| /** |
| * 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.applications.distributedshell; |
| |
| import java.io.BufferedReader; |
| import java.io.IOException; |
| import java.io.InputStreamReader; |
| import java.net.InetSocketAddress; |
| import java.net.URI; |
| import java.net.URISyntaxException; |
| import java.util.ArrayList; |
| import java.util.HashMap; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Vector; |
| import java.util.concurrent.CopyOnWriteArrayList; |
| import java.util.concurrent.atomic.AtomicInteger; |
| |
| import org.apache.commons.cli.CommandLine; |
| import org.apache.commons.cli.GnuParser; |
| import org.apache.commons.cli.HelpFormatter; |
| import org.apache.commons.cli.Options; |
| import org.apache.commons.cli.ParseException; |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| |
| import org.apache.hadoop.classification.InterfaceAudience; |
| import org.apache.hadoop.classification.InterfaceStability; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.net.NetUtils; |
| import org.apache.hadoop.yarn.api.AMRMProtocol; |
| import org.apache.hadoop.yarn.api.ApplicationConstants; |
| import org.apache.hadoop.yarn.api.ContainerManager; |
| |
| import org.apache.hadoop.yarn.api.protocolrecords.AllocateRequest; |
| import org.apache.hadoop.yarn.api.protocolrecords.AllocateResponse; |
| import org.apache.hadoop.yarn.api.protocolrecords.FinishApplicationMasterRequest; |
| //import org.apache.hadoop.yarn.api.protocolrecords.GetContainerStatusRequest; |
| //import org.apache.hadoop.yarn.api.protocolrecords.GetContainerStatusResponse; |
| import org.apache.hadoop.yarn.api.protocolrecords.RegisterApplicationMasterRequest; |
| import org.apache.hadoop.yarn.api.protocolrecords.RegisterApplicationMasterResponse; |
| import org.apache.hadoop.yarn.api.protocolrecords.StartContainerRequest; |
| |
| import org.apache.hadoop.yarn.api.records.AMResponse; |
| import org.apache.hadoop.yarn.api.records.ApplicationAttemptId; |
| import org.apache.hadoop.yarn.api.records.Container; |
| import org.apache.hadoop.yarn.api.records.ContainerId; |
| import org.apache.hadoop.yarn.api.records.ContainerLaunchContext; |
| import org.apache.hadoop.yarn.api.records.ContainerState; |
| import org.apache.hadoop.yarn.api.records.ContainerStatus; |
| import org.apache.hadoop.yarn.api.records.FinalApplicationStatus; |
| import org.apache.hadoop.yarn.api.records.LocalResource; |
| import org.apache.hadoop.yarn.api.records.LocalResourceType; |
| import org.apache.hadoop.yarn.api.records.LocalResourceVisibility; |
| import org.apache.hadoop.yarn.api.records.Priority; |
| import org.apache.hadoop.yarn.api.records.Resource; |
| import org.apache.hadoop.yarn.api.records.ResourceRequest; |
| import org.apache.hadoop.yarn.conf.YarnConfiguration; |
| import org.apache.hadoop.yarn.exceptions.YarnRemoteException; |
| import org.apache.hadoop.yarn.ipc.YarnRPC; |
| import org.apache.hadoop.yarn.util.ConverterUtils; |
| import org.apache.hadoop.yarn.util.Records; |
| |
| /** |
| * An ApplicationMaster for executing shell commands on a set of launched containers using the YARN framework. |
| * |
| * <p>This class is meant to act as an example on how to write yarn-based application masters. </p> |
| * |
| * <p> The ApplicationMaster is started on a container by the <code>ResourceManager</code>'s launcher. |
| * The first thing that the <code>ApplicationMaster</code> needs to do is to connect and register itself with |
| * the <code>ResourceManager</code>. The registration sets up information within the <code>ResourceManager</code> |
| * regarding what host:port the ApplicationMaster is listening on to provide any form of functionality to a client |
| * as well as a tracking url that a client can use to keep track of status/job history if needed. </p> |
| * |
| * <p> The <code>ApplicationMaster</code> needs to send a heartbeat to the <code>ResourceManager</code> at regular intervals |
| * to inform the <code>ResourceManager</code> that it is up and alive. The {@link AMRMProtocol#allocate} to the |
| * <code>ResourceManager</code> from the <code>ApplicationMaster</code> acts as a heartbeat. |
| * |
| * <p> For the actual handling of the job, the <code>ApplicationMaster</code> has to request the |
