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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 java.io.IOException;<a name="line.21"></a> |
| <span class="sourceLineNo">022</span>import java.net.URI;<a name="line.22"></a> |
| <span class="sourceLineNo">023</span>import java.util.HashMap;<a name="line.23"></a> |
| <span class="sourceLineNo">024</span>import java.util.Locale;<a name="line.24"></a> |
| <span class="sourceLineNo">025</span>import java.util.Map;<a name="line.25"></a> |
| <span class="sourceLineNo">026</span>import javax.ws.rs.client.Client;<a name="line.26"></a> |
| <span class="sourceLineNo">027</span>import javax.ws.rs.client.ClientBuilder;<a name="line.27"></a> |
| <span class="sourceLineNo">028</span>import javax.ws.rs.client.Entity;<a name="line.28"></a> |
| <span class="sourceLineNo">029</span>import javax.ws.rs.client.Invocation;<a name="line.29"></a> |
| <span class="sourceLineNo">030</span>import javax.ws.rs.client.WebTarget;<a name="line.30"></a> |
| <span class="sourceLineNo">031</span>import javax.ws.rs.core.MediaType;<a name="line.31"></a> |
| <span class="sourceLineNo">032</span>import javax.ws.rs.core.Response;<a name="line.32"></a> |
| <span class="sourceLineNo">033</span>import javax.ws.rs.core.UriBuilder;<a name="line.33"></a> |
| <span class="sourceLineNo">034</span>import javax.xml.ws.http.HTTPException;<a name="line.34"></a> |
| <span class="sourceLineNo">035</span>import org.apache.hadoop.conf.Configuration;<a name="line.35"></a> |
| <span class="sourceLineNo">036</span>import org.apache.hadoop.conf.Configured;<a name="line.36"></a> |
| <span class="sourceLineNo">037</span>import org.apache.hadoop.hbase.util.GsonUtil;<a name="line.37"></a> |
| <span class="sourceLineNo">038</span>import org.apache.hadoop.util.ReflectionUtils;<a name="line.38"></a> |
| <span class="sourceLineNo">039</span>import org.glassfish.jersey.client.authentication.HttpAuthenticationFeature;<a name="line.39"></a> |
| <span class="sourceLineNo">040</span>import org.slf4j.Logger;<a name="line.40"></a> |
| <span class="sourceLineNo">041</span>import org.slf4j.LoggerFactory;<a name="line.41"></a> |
| <span class="sourceLineNo">042</span><a name="line.42"></a> |
| <span class="sourceLineNo">043</span>import org.apache.hbase.thirdparty.com.google.gson.Gson;<a name="line.43"></a> |
| <span class="sourceLineNo">044</span>import org.apache.hbase.thirdparty.com.google.gson.JsonElement;<a name="line.44"></a> |
| <span class="sourceLineNo">045</span>import org.apache.hbase.thirdparty.com.google.gson.JsonObject;<a name="line.45"></a> |
| <span class="sourceLineNo">046</span><a name="line.46"></a> |
| <span class="sourceLineNo">047</span>/**<a name="line.47"></a> |
| <span class="sourceLineNo">048</span> * A ClusterManager implementation designed to control Cloudera Manager (http://www.cloudera.com)<a name="line.48"></a> |
| <span class="sourceLineNo">049</span> * clusters via REST API. This API uses HTTP GET requests against the cluster manager server to<a name="line.49"></a> |
| <span class="sourceLineNo">050</span> * retrieve information and POST/PUT requests to perform actions. As a simple example, to retrieve a<a name="line.50"></a> |
| <span class="sourceLineNo">051</span> * list of hosts from a CM server with login credentials admin:admin, a simple curl command would be<a name="line.51"></a> |
| <span class="sourceLineNo">052</span> * curl -X POST -H "Content-Type:application/json" -u admin:admin \<a name="line.52"></a> |
| <span class="sourceLineNo">053</span> * "http://this.is.my.server.com:7180/api/v8/hosts"<a name="line.53"></a> |
| <span class="sourceLineNo">054</span> *<a name="line.54"></a> |
| <span class="sourceLineNo">055</span> * This command would return a JSON result, which would need to be parsed to retrieve relevant<a name="line.55"></a> |
