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| <pre><span class="sourceLineNo">001</span>/*<a name="line.1"></a> |
| <span class="sourceLineNo">002</span> * Licensed to the Apache Software Foundation (ASF) under one<a name="line.2"></a> |
| <span class="sourceLineNo">003</span> * or more contributor license agreements. See the NOTICE file<a name="line.3"></a> |
| <span class="sourceLineNo">004</span> * distributed with this work for additional information<a name="line.4"></a> |
| <span class="sourceLineNo">005</span> * regarding copyright ownership. The ASF licenses this file<a name="line.5"></a> |
| <span class="sourceLineNo">006</span> * to you under the Apache License, Version 2.0 (the<a name="line.6"></a> |
| <span class="sourceLineNo">007</span> * "License"); you may not use this file except in compliance<a name="line.7"></a> |
| <span class="sourceLineNo">008</span> * with the License. You may obtain a copy of the License at<a name="line.8"></a> |
| <span class="sourceLineNo">009</span> *<a name="line.9"></a> |
| <span class="sourceLineNo">010</span> * http://www.apache.org/licenses/LICENSE-2.0<a name="line.10"></a> |
| <span class="sourceLineNo">011</span> *<a name="line.11"></a> |
| <span class="sourceLineNo">012</span> * Unless required by applicable law or agreed to in writing, software<a name="line.12"></a> |
| <span class="sourceLineNo">013</span> * distributed under the License is distributed on an "AS IS" BASIS,<a name="line.13"></a> |
| <span class="sourceLineNo">014</span> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<a name="line.14"></a> |
| <span class="sourceLineNo">015</span> * See the License for the specific language governing permissions and<a name="line.15"></a> |
| <span class="sourceLineNo">016</span> * limitations under the License.<a name="line.16"></a> |
| <span class="sourceLineNo">017</span> */<a name="line.17"></a> |
| <span class="sourceLineNo">018</span><a name="line.18"></a> |
| <span class="sourceLineNo">019</span>package org.apache.hadoop.hbase;<a name="line.19"></a> |
| <span class="sourceLineNo">020</span><a name="line.20"></a> |
| <span class="sourceLineNo">021</span>import static org.apache.hadoop.hbase.HBaseClusterManager.DEFAULT_RETRY_ATTEMPTS;<a name="line.21"></a> |
| <span class="sourceLineNo">022</span>import static org.apache.hadoop.hbase.HBaseClusterManager.DEFAULT_RETRY_SLEEP_INTERVAL;<a name="line.22"></a> |
| <span class="sourceLineNo">023</span>import static org.apache.hadoop.hbase.HBaseClusterManager.RETRY_ATTEMPTS_KEY;<a name="line.23"></a> |
| <span class="sourceLineNo">024</span>import static org.apache.hadoop.hbase.HBaseClusterManager.RETRY_SLEEP_INTERVAL_KEY;<a name="line.24"></a> |
| <span class="sourceLineNo">025</span><a name="line.25"></a> |
| <span class="sourceLineNo">026</span>import java.io.IOException;<a name="line.26"></a> |
| <span class="sourceLineNo">027</span>import java.net.URI;<a name="line.27"></a> |
| <span class="sourceLineNo">028</span>import java.util.Collections;<a name="line.28"></a> |
| <span class="sourceLineNo">029</span>import java.util.HashMap;<a name="line.29"></a> |
| <span class="sourceLineNo">030</span>import java.util.Locale;<a name="line.30"></a> |
| <span class="sourceLineNo">031</span>import java.util.Map;<a name="line.31"></a> |
| <span class="sourceLineNo">032</span>import java.util.Objects;<a name="line.32"></a> |
| <span class="sourceLineNo">033</span>import java.util.Optional;<a name="line.33"></a> |
| <span class="sourceLineNo">034</span>import java.util.concurrent.Callable;<a name="line.34"></a> |
| <span class="sourceLineNo">035</span>import javax.ws.rs.client.Client;<a name="line.35"></a> |
| <span class="sourceLineNo">036</span>import javax.ws.rs.client.ClientBuilder;<a name="line.36"></a> |
| <span class="sourceLineNo">037</span>import javax.ws.rs.client.Entity;<a name="line.37"></a> |
| <span class="sourceLineNo">038</span>import javax.ws.rs.client.Invocation;<a name="line.38"></a> |
| <span class="sourceLineNo">039</span>import javax.ws.rs.client.WebTarget;<a name="line.39"></a> |
| <span class="sourceLineNo">040</span>import javax.ws.rs.core.MediaType;<a name="line.40"></a> |
| <span class="sourceLineNo">041</span>import javax.ws.rs.core.Response;<a name="line.41"></a> |
| <span class="sourceLineNo">042</span>import javax.ws.rs.core.UriBuilder;<a name="line.42"></a> |
| <span class="sourceLineNo">043</span>import javax.xml.ws.http.HTTPException;<a name="line.43"></a> |
| <span class="sourceLineNo">044</span>import org.apache.commons.lang3.StringUtils;<a name="line.44"></a> |
| <span class="sourceLineNo">045</span>import org.apache.hadoop.conf.Configuration;<a name="line.45"></a> |
| <span class="sourceLineNo">046</span>import org.apache.hadoop.conf.Configured;<a name="line.46"></a> |
| <span class="sourceLineNo">047</span>import org.apache.hadoop.hbase.util.RetryCounter;<a name="line.47"></a> |
| <span class="sourceLineNo">048</span>import org.apache.hadoop.hbase.util.RetryCounter.RetryConfig;<a name="line.48"></a> |
| <span class="sourceLineNo">049</span>import org.apache.hadoop.hbase.util.RetryCounterFactory;<a name="line.49"></a> |
| <span class="sourceLineNo">050</span>import org.apache.hadoop.util.ReflectionUtils;<a name="line.50"></a> |
| <span class="sourceLineNo">051</span>import org.slf4j.Logger;<a name="line.51"></a> |
| <span class="sourceLineNo">052</span>import org.slf4j.LoggerFactory;<a name="line.52"></a> |
| <span class="sourceLineNo">053</span><a name="line.53"></a> |
| <span class="sourceLineNo">054</span>import org.apache.hbase.thirdparty.com.google.gson.JsonElement;<a name="line.54"></a> |
| <span class="sourceLineNo">055</span>import org.apache.hbase.thirdparty.com.google.gson.JsonObject;<a name="line.55"></a> |
| <span class="sourceLineNo">056</span>import org.apache.hbase.thirdparty.com.google.gson.JsonParser;<a name="line.56"></a> |
| <span class="sourceLineNo">057</span>import org.apache.hbase.thirdparty.org.glassfish.jersey.client.authentication.HttpAuthenticationFeature;<a name="line.57"></a> |
| <span class="sourceLineNo">058</span><a name="line.58"></a> |
| <span class="sourceLineNo">059</span>/**<a name="line.59"></a> |
| <span class="sourceLineNo">060</span> * A ClusterManager implementation designed to control Cloudera Manager (http://www.cloudera.com)<a name="line.60"></a> |
| <span class="sourceLineNo">061</span> * clusters via REST API. This API uses HTTP GET requests against the cluster manager server to<a name="line.61"></a> |
| <span class="sourceLineNo">062</span> * retrieve information and POST/PUT requests to perform actions. As a simple example, to retrieve a<a name="line.62"></a> |
| <span class="sourceLineNo">063</span> * list of hosts from a CM server with login credentials admin:admin, a simple curl command would be<a name="line.63"></a> |
| <span class="sourceLineNo">064</span> * curl -X POST -H "Content-Type:application/json" -u admin:admin \<a name="line.64"></a> |
| <span class="sourceLineNo">065</span> * "http://this.is.my.server.com:7180/api/v8/hosts"<a name="line.65"></a> |
| <span class="sourceLineNo">066</span> *<a name="line.66"></a> |
| <span class="sourceLineNo">067</span> * This command would return a JSON result, which would need to be parsed to retrieve relevant<a name="line.67"></a> |
| <span class="sourceLineNo">068</span> * information. This action and many others are covered by this class.<a name="line.68"></a> |
| <span class="sourceLineNo">069</span> *<a name="line.69"></a> |
| <span class="sourceLineNo">070</span> * A note on nomenclature: while the ClusterManager interface uses a ServiceType enum when<a name="line.70"></a> |
| <span class="sourceLineNo">071</span> * referring to things like RegionServers and DataNodes, cluster managers often use different<a name="line.71"></a> |
| <span class="sourceLineNo">072</span> * terminology. As an example, Cloudera Manager (http://www.cloudera.com) would refer to a<a name="line.72"></a> |
