001/*
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *     http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018package org.apache.hadoop.hbase.chaos.factories;
019
020import org.apache.hadoop.hbase.chaos.actions.Action;
021import org.apache.hadoop.hbase.chaos.actions.DumpClusterStatusAction;
022import org.apache.hadoop.hbase.chaos.actions.RestartActiveMasterAction;
023import org.apache.hadoop.hbase.chaos.monkies.ChaosMonkey;
024import org.apache.hadoop.hbase.chaos.monkies.PolicyBasedChaosMonkey;
025import org.apache.hadoop.hbase.chaos.policies.PeriodicRandomActionPolicy;
026
027/**
028 * A chaos monkey to kill the active master periodically. Can be run in single master or multi
029 * master setup.
030 */
031public class MasterKillingMonkeyFactory extends MonkeyFactory {
032
033  private long action1Period;
034  private long action2Period;
035
036  private long restartActiveMasterSleepTime;
037
038  @Override
039  public ChaosMonkey build() {
040    loadProperties();
041
042    // Destructive actions to mess things around.
043    Action[] actions1 =
044      new Action[] { new RestartActiveMasterAction(restartActiveMasterSleepTime), };
045
046    // Action to log more info for debugging
047    Action[] actions2 = new Action[] { new DumpClusterStatusAction() };
048
049    return new PolicyBasedChaosMonkey(properties, util,
050      new PeriodicRandomActionPolicy(action1Period, actions1),
051      new PeriodicRandomActionPolicy(action2Period, actions2));
052  }
053
054  private void loadProperties() {
055
056    action1Period =
057      Long.parseLong(this.properties.getProperty(MonkeyConstants.PERIODIC_ACTION1_PERIOD,
058        MonkeyConstants.DEFAULT_PERIODIC_ACTION1_PERIOD + ""));
059    action2Period =
060      Long.parseLong(this.properties.getProperty(MonkeyConstants.PERIODIC_ACTION2_PERIOD,
061        MonkeyConstants.DEFAULT_PERIODIC_ACTION2_PERIOD + ""));
062    restartActiveMasterSleepTime =
063      Long.parseLong(this.properties.getProperty(MonkeyConstants.RESTART_ACTIVE_MASTER_SLEEP_TIME,
064        MonkeyConstants.DEFAULT_RESTART_ACTIVE_MASTER_SLEEP_TIME + ""));
065  }
066
067}