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/*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* 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.dolphinscheduler.plugin.task.api;
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import static org.apache.dolphinscheduler.common.constants.Constants.EMPTY_STRING;
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import static org.apache.dolphinscheduler.common.constants.Constants.SLEEP_TIME_MILLIS;
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import static org.apache.dolphinscheduler.plugin.task.api.TaskConstants.EXIT_CODE_FAILURE;
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import static org.apache.dolphinscheduler.plugin.task.api.TaskConstants.EXIT_CODE_KILL;
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import org.apache.dolphinscheduler.common.constants.TenantConstants;
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import org.apache.dolphinscheduler.common.thread.ThreadUtils;
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import org.apache.dolphinscheduler.common.utils.PropertyUtils;
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import org.apache.dolphinscheduler.plugin.task.api.enums.TaskExecutionStatus;
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import org.apache.dolphinscheduler.plugin.task.api.model.TaskResponse;
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import org.apache.dolphinscheduler.plugin.task.api.utils.AbstractCommandExecutorConstants;
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import org.apache.dolphinscheduler.plugin.task.api.utils.LogUtils;
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import org.apache.dolphinscheduler.plugin.task.api.utils.OSUtils;
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import org.apache.dolphinscheduler.plugin.task.api.utils.ProcessUtils;
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import org.apache.commons.lang3.StringUtils;
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import org.apache.commons.lang3.SystemUtils;
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import java.io.BufferedReader;
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import java.io.File;
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import java.io.IOException;
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import java.io.InputStreamReader;
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import java.lang.reflect.Field;
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import java.util.LinkedList;
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import java.util.List;
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import java.util.concurrent.CompletableFuture;
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import java.util.concurrent.ExecutionException;
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import java.util.concurrent.ExecutorService;
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import java.util.concurrent.Executors;
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import java.util.concurrent.Future;
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import java.util.concurrent.LinkedBlockingQueue;
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import java.util.concurrent.ThreadFactory;
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import java.util.concurrent.TimeUnit;
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import java.util.function.Consumer;
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import java.util.regex.Matcher;
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import java.util.regex.Pattern;
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import org.slf4j.Logger;
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import com.google.common.util.concurrent.ThreadFactoryBuilder;
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import io.fabric8.kubernetes.client.dsl.LogWatch;
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/**
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* abstract command executor
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*/
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public abstract class AbstractCommandExecutor {
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/**
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* rules for extracting Var Pool
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*/
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protected static final Pattern SETVALUE_REGEX = Pattern.compile(TaskConstants.SETVALUE_REGEX);
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protected StringBuilder varPool = new StringBuilder();
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/**
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* process
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*/
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private Process process;
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/**
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* log handler
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*/
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protected Consumer<LinkedBlockingQueue<String>> logHandler;
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/**
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* logger
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*/
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protected Logger logger;
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/**
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* log list
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*/
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protected LinkedBlockingQueue<String> logBuffer;
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protected boolean processLogOutputIsSuccess = false;
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protected boolean podLogOutputIsFinished = false;
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/*
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* SHELL result string
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*/
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protected String taskResultString;
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/**
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* taskRequest
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*/
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protected TaskExecutionContext taskRequest;
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protected Future<?> taskOutputFuture;
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protected Future<?> podLogOutputFuture;
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public AbstractCommandExecutor(Consumer<LinkedBlockingQueue<String>> logHandler,
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TaskExecutionContext taskRequest,
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Logger logger) {
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this.logHandler = logHandler;
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this.taskRequest = taskRequest;
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this.logger = logger;
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this.logBuffer = new LinkedBlockingQueue<>();
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this.logBuffer.add(EMPTY_STRING);
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if (this.taskRequest != null) {
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// set logBufferEnable=true if the task uses logHandler and logBuffer to buffer log messages
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this.taskRequest.setLogBufferEnable(true);
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}
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}
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public AbstractCommandExecutor(LinkedBlockingQueue<String> logBuffer) {
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this.logBuffer = logBuffer;
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}
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/**
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* build process
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*
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* @param commandFile command file
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* @throws IOException IO Exception
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*/
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private void buildProcess(String commandFile) throws IOException {
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// setting up user to run commands
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List<String> command = new LinkedList<>();
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// init process builder
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ProcessBuilder processBuilder = new ProcessBuilder();
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// setting up a working directory
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processBuilder.directory(new File(taskRequest.getExecutePath()));
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// merge error information to standard output stream
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processBuilder.redirectErrorStream(true);
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// if sudo.enable=true,setting up user to run commands
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// todo: Create a ShellExecuteClass to generate the shell and execute shell commands
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if (OSUtils.isSudoEnable() && !TenantConstants.DEFAULT_TENANT_CODE.equals(taskRequest.getTenantCode())) {
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if (SystemUtils.IS_OS_LINUX
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&& PropertyUtils.getBoolean(AbstractCommandExecutorConstants.TASK_RESOURCE_LIMIT_STATE)) {
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generateCgroupCommand(command);
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} else {
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command.add("sudo");
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command.add("-u");
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command.add(taskRequest.getTenantCode());
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command.add("-E");
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}
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}
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command.add(commandInterpreter());
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command.add(commandFile);
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// setting commands
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processBuilder.command(command);
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process = processBuilder.start();
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printCommand(command);
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}
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/**
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* generate systemd command.
