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| <pre><span class="source-line-no">001</span><span id="line-1">/*</span> |
| <span class="source-line-no">002</span><span id="line-2"> * Licensed to the Apache Software Foundation (ASF) under one</span> |
| <span class="source-line-no">003</span><span id="line-3"> * or more contributor license agreements. See the NOTICE file</span> |
| <span class="source-line-no">004</span><span id="line-4"> * distributed with this work for additional information</span> |
| <span class="source-line-no">005</span><span id="line-5"> * regarding copyright ownership. The ASF licenses this file</span> |
| <span class="source-line-no">006</span><span id="line-6"> * to you under the Apache License, Version 2.0 (the</span> |
| <span class="source-line-no">007</span><span id="line-7"> * "License"); you may not use this file except in compliance</span> |
| <span class="source-line-no">008</span><span id="line-8"> * with the License. You may obtain a copy of the License at</span> |
| <span class="source-line-no">009</span><span id="line-9"> *</span> |
| <span class="source-line-no">010</span><span id="line-10"> * http://www.apache.org/licenses/LICENSE-2.0</span> |
| <span class="source-line-no">011</span><span id="line-11"> *</span> |
| <span class="source-line-no">012</span><span id="line-12"> * Unless required by applicable law or agreed to in writing, software</span> |
| <span class="source-line-no">013</span><span id="line-13"> * distributed under the License is distributed on an "AS IS" BASIS,</span> |
| <span class="source-line-no">014</span><span id="line-14"> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</span> |
| <span class="source-line-no">015</span><span id="line-15"> * See the License for the specific language governing permissions and</span> |
| <span class="source-line-no">016</span><span id="line-16"> * limitations under the License.</span> |
| <span class="source-line-no">017</span><span id="line-17"> */</span> |
| <span class="source-line-no">018</span><span id="line-18">package org.apache.hadoop.hbase.chaos;</span> |
| <span class="source-line-no">019</span><span id="line-19"></span> |
| <span class="source-line-no">020</span><span id="line-20">import java.io.Closeable;</span> |
| <span class="source-line-no">021</span><span id="line-21">import java.io.IOException;</span> |
| <span class="source-line-no">022</span><span id="line-22">import java.nio.charset.StandardCharsets;</span> |
| <span class="source-line-no">023</span><span id="line-23">import java.util.ArrayList;</span> |
| <span class="source-line-no">024</span><span id="line-24">import java.util.List;</span> |
| <span class="source-line-no">025</span><span id="line-25">import java.util.concurrent.atomic.AtomicBoolean;</span> |
| <span class="source-line-no">026</span><span id="line-26">import org.apache.hadoop.conf.Configuration;</span> |
| <span class="source-line-no">027</span><span id="line-27">import org.apache.hadoop.hbase.util.Pair;</span> |
| <span class="source-line-no">028</span><span id="line-28">import org.apache.hadoop.hbase.util.RetryCounter;</span> |
| <span class="source-line-no">029</span><span id="line-29">import org.apache.hadoop.hbase.util.RetryCounterFactory;</span> |
| <span class="source-line-no">030</span><span id="line-30">import org.apache.hadoop.util.Shell;</span> |
| <span class="source-line-no">031</span><span id="line-31">import org.apache.yetus.audience.InterfaceAudience;</span> |
| <span class="source-line-no">032</span><span id="line-32">import org.apache.zookeeper.AsyncCallback;</span> |
| <span class="source-line-no">033</span><span id="line-33">import org.apache.zookeeper.CreateMode;</span> |
| <span class="source-line-no">034</span><span id="line-34">import org.apache.zookeeper.KeeperException;</span> |
| <span class="source-line-no">035</span><span id="line-35">import org.apache.zookeeper.WatchedEvent;</span> |
| <span class="source-line-no">036</span><span id="line-36">import org.apache.zookeeper.Watcher;</span> |
| <span class="source-line-no">037</span><span id="line-37">import org.apache.zookeeper.ZooDefs;</span> |
| <span class="source-line-no">038</span><span id="line-38">import org.apache.zookeeper.ZooKeeper;</span> |
| <span class="source-line-no">039</span><span id="line-39">import org.apache.zookeeper.data.Stat;</span> |
| <span class="source-line-no">040</span><span id="line-40">import org.slf4j.Logger;</span> |
| <span class="source-line-no">041</span><span id="line-41">import org.slf4j.LoggerFactory;</span> |
| <span class="source-line-no">042</span><span id="line-42"></span> |
| <span class="source-line-no">043</span><span id="line-43">/***</span> |
| <span class="source-line-no">044</span><span id="line-44"> * An agent for executing destructive actions for ChaosMonkey. Uses ZooKeeper Watchers and</span> |
| <span class="source-line-no">045</span><span id="line-45"> * LocalShell, to do the killing and getting status of service on targeted host without SSH. uses</span> |
| <span class="source-line-no">046</span><span id="line-46"> * given ZNode Structure: /perfChaosTest (root) | | /chaosAgents (Used for registration has hostname</span> |
| <span class="source-line-no">047</span><span id="line-47"> * ephemeral nodes as children) | | /chaosAgentTaskStatus (Used for task Execution, has hostname</span> |
| <span class="source-line-no">048</span><span id="line-48"> * persistent nodes as child with tasks as their children) | | /hostname | | /task0000001 (command</span> |
| <span class="source-line-no">049</span><span id="line-49"> * as data) (has two types of command : 1: starts with "exec" for executing a destructive action. 2:</span> |
| <span class="source-line-no">050</span><span id="line-50"> * starts with "bool" for getting only status of service.</span> |
| <span class="source-line-no">051</span><span id="line-51"> */</span> |
| <span class="source-line-no">052</span><span id="line-52">@InterfaceAudience.Private</span> |
| <span class="source-line-no">053</span><span id="line-53">public class ChaosAgent implements Watcher, Closeable, Runnable {</span> |
| <span class="source-line-no">054</span><span id="line-54"></span> |
| <span class="source-line-no">055</span><span id="line-55"> private static final Logger LOG = LoggerFactory.getLogger(ChaosAgent.class);</span> |
| <span class="source-line-no">056</span><span id="line-56"> static AtomicBoolean stopChaosAgent = new AtomicBoolean();</span> |
| <span class="source-line-no">057</span><span id="line-57"> private ZooKeeper zk;</span> |
| <span class="source-line-no">058</span><span id="line-58"> private String quorum;</span> |
| <span class="source-line-no">059</span><span id="line-59"> private String agentName;</span> |
| <span class="source-line-no">060</span><span id="line-60"> private Configuration conf;</span> |
| <span class="source-line-no">061</span><span id="line-61"> private RetryCounterFactory retryCounterFactory;</span> |
