| <!DOCTYPE HTML> |
| <html lang="en"> |
| <head> |
| <!-- Generated by javadoc (17) --> |
| <title>Source code</title> |
| <meta name="viewport" content="width=device-width, initial-scale=1"> |
| <meta name="description" content="source: package: org.apache.hadoop.hbase, class: RESTApiClusterManager"> |
| <meta name="generator" content="javadoc/SourceToHTMLConverter"> |
| <link rel="stylesheet" type="text/css" href="../../../../../stylesheet.css" title="Style"> |
| </head> |
| <body class="source-page"> |
| <main role="main"> |
| <div class="source-container"> |
| <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;</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 static org.apache.hadoop.hbase.HBaseClusterManager.DEFAULT_RETRY_ATTEMPTS;</span> |
| <span class="source-line-no">021</span><span id="line-21">import static org.apache.hadoop.hbase.HBaseClusterManager.DEFAULT_RETRY_SLEEP_INTERVAL;</span> |
| <span class="source-line-no">022</span><span id="line-22">import static org.apache.hadoop.hbase.HBaseClusterManager.RETRY_ATTEMPTS_KEY;</span> |
| <span class="source-line-no">023</span><span id="line-23">import static org.apache.hadoop.hbase.HBaseClusterManager.RETRY_SLEEP_INTERVAL_KEY;</span> |
| <span class="source-line-no">024</span><span id="line-24"></span> |
| <span class="source-line-no">025</span><span id="line-25">import java.io.IOException;</span> |
| <span class="source-line-no">026</span><span id="line-26">import java.net.URI;</span> |
| <span class="source-line-no">027</span><span id="line-27">import java.util.Collections;</span> |
| <span class="source-line-no">028</span><span id="line-28">import java.util.HashMap;</span> |
| <span class="source-line-no">029</span><span id="line-29">import java.util.Locale;</span> |
| <span class="source-line-no">030</span><span id="line-30">import java.util.Map;</span> |
| <span class="source-line-no">031</span><span id="line-31">import java.util.Objects;</span> |
| <span class="source-line-no">032</span><span id="line-32">import java.util.Optional;</span> |
| <span class="source-line-no">033</span><span id="line-33">import java.util.concurrent.Callable;</span> |
| <span class="source-line-no">034</span><span id="line-34">import javax.xml.ws.http.HTTPException;</span> |
| <span class="source-line-no">035</span><span id="line-35">import org.apache.commons.lang3.StringUtils;</span> |
| <span class="source-line-no">036</span><span id="line-36">import org.apache.hadoop.conf.Configuration;</span> |
| <span class="source-line-no">037</span><span id="line-37">import org.apache.hadoop.conf.Configured;</span> |
| <span class="source-line-no">038</span><span id="line-38">import org.apache.hadoop.hbase.util.RetryCounter;</span> |
| <span class="source-line-no">039</span><span id="line-39">import org.apache.hadoop.hbase.util.RetryCounter.RetryConfig;</span> |
| <span class="source-line-no">040</span><span id="line-40">import org.apache.hadoop.hbase.util.RetryCounterFactory;</span> |
| <span class="source-line-no">041</span><span id="line-41">import org.apache.hadoop.util.ReflectionUtils;</span> |
| <span class="source-line-no">042</span><span id="line-42">import org.slf4j.Logger;</span> |
| <span class="source-line-no">043</span><span id="line-43">import org.slf4j.LoggerFactory;</span> |
| <span class="source-line-no">044</span><span id="line-44"></span> |
| <span class="source-line-no">045</span><span id="line-45">import org.apache.hbase.thirdparty.com.google.gson.JsonElement;</span> |
| <span class="source-line-no">046</span><span id="line-46">import org.apache.hbase.thirdparty.com.google.gson.JsonObject;</span> |
| <span class="source-line-no">047</span><span id="line-47">import org.apache.hbase.thirdparty.com.google.gson.JsonParser;</span> |
| <span class="source-line-no">048</span><span id="line-48">import org.apache.hbase.thirdparty.javax.ws.rs.client.Client;</span> |
| <span class="source-line-no">049</span><span id="line-49">import org.apache.hbase.thirdparty.javax.ws.rs.client.ClientBuilder;</span> |
| <span class="source-line-no">050</span><span id="line-50">import org.apache.hbase.thirdparty.javax.ws.rs.client.Entity;</span> |
| <span class="source-line-no">051</span><span id="line-51">import org.apache.hbase.thirdparty.javax.ws.rs.client.Invocation;</span> |
| <span class="source-line-no">052</span><span id="line-52">import org.apache.hbase.thirdparty.javax.ws.rs.client.WebTarget;</span> |
| <span class="source-line-no">053</span><span id="line-53">import org.apache.hbase.thirdparty.javax.ws.rs.core.MediaType;</span> |
| <span class="source-line-no">054</span><span id="line-54">import org.apache.hbase.thirdparty.javax.ws.rs.core.Response;</span> |
| <span class="source-line-no">055</span><span id="line-55">import org.apache.hbase.thirdparty.javax.ws.rs.core.UriBuilder;</span> |
| <span class="source-line-no">056</span><span id="line-56">import org.apache.hbase.thirdparty.org.glassfish.jersey.client.authentication.HttpAuthenticationFeature;</span> |
| <span class="source-line-no">057</span><span id="line-57"></span> |
| <span class="source-line-no">058</span><span id="line-58">/**</span> |
| <span class="source-line-no">059</span><span id="line-59"> * A ClusterManager implementation designed to control Cloudera Manager (http://www.cloudera.com)</span> |
| <span class="source-line-no">060</span><span id="line-60"> * clusters via REST API. This API uses HTTP GET requests against the cluster manager server to</span> |
| <span class="source-line-no">061</span><span id="line-61"> * retrieve information and POST/PUT requests to perform actions. As a simple example, to retrieve a</span> |
| <span class="source-line-no">062</span><span id="line-62"> * list of hosts from a CM server with login credentials admin:admin, a simple curl command would be</span> |
| <span class="source-line-no">063</span><span id="line-63"> * curl -X POST -H "Content-Type:application/json" -u admin:admin \</span> |
| <span class="source-line-no">064</span><span id="line-64"> * "http://this.is.my.server.com:7180/api/v8/hosts" This command would return a JSON result, which</span> |
| <span class="source-line-no">065</span><span id="line-65"> * would need to be parsed to retrieve relevant information. This action and many others are covered</span> |
| <span class="source-line-no">066</span><span id="line-66"> * by this class. A note on nomenclature: while the ClusterManager interface uses a ServiceType enum</span> |
| <span class="source-line-no">067</span><span id="line-67"> * when referring to things like RegionServers and DataNodes, cluster managers often use different</span> |
| <span class="source-line-no">068</span><span id="line-68"> * terminology. As an example, Cloudera Manager (http://www.cloudera.com) would refer to a</span> |
| <span class="source-line-no">069</span><span id="line-69"> * RegionServer as a "role" of the HBase "service." It would further refer to "hbase" as the</span> |
| <span class="source-line-no">070</span><span id="line-70"> * "serviceType." Apache Ambari (http://ambari.apache.org) would call the RegionServer a "component"</span> |
| <span class="source-line-no">071</span><span id="line-71"> * of the HBase "service." This class will defer to the ClusterManager terminology in methods that</span> |
| <span class="source-line-no">072</span><span id="line-72"> * it implements from that interface, but uses Cloudera Manager's terminology when dealing with its</span> |
| <span class="source-line-no">073</span><span id="line-73"> * API directly. DEBUG-level logging gives more details of the actions this class takes as they</span> |
| <span class="source-line-no">074</span><span id="line-74"> * happen. Log at TRACE-level to see the API requests and responses. TRACE-level logging on</span> |