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* eg: sudo systemd-run -q --scope -p CPUQuota=100% -p MemoryLimit=200M --uid=root
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* @param command command
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*/
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private void generateCgroupCommand(List<String> command) {
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Integer cpuQuota = taskRequest.getCpuQuota();
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Integer memoryMax = taskRequest.getMemoryMax();
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command.add("sudo");
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command.add("systemd-run");
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command.add("-q");
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command.add("--scope");
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if (cpuQuota == -1) {
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command.add("-p");
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command.add("CPUQuota=");
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} else {
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command.add("-p");
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command.add(String.format("CPUQuota=%s%%", taskRequest.getCpuQuota()));
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}
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// use `man systemd.resource-control` to find available parameter
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if (memoryMax == -1) {
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command.add("-p");
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command.add(String.format("MemoryLimit=%s", "infinity"));
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} else {
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command.add("-p");
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command.add(String.format("MemoryLimit=%sM", taskRequest.getMemoryMax()));
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}
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command.add(String.format("--uid=%s", taskRequest.getTenantCode()));
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}
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public TaskResponse run(String execCommand, TaskCallBack taskCallBack) throws Exception {
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TaskResponse result = new TaskResponse();
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int taskInstanceId = taskRequest.getTaskInstanceId();
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if (null == TaskExecutionContextCacheManager.getByTaskInstanceId(taskInstanceId)) {
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result.setExitStatusCode(EXIT_CODE_KILL);
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return result;
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}
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if (StringUtils.isEmpty(execCommand)) {
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TaskExecutionContextCacheManager.removeByTaskInstanceId(taskInstanceId);
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return result;
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}
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String commandFilePath = buildCommandFilePath();
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// create command file if not exists
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createCommandFileIfNotExists(execCommand, commandFilePath);
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// build process
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buildProcess(commandFilePath);
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// parse process output
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parseProcessOutput(process);
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// collect pod log
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collectPodLogIfNeeded();
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int processId = getProcessId(process);
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result.setProcessId(processId);
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// cache processId
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taskRequest.setProcessId(processId);
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boolean updateTaskExecutionContextStatus =
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TaskExecutionContextCacheManager.updateTaskExecutionContext(taskRequest);
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if (Boolean.FALSE.equals(updateTaskExecutionContextStatus)) {
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result.setExitStatusCode(EXIT_CODE_KILL);
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cancelApplication();
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return result;
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}
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// print process id
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logger.info("process start, process id is: {}", processId);
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// if timeout occurs, exit directly
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long remainTime = getRemainTime();
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// update pid before waiting for the run to finish
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if (null != taskCallBack) {
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taskCallBack.updateTaskInstanceInfo(taskInstanceId);
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}
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// waiting for the run to finish
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boolean status = process.waitFor(remainTime, TimeUnit.SECONDS);
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if (taskOutputFuture != null) {
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try {
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// Wait the task log process finished.