| <span class="source-line-no">062</span><span id="line-62"> private volatile boolean connected = false;</span> |
| <span class="source-line-no">063</span><span id="line-63"></span> |
| <span class="source-line-no">064</span><span id="line-64"> public ChaosAgent(Configuration conf, String quorum, String agentName) {</span> |
| <span class="source-line-no">065</span><span id="line-65"> initChaosAgent(conf, quorum, agentName);</span> |
| <span class="source-line-no">066</span><span id="line-66"> }</span> |
| <span class="source-line-no">067</span><span id="line-67"></span> |
| <span class="source-line-no">068</span><span id="line-68"> /***</span> |
| <span class="source-line-no">069</span><span id="line-69"> * sets global params and initiates connection with ZooKeeper then does registration.</span> |
| <span class="source-line-no">070</span><span id="line-70"> * @param conf initial configuration to use</span> |
| <span class="source-line-no">071</span><span id="line-71"> * @param quorum ZK Quorum</span> |
| <span class="source-line-no">072</span><span id="line-72"> * @param agentName AgentName to use</span> |
| <span class="source-line-no">073</span><span id="line-73"> */</span> |
| <span class="source-line-no">074</span><span id="line-74"> private void initChaosAgent(Configuration conf, String quorum, String agentName) {</span> |
| <span class="source-line-no">075</span><span id="line-75"> this.conf = conf;</span> |
| <span class="source-line-no">076</span><span id="line-76"> this.quorum = quorum;</span> |
| <span class="source-line-no">077</span><span id="line-77"> this.agentName = agentName;</span> |
| <span class="source-line-no">078</span><span id="line-78"> this.retryCounterFactory = new RetryCounterFactory(new RetryCounter.RetryConfig()</span> |
| <span class="source-line-no">079</span><span id="line-79"> .setMaxAttempts(</span> |
| <span class="source-line-no">080</span><span id="line-80"> conf.getInt(ChaosConstants.RETRY_ATTEMPTS_KEY, ChaosConstants.DEFAULT_RETRY_ATTEMPTS))</span> |
| <span class="source-line-no">081</span><span id="line-81"> .setSleepInterval(conf.getLong(ChaosConstants.RETRY_SLEEP_INTERVAL_KEY,</span> |
| <span class="source-line-no">082</span><span id="line-82"> ChaosConstants.DEFAULT_RETRY_SLEEP_INTERVAL)));</span> |
| <span class="source-line-no">083</span><span id="line-83"> try {</span> |
| <span class="source-line-no">084</span><span id="line-84"> this.createZKConnection(null);</span> |
| <span class="source-line-no">085</span><span id="line-85"> this.register();</span> |
| <span class="source-line-no">086</span><span id="line-86"> } catch (IOException e) {</span> |
| <span class="source-line-no">087</span><span id="line-87"> LOG.error("Error Creating Connection: " + e);</span> |
| <span class="source-line-no">088</span><span id="line-88"> }</span> |
| <span class="source-line-no">089</span><span id="line-89"> }</span> |
| <span class="source-line-no">090</span><span id="line-90"></span> |
| <span class="source-line-no">091</span><span id="line-91"> /***</span> |
| <span class="source-line-no">092</span><span id="line-92"> * Creates Connection with ZooKeeper.</span> |
| <span class="source-line-no">093</span><span id="line-93"> * @throws IOException if something goes wrong</span> |
| <span class="source-line-no">094</span><span id="line-94"> */</span> |
| <span class="source-line-no">095</span><span id="line-95"> private void createZKConnection(Watcher watcher) throws IOException {</span> |
| <span class="source-line-no">096</span><span id="line-96"> if (watcher == null) {</span> |
| <span class="source-line-no">097</span><span id="line-97"> zk = new ZooKeeper(quorum, ChaosConstants.SESSION_TIMEOUT_ZK, this);</span> |
| <span class="source-line-no">098</span><span id="line-98"> } else {</span> |
| <span class="source-line-no">099</span><span id="line-99"> zk = new ZooKeeper(quorum, ChaosConstants.SESSION_TIMEOUT_ZK, watcher);</span> |
| <span class="source-line-no">100</span><span id="line-100"> }</span> |
| <span class="source-line-no">101</span><span id="line-101"> LOG.info("ZooKeeper Connection created for ChaosAgent: " + agentName);</span> |
| <span class="source-line-no">102</span><span id="line-102"> }</span> |
| <span class="source-line-no">103</span><span id="line-103"></span> |
| <span class="source-line-no">104</span><span id="line-104"> // WATCHERS: Below are the Watches used by ChaosAgent</span> |
| <span class="source-line-no">105</span><span id="line-105"></span> |
| <span class="source-line-no">106</span><span id="line-106"> /***</span> |
| <span class="source-line-no">107</span><span id="line-107"> * Watcher for notifying if any task is assigned to agent or not, by seeking if any Node is being</span> |
| <span class="source-line-no">108</span><span id="line-108"> * added to agent as Child.</span> |
| <span class="source-line-no">109</span><span id="line-109"> */</span> |
| <span class="source-line-no">110</span><span id="line-110"> Watcher newTaskCreatedWatcher = new Watcher() {</span> |
| <span class="source-line-no">111</span><span id="line-111"> @Override</span> |
| <span class="source-line-no">112</span><span id="line-112"> public void process(WatchedEvent watchedEvent) {</span> |
| <span class="source-line-no">113</span><span id="line-113"> if (watchedEvent.getType() == Event.EventType.NodeChildrenChanged) {</span> |
| <span class="source-line-no">114</span><span id="line-114"> if (</span> |
| <span class="source-line-no">115</span><span id="line-115"> !(ChaosConstants.CHAOS_AGENT_STATUS_PERSISTENT_ZNODE + ChaosConstants.ZNODE_PATH_SEPARATOR</span> |
| <span class="source-line-no">116</span><span id="line-116"> + agentName).equals(watchedEvent.getPath())</span> |
| <span class="source-line-no">117</span><span id="line-117"> ) {</span> |
| <span class="source-line-no">118</span><span id="line-118"> throw new RuntimeException(</span> |
| <span class="source-line-no">119</span><span id="line-119"> KeeperException.create(KeeperException.Code.DATAINCONSISTENCY));</span> |
| <span class="source-line-no">120</span><span id="line-120"> }</span> |
| <span class="source-line-no">121</span><span id="line-121"></span> |
| <span class="source-line-no">122</span><span id="line-122"> LOG.info("Change in Tasks Node, checking for Tasks again.");</span> |
| <span class="source-line-no">123</span><span id="line-123"> getTasks();</span> |
| <span class="source-line-no">124</span><span id="line-124"> }</span> |
| <span class="source-line-no">125</span><span id="line-125"></span> |
| <span class="source-line-no">126</span><span id="line-126"> }</span> |
| <span class="source-line-no">127</span><span id="line-127"> };</span> |
| <span class="source-line-no">128</span><span id="line-128"></span> |
| <span class="source-line-no">129</span><span id="line-129"> // CALLBACKS: Below are the Callbacks used by Chaos Agent</span> |