| <span class="source-line-no">075</span><span id="line-75"> * RetryCounter displays wait times, so that can be helpful too.</span> |
| <span class="source-line-no">076</span><span id="line-76"> */</span> |
| <span class="source-line-no">077</span><span id="line-77">public class RESTApiClusterManager extends Configured implements ClusterManager {</span> |
| <span class="source-line-no">078</span><span id="line-78"> // Properties that need to be in the Configuration object to interact with the REST API cluster</span> |
| <span class="source-line-no">079</span><span id="line-79"> // manager. Most easily defined in hbase-site.xml, but can also be passed on the command line.</span> |
| <span class="source-line-no">080</span><span id="line-80"> private static final String REST_API_CLUSTER_MANAGER_HOSTNAME =</span> |
| <span class="source-line-no">081</span><span id="line-81"> "hbase.it.clustermanager.restapi.hostname";</span> |
| <span class="source-line-no">082</span><span id="line-82"> private static final String REST_API_CLUSTER_MANAGER_USERNAME =</span> |
| <span class="source-line-no">083</span><span id="line-83"> "hbase.it.clustermanager.restapi.username";</span> |
| <span class="source-line-no">084</span><span id="line-84"> private static final String REST_API_CLUSTER_MANAGER_PASSWORD =</span> |
| <span class="source-line-no">085</span><span id="line-85"> "hbase.it.clustermanager.restapi.password";</span> |
| <span class="source-line-no">086</span><span id="line-86"> private static final String REST_API_CLUSTER_MANAGER_CLUSTER_NAME =</span> |
| <span class="source-line-no">087</span><span id="line-87"> "hbase.it.clustermanager.restapi.clustername";</span> |
| <span class="source-line-no">088</span><span id="line-88"> private static final String REST_API_DELEGATE_CLUSTER_MANAGER =</span> |
| <span class="source-line-no">089</span><span id="line-89"> "hbase.it.clustermanager.restapi.delegate";</span> |
| <span class="source-line-no">090</span><span id="line-90"></span> |
| <span class="source-line-no">091</span><span id="line-91"> private static final JsonParser parser = new JsonParser();</span> |
| <span class="source-line-no">092</span><span id="line-92"></span> |
| <span class="source-line-no">093</span><span id="line-93"> // Some default values for the above properties.</span> |
| <span class="source-line-no">094</span><span id="line-94"> private static final String DEFAULT_SERVER_HOSTNAME = "http://localhost:7180";</span> |
| <span class="source-line-no">095</span><span id="line-95"> private static final String DEFAULT_SERVER_USERNAME = "admin";</span> |
| <span class="source-line-no">096</span><span id="line-96"> private static final String DEFAULT_SERVER_PASSWORD = "admin";</span> |
| <span class="source-line-no">097</span><span id="line-97"> private static final String DEFAULT_CLUSTER_NAME = "Cluster 1";</span> |
| <span class="source-line-no">098</span><span id="line-98"></span> |
| <span class="source-line-no">099</span><span id="line-99"> // Fields for the hostname, username, password, and cluster name of the cluster management server</span> |
| <span class="source-line-no">100</span><span id="line-100"> // to be used.</span> |
| <span class="source-line-no">101</span><span id="line-101"> private String serverHostname;</span> |
| <span class="source-line-no">102</span><span id="line-102"> private String clusterName;</span> |
| <span class="source-line-no">103</span><span id="line-103"></span> |
| <span class="source-line-no">104</span><span id="line-104"> // Each version of Cloudera Manager supports a particular API versions. Version 6 of this API</span> |
| <span class="source-line-no">105</span><span id="line-105"> // provides all the features needed by this class.</span> |
| <span class="source-line-no">106</span><span id="line-106"> private static final String API_VERSION = "v6";</span> |
| <span class="source-line-no">107</span><span id="line-107"></span> |
| <span class="source-line-no">108</span><span id="line-108"> // Client instances are expensive, so use the same one for all our REST queries.</span> |
| <span class="source-line-no">109</span><span id="line-109"> private final Client client = ClientBuilder.newClient();</span> |
| <span class="source-line-no">110</span><span id="line-110"></span> |
| <span class="source-line-no">111</span><span id="line-111"> // An instance of HBaseClusterManager is used for methods like the kill, resume, and suspend</span> |
| <span class="source-line-no">112</span><span id="line-112"> // because cluster managers don't tend to implement these operations.</span> |
| <span class="source-line-no">113</span><span id="line-113"> private ClusterManager hBaseClusterManager;</span> |
| <span class="source-line-no">114</span><span id="line-114"></span> |
| <span class="source-line-no">115</span><span id="line-115"> private RetryCounterFactory retryCounterFactory;</span> |
| <span class="source-line-no">116</span><span id="line-116"></span> |
| <span class="source-line-no">117</span><span id="line-117"> private static final Logger LOG = LoggerFactory.getLogger(RESTApiClusterManager.class);</span> |
| <span class="source-line-no">118</span><span id="line-118"></span> |
| <span class="source-line-no">119</span><span id="line-119"> RESTApiClusterManager() {</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"> @Override</span> |
| <span class="source-line-no">123</span><span id="line-123"> public void setConf(Configuration conf) {</span> |
| <span class="source-line-no">124</span><span id="line-124"> super.setConf(conf);</span> |
| <span class="source-line-no">125</span><span id="line-125"> if (conf == null) {</span> |
| <span class="source-line-no">126</span><span id="line-126"> // `Configured()` constructor calls `setConf(null)` before calling again with a real value.</span> |
| <span class="source-line-no">127</span><span id="line-127"> return;</span> |
| <span class="source-line-no">128</span><span id="line-128"> }</span> |
| <span class="source-line-no">129</span><span id="line-129"></span> |
| <span class="source-line-no">130</span><span id="line-130"> final Class<? extends ClusterManager> clazz = conf.getClass(REST_API_DELEGATE_CLUSTER_MANAGER,</span> |
| <span class="source-line-no">131</span><span id="line-131"> HBaseClusterManager.class, ClusterManager.class);</span> |
| <span class="source-line-no">132</span><span id="line-132"> hBaseClusterManager = ReflectionUtils.newInstance(clazz, conf);</span> |
| <span class="source-line-no">133</span><span id="line-133"></span> |
| <span class="source-line-no">134</span><span id="line-134"> serverHostname = conf.get(REST_API_CLUSTER_MANAGER_HOSTNAME, DEFAULT_SERVER_HOSTNAME);</span> |
| <span class="source-line-no">135</span><span id="line-135"> clusterName = conf.get(REST_API_CLUSTER_MANAGER_CLUSTER_NAME, DEFAULT_CLUSTER_NAME);</span> |
| <span class="source-line-no">136</span><span id="line-136"></span> |
| <span class="source-line-no">137</span><span id="line-137"> // Add filter to Client instance to enable server authentication.</span> |
| <span class="source-line-no">138</span><span id="line-138"> String serverUsername = conf.get(REST_API_CLUSTER_MANAGER_USERNAME, DEFAULT_SERVER_USERNAME);</span> |
| <span class="source-line-no">139</span><span id="line-139"> String serverPassword = conf.get(REST_API_CLUSTER_MANAGER_PASSWORD, DEFAULT_SERVER_PASSWORD);</span> |
| <span class="source-line-no">140</span><span id="line-140"> client.register(HttpAuthenticationFeature.basic(serverUsername, serverPassword));</span> |
| <span class="source-line-no">141</span><span id="line-141"></span> |
| <span class="source-line-no">142</span><span id="line-142"> this.retryCounterFactory = new RetryCounterFactory(</span> |
| <span class="source-line-no">143</span><span id="line-143"> new RetryConfig().setMaxAttempts(conf.getInt(RETRY_ATTEMPTS_KEY, DEFAULT_RETRY_ATTEMPTS))</span> |
