||
lfs.mkdir(workDir, FsPermission.getDirDefault(), true);
|
||||
} catch (IOException e) {
|
||||
throw new RuntimeException(e);
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
@After
|
||||
public void tearDown() {
|
||||
try {
|
||||
lfs.delete(workDir, true);
|
||||
} catch (IOException e) {
|
||||
throw new RuntimeException(e);
|
||||
}
|
||||
}
|
||||
|
||||
@Test(expected = IllegalStateException.class)
|
||||
public void testContainerInitSecure() throws IOException {
|
||||
dockerContainerExecutor.getConf().set(
|
||||
CommonConfigurationKeys.HADOOP_SECURITY_AUTHENTICATION, "kerberos");
|
||||
dockerContainerExecutor.init();
|
||||
}
|
||||
|
||||
@Test(expected = IllegalArgumentException.class)
|
||||
public void testContainerLaunchNullImage() throws IOException {
|
||||
String appSubmitter = "nobody";
|
||||
String appId = "APP_ID";
|
||||
String containerId = "CONTAINER_ID";
|
||||
String testImage = "";
|
||||
|
||||
Container container = mock(Container.class, RETURNS_DEEP_STUBS);
|
||||
ContainerId cId = mock(ContainerId.class, RETURNS_DEEP_STUBS);
|
||||
ContainerLaunchContext context = mock(ContainerLaunchContext.class);
|
||||
HashMap<String, String> env = new HashMap<String,String>();
|
||||
|
||||
when(container.getContainerId()).thenReturn(cId);
|
||||
when(container.getLaunchContext()).thenReturn(context);
|
||||
when(cId.getApplicationAttemptId().getApplicationId().toString()).thenReturn(appId);
|
||||
when(cId.toString()).thenReturn(containerId);
|
||||
|
||||
when(context.getEnvironment()).thenReturn(env);
|
||||
env.put(YarnConfiguration.NM_DOCKER_CONTAINER_EXECUTOR_IMAGE_NAME, testImage);
|
||||
dockerContainerExecutor.getConf()
|
||||
.set(YarnConfiguration.NM_DOCKER_CONTAINER_EXECUTOR_IMAGE_NAME, testImage);
|
||||
Path scriptPath = new Path("file:///bin/echo");
|
||||
Path tokensPath = new Path("file:///dev/null");
|
||||
|
||||
Path pidFile = new Path(workDir, "pid.txt");
|
||||
|
||||
dockerContainerExecutor.activateContainer(cId, pidFile);
|
||||
dockerContainerExecutor.launchContainer(container, scriptPath, tokensPath,
|
||||
appSubmitter, appId, workDir, dirsHandler.getLocalDirs(),
|
||||
dirsHandler.getLogDirs());
|
||||
}
|
||||
|
||||
@Test(expected = IllegalArgumentException.class)
|
||||
public void testContainerLaunchInvalidImage() throws IOException {
|
||||
String appSubmitter = "nobody";
|
||||
String appId = "APP_ID";
|
||||
String containerId = "CONTAINER_ID";
|
||||
String testImage = "testrepo.com/test-image rm -rf $HADOOP_PREFIX/*";
|
||||
|
||||
Container container = mock(Container.class, RETURNS_DEEP_STUBS);
|
||||
ContainerId cId = mock(ContainerId.class, RETURNS_DEEP_STUBS);
|
||||
ContainerLaunchContext context = mock(ContainerLaunchContext.class);
|
||||
HashMap<String, String> env = new HashMap<String,String>();
|
||||
|
||||
when(container.getContainerId()).thenReturn(cId);
|
||||
when(container.getLaunchContext()).thenReturn(context);
|
||||
when(cId.getApplicationAttemptId().getApplicationId().toString()).thenReturn(appId);
|
||||
when(cId.toString()).thenReturn(containerId);
|
||||
|
||||
when(context.getEnvironment()).thenReturn(env);
|
||||
env.put(YarnConfiguration.NM_DOCKER_CONTAINER_EXECUTOR_IMAGE_NAME, testImage);
|
||||
dockerContainerExecutor.getConf()
|
||||
.set(YarnConfiguration.NM_DOCKER_CONTAINER_EXECUTOR_IMAGE_NAME, testImage);
|
||||
Path scriptPath = new Path("file:///bin/echo");
|
||||
Path tokensPath = new Path("file:///dev/null");