| <span class="source-line-no">130</span><span id="line-130"></span> |
| <span class="source-line-no">131</span><span id="line-131"> /**</span> |
| <span class="source-line-no">132</span><span id="line-132"> * Callback used while setting status of a given task, Logs given status.</span> |
| <span class="source-line-no">133</span><span id="line-133"> */</span> |
| <span class="source-line-no">134</span><span id="line-134"> AsyncCallback.StatCallback setStatusOfTaskZNodeCallback = (rc, path, ctx, stat) -> {</span> |
| <span class="source-line-no">135</span><span id="line-135"> switch (KeeperException.Code.get(rc)) {</span> |
| <span class="source-line-no">136</span><span id="line-136"> case CONNECTIONLOSS:</span> |
| <span class="source-line-no">137</span><span id="line-137"> // Connection to the server was lost while setting status setting again.</span> |
| <span class="source-line-no">138</span><span id="line-138"> try {</span> |
| <span class="source-line-no">139</span><span id="line-139"> recreateZKConnection();</span> |
| <span class="source-line-no">140</span><span id="line-140"> } catch (Exception e) {</span> |
| <span class="source-line-no">141</span><span id="line-141"> break;</span> |
| <span class="source-line-no">142</span><span id="line-142"> }</span> |
| <span class="source-line-no">143</span><span id="line-143"> setStatusOfTaskZNode(path, (String) ctx);</span> |
| <span class="source-line-no">144</span><span id="line-144"> break;</span> |
| <span class="source-line-no">145</span><span id="line-145"></span> |
| <span class="source-line-no">146</span><span id="line-146"> case OK:</span> |
| <span class="source-line-no">147</span><span id="line-147"> LOG.info("Status of Task has been set");</span> |
| <span class="source-line-no">148</span><span id="line-148"> break;</span> |
| <span class="source-line-no">149</span><span id="line-149"></span> |
| <span class="source-line-no">150</span><span id="line-150"> case NONODE:</span> |
| <span class="source-line-no">151</span><span id="line-151"> LOG.error("Chaos Agent status node does not exists: "</span> |
| <span class="source-line-no">152</span><span id="line-152"> + "check for ZNode directory structure again.");</span> |
| <span class="source-line-no">153</span><span id="line-153"> break;</span> |
| <span class="source-line-no">154</span><span id="line-154"></span> |
| <span class="source-line-no">155</span><span id="line-155"> default:</span> |
| <span class="source-line-no">156</span><span id="line-156"> LOG.error("Error while setting status of task ZNode: " + path,</span> |
| <span class="source-line-no">157</span><span id="line-157"> KeeperException.create(KeeperException.Code.get(rc), path));</span> |
| <span class="source-line-no">158</span><span id="line-158"> }</span> |
| <span class="source-line-no">159</span><span id="line-159"> };</span> |
| <span class="source-line-no">160</span><span id="line-160"></span> |
| <span class="source-line-no">161</span><span id="line-161"> /**</span> |
| <span class="source-line-no">162</span><span id="line-162"> * Callback used while creating a Persistent ZNode tries to create ZNode again if Connection was</span> |
| <span class="source-line-no">163</span><span id="line-163"> * lost in previous try.</span> |
| <span class="source-line-no">164</span><span id="line-164"> */</span> |
| <span class="source-line-no">165</span><span id="line-165"> AsyncCallback.StringCallback createZNodeCallback = (rc, path, ctx, name) -> {</span> |
| <span class="source-line-no">166</span><span id="line-166"> switch (KeeperException.Code.get(rc)) {</span> |
| <span class="source-line-no">167</span><span id="line-167"> case CONNECTIONLOSS:</span> |
| <span class="source-line-no">168</span><span id="line-168"> try {</span> |
| <span class="source-line-no">169</span><span id="line-169"> recreateZKConnection();</span> |
| <span class="source-line-no">170</span><span id="line-170"> } catch (Exception e) {</span> |
| <span class="source-line-no">171</span><span id="line-171"> break;</span> |
| <span class="source-line-no">172</span><span id="line-172"> }</span> |
| <span class="source-line-no">173</span><span id="line-173"> createZNode(path, (byte[]) ctx);</span> |
| <span class="source-line-no">174</span><span id="line-174"> break;</span> |
| <span class="source-line-no">175</span><span id="line-175"> case OK:</span> |
| <span class="source-line-no">176</span><span id="line-176"> LOG.info("ZNode created : " + path);</span> |
| <span class="source-line-no">177</span><span id="line-177"> break;</span> |
| <span class="source-line-no">178</span><span id="line-178"> case NODEEXISTS:</span> |
| <span class="source-line-no">179</span><span id="line-179"> LOG.warn("ZNode already registered: " + path);</span> |
| <span class="source-line-no">180</span><span id="line-180"> break;</span> |
| <span class="source-line-no">181</span><span id="line-181"> default:</span> |
| <span class="source-line-no">182</span><span id="line-182"> LOG.error("Error occurred while creating Persistent ZNode: " + path,</span> |
| <span class="source-line-no">183</span><span id="line-183"> KeeperException.create(KeeperException.Code.get(rc), path));</span> |
| <span class="source-line-no">184</span><span id="line-184"> }</span> |
| <span class="source-line-no">185</span><span id="line-185"> };</span> |
| <span class="source-line-no">186</span><span id="line-186"></span> |
| <span class="source-line-no">187</span><span id="line-187"> /**</span> |
| <span class="source-line-no">188</span><span id="line-188"> * Callback used while creating a Ephemeral ZNode tries to create ZNode again if Connection was</span> |
| <span class="source-line-no">189</span><span id="line-189"> * lost in previous try.</span> |
| <span class="source-line-no">190</span><span id="line-190"> */</span> |
| <span class="source-line-no">191</span><span id="line-191"> AsyncCallback.StringCallback createEphemeralZNodeCallback = (rc, path, ctx, name) -> {</span> |
| <span class="source-line-no">192</span><span id="line-192"> switch (KeeperException.Code.get(rc)) {</span> |
| <span class="source-line-no">193</span><span id="line-193"> case CONNECTIONLOSS:</span> |
| <span class="source-line-no">194</span><span id="line-194"> try {</span> |
| <span class="source-line-no">195</span><span id="line-195"> recreateZKConnection();</span> |
| <span class="source-line-no">196</span><span id="line-196"> } catch (Exception e) {</span> |
| <span class="source-line-no">197</span><span id="line-197"> break;</span> |
| <span class="source-line-no">198</span><span id="line-198"> }</span> |
| <span class="source-line-no">199</span><span id="line-199"> createEphemeralZNode(path, (byte[]) ctx);</span> |
| <span class="source-line-no">200</span><span id="line-200"> break;</span> |
| <span class="source-line-no">201</span><span id="line-201"> case OK:</span> |
| <span class="source-line-no">202</span><span id="line-202"> LOG.info("ZNode created : " + path);</span> |
