HBASE-24620 : Add a ClusterManager which submits command to ZooKeeper and its Agent which picks and execute those Commands (#2299)
Signed-off-by: Aman Poonia <apoonia@salesforce.com> Signed-off-by: Viraj Jasani <vjasani@apache.org>
This commit is contained in:
Lokesh Khurana
Viraj Jasani
parent
befa76f55a
commit
6eee9b1049
|
|
@ -0,0 +1,140 @@
|
||||||
|
#!/usr/bin/env bash
|
||||||
|
#
|
||||||
|
#/**
|
||||||
|
# * 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.
|
||||||
|
# */
|
||||||
|
#
|
||||||
|
|
||||||
|
usage="Usage: chaos-daemon.sh (start|stop) chaosagent"
|
||||||
|
|
||||||
|
# if no args specified, show usage
|
||||||
|
if [ $# -le 1 ]; then
|
||||||
|
echo "$usage"
|
||||||
|
exit 1
|
||||||
|
fi
|
||||||
|
|
||||||
|
# get arguments
|
||||||
|
startStop=$1
|
||||||
|
shift
|
||||||
|
|
||||||
|
command=$1
|
||||||
|
shift
|
||||||
|
|
||||||
|
check_before_start(){
|
||||||
|
#ckeck if the process is not running
|
||||||
|
mkdir -p "$HBASE_PID_DIR"
|
||||||
|
if [ -f "$CHAOS_PID" ]; then
|
||||||
|
if kill -0 "$(cat "$CHAOS_PID")" > /dev/null 2>&1; then
|
||||||
|
echo "$command" running as process "$(cat "$CHAOS_PID")". Stop it first.
|
||||||
|
exit 1
|
||||||
|
fi
|
||||||
|
fi
|
||||||
|
}
|
||||||
|
|
||||||
|
bin=`dirname "${BASH_SOURCE-$0}"`
|
||||||
|
bin=$(cd "$bin">/dev/null || exit; pwd)
|
||||||
|
|
||||||
|
. "$bin"/hbase-config.sh
|
||||||
|
. "$bin"/hbase-common.sh
|
||||||
|
|
||||||
|
CLASSPATH=$HBASE_CONF_DIR
|
||||||
|
for f in ../lib/*.jar; do
|
||||||
|
CLASSPATH=${CLASSPATH}:$f
|
||||||
|
done
|
||||||
|
|
||||||
|
# get log directory
|
||||||
|
if [ "$HBASE_LOG_DIR" = "" ]; then
|
||||||
|
export HBASE_LOG_DIR="$HBASE_HOME/logs"
|
||||||
|
fi
|
||||||
|
|
||||||
|
if [ "$HBASE_PID_DIR" = "" ]; then
|
||||||
|
HBASE_PID_DIR=/tmp
|
||||||
|
fi
|
||||||
|
|
||||||
|
if [ "$HBASE_IDENT_STRING" = "" ]; then
|
||||||
|
export HBASE_IDENT_STRING="$USER"
|
||||||
|
fi
|
||||||
|
|
||||||
|
if [ "$JAVA_HOME" != "" ]; then
|
||||||
|
#echo "run java in $JAVA_HOME"
|
||||||
|
JAVA_HOME=$JAVA_HOME
|
||||||
|
fi
|
||||||
|
if [ "$JAVA_HOME" = "" ]; then
|
||||||
|
echo "Error: JAVA_HOME is not set."
|
||||||
|
exit 1
|
||||||
|
fi
|
||||||
|
|
||||||
|
export HBASE_LOG_PREFIX=hbase-$HBASE_IDENT_STRING-$command-$HOSTNAME
|
||||||
|
export CHAOS_LOGFILE=$HBASE_LOG_PREFIX.log
|
||||||
|
|
||||||
|
if [ -z "${HBASE_ROOT_LOGGER}" ]; then
|
||||||
|
export HBASE_ROOT_LOGGER=${HBASE_ROOT_LOGGER:-"INFO,RFA"}
|
||||||
|
fi
|
||||||
|
|
||||||
|
if [ -z "${HBASE_SECURITY_LOGGER}" ]; then
|
||||||
|
export HBASE_SECURITY_LOGGER=${HBASE_SECURITY_LOGGER:-"INFO,RFAS"}
|
||||||
|
fi
|
||||||
|
|
||||||
|
CHAOS_LOGLOG=${CHAOS_LOGLOG:-"${HBASE_LOG_DIR}/${CHAOS_LOGFILE}"}
|
||||||
|
CHAOS_PID=$HBASE_PID_DIR/hbase-$HBASE_IDENT_STRING-$command.pid
|
||||||
|
|
||||||
|
if [ -z "$CHAOS_JAVA_OPTS" ]; then
|
||||||
|
CHAOS_JAVA_OPTS="-Xms1024m -Xmx4096m"
|
||||||
|
fi
|
||||||
|
|
||||||
|
case $startStop in
|
||||||
|
|
||||||
|
(start)
|
||||||
|
check_before_start
|
||||||
|
echo running $command
|
||||||
|
CMD="${JAVA_HOME}/bin/java -Dapp.home=${HBASE_CONF_DIR}/../ ${CHAOS_JAVA_OPTS} -cp ${CLASSPATH} org.apache.hadoop.hbase.chaos.ChaosService -$command start &>> ${CHAOS_LOGLOG} &"
|
||||||
|
|
||||||
|
eval $CMD
|
||||||
|
PID=$(echo $!)
|
||||||
|
echo ${PID} >${CHAOS_PID}
|
||||||
|
|
||||||
|
echo "Chaos ${1} process Started with ${PID} !"
|
||||||
|
now=$(date)
|
||||||
|
echo "${now} Chaos ${1} process Started with ${PID} !" >>${CHAOS_LOGLOG}
|
||||||
|
;;
|
||||||
|
|
||||||
|
(stop)
|
||||||
|
echo stopping $command
|
||||||
|
if [ -f $CHAOS_PID ]; then
|
||||||
|
pidToKill=`cat $CHAOS_PID`
|
||||||
|
# kill -0 == see if the PID exists
|
||||||
|
if kill -0 $pidToKill > /dev/null 2>&1; then
|
||||||
|
echo -n stopping $command
|
||||||
|
echo "`date` Terminating $command" >> $CHAOS_LOGLOG
|
||||||
|
kill $pidToKill > /dev/null 2>&1
|
||||||
|
waitForProcessEnd $pidToKill $command
|
||||||
|
else
|
||||||
|
retval=$?
|
||||||
|
echo no $command to stop because kill -0 of pid $pidToKill failed with status $retval
|
||||||
|
fi
|
||||||
|
else
|
||||||
|
echo no $command to stop because no pid file $CHAOS_PID
|
||||||
|
fi
|
||||||
|
rm -f $CHAOS_PID
|
||||||
|
;;
|
||||||
|
|
||||||
|
(*)
|
||||||
|
echo $usage
|
||||||
|
exit 1
|
||||||
|
;;
|
||||||
|
|
||||||
|
esac
|
||||||
Binary file not shown.
|
|
@ -0,0 +1,591 @@
|
||||||
|
/**
|
||||||
|
* 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.chaos;
|
||||||
|
|
||||||
|
import java.io.Closeable;
|
||||||
|
import java.io.File;
|
||||||
|
import java.io.IOException;
|
||||||
|
import java.util.ArrayList;
|
||||||
|
import java.util.List;
|
||||||
|
import java.util.Map;
|
||||||
|
import java.util.concurrent.atomic.AtomicBoolean;
|
||||||
|
import org.apache.hadoop.conf.Configuration;
|
||||||
|
import org.apache.hadoop.hbase.util.Pair;
|
||||||
|
import org.apache.hadoop.hbase.util.RetryCounter;
|
||||||
|
import org.apache.hadoop.hbase.util.RetryCounterFactory;
|
||||||
|
import org.apache.hadoop.util.Shell;
|
||||||
|
import org.apache.yetus.audience.InterfaceAudience;
|
||||||
|
import org.apache.zookeeper.AsyncCallback;
|
||||||
|
import org.apache.zookeeper.CreateMode;
|
||||||
|
import org.apache.zookeeper.KeeperException;
|
||||||
|
import org.apache.zookeeper.WatchedEvent;
|
||||||
|
import org.apache.zookeeper.Watcher;
|
||||||
|
import org.apache.zookeeper.ZooDefs;
|
||||||
|
import org.apache.zookeeper.ZooKeeper;
|
||||||
|
import org.apache.zookeeper.data.Stat;
|
||||||
|
import org.slf4j.Logger;
|
||||||
|
import org.slf4j.LoggerFactory;
|
||||||
|
|
||||||
|
/***
|
||||||
|
* An agent for executing destructive actions for ChaosMonkey.