| <span class="sourceLineNo">073</span> * RegionServer as a "role" of the HBase "service." It would further refer to "hbase" as the<a name="line.73"></a> |
| <span class="sourceLineNo">074</span> * "serviceType." Apache Ambari (http://ambari.apache.org) would call the RegionServer a<a name="line.74"></a> |
| <span class="sourceLineNo">075</span> * "component" of the HBase "service."<a name="line.75"></a> |
| <span class="sourceLineNo">076</span> *<a name="line.76"></a> |
| <span class="sourceLineNo">077</span> * This class will defer to the ClusterManager terminology in methods that it implements from<a name="line.77"></a> |
| <span class="sourceLineNo">078</span> * that interface, but uses Cloudera Manager's terminology when dealing with its API directly.<a name="line.78"></a> |
| <span class="sourceLineNo">079</span> *<a name="line.79"></a> |
| <span class="sourceLineNo">080</span> * DEBUG-level logging gives more details of the actions this class takes as they happen. Log at<a name="line.80"></a> |
| <span class="sourceLineNo">081</span> * TRACE-level to see the API requests and responses. TRACE-level logging on RetryCounter displays<a name="line.81"></a> |
| <span class="sourceLineNo">082</span> * wait times, so that can be helpful too.<a name="line.82"></a> |
| <span class="sourceLineNo">083</span> */<a name="line.83"></a> |
| <span class="sourceLineNo">084</span>public class RESTApiClusterManager extends Configured implements ClusterManager {<a name="line.84"></a> |
| <span class="sourceLineNo">085</span> // Properties that need to be in the Configuration object to interact with the REST API cluster<a name="line.85"></a> |
| <span class="sourceLineNo">086</span> // manager. Most easily defined in hbase-site.xml, but can also be passed on the command line.<a name="line.86"></a> |
| <span class="sourceLineNo">087</span> private static final String REST_API_CLUSTER_MANAGER_HOSTNAME =<a name="line.87"></a> |
| <span class="sourceLineNo">088</span> "hbase.it.clustermanager.restapi.hostname";<a name="line.88"></a> |
| <span class="sourceLineNo">089</span> private static final String REST_API_CLUSTER_MANAGER_USERNAME =<a name="line.89"></a> |
| <span class="sourceLineNo">090</span> "hbase.it.clustermanager.restapi.username";<a name="line.90"></a> |
| <span class="sourceLineNo">091</span> private static final String REST_API_CLUSTER_MANAGER_PASSWORD =<a name="line.91"></a> |
| <span class="sourceLineNo">092</span> "hbase.it.clustermanager.restapi.password";<a name="line.92"></a> |
| <span class="sourceLineNo">093</span> private static final String REST_API_CLUSTER_MANAGER_CLUSTER_NAME =<a name="line.93"></a> |
| <span class="sourceLineNo">094</span> "hbase.it.clustermanager.restapi.clustername";<a name="line.94"></a> |
| <span class="sourceLineNo">095</span> private static final String REST_API_DELEGATE_CLUSTER_MANAGER =<a name="line.95"></a> |
| <span class="sourceLineNo">096</span> "hbase.it.clustermanager.restapi.delegate";<a name="line.96"></a> |
| <span class="sourceLineNo">097</span><a name="line.97"></a> |
| <span class="sourceLineNo">098</span> private static final JsonParser parser = new JsonParser();<a name="line.98"></a> |
| <span class="sourceLineNo">099</span><a name="line.99"></a> |
| <span class="sourceLineNo">100</span> // Some default values for the above properties.<a name="line.100"></a> |
| <span class="sourceLineNo">101</span> private static final String DEFAULT_SERVER_HOSTNAME = "http://localhost:7180";<a name="line.101"></a> |
| <span class="sourceLineNo">102</span> private static final String DEFAULT_SERVER_USERNAME = "admin";<a name="line.102"></a> |
| <span class="sourceLineNo">103</span> private static final String DEFAULT_SERVER_PASSWORD = "admin";<a name="line.103"></a> |
| <span class="sourceLineNo">104</span> private static final String DEFAULT_CLUSTER_NAME = "Cluster 1";<a name="line.104"></a> |
| <span class="sourceLineNo">105</span><a name="line.105"></a> |
| <span class="sourceLineNo">106</span> // Fields for the hostname, username, password, and cluster name of the cluster management server<a name="line.106"></a> |
| <span class="sourceLineNo">107</span> // to be used.<a name="line.107"></a> |
| <span class="sourceLineNo">108</span> private String serverHostname;<a name="line.108"></a> |
| <span class="sourceLineNo">109</span> private String clusterName;<a name="line.109"></a> |
| <span class="sourceLineNo">110</span><a name="line.110"></a> |
| <span class="sourceLineNo">111</span> // Each version of Cloudera Manager supports a particular API versions. Version 6 of this API<a name="line.111"></a> |
| <span class="sourceLineNo">112</span> // provides all the features needed by this class.<a name="line.112"></a> |
| <span class="sourceLineNo">113</span> private static final String API_VERSION = "v6";<a name="line.113"></a> |
| <span class="sourceLineNo">114</span><a name="line.114"></a> |
| <span class="sourceLineNo">115</span> // Client instances are expensive, so use the same one for all our REST queries.<a name="line.115"></a> |
| <span class="sourceLineNo">116</span> private final Client client = ClientBuilder.newClient();<a name="line.116"></a> |
| <span class="sourceLineNo">117</span><a name="line.117"></a> |
| <span class="sourceLineNo">118</span> // An instance of HBaseClusterManager is used for methods like the kill, resume, and suspend<a name="line.118"></a> |
| <span class="sourceLineNo">119</span> // because cluster managers don't tend to implement these operations.<a name="line.119"></a> |
| <span class="sourceLineNo">120</span> private ClusterManager hBaseClusterManager;<a name="line.120"></a> |
| <span class="sourceLineNo">121</span><a name="line.121"></a> |
| <span class="sourceLineNo">122</span> private RetryCounterFactory retryCounterFactory;<a name="line.122"></a> |
| <span class="sourceLineNo">123</span><a name="line.123"></a> |
| <span class="sourceLineNo">124</span> private static final Logger LOG = LoggerFactory.getLogger(RESTApiClusterManager.class);<a name="line.124"></a> |
| <span class="sourceLineNo">125</span><a name="line.125"></a> |
| <span class="sourceLineNo">126</span> RESTApiClusterManager() { }<a name="line.126"></a> |
| <span class="sourceLineNo">127</span><a name="line.127"></a> |
| <span class="sourceLineNo">128</span> @Override<a name="line.128"></a> |
| <span class="sourceLineNo">129</span> public void setConf(Configuration conf) {<a name="line.129"></a> |
| <span class="sourceLineNo">130</span> super.setConf(conf);<a name="line.130"></a> |
| <span class="sourceLineNo">131</span> if (conf == null) {<a name="line.131"></a> |
| <span class="sourceLineNo">132</span> // `Configured()` constructor calls `setConf(null)` before calling again with a real value.<a name="line.132"></a> |
| <span class="sourceLineNo">133</span> return;<a name="line.133"></a> |
| <span class="sourceLineNo">134</span> }<a name="line.134"></a> |
| <span class="sourceLineNo">135</span><a name="line.135"></a> |
| <span class="sourceLineNo">136</span> final Class<? extends ClusterManager> clazz = conf.getClass(REST_API_DELEGATE_CLUSTER_MANAGER,<a name="line.136"></a> |
| <span class="sourceLineNo">137</span> HBaseClusterManager.class, ClusterManager.class);<a name="line.137"></a> |
| <span class="sourceLineNo">138</span> hBaseClusterManager = ReflectionUtils.newInstance(clazz, conf);<a name="line.138"></a> |
| <span class="sourceLineNo">139</span><a name="line.139"></a> |
| <span class="sourceLineNo">140</span> serverHostname = conf.get(REST_API_CLUSTER_MANAGER_HOSTNAME, DEFAULT_SERVER_HOSTNAME);<a name="line.140"></a> |
| <span class="sourceLineNo">141</span> clusterName = conf.get(REST_API_CLUSTER_MANAGER_CLUSTER_NAME, DEFAULT_CLUSTER_NAME);<a name="line.141"></a> |
| <span class="sourceLineNo">142</span><a name="line.142"></a> |