| <span class="source-line-no">203</span><span id="line-203"> break;</span> |
| <span class="source-line-no">204</span><span id="line-204"> case NODEEXISTS:</span> |
| <span class="source-line-no">205</span><span id="line-205"> LOG.warn("ZNode already registered: " + path);</span> |
| <span class="source-line-no">206</span><span id="line-206"> break;</span> |
| <span class="source-line-no">207</span><span id="line-207"> default:</span> |
| <span class="source-line-no">208</span><span id="line-208"> LOG.error("Error occurred while creating Ephemeral ZNode: ",</span> |
| <span class="source-line-no">209</span><span id="line-209"> KeeperException.create(KeeperException.Code.get(rc), path));</span> |
| <span class="source-line-no">210</span><span id="line-210"> }</span> |
| <span class="source-line-no">211</span><span id="line-211"> };</span> |
| <span class="source-line-no">212</span><span id="line-212"></span> |
| <span class="source-line-no">213</span><span id="line-213"> /**</span> |
| <span class="source-line-no">214</span><span id="line-214"> * Callback used by getTasksForAgentCallback while getting command, after getting command</span> |
| <span class="source-line-no">215</span><span id="line-215"> * successfully, it executes command and set its status with respect to the command type.</span> |
| <span class="source-line-no">216</span><span id="line-216"> */</span> |
| <span class="source-line-no">217</span><span id="line-217"> AsyncCallback.DataCallback getTaskForExecutionCallback = new AsyncCallback.DataCallback() {</span> |
| <span class="source-line-no">218</span><span id="line-218"> @Override</span> |
| <span class="source-line-no">219</span><span id="line-219"> public void processResult(int rc, String path, Object ctx, byte[] data, Stat stat) {</span> |
| <span class="source-line-no">220</span><span id="line-220"> switch (KeeperException.Code.get(rc)) {</span> |
| <span class="source-line-no">221</span><span id="line-221"> case CONNECTIONLOSS:</span> |
| <span class="source-line-no">222</span><span id="line-222"> // Connection to the server has been lost while getting task, getting data again.</span> |
| <span class="source-line-no">223</span><span id="line-223"> try {</span> |
| <span class="source-line-no">224</span><span id="line-224"> recreateZKConnection();</span> |
| <span class="source-line-no">225</span><span id="line-225"> } catch (Exception e) {</span> |
| <span class="source-line-no">226</span><span id="line-226"> break;</span> |
| <span class="source-line-no">227</span><span id="line-227"> }</span> |
| <span class="source-line-no">228</span><span id="line-228"> zk.getData(path, false, getTaskForExecutionCallback,</span> |
| <span class="source-line-no">229</span><span id="line-229"> new String(data, StandardCharsets.UTF_8));</span> |
| <span class="source-line-no">230</span><span id="line-230"> break;</span> |
| <span class="source-line-no">231</span><span id="line-231"> case OK:</span> |
| <span class="source-line-no">232</span><span id="line-232"> String cmd = new String(data, StandardCharsets.UTF_8);</span> |
| <span class="source-line-no">233</span><span id="line-233"> LOG.info("Executing command : " + cmd);</span> |
| <span class="source-line-no">234</span><span id="line-234"> String status = ChaosConstants.TASK_COMPLETION_STRING;</span> |
| <span class="source-line-no">235</span><span id="line-235"> try {</span> |
| <span class="source-line-no">236</span><span id="line-236"> String user =</span> |
| <span class="source-line-no">237</span><span id="line-237"> conf.get(ChaosConstants.CHAOSAGENT_SHELL_USER, ChaosConstants.DEFAULT_SHELL_USER);</span> |
| <span class="source-line-no">238</span><span id="line-238"> switch (cmd.substring(0, 4)) {</span> |
| <span class="source-line-no">239</span><span id="line-239"> case "bool":</span> |
| <span class="source-line-no">240</span><span id="line-240"> String ret = execWithRetries(user, cmd.substring(4)).getSecond();</span> |
| <span class="source-line-no">241</span><span id="line-241"> status = Boolean.toString(ret.length() > 0);</span> |
| <span class="source-line-no">242</span><span id="line-242"> break;</span> |
| <span class="source-line-no">243</span><span id="line-243"></span> |
| <span class="source-line-no">244</span><span id="line-244"> case "exec":</span> |
| <span class="source-line-no">245</span><span id="line-245"> execWithRetries(user, cmd.substring(4));</span> |
| <span class="source-line-no">246</span><span id="line-246"> break;</span> |
| <span class="source-line-no">247</span><span id="line-247"></span> |
| <span class="source-line-no">248</span><span id="line-248"> default:</span> |
| <span class="source-line-no">249</span><span id="line-249"> LOG.error("Unknown Command Type");</span> |
| <span class="source-line-no">250</span><span id="line-250"> status = ChaosConstants.TASK_ERROR_STRING;</span> |
| <span class="source-line-no">251</span><span id="line-251"> }</span> |
| <span class="source-line-no">252</span><span id="line-252"> } catch (IOException e) {</span> |
| <span class="source-line-no">253</span><span id="line-253"> LOG.error("Got error while executing command : " + cmd + " On agent : " + agentName</span> |
| <span class="source-line-no">254</span><span id="line-254"> + " Error : " + e);</span> |
| <span class="source-line-no">255</span><span id="line-255"> status = ChaosConstants.TASK_ERROR_STRING;</span> |
| <span class="source-line-no">256</span><span id="line-256"> }</span> |
| <span class="source-line-no">257</span><span id="line-257"></span> |
| <span class="source-line-no">258</span><span id="line-258"> try {</span> |
| <span class="source-line-no">259</span><span id="line-259"> setStatusOfTaskZNode(path, status);</span> |
| <span class="source-line-no">260</span><span id="line-260"> Thread.sleep(ChaosConstants.SET_STATUS_SLEEP_TIME);</span> |
| <span class="source-line-no">261</span><span id="line-261"> } catch (InterruptedException e) {</span> |
| <span class="source-line-no">262</span><span id="line-262"> LOG.error("Error occured after setting status: " + e);</span> |
| <span class="source-line-no">263</span><span id="line-263"> }</span> |
| <span class="source-line-no">264</span><span id="line-264"></span> |
| <span class="source-line-no">265</span><span id="line-265"> default:</span> |
| <span class="source-line-no">266</span><span id="line-266"> LOG.error("Error occurred while getting data",</span> |
| <span class="source-line-no">267</span><span id="line-267"> KeeperException.create(KeeperException.Code.get(rc), path));</span> |
| <span class="source-line-no">268</span><span id="line-268"> }</span> |
| <span class="source-line-no">269</span><span id="line-269"> }</span> |
| <span class="source-line-no">270</span><span id="line-270"> };</span> |
| <span class="source-line-no">271</span><span id="line-271"></span> |
| <span class="source-line-no">272</span><span id="line-272"> /***</span> |