|
||||||
|
* Uses ZooKeeper Watchers and LocalShell, to do the killing
|
||||||
|
* and getting status of service on targeted host without SSH.
|
||||||
|
* uses given ZNode Structure:
|
||||||
|
* /perfChaosTest (root)
|
||||||
|
* |
|
||||||
|
* |
|
||||||
|
* /chaosAgents (Used for registration has
|
||||||
|
* hostname ephemeral nodes as children)
|
||||||
|
* |
|
||||||
|
* |
|
||||||
|
* /chaosAgentTaskStatus (Used for task
|
||||||
|
* Execution, has hostname persistent
|
||||||
|
* nodes as child with tasks as their children)
|
||||||
|
* |
|
||||||
|
* |
|
||||||
|
* /hostname
|
||||||
|
* |
|
||||||
|
* |
|
||||||
|
* /task0000001 (command as data)
|
||||||
|
* (has two types of command :
|
||||||
|
* 1: starts with "exec"
|
||||||
|
* for executing a destructive action.
|
||||||
|
* 2: starts with "bool" for getting
|
||||||
|
* only status of service.
|
||||||
|
*
|
||||||
|
*/
|
||||||
|
@InterfaceAudience.Private
|
||||||
|
public class ChaosAgent implements Watcher, Closeable, Runnable {
|
||||||
|
|
||||||
|
private static final Logger LOG = LoggerFactory.getLogger(ChaosAgent.class);
|
||||||
|
static AtomicBoolean stopChaosAgent = new AtomicBoolean();
|
||||||
|
private ZooKeeper zk;
|
||||||
|
private String quorum;
|
||||||
|
private String agentName;
|
||||||
|
private Configuration conf;
|
||||||
|
private RetryCounterFactory retryCounterFactory;
|
||||||
|
private volatile boolean connected = false;
|
||||||
|
|
||||||
|
public ChaosAgent(Configuration conf, String quorum, String agentName) {
|
||||||
|
initChaosAgent(conf, quorum, agentName);
|
||||||
|
}
|
||||||
|
|
||||||
|
/***
|
||||||
|
* sets global params and initiates connection with ZooKeeper then does registration.
|
||||||
|
* @param conf initial configuration to use
|
||||||
|
* @param quorum ZK Quorum
|
||||||
|
* @param agentName AgentName to use
|
||||||
|
*/
|
||||||
|
private void initChaosAgent(Configuration conf, String quorum, String agentName) {
|
||||||
|
this.conf = conf;
|
||||||
|
this.quorum = quorum;
|
||||||
|
this.agentName = agentName;
|
||||||
|
this.retryCounterFactory = new RetryCounterFactory(new RetryCounter.RetryConfig()
|
||||||
|
.setMaxAttempts(conf.getInt(ChaosConstants.RETRY_ATTEMPTS_KEY,
|
||||||
|
ChaosConstants.DEFAULT_RETRY_ATTEMPTS)).setSleepInterval(
|
||||||
|
conf.getLong(ChaosConstants.RETRY_SLEEP_INTERVAL_KEY,
|
||||||
|
ChaosConstants.DEFAULT_RETRY_SLEEP_INTERVAL)));
|
||||||
|
try {
|
||||||
|
this.createZKConnection(null);
|
||||||
|
this.register();
|
||||||
|
} catch (IOException e) {
|
||||||
|
LOG.error("Error Creating Connection: " + e);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
/***
|
||||||
|
* Creates Connection with ZooKeeper.
|
||||||
|
* @throws IOException if something goes wrong
|
||||||
|
*/
|
||||||
|
private void createZKConnection(Watcher watcher) throws IOException {
|
||||||
|
if(watcher == null) {
|
||||||
|
zk = new ZooKeeper(quorum, ChaosConstants.SESSION_TIMEOUT_ZK, this);
|
||||||
|
} else {
|
||||||
|
zk = new ZooKeeper(quorum, ChaosConstants.SESSION_TIMEOUT_ZK, watcher);
|
||||||
|
}
|
||||||
|
LOG.info("ZooKeeper Connection created for ChaosAgent: " + agentName);
|
||||||
|
}
|
||||||
|
|
||||||
|
//WATCHERS: Below are the Watches used by ChaosAgent
|
||||||
|
|
||||||
|
/***
|
||||||
|
* Watcher for notifying if any task is assigned to agent or not,
|
||||||
|
* by seeking if any Node is being added to agent as Child.
|
||||||
|
*/
|
||||||
|
Watcher newTaskCreatedWatcher = new Watcher() {
|
||||||
|
@Override
|
||||||
|
public void process(WatchedEvent watchedEvent) {
|
||||||
|
if (watchedEvent.getType() == Event.EventType.NodeChildrenChanged) {
|
||||||
|
if (!(ChaosConstants.CHAOS_AGENT_STATUS_PERSISTENT_ZNODE +
|
||||||
|
ChaosConstants.ZNODE_PATH_SEPARATOR + agentName).equals(watchedEvent.getPath())) {
|
||||||
|
throw new RuntimeException(KeeperException.create(
|
||||||
|
KeeperException.Code.DATAINCONSISTENCY));
|
||||||
|
}
|
||||||
|
|
||||||
|
LOG.info("Change in Tasks Node, checking for Tasks again.");
|
||||||
|
getTasks();
|
||||||
|
}
|
||||||
|
|
||||||
|
}
|
||||||
|
};
|
||||||
|
|
||||||
|
//CALLBACKS: Below are the Callbacks used by Chaos Agent
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Callback used while setting status of a given task, Logs given status.
|
||||||
|
*/
|
||||||
|
AsyncCallback.StatCallback setStatusOfTaskZNodeCallback = (rc, path, ctx, stat) -> {
|
||||||
|
switch (KeeperException.Code.get(rc)) {
|
||||||
|
case CONNECTIONLOSS:
|
||||||
|
// Connection to the server was lost while setting status setting again.
|
||||||
|
try {
|
||||||
|
recreateZKConnection();
|
||||||
|
} catch (Exception e) {
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
setStatusOfTaskZNode(path, (String) ctx);
|
||||||
|
break;
|
||||||
|
|
||||||
|
case OK:
|
||||||
|
LOG.info("Status of Task has been set");
|
||||||
|
break;
|
||||||
|
|
||||||
|
case NONODE:
|
||||||
|
LOG.error("Chaos Agent status node does not exists: "
|
||||||
|
+ "check for ZNode directory structure again.");
|
||||||
|
break;
|
||||||
|
|
||||||
|
default:
|
||||||
|
LOG.error("Error while setting status of task ZNode: " +
|
||||||
|
path, KeeperException.create(KeeperException.Code.get(rc), path));
|
||||||
|
}
|
||||||
|
};
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Callback used while creating a Persistent ZNode tries to create
|
||||||
|
* ZNode again if Connection was lost in previous try.
|
||||||
|
*/
|
||||||
|
AsyncCallback.StringCallback createZNodeCallback = (rc, path, ctx, name) -> {
|
||||||
|
switch (KeeperException.Code.get(rc)) {
|
||||||
|
case CONNECTIONLOSS:
|
||||||
|
try {
|
||||||
|
recreateZKConnection();
|
||||||
|
} catch (Exception e) {
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
createZNode(path, (byte[]) ctx);
|
||||||
|
break;
|
||||||
|
case OK:
|
||||||
|
LOG.info("ZNode created : " + path);
|
||||||
|
break;
|
||||||
|
case NODEEXISTS:
|
||||||
|
LOG.warn("ZNode already registered: " + path);
|
||||||
|
break;
|
||||||
|
default:
|
||||||
|
LOG.error("Error occurred while creating Persistent ZNode: " + path,
|
||||||
|
KeeperException.create(KeeperException.Code.get(rc), path));
|
||||||
|
}
|
||||||
|
};
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Callback used while creating a Ephemeral ZNode tries to create ZNode again
|
||||||
|
* if Connection was lost in previous try.