| * <code>ResourceManager</code> via {@link AllocateRequest} for the required no. of containers using {@link ResourceRequest} |
| * with the necessary resource specifications such as node location, computational (memory/disk/cpu) resource requirements. |
| * The <code>ResourceManager</code> responds with an {@link AllocateResponse} that informs the <code>ApplicationMaster</code> |
| * of the set of newly allocated containers, completed containers as well as current state of available resources. </p> |
| * |
| * <p> For each allocated container, the <code>ApplicationMaster</code> can then set up the necessary launch context via |
| * {@link ContainerLaunchContext} to specify the allocated container id, local resources required by the executable, |
| * the environment to be setup for the executable, commands to execute, etc. and submit a {@link StartContainerRequest} |
| * to the {@link ContainerManager} to launch and execute the defined commands on the given allocated container. </p> |
| * |
| * <p> The <code>ApplicationMaster</code> can monitor the launched container by either querying the <code>ResourceManager</code> |
| * using {@link AMRMProtocol#allocate} to get updates on completed containers or via the {@link ContainerManager} |
| * by querying for the status of the allocated container's {@link ContainerId}. |
| * |
| * <p> After the job has been completed, the <code>ApplicationMaster</code> has to send a {@link FinishApplicationMasterRequest} |
| * to the <code>ResourceManager</code> to inform it that the <code>ApplicationMaster</code> has been completed. |
| */ |
| @InterfaceAudience.Public |
| @InterfaceStability.Unstable |
| public class ApplicationMaster { |
| |
| private static final Log LOG = LogFactory.getLog(ApplicationMaster.class); |
| |
| // Configuration |
| private Configuration conf; |
| // YARN RPC to communicate with the Resource Manager or Node Manager |
| private YarnRPC rpc; |
| |
| // Handle to communicate with the Resource Manager |
| private AMRMProtocol resourceManager; |
| |
| // Application Attempt Id ( combination of attemptId and fail count ) |
| private ApplicationAttemptId appAttemptID; |
| |
| // TODO |
| // For status update for clients - yet to be implemented |
| // Hostname of the container |
| private String appMasterHostname = ""; |
| // Port on which the app master listens for status update requests from clients |
| private int appMasterRpcPort = 0; |
| // Tracking url to which app master publishes info for clients to monitor |
| private String appMasterTrackingUrl = ""; |
| |
| // App Master configuration |
| // No. of containers to run shell command on |
| private int numTotalContainers = 1; |
| // Memory to request for the container on which the shell command will run |
| private int containerMemory = 10; |
| // Priority of the request |
| private int requestPriority; |
| |
| // Incremental counter for rpc calls to the RM |
| private AtomicInteger rmRequestID = new AtomicInteger(); |
| |
| // Simple flag to denote whether all works is done |
| private boolean appDone = false; |
| // Counter for completed containers ( complete denotes successful or failed ) |
| private AtomicInteger numCompletedContainers = new AtomicInteger(); |
| // Allocated container count so that we know how many containers has the RM |
| // allocated to us |
| private AtomicInteger numAllocatedContainers = new AtomicInteger(); |
| // Count of failed containers |
| private AtomicInteger numFailedContainers = new AtomicInteger(); |
| // Count of containers already requested from the RM |
| // Needed as once requested, we should not request for containers again and again. |
| // Only request for more if the original requirement changes. |
| private AtomicInteger numRequestedContainers = new AtomicInteger(); |
| |
| // Shell command to be executed |
| private String shellCommand = ""; |
| // Args to be passed to the shell command |
| private String shellArgs = ""; |
| // Env variables to be setup for the shell command |
| private Map<String, String> shellEnv = new HashMap<String, String>(); |
| |
| // Location of shell script ( obtained from info set in env ) |
| // Shell script path in fs |
| private String shellScriptPath = ""; |
| // Timestamp needed for creating a local resource |