| <span class="source-line-no">273</span><span id="line-273"> * Callback used while getting Tasks for agent if call executed without Exception, It creates a</span> |
| <span class="source-line-no">274</span><span id="line-274"> * separate thread for each children to execute given Tasks parallely.</span> |
| <span class="source-line-no">275</span><span id="line-275"> */</span> |
| <span class="source-line-no">276</span><span id="line-276"> AsyncCallback.ChildrenCallback getTasksForAgentCallback = new AsyncCallback.ChildrenCallback() {</span> |
| <span class="source-line-no">277</span><span id="line-277"> @Override</span> |
| <span class="source-line-no">278</span><span id="line-278"> public void processResult(int rc, String path, Object ctx, List<String> children) {</span> |
| <span class="source-line-no">279</span><span id="line-279"> switch (KeeperException.Code.get(rc)) {</span> |
| <span class="source-line-no">280</span><span id="line-280"> case CONNECTIONLOSS: {</span> |
| <span class="source-line-no">281</span><span id="line-281"> // Connection to the server has been lost, getting tasks again.</span> |
| <span class="source-line-no">282</span><span id="line-282"> try {</span> |
| <span class="source-line-no">283</span><span id="line-283"> recreateZKConnection();</span> |
| <span class="source-line-no">284</span><span id="line-284"> } catch (Exception e) {</span> |
| <span class="source-line-no">285</span><span id="line-285"> break;</span> |
| <span class="source-line-no">286</span><span id="line-286"> }</span> |
| <span class="source-line-no">287</span><span id="line-287"> getTasks();</span> |
| <span class="source-line-no">288</span><span id="line-288"> break;</span> |
| <span class="source-line-no">289</span><span id="line-289"> }</span> |
| <span class="source-line-no">290</span><span id="line-290"></span> |
| <span class="source-line-no">291</span><span id="line-291"> case OK: {</span> |
| <span class="source-line-no">292</span><span id="line-292"> if (children != null) {</span> |
| <span class="source-line-no">293</span><span id="line-293"> try {</span> |
| <span class="source-line-no">294</span><span id="line-294"></span> |
| <span class="source-line-no">295</span><span id="line-295"> LOG.info("Executing each task as a separate thread");</span> |
| <span class="source-line-no">296</span><span id="line-296"> List<Thread> tasksList = new ArrayList<>();</span> |
| <span class="source-line-no">297</span><span id="line-297"> for (String task : children) {</span> |
| <span class="source-line-no">298</span><span id="line-298"> String threadName = agentName + "_" + task;</span> |
| <span class="source-line-no">299</span><span id="line-299"> Thread t = new Thread(() -> {</span> |
| <span class="source-line-no">300</span><span id="line-300"></span> |
| <span class="source-line-no">301</span><span id="line-301"> LOG.info("Executing task : " + task + " of agent : " + agentName);</span> |
| <span class="source-line-no">302</span><span id="line-302"> zk.getData(</span> |
| <span class="source-line-no">303</span><span id="line-303"> ChaosConstants.CHAOS_AGENT_STATUS_PERSISTENT_ZNODE</span> |
| <span class="source-line-no">304</span><span id="line-304"> + ChaosConstants.ZNODE_PATH_SEPARATOR + agentName</span> |
| <span class="source-line-no">305</span><span id="line-305"> + ChaosConstants.ZNODE_PATH_SEPARATOR + task,</span> |
| <span class="source-line-no">306</span><span id="line-306"> false, getTaskForExecutionCallback, task);</span> |
| <span class="source-line-no">307</span><span id="line-307"></span> |
| <span class="source-line-no">308</span><span id="line-308"> });</span> |
| <span class="source-line-no">309</span><span id="line-309"> t.setName(threadName);</span> |
| <span class="source-line-no">310</span><span id="line-310"> t.start();</span> |
| <span class="source-line-no">311</span><span id="line-311"> tasksList.add(t);</span> |
| <span class="source-line-no">312</span><span id="line-312"></span> |
| <span class="source-line-no">313</span><span id="line-313"> for (Thread thread : tasksList) {</span> |
| <span class="source-line-no">314</span><span id="line-314"> thread.join();</span> |
| <span class="source-line-no">315</span><span id="line-315"> }</span> |
| <span class="source-line-no">316</span><span id="line-316"> }</span> |
| <span class="source-line-no">317</span><span id="line-317"> } catch (InterruptedException e) {</span> |
| <span class="source-line-no">318</span><span id="line-318"> LOG.error(</span> |
| <span class="source-line-no">319</span><span id="line-319"> "Error scheduling next task : " + " for agent : " + agentName + " Error : " + e);</span> |
| <span class="source-line-no">320</span><span id="line-320"> }</span> |
| <span class="source-line-no">321</span><span id="line-321"> }</span> |
| <span class="source-line-no">322</span><span id="line-322"> break;</span> |
| <span class="source-line-no">323</span><span id="line-323"> }</span> |
| <span class="source-line-no">324</span><span id="line-324"></span> |
| <span class="source-line-no">325</span><span id="line-325"> default:</span> |
| <span class="source-line-no">326</span><span id="line-326"> LOG.error("Error occurred while getting task",</span> |
| <span class="source-line-no">327</span><span id="line-327"> KeeperException.create(KeeperException.Code.get(rc), path));</span> |
| <span class="source-line-no">328</span><span id="line-328"> }</span> |
| <span class="source-line-no">329</span><span id="line-329"> }</span> |
| <span class="source-line-no">330</span><span id="line-330"> };</span> |
| <span class="source-line-no">331</span><span id="line-331"></span> |
| <span class="source-line-no">332</span><span id="line-332"> /***</span> |
| <span class="source-line-no">333</span><span id="line-333"> * Function to create PERSISTENT ZNODE with given path and data given as params</span> |
| <span class="source-line-no">334</span><span id="line-334"> * @param path Path at which ZNode to create</span> |
| <span class="source-line-no">335</span><span id="line-335"> * @param data Data to put under ZNode</span> |
| <span class="source-line-no">336</span><span id="line-336"> */</span> |
| <span class="source-line-no">337</span><span id="line-337"> public void createZNode(String path, byte[] data) {</span> |
| <span class="source-line-no">338</span><span id="line-338"> zk.create(path, data, ZooDefs.Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT, createZNodeCallback,</span> |
| <span class="source-line-no">339</span><span id="line-339"> data);</span> |
| <span class="source-line-no">340</span><span id="line-340"> }</span> |
| <span class="source-line-no">341</span><span id="line-341"></span> |
| <span class="source-line-no">342</span><span id="line-342"> /***</span> |
| <span class="source-line-no">343</span><span id="line-343"> * Function to create EPHEMERAL ZNODE with given path and data as params.</span> |