| <span class="sourceLineNo">143</span> // Add filter to Client instance to enable server authentication.<a name="line.143"></a> |
| <span class="sourceLineNo">144</span> String serverUsername = conf.get(REST_API_CLUSTER_MANAGER_USERNAME, DEFAULT_SERVER_USERNAME);<a name="line.144"></a> |
| <span class="sourceLineNo">145</span> String serverPassword = conf.get(REST_API_CLUSTER_MANAGER_PASSWORD, DEFAULT_SERVER_PASSWORD);<a name="line.145"></a> |
| <span class="sourceLineNo">146</span> client.register(HttpAuthenticationFeature.basic(serverUsername, serverPassword));<a name="line.146"></a> |
| <span class="sourceLineNo">147</span><a name="line.147"></a> |
| <span class="sourceLineNo">148</span> this.retryCounterFactory = new RetryCounterFactory(new RetryConfig()<a name="line.148"></a> |
| <span class="sourceLineNo">149</span> .setMaxAttempts(conf.getInt(RETRY_ATTEMPTS_KEY, DEFAULT_RETRY_ATTEMPTS))<a name="line.149"></a> |
| <span class="sourceLineNo">150</span> .setSleepInterval(conf.getLong(RETRY_SLEEP_INTERVAL_KEY, DEFAULT_RETRY_SLEEP_INTERVAL)));<a name="line.150"></a> |
| <span class="sourceLineNo">151</span> }<a name="line.151"></a> |
| <span class="sourceLineNo">152</span><a name="line.152"></a> |
| <span class="sourceLineNo">153</span> @Override<a name="line.153"></a> |
| <span class="sourceLineNo">154</span> public void start(ServiceType service, String hostname, int port) {<a name="line.154"></a> |
| <span class="sourceLineNo">155</span> // With Cloudera Manager (6.3.x), sending a START command to a service role<a name="line.155"></a> |
| <span class="sourceLineNo">156</span> // that is already in the "Started" state is an error. CM will log a message<a name="line.156"></a> |
| <span class="sourceLineNo">157</span> // saying "Role must be stopped". It will complain similarly for other<a name="line.157"></a> |
| <span class="sourceLineNo">158</span> // expected state transitions.<a name="line.158"></a> |
| <span class="sourceLineNo">159</span> // A role process that has been `kill -9`'ed ends up with the service role<a name="line.159"></a> |
| <span class="sourceLineNo">160</span> // retaining the "Started" state but with the process marked as "unhealthy".<a name="line.160"></a> |
| <span class="sourceLineNo">161</span> // Instead of blindly issuing the START command, first send a STOP command<a name="line.161"></a> |
| <span class="sourceLineNo">162</span> // to ensure the START will be accepted.<a name="line.162"></a> |
| <span class="sourceLineNo">163</span> LOG.debug("Performing start of {} on {}:{}", service, hostname, port);<a name="line.163"></a> |
| <span class="sourceLineNo">164</span> final RoleState currentState = getRoleState(service, hostname);<a name="line.164"></a> |
| <span class="sourceLineNo">165</span> switch (currentState) {<a name="line.165"></a> |
| <span class="sourceLineNo">166</span> case NA:<a name="line.166"></a> |
| <span class="sourceLineNo">167</span> case BUSY:<a name="line.167"></a> |
| <span class="sourceLineNo">168</span> case UNKNOWN:<a name="line.168"></a> |
| <span class="sourceLineNo">169</span> case HISTORY_NOT_AVAILABLE:<a name="line.169"></a> |
| <span class="sourceLineNo">170</span> LOG.warn("Unexpected service state detected. Service START requested, but currently in"<a name="line.170"></a> |
| <span class="sourceLineNo">171</span> + " {} state. Attempting to start. {}, {}:{}", currentState, service, hostname, port);<a name="line.171"></a> |
| <span class="sourceLineNo">172</span> performClusterManagerCommand(service, hostname, RoleCommand.START);<a name="line.172"></a> |
| <span class="sourceLineNo">173</span> return;<a name="line.173"></a> |
| <span class="sourceLineNo">174</span> case STOPPING:<a name="line.174"></a> |
| <span class="sourceLineNo">175</span> LOG.warn("Unexpected service state detected. Service START requested, but currently in"<a name="line.175"></a> |
| <span class="sourceLineNo">176</span> + " {} state. Waiting for stop before attempting start. {}, {}:{}", currentState,<a name="line.176"></a> |
| <span class="sourceLineNo">177</span> service, hostname, port);<a name="line.177"></a> |
| <span class="sourceLineNo">178</span> waitFor(() -> Objects.equals(RoleState.STOPPED, getRoleState(service, hostname)));<a name="line.178"></a> |
| <span class="sourceLineNo">179</span> performClusterManagerCommand(service, hostname, RoleCommand.START);<a name="line.179"></a> |
| <span class="sourceLineNo">180</span> return;<a name="line.180"></a> |
| <span class="sourceLineNo">181</span> case STOPPED:<a name="line.181"></a> |
| <span class="sourceLineNo">182</span> performClusterManagerCommand(service, hostname, RoleCommand.START);<a name="line.182"></a> |
| <span class="sourceLineNo">183</span> return;<a name="line.183"></a> |
| <span class="sourceLineNo">184</span> case STARTING:<a name="line.184"></a> |
| <span class="sourceLineNo">185</span> LOG.warn("Unexpected service state detected. Service START requested, but already in"<a name="line.185"></a> |
| <span class="sourceLineNo">186</span> + " {} state. Ignoring current request and waiting for start to complete. {}, {}:{}",<a name="line.186"></a> |
| <span class="sourceLineNo">187</span> currentState, service, hostname, port);<a name="line.187"></a> |
| <span class="sourceLineNo">188</span> waitFor(()-> Objects.equals(RoleState.STARTED, getRoleState(service, hostname)));<a name="line.188"></a> |
| <span class="sourceLineNo">189</span> return;<a name="line.189"></a> |
| <span class="sourceLineNo">190</span> case STARTED:<a name="line.190"></a> |
| <span class="sourceLineNo">191</span> LOG.warn("Unexpected service state detected. Service START requested, but already in"<a name="line.191"></a> |
| <span class="sourceLineNo">192</span> + " {} state. Restarting. {}, {}:{}", currentState, service, hostname, port);<a name="line.192"></a> |
| <span class="sourceLineNo">193</span> performClusterManagerCommand(service, hostname, RoleCommand.RESTART);<a name="line.193"></a> |
| <span class="sourceLineNo">194</span> return;<a name="line.194"></a> |
| <span class="sourceLineNo">195</span> }<a name="line.195"></a> |
| <span class="sourceLineNo">196</span> throw new RuntimeException("should not happen.");<a name="line.196"></a> |
| <span class="sourceLineNo">197</span> }<a name="line.197"></a> |
| <span class="sourceLineNo">198</span><a name="line.198"></a> |
| <span class="sourceLineNo">199</span> @Override<a name="line.199"></a> |
| <span class="sourceLineNo">200</span> public void stop(ServiceType service, String hostname, int port) {<a name="line.200"></a> |
| <span class="sourceLineNo">201</span> LOG.debug("Performing stop of {} on {}:{}", service, hostname, port);<a name="line.201"></a> |
| <span class="sourceLineNo">202</span> final RoleState currentState = getRoleState(service, hostname);<a name="line.202"></a> |
| <span class="sourceLineNo">203</span> switch (currentState) {<a name="line.203"></a> |
| <span class="sourceLineNo">204</span> case NA:<a name="line.204"></a> |
| <span class="sourceLineNo">205</span> case BUSY:<a name="line.205"></a> |
| <span class="sourceLineNo">206</span> case UNKNOWN:<a name="line.206"></a> |
| <span class="sourceLineNo">207</span> case HISTORY_NOT_AVAILABLE:<a name="line.207"></a> |
| <span class="sourceLineNo">208</span> LOG.warn("Unexpected service state detected. Service STOP requested, but already in"<a name="line.208"></a> |
| <span class="sourceLineNo">209</span> + " {} state. Attempting to stop. {}, {}:{}", currentState, service, hostname, port);<a name="line.209"></a> |
| <span class="sourceLineNo">210</span> performClusterManagerCommand(service, hostname, RoleCommand.STOP);<a name="line.210"></a> |
| <span class="sourceLineNo">211</span> return;<a name="line.211"></a> |
| <span class="sourceLineNo">212</span> case STOPPING:<a name="line.212"></a> |
| <span class="sourceLineNo">213</span> waitFor(() -> Objects.equals(RoleState.STOPPED, getRoleState(service, hostname)));<a name="line.213"></a> |