| <span class="sourceLineNo">056</span> * information. This action and many others are covered by this class.<a name="line.56"></a> |
| <span class="sourceLineNo">057</span> *<a name="line.57"></a> |
| <span class="sourceLineNo">058</span> * A note on nomenclature: while the ClusterManager interface uses a ServiceType enum when<a name="line.58"></a> |
| <span class="sourceLineNo">059</span> * referring to things like RegionServers and DataNodes, cluster managers often use different<a name="line.59"></a> |
| <span class="sourceLineNo">060</span> * terminology. As an example, Cloudera Manager (http://www.cloudera.com) would refer to a<a name="line.60"></a> |
| <span class="sourceLineNo">061</span> * RegionServer as a "role" of the HBase "service." It would further refer to "hbase" as the<a name="line.61"></a> |
| <span class="sourceLineNo">062</span> * "serviceType." Apache Ambari (http://ambari.apache.org) would call the RegionServer a<a name="line.62"></a> |
| <span class="sourceLineNo">063</span> * "component" of the HBase "service."<a name="line.63"></a> |
| <span class="sourceLineNo">064</span> *<a name="line.64"></a> |
| <span class="sourceLineNo">065</span> * This class will defer to the ClusterManager terminology in methods that it implements from<a name="line.65"></a> |
| <span class="sourceLineNo">066</span> * that interface, but uses Cloudera Manager's terminology when dealing with its API directly.<a name="line.66"></a> |
| <span class="sourceLineNo">067</span> */<a name="line.67"></a> |
| <span class="sourceLineNo">068</span>public class RESTApiClusterManager extends Configured implements ClusterManager {<a name="line.68"></a> |
| <span class="sourceLineNo">069</span> // Properties that need to be in the Configuration object to interact with the REST API cluster<a name="line.69"></a> |
| <span class="sourceLineNo">070</span> // manager. Most easily defined in hbase-site.xml, but can also be passed on the command line.<a name="line.70"></a> |
| <span class="sourceLineNo">071</span> private static final String REST_API_CLUSTER_MANAGER_HOSTNAME =<a name="line.71"></a> |
| <span class="sourceLineNo">072</span> "hbase.it.clustermanager.restapi.hostname";<a name="line.72"></a> |
| <span class="sourceLineNo">073</span> private static final String REST_API_CLUSTER_MANAGER_USERNAME =<a name="line.73"></a> |
| <span class="sourceLineNo">074</span> "hbase.it.clustermanager.restapi.username";<a name="line.74"></a> |
| <span class="sourceLineNo">075</span> private static final String REST_API_CLUSTER_MANAGER_PASSWORD =<a name="line.75"></a> |
| <span class="sourceLineNo">076</span> "hbase.it.clustermanager.restapi.password";<a name="line.76"></a> |
| <span class="sourceLineNo">077</span> private static final String REST_API_CLUSTER_MANAGER_CLUSTER_NAME =<a name="line.77"></a> |
| <span class="sourceLineNo">078</span> "hbase.it.clustermanager.restapi.clustername";<a name="line.78"></a> |
| <span class="sourceLineNo">079</span><a name="line.79"></a> |
| <span class="sourceLineNo">080</span> private static final Gson GSON = GsonUtil.createGson().create();<a name="line.80"></a> |
| <span class="sourceLineNo">081</span><a name="line.81"></a> |
| <span class="sourceLineNo">082</span> // Some default values for the above properties.<a name="line.82"></a> |
| <span class="sourceLineNo">083</span> private static final String DEFAULT_SERVER_HOSTNAME = "http://localhost:7180";<a name="line.83"></a> |
| <span class="sourceLineNo">084</span> private static final String DEFAULT_SERVER_USERNAME = "admin";<a name="line.84"></a> |
| <span class="sourceLineNo">085</span> private static final String DEFAULT_SERVER_PASSWORD = "admin";<a name="line.85"></a> |