| private long shellScriptPathTimestamp = 0; |
| // File length needed for local resource |
| private long shellScriptPathLen = 0; |
| |
| // Hardcoded path to shell script in launch container's local env |
| private final String ExecShellStringPath = "ExecShellScript.sh"; |
| |
| // Containers to be released |
| private CopyOnWriteArrayList<ContainerId> releasedContainers = new CopyOnWriteArrayList<ContainerId>(); |
| |
| // Launch threads |
| private List<Thread> launchThreads = new ArrayList<Thread>(); |
| |
| /** |
| * @param args Command line args |
| */ |
| public static void main(String[] args) { |
| boolean result = false; |
| try { |
| ApplicationMaster appMaster = new ApplicationMaster(); |
| LOG.info("Initializing ApplicationMaster"); |
| boolean doRun = appMaster.init(args); |
| if (!doRun) { |
| System.exit(0); |
| } |
| result = appMaster.run(); |
| } catch (Throwable t) { |
| LOG.fatal("Error running ApplicationMaster", t); |
| System.exit(1); |
| } |
| if (result) { |
| LOG.info("Application Master completed successfully. exiting"); |
| System.exit(0); |
| } |
| else { |
| LOG.info("Application Master failed. exiting"); |
| System.exit(2); |
| } |
| } |
| |
| /** |
| * Dump out contents of $CWD and the environment to stdout for debugging |
| */ |
| private void dumpOutDebugInfo() { |
| |
| LOG.info("Dump debug output"); |
| Map<String, String> envs = System.getenv(); |
| for (Map.Entry<String, String> env : envs.entrySet()) { |
| LOG.info("System env: key=" + env.getKey() + ", val=" + env.getValue()); |
| System.out.println("System env: key=" + env.getKey() + ", val=" + env.getValue()); |
| } |
| |
| String cmd = "ls -al"; |
| Runtime run = Runtime.getRuntime(); |
| Process pr = null; |
| try { |
| pr = run.exec(cmd); |
| pr.waitFor(); |
| |
| BufferedReader buf = new BufferedReader(new InputStreamReader(pr.getInputStream())); |
| String line = ""; |
| while ((line=buf.readLine())!=null) { |
| LOG.info("System CWD content: " + line); |
| System.out.println("System CWD content: " + line); |
| } |
| buf.close(); |
| } catch (IOException e) { |
| e.printStackTrace(); |
| } catch (InterruptedException e) { |
| e.printStackTrace(); |
| } |
| } |
| |
| public ApplicationMaster() throws Exception { |
| // Set up the configuration and RPC |
| conf = new Configuration(); |
| rpc = YarnRPC.create(conf); |
| } |
| /** |
| * Parse command line options |
| * @param args Command line args |
| * @return Whether init successful and run should be invoked |
| * @throws ParseException |
| * @throws IOException |
| */ |
| public boolean init(String[] args) throws ParseException, IOException { |
| |
| Options opts = new Options(); |
| opts.addOption("app_attempt_id", true, "App Attempt ID. Not to be used unless for testing purposes"); |
| opts.addOption("shell_command", true, "Shell command to be executed by the Application Master"); |
| opts.addOption("shell_script", true, "Location of the shell script to be executed"); |
| opts.addOption("shell_args", true, "Command line args for the shell script"); |
| opts.addOption("shell_env", true, "Environment for shell script. Specified as env_key=env_val pairs"); |
| opts.addOption("container_memory", true, "Amount of memory in MB to be requested to run the shell command"); |
| opts.addOption("num_containers", true, "No. of containers on which the shell command needs to be executed"); |
| opts.addOption("priority", true, "Application Priority. Default 0"); |
| opts.addOption("debug", false, "Dump out debug information"); |
| |
| opts.addOption("help", false, "Print usage"); |
| CommandLine cliParser = new GnuParser().parse(opts, args); |
| |
| if (args.length == 0) { |
| printUsage(opts); |
| throw new IllegalArgumentException("No args specified for application master to initialize"); |
| } |
| |
| if (cliParser.hasOption("help")) { |
| printUsage(opts); |
| return false; |
| } |
| |
| if (cliParser.hasOption("debug")) { |
| dumpOutDebugInfo(); |
| } |
| |
| Map<String, String> envs = System.getenv(); |
| |
| appAttemptID = Records.newRecord(ApplicationAttemptId.class); |
| if (!envs.containsKey(ApplicationConstants.AM_CONTAINER_ID_ENV)) { |
| if (cliParser.hasOption("app_attempt_id")) { |