|
||||||
|
*/
|
||||||
|
AsyncCallback.StringCallback createEphemeralZNodeCallback = (rc, path, ctx, name) -> {
|
||||||
|
switch (KeeperException.Code.get(rc)) {
|
||||||
|
case CONNECTIONLOSS:
|
||||||
|
try {
|
||||||
|
recreateZKConnection();
|
||||||
|
} catch (Exception e) {
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
createEphemeralZNode(path, (byte[]) ctx);
|
||||||
|
break;
|
||||||
|
case OK:
|
||||||
|
LOG.info("ZNode created : " + path);
|
||||||
|
break;
|
||||||
|
case NODEEXISTS:
|
||||||
|
LOG.warn("ZNode already registered: " + path);
|
||||||
|
break;
|
||||||
|
default:
|
||||||
|
LOG.error("Error occurred while creating Ephemeral ZNode: ",
|
||||||
|
KeeperException.create(KeeperException.Code.get(rc), path));
|
||||||
|
}
|
||||||
|
};
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Callback used by getTasksForAgentCallback while getting command,
|
||||||
|
* after getting command successfully, it executes command and
|
||||||
|
* set its status with respect to the command type.
|
||||||
|
*/
|
||||||
|
AsyncCallback.DataCallback getTaskForExecutionCallback = new AsyncCallback.DataCallback() {
|
||||||
|
@Override
|
||||||
|
public void processResult(int rc, String path, Object ctx, byte[] data, Stat stat) {
|
||||||
|
switch (KeeperException.Code.get(rc)) {
|
||||||
|
case CONNECTIONLOSS:
|
||||||
|
//Connection to the server has been lost while getting task, getting data again.
|
||||||
|
try {
|
||||||
|
recreateZKConnection();
|
||||||
|
} catch (Exception e) {
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
zk.getData(path,
|
||||||
|
false,
|
||||||
|
getTaskForExecutionCallback,
|
||||||
|
new String(data));
|
||||||
|
break;
|
||||||
|
case OK:
|
||||||
|
String cmd = new String(data);
|
||||||
|
LOG.info("Executing command : " + cmd);
|
||||||
|
String status = ChaosConstants.TASK_COMPLETION_STRING;
|
||||||
|
try {
|
||||||
|
String user = conf.get(ChaosConstants.CHAOSAGENT_SHELL_USER,
|
||||||
|
ChaosConstants.DEFAULT_SHELL_USER);
|
||||||
|
switch (cmd.substring(0, 4)) {
|
||||||
|
case "bool":
|
||||||
|
String ret = execWithRetries(user, cmd.substring(4)).getSecond();
|
||||||
|
status = Boolean.toString(ret.length() > 0);
|
||||||
|
break;
|
||||||
|
|
||||||
|
case "exec":
|
||||||
|
execWithRetries(user, cmd.substring(4));
|
||||||
|
break;
|
||||||
|
|
||||||
|
default:
|
||||||
|
LOG.error("Unknown Command Type");
|
||||||
|
status = ChaosConstants.TASK_ERROR_STRING;
|
||||||
|
}
|
||||||
|
} catch (IOException e) {
|
||||||
|
LOG.error("Got error while executing command : " + cmd +
|
||||||
|
" On agent : " + agentName + " Error : " + e);
|
||||||
|
status = ChaosConstants.TASK_ERROR_STRING;
|
||||||
|
}
|
||||||
|
|
||||||
|
try {
|
||||||
|
setStatusOfTaskZNode(path, status);
|
||||||
|
Thread.sleep(ChaosConstants.SET_STATUS_SLEEP_TIME);
|
||||||
|
} catch (InterruptedException e) {
|
||||||
|
LOG.error("Error occured after setting status: " + e);
|
||||||
|
}
|
||||||
|
|
||||||
|
default:
|
||||||
|
LOG.error("Error occurred while getting data",
|
||||||
|
KeeperException.create(KeeperException.Code.get(rc), path));
|
||||||
|
}
|
||||||
|
}
|
||||||
|
};
|
||||||
|
|
||||||
|
/***
|
||||||
|
* Callback used while getting Tasks for agent if call executed without Exception,
|
||||||
|
* It creates a separate thread for each children to execute given Tasks parallely.
|
||||||
|
*/
|
||||||
|
AsyncCallback.ChildrenCallback getTasksForAgentCallback = new AsyncCallback.ChildrenCallback() {
|
||||||
|
@Override
|
||||||
|
public void processResult(int rc, String path, Object ctx, List<String> children) {
|
||||||
|
switch (KeeperException.Code.get(rc)) {
|
||||||
|
case CONNECTIONLOSS: {
|
||||||
|
// Connection to the server has been lost, getting tasks again.
|
||||||
|
try {
|
||||||
|
recreateZKConnection();
|
||||||
|
} catch (Exception e) {
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
getTasks();
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
|
||||||
|
case OK: {
|
||||||
|
if (children != null) {
|
||||||
|
try {
|
||||||
|
|
||||||
|
LOG.info("Executing each task as a separate thread");
|
||||||
|
List<Thread> tasksList = new ArrayList<>();
|
||||||
|
for (String task : children) {
|
||||||
|
String threadName = agentName + "_" + task;
|
||||||
|
Thread t = new Thread(() -> {
|
||||||
|
|
||||||
|
LOG.info("Executing task : " + task + " of agent : " + agentName);
|
||||||
|
zk.getData(ChaosConstants.CHAOS_AGENT_STATUS_PERSISTENT_ZNODE +
|
||||||
|
ChaosConstants.ZNODE_PATH_SEPARATOR + agentName +
|
||||||
|
ChaosConstants.ZNODE_PATH_SEPARATOR + task,
|
||||||
|
false,
|
||||||
|
getTaskForExecutionCallback,
|
||||||
|
task);
|
||||||
|
|
||||||
|
});
|
||||||
|
t.setName(threadName);
|
||||||
|
t.start();
|
||||||
|
tasksList.add(t);
|
||||||
|
|
||||||
|
for (Thread thread : tasksList) {
|
||||||
|
thread.join();
|
||||||
|
}
|
||||||
|
}
|
||||||
|
} catch (InterruptedException e) {
|
||||||
|
LOG.error("Error scheduling next task : " +
|
||||||
|
" for agent : " + agentName + " Error : " + e);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
|
||||||
|
default:
|
||||||
|
LOG.error("Error occurred while getting task",
|
||||||
|
KeeperException.create(KeeperException.Code.get(rc), path));
|
||||||
|
}
|
||||||
|
}
|
||||||
|
};
|
||||||
|
|
||||||
|
/***
|
||||||
|
* Function to create PERSISTENT ZNODE with given path and data given as params
|
||||||
|
* @param path Path at which ZNode to create
|
||||||
|
* @param data Data to put under ZNode
|
||||||
|
*/
|
||||||
|
public void createZNode(String path, byte[] data) {
|
||||||
|
zk.create(path,
|
||||||
|
data,
|
||||||
|
ZooDefs.Ids.OPEN_ACL_UNSAFE,
|
||||||
|
CreateMode.PERSISTENT,
|
||||||
|
createZNodeCallback,
|
||||||
|
data);
|
||||||
|
}
|
||||||
|
|
||||||
|
/***
|
||||||
|
* Function to create EPHEMERAL ZNODE with given path and data as params.
|
||||||
|
* @param path Path at which Ephemeral ZNode to create
|
||||||
|
* @param data Data to put under ZNode
|
||||||
|
*/
|
||||||
|
public void createEphemeralZNode(String path, byte[] data) {
|
||||||
|
zk.create(path,
|
||||||
|
data,
|
||||||
|
ZooDefs.Ids.OPEN_ACL_UNSAFE,
|
||||||
|
CreateMode.EPHEMERAL,
|
||||||
|
createEphemeralZNodeCallback,
|
||||||
|
data);
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Checks if given ZNode exists, if not creates a PERSISTENT ZNODE for same.