|
||||
|
||||
Path pidFile = new Path(workDir, "pid.txt");
|
||||
|
||||
dockerContainerExecutor.activateContainer(cId, pidFile);
|
||||
dockerContainerExecutor.launchContainer(container, scriptPath, tokensPath,
|
||||
appSubmitter, appId, workDir, dirsHandler.getLocalDirs(),
|
||||
dirsHandler.getLogDirs());
|
||||
}
|
||||
|
||||
@Test
|
||||
public void testContainerLaunch() throws IOException {
|
||||
String appSubmitter = "nobody";
|
||||
String appId = "APP_ID";
|
||||
String containerId = "CONTAINER_ID";
|
||||
String testImage = "\"sequenceiq/hadoop-docker:2.4.1\"";
|
||||
|
||||
Container container = mock(Container.class, RETURNS_DEEP_STUBS);
|
||||
ContainerId cId = mock(ContainerId.class, RETURNS_DEEP_STUBS);
|
||||
ContainerLaunchContext context = mock(ContainerLaunchContext.class);
|
||||
HashMap<String, String> env = new HashMap<String,String>();
|
||||
|
||||
when(container.getContainerId()).thenReturn(cId);
|
||||
when(container.getLaunchContext()).thenReturn(context);
|
||||
when(cId.getApplicationAttemptId().getApplicationId().toString()).thenReturn(appId);
|
||||
when(cId.toString()).thenReturn(containerId);
|
||||
|
||||
when(context.getEnvironment()).thenReturn(env);
|
||||
env.put(YarnConfiguration.NM_DOCKER_CONTAINER_EXECUTOR_IMAGE_NAME, testImage);
|
||||
Path scriptPath = new Path("file:///bin/echo");
|
||||
Path tokensPath = new Path("file:///dev/null");
|
||||
|
||||
Path pidFile = new Path(workDir, "pid");
|
||||
|
||||
dockerContainerExecutor.activateContainer(cId, pidFile);
|
||||
int ret = dockerContainerExecutor.launchContainer(container, scriptPath, tokensPath,
|
||||
appSubmitter, appId, workDir, dirsHandler.getLocalDirs(),
|
||||
dirsHandler.getLogDirs());
|
||||
assertEquals(0, ret);
|
||||
//get the script
|
||||
Path sessionScriptPath = new Path(workDir,
|
||||
Shell.appendScriptExtension(
|
||||
DockerContainerExecutor.DOCKER_CONTAINER_EXECUTOR_SESSION_SCRIPT));
|
||||
LineNumberReader lnr = new LineNumberReader(new FileReader(sessionScriptPath.toString()));
|
||||
boolean cmdFound = false;
|
||||
List<String> localDirs = dirsToMount(dirsHandler.getLocalDirs());
|
||||
List<String> logDirs = dirsToMount(dirsHandler.getLogDirs());
|
||||
List<String> workDirMount = dirsToMount(Collections.singletonList(workDir.toUri().getPath()));
|
||||
List<String> expectedCommands = new ArrayList<String>(
|
||||
Arrays.asList(DOCKER_LAUNCH_COMMAND, "run", "--rm", "--net=host", "--name", containerId));
|
||||
expectedCommands.addAll(localDirs);
|
||||
expectedCommands.addAll(logDirs);
|
||||
expectedCommands.addAll(workDirMount);
|
||||
String shellScript = workDir + "/launch_container.sh";
|
||||
|
||||
expectedCommands.addAll(Arrays.asList(testImage.replaceAll("['\"]", ""), "bash","\"" + shellScript + "\""));
|
||||
|
||||
String expectedPidString = "echo `/bin/true inspect --format {{.State.Pid}} " + containerId+"` > "+ pidFile.toString() + ".tmp";
|
||||
boolean pidSetterFound = false;
|
||||
while(lnr.ready()){
|
||||
String line = lnr.readLine();
|
||||
LOG.debug("line: " + line);
|
||||
if (line.startsWith(DOCKER_LAUNCH_COMMAND)){
|
||||
List<String> command = new ArrayList<String>();
|
||||
for( String s :line.split("\\s+")){
|
||||
command.add(s.trim());
|
||||
}
|
||||
|
||||
assertEquals(expectedCommands, command);
|
||||
cmdFound = true;
|
||||
} else if (line.startsWith("echo")) {
|
||||
assertEquals(expectedPidString, line);
|
||||
pidSetterFound = true;