| <span class="source-line-no">344</span><span id="line-344"> * @param path Path at which Ephemeral ZNode to create</span> |
| <span class="source-line-no">345</span><span id="line-345"> * @param data Data to put under ZNode</span> |
| <span class="source-line-no">346</span><span id="line-346"> */</span> |
| <span class="source-line-no">347</span><span id="line-347"> public void createEphemeralZNode(String path, byte[] data) {</span> |
| <span class="source-line-no">348</span><span id="line-348"> zk.create(path, data, ZooDefs.Ids.OPEN_ACL_UNSAFE, CreateMode.EPHEMERAL,</span> |
| <span class="source-line-no">349</span><span id="line-349"> createEphemeralZNodeCallback, data);</span> |
| <span class="source-line-no">350</span><span id="line-350"> }</span> |
| <span class="source-line-no">351</span><span id="line-351"></span> |
| <span class="source-line-no">352</span><span id="line-352"> /**</span> |
| <span class="source-line-no">353</span><span id="line-353"> * Checks if given ZNode exists, if not creates a PERSISTENT ZNODE for same.</span> |
| <span class="source-line-no">354</span><span id="line-354"> * @param path Path to check for ZNode</span> |
| <span class="source-line-no">355</span><span id="line-355"> */</span> |
| <span class="source-line-no">356</span><span id="line-356"> private void createIfZNodeNotExists(String path) {</span> |
| <span class="source-line-no">357</span><span id="line-357"> try {</span> |
| <span class="source-line-no">358</span><span id="line-358"> if (zk.exists(path, false) == null) {</span> |
| <span class="source-line-no">359</span><span id="line-359"> createZNode(path, new byte[0]);</span> |
| <span class="source-line-no">360</span><span id="line-360"> }</span> |
| <span class="source-line-no">361</span><span id="line-361"> } catch (KeeperException | InterruptedException e) {</span> |
| <span class="source-line-no">362</span><span id="line-362"> LOG.error("Error checking given node : " + path + " " + e);</span> |
| <span class="source-line-no">363</span><span id="line-363"> }</span> |
| <span class="source-line-no">364</span><span id="line-364"> }</span> |
| <span class="source-line-no">365</span><span id="line-365"></span> |
| <span class="source-line-no">366</span><span id="line-366"> /**</span> |
| <span class="source-line-no">367</span><span id="line-367"> * sets given Status for Task Znode</span> |
| <span class="source-line-no">368</span><span id="line-368"> * @param taskZNode ZNode to set status</span> |
| <span class="source-line-no">369</span><span id="line-369"> * @param status Status value</span> |
| <span class="source-line-no">370</span><span id="line-370"> */</span> |
| <span class="source-line-no">371</span><span id="line-371"> public void setStatusOfTaskZNode(String taskZNode, String status) {</span> |
| <span class="source-line-no">372</span><span id="line-372"> LOG.info("Setting status of Task ZNode: " + taskZNode + " status : " + status);</span> |
| <span class="source-line-no">373</span><span id="line-373"> zk.setData(taskZNode, status.getBytes(StandardCharsets.UTF_8), -1, setStatusOfTaskZNodeCallback,</span> |
| <span class="source-line-no">374</span><span id="line-374"> null);</span> |
| <span class="source-line-no">375</span><span id="line-375"> }</span> |
| <span class="source-line-no">376</span><span id="line-376"></span> |
| <span class="source-line-no">377</span><span id="line-377"> /**</span> |
| <span class="source-line-no">378</span><span id="line-378"> * registration of ChaosAgent by checking and creating necessary ZNodes.</span> |
| <span class="source-line-no">379</span><span id="line-379"> */</span> |
| <span class="source-line-no">380</span><span id="line-380"> private void register() {</span> |
| <span class="source-line-no">381</span><span id="line-381"> createIfZNodeNotExists(ChaosConstants.CHAOS_TEST_ROOT_ZNODE);</span> |
| <span class="source-line-no">382</span><span id="line-382"> createIfZNodeNotExists(ChaosConstants.CHAOS_AGENT_REGISTRATION_EPIMERAL_ZNODE);</span> |
| <span class="source-line-no">383</span><span id="line-383"> createIfZNodeNotExists(ChaosConstants.CHAOS_AGENT_STATUS_PERSISTENT_ZNODE);</span> |
| <span class="source-line-no">384</span><span id="line-384"> createIfZNodeNotExists(ChaosConstants.CHAOS_AGENT_STATUS_PERSISTENT_ZNODE</span> |
| <span class="source-line-no">385</span><span id="line-385"> + ChaosConstants.ZNODE_PATH_SEPARATOR + agentName);</span> |
| <span class="source-line-no">386</span><span id="line-386"></span> |
| <span class="source-line-no">387</span><span id="line-387"> createEphemeralZNode(ChaosConstants.CHAOS_AGENT_REGISTRATION_EPIMERAL_ZNODE</span> |
| <span class="source-line-no">388</span><span id="line-388"> + ChaosConstants.ZNODE_PATH_SEPARATOR + agentName, new byte[0]);</span> |
| <span class="source-line-no">389</span><span id="line-389"> }</span> |
| <span class="source-line-no">390</span><span id="line-390"></span> |
| <span class="source-line-no">391</span><span id="line-391"> /***</span> |
| <span class="source-line-no">392</span><span id="line-392"> * Gets tasks for execution, basically sets Watch on it's respective host's Znode and waits for</span> |
| <span class="source-line-no">393</span><span id="line-393"> * tasks to be assigned, also has a getTasksForAgentCallback which handles execution of task.</span> |
| <span class="source-line-no">394</span><span id="line-394"> */</span> |
| <span class="source-line-no">395</span><span id="line-395"> private void getTasks() {</span> |
| <span class="source-line-no">396</span><span id="line-396"> LOG.info("Getting Tasks for Agent: " + agentName + "and setting watch for new Tasks");</span> |
| <span class="source-line-no">397</span><span id="line-397"> zk.getChildren(ChaosConstants.CHAOS_AGENT_STATUS_PERSISTENT_ZNODE</span> |
| <span class="source-line-no">398</span><span id="line-398"> + ChaosConstants.ZNODE_PATH_SEPARATOR + agentName, newTaskCreatedWatcher,</span> |
| <span class="source-line-no">399</span><span id="line-399"> getTasksForAgentCallback, null);</span> |
| <span class="source-line-no">400</span><span id="line-400"> }</span> |
| <span class="source-line-no">401</span><span id="line-401"></span> |
| <span class="source-line-no">402</span><span id="line-402"> /**</span> |
| <span class="source-line-no">403</span><span id="line-403"> * Below function executes command with retries with given user. Uses LocalShell to execute a</span> |
| <span class="source-line-no">404</span><span id="line-404"> * command.</span> |
| <span class="source-line-no">405</span><span id="line-405"> * @param user user name, default none</span> |
| <span class="source-line-no">406</span><span id="line-406"> * @param cmd Command to execute</span> |
| <span class="source-line-no">407</span><span id="line-407"> * @return A pair of Exit Code and Shell output</span> |
| <span class="source-line-no">408</span><span id="line-408"> * @throws IOException Exception while executing shell command</span> |
