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 */
018
019package org.apache.hadoop.hbase.chaos.factories;
020
021import org.apache.hadoop.hbase.chaos.actions.Action;
022import org.apache.hadoop.hbase.chaos.actions.DumpClusterStatusAction;
023import org.apache.hadoop.hbase.chaos.actions.ForceBalancerAction;
024import org.apache.hadoop.hbase.chaos.actions.RestartActiveMasterAction;
025import org.apache.hadoop.hbase.chaos.actions.RestartRandomRsExceptMetaAction;
026import org.apache.hadoop.hbase.chaos.actions.RollingBatchRestartRsExceptMetaAction;
027import org.apache.hadoop.hbase.chaos.monkies.ChaosMonkey;
028import org.apache.hadoop.hbase.chaos.monkies.PolicyBasedChaosMonkey;
029import org.apache.hadoop.hbase.chaos.policies.CompositeSequentialPolicy;
030import org.apache.hadoop.hbase.chaos.policies.DoActionsOncePolicy;
031import org.apache.hadoop.hbase.chaos.policies.PeriodicRandomActionPolicy;
032
033/**
034 * Creates ChaosMonkeys for doing server restart actions, but not
035 * flush / compact / snapshot kind of actions.
036 */
037public class ServerKillingMonkeyFactory extends MonkeyFactory {
038
039  @Override
040  public ChaosMonkey build() {
041
042    // Destructive actions to mess things around. Cannot run batch restart
043    Action[] actions1 = new Action[] {
044        new RestartRandomRsExceptMetaAction(60000),
045        new RestartActiveMasterAction(5000),
046        new RollingBatchRestartRsExceptMetaAction(5000, 1.0f, 2), //only allow 2 servers to be dead
047        new ForceBalancerAction()
048    };
049
050    // Action to log more info for debugging
051    Action[] actions2 = new Action[] {
052        new DumpClusterStatusAction()
053    };
054
055    return new PolicyBasedChaosMonkey(util,
056      new CompositeSequentialPolicy(
057          new DoActionsOncePolicy(60 * 1000, actions1),
058          new PeriodicRandomActionPolicy(60 * 1000, actions1)),
059      new PeriodicRandomActionPolicy(60 * 1000, actions2));
060  }
061}