/**
* 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.server.nodemanager;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.TimerTask;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileContext;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.yarn.api.records.NodeHealthStatus;
import org.apache.hadoop.yarn.conf.YarnConfiguration;
import org.apache.hadoop.yarn.factories.RecordFactory;
import org.apache.hadoop.yarn.factory.providers.RecordFactoryProvider;
import org.junit.After;
import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;
public class TestNodeHealthService {
private static volatile Log LOG = LogFactory
.getLog(TestNodeHealthService.class);
protected static File testRootDir = new File("target",
TestNodeHealthService.class.getName() + "-localDir").getAbsoluteFile();
final static File nodeHealthConfigFile = new File(testRootDir,
"modified-mapred-site.xml");
private File nodeHealthscriptFile = new File(testRootDir,
"failingscript.sh");
@Before
public void setup() {
testRootDir.mkdirs();
}
@After
public void tearDown() throws Exception {
if (testRootDir.exists()) {
FileContext.getLocalFSFileContext().delete(
new Path(testRootDir.getAbsolutePath()), true);
}
}
private Configuration getConfForNodeHealthScript() {
Configuration conf = new Configuration();
conf.set(YarnConfiguration.NM_HEALTH_CHECK_SCRIPT_PATH,
nodeHealthscriptFile.getAbsolutePath());
conf.setLong(YarnConfiguration.NM_HEALTH_CHECK_INTERVAL_MS, 500);
conf.setLong(
YarnConfiguration.NM_HEALTH_CHECK_SCRIPT_TIMEOUT_MS, 1000);
return conf;
}
private void writeNodeHealthScriptFile(String scriptStr, boolean setExecutable)
throws IOException {
PrintWriter pw = new PrintWriter(new FileOutputStream(nodeHealthscriptFile));
pw.println(scriptStr);
pw.flush();
pw.close();
nodeHealthscriptFile.setExecutable(setExecutable);
}
@Test
public void testNodeHealthScriptShouldRun() throws IOException {
// Node health script should not start if there is no property called
// node health script path.
Assert.assertFalse("By default Health script should not have started",
NodeHealthScriptRunner.shouldRun(new Configuration()));
Configuration conf = getConfForNodeHealthScript();
// Node health script should not start if the node health script does not
// exists
Assert.assertFalse("Node health script should start",
NodeHealthScriptRunner.shouldRun(conf));
// Create script path.
conf.writeXml(new FileOutputStream(nodeHealthConfigFile));
conf.addResource(nodeHealthConfigFile.getName());
writeNodeHealthScriptFile("", false);
// Node health script should not start if the node health script is not
// executable.
Assert.assertFalse("Node health script should start",
NodeHealthScriptRunner.shouldRun(conf));
writeNodeHealthScriptFile("", true);
Assert.assertTrue("Node health script should start",
NodeHealthScriptRunner.shouldRun(conf));
}
private void setHealthStatus(NodeHealthStatus healthStatus, boolean isHealthy,
String healthReport, long lastHealthReportTime) {
healthStatus.setHealthReport(healthReport);
healthStatus.setIsNodeHealthy(isHealthy);
healthStatus.setLastHealthReportTime(lastHealthReportTime);
}
@Test
public void testNodeHealthScript() throws Exception {
RecordFactory factory = RecordFactoryProvider.getRecordFactory(null);
NodeHealthStatus healthStatus =
factory.newRecordInstance(NodeHealthStatus.class);
String errorScript = "echo ERROR\n echo \"Tracker not healthy\"";
String normalScript = "echo \"I am all fine\"";
String timeOutScript = "sleep 4\n echo\"I am fine\"";
Configuration conf = getConfForNodeHealthScript();
conf.writeXml(new FileOutputStream(nodeHealthConfigFile));
conf.addResource(nodeHealthConfigFile.getName());
writeNodeHealthScriptFile(normalScript, true);
NodeHealthCheckerService nodeHealthChecker = new NodeHealthCheckerService();
nodeHealthChecker.init(conf);
NodeHealthScriptRunner nodeHealthScriptRunner =
nodeHealthChecker.getNodeHealthScriptRunner();
TimerTask timerTask = nodeHealthScriptRunner.getTimerTask();
timerTask.run();
setHealthStatus(healthStatus, nodeHealthChecker.isHealthy(),
nodeHealthChecker.getHealthReport(),
nodeHealthChecker.getLastHealthReportTime());
LOG.info("Checking initial healthy condition");
// Check proper report conditions.
Assert.assertTrue("Node health status reported unhealthy", healthStatus
.getIsNodeHealthy());
Assert.assertTrue("Node health status reported unhealthy", healthStatus
.getHealthReport().equals(nodeHealthChecker.getHealthReport()));
// write out error file.
// Healthy to unhealthy transition
writeNodeHealthScriptFile(errorScript, true);
// Run timer
timerTask.run();
// update health status
setHealthStatus(healthStatus, nodeHealthChecker.isHealthy(),
nodeHealthChecker.getHealthReport(),
nodeHealthChecker.getLastHealthReportTime());
LOG.info("Checking Healthy--->Unhealthy");
Assert.assertFalse("Node health status reported healthy", healthStatus
.getIsNodeHealthy());
Assert.assertTrue("Node health status reported healthy", healthStatus
.getHealthReport().equals(nodeHealthChecker.getHealthReport()));
// Check unhealthy to healthy transitions.
writeNodeHealthScriptFile(normalScript, true);
timerTask.run();
setHealthStatus(healthStatus, nodeHealthChecker.isHealthy(),
nodeHealthChecker.getHealthReport(),
nodeHealthChecker.getLastHealthReportTime());
LOG.info("Checking UnHealthy--->healthy");
// Check proper report conditions.
Assert.assertTrue("Node health status reported unhealthy", healthStatus
.getIsNodeHealthy());
Assert.assertTrue("Node health status reported unhealthy", healthStatus
.getHealthReport().equals(nodeHealthChecker.getHealthReport()));
// Healthy to timeout transition.
writeNodeHealthScriptFile(timeOutScript, true);
timerTask.run();
setHealthStatus(healthStatus, nodeHealthChecker.isHealthy(),
nodeHealthChecker.getHealthReport(),
nodeHealthChecker.getLastHealthReportTime());
LOG.info("Checking Healthy--->timeout");
Assert.assertFalse("Node health status reported healthy even after timeout",
healthStatus.getIsNodeHealthy());
Assert.assertTrue("Node script time out message not propogated",
healthStatus.getHealthReport().equals(
NodeHealthScriptRunner.NODE_HEALTH_SCRIPT_TIMED_OUT_MSG
+ NodeHealthCheckerService.SEPARATOR
+ nodeHealthChecker.getDiskHandler().getDisksHealthReport()));
}
}