| <span class="source-line-no">409</span><span id="line-409"> */</span> |
| <span class="source-line-no">410</span><span id="line-410"> private Pair<Integer, String> execWithRetries(String user, String cmd) throws IOException {</span> |
| <span class="source-line-no">411</span><span id="line-411"> RetryCounter retryCounter = retryCounterFactory.create();</span> |
| <span class="source-line-no">412</span><span id="line-412"> while (true) {</span> |
| <span class="source-line-no">413</span><span id="line-413"> try {</span> |
| <span class="source-line-no">414</span><span id="line-414"> return exec(user, cmd);</span> |
| <span class="source-line-no">415</span><span id="line-415"> } catch (IOException e) {</span> |
| <span class="source-line-no">416</span><span id="line-416"> retryOrThrow(retryCounter, e, user, cmd);</span> |
| <span class="source-line-no">417</span><span id="line-417"> }</span> |
| <span class="source-line-no">418</span><span id="line-418"> try {</span> |
| <span class="source-line-no">419</span><span id="line-419"> retryCounter.sleepUntilNextRetry();</span> |
| <span class="source-line-no">420</span><span id="line-420"> } catch (InterruptedException e) {</span> |
| <span class="source-line-no">421</span><span id="line-421"> LOG.warn("Sleep Interrupted: " + e);</span> |
| <span class="source-line-no">422</span><span id="line-422"> }</span> |
| <span class="source-line-no">423</span><span id="line-423"> }</span> |
| <span class="source-line-no">424</span><span id="line-424"> }</span> |
| <span class="source-line-no">425</span><span id="line-425"></span> |
| <span class="source-line-no">426</span><span id="line-426"> private Pair<Integer, String> exec(String user, String cmd) throws IOException {</span> |
| <span class="source-line-no">427</span><span id="line-427"> LOG.info("Executing Shell command: " + cmd + " , user: " + user);</span> |
| <span class="source-line-no">428</span><span id="line-428"></span> |
| <span class="source-line-no">429</span><span id="line-429"> LocalShell shell = new LocalShell(user, cmd);</span> |
| <span class="source-line-no">430</span><span id="line-430"> try {</span> |
| <span class="source-line-no">431</span><span id="line-431"> shell.execute();</span> |
| <span class="source-line-no">432</span><span id="line-432"> } catch (Shell.ExitCodeException e) {</span> |
| <span class="source-line-no">433</span><span id="line-433"> String output = shell.getOutput();</span> |
| <span class="source-line-no">434</span><span id="line-434"> throw new Shell.ExitCodeException(e.getExitCode(),</span> |
| <span class="source-line-no">435</span><span id="line-435"> "stderr: " + e.getMessage() + ", stdout: " + output);</span> |
| <span class="source-line-no">436</span><span id="line-436"> }</span> |
| <span class="source-line-no">437</span><span id="line-437"> LOG.info("Executed Shell command, exit code: {}, output n{}", shell.getExitCode(),</span> |
| <span class="source-line-no">438</span><span id="line-438"> shell.getOutput());</span> |
| <span class="source-line-no">439</span><span id="line-439"></span> |
| <span class="source-line-no">440</span><span id="line-440"> return new Pair<>(shell.getExitCode(), shell.getOutput());</span> |
| <span class="source-line-no">441</span><span id="line-441"> }</span> |
| <span class="source-line-no">442</span><span id="line-442"></span> |
| <span class="source-line-no">443</span><span id="line-443"> private <E extends Exception> void retryOrThrow(RetryCounter retryCounter, E ex, String user,</span> |
| <span class="source-line-no">444</span><span id="line-444"> String cmd) throws E {</span> |
| <span class="source-line-no">445</span><span id="line-445"> if (retryCounter.shouldRetry()) {</span> |
| <span class="source-line-no">446</span><span id="line-446"> LOG.warn(</span> |
| <span class="source-line-no">447</span><span id="line-447"> "Local command: {}, user: {}, failed at attempt {}. Retrying until maxAttempts: {}."</span> |
| <span class="source-line-no">448</span><span id="line-448"> + "Exception {}",</span> |
| <span class="source-line-no">449</span><span id="line-449"> cmd, user, retryCounter.getAttemptTimes(), retryCounter.getMaxAttempts(), ex.getMessage());</span> |
| <span class="source-line-no">450</span><span id="line-450"> return;</span> |
| <span class="source-line-no">451</span><span id="line-451"> }</span> |
| <span class="source-line-no">452</span><span id="line-452"> throw ex;</span> |
| <span class="source-line-no">453</span><span id="line-453"> }</span> |
| <span class="source-line-no">454</span><span id="line-454"></span> |
| <span class="source-line-no">455</span><span id="line-455"> private boolean isConnected() {</span> |
| <span class="source-line-no">456</span><span id="line-456"> return connected;</span> |
| <span class="source-line-no">457</span><span id="line-457"> }</span> |
| <span class="source-line-no">458</span><span id="line-458"></span> |
| <span class="source-line-no">459</span><span id="line-459"> @Override</span> |
| <span class="source-line-no">460</span><span id="line-460"> public void close() throws IOException {</span> |
| <span class="source-line-no">461</span><span id="line-461"> LOG.info("Closing ZooKeeper Connection for Chaos Agent : " + agentName);</span> |
| <span class="source-line-no">462</span><span id="line-462"> try {</span> |
| <span class="source-line-no">463</span><span id="line-463"> zk.close();</span> |
| <span class="source-line-no">464</span><span id="line-464"> } catch (InterruptedException e) {</span> |
| <span class="source-line-no">465</span><span id="line-465"> LOG.error("Error while closing ZooKeeper Connection.");</span> |
| <span class="source-line-no">466</span><span id="line-466"> }</span> |
| <span class="source-line-no">467</span><span id="line-467"> }</span> |
| <span class="source-line-no">468</span><span id="line-468"></span> |
| <span class="source-line-no">469</span><span id="line-469"> @Override</span> |
| <span class="source-line-no">470</span><span id="line-470"> public void run() {</span> |
| <span class="source-line-no">471</span><span id="line-471"> try {</span> |
| <span class="source-line-no">472</span><span id="line-472"> LOG.info("Running Chaos Agent on : " + agentName);</span> |
| <span class="source-line-no">473</span><span id="line-473"> while (!this.isConnected()) {</span> |
| <span class="source-line-no">474</span><span id="line-474"> Thread.sleep(100);</span> |
| <span class="source-line-no">475</span><span id="line-475"> }</span> |
| <span class="source-line-no">476</span><span id="line-476"> this.getTasks();</span> |
| <span class="source-line-no">477</span><span id="line-477"> while (!stopChaosAgent.get()) {</span> |
| <span class="source-line-no">478</span><span id="line-478"> Thread.sleep(500);</span> |
| <span class="source-line-no">479</span><span id="line-479"> }</span> |
