/**
* 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.falcon.logging;
import org.apache.commons.cli.CommandLine;
import org.apache.commons.cli.GnuParser;
import org.apache.commons.cli.Option;
import org.apache.commons.cli.Options;
import org.apache.commons.cli.ParseException;
import org.apache.falcon.entity.v0.EntityType;
import org.apache.falcon.entity.v0.process.EngineType;
import org.apache.hadoop.conf.Configured;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.IOUtils;
import org.apache.hadoop.util.ReflectionUtils;
import org.apache.hadoop.util.Tool;
import org.apache.hadoop.util.ToolRunner;
import org.apache.log4j.Logger;
import org.apache.oozie.client.OozieClient;
import org.apache.oozie.client.OozieClientException;
import org.apache.oozie.client.WorkflowAction;
import org.apache.oozie.client.WorkflowJob;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.URL;
import java.net.URLConnection;
import java.util.Arrays;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
/**
* Utility called in the post process of oozie workflow to move oozie action executor log.
*/
public class LogMover extends Configured implements Tool {
private static final Logger LOG = Logger.getLogger(LogMover.class);
public static final Set<String> FALCON_ACTIONS =
new HashSet<String>(Arrays.asList(new String[]{"eviction", "replication", }));
/**
* Args to the command.
*/
private static class ARGS {
private String oozieUrl;
private String subflowId;
private String runId;
private String logDir;
private String entityType;
private String userWorkflowEngine;
}
public static void main(String[] args) throws Exception {
ToolRunner.run(new LogMover(), args);
}
@Override
public int run(String[] arguments) throws Exception {
try {
ARGS args = new ARGS();
setupArgs(arguments, args);
OozieClient client = new OozieClient(args.oozieUrl);
WorkflowJob jobInfo;
try {
jobInfo = client.getJobInfo(args.subflowId);
} catch (OozieClientException e) {
LOG.error("Error getting jobinfo for: " + args.subflowId, e);
return 0;
}
Path path = new Path(args.logDir + "/"
+ String.format("%03d", Integer.parseInt(args.runId)));
FileSystem fs = path.getFileSystem(getConf());
if (args.entityType.equalsIgnoreCase(EntityType.FEED.name())
|| notUserWorkflowEngineIsOozie(args.userWorkflowEngine)) {
// if replication wf, retention wf or PIG Process
copyOozieLog(client, fs, path, jobInfo.getId());
List<WorkflowAction> workflowActions = jobInfo.getActions();
for (int i=0; i < workflowActions.size(); i++) {
if (FALCON_ACTIONS.contains(workflowActions.get(i).getName())) {
copyTTlogs(fs, path, jobInfo.getActions().get(i));
break;
}
}
} else {
// if process wf with oozie engine
String subflowId = jobInfo.getExternalId();
copyOozieLog(client, fs, path, subflowId);
WorkflowJob subflowInfo = client.getJobInfo(subflowId);
List<WorkflowAction> actions = subflowInfo.getActions();
for (WorkflowAction action : actions) {
if (action.getType().equals("pig")
|| action.getType().equals("java")) {
copyTTlogs(fs, path, action);
} else {
LOG.info("Ignoring hadoop TT log for non-pig and non-java action:"
+ action.getName());
}
}
}
} catch (Exception e) {
LOG.error("Exception in log mover:", e);
}
return 0;
}
private boolean notUserWorkflowEngineIsOozie(String userWorkflowEngine) {
// userWorkflowEngine will be null for replication and "pig" for pig
return userWorkflowEngine != null && EngineType.fromValue(userWorkflowEngine) != EngineType.OOZIE;
}
private void copyOozieLog(OozieClient client, FileSystem fs, Path path,
String id) throws OozieClientException, IOException {
InputStream in = new ByteArrayInputStream(client.getJobLog(id).getBytes());
OutputStream out = fs.create(new Path(path, "oozie.log"));
IOUtils.copyBytes(in, out, 4096, true);
LOG.info("Copied oozie log to " + path);
}
private void copyTTlogs(FileSystem fs, Path path,
WorkflowAction action) throws Exception {
String ttLogURL = getTTlogURL(action.getExternalId());
if (ttLogURL != null) {
LOG.info("Fetching log for action: " + action.getExternalId()
+ " from url: " + ttLogURL);
InputStream in = getURLinputStream(new URL(ttLogURL));
OutputStream out = fs.create(new Path(path, action.getName() + "_"
+ getMappedStatus(action.getStatus()) + ".log"));
IOUtils.copyBytes(in, out, 4096, true);
LOG.info("Copied log to " + path);
}
}
private String getMappedStatus(WorkflowAction.Status status) {
if (status == WorkflowAction.Status.FAILED
|| status == WorkflowAction.Status.KILLED
|| status == WorkflowAction.Status.ERROR) {
return "FAILED";
} else {
return "SUCCEEDED";
}
}
private void setupArgs(String[] arguments, ARGS args) throws ParseException {
Options options = new Options();
Option opt = new Option("workflowEngineUrl", true, "url of workflow engine, ex:oozie");
opt.setRequired(true);
options.addOption(opt);
opt = new Option("subflowId", true, "external id of userworkflow");
opt.setRequired(true);
options.addOption(opt);
opt = new Option("userWorkflowEngine", true, "user workflow engine type");
opt.setRequired(false); // replication will NOT have this arg sent
options.addOption(opt);
opt = new Option("runId", true, "current workflow's runid");
opt.setRequired(true);
options.addOption(opt);
opt = new Option("logDir", true, "log dir where job logs are stored");
opt.setRequired(true);
options.addOption(opt);
opt = new Option("status", true, "user workflow status");
opt.setRequired(true);
options.addOption(opt);
opt = new Option("entityType", true, "entity type feed or process");
opt.setRequired(true);
options.addOption(opt);
CommandLine cmd = new GnuParser().parse(options, arguments);
args.oozieUrl = cmd.getOptionValue("workflowEngineUrl");
args.subflowId = cmd.getOptionValue("subflowId");
args.userWorkflowEngine = cmd.getOptionValue("userWorkflowEngine");
args.runId = cmd.getOptionValue("runId");
args.logDir = cmd.getOptionValue("logDir");
args.entityType = cmd.getOptionValue("entityType");
}
private String getTTlogURL(String jobId) throws Exception {
TaskLogURLRetriever logRetriever = ReflectionUtils.newInstance(getLogRetrieverClassName(), getConf());
return logRetriever.retrieveTaskLogURL(jobId);
}
@SuppressWarnings("unchecked")
private Class<? extends TaskLogURLRetriever> getLogRetrieverClassName() {
try {
return (Class<? extends TaskLogURLRetriever>)
Class.forName("org.apache.falcon.logging.v1.TaskLogRetrieverV1");
} catch (ClassNotFoundException e) {
LOG.warn("V1 Retriever missing, falling back to Default retriever");
return DefaultTaskLogRetriever.class;
}
}
private InputStream getURLinputStream(URL url) throws IOException {
URLConnection connection = url.openConnection();
connection.setDoOutput(true);
connection.connect();
return connection.getInputStream();
}
}