| <span class="source-line-no">144</span><span id="line-144"> .setSleepInterval(conf.getLong(RETRY_SLEEP_INTERVAL_KEY, DEFAULT_RETRY_SLEEP_INTERVAL)));</span> |
| <span class="source-line-no">145</span><span id="line-145"> }</span> |
| <span class="source-line-no">146</span><span id="line-146"></span> |
| <span class="source-line-no">147</span><span id="line-147"> @Override</span> |
| <span class="source-line-no">148</span><span id="line-148"> public void start(ServiceType service, String hostname, int port) {</span> |
| <span class="source-line-no">149</span><span id="line-149"> // With Cloudera Manager (6.3.x), sending a START command to a service role</span> |
| <span class="source-line-no">150</span><span id="line-150"> // that is already in the "Started" state is an error. CM will log a message</span> |
| <span class="source-line-no">151</span><span id="line-151"> // saying "Role must be stopped". It will complain similarly for other</span> |
| <span class="source-line-no">152</span><span id="line-152"> // expected state transitions.</span> |
| <span class="source-line-no">153</span><span id="line-153"> // A role process that has been `kill -9`'ed ends up with the service role</span> |
| <span class="source-line-no">154</span><span id="line-154"> // retaining the "Started" state but with the process marked as "unhealthy".</span> |
| <span class="source-line-no">155</span><span id="line-155"> // Instead of blindly issuing the START command, first send a STOP command</span> |
| <span class="source-line-no">156</span><span id="line-156"> // to ensure the START will be accepted.</span> |
| <span class="source-line-no">157</span><span id="line-157"> LOG.debug("Performing start of {} on {}:{}", service, hostname, port);</span> |
| <span class="source-line-no">158</span><span id="line-158"> final RoleState currentState = getRoleState(service, hostname);</span> |
| <span class="source-line-no">159</span><span id="line-159"> switch (currentState) {</span> |
| <span class="source-line-no">160</span><span id="line-160"> case NA:</span> |
| <span class="source-line-no">161</span><span id="line-161"> case BUSY:</span> |
| <span class="source-line-no">162</span><span id="line-162"> case UNKNOWN:</span> |
| <span class="source-line-no">163</span><span id="line-163"> case HISTORY_NOT_AVAILABLE:</span> |
| <span class="source-line-no">164</span><span id="line-164"> LOG.warn("Unexpected service state detected. Service START requested, but currently in"</span> |
| <span class="source-line-no">165</span><span id="line-165"> + " {} state. Attempting to start. {}, {}:{}", currentState, service, hostname, port);</span> |
| <span class="source-line-no">166</span><span id="line-166"> performClusterManagerCommand(service, hostname, RoleCommand.START);</span> |
| <span class="source-line-no">167</span><span id="line-167"> return;</span> |
| <span class="source-line-no">168</span><span id="line-168"> case STOPPING:</span> |
| <span class="source-line-no">169</span><span id="line-169"> LOG.warn(</span> |
| <span class="source-line-no">170</span><span id="line-170"> "Unexpected service state detected. Service START requested, but currently in"</span> |
| <span class="source-line-no">171</span><span id="line-171"> + " {} state. Waiting for stop before attempting start. {}, {}:{}",</span> |
| <span class="source-line-no">172</span><span id="line-172"> currentState, service, hostname, port);</span> |
| <span class="source-line-no">173</span><span id="line-173"> waitFor(() -> Objects.equals(RoleState.STOPPED, getRoleState(service, hostname)));</span> |
| <span class="source-line-no">174</span><span id="line-174"> performClusterManagerCommand(service, hostname, RoleCommand.START);</span> |
| <span class="source-line-no">175</span><span id="line-175"> return;</span> |
| <span class="source-line-no">176</span><span id="line-176"> case STOPPED:</span> |
| <span class="source-line-no">177</span><span id="line-177"> performClusterManagerCommand(service, hostname, RoleCommand.START);</span> |
| <span class="source-line-no">178</span><span id="line-178"> return;</span> |
| <span class="source-line-no">179</span><span id="line-179"> case STARTING:</span> |
| <span class="source-line-no">180</span><span id="line-180"> LOG.warn(</span> |
| <span class="source-line-no">181</span><span id="line-181"> "Unexpected service state detected. Service START requested, but already in"</span> |
| <span class="source-line-no">182</span><span id="line-182"> + " {} state. Ignoring current request and waiting for start to complete. {}, {}:{}",</span> |
| <span class="source-line-no">183</span><span id="line-183"> currentState, service, hostname, port);</span> |
| <span class="source-line-no">184</span><span id="line-184"> waitFor(() -> Objects.equals(RoleState.STARTED, getRoleState(service, hostname)));</span> |
| <span class="source-line-no">185</span><span id="line-185"> return;</span> |
| <span class="source-line-no">186</span><span id="line-186"> case STARTED:</span> |
| <span class="source-line-no">187</span><span id="line-187"> LOG.warn("Unexpected service state detected. Service START requested, but already in"</span> |
| <span class="source-line-no">188</span><span id="line-188"> + " {} state. Restarting. {}, {}:{}", currentState, service, hostname, port);</span> |
| <span class="source-line-no">189</span><span id="line-189"> performClusterManagerCommand(service, hostname, RoleCommand.RESTART);</span> |
| <span class="source-line-no">190</span><span id="line-190"> return;</span> |
| <span class="source-line-no">191</span><span id="line-191"> }</span> |
| <span class="source-line-no">192</span><span id="line-192"> throw new RuntimeException("should not happen.");</span> |
| <span class="source-line-no">193</span><span id="line-193"> }</span> |
| <span class="source-line-no">194</span><span id="line-194"></span> |
| <span class="source-line-no">195</span><span id="line-195"> @Override</span> |
| <span class="source-line-no">196</span><span id="line-196"> public void stop(ServiceType service, String hostname, int port) {</span> |
| <span class="source-line-no">197</span><span id="line-197"> LOG.debug("Performing stop of {} on {}:{}", service, hostname, port);</span> |
| <span class="source-line-no">198</span><span id="line-198"> final RoleState currentState = getRoleState(service, hostname);</span> |
| <span class="source-line-no">199</span><span id="line-199"> switch (currentState) {</span> |
| <span class="source-line-no">200</span><span id="line-200"> case NA:</span> |
| <span class="source-line-no">201</span><span id="line-201"> case BUSY:</span> |
| <span class="source-line-no">202</span><span id="line-202"> case UNKNOWN:</span> |
| <span class="source-line-no">203</span><span id="line-203"> case HISTORY_NOT_AVAILABLE:</span> |
| <span class="source-line-no">204</span><span id="line-204"> LOG.warn("Unexpected service state detected. Service STOP requested, but already in"</span> |
| <span class="source-line-no">205</span><span id="line-205"> + " {} state. Attempting to stop. {}, {}:{}", currentState, service, hostname, port);</span> |
| <span class="source-line-no">206</span><span id="line-206"> performClusterManagerCommand(service, hostname, RoleCommand.STOP);</span> |
| <span class="source-line-no">207</span><span id="line-207"> return;</span> |
| <span class="source-line-no">208</span><span id="line-208"> case STOPPING:</span> |
| <span class="source-line-no">209</span><span id="line-209"> waitFor(() -> Objects.equals(RoleState.STOPPED, getRoleState(service, hostname)));</span> |
| <span class="source-line-no">210</span><span id="line-210"> return;</span> |
| <span class="source-line-no">211</span><span id="line-211"> case STOPPED:</span> |
| <span class="source-line-no">212</span><span id="line-212"> LOG.warn(</span> |
