| /** |
| * 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.logaggregation.filecontroller; |
| |
| import com.google.common.annotations.VisibleForTesting; |
| import com.google.common.base.Preconditions; |
| import java.io.IOException; |
| import java.util.ArrayList; |
| import java.util.Collection; |
| import java.util.HashMap; |
| import java.util.LinkedList; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.regex.Pattern; |
| import org.apache.commons.lang.StringUtils; |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| import org.apache.hadoop.classification.InterfaceAudience.Private; |
| import org.apache.hadoop.classification.InterfaceStability.Unstable; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.fs.FileContext; |
| import org.apache.hadoop.fs.FileStatus; |
| import org.apache.hadoop.fs.Path; |
| import org.apache.hadoop.fs.RemoteIterator; |
| import org.apache.hadoop.util.ReflectionUtils; |
| import org.apache.hadoop.yarn.api.records.ApplicationId; |
| import org.apache.hadoop.yarn.conf.YarnConfiguration; |
| |
| /** |
| * Use {@code LogAggregationFileControllerFactory} to get the correct |
| * {@link LogAggregationFileController} for write and read. |
| * |
| */ |
| @Private |
| @Unstable |
| public class LogAggregationFileControllerFactory { |
| |
| private static final Log LOG = LogFactory.getLog( |
| LogAggregationFileControllerFactory.class); |
| private final Pattern p = Pattern.compile( |
| "^[A-Za-z_]+[A-Za-z0-9_]*$"); |
| private LinkedList<LogAggregationFileController> controllers |
| = new LinkedList<>(); |
| private Configuration conf; |
| |
| /** |
| * Construct the LogAggregationFileControllerFactory object. |
| * @param conf the Configuration |
| */ |
| public LogAggregationFileControllerFactory(Configuration conf) { |
| this.conf = conf; |
| Collection<String> fileControllers = conf.getStringCollection( |
| YarnConfiguration.LOG_AGGREGATION_FILE_FORMATS); |
| List<String> controllerClassName = new ArrayList<>(); |
| |
| Map<String, String> controllerChecker = new HashMap<>(); |
| |
| for (String fileController : fileControllers) { |
| Preconditions.checkArgument(validateAggregatedFileControllerName( |
| fileController), "The FileControllerName: " + fileController |
| + " set in " + YarnConfiguration.LOG_AGGREGATION_FILE_FORMATS |
| +" is invalid." + "The valid File Controller name should only " |
| + "contain a-zA-Z0-9_ and can not start with numbers"); |
| |
| String remoteDirStr = String.format( |
| YarnConfiguration.LOG_AGGREGATION_REMOTE_APP_LOG_DIR_FMT, |
| fileController); |
| String remoteDir = conf.get(remoteDirStr); |
| boolean defaultRemoteDir = false; |
| if (remoteDir == null || remoteDir.isEmpty()) { |
| remoteDir = conf.get(YarnConfiguration.NM_REMOTE_APP_LOG_DIR, |
| YarnConfiguration.DEFAULT_NM_REMOTE_APP_LOG_DIR); |
| defaultRemoteDir = true; |
| } |
| String suffixStr = String.format( |
| YarnConfiguration.LOG_AGGREGATION_REMOTE_APP_LOG_DIR_SUFFIX_FMT, |
| fileController); |
| String suffix = conf.get(suffixStr); |
| boolean defaultSuffix = false; |
| if (suffix == null || suffix.isEmpty()) { |
| suffix = conf.get(YarnConfiguration.NM_REMOTE_APP_LOG_DIR_SUFFIX, |
| YarnConfiguration.DEFAULT_NM_REMOTE_APP_LOG_DIR_SUFFIX); |
| defaultSuffix = true; |
| } |
| String dirSuffix = remoteDir + "-" + suffix; |
| if (controllerChecker.containsKey(dirSuffix)) { |
| if (defaultRemoteDir && defaultSuffix) { |
| String fileControllerStr = controllerChecker.get(dirSuffix); |
| List<String> controllersList = new ArrayList<>(); |
| controllersList.add(fileControllerStr); |
| controllersList.add(fileController); |
| fileControllerStr = StringUtils.join(controllersList, ","); |
| controllerChecker.put(dirSuffix, fileControllerStr); |
| } else { |
| String conflictController = controllerChecker.get(dirSuffix); |
| throw new RuntimeException("The combined value of " + remoteDirStr |
| + " and " + suffixStr + " should not be the same as the value" |
| + " set for " + conflictController); |
| } |
| } else { |
| controllerChecker.put(dirSuffix, fileController); |
| } |
| String classKey = String.format( |
| YarnConfiguration.LOG_AGGREGATION_FILE_CONTROLLER_FMT, |
| fileController); |
| String className = conf.get(classKey); |
| if (className == null || className.isEmpty()) { |
| throw new RuntimeException("No class configured for " |
| + fileController); |
| } |
| controllerClassName.add(className); |
| Class<? extends LogAggregationFileController> sClass = conf.getClass( |
| classKey, null, LogAggregationFileController.class); |
| if (sClass == null) { |
| throw new RuntimeException("No class defined for " + fileController); |
| } |
| LogAggregationFileController s = ReflectionUtils.newInstance( |
| sClass, conf); |
| if (s == null) { |
| throw new RuntimeException("No object created for " |
| + controllerClassName); |
| } |
| s.initialize(conf, fileController); |
| controllers.add(s); |
| } |
| } |
| |
| /** |
| * Get {@link LogAggregationFileController} to write. |
| * @return the LogAggregationFileController instance |
| */ |
| public LogAggregationFileController getFileControllerForWrite() { |
| return controllers.getFirst(); |
| } |
| |
| /** |
| * Get {@link LogAggregationFileController} to read the aggregated logs |
| * for this application. |
| * @param appId the ApplicationId |
| * @param appOwner the Application Owner |
| * @return the LogAggregationFileController instance |
| * @throws IOException if can not find any log aggregation file controller |
| */ |
| public LogAggregationFileController getFileControllerForRead( |
| ApplicationId appId, String appOwner) throws IOException { |
| StringBuilder diagnosis = new StringBuilder(); |
| for(LogAggregationFileController fileController : controllers) { |
| try { |
| Path remoteAppLogDir = fileController.getRemoteAppLogDir( |
| appId, appOwner); |
| Path qualifiedLogDir = FileContext.getFileContext(conf).makeQualified( |
| remoteAppLogDir); |
| RemoteIterator<FileStatus> nodeFiles = FileContext.getFileContext( |
| qualifiedLogDir.toUri(), conf).listStatus(remoteAppLogDir); |
| if (nodeFiles.hasNext()) { |
| return fileController; |
| } |
| } catch (Exception ex) { |
| diagnosis.append(ex.getMessage() + "\n"); |
| continue; |
| } |
| } |
| throw new IOException(diagnosis.toString()); |
| } |
| |
| private boolean validateAggregatedFileControllerName(String name) { |
| if (name == null || name.trim().isEmpty()) { |
| return false; |
| } |
| return p.matcher(name).matches(); |
| } |
| |
| @Private |
| @VisibleForTesting |
| public LinkedList<LogAggregationFileController> |
| getConfiguredLogAggregationFileControllerList() { |
| return this.controllers; |
| } |
| } |