|
||||||
|
*
|
||||||
|
* @param path Path to check for ZNode
|
||||||
|
*/
|
||||||
|
private void createIfZNodeNotExists(String path) {
|
||||||
|
try {
|
||||||
|
if (zk.exists(path,
|
||||||
|
false) == null) {
|
||||||
|
createZNode(path, new byte[0]);
|
||||||
|
}
|
||||||
|
} catch (KeeperException | InterruptedException e) {
|
||||||
|
LOG.error("Error checking given node : " + path + " " + e);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* sets given Status for Task Znode
|
||||||
|
*
|
||||||
|
* @param taskZNode ZNode to set status
|
||||||
|
* @param status Status value
|
||||||
|
*/
|
||||||
|
public void setStatusOfTaskZNode(String taskZNode, String status) {
|
||||||
|
LOG.info("Setting status of Task ZNode: " + taskZNode + " status : " + status);
|
||||||
|
zk.setData(taskZNode,
|
||||||
|
status.getBytes(),
|
||||||
|
-1,
|
||||||
|
setStatusOfTaskZNodeCallback,
|
||||||
|
null);
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* registration of ChaosAgent by checking and creating necessary ZNodes.
|
||||||
|
*/
|
||||||
|
private void register() {
|
||||||
|
createIfZNodeNotExists(ChaosConstants.CHAOS_TEST_ROOT_ZNODE);
|
||||||
|
createIfZNodeNotExists(ChaosConstants.CHAOS_AGENT_REGISTRATION_EPIMERAL_ZNODE);
|
||||||
|
createIfZNodeNotExists(ChaosConstants.CHAOS_AGENT_STATUS_PERSISTENT_ZNODE);
|
||||||
|
createIfZNodeNotExists(ChaosConstants.CHAOS_AGENT_STATUS_PERSISTENT_ZNODE +
|
||||||
|
ChaosConstants.ZNODE_PATH_SEPARATOR + agentName);
|
||||||
|
|
||||||
|
createEphemeralZNode(ChaosConstants.CHAOS_AGENT_REGISTRATION_EPIMERAL_ZNODE +
|
||||||
|
ChaosConstants.ZNODE_PATH_SEPARATOR + agentName, new byte[0]);
|
||||||
|
}
|
||||||
|
|
||||||
|
/***
|
||||||
|
* Gets tasks for execution, basically sets Watch on it's respective host's Znode and
|
||||||
|
* waits for tasks to be assigned, also has a getTasksForAgentCallback
|
||||||
|
* which handles execution of task.
|
||||||
|
*/
|
||||||
|
private void getTasks() {
|
||||||
|
LOG.info("Getting Tasks for Agent: " + agentName + "and setting watch for new Tasks");
|
||||||
|
zk.getChildren(ChaosConstants.CHAOS_AGENT_STATUS_PERSISTENT_ZNODE +
|
||||||
|
ChaosConstants.ZNODE_PATH_SEPARATOR + agentName,
|
||||||
|
newTaskCreatedWatcher,
|
||||||
|
getTasksForAgentCallback,
|
||||||
|
null);
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Below function executes command with retries with given user.
|
||||||
|
* Uses LocalShell to execute a command.
|
||||||
|
*
|
||||||
|
* @param user user name, default none
|
||||||
|
* @param cmd Command to execute
|
||||||
|
* @return A pair of Exit Code and Shell output
|
||||||
|
* @throws IOException Exception while executing shell command
|
||||||
|
*/
|
||||||
|
private Pair<Integer, String> execWithRetries(String user, String cmd) throws IOException {
|
||||||
|
RetryCounter retryCounter = retryCounterFactory.create();
|
||||||
|
while (true) {
|
||||||
|
try {
|
||||||
|
return exec(user, cmd);
|
||||||
|
} catch (IOException e) {
|
||||||
|
retryOrThrow(retryCounter, e, user, cmd);
|
||||||
|
}
|
||||||
|
try {
|
||||||
|
retryCounter.sleepUntilNextRetry();
|
||||||
|
} catch (InterruptedException e) {
|
||||||
|
LOG.warn("Sleep Interrupted: " + e);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
private Pair<Integer, String> exec(String user, String cmd) throws IOException {
|
||||||
|
LOG.info("Executing Shell command: " + cmd + " , user: " + user);
|
||||||
|
|
||||||
|
LocalShell shell = new LocalShell(user, cmd);
|
||||||
|
try {
|
||||||
|
shell.execute();
|
||||||
|
} catch (Shell.ExitCodeException e) {
|
||||||
|
String output = shell.getOutput();
|
||||||
|
throw new Shell.ExitCodeException(e.getExitCode(), "stderr: " + e.getMessage()
|
||||||
|
+ ", stdout: " + output);
|
||||||
|
}
|
||||||
|
LOG.info("Executed Shell command, exit code: {}, output n{}", shell.getExitCode(), shell.getOutput());
|
||||||
|
|
||||||
|
return new Pair<>(shell.getExitCode(), shell.getOutput());
|
||||||
|
}
|
||||||
|
|
||||||
|
private <E extends Exception> void retryOrThrow(RetryCounter retryCounter, E ex,
|
||||||
|
String user, String cmd) throws E {
|
||||||
|
if (retryCounter.shouldRetry()) {
|
||||||
|
LOG.warn("Local command: {}, user: {}, failed at attempt {}. Retrying until maxAttempts: {}."
|
||||||
|
+ "Exception {}", cmd, user,retryCounter.getAttemptTimes(), retryCounter.getMaxAttempts(),
|
||||||
|
ex.getMessage());
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
throw ex;
|
||||||
|
}
|
||||||
|
|
||||||
|
private boolean isConnected() {
|
||||||
|
return connected;
|
||||||
|
}
|
||||||
|
|
||||||
|
@Override
|
||||||
|
public void close() throws IOException {
|
||||||
|
LOG.info("Closing ZooKeeper Connection for Chaos Agent : " + agentName);
|
||||||
|
try {
|
||||||
|
zk.close();
|
||||||
|
} catch (InterruptedException e) {
|
||||||
|
LOG.error("Error while closing ZooKeeper Connection.");
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
@Override
|
||||||
|
public void run() {
|
||||||
|
try {
|
||||||
|
LOG.info("Running Chaos Agent on : " + agentName);
|
||||||
|
while (!this.isConnected()) {
|
||||||
|
Thread.sleep(100);
|
||||||
|
}
|
||||||
|
this.getTasks();
|
||||||
|
while (!stopChaosAgent.get()) {
|
||||||
|
Thread.sleep(500);
|
||||||
|
}
|
||||||
|
} catch (InterruptedException e) {
|
||||||
|
LOG.error("Error while running Chaos Agent", e);
|
||||||
|
}
|
||||||
|
|
||||||
|
}
|
||||||
|
|
||||||
|
@Override
|
||||||
|
public void process(WatchedEvent watchedEvent) {
|
||||||
|
LOG.info("Processing event: " + watchedEvent.toString());
|
||||||
|
if (watchedEvent.getType() == Event.EventType.None) {
|
||||||
|
switch (watchedEvent.getState()) {
|
||||||
|
case SyncConnected:
|
||||||
|
connected = true;
|
||||||
|
break;
|
||||||
|
case Disconnected:
|
||||||
|
connected = false;
|
||||||
|
break;
|
||||||
|
case Expired:
|
||||||
|
connected = false;
|
||||||
|
LOG.error("Session expired creating again");
|
||||||
|
try {
|
||||||
|
createZKConnection(null);
|
||||||
|
} catch (IOException e) {
|
||||||
|
LOG.error("Error creating Zookeeper connection", e);
|
||||||
|
}
|
||||||
|
default:
|
||||||
|
LOG.error("Unknown State");
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
private void recreateZKConnection() throws Exception{
|
||||||
|
try {
|
||||||
|
zk.close();
|
||||||
|
createZKConnection(newTaskCreatedWatcher);
|
||||||
|
createEphemeralZNode(ChaosConstants.CHAOS_AGENT_REGISTRATION_EPIMERAL_ZNODE +
|
||||||
|
ChaosConstants.ZNODE_PATH_SEPARATOR + agentName, new byte[0]);
|
||||||
|
} catch (IOException e) {
|
||||||
|
LOG.error("Error creating new ZK COnnection for agent: {}", agentName + e);
|
||||||
|
throw e;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Executes Command locally.