| <span class="sourceLineNo">086</span> private static final String DEFAULT_CLUSTER_NAME = "Cluster 1";<a name="line.86"></a> |
| <span class="sourceLineNo">087</span><a name="line.87"></a> |
| <span class="sourceLineNo">088</span> // Fields for the hostname, username, password, and cluster name of the cluster management server<a name="line.88"></a> |
| <span class="sourceLineNo">089</span> // to be used.<a name="line.89"></a> |
| <span class="sourceLineNo">090</span> private String serverHostname;<a name="line.90"></a> |
| <span class="sourceLineNo">091</span> private String serverUsername;<a name="line.91"></a> |
| <span class="sourceLineNo">092</span> private String serverPassword;<a name="line.92"></a> |
| <span class="sourceLineNo">093</span> private String clusterName;<a name="line.93"></a> |
| <span class="sourceLineNo">094</span><a name="line.94"></a> |
| <span class="sourceLineNo">095</span> // Each version of Cloudera Manager supports a particular API versions. Version 6 of this API<a name="line.95"></a> |
| <span class="sourceLineNo">096</span> // provides all the features needed by this class.<a name="line.96"></a> |
| <span class="sourceLineNo">097</span> private static final String API_VERSION = "v6";<a name="line.97"></a> |
| <span class="sourceLineNo">098</span><a name="line.98"></a> |
| <span class="sourceLineNo">099</span> // Client instances are expensive, so use the same one for all our REST queries.<a name="line.99"></a> |
| <span class="sourceLineNo">100</span> private Client client = ClientBuilder.newClient();<a name="line.100"></a> |
| <span class="sourceLineNo">101</span><a name="line.101"></a> |
| <span class="sourceLineNo">102</span> // An instance of HBaseClusterManager is used for methods like the kill, resume, and suspend<a name="line.102"></a> |
| <span class="sourceLineNo">103</span> // because cluster managers don't tend to implement these operations.<a name="line.103"></a> |
| <span class="sourceLineNo">104</span> private ClusterManager hBaseClusterManager;<a name="line.104"></a> |
| <span class="sourceLineNo">105</span><a name="line.105"></a> |
| <span class="sourceLineNo">106</span> private static final Logger LOG = LoggerFactory.getLogger(RESTApiClusterManager.class);<a name="line.106"></a> |
| <span class="sourceLineNo">107</span><a name="line.107"></a> |
| <span class="sourceLineNo">108</span> RESTApiClusterManager() {<a name="line.108"></a> |
| <span class="sourceLineNo">109</span> hBaseClusterManager = ReflectionUtils.newInstance(HBaseClusterManager.class,<a name="line.109"></a> |
| <span class="sourceLineNo">110</span> new IntegrationTestingUtility().getConfiguration());<a name="line.110"></a> |
| <span class="sourceLineNo">111</span> }<a name="line.111"></a> |
| <span class="sourceLineNo">112</span><a name="line.112"></a> |
| <span class="sourceLineNo">113</span> @Override<a name="line.113"></a> |
| <span class="sourceLineNo">114</span> public void setConf(Configuration conf) {<a name="line.114"></a> |
| <span class="sourceLineNo">115</span> super.setConf(conf);<a name="line.115"></a> |
| <span class="sourceLineNo">116</span> if (conf == null) {<a name="line.116"></a> |
| <span class="sourceLineNo">117</span> // Configured gets passed null before real conf. Why? I don't know.<a name="line.117"></a> |
| <span class="sourceLineNo">118</span> return;<a name="line.118"></a> |
| <span class="sourceLineNo">119</span> }<a name="line.119"></a> |
| <span class="sourceLineNo">120</span> serverHostname = conf.get(REST_API_CLUSTER_MANAGER_HOSTNAME, DEFAULT_SERVER_HOSTNAME);<a name="line.120"></a> |
| <span class="sourceLineNo">121</span> serverUsername = conf.get(REST_API_CLUSTER_MANAGER_USERNAME, DEFAULT_SERVER_USERNAME);<a name="line.121"></a> |