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taskOutputFuture.get();
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} catch (ExecutionException e) {
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logger.info("Handle task log error", e);
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}
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}
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if (podLogOutputFuture != null) {
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try {
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// Wait kubernetes pod log collection finished
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podLogOutputFuture.get();
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// delete pod after successful execution and log collection
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ProcessUtils.cancelApplication(taskRequest);
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} catch (ExecutionException e) {
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logger.error("Handle pod log error", e);
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}
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}
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TaskExecutionStatus kubernetesStatus =
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ProcessUtils.getApplicationStatus(taskRequest.getK8sTaskExecutionContext(), taskRequest.getTaskAppId());
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// if SHELL task exit
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if (status && kubernetesStatus.isSuccess()) {
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// SHELL task state
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result.setExitStatusCode(process.exitValue());
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} else {
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logger.error("process has failure, the task timeout configuration value is:{}, ready to kill ...",
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taskRequest.getTaskTimeout());
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result.setExitStatusCode(EXIT_CODE_FAILURE);
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cancelApplication();
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}
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int exitCode = process.exitValue();
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String exitLogMessage = EXIT_CODE_KILL == exitCode ? "process has killed." : "process has exited.";
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logger.info("{} execute path:{}, processId:{} ,exitStatusCode:{} ,processWaitForStatus:{} ,processExitValue:{}",
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exitLogMessage, taskRequest.getExecutePath(), processId, result.getExitStatusCode(), status, exitCode);
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return result;
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}
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public String getVarPool() {
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return varPool.toString();
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}
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public void cancelApplication() throws InterruptedException {
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if (process == null) {
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return;
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}
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// soft kill
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logger.info("Begin to kill process process, pid is : {}", taskRequest.getProcessId());
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process.destroy();
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if (!process.waitFor(5, TimeUnit.SECONDS)) {
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process.destroyForcibly();
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}
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logger.info("Success kill task: {}, pid: {}", taskRequest.getTaskAppId(), taskRequest.getProcessId());
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}
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private void printCommand(List<String> commands) {
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logger.info("task run command: {}", String.join(" ", commands));
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}
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private void collectPodLogIfNeeded() {
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if (null == taskRequest.getK8sTaskExecutionContext()) {
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podLogOutputIsFinished = true;
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return;
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}
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// wait for launching (driver) pod
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ThreadUtils.sleep(SLEEP_TIME_MILLIS * 5L);
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LogWatch watcher =
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ProcessUtils.getPodLogWatcher(taskRequest.getK8sTaskExecutionContext(), taskRequest.getTaskAppId());
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if (watcher != null) {
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ExecutorService collectPodLogExecutorService = ThreadUtils
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.newSingleDaemonScheduledExecutorService("CollectPodLogOutput-thread-" + taskRequest.getTaskName());
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podLogOutputFuture = collectPodLogExecutorService.submit(() -> {
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try {
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String line;
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try (BufferedReader reader = new BufferedReader(new InputStreamReader(watcher.getOutput()))) {
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while ((line = reader.readLine()) != null) {
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logBuffer.add(String.format("[K8S-pod-log-%s]: %s", taskRequest.getTaskName(), line));
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}
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}
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} catch (Exception e) {
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throw new RuntimeException(e);
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} finally {
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watcher.close();
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podLogOutputIsFinished = true;
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}
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});
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collectPodLogExecutorService.shutdown();
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} else {
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CompletableFuture<String> exceptionalFuture = new CompletableFuture<>();
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exceptionalFuture.completeExceptionally(new RuntimeException("The driver pod does not exist."));
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podLogOutputFuture = exceptionalFuture;
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podLogOutputIsFinished = true;
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}
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}
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private void parseProcessOutput(Process process) {
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// todo: remove this this thread pool.