| <span class="sourceLineNo">214</span> return;<a name="line.214"></a> |
| <span class="sourceLineNo">215</span> case STOPPED:<a name="line.215"></a> |
| <span class="sourceLineNo">216</span> LOG.warn("Unexpected service state detected. Service STOP requested, but already in"<a name="line.216"></a> |
| <span class="sourceLineNo">217</span> + " {} state. Ignoring current request. {}, {}:{}", currentState, service, hostname,<a name="line.217"></a> |
| <span class="sourceLineNo">218</span> port);<a name="line.218"></a> |
| <span class="sourceLineNo">219</span> return;<a name="line.219"></a> |
| <span class="sourceLineNo">220</span> case STARTING:<a name="line.220"></a> |
| <span class="sourceLineNo">221</span> LOG.warn("Unexpected service state detected. Service STOP requested, but already in"<a name="line.221"></a> |
| <span class="sourceLineNo">222</span> + " {} state. Waiting for start to complete. {}, {}:{}", currentState, service, hostname,<a name="line.222"></a> |
| <span class="sourceLineNo">223</span> port);<a name="line.223"></a> |
| <span class="sourceLineNo">224</span> waitFor(()-> Objects.equals(RoleState.STARTED, getRoleState(service, hostname)));<a name="line.224"></a> |
| <span class="sourceLineNo">225</span> performClusterManagerCommand(service, hostname, RoleCommand.STOP);<a name="line.225"></a> |
| <span class="sourceLineNo">226</span> return;<a name="line.226"></a> |
| <span class="sourceLineNo">227</span> case STARTED:<a name="line.227"></a> |
| <span class="sourceLineNo">228</span> performClusterManagerCommand(service, hostname, RoleCommand.STOP);<a name="line.228"></a> |
| <span class="sourceLineNo">229</span> return;<a name="line.229"></a> |
| <span class="sourceLineNo">230</span> }<a name="line.230"></a> |
| <span class="sourceLineNo">231</span> throw new RuntimeException("should not happen.");<a name="line.231"></a> |
| <span class="sourceLineNo">232</span> }<a name="line.232"></a> |
| <span class="sourceLineNo">233</span><a name="line.233"></a> |
| <span class="sourceLineNo">234</span> @Override<a name="line.234"></a> |
| <span class="sourceLineNo">235</span> public void restart(ServiceType service, String hostname, int port) {<a name="line.235"></a> |
| <span class="sourceLineNo">236</span> LOG.debug("Performing stop followed by start of {} on {}:{}", service, hostname, port);<a name="line.236"></a> |
| <span class="sourceLineNo">237</span> stop(service, hostname, port);<a name="line.237"></a> |
| <span class="sourceLineNo">238</span> start(service, hostname, port);<a name="line.238"></a> |
| <span class="sourceLineNo">239</span> }<a name="line.239"></a> |
| <span class="sourceLineNo">240</span><a name="line.240"></a> |
| <span class="sourceLineNo">241</span> @Override<a name="line.241"></a> |
| <span class="sourceLineNo">242</span> public boolean isRunning(ServiceType service, String hostname, int port) {<a name="line.242"></a> |
| <span class="sourceLineNo">243</span> LOG.debug("Issuing isRunning request against {} on {}:{}", service, hostname, port);<a name="line.243"></a> |
| <span class="sourceLineNo">244</span> return executeWithRetries(() -> {<a name="line.244"></a> |
| <span class="sourceLineNo">245</span> String serviceName = getServiceName(roleServiceType.get(service));<a name="line.245"></a> |
| <span class="sourceLineNo">246</span> String hostId = getHostId(hostname);<a name="line.246"></a> |
| <span class="sourceLineNo">247</span> RoleState roleState = getRoleState(serviceName, service.toString(), hostId);<a name="line.247"></a> |
| <span class="sourceLineNo">248</span> HealthSummary healthSummary = getHealthSummary(serviceName, service.toString(), hostId);<a name="line.248"></a> |
| <span class="sourceLineNo">249</span> return Objects.equals(RoleState.STARTED, roleState)<a name="line.249"></a> |
| <span class="sourceLineNo">250</span> && Objects.equals(HealthSummary.GOOD, healthSummary);<a name="line.250"></a> |
| <span class="sourceLineNo">251</span> });<a name="line.251"></a> |
| <span class="sourceLineNo">252</span> }<a name="line.252"></a> |
| <span class="sourceLineNo">253</span><a name="line.253"></a> |
| <span class="sourceLineNo">254</span> @Override<a name="line.254"></a> |
| <span class="sourceLineNo">255</span> public void kill(ServiceType service, String hostname, int port) throws IOException {<a name="line.255"></a> |
| <span class="sourceLineNo">256</span> hBaseClusterManager.kill(service, hostname, port);<a name="line.256"></a> |
| <span class="sourceLineNo">257</span> }<a name="line.257"></a> |
| <span class="sourceLineNo">258</span><a name="line.258"></a> |
| <span class="sourceLineNo">259</span> @Override<a name="line.259"></a> |
| <span class="sourceLineNo">260</span> public void suspend(ServiceType service, String hostname, int port) throws IOException {<a name="line.260"></a> |
| <span class="sourceLineNo">261</span> hBaseClusterManager.suspend(service, hostname, port);<a name="line.261"></a> |
| <span class="sourceLineNo">262</span> }<a name="line.262"></a> |
| <span class="sourceLineNo">263</span><a name="line.263"></a> |
| <span class="sourceLineNo">264</span> @Override<a name="line.264"></a> |
| <span class="sourceLineNo">265</span> public void resume(ServiceType service, String hostname, int port) throws IOException {<a name="line.265"></a> |
| <span class="sourceLineNo">266</span> hBaseClusterManager.resume(service, hostname, port);<a name="line.266"></a> |
| <span class="sourceLineNo">267</span> }<a name="line.267"></a> |
| <span class="sourceLineNo">268</span><a name="line.268"></a> |
| <span class="sourceLineNo">269</span> // Convenience method to execute command against role on hostname. Only graceful commands are<a name="line.269"></a> |
| <span class="sourceLineNo">270</span> // supported since cluster management APIs don't tend to let you SIGKILL things.<a name="line.270"></a> |
| <span class="sourceLineNo">271</span> private void performClusterManagerCommand(ServiceType role, String hostname,<a name="line.271"></a> |
| <span class="sourceLineNo">272</span> RoleCommand command) {<a name="line.272"></a> |
| <span class="sourceLineNo">273</span> // retry submitting the command until the submission succeeds.<a name="line.273"></a> |
| <span class="sourceLineNo">274</span> final long commandId = executeWithRetries(() -> {<a name="line.274"></a> |
| <span class="sourceLineNo">275</span> final String serviceName = getServiceName(roleServiceType.get(role));<a name="line.275"></a> |
| <span class="sourceLineNo">276</span> final String hostId = getHostId(hostname);<a name="line.276"></a> |
| <span class="sourceLineNo">277</span> final String roleName = getRoleName(serviceName, role.toString(), hostId);<a name="line.277"></a> |
| <span class="sourceLineNo">278</span> return doRoleCommand(serviceName, roleName, command);<a name="line.278"></a> |
| <span class="sourceLineNo">279</span> });<a name="line.279"></a> |
| <span class="sourceLineNo">280</span> LOG.debug("Command {} of {} on {} submitted as commandId {}",<a name="line.280"></a> |
| <span class="sourceLineNo">281</span> command, role, hostname, commandId);<a name="line.281"></a> |
| <span class="sourceLineNo">282</span><a name="line.282"></a> |
| <span class="sourceLineNo">283</span> // assume the submitted command was asynchronous. wait on the commandId to be marked as<a name="line.283"></a> |
| <span class="sourceLineNo">284</span> // successful.<a name="line.284"></a> |
| <span class="sourceLineNo">285</span> waitFor(() -> hasCommandCompleted(commandId));<a name="line.285"></a> |
| <span class="sourceLineNo">286</span> if (!executeWithRetries(() -> hasCommandCompletedSuccessfully(commandId))) {<a name="line.286"></a> |
| <span class="sourceLineNo">287</span> final String msg = String.format("Command %s of %s on %s submitted as commandId %s failed.",<a name="line.287"></a> |
| <span class="sourceLineNo">288</span> command, role, hostname, commandId);<a name="line.288"></a> |