| <span class="sourceLineNo">122</span> serverPassword = conf.get(REST_API_CLUSTER_MANAGER_PASSWORD, DEFAULT_SERVER_PASSWORD);<a name="line.122"></a> |
| <span class="sourceLineNo">123</span> clusterName = conf.get(REST_API_CLUSTER_MANAGER_CLUSTER_NAME, DEFAULT_CLUSTER_NAME);<a name="line.123"></a> |
| <span class="sourceLineNo">124</span><a name="line.124"></a> |
| <span class="sourceLineNo">125</span> // Add filter to Client instance to enable server authentication.<a name="line.125"></a> |
| <span class="sourceLineNo">126</span> client.register(HttpAuthenticationFeature.basic(serverUsername, serverPassword));<a name="line.126"></a> |
| <span class="sourceLineNo">127</span> }<a name="line.127"></a> |
| <span class="sourceLineNo">128</span><a name="line.128"></a> |
| <span class="sourceLineNo">129</span> @Override<a name="line.129"></a> |
| <span class="sourceLineNo">130</span> public void start(ServiceType service, String hostname, int port) throws IOException {<a name="line.130"></a> |
| <span class="sourceLineNo">131</span> performClusterManagerCommand(service, hostname, RoleCommand.START);<a name="line.131"></a> |
| <span class="sourceLineNo">132</span> }<a name="line.132"></a> |
| <span class="sourceLineNo">133</span><a name="line.133"></a> |
| <span class="sourceLineNo">134</span> @Override<a name="line.134"></a> |
| <span class="sourceLineNo">135</span> public void stop(ServiceType service, String hostname, int port) throws IOException {<a name="line.135"></a> |
| <span class="sourceLineNo">136</span> performClusterManagerCommand(service, hostname, RoleCommand.STOP);<a name="line.136"></a> |
| <span class="sourceLineNo">137</span> }<a name="line.137"></a> |
| <span class="sourceLineNo">138</span><a name="line.138"></a> |
| <span class="sourceLineNo">139</span> @Override<a name="line.139"></a> |
| <span class="sourceLineNo">140</span> public void restart(ServiceType service, String hostname, int port) throws IOException {<a name="line.140"></a> |
| <span class="sourceLineNo">141</span> performClusterManagerCommand(service, hostname, RoleCommand.RESTART);<a name="line.141"></a> |
| <span class="sourceLineNo">142</span> }<a name="line.142"></a> |
| <span class="sourceLineNo">143</span><a name="line.143"></a> |
| <span class="sourceLineNo">144</span> @Override<a name="line.144"></a> |
| <span class="sourceLineNo">145</span> public boolean isRunning(ServiceType service, String hostname, int port) throws IOException {<a name="line.145"></a> |
| <span class="sourceLineNo">146</span> String serviceName = getServiceName(roleServiceType.get(service));<a name="line.146"></a> |
| <span class="sourceLineNo">147</span> String hostId = getHostId(hostname);<a name="line.147"></a> |
| <span class="sourceLineNo">148</span> String roleState = getRoleState(serviceName, service.toString(), hostId);<a name="line.148"></a> |
| <span class="sourceLineNo">149</span> String healthSummary = getHealthSummary(serviceName, service.toString(), hostId);<a name="line.149"></a> |
| <span class="sourceLineNo">150</span> boolean isRunning = false;<a name="line.150"></a> |
| <span class="sourceLineNo">151</span><a name="line.151"></a> |
| <span class="sourceLineNo">152</span> // Use Yoda condition to prevent NullPointerException. roleState will be null if the "service<a name="line.152"></a> |
| <span class="sourceLineNo">153</span> // type" does not exist on the specified hostname.<a name="line.153"></a> |
| <span class="sourceLineNo">154</span> if ("STARTED".equals(roleState) && "GOOD".equals(healthSummary)) {<a name="line.154"></a> |
| <span class="sourceLineNo">155</span> isRunning = true;<a name="line.155"></a> |
| <span class="sourceLineNo">156</span> }<a name="line.156"></a> |
| <span class="sourceLineNo">157</span><a name="line.157"></a> |
| <span class="sourceLineNo">158</span> return isRunning;<a name="line.158"></a> |