| <span class="source-line-no">213</span><span id="line-213"> "Unexpected service state detected. Service STOP requested, but already in"</span> |
| <span class="source-line-no">214</span><span id="line-214"> + " {} state. Ignoring current request. {}, {}:{}",</span> |
| <span class="source-line-no">215</span><span id="line-215"> currentState, service, hostname, port);</span> |
| <span class="source-line-no">216</span><span id="line-216"> return;</span> |
| <span class="source-line-no">217</span><span id="line-217"> case STARTING:</span> |
| <span class="source-line-no">218</span><span id="line-218"> LOG.warn(</span> |
| <span class="source-line-no">219</span><span id="line-219"> "Unexpected service state detected. Service STOP requested, but already in"</span> |
| <span class="source-line-no">220</span><span id="line-220"> + " {} state. Waiting for start to complete. {}, {}:{}",</span> |
| <span class="source-line-no">221</span><span id="line-221"> currentState, service, hostname, port);</span> |
| <span class="source-line-no">222</span><span id="line-222"> waitFor(() -> Objects.equals(RoleState.STARTED, getRoleState(service, hostname)));</span> |
| <span class="source-line-no">223</span><span id="line-223"> performClusterManagerCommand(service, hostname, RoleCommand.STOP);</span> |
| <span class="source-line-no">224</span><span id="line-224"> return;</span> |
| <span class="source-line-no">225</span><span id="line-225"> case STARTED:</span> |
| <span class="source-line-no">226</span><span id="line-226"> performClusterManagerCommand(service, hostname, RoleCommand.STOP);</span> |
| <span class="source-line-no">227</span><span id="line-227"> return;</span> |
| <span class="source-line-no">228</span><span id="line-228"> }</span> |
| <span class="source-line-no">229</span><span id="line-229"> throw new RuntimeException("should not happen.");</span> |
| <span class="source-line-no">230</span><span id="line-230"> }</span> |
| <span class="source-line-no">231</span><span id="line-231"></span> |
| <span class="source-line-no">232</span><span id="line-232"> @Override</span> |
| <span class="source-line-no">233</span><span id="line-233"> public void restart(ServiceType service, String hostname, int port) {</span> |
| <span class="source-line-no">234</span><span id="line-234"> LOG.debug("Performing stop followed by start of {} on {}:{}", service, hostname, port);</span> |
| <span class="source-line-no">235</span><span id="line-235"> stop(service, hostname, port);</span> |
| <span class="source-line-no">236</span><span id="line-236"> start(service, hostname, port);</span> |
| <span class="source-line-no">237</span><span id="line-237"> }</span> |
| <span class="source-line-no">238</span><span id="line-238"></span> |
| <span class="source-line-no">239</span><span id="line-239"> @Override</span> |
| <span class="source-line-no">240</span><span id="line-240"> public boolean isRunning(ServiceType service, String hostname, int port) {</span> |
| <span class="source-line-no">241</span><span id="line-241"> LOG.debug("Issuing isRunning request against {} on {}:{}", service, hostname, port);</span> |
| <span class="source-line-no">242</span><span id="line-242"> return executeWithRetries(() -> {</span> |
| <span class="source-line-no">243</span><span id="line-243"> String serviceName = getServiceName(roleServiceType.get(service));</span> |
| <span class="source-line-no">244</span><span id="line-244"> String hostId = getHostId(hostname);</span> |
| <span class="source-line-no">245</span><span id="line-245"> RoleState roleState = getRoleState(serviceName, service.toString(), hostId);</span> |
| <span class="source-line-no">246</span><span id="line-246"> HealthSummary healthSummary = getHealthSummary(serviceName, service.toString(), hostId);</span> |
| <span class="source-line-no">247</span><span id="line-247"> return Objects.equals(RoleState.STARTED, roleState)</span> |
| <span class="source-line-no">248</span><span id="line-248"> && Objects.equals(HealthSummary.GOOD, healthSummary);</span> |
| <span class="source-line-no">249</span><span id="line-249"> });</span> |
| <span class="source-line-no">250</span><span id="line-250"> }</span> |
| <span class="source-line-no">251</span><span id="line-251"></span> |
| <span class="source-line-no">252</span><span id="line-252"> @Override</span> |
| <span class="source-line-no">253</span><span id="line-253"> public void kill(ServiceType service, String hostname, int port) throws IOException {</span> |
| <span class="source-line-no">254</span><span id="line-254"> hBaseClusterManager.kill(service, hostname, port);</span> |
| <span class="source-line-no">255</span><span id="line-255"> }</span> |
| <span class="source-line-no">256</span><span id="line-256"></span> |
| <span class="source-line-no">257</span><span id="line-257"> @Override</span> |
| <span class="source-line-no">258</span><span id="line-258"> public void suspend(ServiceType service, String hostname, int port) throws IOException {</span> |
| <span class="source-line-no">259</span><span id="line-259"> hBaseClusterManager.suspend(service, hostname, port);</span> |
| <span class="source-line-no">260</span><span id="line-260"> }</span> |
| <span class="source-line-no">261</span><span id="line-261"></span> |
| <span class="source-line-no">262</span><span id="line-262"> @Override</span> |
| <span class="source-line-no">263</span><span id="line-263"> public void resume(ServiceType service, String hostname, int port) throws IOException {</span> |
| <span class="source-line-no">264</span><span id="line-264"> hBaseClusterManager.resume(service, hostname, port);</span> |
| <span class="source-line-no">265</span><span id="line-265"> }</span> |
| <span class="source-line-no">266</span><span id="line-266"></span> |
| <span class="source-line-no">267</span><span id="line-267"> // Convenience method to execute command against role on hostname. Only graceful commands are</span> |
| <span class="source-line-no">268</span><span id="line-268"> // supported since cluster management APIs don't tend to let you SIGKILL things.</span> |
| <span class="source-line-no">269</span><span id="line-269"> private void performClusterManagerCommand(ServiceType role, String hostname,</span> |
| <span class="source-line-no">270</span><span id="line-270"> RoleCommand command) {</span> |
| <span class="source-line-no">271</span><span id="line-271"> // retry submitting the command until the submission succeeds.</span> |
| <span class="source-line-no">272</span><span id="line-272"> final long commandId = executeWithRetries(() -> {</span> |
| <span class="source-line-no">273</span><span id="line-273"> final String serviceName = getServiceName(roleServiceType.get(role));</span> |
| <span class="source-line-no">274</span><span id="line-274"> final String hostId = getHostId(hostname);</span> |
| <span class="source-line-no">275</span><span id="line-275"> final String roleName = getRoleName(serviceName, role.toString(), hostId);</span> |
| <span class="source-line-no">276</span><span id="line-276"> return doRoleCommand(serviceName, roleName, command);</span> |
| <span class="source-line-no">277</span><span id="line-277"> });</span> |
| <span class="source-line-no">278</span><span id="line-278"> LOG.debug("Command {} of {} on {} submitted as commandId {}", command, role, hostname,</span> |
| <span class="source-line-no">279</span><span id="line-279"> commandId);</span> |
| <span class="source-line-no">280</span><span id="line-280"></span> |
| <span class="source-line-no">281</span><span id="line-281"> // assume the submitted command was asynchronous. wait on the commandId to be marked as</span> |
| <span class="source-line-no">282</span><span id="line-282"> // successful.</span> |
| <span class="source-line-no">283</span><span id="line-283"> waitFor(() -> hasCommandCompleted(commandId));</span> |