| <span class="sourceLineNo">289</span> // TODO: this does not interrupt the monkey. should it?<a name="line.289"></a> |
| <span class="sourceLineNo">290</span> throw new RuntimeException(msg);<a name="line.290"></a> |
| <span class="sourceLineNo">291</span> }<a name="line.291"></a> |
| <span class="sourceLineNo">292</span> LOG.debug("Command {} of {} on {} submitted as commandId {} completed successfully.",<a name="line.292"></a> |
| <span class="sourceLineNo">293</span> command, role, hostname, commandId);<a name="line.293"></a> |
| <span class="sourceLineNo">294</span> }<a name="line.294"></a> |
| <span class="sourceLineNo">295</span><a name="line.295"></a> |
| <span class="sourceLineNo">296</span> /**<a name="line.296"></a> |
| <span class="sourceLineNo">297</span> * Issues a command (e.g. starting or stopping a role).<a name="line.297"></a> |
| <span class="sourceLineNo">298</span> * @return the commandId of a successfully submitted asynchronous command.<a name="line.298"></a> |
| <span class="sourceLineNo">299</span> */<a name="line.299"></a> |
| <span class="sourceLineNo">300</span> private long doRoleCommand(String serviceName, String roleName, RoleCommand roleCommand) {<a name="line.300"></a> |
| <span class="sourceLineNo">301</span> URI uri = UriBuilder.fromUri(serverHostname)<a name="line.301"></a> |
| <span class="sourceLineNo">302</span> .path("api")<a name="line.302"></a> |
| <span class="sourceLineNo">303</span> .path(API_VERSION)<a name="line.303"></a> |
| <span class="sourceLineNo">304</span> .path("clusters")<a name="line.304"></a> |
| <span class="sourceLineNo">305</span> .path(clusterName)<a name="line.305"></a> |
| <span class="sourceLineNo">306</span> .path("services")<a name="line.306"></a> |
| <span class="sourceLineNo">307</span> .path(serviceName)<a name="line.307"></a> |
| <span class="sourceLineNo">308</span> .path("roleCommands")<a name="line.308"></a> |
| <span class="sourceLineNo">309</span> .path(roleCommand.toString())<a name="line.309"></a> |
| <span class="sourceLineNo">310</span> .build();<a name="line.310"></a> |
| <span class="sourceLineNo">311</span> String body = "{ \"items\": [ \"" + roleName + "\" ] }";<a name="line.311"></a> |
| <span class="sourceLineNo">312</span> LOG.trace("Executing POST against {} with body {} ...", uri, body);<a name="line.312"></a> |
| <span class="sourceLineNo">313</span> WebTarget webTarget = client.target(uri);<a name="line.313"></a> |
| <span class="sourceLineNo">314</span> Invocation.Builder invocationBuilder = webTarget.request(MediaType.APPLICATION_JSON);<a name="line.314"></a> |
| <span class="sourceLineNo">315</span> Response response = invocationBuilder.post(Entity.json(body));<a name="line.315"></a> |
| <span class="sourceLineNo">316</span> final int statusCode = response.getStatus();<a name="line.316"></a> |
| <span class="sourceLineNo">317</span> final String responseBody = response.readEntity(String.class);<a name="line.317"></a> |
| <span class="sourceLineNo">318</span> if (statusCode != Response.Status.OK.getStatusCode()) {<a name="line.318"></a> |
| <span class="sourceLineNo">319</span> LOG.warn(<a name="line.319"></a> |
| <span class="sourceLineNo">320</span> "RoleCommand failed with status code {} and response body {}", statusCode, responseBody);<a name="line.320"></a> |
| <span class="sourceLineNo">321</span> throw new HTTPException(statusCode);<a name="line.321"></a> |
| <span class="sourceLineNo">322</span> }<a name="line.322"></a> |
| <span class="sourceLineNo">323</span><a name="line.323"></a> |
| <span class="sourceLineNo">324</span> LOG.trace("POST against {} completed with status code {} and response body {}",<a name="line.324"></a> |
| <span class="sourceLineNo">325</span> uri, statusCode, responseBody);<a name="line.325"></a> |
| <span class="sourceLineNo">326</span> return parser.parse(responseBody)<a name="line.326"></a> |
| <span class="sourceLineNo">327</span> .getAsJsonObject()<a name="line.327"></a> |
| <span class="sourceLineNo">328</span> .get("items")<a name="line.328"></a> |
| <span class="sourceLineNo">329</span> .getAsJsonArray()<a name="line.329"></a> |
| <span class="sourceLineNo">330</span> .get(0)<a name="line.330"></a> |
| <span class="sourceLineNo">331</span> .getAsJsonObject()<a name="line.331"></a> |
| <span class="sourceLineNo">332</span> .get("id")<a name="line.332"></a> |
| <span class="sourceLineNo">333</span> .getAsLong();<a name="line.333"></a> |
| <span class="sourceLineNo">334</span> }<a name="line.334"></a> |
| <span class="sourceLineNo">335</span><a name="line.335"></a> |
| <span class="sourceLineNo">336</span> private HealthSummary getHealthSummary(String serviceName, String roleType, String hostId) {<a name="line.336"></a> |
| <span class="sourceLineNo">337</span> return HealthSummary.fromString(<a name="line.337"></a> |
| <span class="sourceLineNo">338</span> getRolePropertyValue(serviceName, roleType, hostId, "healthSummary"));<a name="line.338"></a> |
| <span class="sourceLineNo">339</span> }<a name="line.339"></a> |
| <span class="sourceLineNo">340</span><a name="line.340"></a> |
| <span class="sourceLineNo">341</span> // This API uses a hostId to execute host-specific commands; get one from a hostname.<a name="line.341"></a> |
| <span class="sourceLineNo">342</span> private String getHostId(String hostname) {<a name="line.342"></a> |
| <span class="sourceLineNo">343</span> String hostId = null;<a name="line.343"></a> |
| <span class="sourceLineNo">344</span> URI uri = UriBuilder.fromUri(serverHostname)<a name="line.344"></a> |
| <span class="sourceLineNo">345</span> .path("api")<a name="line.345"></a> |
| <span class="sourceLineNo">346</span> .path(API_VERSION)<a name="line.346"></a> |
| <span class="sourceLineNo">347</span> .path("hosts")<a name="line.347"></a> |
| <span class="sourceLineNo">348</span> .build();<a name="line.348"></a> |
| <span class="sourceLineNo">349</span> JsonElement hosts = parser.parse(getFromURIGet(uri))<a name="line.349"></a> |
| <span class="sourceLineNo">350</span> .getAsJsonObject()<a name="line.350"></a> |
| <span class="sourceLineNo">351</span> .get("items");<a name="line.351"></a> |
| <span class="sourceLineNo">352</span> if (hosts != null) {<a name="line.352"></a> |
| <span class="sourceLineNo">353</span> // Iterate through the list of hosts, stopping once you've reached the requested hostname.<a name="line.353"></a> |
| <span class="sourceLineNo">354</span> for (JsonElement host : hosts.getAsJsonArray()) {<a name="line.354"></a> |
| <span class="sourceLineNo">355</span> if (host.getAsJsonObject().get("hostname").getAsString().equals(hostname)) {<a name="line.355"></a> |
| <span class="sourceLineNo">356</span> hostId = host.getAsJsonObject().get("hostId").getAsString();<a name="line.356"></a> |
| <span class="sourceLineNo">357</span> break;<a name="line.357"></a> |
| <span class="sourceLineNo">358</span> }<a name="line.358"></a> |
| <span class="sourceLineNo">359</span> }<a name="line.359"></a> |
| <span class="sourceLineNo">360</span> }<a name="line.360"></a> |
| <span class="sourceLineNo">361</span><a name="line.361"></a> |
| <span class="sourceLineNo">362</span> return hostId;<a name="line.362"></a> |
| <span class="sourceLineNo">363</span> }<a name="line.363"></a> |
| <span class="sourceLineNo">364</span><a name="line.364"></a> |
| <span class="sourceLineNo">365</span> private String getFromURIGet(URI uri) {<a name="line.365"></a> |
| <span class="sourceLineNo">366</span> LOG.trace("Executing GET against {} ...", uri);<a name="line.366"></a> |
| <span class="sourceLineNo">367</span> final Response response = client.target(uri)<a name="line.367"></a> |
| <span class="sourceLineNo">368</span> .request(MediaType.APPLICATION_JSON_TYPE)<a name="line.368"></a> |
| <span class="sourceLineNo">369</span> .get();<a name="line.369"></a> |