| <span class="sourceLineNo">159</span> }<a name="line.159"></a> |
| <span class="sourceLineNo">160</span><a name="line.160"></a> |
| <span class="sourceLineNo">161</span> @Override<a name="line.161"></a> |
| <span class="sourceLineNo">162</span> public void kill(ServiceType service, String hostname, int port) throws IOException {<a name="line.162"></a> |
| <span class="sourceLineNo">163</span> hBaseClusterManager.kill(service, hostname, port);<a name="line.163"></a> |
| <span class="sourceLineNo">164</span> }<a name="line.164"></a> |
| <span class="sourceLineNo">165</span><a name="line.165"></a> |
| <span class="sourceLineNo">166</span> @Override<a name="line.166"></a> |
| <span class="sourceLineNo">167</span> public void suspend(ServiceType service, String hostname, int port) throws IOException {<a name="line.167"></a> |
| <span class="sourceLineNo">168</span> hBaseClusterManager.suspend(service, hostname, port);<a name="line.168"></a> |
| <span class="sourceLineNo">169</span> }<a name="line.169"></a> |
| <span class="sourceLineNo">170</span><a name="line.170"></a> |
| <span class="sourceLineNo">171</span> @Override<a name="line.171"></a> |
| <span class="sourceLineNo">172</span> public void resume(ServiceType service, String hostname, int port) throws IOException {<a name="line.172"></a> |
| <span class="sourceLineNo">173</span> hBaseClusterManager.resume(service, hostname, port);<a name="line.173"></a> |
| <span class="sourceLineNo">174</span> }<a name="line.174"></a> |
| <span class="sourceLineNo">175</span><a name="line.175"></a> |
| <span class="sourceLineNo">176</span><a name="line.176"></a> |
| <span class="sourceLineNo">177</span> // Convenience method to execute command against role on hostname. Only graceful commands are<a name="line.177"></a> |
| <span class="sourceLineNo">178</span> // supported since cluster management APIs don't tend to let you SIGKILL things.<a name="line.178"></a> |
| <span class="sourceLineNo">179</span> private void performClusterManagerCommand(ServiceType role, String hostname, RoleCommand command)<a name="line.179"></a> |
| <span class="sourceLineNo">180</span> throws IOException {<a name="line.180"></a> |
| <span class="sourceLineNo">181</span> LOG.info("Performing " + command + " command against " + role + " on " + hostname + "...");<a name="line.181"></a> |
| <span class="sourceLineNo">182</span> String serviceName = getServiceName(roleServiceType.get(role));<a name="line.182"></a> |
| <span class="sourceLineNo">183</span> String hostId = getHostId(hostname);<a name="line.183"></a> |
| <span class="sourceLineNo">184</span> String roleName = getRoleName(serviceName, role.toString(), hostId);<a name="line.184"></a> |
| <span class="sourceLineNo">185</span> doRoleCommand(serviceName, roleName, command);<a name="line.185"></a> |
| <span class="sourceLineNo">186</span> }<a name="line.186"></a> |
| <span class="sourceLineNo">187</span><a name="line.187"></a> |
| <span class="sourceLineNo">188</span> // Performing a command (e.g. starting or stopping a role) requires a POST instead of a GET.<a name="line.188"></a> |
| <span class="sourceLineNo">189</span> private void doRoleCommand(String serviceName, String roleName, RoleCommand roleCommand) {<a name="line.189"></a> |
| <span class="sourceLineNo">190</span> URI uri = UriBuilder.fromUri(serverHostname)<a name="line.190"></a> |
| <span class="sourceLineNo">191</span> .path("api")<a name="line.191"></a> |
| <span class="sourceLineNo">192</span> .path(API_VERSION)<a name="line.192"></a> |
| <span class="sourceLineNo">193</span> .path("clusters")<a name="line.193"></a> |
| <span class="sourceLineNo">194</span> .path(clusterName)<a name="line.194"></a> |
| <span class="sourceLineNo">195</span> .path("services")<a name="line.195"></a> |