| <span class="source-line-no">284</span><span id="line-284"> if (!executeWithRetries(() -> hasCommandCompletedSuccessfully(commandId))) {</span> |
| <span class="source-line-no">285</span><span id="line-285"> final String msg = String.format("Command %s of %s on %s submitted as commandId %s failed.",</span> |
| <span class="source-line-no">286</span><span id="line-286"> command, role, hostname, commandId);</span> |
| <span class="source-line-no">287</span><span id="line-287"> // TODO: this does not interrupt the monkey. should it?</span> |
| <span class="source-line-no">288</span><span id="line-288"> throw new RuntimeException(msg);</span> |
| <span class="source-line-no">289</span><span id="line-289"> }</span> |
| <span class="source-line-no">290</span><span id="line-290"> LOG.debug("Command {} of {} on {} submitted as commandId {} completed successfully.", command,</span> |
| <span class="source-line-no">291</span><span id="line-291"> role, hostname, commandId);</span> |
| <span class="source-line-no">292</span><span id="line-292"> }</span> |
| <span class="source-line-no">293</span><span id="line-293"></span> |
| <span class="source-line-no">294</span><span id="line-294"> /**</span> |
| <span class="source-line-no">295</span><span id="line-295"> * Issues a command (e.g. starting or stopping a role).</span> |
| <span class="source-line-no">296</span><span id="line-296"> * @return the commandId of a successfully submitted asynchronous command.</span> |
| <span class="source-line-no">297</span><span id="line-297"> */</span> |
| <span class="source-line-no">298</span><span id="line-298"> private long doRoleCommand(String serviceName, String roleName, RoleCommand roleCommand) {</span> |
| <span class="source-line-no">299</span><span id="line-299"> URI uri = UriBuilder.fromUri(serverHostname).path("api").path(API_VERSION).path("clusters")</span> |
| <span class="source-line-no">300</span><span id="line-300"> .path(clusterName).path("services").path(serviceName).path("roleCommands")</span> |
| <span class="source-line-no">301</span><span id="line-301"> .path(roleCommand.toString()).build();</span> |
| <span class="source-line-no">302</span><span id="line-302"> String body = "{ \"items\": [ \"" + roleName + "\" ] }";</span> |
| <span class="source-line-no">303</span><span id="line-303"> LOG.trace("Executing POST against {} with body {} ...", uri, body);</span> |
| <span class="source-line-no">304</span><span id="line-304"> WebTarget webTarget = client.target(uri);</span> |
| <span class="source-line-no">305</span><span id="line-305"> Invocation.Builder invocationBuilder = webTarget.request(MediaType.APPLICATION_JSON);</span> |
| <span class="source-line-no">306</span><span id="line-306"> Response response = invocationBuilder.post(Entity.json(body));</span> |
| <span class="source-line-no">307</span><span id="line-307"> final int statusCode = response.getStatus();</span> |
| <span class="source-line-no">308</span><span id="line-308"> final String responseBody = response.readEntity(String.class);</span> |
| <span class="source-line-no">309</span><span id="line-309"> if (statusCode != Response.Status.OK.getStatusCode()) {</span> |
| <span class="source-line-no">310</span><span id="line-310"> LOG.warn("RoleCommand failed with status code {} and response body {}", statusCode,</span> |
| <span class="source-line-no">311</span><span id="line-311"> responseBody);</span> |
| <span class="source-line-no">312</span><span id="line-312"> throw new HTTPException(statusCode);</span> |
| <span class="source-line-no">313</span><span id="line-313"> }</span> |
| <span class="source-line-no">314</span><span id="line-314"></span> |
| <span class="source-line-no">315</span><span id="line-315"> LOG.trace("POST against {} completed with status code {} and response body {}", uri, statusCode,</span> |
| <span class="source-line-no">316</span><span id="line-316"> responseBody);</span> |
| <span class="source-line-no">317</span><span id="line-317"> return parser.parse(responseBody).getAsJsonObject().get("items").getAsJsonArray().get(0)</span> |
| <span class="source-line-no">318</span><span id="line-318"> .getAsJsonObject().get("id").getAsLong();</span> |
| <span class="source-line-no">319</span><span id="line-319"> }</span> |
| <span class="source-line-no">320</span><span id="line-320"></span> |
| <span class="source-line-no">321</span><span id="line-321"> private HealthSummary getHealthSummary(String serviceName, String roleType, String hostId) {</span> |
| <span class="source-line-no">322</span><span id="line-322"> return HealthSummary</span> |
| <span class="source-line-no">323</span><span id="line-323"> .fromString(getRolePropertyValue(serviceName, roleType, hostId, "healthSummary"));</span> |
| <span class="source-line-no">324</span><span id="line-324"> }</span> |
| <span class="source-line-no">325</span><span id="line-325"></span> |
| <span class="source-line-no">326</span><span id="line-326"> // This API uses a hostId to execute host-specific commands; get one from a hostname.</span> |
| <span class="source-line-no">327</span><span id="line-327"> private String getHostId(String hostname) {</span> |
| <span class="source-line-no">328</span><span id="line-328"> String hostId = null;</span> |
| <span class="source-line-no">329</span><span id="line-329"> URI uri =</span> |
| <span class="source-line-no">330</span><span id="line-330"> UriBuilder.fromUri(serverHostname).path("api").path(API_VERSION).path("hosts").build();</span> |
| <span class="source-line-no">331</span><span id="line-331"> JsonElement hosts = parser.parse(getFromURIGet(uri)).getAsJsonObject().get("items");</span> |
| <span class="source-line-no">332</span><span id="line-332"> if (hosts != null) {</span> |
| <span class="source-line-no">333</span><span id="line-333"> // Iterate through the list of hosts, stopping once you've reached the requested hostname.</span> |
| <span class="source-line-no">334</span><span id="line-334"> for (JsonElement host : hosts.getAsJsonArray()) {</span> |
| <span class="source-line-no">335</span><span id="line-335"> if (host.getAsJsonObject().get("hostname").getAsString().equals(hostname)) {</span> |
| <span class="source-line-no">336</span><span id="line-336"> hostId = host.getAsJsonObject().get("hostId").getAsString();</span> |
| <span class="source-line-no">337</span><span id="line-337"> break;</span> |
| <span class="source-line-no">338</span><span id="line-338"> }</span> |
| <span class="source-line-no">339</span><span id="line-339"> }</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"> return hostId;</span> |
| <span class="source-line-no">343</span><span id="line-343"> }</span> |
| <span class="source-line-no">344</span><span id="line-344"></span> |
| <span class="source-line-no">345</span><span id="line-345"> private String getFromURIGet(URI uri) {</span> |
| <span class="source-line-no">346</span><span id="line-346"> LOG.trace("Executing GET against {} ...", uri);</span> |
| <span class="source-line-no">347</span><span id="line-347"> final Response response = client.target(uri).request(MediaType.APPLICATION_JSON_TYPE).get();</span> |
| <span class="source-line-no">348</span><span id="line-348"> int statusCode = response.getStatus();</span> |
| <span class="source-line-no">349</span><span id="line-349"> final String responseBody = response.readEntity(String.class);</span> |
| <span class="source-line-no">350</span><span id="line-350"> if (statusCode != Response.Status.OK.getStatusCode()) {</span> |
| <span class="source-line-no">351</span><span id="line-351"> LOG.warn("request failed with status code {} and response body {}", statusCode, responseBody);</span> |
| <span class="source-line-no">352</span><span id="line-352"> throw new HTTPException(statusCode);</span> |