| <span class="sourceLineNo">370</span> int statusCode = response.getStatus();<a name="line.370"></a> |
| <span class="sourceLineNo">371</span> final String responseBody = response.readEntity(String.class);<a name="line.371"></a> |
| <span class="sourceLineNo">372</span> if (statusCode != Response.Status.OK.getStatusCode()) {<a name="line.372"></a> |
| <span class="sourceLineNo">373</span> LOG.warn(<a name="line.373"></a> |
| <span class="sourceLineNo">374</span> "request failed with status code {} and response body {}", statusCode, responseBody);<a name="line.374"></a> |
| <span class="sourceLineNo">375</span> throw new HTTPException(statusCode);<a name="line.375"></a> |
| <span class="sourceLineNo">376</span> }<a name="line.376"></a> |
| <span class="sourceLineNo">377</span> // This API folds information as the value to an "items" attribute.<a name="line.377"></a> |
| <span class="sourceLineNo">378</span> LOG.trace("GET against {} completed with status code {} and response body {}",<a name="line.378"></a> |
| <span class="sourceLineNo">379</span> uri, statusCode, responseBody);<a name="line.379"></a> |
| <span class="sourceLineNo">380</span> return responseBody;<a name="line.380"></a> |
| <span class="sourceLineNo">381</span> }<a name="line.381"></a> |
| <span class="sourceLineNo">382</span><a name="line.382"></a> |
| <span class="sourceLineNo">383</span> // This API assigns a unique role name to each host's instance of a role.<a name="line.383"></a> |
| <span class="sourceLineNo">384</span> private String getRoleName(String serviceName, String roleType, String hostId) {<a name="line.384"></a> |
| <span class="sourceLineNo">385</span> return getRolePropertyValue(serviceName, roleType, hostId, "name");<a name="line.385"></a> |
| <span class="sourceLineNo">386</span> }<a name="line.386"></a> |
| <span class="sourceLineNo">387</span><a name="line.387"></a> |
| <span class="sourceLineNo">388</span> // Get the value of a property from a role on a particular host.<a name="line.388"></a> |
| <span class="sourceLineNo">389</span> private String getRolePropertyValue(String serviceName, String roleType, String hostId,<a name="line.389"></a> |
| <span class="sourceLineNo">390</span> String property) {<a name="line.390"></a> |
| <span class="sourceLineNo">391</span> String roleValue = null;<a name="line.391"></a> |
| <span class="sourceLineNo">392</span> URI uri = UriBuilder.fromUri(serverHostname)<a name="line.392"></a> |
| <span class="sourceLineNo">393</span> .path("api")<a name="line.393"></a> |
| <span class="sourceLineNo">394</span> .path(API_VERSION)<a name="line.394"></a> |
| <span class="sourceLineNo">395</span> .path("clusters")<a name="line.395"></a> |
| <span class="sourceLineNo">396</span> .path(clusterName)<a name="line.396"></a> |
| <span class="sourceLineNo">397</span> .path("services")<a name="line.397"></a> |
| <span class="sourceLineNo">398</span> .path(serviceName)<a name="line.398"></a> |
| <span class="sourceLineNo">399</span> .path("roles")<a name="line.399"></a> |
| <span class="sourceLineNo">400</span> .build();<a name="line.400"></a> |
| <span class="sourceLineNo">401</span> JsonElement roles = parser.parse(getFromURIGet(uri))<a name="line.401"></a> |
| <span class="sourceLineNo">402</span> .getAsJsonObject()<a name="line.402"></a> |
| <span class="sourceLineNo">403</span> .get("items");<a name="line.403"></a> |
| <span class="sourceLineNo">404</span> if (roles != null) {<a name="line.404"></a> |
| <span class="sourceLineNo">405</span> // Iterate through the list of roles, stopping once the requested one is found.<a name="line.405"></a> |
| <span class="sourceLineNo">406</span> for (JsonElement role : roles.getAsJsonArray()) {<a name="line.406"></a> |
| <span class="sourceLineNo">407</span> JsonObject roleObj = role.getAsJsonObject();<a name="line.407"></a> |
| <span class="sourceLineNo">408</span> if (roleObj.get("hostRef").getAsJsonObject().get("hostId").getAsString().equals(hostId) &&<a name="line.408"></a> |
| <span class="sourceLineNo">409</span> roleObj.get("type").getAsString().toLowerCase(Locale.ROOT)<a name="line.409"></a> |
| <span class="sourceLineNo">410</span> .equals(roleType.toLowerCase(Locale.ROOT))) {<a name="line.410"></a> |
| <span class="sourceLineNo">411</span> roleValue = roleObj.get(property).getAsString();<a name="line.411"></a> |
| <span class="sourceLineNo">412</span> break;<a name="line.412"></a> |
| <span class="sourceLineNo">413</span> }<a name="line.413"></a> |
| <span class="sourceLineNo">414</span> }<a name="line.414"></a> |
| <span class="sourceLineNo">415</span> }<a name="line.415"></a> |
| <span class="sourceLineNo">416</span><a name="line.416"></a> |
| <span class="sourceLineNo">417</span> return roleValue;<a name="line.417"></a> |
| <span class="sourceLineNo">418</span> }<a name="line.418"></a> |
| <span class="sourceLineNo">419</span><a name="line.419"></a> |
| <span class="sourceLineNo">420</span> private RoleState getRoleState(ServiceType service, String hostname) {<a name="line.420"></a> |
| <span class="sourceLineNo">421</span> return executeWithRetries(() -> {<a name="line.421"></a> |
| <span class="sourceLineNo">422</span> String serviceName = getServiceName(roleServiceType.get(service));<a name="line.422"></a> |
| <span class="sourceLineNo">423</span> String hostId = getHostId(hostname);<a name="line.423"></a> |
| <span class="sourceLineNo">424</span> RoleState state = getRoleState(serviceName, service.toString(), hostId);<a name="line.424"></a> |
| <span class="sourceLineNo">425</span> // sometimes the response (usually the first) is null. retry those.<a name="line.425"></a> |
| <span class="sourceLineNo">426</span> return Objects.requireNonNull(state);<a name="line.426"></a> |
| <span class="sourceLineNo">427</span> });<a name="line.427"></a> |
| <span class="sourceLineNo">428</span> }<a name="line.428"></a> |
| <span class="sourceLineNo">429</span><a name="line.429"></a> |
| <span class="sourceLineNo">430</span> private RoleState getRoleState(String serviceName, String roleType, String hostId) {<a name="line.430"></a> |
| <span class="sourceLineNo">431</span> return RoleState.fromString(<a name="line.431"></a> |
| <span class="sourceLineNo">432</span> getRolePropertyValue(serviceName, roleType, hostId, "roleState"));<a name="line.432"></a> |
| <span class="sourceLineNo">433</span> }<a name="line.433"></a> |
| <span class="sourceLineNo">434</span><a name="line.434"></a> |
| <span class="sourceLineNo">435</span> // Convert a service (e.g. "HBASE," "HDFS") into a service name (e.g. "HBASE-1," "HDFS-1").<a name="line.435"></a> |
| <span class="sourceLineNo">436</span> private String getServiceName(Service service) {<a name="line.436"></a> |
| <span class="sourceLineNo">437</span> String serviceName = null;<a name="line.437"></a> |
| <span class="sourceLineNo">438</span> URI uri = UriBuilder.fromUri(serverHostname).path("api").path(API_VERSION).path("clusters")<a name="line.438"></a> |
| <span class="sourceLineNo">439</span> .path(clusterName).path("services").build();<a name="line.439"></a> |
| <span class="sourceLineNo">440</span> JsonElement services = parser.parse(getFromURIGet(uri))<a name="line.440"></a> |
| <span class="sourceLineNo">441</span> .getAsJsonObject()<a name="line.441"></a> |
| <span class="sourceLineNo">442</span> .get("items");<a name="line.442"></a> |
| <span class="sourceLineNo">443</span> if (services != null) {<a name="line.443"></a> |
| <span class="sourceLineNo">444</span> // Iterate through the list of services, stopping once the requested one is found.<a name="line.444"></a> |
| <span class="sourceLineNo">445</span> for (JsonElement serviceEntry : services.getAsJsonArray()) {<a name="line.445"></a> |
| <span class="sourceLineNo">446</span> if (serviceEntry.getAsJsonObject().get("type").getAsString().equals(service.toString())) {<a name="line.446"></a> |
| <span class="sourceLineNo">447</span> serviceName = serviceEntry.getAsJsonObject().get("name").getAsString();<a name="line.447"></a> |