|
||||||
|
*/
|
||||||
|
protected static class LocalShell extends Shell.ShellCommandExecutor {
|
||||||
|
|
||||||
|
private String user;
|
||||||
|
private String execCommand;
|
||||||
|
|
||||||
|
public LocalShell(String user, String execCommand) {
|
||||||
|
super(new String[]{execCommand});
|
||||||
|
this.user = user;
|
||||||
|
this.execCommand = execCommand;
|
||||||
|
}
|
||||||
|
|
||||||
|
@Override
|
||||||
|
public String[] getExecString() {
|
||||||
|
// TODO: Considering Agent is running with same user.
|
||||||
|
if(!user.equals(ChaosConstants.DEFAULT_SHELL_USER)){
|
||||||
|
execCommand = String.format("su -u %1$s %2$s", user, execCommand);
|
||||||
|
}
|
||||||
|
return new String[]{"/usr/bin/env", "bash", "-c", execCommand};
|
||||||
|
}
|
||||||
|
|
||||||
|
@Override
|
||||||
|
public void execute() throws IOException {
|
||||||
|
super.execute();
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
@ -0,0 +1,77 @@
|
||||||
|
/**
|
||||||
|
* 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.chaos;
|
||||||
|
|
||||||
|
import org.apache.yetus.audience.InterfaceAudience;
|
||||||
|
|
||||||
|
/***
|
||||||
|
* ChaosConstant holds a bunch of Choas-related Constants
|
||||||
|
*/
|
||||||
|
@InterfaceAudience.Public
|
||||||
|
public final class ChaosConstants {
|
||||||
|
|
||||||
|
/*Base ZNode for whole Chaos Testing*/
|
||||||
|
public static final String CHAOS_TEST_ROOT_ZNODE = "/hbase";
|
||||||
|
|
||||||
|
/*Just a / used for path separator*/
|
||||||
|
public static final String ZNODE_PATH_SEPARATOR = "/";
|
||||||
|
|
||||||
|
/*ZNode used for ChaosAgents registration.*/
|
||||||
|
public static final String CHAOS_AGENT_REGISTRATION_EPIMERAL_ZNODE =
|
||||||
|
CHAOS_TEST_ROOT_ZNODE + ZNODE_PATH_SEPARATOR + "chaosAgents";
|
||||||
|
|
||||||
|
/*ZNode used for getting status of tasks assigned*/
|
||||||
|
public static final String CHAOS_AGENT_STATUS_PERSISTENT_ZNODE =
|
||||||
|
CHAOS_TEST_ROOT_ZNODE + ZNODE_PATH_SEPARATOR + "chaosAgentTaskStatus";
|
||||||
|
|
||||||
|
/*Config property for getting number of retries to execute a command*/
|
||||||
|
public static final String RETRY_ATTEMPTS_KEY = "hbase.it.clustermanager.retry.attempts";
|
||||||
|
|
||||||
|
/*Default value for number of retries*/
|
||||||
|
public static final int DEFAULT_RETRY_ATTEMPTS = 5;
|
||||||
|
|
||||||
|
/*Config property to sleep in between retries*/
|
||||||
|
public static final String RETRY_SLEEP_INTERVAL_KEY =
|
||||||
|
"hbase.it.clustermanager.retry.sleep.interval";
|
||||||
|
|
||||||
|
/*Default Sleep time between each retry*/
|
||||||
|
public static final int DEFAULT_RETRY_SLEEP_INTERVAL = 5000;
|
||||||
|
|
||||||
|
/*Config property for executing command as specific user*/
|
||||||
|
public static final String CHAOSAGENT_SHELL_USER = "hbase.it.clustermanager.ssh.user";
|
||||||
|
|
||||||
|
/*default user for executing local commands*/
|
||||||
|
public static final String DEFAULT_SHELL_USER = "";
|
||||||
|
|
||||||
|
/*timeout used while creating ZooKeeper connection*/
|
||||||
|
public static final int SESSION_TIMEOUT_ZK = 60000 * 10;
|
||||||
|
|
||||||
|
/*Time given to ChaosAgent to set status*/
|
||||||
|
public static final int SET_STATUS_SLEEP_TIME = 30 * 1000;
|
||||||
|
|
||||||
|
/*Status String when you get an ERROR while executing task*/
|
||||||
|
public static final String TASK_ERROR_STRING = "error";
|
||||||
|
|
||||||
|
/*Status String when your command gets executed correctly*/
|
||||||
|
public static final String TASK_COMPLETION_STRING = "done";
|
||||||
|
|
||||||
|
/*Name of ChoreService to use*/
|
||||||
|
public static final String CHORE_SERVICE_PREFIX = "ChaosService";
|
||||||
|
|
||||||
|
}
|
||||||
|
|
@ -0,0 +1,138 @@
|
||||||
|
/**
|
||||||
|
* 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.chaos;
|
||||||
|
|
||||||
|
import java.net.UnknownHostException;
|
||||||
|
import java.util.Arrays;
|
||||||
|
import java.util.Collection;
|
||||||
|
|
||||||
|
import org.apache.hadoop.conf.Configuration;
|
||||||
|
import org.apache.hadoop.hbase.AuthUtil;
|
||||||
|
import org.apache.hadoop.hbase.ChoreService;
|
||||||
|
import org.apache.hadoop.hbase.HBaseConfiguration;
|
||||||
|
import org.apache.hadoop.hbase.ScheduledChore;
|
||||||
|
import org.apache.hadoop.util.GenericOptionsParser;
|
||||||
|
import org.apache.yetus.audience.InterfaceAudience;
|
||||||
|
import org.slf4j.Logger;
|
||||||
|
import org.slf4j.LoggerFactory;
|
||||||
|
|
||||||
|
import org.apache.hbase.thirdparty.org.apache.commons.cli.CommandLine;
|
||||||
|
import org.apache.hbase.thirdparty.org.apache.commons.cli.GnuParser;
|
||||||
|
import org.apache.hbase.thirdparty.org.apache.commons.cli.Option;
|
||||||
|
import org.apache.hbase.thirdparty.org.apache.commons.cli.Options;
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Class used to start/stop Chaos related services (currently chaosagent)
|
||||||
|
*/
|
||||||
|
@InterfaceAudience.Private
|
||||||
|
public class ChaosService {
|
||||||
|
|
||||||
|
private static final Logger LOG = LoggerFactory.getLogger(ChaosService.class.getName());
|
||||||
|
|
||||||
|
public static void execute(String[] args, Configuration conf) {
|
||||||
|
LOG.info("arguments : " + Arrays.toString(args));
|
||||||
|
|
||||||
|
try {
|
||||||
|
CommandLine cmdline = new GnuParser().parse(getOptions(), args);
|
||||||
|
if (cmdline.hasOption(ChaosServiceName.CHAOSAGENT.toString().toLowerCase())) {
|
||||||
|
String actionStr = cmdline.getOptionValue(ChaosServiceName.CHAOSAGENT.toString().toLowerCase());
|
||||||
|
try {
|
||||||
|
ExecutorAction action = ExecutorAction.valueOf(actionStr.toUpperCase());
|
||||||
|
if (action == ExecutorAction.START) {
|
||||||
|
ChaosServiceStart(conf, ChaosServiceName.CHAOSAGENT);
|
||||||
|
} else if (action == ExecutorAction.STOP) {
|
||||||
|
ChaosServiceStop();
|
||||||
|
}
|
||||||
|
} catch (IllegalArgumentException e) {
|
||||||
|
LOG.error("action passed: {} Unexpected action. Please provide only start/stop.",
|
||||||
|
actionStr, e);
|
||||||
|
throw new RuntimeException(e);
|
||||||
|
}
|
||||||
|
} else {
|
||||||
|
LOG.error("Invalid Options");
|
||||||
|
}
|
||||||
|
} catch (Exception e) {
|
||||||
|
LOG.error("Error while starting ChaosService : ", e);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