| String appIdStr = cliParser.getOptionValue("app_attempt_id", ""); |
| appAttemptID = ConverterUtils.toApplicationAttemptId(appIdStr); |
| } |
| else { |
| throw new IllegalArgumentException("Application Attempt Id not set in the environment"); |
| } |
| } else { |
| ContainerId containerId = ConverterUtils.toContainerId(envs.get(ApplicationConstants.AM_CONTAINER_ID_ENV)); |
| appAttemptID = containerId.getApplicationAttemptId(); |
| } |
| |
| LOG.info("Application master for app" |
| + ", appId=" + appAttemptID.getApplicationId().getId() |
| + ", clustertimestamp=" + appAttemptID.getApplicationId().getClusterTimestamp() |
| + ", attemptId=" + appAttemptID.getAttemptId()); |
| |
| if (!cliParser.hasOption("shell_command")) { |
| throw new IllegalArgumentException("No shell command specified to be executed by application master"); |
| } |
| shellCommand = cliParser.getOptionValue("shell_command"); |
| |
| if (cliParser.hasOption("shell_args")) { |
| shellArgs = cliParser.getOptionValue("shell_args"); |
| } |
| if (cliParser.hasOption("shell_env")) { |
| String shellEnvs[] = cliParser.getOptionValues("shell_env"); |
| for (String env : shellEnvs) { |
| env = env.trim(); |
| int index = env.indexOf('='); |
| if (index == -1) { |
| shellEnv.put(env, ""); |
| continue; |
| } |
| String key = env.substring(0, index); |
| String val = ""; |
| if (index < (env.length()-1)) { |
| val = env.substring(index+1); |
| } |
| shellEnv.put(key, val); |
| } |
| } |
| |
| if (envs.containsKey(DSConstants.DISTRIBUTEDSHELLSCRIPTLOCATION)) { |
| shellScriptPath = envs.get(DSConstants.DISTRIBUTEDSHELLSCRIPTLOCATION); |
| |
| if (envs.containsKey(DSConstants.DISTRIBUTEDSHELLSCRIPTTIMESTAMP)) { |
| shellScriptPathTimestamp = Long.valueOf(envs.get(DSConstants.DISTRIBUTEDSHELLSCRIPTTIMESTAMP)); |
| } |
| if (envs.containsKey(DSConstants.DISTRIBUTEDSHELLSCRIPTLEN)) { |
| shellScriptPathLen = Long.valueOf(envs.get(DSConstants.DISTRIBUTEDSHELLSCRIPTLEN)); |
| } |
| |
| if (!shellScriptPath.isEmpty() |
| && (shellScriptPathTimestamp <= 0 |
| || shellScriptPathLen <= 0)) { |
| LOG.error("Illegal values in env for shell script path" |
| + ", path=" + shellScriptPath |
| + ", len=" + shellScriptPathLen |
| + ", timestamp=" + shellScriptPathTimestamp); |
| throw new IllegalArgumentException("Illegal values in env for shell script path"); |
| } |
| } |
| |
| containerMemory = Integer.parseInt(cliParser.getOptionValue("container_memory", "10")); |
| numTotalContainers = Integer.parseInt(cliParser.getOptionValue("num_containers", "1")); |
| requestPriority = Integer.parseInt(cliParser.getOptionValue("priority", "0")); |
| |
| return true; |
| } |
| |
| /** |
| * Helper function to print usage |
| * @param opts Parsed command line options |
| */ |
| private void printUsage(Options opts) { |
| new HelpFormatter().printHelp("ApplicationMaster", opts); |
| } |
| |
| /** |
| * Main run function for the application master |
| * @throws YarnRemoteException |
| */ |
| public boolean run() throws YarnRemoteException { |
| LOG.info("Starting ApplicationMaster"); |
| |
| // Connect to ResourceManager |
| resourceManager = connectToRM(); |
| |
| // Setup local RPC Server to accept status requests directly from clients |
| // TODO need to setup a protocol for client to be able to communicate to the RPC server |
| // TODO use the rpc port info to register with the RM for the client to send requests to this app master |
| |
| // Register self with ResourceManager |
| RegisterApplicationMasterResponse response = registerToRM(); |
| // Dump out information about cluster capability as seen by the resource manager |
| int minMem = response.getMinimumResourceCapability().getMemory(); |
| int maxMem = response.getMaximumResourceCapability().getMemory(); |
| LOG.info("Min mem capabililty of resources in this cluster " + minMem); |
| LOG.info("Max mem capabililty of resources in this cluster " + maxMem); |
| |
| // A resource ask has to be atleast the minimum of the capability of the cluster, the value has to be |
| // a multiple of the min value and cannot exceed the max. |
| // If it is not an exact multiple of min, the RM will allocate to the nearest multiple of min |
| if (containerMemory < minMem) { |
| LOG.info("Container memory specified below min threshold of cluster. Using min value." |