| <span class="source-line-no">353</span><span id="line-353"> }</span> |
| <span class="source-line-no">354</span><span id="line-354"> // This API folds information as the value to an "items" attribute.</span> |
| <span class="source-line-no">355</span><span id="line-355"> LOG.trace("GET against {} completed with status code {} and response body {}", uri, statusCode,</span> |
| <span class="source-line-no">356</span><span id="line-356"> responseBody);</span> |
| <span class="source-line-no">357</span><span id="line-357"> return responseBody;</span> |
| <span class="source-line-no">358</span><span id="line-358"> }</span> |
| <span class="source-line-no">359</span><span id="line-359"></span> |
| <span class="source-line-no">360</span><span id="line-360"> // This API assigns a unique role name to each host's instance of a role.</span> |
| <span class="source-line-no">361</span><span id="line-361"> private String getRoleName(String serviceName, String roleType, String hostId) {</span> |
| <span class="source-line-no">362</span><span id="line-362"> return getRolePropertyValue(serviceName, roleType, hostId, "name");</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"> // Get the value of a property from a role on a particular host.</span> |
| <span class="source-line-no">366</span><span id="line-366"> private String getRolePropertyValue(String serviceName, String roleType, String hostId,</span> |
| <span class="source-line-no">367</span><span id="line-367"> String property) {</span> |
| <span class="source-line-no">368</span><span id="line-368"> String roleValue = null;</span> |
| <span class="source-line-no">369</span><span id="line-369"> URI uri = UriBuilder.fromUri(serverHostname).path("api").path(API_VERSION).path("clusters")</span> |
| <span class="source-line-no">370</span><span id="line-370"> .path(clusterName).path("services").path(serviceName).path("roles").build();</span> |
| <span class="source-line-no">371</span><span id="line-371"> JsonElement roles = parser.parse(getFromURIGet(uri)).getAsJsonObject().get("items");</span> |
| <span class="source-line-no">372</span><span id="line-372"> if (roles != null) {</span> |
| <span class="source-line-no">373</span><span id="line-373"> // Iterate through the list of roles, stopping once the requested one is found.</span> |
| <span class="source-line-no">374</span><span id="line-374"> for (JsonElement role : roles.getAsJsonArray()) {</span> |
| <span class="source-line-no">375</span><span id="line-375"> JsonObject roleObj = role.getAsJsonObject();</span> |
| <span class="source-line-no">376</span><span id="line-376"> if (</span> |
| <span class="source-line-no">377</span><span id="line-377"> roleObj.get("hostRef").getAsJsonObject().get("hostId").getAsString().equals(hostId)</span> |
| <span class="source-line-no">378</span><span id="line-378"> && roleObj.get("type").getAsString().toLowerCase(Locale.ROOT)</span> |
| <span class="source-line-no">379</span><span id="line-379"> .equals(roleType.toLowerCase(Locale.ROOT))</span> |
| <span class="source-line-no">380</span><span id="line-380"> ) {</span> |
| <span class="source-line-no">381</span><span id="line-381"> roleValue = roleObj.get(property).getAsString();</span> |
| <span class="source-line-no">382</span><span id="line-382"> break;</span> |
| <span class="source-line-no">383</span><span id="line-383"> }</span> |
| <span class="source-line-no">384</span><span id="line-384"> }</span> |
| <span class="source-line-no">385</span><span id="line-385"> }</span> |
| <span class="source-line-no">386</span><span id="line-386"></span> |
| <span class="source-line-no">387</span><span id="line-387"> return roleValue;</span> |
| <span class="source-line-no">388</span><span id="line-388"> }</span> |
| <span class="source-line-no">389</span><span id="line-389"></span> |
| <span class="source-line-no">390</span><span id="line-390"> private RoleState getRoleState(ServiceType service, String hostname) {</span> |
| <span class="source-line-no">391</span><span id="line-391"> return executeWithRetries(() -> {</span> |
| <span class="source-line-no">392</span><span id="line-392"> String serviceName = getServiceName(roleServiceType.get(service));</span> |
| <span class="source-line-no">393</span><span id="line-393"> String hostId = getHostId(hostname);</span> |
| <span class="source-line-no">394</span><span id="line-394"> RoleState state = getRoleState(serviceName, service.toString(), hostId);</span> |
| <span class="source-line-no">395</span><span id="line-395"> // sometimes the response (usually the first) is null. retry those.</span> |
| <span class="source-line-no">396</span><span id="line-396"> return Objects.requireNonNull(state);</span> |
| <span class="source-line-no">397</span><span id="line-397"> });</span> |
| <span class="source-line-no">398</span><span id="line-398"> }</span> |
| <span class="source-line-no">399</span><span id="line-399"></span> |
| <span class="source-line-no">400</span><span id="line-400"> private RoleState getRoleState(String serviceName, String roleType, String hostId) {</span> |
| <span class="source-line-no">401</span><span id="line-401"> return RoleState.fromString(getRolePropertyValue(serviceName, roleType, hostId, "roleState"));</span> |
| <span class="source-line-no">402</span><span id="line-402"> }</span> |
| <span class="source-line-no">403</span><span id="line-403"></span> |
| <span class="source-line-no">404</span><span id="line-404"> // Convert a service (e.g. "HBASE," "HDFS") into a service name (e.g. "HBASE-1," "HDFS-1").</span> |
| <span class="source-line-no">405</span><span id="line-405"> private String getServiceName(Service service) {</span> |
| <span class="source-line-no">406</span><span id="line-406"> String serviceName = null;</span> |
| <span class="source-line-no">407</span><span id="line-407"> URI uri = UriBuilder.fromUri(serverHostname).path("api").path(API_VERSION).path("clusters")</span> |
| <span class="source-line-no">408</span><span id="line-408"> .path(clusterName).path("services").build();</span> |
| <span class="source-line-no">409</span><span id="line-409"> JsonElement services = parser.parse(getFromURIGet(uri)).getAsJsonObject().get("items");</span> |
| <span class="source-line-no">410</span><span id="line-410"> if (services != null) {</span> |
| <span class="source-line-no">411</span><span id="line-411"> // Iterate through the list of services, stopping once the requested one is found.</span> |
| <span class="source-line-no">412</span><span id="line-412"> for (JsonElement serviceEntry : services.getAsJsonArray()) {</span> |
| <span class="source-line-no">413</span><span id="line-413"> if (serviceEntry.getAsJsonObject().get("type").getAsString().equals(service.toString())) {</span> |
| <span class="source-line-no">414</span><span id="line-414"> serviceName = serviceEntry.getAsJsonObject().get("name").getAsString();</span> |
| <span class="source-line-no">415</span><span id="line-415"> break;</span> |
| <span class="source-line-no">416</span><span id="line-416"> }</span> |
| <span class="source-line-no">417</span><span id="line-417"> }</span> |
| <span class="source-line-no">418</span><span id="line-418"> }</span> |
| <span class="source-line-no">419</span><span id="line-419"></span> |
| <span class="source-line-no">420</span><span id="line-420"> return serviceName;</span> |
| <span class="source-line-no">421</span><span id="line-421"> }</span> |
| <span class="source-line-no">422</span><span id="line-422"></span> |
| <span class="source-line-no">423</span><span id="line-423"> private Optional<JsonObject> getCommand(final long commandId) {</span> |
| <span class="source-line-no">424</span><span id="line-424"> final URI uri = UriBuilder.fromUri(serverHostname).path("api").path(API_VERSION)</span> |
| <span class="source-line-no">425</span><span id="line-425"> .path("commands").path(Long.toString(commandId)).build();</span> |