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ExecutorService getOutputLogService = ThreadUtils
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.newSingleDaemonScheduledExecutorService("ResolveOutputLog-thread-" + taskRequest.getTaskName());
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getOutputLogService.submit(() -> {
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try (
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final LogUtils.MDCAutoClosableContext mdcAutoClosableContext =
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LogUtils.setTaskInstanceLogFullPathMDC(taskRequest.getLogPath());
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BufferedReader inReader = new BufferedReader(new InputStreamReader(process.getInputStream()))) {
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String line;
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while ((line = inReader.readLine()) != null) {
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if (line.startsWith("${setValue(") || line.startsWith("#{setValue(")) {
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varPool.append(findVarPool(line));
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varPool.append("$VarPool$");
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} else {
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logBuffer.add(line);
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taskResultString = line;
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}
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}
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processLogOutputIsSuccess = true;
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} catch (Exception e) {
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logger.error("Parse var pool error", e);
|
|
|
|
processLogOutputIsSuccess = true;
|
|
|
|
}
|
|
|
|
});
|
|
|
|
|
|
|
|
getOutputLogService.shutdown();
|
|
|
|
|
|
|
|
ExecutorService parseProcessOutputExecutorService = ThreadUtils
|
|
|
|
.newSingleDaemonScheduledExecutorService("TaskInstanceLogOutput-thread-" + taskRequest.getTaskName());
|
|
|
|
taskOutputFuture = parseProcessOutputExecutorService.submit(() -> {
|
|
|
|
try (
|
|
|
|
final LogUtils.MDCAutoClosableContext mdcAutoClosableContext =
|
|
|
|
LogUtils.setTaskInstanceLogFullPathMDC(taskRequest.getLogPath());) {
|
|
|
|
while (logBuffer.size() > 1 || !processLogOutputIsSuccess || !podLogOutputIsFinished) {
|
|
|
|
if (logBuffer.size() > 1) {
|
|
|
|
logHandler.accept(logBuffer);
|
|
|
|
logBuffer.clear();
|
|
|
|
logBuffer.add(EMPTY_STRING);
|
|
|
|
} else {
|
|
|
|
Thread.sleep(TaskConstants.DEFAULT_LOG_FLUSH_INTERVAL);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
} catch (Exception e) {
|
|
|
|
logger.error("Output task log error", e);
|
|
|
|
}
|
|
|
|
});
|
|
|
|
parseProcessOutputExecutorService.shutdown();
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* find var pool
|
|
|
|
*
|
|
|
|
* @param line
|
|
|
|
* @return
|
|
|
|
*/
|
|
|
|
private String findVarPool(String line) {
|
|
|
|
Matcher matcher = SETVALUE_REGEX.matcher(line);
|
|
|
|
if (matcher.find()) {
|
|
|
|
return matcher.group(1);
|
|
|
|
}
|
|
|
|
return null;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* get remain time(s)
|
|
|
|
*
|
|
|
|
* @return remain time
|
|
|
|
*/
|
|
|
|
private long getRemainTime() {
|
|
|
|
long usedTime = (System.currentTimeMillis() - taskRequest.getStartTime()) / 1000;
|
|
|
|
long remainTime = taskRequest.getTaskTimeout() - usedTime;
|
|
|
|
|
|
|
|
if (remainTime < 0) {
|
|
|
|
throw new RuntimeException("task execution time out");
|
|
|
|
}
|
|
|
|
|
|
|
|
return remainTime;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* get process id
|
|
|
|
*
|
|
|
|
* @param process process
|
|
|
|
* @return process id
|
|
|
|
*/
|
|
|
|
private int getProcessId(Process process) {
|
|
|
|
int processId = 0;
|
|
|
|
|
|
|
|
try {
|
|
|
|
Field f = process.getClass().getDeclaredField(TaskConstants.PID);
|
|
|
|
f.setAccessible(true);
|
|
|
|
|
|
|
|
processId = f.getInt(process);
|
|
|
|
} catch (Exception e) {
|
|
|
|
logger.error("Get task pid failed", e);
|
|
|
|
}
|
|
|
|
|
|
|
|
return processId;
|
|
|
|
}
|
|
|
|
|
|
|
|
protected abstract String buildCommandFilePath();
|
|
|
|
|
|
|
|
protected abstract void createCommandFileIfNotExists(String execCommand, String commandFile) throws IOException;
|
|
|
|
|
|
|
|
ExecutorService newDaemonSingleThreadExecutor(String threadName) {
|
|
|
|
ThreadFactory threadFactory = new ThreadFactoryBuilder()
|
|
|
|
.setDaemon(true)
|
|
|
|
.setNameFormat(threadName)
|
|
|
|
.build();
|
|
|
|
return Executors.newSingleThreadExecutor(threadFactory);
|
|
|
|
}
|
|
|
|
|
|
|
|
protected abstract String commandInterpreter();
|
|
|
|
}
|