| + ", specified=" + containerMemory |
| + ", min=" + minMem); |
| containerMemory = minMem; |
| } |
| else if (containerMemory > maxMem) { |
| LOG.info("Container memory specified above max threshold of cluster. Using max value." |
| + ", specified=" + containerMemory |
| + ", max=" + maxMem); |
| containerMemory = maxMem; |
| } |
| |
| // Setup heartbeat emitter |
| // TODO poll RM every now and then with an empty request to let RM know that we are alive |
| // The heartbeat interval after which an AM is timed out by the RM is defined by a config setting: |
| // RM_AM_EXPIRY_INTERVAL_MS with default defined by DEFAULT_RM_AM_EXPIRY_INTERVAL_MS |
| // The allocate calls to the RM count as heartbeats so, for now, this additional heartbeat emitter |
| // is not required. |
| |
| // Setup ask for containers from RM |
| // Send request for containers to RM |
| // Until we get our fully allocated quota, we keep on polling RM for containers |
| // Keep looping until all the containers are launched and shell script executed on them |
| // ( regardless of success/failure). |
| |
| int loopCounter = -1; |
| |
| while (numCompletedContainers.get() < numTotalContainers |
| && !appDone) { |
| loopCounter++; |
| |
| // log current state |
| LOG.info("Current application state: loop=" + loopCounter |
| + ", appDone=" + appDone |
| + ", total=" + numTotalContainers |
| + ", requested=" + numRequestedContainers |
| + ", completed=" + numCompletedContainers |
| + ", failed=" + numFailedContainers |
| + ", currentAllocated=" + numAllocatedContainers); |
| |
| // Sleep before each loop when asking RM for containers |
| // to avoid flooding RM with spurious requests when it |
| // need not have any available containers |
| // Sleeping for 1000 ms. |
| try { |
| Thread.sleep(1000); |
| } catch (InterruptedException e) { |
| LOG.info("Sleep interrupted " + e.getMessage()); |
| } |
| |
| // No. of containers to request |
| // For the first loop, askCount will be equal to total containers needed |
| // From that point on, askCount will always be 0 as current implementation |
| // does not change its ask on container failures. |
| int askCount = numTotalContainers - numRequestedContainers.get(); |
| numRequestedContainers.addAndGet(askCount); |
| |
| // Setup request to be sent to RM to allocate containers |
| List<ResourceRequest> resourceReq = new ArrayList<ResourceRequest>(); |
| if (askCount > 0) { |
| ResourceRequest containerAsk = setupContainerAskForRM(askCount); |
| resourceReq.add(containerAsk); |
| } |
| |
| // Send the request to RM |
| LOG.info("Asking RM for containers" |
| + ", askCount=" + askCount); |
| AMResponse amResp =sendContainerAskToRM(resourceReq); |
| |
| // Retrieve list of allocated containers from the response |
| List<Container> allocatedContainers = amResp.getAllocatedContainers(); |
| LOG.info("Got response from RM for container ask, allocatedCnt=" + allocatedContainers.size()); |
| numAllocatedContainers.addAndGet(allocatedContainers.size()); |
| for (Container allocatedContainer : allocatedContainers) { |
| LOG.info("Launching shell command on a new container." |
| + ", containerId=" + allocatedContainer.getId() |
| + ", containerNode=" + allocatedContainer.getNodeId().getHost() |
| + ":" + allocatedContainer.getNodeId().getPort() |
| + ", containerNodeURI=" + allocatedContainer.getNodeHttpAddress() |
| + ", containerState" + allocatedContainer.getState() |
| + ", containerResourceMemory" + allocatedContainer.getResource().getMemory()); |
| //+ ", containerToken" + allocatedContainer.getContainerToken().getIdentifier().toString()); |
| |
| LaunchContainerRunnable runnableLaunchContainer = new LaunchContainerRunnable(allocatedContainer); |
| Thread launchThread = new Thread(runnableLaunchContainer); |
| |
| // launch and start the container on a separate thread to keep the main thread unblocked |
| // as all containers may not be allocated at one go. |
| launchThreads.add(launchThread); |
| launchThread.start(); |
| } |
| |
| // Check what the current available resources in the cluster are |
| // TODO should we do anything if the available resources are not enough? |
| Resource availableResources = amResp.getAvailableResources(); |