| <span class="source-line-no">480</span><span id="line-480"> } catch (InterruptedException e) {</span> |
| <span class="source-line-no">481</span><span id="line-481"> LOG.error("Error while running Chaos Agent", e);</span> |
| <span class="source-line-no">482</span><span id="line-482"> }</span> |
| <span class="source-line-no">483</span><span id="line-483"></span> |
| <span class="source-line-no">484</span><span id="line-484"> }</span> |
| <span class="source-line-no">485</span><span id="line-485"></span> |
| <span class="source-line-no">486</span><span id="line-486"> @Override</span> |
| <span class="source-line-no">487</span><span id="line-487"> public void process(WatchedEvent watchedEvent) {</span> |
| <span class="source-line-no">488</span><span id="line-488"> LOG.info("Processing event: " + watchedEvent.toString());</span> |
| <span class="source-line-no">489</span><span id="line-489"> if (watchedEvent.getType() == Event.EventType.None) {</span> |
| <span class="source-line-no">490</span><span id="line-490"> switch (watchedEvent.getState()) {</span> |
| <span class="source-line-no">491</span><span id="line-491"> case SyncConnected:</span> |
| <span class="source-line-no">492</span><span id="line-492"> connected = true;</span> |
| <span class="source-line-no">493</span><span id="line-493"> break;</span> |
| <span class="source-line-no">494</span><span id="line-494"> case Disconnected:</span> |
| <span class="source-line-no">495</span><span id="line-495"> connected = false;</span> |
| <span class="source-line-no">496</span><span id="line-496"> break;</span> |
| <span class="source-line-no">497</span><span id="line-497"> case Expired:</span> |
| <span class="source-line-no">498</span><span id="line-498"> connected = false;</span> |
| <span class="source-line-no">499</span><span id="line-499"> LOG.error("Session expired creating again");</span> |
| <span class="source-line-no">500</span><span id="line-500"> try {</span> |
| <span class="source-line-no">501</span><span id="line-501"> createZKConnection(null);</span> |
| <span class="source-line-no">502</span><span id="line-502"> } catch (IOException e) {</span> |
| <span class="source-line-no">503</span><span id="line-503"> LOG.error("Error creating Zookeeper connection", e);</span> |
| <span class="source-line-no">504</span><span id="line-504"> }</span> |
| <span class="source-line-no">505</span><span id="line-505"> default:</span> |
| <span class="source-line-no">506</span><span id="line-506"> LOG.error("Unknown State");</span> |
| <span class="source-line-no">507</span><span id="line-507"> break;</span> |
| <span class="source-line-no">508</span><span id="line-508"> }</span> |
| <span class="source-line-no">509</span><span id="line-509"> }</span> |
| <span class="source-line-no">510</span><span id="line-510"> }</span> |
| <span class="source-line-no">511</span><span id="line-511"></span> |
| <span class="source-line-no">512</span><span id="line-512"> private void recreateZKConnection() throws Exception {</span> |
| <span class="source-line-no">513</span><span id="line-513"> try {</span> |
| <span class="source-line-no">514</span><span id="line-514"> zk.close();</span> |
| <span class="source-line-no">515</span><span id="line-515"> createZKConnection(newTaskCreatedWatcher);</span> |
| <span class="source-line-no">516</span><span id="line-516"> createEphemeralZNode(ChaosConstants.CHAOS_AGENT_REGISTRATION_EPIMERAL_ZNODE</span> |
| <span class="source-line-no">517</span><span id="line-517"> + ChaosConstants.ZNODE_PATH_SEPARATOR + agentName, new byte[0]);</span> |
| <span class="source-line-no">518</span><span id="line-518"> } catch (IOException e) {</span> |
| <span class="source-line-no">519</span><span id="line-519"> LOG.error("Error creating new ZK COnnection for agent: {}", agentName + e);</span> |
| <span class="source-line-no">520</span><span id="line-520"> throw e;</span> |
| <span class="source-line-no">521</span><span id="line-521"> }</span> |
| <span class="source-line-no">522</span><span id="line-522"> }</span> |
| <span class="source-line-no">523</span><span id="line-523"></span> |
| <span class="source-line-no">524</span><span id="line-524"> /**</span> |
| <span class="source-line-no">525</span><span id="line-525"> * Executes Command locally.</span> |
| <span class="source-line-no">526</span><span id="line-526"> */</span> |
| <span class="source-line-no">527</span><span id="line-527"> protected static class LocalShell extends Shell.ShellCommandExecutor {</span> |
| <span class="source-line-no">528</span><span id="line-528"></span> |
| <span class="source-line-no">529</span><span id="line-529"> private String user;</span> |
| <span class="source-line-no">530</span><span id="line-530"> private String execCommand;</span> |
| <span class="source-line-no">531</span><span id="line-531"></span> |
| <span class="source-line-no">532</span><span id="line-532"> public LocalShell(String user, String execCommand) {</span> |
| <span class="source-line-no">533</span><span id="line-533"> super(new String[] { execCommand });</span> |
| <span class="source-line-no">534</span><span id="line-534"> this.user = user;</span> |
| <span class="source-line-no">535</span><span id="line-535"> this.execCommand = execCommand;</span> |
| <span class="source-line-no">536</span><span id="line-536"> }</span> |
| <span class="source-line-no">537</span><span id="line-537"></span> |
| <span class="source-line-no">538</span><span id="line-538"> @Override</span> |
| <span class="source-line-no">539</span><span id="line-539"> public String[] getExecString() {</span> |
| <span class="source-line-no">540</span><span id="line-540"> // TODO: Considering Agent is running with same user.</span> |
| <span class="source-line-no">541</span><span id="line-541"> if (!user.equals(ChaosConstants.DEFAULT_SHELL_USER)) {</span> |
| <span class="source-line-no">542</span><span id="line-542"> execCommand = String.format("su -u %1$s %2$s", user, execCommand);</span> |
| <span class="source-line-no">543</span><span id="line-543"> }</span> |
| <span class="source-line-no">544</span><span id="line-544"> return new String[] { "/usr/bin/env", "bash", "-c", execCommand };</span> |
| <span class="source-line-no">545</span><span id="line-545"> }</span> |
| <span class="source-line-no">546</span><span id="line-546"></span> |
| <span class="source-line-no">547</span><span id="line-547"> @Override</span> |
| <span class="source-line-no">548</span><span id="line-548"> public void execute() throws IOException {</span> |
| <span class="source-line-no">549</span><span id="line-549"> super.execute();</span> |
| <span class="source-line-no">550</span><span id="line-550"> }</span> |
| <span class="source-line-no">551</span><span id="line-551"> }</span> |
| <span class="source-line-no">552</span><span id="line-552">}</span> |
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| </pre> |
| </div> |
| </main> |
| </body> |
| </html> |