|
||||
}
|
||||
|
||||
}
|
||||
assertTrue(cmdFound);
|
||||
assertTrue(pidSetterFound);
|
||||
}
|
||||
|
||||
private List<String> dirsToMount(List<String> dirs) {
|
||||
List<String> localDirs = new ArrayList<String>();
|
||||
for(String dir: dirs){
|
||||
localDirs.add("-v");
|
||||
localDirs.add(dir + ":" + dir);
|
||||
}
|
||||
return localDirs;
|
||||
}
|
||||
}
|
||||
|
|
@ -75,6 +75,7 @@ import org.apache.hadoop.yarn.event.Event;
|
|||
import org.apache.hadoop.yarn.event.EventHandler;
|
||||
import org.apache.hadoop.yarn.security.ContainerTokenIdentifier;
|
||||
import org.apache.hadoop.yarn.server.api.protocolrecords.NMContainerStatus;
|
||||
import org.apache.hadoop.yarn.server.nodemanager.ContainerExecutor;
|
||||
import org.apache.hadoop.yarn.server.nodemanager.ContainerExecutor.ExitCode;
|
||||
import org.apache.hadoop.yarn.server.nodemanager.DefaultContainerExecutor;
|
||||
import org.apache.hadoop.yarn.server.nodemanager.containermanager.BaseContainerManagerTest;
|
||||
|
|
@ -144,7 +145,7 @@ public class TestContainerLaunch extends BaseContainerManagerTest {
|
|||
commands.add("/bin/sh ./\\\"" + badSymlink + "\\\"");
|
||||
}
|
||||
|
||||
ContainerLaunch.writeLaunchEnv(fos, env, resources, commands);
|
||||
new DefaultContainerExecutor().writeLaunchEnv(fos, env, resources, commands);
|
||||
fos.flush();
|
||||
fos.close();
|
||||
FileUtil.setExecutable(tempFile, true);
|
||||
|
|
@ -211,7 +212,7 @@ public class TestContainerLaunch extends BaseContainerManagerTest {
|
|||
} else {
|
||||
commands.add("/bin/sh ./\\\"" + symLink + "\\\"");
|
||||
}
|
||||
ContainerLaunch.writeLaunchEnv(fos, env, resources, commands);
|
||||
new DefaultContainerExecutor().writeLaunchEnv(fos, env, resources, commands);
|
||||
fos.flush();
|
||||
fos.close();
|
||||
FileUtil.setExecutable(tempFile, true);
|
||||
|
|
@ -264,7 +265,7 @@ public class TestContainerLaunch extends BaseContainerManagerTest {
|
|||
"\"workflowName\":\"\n\ninsert table " +
|
||||
"\npartition (cd_education_status)\nselect cd_demo_sk, cd_gender, " );
|
||||
List<String> commands = new ArrayList<String>();
|
||||
ContainerLaunch.writeLaunchEnv(fos, env, resources, commands);
|
||||
new DefaultContainerExecutor().writeLaunchEnv(fos, env, resources, commands);
|
||||
fos.flush();
|
||||
fos.close();
|
||||
|
||||
|
|
@ -341,7 +342,8 @@ public class TestContainerLaunch extends BaseContainerManagerTest {
|
|||
Map<String, String> env = new HashMap<String, String>();
|
||||
List<String> commands = new ArrayList<String>();
|
||||
commands.add(command);
|
||||
ContainerLaunch.writeLaunchEnv(fos, env, resources, commands);
|
||||
ContainerExecutor exec = new DefaultContainerExecutor();
|
||||
exec.writeLaunchEnv(fos, env, resources, commands);
|
||||
fos.flush();
|
||||
fos.close();
|
||||
|
||||
|
|
|
|||
|
|
@ -0,0 +1,200 @@
|
|||
|
||||
~~ Licensed 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. See accompanying LICENSE file.
|
||||
|
||||
---
|
||||
Hadoop Map Reduce Next Generation-${project.version} - Docker Container Executor
|
||||
---
|
||||
---
|
||||
${maven.build.timestamp}
|
||||
|
||||
Docker Container Executor
|
||||
|
||||
%{toc|section=1|fromDepth=0}
|
||||
|
||||
* {Overview}
|
||||
|
||||
Docker (https://www.docker.io/) combines an easy-to-use interface to
|
||||
Linux containers with easy-to-construct image files for those
|
||||
containers. In short, Docker launches very light weight virtual
|
||||
machines.