| <span class="source-line-no">426</span><span id="line-426"> return Optional.ofNullable(getFromURIGet(uri)).map(parser::parse)</span> |
| <span class="source-line-no">427</span><span id="line-427"> .map(JsonElement::getAsJsonObject);</span> |
| <span class="source-line-no">428</span><span id="line-428"> }</span> |
| <span class="source-line-no">429</span><span id="line-429"></span> |
| <span class="source-line-no">430</span><span id="line-430"> /**</span> |
| <span class="source-line-no">431</span><span id="line-431"> * Return {@code true} if the {@code commandId} has finished processing.</span> |
| <span class="source-line-no">432</span><span id="line-432"> */</span> |
| <span class="source-line-no">433</span><span id="line-433"> private boolean hasCommandCompleted(final long commandId) {</span> |
| <span class="source-line-no">434</span><span id="line-434"> return getCommand(commandId).map(val -> {</span> |
| <span class="source-line-no">435</span><span id="line-435"> final boolean isActive = val.get("active").getAsBoolean();</span> |
| <span class="source-line-no">436</span><span id="line-436"> if (isActive) {</span> |
| <span class="source-line-no">437</span><span id="line-437"> LOG.debug("command {} is still active.", commandId);</span> |
| <span class="source-line-no">438</span><span id="line-438"> }</span> |
| <span class="source-line-no">439</span><span id="line-439"> return !isActive;</span> |
| <span class="source-line-no">440</span><span id="line-440"> }).orElse(false);</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"> /**</span> |
| <span class="source-line-no">444</span><span id="line-444"> * Return {@code true} if the {@code commandId} has finished successfully.</span> |
| <span class="source-line-no">445</span><span id="line-445"> */</span> |
| <span class="source-line-no">446</span><span id="line-446"> private boolean hasCommandCompletedSuccessfully(final long commandId) {</span> |
| <span class="source-line-no">447</span><span id="line-447"> return getCommand(commandId).filter(val -> {</span> |
| <span class="source-line-no">448</span><span id="line-448"> final boolean isActive = val.get("active").getAsBoolean();</span> |
| <span class="source-line-no">449</span><span id="line-449"> if (isActive) {</span> |
| <span class="source-line-no">450</span><span id="line-450"> LOG.debug("command {} is still active.", commandId);</span> |
| <span class="source-line-no">451</span><span id="line-451"> }</span> |
| <span class="source-line-no">452</span><span id="line-452"> return !isActive;</span> |
| <span class="source-line-no">453</span><span id="line-453"> }).map(val -> {</span> |
| <span class="source-line-no">454</span><span id="line-454"> final boolean isSuccess = val.get("success").getAsBoolean();</span> |
| <span class="source-line-no">455</span><span id="line-455"> LOG.debug("command {} completed as {}.", commandId, isSuccess);</span> |
| <span class="source-line-no">456</span><span id="line-456"> return isSuccess;</span> |
| <span class="source-line-no">457</span><span id="line-457"> }).orElse(false);</span> |
| <span class="source-line-no">458</span><span id="line-458"> }</span> |
| <span class="source-line-no">459</span><span id="line-459"></span> |
| <span class="source-line-no">460</span><span id="line-460"> /**</span> |
| <span class="source-line-no">461</span><span id="line-461"> * Helper method for executing retryable work.</span> |
| <span class="source-line-no">462</span><span id="line-462"> */</span> |
| <span class="source-line-no">463</span><span id="line-463"> private <T> T executeWithRetries(final Callable<T> callable) {</span> |
| <span class="source-line-no">464</span><span id="line-464"> final RetryCounter retryCounter = retryCounterFactory.create();</span> |
| <span class="source-line-no">465</span><span id="line-465"> while (true) {</span> |
| <span class="source-line-no">466</span><span id="line-466"> try {</span> |
| <span class="source-line-no">467</span><span id="line-467"> return callable.call();</span> |
| <span class="source-line-no">468</span><span id="line-468"> } catch (Exception e) {</span> |
| <span class="source-line-no">469</span><span id="line-469"> if (retryCounter.shouldRetry()) {</span> |
| <span class="source-line-no">470</span><span id="line-470"> LOG.debug("execution failed with exception. Retrying.", e);</span> |
| <span class="source-line-no">471</span><span id="line-471"> } else {</span> |
| <span class="source-line-no">472</span><span id="line-472"> throw new RuntimeException("retries exhausted", e);</span> |
| <span class="source-line-no">473</span><span id="line-473"> }</span> |
| <span class="source-line-no">474</span><span id="line-474"> }</span> |
| <span class="source-line-no">475</span><span id="line-475"> try {</span> |
| <span class="source-line-no">476</span><span id="line-476"> retryCounter.sleepUntilNextRetry();</span> |
| <span class="source-line-no">477</span><span id="line-477"> } catch (InterruptedException e) {</span> |
| <span class="source-line-no">478</span><span id="line-478"> throw new RuntimeException(e);</span> |
| <span class="source-line-no">479</span><span id="line-479"> }</span> |
| <span class="source-line-no">480</span><span id="line-480"> }</span> |
| <span class="source-line-no">481</span><span id="line-481"> }</span> |
| <span class="source-line-no">482</span><span id="line-482"></span> |
| <span class="source-line-no">483</span><span id="line-483"> private void waitFor(final Callable<Boolean> predicate) {</span> |
| <span class="source-line-no">484</span><span id="line-484"> final RetryCounter retryCounter = retryCounterFactory.create();</span> |
| <span class="source-line-no">485</span><span id="line-485"> while (true) {</span> |
| <span class="source-line-no">486</span><span id="line-486"> try {</span> |
| <span class="source-line-no">487</span><span id="line-487"> if (Objects.equals(true, predicate.call())) {</span> |
| <span class="source-line-no">488</span><span id="line-488"> return;</span> |
| <span class="source-line-no">489</span><span id="line-489"> }</span> |
| <span class="source-line-no">490</span><span id="line-490"> } catch (Exception e) {</span> |
| <span class="source-line-no">491</span><span id="line-491"> if (retryCounter.shouldRetry()) {</span> |
| <span class="source-line-no">492</span><span id="line-492"> LOG.debug("execution failed with exception. Retrying.", e);</span> |
| <span class="source-line-no">493</span><span id="line-493"> } else {</span> |
| <span class="source-line-no">494</span><span id="line-494"> throw new RuntimeException("retries exhausted", e);</span> |
| <span class="source-line-no">495</span><span id="line-495"> }</span> |
| <span class="source-line-no">496</span><span id="line-496"> }</span> |
| <span class="source-line-no">497</span><span id="line-497"> try {</span> |
| <span class="source-line-no">498</span><span id="line-498"> retryCounter.sleepUntilNextRetry();</span> |
| <span class="source-line-no">499</span><span id="line-499"> } catch (InterruptedException e) {</span> |
| <span class="source-line-no">500</span><span id="line-500"> throw new RuntimeException(e);</span> |
| <span class="source-line-no">501</span><span id="line-501"> }</span> |
| <span class="source-line-no">502</span><span id="line-502"> }</span> |
| <span class="source-line-no">503</span><span id="line-503"> }</span> |
| <span class="source-line-no">504</span><span id="line-504"></span> |
| <span class="source-line-no">505</span><span id="line-505"> /*</span> |
| <span class="source-line-no">506</span><span id="line-506"> * Some enums to guard against bad calls.</span> |
| <span class="source-line-no">507</span><span id="line-507"> */</span> |
| <span class="source-line-no">508</span><span id="line-508"></span> |