| <span class="sourceLineNo">196</span> .path(serviceName)<a name="line.196"></a> |
| <span class="sourceLineNo">197</span> .path("roleCommands")<a name="line.197"></a> |
| <span class="sourceLineNo">198</span> .path(roleCommand.toString())<a name="line.198"></a> |
| <span class="sourceLineNo">199</span> .build();<a name="line.199"></a> |
| <span class="sourceLineNo">200</span> String body = "{ \"items\": [ \"" + roleName + "\" ] }";<a name="line.200"></a> |
| <span class="sourceLineNo">201</span> LOG.info("Executing POST against " + uri + " with body " + body + "...");<a name="line.201"></a> |
| <span class="sourceLineNo">202</span> WebTarget webTarget = client.target(uri);<a name="line.202"></a> |
| <span class="sourceLineNo">203</span> Invocation.Builder invocationBuilder = webTarget.request(MediaType.APPLICATION_JSON);<a name="line.203"></a> |
| <span class="sourceLineNo">204</span> Response response = invocationBuilder.post(Entity.json(body));<a name="line.204"></a> |
| <span class="sourceLineNo">205</span> int statusCode = response.getStatus();<a name="line.205"></a> |
| <span class="sourceLineNo">206</span> if (statusCode != Response.Status.OK.getStatusCode()) {<a name="line.206"></a> |
| <span class="sourceLineNo">207</span> throw new HTTPException(statusCode);<a name="line.207"></a> |
| <span class="sourceLineNo">208</span> }<a name="line.208"></a> |
| <span class="sourceLineNo">209</span> }<a name="line.209"></a> |
| <span class="sourceLineNo">210</span><a name="line.210"></a> |
| <span class="sourceLineNo">211</span> // Possible healthSummary values include "GOOD" and "BAD."<a name="line.211"></a> |
| <span class="sourceLineNo">212</span> private String getHealthSummary(String serviceName, String roleType, String hostId)<a name="line.212"></a> |
| <span class="sourceLineNo">213</span> throws IOException {<a name="line.213"></a> |
| <span class="sourceLineNo">214</span> return getRolePropertyValue(serviceName, roleType, hostId, "healthSummary");<a name="line.214"></a> |
| <span class="sourceLineNo">215</span> }<a name="line.215"></a> |
| <span class="sourceLineNo">216</span><a name="line.216"></a> |
| <span class="sourceLineNo">217</span> // This API uses a hostId to execute host-specific commands; get one from a hostname.<a name="line.217"></a> |
| <span class="sourceLineNo">218</span> private String getHostId(String hostname) throws IOException {<a name="line.218"></a> |
| <span class="sourceLineNo">219</span> String hostId = null;<a name="line.219"></a> |
| <span class="sourceLineNo">220</span><a name="line.220"></a> |
| <span class="sourceLineNo">221</span> URI uri =<a name="line.221"></a> |
| <span class="sourceLineNo">222</span> UriBuilder.fromUri(serverHostname).path("api").path(API_VERSION).path("hosts").build();<a name="line.222"></a> |
| <span class="sourceLineNo">223</span> JsonElement hosts = getJsonNodeFromURIGet(uri);<a name="line.223"></a> |
| <span class="sourceLineNo">224</span> if (hosts != null) {<a name="line.224"></a> |
| <span class="sourceLineNo">225</span> // Iterate through the list of hosts, stopping once you've reached the requested hostname.<a name="line.225"></a> |
| <span class="sourceLineNo">226</span> for (JsonElement host : hosts.getAsJsonArray()) {<a name="line.226"></a> |
| <span class="sourceLineNo">227</span> if (host.getAsJsonObject().get("hostname").getAsString().equals(hostname)) {<a name="line.227"></a> |
| <span class="sourceLineNo">228</span> hostId = host.getAsJsonObject().get("hostId").getAsString();<a name="line.228"></a> |
| <span class="sourceLineNo">229</span> break;<a name="line.229"></a> |
| <span class="sourceLineNo">230</span> }<a name="line.230"></a> |
| <span class="sourceLineNo">231</span> }<a name="line.231"></a> |