|
||||
|
||||
The Docker Container Executor (DCE) allows the YARN NodeManager to
|
||||
launch YARN containers into Docker containers. Users can specify the
|
||||
Docker images they want for their YARN containers. These containers
|
||||
provide a custom software environment in which the user's code runs,
|
||||
isolated from the software environment of the NodeManager. These
|
||||
containers can include special libraries needed by the application,
|
||||
and they can have different versions of Perl, Python, and even Java
|
||||
than what is installed on the NodeManager. Indeed, these containers
|
||||
can run a different flavor of Linux than what is running on the
|
||||
NodeManager -- although the YARN container must define all the environments
|
||||
and libraries needed to run the job, nothing will be shared with the NodeManager.
|
||||
|
||||
Docker for YARN provides both consistency (all YARN containers will
|
||||
have the same software environment) and isolation (no interference
|
||||
with whatever is installed on the physical machine).
|
||||
|
||||
* {Cluster Configuration}
|
||||
|
||||
Docker Container Executor runs in non-secure mode of HDFS and
|
||||
YARN. It will not run in secure mode, and will exit if it detects
|
||||
secure mode.
|
||||
|
||||
The DockerContainerExecutor requires Docker daemon to be running on
|
||||
the NodeManagers, and the Docker client installed and able to start Docker
|
||||
containers. To prevent timeouts while starting jobs, the Docker
|
||||
images to be used by a job should already be downloaded in the
|
||||
NodeManagers. Here's an example of how this can be done:
|
||||
|
||||
----
|
||||
sudo docker pull sequenceiq/hadoop-docker:2.4.1
|
||||
----
|
||||
|
||||
This should be done as part of the NodeManager startup.
|
||||
|
||||
The following properties must be set in yarn-site.xml:
|
||||
|
||||
----
|
||||
<property>
|
||||
<name>yarn.nodemanager.docker-container-executor.exec-name</name>
|
||||
<value>/usr/bin/docker</value>
|
||||
<description>
|
||||
Name or path to the Docker client. This is a required parameter. If this is empty,
|
||||
user must pass an image name as part of the job invocation(see below).
|
||||
</description>
|
||||
</property>
|
||||
|
||||
<property>
|
||||
<name>yarn.nodemanager.container-executor.class</name>
|
||||
<value>org.apache.hadoop.yarn.server.nodemanager.DockerContainerExecutor</value>
|
||||
<description>
|
||||
This is the container executor setting that ensures that all
|
||||
jobs are started with the DockerContainerExecutor.
|
||||
</description>
|
||||
</property>
|
||||
----
|
||||
|
||||
Administrators should be aware that DCE doesn't currently provide
|
||||
user name-space isolation. This means, in particular, that software
|
||||
running as root in the YARN container will have root privileges in the
|
||||
underlying NodeManager. Put differently, DCE currently provides no
|
||||
better security guarantees than YARN's Default Container Executor. In
|
||||
fact, DockerContainerExecutor will exit if it detects secure yarn.
|
||||
|
||||
* {Tips for connecting to a secure docker repository}
|
||||
|
||||
By default, docker images are pulled from the docker public repository. The
|
||||
format of a docker image url is: <username>/<image_name>. For example,
|
||||
sequenceiq/hadoop-docker:2.4.1 is an image in docker public repository that contains java and
|
||||
hadoop.
|
||||
|
||||
If you want your own private repository, you provide the repository url instead of
|
||||
your username. Therefore, the image url becomes: <private_repo_url>/<image_name>.
|
||||
For example, if your repository is on localhost:8080, your images would be like:
|
||||
localhost:8080/hadoop-docker
|
||||
|
||||
To connect to a secure docker repository, you can use the following invocation:
|
||||
|
||||
----
|
||||
docker login [OPTIONS] [SERVER]
|
||||
|
||||
Register or log in to a Docker registry server, if no server is specified
|
||||
"https://index.docker.io/v1/" is the default.
|
||||
|
||||
-e, --email="" Email
|
||||
-p, --password="" Password
|
||||
-u, --username="" Username
|
||||
----
|
||||
|
||||
If you want to login to a self-hosted registry you can specify this by adding
|
||||
the server name.
