azkaban.jobtype.HadoopSecureSparkWrapper.java Source code

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Here is the source code for azkaban.jobtype.HadoopSecureSparkWrapper.java

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/*
 * Copyright 2015 LinkedIn Corp.
 *
 * 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.
 */

package azkaban.jobtype;

import java.security.PrivilegedExceptionAction;
import java.util.Arrays;
import java.util.Properties;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.security.UserGroupInformation;
import org.apache.log4j.Logger;

import azkaban.security.commons.HadoopSecurityManager;
import azkaban.utils.Props;
import static azkaban.flow.CommonJobProperties.ATTEMPT_LINK;
import static azkaban.flow.CommonJobProperties.EXECUTION_LINK;
import static azkaban.flow.CommonJobProperties.JOB_LINK;
import static azkaban.flow.CommonJobProperties.WORKFLOW_LINK;
import static org.apache.hadoop.security.UserGroupInformation.HADOOP_TOKEN_FILE_LOCATION;

/**
 * <pre>
 * A Spark wrapper (more specifically a spark-submit wrapper) that works with Azkaban.
 * This class will receive input from {@link azkaban.jobtype.HadoopSparkJob}, and pass it on to spark-submit
 * </pre>
 *
 * @see azkaban.jobtype.HadoopSecureSparkWrapper
 */
public class HadoopSecureSparkWrapper {

    private static final Logger logger = Logger.getRootLogger();

    /**
     * Entry point: a Java wrapper to the spark-submit command
     * 
     * @param args
     * @throws Exception
     */
    public static void main(final String[] args) throws Exception {

        Properties jobProps = HadoopSecureWrapperUtils.loadAzkabanProps();
        HadoopConfigurationInjector.injectResources(new Props(null, jobProps));

        if (HadoopSecureWrapperUtils.shouldProxy(jobProps)) {
            String tokenFile = System.getenv(HADOOP_TOKEN_FILE_LOCATION);
            UserGroupInformation proxyUser = HadoopSecureWrapperUtils.setupProxyUser(jobProps, tokenFile, logger);
            proxyUser.doAs(new PrivilegedExceptionAction<Void>() {
                @Override
                public Void run() throws Exception {
                    runSpark(args, new Configuration());
                    return null;
                }
            });
        } else {
            runSpark(args, new Configuration());
        }
    }

    /**
     * Actually calling the spark-submit command
     * 
     * @param args
     */
    private static void runSpark(String[] args, Configuration conf) {

        if (args.length == 0) {
            throw new RuntimeException("SparkSubmit cannot run with zero args");
        }

        // munge everything together and repartition based by our ^Z character, instead of by the
        // default "space" character
        StringBuilder concat = new StringBuilder();
        concat.append(args[0]);
        for (int i = 1; i < args.length; i++) {
            concat.append(" " + args[i]);
        }

        final String[] newArgs = concat.toString().split(SparkJobArg.delimiter);
        logger.info("newArgs: " + Arrays.toString(newArgs));

        StringBuilder driverJavaOptions = new StringBuilder(newArgs[1]);
        String[] requiredJavaOpts = { WORKFLOW_LINK, JOB_LINK, EXECUTION_LINK, ATTEMPT_LINK };
        for (int i = 0; i < requiredJavaOpts.length; i++) {
            driverJavaOptions.append(" ")
                    .append(HadoopJobUtils.javaOptStringFromHadoopConfiguration(conf, requiredJavaOpts[i]));
        }
        newArgs[1] = driverJavaOptions.toString();
        logger.info("newArgs2: " + Arrays.toString(newArgs));

        org.apache.spark.deploy.SparkSubmit$.MODULE$.main(newArgs);
    }

}