private static void ChaosServiceStart(Configuration conf, ChaosServiceName serviceName) {
|
||||||
|
switch (serviceName) {
|
||||||
|
case CHAOSAGENT:
|
||||||
|
ChaosAgent.stopChaosAgent.set(false);
|
||||||
|
try {
|
||||||
|
Thread t = new Thread(new ChaosAgent(conf,
|
||||||
|
ChaosUtils.getZKQuorum(conf), ChaosUtils.getHostName()));
|
||||||
|
t.start();
|
||||||
|
t.join();
|
||||||
|
} catch (InterruptedException | UnknownHostException e) {
|
||||||
|
LOG.error("Failed while executing next task execution of ChaosAgent on : {}",
|
||||||
|
serviceName, e);
|
||||||
|
}
|
||||||
|
break;
|
||||||
|
default:
|
||||||
|
LOG.error("Service Name not known : " + serviceName.toString());
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
private static void ChaosServiceStop() {
|
||||||
|
ChaosAgent.stopChaosAgent.set(true);
|
||||||
|
}
|
||||||
|
|
||||||
|
private static Options getOptions() {
|
||||||
|
Options options = new Options();
|
||||||
|
options.addOption(new Option("c", ChaosServiceName.CHAOSAGENT.toString().toLowerCase(),
|
||||||
|
true, "expecting a start/stop argument"));
|
||||||
|
options.addOption(new Option("D", ChaosServiceName.GENERIC.toString(),
|
||||||
|
true, "generic D param"));
|
||||||
|
LOG.info(Arrays.toString(new Collection[] { options.getOptions() }));
|
||||||
|
return options;
|
||||||
|
}
|
||||||
|
|
||||||
|
public static void main(String[] args) throws Exception {
|
||||||
|
Configuration conf = HBaseConfiguration.create();
|
||||||
|
new GenericOptionsParser(conf, args);
|
||||||
|
|
||||||
|
ChoreService choreChaosService = null;
|
||||||
|
ScheduledChore authChore = AuthUtil.getAuthChore(conf);
|
||||||
|
|
||||||
|
try {
|
||||||
|
if (authChore != null) {
|
||||||
|
choreChaosService = new ChoreService(ChaosConstants.CHORE_SERVICE_PREFIX);
|
||||||
|
choreChaosService.scheduleChore(authChore);
|
||||||
|
}
|
||||||
|
|
||||||
|
execute(args, conf);
|
||||||
|
} finally {
|
||||||
|
if (authChore != null)
|
||||||
|
choreChaosService.shutdown();
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
enum ChaosServiceName {
|
||||||
|
CHAOSAGENT,
|
||||||
|
GENERIC
|
||||||
|
}
|
||||||
|
|
||||||
|
|
||||||
|
enum ExecutorAction {
|
||||||
|
START,
|
||||||
|
STOP
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
@ -0,0 +1,49 @@
|
||||||
|
/**
|
||||||
|
* 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.chaos;
|
||||||
|
|
||||||
|
import java.net.InetAddress;
|
||||||
|
import java.net.UnknownHostException;
|
||||||
|
|
||||||
|
import org.apache.hadoop.conf.Configuration;
|
||||||
|
import org.apache.hadoop.hbase.HConstants;
|
||||||
|
import org.apache.yetus.audience.InterfaceAudience;
|
||||||
|
|
||||||
|
/**
|
||||||
|
* ChaosUtils holds a bunch of useful functions like getting hostname and getting ZooKeeper quorum.
|
||||||
|
*/
|
||||||
|
@InterfaceAudience.Private
|
||||||
|
public class ChaosUtils {
|
||||||
|
|
||||||
|
public static String getHostName() throws UnknownHostException {
|
||||||
|
return InetAddress.getLocalHost().getHostName();
|
||||||
|
}
|
||||||
|
|
||||||
|
|
||||||
|
public static String getZKQuorum(Configuration conf) {
|
||||||
|
String port =
|
||||||
|
Integer.toString(conf.getInt(HConstants.ZOOKEEPER_CLIENT_PORT, 2181));
|
||||||
|
String[] serverHosts = conf.getStrings(HConstants.ZOOKEEPER_QUORUM, "localhost");
|
||||||
|
for (int i = 0; i < serverHosts.length; i++) {
|
||||||
|
serverHosts[i] = serverHosts[i] + ":" + port;
|
||||||
|
}
|
||||||
|
return String.join(",", serverHosts);
|
||||||
|
}
|
||||||
|
|
||||||
|
}
|
||||||
|
|
@ -0,0 +1,332 @@
|
||||||
|
/**
|
||||||
|
* 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 java.io.IOException;
|
||||||
|
|
||||||
|
import org.apache.hadoop.hbase.util.Threads;
|
||||||
|
import org.apache.yetus.audience.InterfaceAudience;
|
||||||
|
import org.apache.zookeeper.AsyncCallback;
|
||||||
|
import org.apache.zookeeper.CreateMode;
|
||||||
|
import org.apache.zookeeper.KeeperException;
|
||||||
|
import org.apache.zookeeper.WatchedEvent;
|
||||||
|
import org.apache.zookeeper.Watcher;
|
||||||
|
import org.apache.zookeeper.ZooDefs;
|
||||||
|
import org.apache.zookeeper.ZooKeeper;
|
||||||
|
import org.apache.zookeeper.data.Stat;
|
||||||
|
import org.slf4j.Logger;
|
||||||
|
import org.slf4j.LoggerFactory;
|
||||||
|
|
||||||
|
@InterfaceAudience.Private
|
||||||
|
public class ChaosZKClient {
|
||||||
|
|
||||||
|
private static final Logger LOG = LoggerFactory.getLogger(ChaosZKClient.class.getName());
|
||||||
|
private static final String CHAOS_AGENT_PARENT_ZNODE = "/hbase/chaosAgents";
|
||||||
|
private static final String CHAOS_AGENT_STATUS_ZNODE = "/hbase/chaosAgentTaskStatus";
|
||||||
|
private static final String ZNODE_PATH_SEPARATOR = "/";
|
||||||
|
private static final String TASK_PREFIX = "task_";
|
||||||
|
private static final String TASK_ERROR_STRING = "error";
|
||||||
|
private static final String TASK_COMPLETION_STRING = "done";
|
||||||
|
private static final String TASK_BOOLEAN_TRUE = "true";
|
||||||
|
private static final String TASK_BOOLEAN_FALSE = "false";
|
||||||
|
private static final String CONNECTION_LOSS = "ConnectionLoss";
|
||||||
|
private static final int SESSION_TIMEOUT_ZK = 10 * 60 * 1000;
|
||||||
|
private static final int TASK_EXECUTION_TIMEOUT = 5 * 60 * 1000;
|
||||||
|
private volatile String taskStatus = null;
|
||||||
|
|
||||||
|
private final String quorum;
|
||||||
|
private ZooKeeper zk;
|
||||||
|
|
||||||
|
public ChaosZKClient(String quorum) {
|
||||||
|
this.quorum = quorum;
|
||||||
|
try {
|
||||||
|
this.createNewZKConnection();
|
||||||
|
} catch (IOException e) {
|
||||||
|
LOG.error("Error creating ZooKeeper Connection: ", e);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Creates connection with ZooKeeper
|
||||||
|
* @throws IOException when not able to create connection properly
|
||||||
|
*/
|
||||||
|
public void createNewZKConnection() throws IOException {
|
||||||
|
Watcher watcher = new Watcher() {
|
||||||
|
@Override
|
||||||
|
public void process(WatchedEvent watchedEvent) {
|
||||||
|
LOG.info("Created ZooKeeper Connection For executing task");
|
||||||
|
}
|
||||||
|
};
|
||||||
|
|
||||||
|
this.zk = new ZooKeeper(quorum, SESSION_TIMEOUT_ZK, watcher);
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Checks if ChaosAgent is running or not on target host by checking its ZNode.