| LOG.info("Current available resources in the cluster " + availableResources); |
| |
| // Check the completed containers |
| List<ContainerStatus> completedContainers = amResp.getCompletedContainersStatuses(); |
| LOG.info("Got response from RM for container ask, completedCnt=" + completedContainers.size()); |
| for (ContainerStatus containerStatus : completedContainers) { |
| LOG.info("Got container status for containerID= " + containerStatus.getContainerId() |
| + ", state=" + containerStatus.getState() |
| + ", exitStatus=" + containerStatus.getExitStatus() |
| + ", diagnostics=" + containerStatus.getDiagnostics()); |
| |
| // non complete containers should not be here |
| assert(containerStatus.getState() == ContainerState.COMPLETE); |
| |
| // increment counters for completed/failed containers |
| int exitStatus = containerStatus.getExitStatus(); |
| if (0 != exitStatus) { |
| // container failed |
| if (-100 != exitStatus) { |
| // shell script failed |
| // counts as completed |
| numCompletedContainers.incrementAndGet(); |
| numFailedContainers.incrementAndGet(); |
| } |
| else { |
| // something else bad happened |
| // app job did not complete for some reason |
| // we should re-try as the container was lost for some reason |
| numAllocatedContainers.decrementAndGet(); |
| numRequestedContainers.decrementAndGet(); |
| // we do not need to release the container as it would be done |
| // by the RM/CM. |
| } |
| } |
| else { |
| // nothing to do |
| // container completed successfully |
| numCompletedContainers.incrementAndGet(); |
| LOG.info("Container completed successfully." |
| + ", containerId=" + containerStatus.getContainerId()); |
| } |
| |
| } |
| if (numCompletedContainers.get() == numTotalContainers) { |
| appDone = true; |
| } |
| |
| LOG.info("Current application state: loop=" + loopCounter |
| + ", appDone=" + appDone |
| + ", total=" + numTotalContainers |
| + ", requested=" + numRequestedContainers |
| + ", completed=" + numCompletedContainers |
| + ", failed=" + numFailedContainers |
| + ", currentAllocated=" + numAllocatedContainers); |
| |
| // TODO |
| // Add a timeout handling layer |
| // for misbehaving shell commands |
| } |
| |
| // Join all launched threads |
| // needed for when we time out |
| // and we need to release containers |
| for (Thread launchThread : launchThreads) { |
| try { |
| launchThread.join(10000); |
| } catch (InterruptedException e) { |
| LOG.info("Exception thrown in thread join: " + e.getMessage()); |
| e.printStackTrace(); |
| } |
| } |
| |
| // When the application completes, it should send a finish application signal |
| // to the RM |
| LOG.info("Application completed. Signalling finish to RM"); |
| |
| FinishApplicationMasterRequest finishReq = Records.newRecord(FinishApplicationMasterRequest.class); |
| finishReq.setAppAttemptId(appAttemptID); |
| boolean isSuccess = true; |
| if (numFailedContainers.get() == 0) { |
| finishReq.setFinishApplicationStatus(FinalApplicationStatus.SUCCEEDED); |
| } |
| else { |
| finishReq.setFinishApplicationStatus(FinalApplicationStatus.FAILED); |
| String diagnostics = "Diagnostics." |
| + ", total=" + numTotalContainers |
| + ", completed=" + numCompletedContainers.get() |
| + ", allocated=" + numAllocatedContainers.get() |
| + ", failed=" + numFailedContainers.get(); |
| finishReq.setDiagnostics(diagnostics); |
| isSuccess = false; |
| } |
| resourceManager.finishApplicationMaster(finishReq); |
| return isSuccess; |
| } |
| |
| /** |
| * Thread to connect to the {@link ContainerManager} and |
| * launch the container that will execute the shell command. |
| */ |
| private class LaunchContainerRunnable implements Runnable { |
| |
| // Allocated container |
| Container container; |
| // Handle to communicate with ContainerManager |
| ContainerManager cm; |
| |
| /** |
| * @param lcontainer Allocated container |
| */ |
| public LaunchContainerRunnable(Container lcontainer) { |
| this.container = lcontainer; |
| } |
| |
| /** |
| * Helper function to connect to CM |
| */ |
| private void connectToCM() { |
| LOG.debug("Connecting to ContainerManager for containerid=" + container.getId()); |
| String cmIpPortStr = container.getNodeId().getHost() + ":" |
| + container.getNodeId().getPort(); |