| <span class="sourceLineNo">448</span> break;<a name="line.448"></a> |
| <span class="sourceLineNo">449</span> }<a name="line.449"></a> |
| <span class="sourceLineNo">450</span> }<a name="line.450"></a> |
| <span class="sourceLineNo">451</span> }<a name="line.451"></a> |
| <span class="sourceLineNo">452</span><a name="line.452"></a> |
| <span class="sourceLineNo">453</span> return serviceName;<a name="line.453"></a> |
| <span class="sourceLineNo">454</span> }<a name="line.454"></a> |
| <span class="sourceLineNo">455</span><a name="line.455"></a> |
| <span class="sourceLineNo">456</span> private Optional<JsonObject> getCommand(final long commandId) {<a name="line.456"></a> |
| <span class="sourceLineNo">457</span> final URI uri = UriBuilder.fromUri(serverHostname)<a name="line.457"></a> |
| <span class="sourceLineNo">458</span> .path("api")<a name="line.458"></a> |
| <span class="sourceLineNo">459</span> .path(API_VERSION)<a name="line.459"></a> |
| <span class="sourceLineNo">460</span> .path("commands")<a name="line.460"></a> |
| <span class="sourceLineNo">461</span> .path(Long.toString(commandId))<a name="line.461"></a> |
| <span class="sourceLineNo">462</span> .build();<a name="line.462"></a> |
| <span class="sourceLineNo">463</span> return Optional.ofNullable(getFromURIGet(uri))<a name="line.463"></a> |
| <span class="sourceLineNo">464</span> .map(parser::parse)<a name="line.464"></a> |
| <span class="sourceLineNo">465</span> .map(JsonElement::getAsJsonObject);<a name="line.465"></a> |
| <span class="sourceLineNo">466</span> }<a name="line.466"></a> |
| <span class="sourceLineNo">467</span><a name="line.467"></a> |
| <span class="sourceLineNo">468</span> /**<a name="line.468"></a> |
| <span class="sourceLineNo">469</span> * Return {@code true} if the {@code commandId} has finished processing.<a name="line.469"></a> |
| <span class="sourceLineNo">470</span> */<a name="line.470"></a> |
| <span class="sourceLineNo">471</span> private boolean hasCommandCompleted(final long commandId) {<a name="line.471"></a> |
| <span class="sourceLineNo">472</span> return getCommand(commandId)<a name="line.472"></a> |
| <span class="sourceLineNo">473</span> .map(val -> {<a name="line.473"></a> |
| <span class="sourceLineNo">474</span> final boolean isActive = val.get("active").getAsBoolean();<a name="line.474"></a> |
| <span class="sourceLineNo">475</span> if (isActive) {<a name="line.475"></a> |
| <span class="sourceLineNo">476</span> LOG.debug("command {} is still active.", commandId);<a name="line.476"></a> |
| <span class="sourceLineNo">477</span> }<a name="line.477"></a> |
| <span class="sourceLineNo">478</span> return !isActive;<a name="line.478"></a> |
| <span class="sourceLineNo">479</span> })<a name="line.479"></a> |
| <span class="sourceLineNo">480</span> .orElse(false);<a name="line.480"></a> |
| <span class="sourceLineNo">481</span> }<a name="line.481"></a> |
| <span class="sourceLineNo">482</span><a name="line.482"></a> |
| <span class="sourceLineNo">483</span> /**<a name="line.483"></a> |
| <span class="sourceLineNo">484</span> * Return {@code true} if the {@code commandId} has finished successfully.<a name="line.484"></a> |
| <span class="sourceLineNo">485</span> */<a name="line.485"></a> |
| <span class="sourceLineNo">486</span> private boolean hasCommandCompletedSuccessfully(final long commandId) {<a name="line.486"></a> |
| <span class="sourceLineNo">487</span> return getCommand(commandId)<a name="line.487"></a> |
| <span class="sourceLineNo">488</span> .filter(val -> {<a name="line.488"></a> |
| <span class="sourceLineNo">489</span> final boolean isActive = val.get("active").getAsBoolean();<a name="line.489"></a> |
| <span class="sourceLineNo">490</span> if (isActive) {<a name="line.490"></a> |
| <span class="sourceLineNo">491</span> LOG.debug("command {} is still active.", commandId);<a name="line.491"></a> |
| <span class="sourceLineNo">492</span> }<a name="line.492"></a> |
| <span class="sourceLineNo">493</span> return !isActive;<a name="line.493"></a> |
| <span class="sourceLineNo">494</span> })<a name="line.494"></a> |
| <span class="sourceLineNo">495</span> .map(val -> {<a name="line.495"></a> |
| <span class="sourceLineNo">496</span> final boolean isSuccess = val.get("success").getAsBoolean();<a name="line.496"></a> |
| <span class="sourceLineNo">497</span> LOG.debug("command {} completed as {}.", commandId, isSuccess);<a name="line.497"></a> |
| <span class="sourceLineNo">498</span> return isSuccess;<a name="line.498"></a> |
| <span class="sourceLineNo">499</span> })<a name="line.499"></a> |
| <span class="sourceLineNo">500</span> .orElse(false);<a name="line.500"></a> |
| <span class="sourceLineNo">501</span> }<a name="line.501"></a> |
| <span class="sourceLineNo">502</span><a name="line.502"></a> |
| <span class="sourceLineNo">503</span> /**<a name="line.503"></a> |
| <span class="sourceLineNo">504</span> * Helper method for executing retryable work.<a name="line.504"></a> |
| <span class="sourceLineNo">505</span> */<a name="line.505"></a> |
| <span class="sourceLineNo">506</span> private <T> T executeWithRetries(final Callable<T> callable) {<a name="line.506"></a> |
| <span class="sourceLineNo">507</span> final RetryCounter retryCounter = retryCounterFactory.create();<a name="line.507"></a> |
| <span class="sourceLineNo">508</span> while (true) {<a name="line.508"></a> |
| <span class="sourceLineNo">509</span> try {<a name="line.509"></a> |
| <span class="sourceLineNo">510</span> return callable.call();<a name="line.510"></a> |
| <span class="sourceLineNo">511</span> } catch (Exception e) {<a name="line.511"></a> |
| <span class="sourceLineNo">512</span> if (retryCounter.shouldRetry()) {<a name="line.512"></a> |
| <span class="sourceLineNo">513</span> LOG.debug("execution failed with exception. Retrying.", e);<a name="line.513"></a> |
| <span class="sourceLineNo">514</span> } else {<a name="line.514"></a> |
| <span class="sourceLineNo">515</span> throw new RuntimeException("retries exhausted", e);<a name="line.515"></a> |
| <span class="sourceLineNo">516</span> }<a name="line.516"></a> |
| <span class="sourceLineNo">517</span> }<a name="line.517"></a> |
| <span class="sourceLineNo">518</span> try {<a name="line.518"></a> |
| <span class="sourceLineNo">519</span> retryCounter.sleepUntilNextRetry();<a name="line.519"></a> |
| <span class="sourceLineNo">520</span> } catch (InterruptedException e) {<a name="line.520"></a> |
| <span class="sourceLineNo">521</span> throw new RuntimeException(e);<a name="line.521"></a> |
| <span class="sourceLineNo">522</span> }<a name="line.522"></a> |
| <span class="sourceLineNo">523</span> }<a name="line.523"></a> |
| <span class="sourceLineNo">524</span> }<a name="line.524"></a> |
| <span class="sourceLineNo">525</span><a name="line.525"></a> |
| <span class="sourceLineNo">526</span> private void waitFor(final Callable<Boolean> predicate) {<a name="line.526"></a> |
| <span class="sourceLineNo">527</span> final RetryCounter retryCounter = retryCounterFactory.create();<a name="line.527"></a> |
| <span class="sourceLineNo">528</span> while (true) {<a name="line.528"></a> |
| <span class="sourceLineNo">529</span> try {<a name="line.529"></a> |
| <span class="sourceLineNo">530</span> if (Objects.equals(true, predicate.call())) {<a name="line.530"></a> |
| <span class="sourceLineNo">531</span> return;<a name="line.531"></a> |
| <span class="sourceLineNo">532</span> }<a name="line.532"></a> |
| <span class="sourceLineNo">533</span> } catch (Exception e) {<a name="line.533"></a> |
| <span class="sourceLineNo">534</span> if (retryCounter.shouldRetry()) {<a name="line.534"></a> |
| <span class="sourceLineNo">535</span> LOG.debug("execution failed with exception. Retrying.", e);<a name="line.535"></a> |
| <span class="sourceLineNo">536</span> } else {<a name="line.536"></a> |