|
||||||
|
* @param hostname hostname to check for chaosagent
|
||||||
|
* @return true/false whether agent is running or not
|
||||||
|
*/
|
||||||
|
private boolean isChaosAgentRunning(String hostname) {
|
||||||
|
try {
|
||||||
|
return zk.exists(CHAOS_AGENT_PARENT_ZNODE + ZNODE_PATH_SEPARATOR + hostname,
|
||||||
|
false) != null;
|
||||||
|
} catch (KeeperException e) {
|
||||||
|
if (e.toString().contains(CONNECTION_LOSS)) {
|
||||||
|
recreateZKConnection();
|
||||||
|
try {
|
||||||
|
return zk.exists(CHAOS_AGENT_PARENT_ZNODE + ZNODE_PATH_SEPARATOR + hostname,
|
||||||
|
false) != null;
|
||||||
|
} catch (KeeperException | InterruptedException ie) {
|
||||||
|
LOG.error("ERROR ", ie);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
} catch (InterruptedException e) {
|
||||||
|
LOG.error("Error checking for given hostname: {} ERROR: ", hostname, e);
|
||||||
|
}
|
||||||
|
return false;
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Creates tasks for target hosts by creating ZNodes.
|
||||||
|
* Waits for a limited amount of time to complete task to execute.
|
||||||
|
* @param taskObject Object data represents command
|
||||||
|
* @return returns status
|
||||||
|
*/
|
||||||
|
public String submitTask(final TaskObject taskObject) {
|
||||||
|
if (isChaosAgentRunning(taskObject.getTaskHostname())) {
|
||||||
|
LOG.info("Creating task node");
|
||||||
|
zk.create(CHAOS_AGENT_STATUS_ZNODE + ZNODE_PATH_SEPARATOR +
|
||||||
|
taskObject.getTaskHostname() + ZNODE_PATH_SEPARATOR + TASK_PREFIX,
|
||||||
|
taskObject.getCommand().getBytes(),
|
||||||
|
ZooDefs.Ids.OPEN_ACL_UNSAFE,
|
||||||
|
CreateMode.EPHEMERAL_SEQUENTIAL,
|
||||||
|
submitTaskCallback,
|
||||||
|
taskObject);
|
||||||
|
long start = System.currentTimeMillis();
|
||||||
|
|
||||||
|
while ((System.currentTimeMillis() - start) < TASK_EXECUTION_TIMEOUT) {
|
||||||
|
if(taskStatus != null) {
|
||||||
|
return taskStatus;
|
||||||
|
}
|
||||||
|
Threads.sleep(500);
|
||||||
|
}
|
||||||
|
} else {
|
||||||
|
LOG.info("EHHHHH! ChaosAgent Not running");
|
||||||
|
}
|
||||||
|
return TASK_ERROR_STRING;
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* To get status of task submitted
|
||||||
|
* @param path path at which to get status
|
||||||
|
* @param ctx path context
|
||||||
|
*/
|
||||||
|
private void getStatus(String path , Object ctx) {
|
||||||
|
LOG.info("Getting Status of task: " + path);
|
||||||
|
zk.getData(path,
|
||||||
|
false,
|
||||||
|
getStatusCallback,
|
||||||
|
ctx);
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Set a watch on task submitted
|
||||||
|
* @param name ZNode name to set a watch
|
||||||
|
* @param taskObject context for ZNode name
|
||||||
|
*/
|
||||||
|
private void setStatusWatch(String name, TaskObject taskObject) {
|
||||||
|
LOG.info("Checking for ZNode and Setting watch for task : " + name);
|
||||||
|
zk.exists(name,
|
||||||
|
setStatusWatcher,
|
||||||
|
setStatusWatchCallback,
|
||||||
|
taskObject);
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Delete task after getting its status
|
||||||
|
* @param path path to delete ZNode
|
||||||
|
*/
|
||||||
|
private void deleteTask(String path) {
|
||||||
|
LOG.info("Deleting task: " + path);
|
||||||
|
zk.delete(path,
|
||||||
|
-1,
|
||||||
|
taskDeleteCallback,
|
||||||
|
null);
|
||||||
|
}
|
||||||
|
|
||||||
|
//WATCHERS:
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Watcher to get notification whenever status of task changes.
|
||||||
|
*/
|
||||||
|
Watcher setStatusWatcher = new Watcher() {
|
||||||
|
@Override
|
||||||
|
public void process(WatchedEvent watchedEvent) {
|
||||||
|
LOG.info("Setting status watch for task: " + watchedEvent.getPath());
|
||||||
|
if(watchedEvent.getType() == Event.EventType.NodeDataChanged) {
|
||||||
|
if(!watchedEvent.getPath().contains(TASK_PREFIX)) {
|
||||||
|
throw new RuntimeException(KeeperException.create(
|
||||||
|
KeeperException.Code.DATAINCONSISTENCY));
|
||||||
|
}
|
||||||
|
getStatus(watchedEvent.getPath(), (Object) watchedEvent.getPath());
|
||||||
|
|
||||||
|
}
|
||||||
|
}
|
||||||
|
};
|
||||||
|
|
||||||
|
//CALLBACKS
|
||||||
|
|
||||||
|
AsyncCallback.DataCallback getStatusCallback = (rc, path, ctx, data, stat) -> {
|
||||||
|
switch (KeeperException.Code.get(rc)) {
|
||||||
|
case CONNECTIONLOSS:
|
||||||
|
//Connectionloss while getting status of task, getting again
|
||||||
|
recreateZKConnection();
|
||||||
|
getStatus(path, ctx);
|
||||||
|
break;
|
||||||
|
|
||||||
|
case OK:
|
||||||
|
if (ctx!=null) {
|
||||||
|
|
||||||
|
String status = new String(data);
|
||||||
|
taskStatus = status;
|
||||||
|
switch (status) {
|
||||||
|
case TASK_COMPLETION_STRING:
|
||||||
|
case TASK_BOOLEAN_TRUE:
|
||||||
|
case TASK_BOOLEAN_FALSE:
|
||||||
|
LOG.info("Task executed completely : Status --> " + status);
|
||||||
|
break;
|
||||||
|
|
||||||
|
case TASK_ERROR_STRING:
|
||||||
|
LOG.info("There was error while executing task : Status --> " + status);
|
||||||
|
break;
|
||||||
|
|
||||||
|
default:
|
||||||
|
LOG.warn("Status of task is undefined!! : Status --> " + status);
|
||||||
|
}
|
||||||
|
|
||||||
|
deleteTask(path);
|
||||||
|
}
|
||||||
|
break;
|
||||||
|
|
||||||
|
default:
|
||||||
|
LOG.error("ERROR while getting status of task: " + path + " ERROR: " +
|
||||||
|
KeeperException.create(KeeperException.Code.get(rc)));
|
||||||
|
}
|
||||||
|
};
|
||||||
|
|
||||||
|
AsyncCallback.StatCallback setStatusWatchCallback = (rc, path, ctx, stat) -> {
|
||||||
|
switch (KeeperException.Code.get(rc)) {
|
||||||
|
case CONNECTIONLOSS:
|
||||||
|
//ConnectionLoss while setting watch on status ZNode, setting again.
|
||||||
|
recreateZKConnection();
|
||||||
|
setStatusWatch(path, (TaskObject) ctx);
|
||||||
|
break;
|
||||||
|
|
||||||
|
case OK:
|
||||||
|
if(stat != null) {
|
||||||
|
getStatus(path, null);
|
||||||
|
}
|
||||||
|
break;
|
||||||
|
|
||||||
|
default:
|
||||||
|
LOG.error("ERROR while setting watch on task ZNode: " + path + " ERROR: " +
|
||||||
|
KeeperException.create(KeeperException.Code.get(rc)));
|
||||||
|
}
|
||||||
|
};
|
||||||
|
|
||||||
|
AsyncCallback.StringCallback submitTaskCallback = (rc, path, ctx, name) -> {
|
||||||
|
switch (KeeperException.Code.get(rc)) {
|
||||||
|
case CONNECTIONLOSS:
|
||||||
|
// Connection to server was lost while submitting task, submitting again.