| InetSocketAddress cmAddress = NetUtils.createSocketAddr(cmIpPortStr); |
| LOG.info("Connecting to ContainerManager at " + cmIpPortStr); |
| this.cm = ((ContainerManager) rpc.getProxy(ContainerManager.class, cmAddress, conf)); |
| } |
| |
| |
| @Override |
| /** |
| * Connects to CM, sets up container launch context |
| * for shell command and eventually dispatches the container |
| * start request to the CM. |
| */ |
| public void run() { |
| // Connect to ContainerManager |
| connectToCM(); |
| |
| LOG.info("Setting up container launch container for containerid=" + container.getId()); |
| ContainerLaunchContext ctx = Records.newRecord(ContainerLaunchContext.class); |
| |
| ctx.setContainerId(container.getId()); |
| ctx.setResource(container.getResource()); |
| |
| String jobUserName = System.getenv(ApplicationConstants.Environment.USER |
| .name()); |
| ctx.setUser(jobUserName); |
| LOG.info("Setting user in ContainerLaunchContext to: " + jobUserName); |
| |
| // Set the environment |
| ctx.setEnvironment(shellEnv); |
| |
| // Set the local resources |
| Map<String, LocalResource> localResources = new HashMap<String, LocalResource>(); |
| |
| // The container for the eventual shell commands needs its own local resources too. |
| // In this scenario, if a shell script is specified, we need to have it copied |
| // and made available to the container. |
| if (!shellScriptPath.isEmpty()) { |
| LocalResource shellRsrc = Records.newRecord(LocalResource.class); |
| shellRsrc.setType(LocalResourceType.FILE); |
| shellRsrc.setVisibility(LocalResourceVisibility.APPLICATION); |
| try { |
| shellRsrc.setResource(ConverterUtils.getYarnUrlFromURI(new URI(shellScriptPath))); |
| } catch (URISyntaxException e) { |
| LOG.error("Error when trying to use shell script path specified in env" |
| + ", path=" + shellScriptPath); |
| e.printStackTrace(); |
| |
| // A failure scenario on bad input such as invalid shell script path |
| // We know we cannot continue launching the container |
| // so we should release it. |
| // TODO |
| numCompletedContainers.incrementAndGet(); |
| numFailedContainers.incrementAndGet(); |
| return; |
| } |
| shellRsrc.setTimestamp(shellScriptPathTimestamp); |
| shellRsrc.setSize(shellScriptPathLen); |
| localResources.put(ExecShellStringPath, shellRsrc); |
| } |
| ctx.setLocalResources(localResources); |
| |
| // Set the necessary command to execute on the allocated container |
| Vector<CharSequence> vargs = new Vector<CharSequence>(5); |
| |
| // Set executable command |
| vargs.add(shellCommand); |
| // Set shell script path |
| if (!shellScriptPath.isEmpty()) { |
| vargs.add(ExecShellStringPath); |
| } |
| |
| // Set args for the shell command if any |
| vargs.add(shellArgs); |
| // Add log redirect params |
| // TODO |
| // We should redirect the output to hdfs instead of local logs |
| // so as to be able to look at the final output after the containers |
| // have been released. |
| // Could use a path suffixed with /AppId/AppAttempId/ContainerId/std[out|err] |
| vargs.add("1>" + ApplicationConstants.LOG_DIR_EXPANSION_VAR + "/stdout"); |
| vargs.add("2>" + ApplicationConstants.LOG_DIR_EXPANSION_VAR + "/stderr"); |
| |
| // Get final commmand |
| StringBuilder command = new StringBuilder(); |
| for (CharSequence str : vargs) { |
| command.append(str).append(" "); |
| } |
| |
| List<String> commands = new ArrayList<String>(); |
| commands.add(command.toString()); |
| ctx.setCommands(commands); |
| |
| StartContainerRequest startReq = Records.newRecord(StartContainerRequest.class); |
| startReq.setContainerLaunchContext(ctx); |
| try { |
| cm.startContainer(startReq); |
| } catch (YarnRemoteException e) { |
| LOG.info("Start container failed for :" |
| + ", containerId=" + container.getId()); |
| e.printStackTrace(); |
| // TODO do we need to release this container? |
| } |
| |
| // Get container status? |
| // Left commented out as the shell scripts are short lived |
| // and we are relying on the status for completed containers from RM to detect status |
| |
| // GetContainerStatusRequest statusReq = Records.newRecord(GetContainerStatusRequest.class); |
| // statusReq.setContainerId(container.getId()); |
| // GetContainerStatusResponse statusResp; |
| //try { |