|
||||
|
||||
----
|
||||
docker login <private_repo_url>
|
||||
----
|
||||
|
||||
This needs to be run as part of the NodeManager startup, or as a cron job if
|
||||
the login session expires periodically. You can login to multiple docker repositories
|
||||
from the same NodeManager, but all your users will have access to all your repositories,
|
||||
as at present the DockerContainerExecutor does not support per-job docker login.
|
||||
|
||||
* {Job Configuration}
|
||||
|
||||
Currently you cannot configure any of the Docker settings with the job configuration.
|
||||
You can provide Mapper, Reducer, and ApplicationMaster environment overrides for the
|
||||
docker images, using the following 3 JVM properties respectively(only for MR jobs):
|
||||
* mapreduce.map.env: You can override the mapper's image by passing
|
||||
yarn.nodemanager.docker-container-executor.image-name=<your_image_name>
|
||||
to this JVM property.
|
||||
* mapreduce.reduce.env: You can override the reducer's image by passing
|
||||
yarn.nodemanager.docker-container-executor.image-name=<your_image_name>
|
||||
to this JVM property.
|
||||
* yarn.app.mapreduce.am.env: You can override the ApplicationMaster's image
|
||||
by passing yarn.nodemanager.docker-container-executor.image-name=<your_image_name>
|
||||
to this JVM property.
|
||||
|
||||
* {Docker Image requirements}
|
||||
|
||||
The Docker Images used for YARN containers must meet the following
|
||||
requirements:
|
||||
|
||||
The distro and version of Linux in your Docker Image can be quite different
|
||||
from that of your NodeManager. (Docker does have a few limitations in this
|
||||
regard, but you're not likely to hit them.) However, if you're using the
|
||||
MapReduce framework, then your image will need to be configured for running
|
||||
Hadoop. Java must be installed in the container, and the following environment variables
|
||||
must be defined in the image: JAVA_HOME, HADOOP_COMMON_PATH, HADOOP_HDFS_HOME,
|
||||
HADOOP_MAPRED_HOME, HADOOP_YARN_HOME, and HADOOP_CONF_DIR
|
||||
|
||||
|
||||
* {Working example of yarn launched docker containers.}
|
||||
|
||||
The following example shows how to run teragen using DockerContainerExecutor.
|
||||
|
||||
* First ensure that YARN is properly configured with DockerContainerExecutor(see above).
|
||||
|
||||
----
|
||||
<property>
|
||||
<name>yarn.nodemanager.docker-container-executor.exec-name</name>
|
||||
<value>docker -H=tcp://0.0.0.0:4243</value>
|
||||
<description>
|
||||
Name or path to the Docker client. The tcp socket must be
|
||||
where docker daemon is listening.
|
||||
</description>
|
||||
</property>
|
||||
|
||||
<property>
|
||||
<name>yarn.nodemanager.container-executor.class</name>
|
||||
<value>org.apache.hadoop.yarn.server.nodemanager.DockerContainerExecutor</value>
|
||||
<description>
|
||||
This is the container executor setting that ensures that all
|
||||
jobs are started with the DockerContainerExecutor.
|
||||
</description>
|
||||
</property>
|
||||
----
|
||||
|
||||
* Pick a custom Docker image if you want. In this example, we'll use sequenceiq/hadoop-docker:2.4.1 from the
|
||||
docker hub repository. It has jdk, hadoop, and all the previously mentioned environment variables configured.
|
||||
* Run:
|
||||
|
||||
----
|
||||
hadoop jar $HADOOP_INSTALLATION_DIR/share/hadoop/mapreduce/hadoop-mapreduce-examples-*.jar \
|
||||
teragen \
|
||||
-Dmapreduce.map.env="yarn.nodemanager.docker-container-executor.image-name=sequenceiq/hadoop-docker:2.4.1" \
|
||||
-Dyarn.app.mapreduce.am.env="yarn.nodemanager.docker-container-executor.image-name=sequenceiq/hadoop-docker:2.4.1" \
|
||||
1000 \
|
||||
teragen_out_dir
|
||||
----
|
||||
|
||||
Once it succeeds, you can check the yarn debug logs to verify that docker indeed has launched containers.
|
||||
|
||||
Loading…
Reference in New Issue