| <span class="source-line-no">509</span><span id="line-509"> // The RoleCommand enum is used by the doRoleCommand method to guard against non-existent methods</span> |
| <span class="source-line-no">510</span><span id="line-510"> // being invoked on a given role.</span> |
| <span class="source-line-no">511</span><span id="line-511"> // TODO: Integrate zookeeper and hdfs related failure injections (Ref: HBASE-14261).</span> |
| <span class="source-line-no">512</span><span id="line-512"> private enum RoleCommand {</span> |
| <span class="source-line-no">513</span><span id="line-513"> START,</span> |
| <span class="source-line-no">514</span><span id="line-514"> STOP,</span> |
| <span class="source-line-no">515</span><span id="line-515"> RESTART;</span> |
| <span class="source-line-no">516</span><span id="line-516"></span> |
| <span class="source-line-no">517</span><span id="line-517"> // APIs tend to take commands in lowercase, so convert them to save the trouble later.</span> |
| <span class="source-line-no">518</span><span id="line-518"> @Override</span> |
| <span class="source-line-no">519</span><span id="line-519"> public String toString() {</span> |
| <span class="source-line-no">520</span><span id="line-520"> return name().toLowerCase(Locale.ROOT);</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"> * Represents the configured run state of a role.</span> |
| <span class="source-line-no">526</span><span id="line-526"> * @see <a href=</span> |
| <span class="source-line-no">527</span><span id="line-527"> * "https://archive.cloudera.com/cm6/6.3.0/generic/jar/cm_api/apidocs/json_ApiRoleState.html"></span> |
| <span class="source-line-no">528</span><span id="line-528"> * https://archive.cloudera.com/cm6/6.3.0/generic/jar/cm_api/apidocs/json_ApiRoleState.html</a></span> |
| <span class="source-line-no">529</span><span id="line-529"> */</span> |
| <span class="source-line-no">530</span><span id="line-530"> private enum RoleState {</span> |
| <span class="source-line-no">531</span><span id="line-531"> HISTORY_NOT_AVAILABLE,</span> |
| <span class="source-line-no">532</span><span id="line-532"> UNKNOWN,</span> |
| <span class="source-line-no">533</span><span id="line-533"> STARTING,</span> |
| <span class="source-line-no">534</span><span id="line-534"> STARTED,</span> |
| <span class="source-line-no">535</span><span id="line-535"> BUSY,</span> |
| <span class="source-line-no">536</span><span id="line-536"> STOPPING,</span> |
| <span class="source-line-no">537</span><span id="line-537"> STOPPED,</span> |
| <span class="source-line-no">538</span><span id="line-538"> NA;</span> |
| <span class="source-line-no">539</span><span id="line-539"></span> |
| <span class="source-line-no">540</span><span id="line-540"> public static RoleState fromString(final String value) {</span> |
| <span class="source-line-no">541</span><span id="line-541"> if (StringUtils.isBlank(value)) {</span> |
| <span class="source-line-no">542</span><span id="line-542"> return null;</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 RoleState.valueOf(value.toUpperCase());</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"></span> |
| <span class="source-line-no">548</span><span id="line-548"> /**</span> |
| <span class="source-line-no">549</span><span id="line-549"> * Represents of the high-level health status of a subject in the cluster.</span> |
| <span class="source-line-no">550</span><span id="line-550"> * @see <a href=</span> |
| <span class="source-line-no">551</span><span id="line-551"> * "https://archive.cloudera.com/cm6/6.3.0/generic/jar/cm_api/apidocs/json_ApiHealthSummary.html"></span> |
| <span class="source-line-no">552</span><span id="line-552"> * https://archive.cloudera.com/cm6/6.3.0/generic/jar/cm_api/apidocs/json_ApiHealthSummary.html</a></span> |
| <span class="source-line-no">553</span><span id="line-553"> */</span> |
| <span class="source-line-no">554</span><span id="line-554"> private enum HealthSummary {</span> |
| <span class="source-line-no">555</span><span id="line-555"> DISABLED,</span> |
| <span class="source-line-no">556</span><span id="line-556"> HISTORY_NOT_AVAILABLE,</span> |
| <span class="source-line-no">557</span><span id="line-557"> NOT_AVAILABLE,</span> |
| <span class="source-line-no">558</span><span id="line-558"> GOOD,</span> |
| <span class="source-line-no">559</span><span id="line-559"> CONCERNING,</span> |
| <span class="source-line-no">560</span><span id="line-560"> BAD;</span> |
| <span class="source-line-no">561</span><span id="line-561"></span> |
| <span class="source-line-no">562</span><span id="line-562"> public static HealthSummary fromString(final String value) {</span> |
| <span class="source-line-no">563</span><span id="line-563"> if (StringUtils.isBlank(value)) {</span> |
| <span class="source-line-no">564</span><span id="line-564"> return null;</span> |
| <span class="source-line-no">565</span><span id="line-565"> }</span> |
| <span class="source-line-no">566</span><span id="line-566"> return HealthSummary.valueOf(value.toUpperCase());</span> |
| <span class="source-line-no">567</span><span id="line-567"> }</span> |
| <span class="source-line-no">568</span><span id="line-568"> }</span> |
| <span class="source-line-no">569</span><span id="line-569"></span> |
| <span class="source-line-no">570</span><span id="line-570"> // ClusterManager methods take a "ServiceType" object (e.g. "HBASE_MASTER," "HADOOP_NAMENODE").</span> |
| <span class="source-line-no">571</span><span id="line-571"> // These "service types," which cluster managers call "roles" or "components," need to be mapped</span> |
| <span class="source-line-no">572</span><span id="line-572"> // to their corresponding service (e.g. "HBase," "HDFS") in order to be controlled.</span> |
| <span class="source-line-no">573</span><span id="line-573"> private static final Map<ServiceType, Service> roleServiceType = buildRoleServiceTypeMap();</span> |
| <span class="source-line-no">574</span><span id="line-574"></span> |
| <span class="source-line-no">575</span><span id="line-575"> private static Map<ServiceType, Service> buildRoleServiceTypeMap() {</span> |
| <span class="source-line-no">576</span><span id="line-576"> final Map<ServiceType, Service> ret = new HashMap<>();</span> |
| <span class="source-line-no">577</span><span id="line-577"> ret.put(ServiceType.HADOOP_NAMENODE, Service.HDFS);</span> |
| <span class="source-line-no">578</span><span id="line-578"> ret.put(ServiceType.HADOOP_DATANODE, Service.HDFS);</span> |
| <span class="source-line-no">579</span><span id="line-579"> ret.put(ServiceType.HADOOP_JOBTRACKER, Service.MAPREDUCE);</span> |
| <span class="source-line-no">580</span><span id="line-580"> ret.put(ServiceType.HADOOP_TASKTRACKER, Service.MAPREDUCE);</span> |
| <span class="source-line-no">581</span><span id="line-581"> ret.put(ServiceType.HBASE_MASTER, Service.HBASE);</span> |
| <span class="source-line-no">582</span><span id="line-582"> ret.put(ServiceType.HBASE_REGIONSERVER, Service.HBASE);</span> |
| <span class="source-line-no">583</span><span id="line-583"> return Collections.unmodifiableMap(ret);</span> |
| <span class="source-line-no">584</span><span id="line-584"> }</span> |
| <span class="source-line-no">585</span><span id="line-585"></span> |
| <span class="source-line-no">586</span><span id="line-586"> enum Service {</span> |
| <span class="source-line-no">587</span><span id="line-587"> HBASE,</span> |
| <span class="source-line-no">588</span><span id="line-588"> HDFS,</span> |
| <span class="source-line-no">589</span><span id="line-589"> MAPREDUCE</span> |
| <span class="source-line-no">590</span><span id="line-590"> }</span> |
| <span class="source-line-no">591</span><span id="line-591">}</span> |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| </pre> |
| </div> |
| </main> |
| </body> |
| </html> |