| //statusResp = cm.getContainerStatus(statusReq); |
| // LOG.info("Container Status" |
| // + ", id=" + container.getId() |
| // + ", status=" +statusResp.getStatus()); |
| //} catch (YarnRemoteException e) { |
| //e.printStackTrace(); |
| //} |
| } |
| } |
| |
| /** |
| * Connect to the Resource Manager |
| * @return Handle to communicate with the RM |
| */ |
| private AMRMProtocol connectToRM() { |
| YarnConfiguration yarnConf = new YarnConfiguration(conf); |
| InetSocketAddress rmAddress = yarnConf.getSocketAddr( |
| YarnConfiguration.RM_SCHEDULER_ADDRESS, |
| YarnConfiguration.DEFAULT_RM_SCHEDULER_ADDRESS, |
| YarnConfiguration.DEFAULT_RM_SCHEDULER_PORT); |
| LOG.info("Connecting to ResourceManager at " + rmAddress); |
| return ((AMRMProtocol) rpc.getProxy(AMRMProtocol.class, rmAddress, conf)); |
| } |
| |
| /** |
| * Register the Application Master to the Resource Manager |
| * @return the registration response from the RM |
| * @throws YarnRemoteException |
| */ |
| private RegisterApplicationMasterResponse registerToRM() throws YarnRemoteException { |
| RegisterApplicationMasterRequest appMasterRequest = Records.newRecord(RegisterApplicationMasterRequest.class); |
| |
| // set the required info into the registration request: |
| // application attempt id, |
| // host on which the app master is running |
| // rpc port on which the app master accepts requests from the client |
| // tracking url for the app master |
| appMasterRequest.setApplicationAttemptId(appAttemptID); |
| appMasterRequest.setHost(appMasterHostname); |
| appMasterRequest.setRpcPort(appMasterRpcPort); |
| appMasterRequest.setTrackingUrl(appMasterTrackingUrl); |
| |
| return resourceManager.registerApplicationMaster(appMasterRequest); |
| } |
| |
| /** |
| * Setup the request that will be sent to the RM for the container ask. |
| * @param numContainers Containers to ask for from RM |
| * @return the setup ResourceRequest to be sent to RM |
| */ |
| private ResourceRequest setupContainerAskForRM(int numContainers) { |
| ResourceRequest request = Records.newRecord(ResourceRequest.class); |
| |
| // setup requirements for hosts |
| // whether a particular rack/host is needed |
| // Refer to apis under org.apache.hadoop.net for more |
| // details on how to get figure out rack/host mapping. |
| // using * as any host will do for the distributed shell app |
| request.setHostName("*"); |
| |
| // set no. of containers needed |
| request.setNumContainers(numContainers); |
| |
| // set the priority for the request |
| Priority pri = Records.newRecord(Priority.class); |
| // TODO - what is the range for priority? how to decide? |
| pri.setPriority(requestPriority); |
| request.setPriority(pri); |
| |
| // Set up resource type requirements |
| // For now, only memory is supported so we set memory requirements |
| Resource capability = Records.newRecord(Resource.class); |
| capability.setMemory(containerMemory); |
| request.setCapability(capability); |
| |
| return request; |
| } |
| |
| /** |
| * Ask RM to allocate given no. of containers to this Application Master |
| * @param requestedContainers Containers to ask for from RM |
| * @return Response from RM to AM with allocated containers |
| * @throws YarnRemoteException |
| */ |
| private AMResponse sendContainerAskToRM(List<ResourceRequest> requestedContainers) |
| throws YarnRemoteException { |
| AllocateRequest req = Records.newRecord(AllocateRequest.class); |
| req.setResponseId(rmRequestID.incrementAndGet()); |
| req.setApplicationAttemptId(appAttemptID); |
| req.addAllAsks(requestedContainers); |
| req.addAllReleases(releasedContainers); |
| req.setProgress((float)numCompletedContainers.get()/numTotalContainers); |
| |
| LOG.info("Sending request to RM for containers" |
| + ", requestedSet=" + requestedContainers.size() |
| + ", releasedSet=" + releasedContainers.size() |
| + ", progress=" + req.getProgress()); |
| |
| for (ResourceRequest rsrcReq : requestedContainers) { |
| LOG.info("Requested container ask: " + rsrcReq.toString()); |
| } |
| for (ContainerId id : releasedContainers) { |
| LOG.info("Released container, id=" + id.getId()); |
| } |
| |
| AllocateResponse resp = resourceManager.allocate(req); |
| return resp.getAMResponse(); |
| } |
| } |
