/**
* 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.hbase;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.assertEquals;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.PrintWriter;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.hbase.HBaseTestingUtility;
import org.apache.hadoop.hbase.HConstants;
import org.apache.hadoop.hbase.SmallTests;
import org.apache.hadoop.hbase.Stoppable;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.hbase.HealthChecker.HealthCheckerExitStatus;
import org.junit.After;
import org.junit.Test;
import org.junit.experimental.categories.Category;
@Category(SmallTests.class)
public class TestNodeHealthCheckChore {
private static final Log LOG = LogFactory.getLog(TestNodeHealthCheckChore.class);
private static final HBaseTestingUtility UTIL = new HBaseTestingUtility();
private File healthScriptFile;
@After
public void cleanUp() throws IOException {
// delete and recreate the test directory, ensuring a clean test dir between tests
Path testDir = UTIL.getDataTestDir();
FileSystem fs = UTIL.getTestFileSystem();
fs.delete(testDir, true);
if (!fs.mkdirs(testDir)) throw new IOException("Failed mkdir " + testDir);
}
@Test
public void testHealthChecker() throws Exception {
Configuration config = getConfForNodeHealthScript();
config.addResource(healthScriptFile.getName());
String location = healthScriptFile.getAbsolutePath();
long timeout = config.getLong(HConstants.HEALTH_SCRIPT_TIMEOUT, 2000);
HealthChecker checker = new HealthChecker();
checker.init(location, timeout);
String normalScript = "echo \"I am all fine\"";
createScript(normalScript, true);
HealthReport report = checker.checkHealth();
LOG.info("Health Status:" + report.getHealthReport());
assertEquals(HealthCheckerExitStatus.SUCCESS, report.getStatus());
String errorScript = "echo ERROR\n echo \"Server not healthy\"";
createScript(errorScript, true);
report = checker.checkHealth();
LOG.info("Health Status:" + report.getHealthReport());
assertEquals(HealthCheckerExitStatus.FAILED, report.getStatus());
String timeOutScript = "sleep 4\n echo\"I am fine\"";
createScript(timeOutScript, true);
report = checker.checkHealth();
LOG.info("Health Status:" + report.getHealthReport());
assertEquals(HealthCheckerExitStatus.TIMED_OUT, report.getStatus());
this.healthScriptFile.delete();
}
@Test
public void testRSHealthChore() throws Exception{
Stoppable stop = new StoppableImplementation();
Configuration conf = getConfForNodeHealthScript();
String errorScript = "echo ERROR\n echo \"Server not healthy\"";
createScript(errorScript, true);
HealthCheckChore rsChore = new HealthCheckChore(100, stop, conf);
try {
//Default threshold is three.
rsChore.chore();
rsChore.chore();
assertFalse("Stoppable must not be stopped.", stop.isStopped());
rsChore.chore();
assertTrue("Stoppable must have been stopped.", stop.isStopped());
} finally {
stop.stop("Finished w/ test");
}
}
private void createScript(String scriptStr, boolean setExecutable)
throws Exception {
if (!this.healthScriptFile.exists()) {
if (!healthScriptFile.createNewFile()) {
throw new IOException("Failed create of " + this.healthScriptFile);
}
}
PrintWriter pw = new PrintWriter(new FileOutputStream(healthScriptFile));
try {
pw.println(scriptStr);
pw.flush();
} finally {
pw.close();
}
healthScriptFile.setExecutable(setExecutable);
LOG.info("Created " + this.healthScriptFile + ", executable=" + setExecutable);
}
private Configuration getConfForNodeHealthScript() throws IOException {
Configuration conf = UTIL.getConfiguration();
File tempDir = new File(UTIL.getDataTestDir().toString());
if (!tempDir.exists()) {
if (!tempDir.mkdirs()) {
throw new IOException("Failed mkdirs " + tempDir);
}
}
healthScriptFile = new File(tempDir.getAbsolutePath(), "HealthScript.sh");
conf.set(HConstants.HEALTH_SCRIPT_LOC, healthScriptFile.getAbsolutePath());
conf.setLong(HConstants.HEALTH_FAILURE_THRESHOLD, 3);
conf.setLong(HConstants.HEALTH_SCRIPT_TIMEOUT, 2000);
return conf;
}
/**
* Simple helper class that just keeps track of whether or not its stopped.
*/
private static class StoppableImplementation implements Stoppable {
private volatile boolean stop = false;
@Override
public void stop(String why) {
this.stop = true;
}
@Override
public boolean isStopped() {
return this.stop;
}
}
}