| // 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 com.cloud.hypervisor.kvm.resource.rolling.maintenance; |
| |
| import com.cloud.utils.Pair; |
| import com.cloud.utils.exception.CloudRuntimeException; |
| import com.cloud.utils.script.OutputInterpreter; |
| import com.cloud.utils.script.Script; |
| import org.apache.commons.lang3.StringUtils; |
| import org.apache.log4j.Logger; |
| |
| import java.io.File; |
| import java.io.IOException; |
| import java.nio.charset.StandardCharsets; |
| import java.nio.file.Files; |
| import java.nio.file.Paths; |
| import java.util.stream.Stream; |
| |
| public class RollingMaintenanceServiceExecutor extends RollingMaintenanceExecutorBase implements RollingMaintenanceExecutor { |
| |
| private static final String servicePrefix = "cloudstack-rolling-maintenance"; |
| private static final String resultsFileSuffix = "rolling-maintenance-results"; |
| private static final String outputFileSuffix = "rolling-maintenance-output"; |
| |
| private static final Logger s_logger = Logger.getLogger(RollingMaintenanceServiceExecutor.class); |
| |
| public RollingMaintenanceServiceExecutor(String hooksDir) { |
| super(hooksDir); |
| } |
| |
| /** |
| * Generate and return escaped instance name to use on systemd service invokation |
| */ |
| private String generateInstanceName(String stage, String file, String payload) { |
| String instanceName = String.format("%s,%s,%s,%s,%s", stage, file, getTimeout(), |
| getResultsFilePath(), getOutputFilePath()); |
| if (StringUtils.isNotBlank(payload)) { |
| instanceName += "," + payload; |
| } |
| return Script.runSimpleBashScript(String.format("systemd-escape '%s'", instanceName)); |
| } |
| |
| private String invokeService(String action, String stage, String file, String payload) { |
| s_logger.debug("Invoking rolling maintenance service for stage: " + stage + " and file " + file + " with action: " + action); |
| final OutputInterpreter.AllLinesParser parser = new OutputInterpreter.AllLinesParser(); |
| Script command = new Script("/bin/systemctl", s_logger); |
| command.add(action); |
| String service = servicePrefix + "@" + generateInstanceName(stage, file, payload); |
| command.add(service); |
| String result = command.execute(parser); |
| int exitValue = command.getExitValue(); |
| s_logger.trace("Execution: " + command.toString() + " - exit code: " + exitValue + |
| ": " + result + (StringUtils.isNotBlank(parser.getLines()) ? parser.getLines() : "")); |
| return StringUtils.isBlank(result) ? parser.getLines().replace("\n", " ") : result; |
| } |
| |
| @Override |
| public Pair<Boolean, String> startStageExecution(String stage, File scriptFile, int timeout, String payload) { |
| checkHooksDirectory(); |
| setTimeout(timeout); |
| String result = invokeService("start", stage, scriptFile.getAbsolutePath(), payload); |
| if (StringUtils.isNotBlank(result)) { |
| throw new CloudRuntimeException("Error starting stage: " + stage + " execution: " + result); |
| } |
| s_logger.trace("Stage " + stage + "execution started"); |
| return new Pair<>(true, "OK"); |
| } |
| |
| private String getResultsFilePath() { |
| return getHooksDir() + resultsFileSuffix; |
| } |
| |
| private String getOutputFilePath() { |
| return getHooksDir() + outputFileSuffix; |
| } |
| |
| private String readFromFile(String filePath) { |
| StringBuilder contentBuilder = new StringBuilder(); |
| |
| try (Stream<String> stream = Files.lines( Paths.get(filePath), StandardCharsets.UTF_8)) { |
| stream.forEach(s -> contentBuilder.append(s).append("\n")); |
| } catch (IOException e) { |
| e.printStackTrace(); |
| } |
| |
| return contentBuilder.toString(); |
| } |
| |
| @Override |
| public String getStageExecutionOutput(String stage, File scriptFile) { |
| return readFromFile(getOutputFilePath()); |
| } |
| |
| @Override |
| public boolean isStageRunning(String stage, File scriptFile, String payload) { |
| String result = invokeService("is-active", stage, scriptFile.getAbsolutePath(), payload); |
| if (StringUtils.isNotBlank(result) && result.equals("failed")) { |
| String status = invokeService("status", stage, scriptFile.getAbsolutePath(), payload); |
| String errorMsg = "Stage " + stage + " execution failed, status: " + status; |
| s_logger.error(errorMsg); |
| throw new CloudRuntimeException(errorMsg); |
| } |
| return StringUtils.isNotBlank(result) && result.equals("active"); |
| } |
| |
| @Override |
| public boolean getStageExecutionSuccess(String stage, File scriptFile) { |
| String fileContent = readFromFile(getResultsFilePath()); |
| if (StringUtils.isBlank(fileContent)) { |
| throw new CloudRuntimeException("Empty content in file " + getResultsFilePath()); |
| } |
| fileContent = fileContent.replace("\n", ""); |
| String[] parts = fileContent.split(","); |
| if (parts.length < 3) { |
| throw new CloudRuntimeException("Results file " + getResultsFilePath() + " unexpected content: " + fileContent); |
| } |
| if (!parts[0].equalsIgnoreCase(stage)) { |
| throw new CloudRuntimeException("Expected stage " + stage + " results but got stage " + parts[0]); |
| } |
| setAvoidMaintenance(Boolean.parseBoolean(parts[2])); |
| return Boolean.parseBoolean(parts[1]); |
| } |
| } |