|
||||||
|
recreateZKConnection();
|
||||||
|
submitTask((TaskObject) ctx);
|
||||||
|
break;
|
||||||
|
|
||||||
|
case OK:
|
||||||
|
LOG.info("Task created : " + name);
|
||||||
|
setStatusWatch(name, (TaskObject) ctx);
|
||||||
|
break;
|
||||||
|
|
||||||
|
default:
|
||||||
|
LOG.error("Error submitting task: " + name + " ERROR:" +
|
||||||
|
KeeperException.create(KeeperException.Code.get(rc)));
|
||||||
|
}
|
||||||
|
};
|
||||||
|
|
||||||
|
AsyncCallback.VoidCallback taskDeleteCallback = new AsyncCallback.VoidCallback() {
|
||||||
|
@Override
|
||||||
|
public void processResult(int rc, String path, Object ctx) {
|
||||||
|
switch (KeeperException.Code.get(rc)) {
|
||||||
|
case CONNECTIONLOSS:
|
||||||
|
//Connectionloss while deleting task, deleting again
|
||||||
|
recreateZKConnection();
|
||||||
|
deleteTask(path);
|
||||||
|
break;
|
||||||
|
|
||||||
|
case OK:
|
||||||
|
LOG.info("Task Deleted successfully!");
|
||||||
|
LOG.info("Closing ZooKeeper Connection");
|
||||||
|
try {
|
||||||
|
zk.close();
|
||||||
|
} catch (InterruptedException e) {
|
||||||
|
LOG.error("Error while closing ZooKeeper Connection.");
|
||||||
|
}
|
||||||
|
break;
|
||||||
|
|
||||||
|
default:
|
||||||
|
LOG.error("ERROR while deleting task: " + path + " ERROR: " +
|
||||||
|
KeeperException.create(KeeperException.Code.get(rc)));
|
||||||
|
}
|
||||||
|
}
|
||||||
|
};
|
||||||
|
|
||||||
|
|
||||||
|
private void recreateZKConnection() {
|
||||||
|
try {
|
||||||
|
zk.close();
|
||||||
|
} catch (InterruptedException e) {
|
||||||
|
LOG.error("Error closing ZK connection : ", e);
|
||||||
|
} finally {
|
||||||
|
try {
|
||||||
|
createNewZKConnection();
|
||||||
|
} catch (IOException e) {
|
||||||
|
LOG.error("Error creating new ZK COnnection for agent: ", e);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
static class TaskObject {
|
||||||
|
private final String command;
|
||||||
|
private final String taskHostname;
|
||||||
|
|
||||||
|
public TaskObject(String command, String taskHostname) {
|
||||||
|
this.command = command;
|
||||||
|
this.taskHostname = taskHostname;
|
||||||
|
}
|
||||||
|
|
||||||
|
public String getCommand() {
|
||||||
|
return this.command;
|
||||||
|
}
|
||||||
|
|
||||||
|
public String getTaskHostname() {
|
||||||
|
return taskHostname;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
}
|
||||||
|
|
@ -0,0 +1,120 @@
|
||||||
|
/**
|
||||||
|
* 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 java.io.IOException;
|
||||||
|
import java.util.Arrays;
|
||||||
|
import java.util.stream.Collectors;
|
||||||
|
|
||||||
|
import org.apache.hadoop.conf.Configured;
|
||||||
|
import org.apache.yetus.audience.InterfaceAudience;
|
||||||
|
import org.slf4j.Logger;
|
||||||
|
import org.slf4j.LoggerFactory;
|
||||||
|
|
||||||
|
@InterfaceAudience.Private
|
||||||
|
public class ZNodeClusterManager extends Configured implements ClusterManager {
|
||||||
|
private static final Logger LOG = LoggerFactory.getLogger(ZNodeClusterManager.class.getName());
|
||||||
|
private static final String SIGKILL = "SIGKILL";
|
||||||
|
private static final String SIGSTOP = "SIGSTOP";
|
||||||
|
private static final String SIGCONT = "SIGCONT";
|
||||||
|
public ZNodeClusterManager() {
|
||||||
|
}
|
||||||
|
|
||||||
|
private String getZKQuorumServersStringFromHbaseConfig() {
|
||||||
|
String port =
|
||||||
|
Integer.toString(getConf().getInt(HConstants.ZOOKEEPER_CLIENT_PORT, 2181));
|
||||||
|
String[] serverHosts = getConf().getStrings(HConstants.ZOOKEEPER_QUORUM, "localhost");
|
||||||
|
for (int i = 0; i < serverHosts.length; i++) {
|
||||||
|
serverHosts[i] = serverHosts[i] + ":" + port;
|
||||||
|
}
|
||||||
|
return Arrays.asList(serverHosts).stream().collect(Collectors.joining(","));
|
||||||
|
}
|
||||||
|
|
||||||
|
private String createZNode(String hostname, String cmd) throws IOException{
|
||||||
|
LOG.info("Zookeeper Mode enabled sending command to zookeeper + " +
|
||||||
|
cmd + "hostname:" + hostname);
|
||||||
|
ChaosZKClient chaosZKClient = new ChaosZKClient(getZKQuorumServersStringFromHbaseConfig());
|
||||||
|
return chaosZKClient.submitTask(new ChaosZKClient.TaskObject(cmd, hostname));
|
||||||
|
}
|
||||||
|
|
||||||
|
protected HBaseClusterManager.CommandProvider getCommandProvider(ServiceType service)
|
||||||
|
throws IOException {
|
||||||
|
switch (service) {
|
||||||
|
case HADOOP_DATANODE:
|
||||||
|
case HADOOP_NAMENODE:
|
||||||
|
return new HBaseClusterManager.HadoopShellCommandProvider(getConf());
|
||||||
|
case ZOOKEEPER_SERVER:
|
||||||
|
return new HBaseClusterManager.ZookeeperShellCommandProvider(getConf());
|
||||||
|
default:
|
||||||
|
return new HBaseClusterManager.HBaseShellCommandProvider(getConf());
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
public void signal(ServiceType service, String signal, String hostname) throws IOException {
|
||||||
|
createZNode(hostname, CmdType.exec.toString() +
|
||||||
|
getCommandProvider(service).signalCommand(service, signal));
|
||||||
|
}
|
||||||
|
|
||||||
|
private void createOpCommand(String hostname, ServiceType service,
|
||||||
|
HBaseClusterManager.CommandProvider.Operation op) throws IOException{
|
||||||
|
createZNode(hostname, CmdType.exec.toString() +
|
||||||
|
getCommandProvider(service).getCommand(service, op));
|
||||||
|
}
|
||||||
|
|
||||||
|
@Override
|
||||||
|
public void start(ServiceType service, String hostname, int port) throws IOException {
|
||||||
|
createOpCommand(hostname, service, HBaseClusterManager.CommandProvider.Operation.START);
|
||||||
|
}
|
||||||
|
|
||||||
|
@Override
|
||||||
|
public void stop(ServiceType service, String hostname, int port) throws IOException {
|
||||||
|
createOpCommand(hostname, service, HBaseClusterManager.CommandProvider.Operation.STOP);
|
||||||
|
}
|
||||||
|
|
||||||
|
@Override
|
||||||
|
public void restart(ServiceType service, String hostname, int port) throws IOException {
|
||||||
|
createOpCommand(hostname, service, HBaseClusterManager.CommandProvider.Operation.RESTART);
|
||||||
|
}
|
||||||
|
|
||||||
|
@Override
|
||||||
|
public void kill(ServiceType service, String hostname, int port) throws IOException {
|
||||||
|
signal(service, SIGKILL, hostname);
|
||||||
|
}
|
||||||
|
|
||||||
|
@Override
|
||||||
|
public void suspend(ServiceType service, String hostname, int port) throws IOException {
|
||||||
|
signal(service, SIGSTOP, hostname);
|
||||||
|
}
|
||||||
|
|
||||||
|
@Override
|
||||||
|
public void resume(ServiceType service, String hostname, int port) throws IOException {
|
||||||
|
signal(service, SIGCONT, hostname);
|
||||||
|
}
|
||||||
|
|
||||||
|
@Override
|
||||||
|
public boolean isRunning(ServiceType service, String hostname, int port) throws IOException {
|
||||||
|
return Boolean.parseBoolean(createZNode(hostname, CmdType.bool.toString() +
|
||||||
|
getCommandProvider(service).isRunningCommand(service)));
|
||||||
|
}
|
||||||
|
|
||||||
|
enum CmdType {
|
||||||
|
exec,
|
||||||
|
bool
|
||||||
|
}
|
||||||
|
}
|
||||||
Loading…
Reference in New Issue