| <span class="sourceLineNo">537</span> throw new RuntimeException("retries exhausted", e);<a name="line.537"></a> |
| <span class="sourceLineNo">538</span> }<a name="line.538"></a> |
| <span class="sourceLineNo">539</span> }<a name="line.539"></a> |
| <span class="sourceLineNo">540</span> try {<a name="line.540"></a> |
| <span class="sourceLineNo">541</span> retryCounter.sleepUntilNextRetry();<a name="line.541"></a> |
| <span class="sourceLineNo">542</span> } catch (InterruptedException e) {<a name="line.542"></a> |
| <span class="sourceLineNo">543</span> throw new RuntimeException(e);<a name="line.543"></a> |
| <span class="sourceLineNo">544</span> }<a name="line.544"></a> |
| <span class="sourceLineNo">545</span> }<a name="line.545"></a> |
| <span class="sourceLineNo">546</span> }<a name="line.546"></a> |
| <span class="sourceLineNo">547</span><a name="line.547"></a> |
| <span class="sourceLineNo">548</span> /*<a name="line.548"></a> |
| <span class="sourceLineNo">549</span> * Some enums to guard against bad calls.<a name="line.549"></a> |
| <span class="sourceLineNo">550</span> */<a name="line.550"></a> |
| <span class="sourceLineNo">551</span><a name="line.551"></a> |
| <span class="sourceLineNo">552</span> // The RoleCommand enum is used by the doRoleCommand method to guard against non-existent methods<a name="line.552"></a> |
| <span class="sourceLineNo">553</span> // being invoked on a given role.<a name="line.553"></a> |
| <span class="sourceLineNo">554</span> // TODO: Integrate zookeeper and hdfs related failure injections (Ref: HBASE-14261).<a name="line.554"></a> |
| <span class="sourceLineNo">555</span> private enum RoleCommand {<a name="line.555"></a> |
| <span class="sourceLineNo">556</span> START, STOP, RESTART;<a name="line.556"></a> |
| <span class="sourceLineNo">557</span><a name="line.557"></a> |
| <span class="sourceLineNo">558</span> // APIs tend to take commands in lowercase, so convert them to save the trouble later.<a name="line.558"></a> |
| <span class="sourceLineNo">559</span> @Override<a name="line.559"></a> |
| <span class="sourceLineNo">560</span> public String toString() {<a name="line.560"></a> |
| <span class="sourceLineNo">561</span> return name().toLowerCase(Locale.ROOT);<a name="line.561"></a> |
| <span class="sourceLineNo">562</span> }<a name="line.562"></a> |
| <span class="sourceLineNo">563</span> }<a name="line.563"></a> |
| <span class="sourceLineNo">564</span><a name="line.564"></a> |
| <span class="sourceLineNo">565</span> /**<a name="line.565"></a> |
| <span class="sourceLineNo">566</span> * Represents the configured run state of a role.<a name="line.566"></a> |
| <span class="sourceLineNo">567</span> * @see <a href="https://archive.cloudera.com/cm6/6.3.0/generic/jar/cm_api/apidocs/json_ApiRoleState.html"><a name="line.567"></a> |
| <span class="sourceLineNo">568</span> * https://archive.cloudera.com/cm6/6.3.0/generic/jar/cm_api/apidocs/json_ApiRoleState.html</a><a name="line.568"></a> |
| <span class="sourceLineNo">569</span> */<a name="line.569"></a> |
| <span class="sourceLineNo">570</span> private enum RoleState {<a name="line.570"></a> |
| <span class="sourceLineNo">571</span> HISTORY_NOT_AVAILABLE, UNKNOWN, STARTING, STARTED, BUSY, STOPPING, STOPPED, NA;<a name="line.571"></a> |
| <span class="sourceLineNo">572</span><a name="line.572"></a> |
| <span class="sourceLineNo">573</span> public static RoleState fromString(final String value) {<a name="line.573"></a> |
| <span class="sourceLineNo">574</span> if (StringUtils.isBlank(value)) {<a name="line.574"></a> |
| <span class="sourceLineNo">575</span> return null;<a name="line.575"></a> |
| <span class="sourceLineNo">576</span> }<a name="line.576"></a> |
| <span class="sourceLineNo">577</span> return RoleState.valueOf(value.toUpperCase());<a name="line.577"></a> |
| <span class="sourceLineNo">578</span> }<a name="line.578"></a> |
| <span class="sourceLineNo">579</span> }<a name="line.579"></a> |
| <span class="sourceLineNo">580</span><a name="line.580"></a> |
| <span class="sourceLineNo">581</span> /**<a name="line.581"></a> |
| <span class="sourceLineNo">582</span> * Represents of the high-level health status of a subject in the cluster.<a name="line.582"></a> |
| <span class="sourceLineNo">583</span> * @see <a href="https://archive.cloudera.com/cm6/6.3.0/generic/jar/cm_api/apidocs/json_ApiHealthSummary.html"><a name="line.583"></a> |
| <span class="sourceLineNo">584</span> * https://archive.cloudera.com/cm6/6.3.0/generic/jar/cm_api/apidocs/json_ApiHealthSummary.html</a><a name="line.584"></a> |
| <span class="sourceLineNo">585</span> */<a name="line.585"></a> |
| <span class="sourceLineNo">586</span> private enum HealthSummary {<a name="line.586"></a> |
| <span class="sourceLineNo">587</span> DISABLED, HISTORY_NOT_AVAILABLE, NOT_AVAILABLE, GOOD, CONCERNING, BAD;<a name="line.587"></a> |
| <span class="sourceLineNo">588</span><a name="line.588"></a> |
| <span class="sourceLineNo">589</span> public static HealthSummary fromString(final String value) {<a name="line.589"></a> |
| <span class="sourceLineNo">590</span> if (StringUtils.isBlank(value)) {<a name="line.590"></a> |
| <span class="sourceLineNo">591</span> return null;<a name="line.591"></a> |
| <span class="sourceLineNo">592</span> }<a name="line.592"></a> |
| <span class="sourceLineNo">593</span> return HealthSummary.valueOf(value.toUpperCase());<a name="line.593"></a> |
| <span class="sourceLineNo">594</span> }<a name="line.594"></a> |
| <span class="sourceLineNo">595</span> }<a name="line.595"></a> |
| <span class="sourceLineNo">596</span><a name="line.596"></a> |
| <span class="sourceLineNo">597</span> // ClusterManager methods take a "ServiceType" object (e.g. "HBASE_MASTER," "HADOOP_NAMENODE").<a name="line.597"></a> |
| <span class="sourceLineNo">598</span> // These "service types," which cluster managers call "roles" or "components," need to be mapped<a name="line.598"></a> |
| <span class="sourceLineNo">599</span> // to their corresponding service (e.g. "HBase," "HDFS") in order to be controlled.<a name="line.599"></a> |
| <span class="sourceLineNo">600</span> private static final Map<ServiceType, Service> roleServiceType = buildRoleServiceTypeMap();<a name="line.600"></a> |
| <span class="sourceLineNo">601</span><a name="line.601"></a> |
| <span class="sourceLineNo">602</span> private static Map<ServiceType, Service> buildRoleServiceTypeMap() {<a name="line.602"></a> |
| <span class="sourceLineNo">603</span> final Map<ServiceType, Service> ret = new HashMap<>();<a name="line.603"></a> |
| <span class="sourceLineNo">604</span> ret.put(ServiceType.HADOOP_NAMENODE, Service.HDFS);<a name="line.604"></a> |
| <span class="sourceLineNo">605</span> ret.put(ServiceType.HADOOP_DATANODE, Service.HDFS);<a name="line.605"></a> |
| <span class="sourceLineNo">606</span> ret.put(ServiceType.HADOOP_JOBTRACKER, Service.MAPREDUCE);<a name="line.606"></a> |
| <span class="sourceLineNo">607</span> ret.put(ServiceType.HADOOP_TASKTRACKER, Service.MAPREDUCE);<a name="line.607"></a> |
| <span class="sourceLineNo">608</span> ret.put(ServiceType.HBASE_MASTER, Service.HBASE);<a name="line.608"></a> |
| <span class="sourceLineNo">609</span> ret.put(ServiceType.HBASE_REGIONSERVER, Service.HBASE);<a name="line.609"></a> |
| <span class="sourceLineNo">610</span> return Collections.unmodifiableMap(ret);<a name="line.610"></a> |
| <span class="sourceLineNo">611</span> }<a name="line.611"></a> |
| <span class="sourceLineNo">612</span><a name="line.612"></a> |
| <span class="sourceLineNo">613</span> enum Service {<a name="line.613"></a> |
| <span class="sourceLineNo">614</span> HBASE, HDFS, MAPREDUCE<a name="line.614"></a> |
| <span class="sourceLineNo">615</span> }<a name="line.615"></a> |
| <span class="sourceLineNo">616</span>}<a name="line.616"></a> |
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| </pre> |
| </div> |
| </body> |
| </html> |