| <span class="sourceLineNo">232</span> } else {<a name="line.232"></a> |
| <span class="sourceLineNo">233</span> hostId = null;<a name="line.233"></a> |
| <span class="sourceLineNo">234</span> }<a name="line.234"></a> |
| <span class="sourceLineNo">235</span><a name="line.235"></a> |
| <span class="sourceLineNo">236</span> return hostId;<a name="line.236"></a> |
| <span class="sourceLineNo">237</span> }<a name="line.237"></a> |
| <span class="sourceLineNo">238</span><a name="line.238"></a> |
| <span class="sourceLineNo">239</span> // Execute GET against URI, returning a JsonNode object to be traversed.<a name="line.239"></a> |
| <span class="sourceLineNo">240</span> private JsonElement getJsonNodeFromURIGet(URI uri) throws IOException {<a name="line.240"></a> |
| <span class="sourceLineNo">241</span> LOG.info("Executing GET against " + uri + "...");<a name="line.241"></a> |
| <span class="sourceLineNo">242</span> WebTarget webTarget = client.target(uri);<a name="line.242"></a> |
| <span class="sourceLineNo">243</span> Invocation.Builder invocationBuilder = webTarget.request(MediaType.APPLICATION_JSON);<a name="line.243"></a> |
| <span class="sourceLineNo">244</span> Response response = invocationBuilder.get();<a name="line.244"></a> |
| <span class="sourceLineNo">245</span> int statusCode = response.getStatus();<a name="line.245"></a> |
| <span class="sourceLineNo">246</span> if (statusCode != Response.Status.OK.getStatusCode()) {<a name="line.246"></a> |
| <span class="sourceLineNo">247</span> throw new HTTPException(statusCode);<a name="line.247"></a> |
| <span class="sourceLineNo">248</span> }<a name="line.248"></a> |
| <span class="sourceLineNo">249</span> // This API folds information as the value to an "items" attribute.<a name="line.249"></a> |
| <span class="sourceLineNo">250</span> return GSON.toJsonTree(response.readEntity(String.class)).getAsJsonObject().get("items");<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> // This API assigns a unique role name to each host's instance of a role.<a name="line.253"></a> |
| <span class="sourceLineNo">254</span> private String getRoleName(String serviceName, String roleType, String hostId)<a name="line.254"></a> |
| <span class="sourceLineNo">255</span> throws IOException {<a name="line.255"></a> |
| <span class="sourceLineNo">256</span> return getRolePropertyValue(serviceName, roleType, hostId, "name");<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> // Get the value of a property from a role on a particular host.<a name="line.259"></a> |
| <span class="sourceLineNo">260</span> private String getRolePropertyValue(String serviceName, String roleType, String hostId,<a name="line.260"></a> |
| <span class="sourceLineNo">261</span> String property) throws IOException {<a name="line.261"></a> |
| <span class="sourceLineNo">262</span> String roleValue = null;<a name="line.262"></a> |
| <span class="sourceLineNo">263</span> URI uri = UriBuilder.fromUri(serverHostname).path("api").path(API_VERSION).path("clusters")<a name="line.263"></a> |
| <span class="sourceLineNo">264</span> .path(clusterName).path("services").path(serviceName).path("roles").build();<a name="line.264"></a> |
| <span class="sourceLineNo">265</span> JsonElement roles = getJsonNodeFromURIGet(uri);<a name="line.265"></a> |
| <span class="sourceLineNo">266</span> if (roles != null) {<a name="line.266"></a> |
| <span class="sourceLineNo">267</span> // Iterate through the list of roles, stopping once the requested one is found.<a name="line.267"></a> |
| <span class="sourceLineNo">268</span> for (JsonElement role : roles.getAsJsonArray()) {<a name="line.268"></a> |
| <span class="sourceLineNo">269</span> JsonObject roleObj = role.getAsJsonObject();<a name="line.269"></a> |
| <span class="sourceLineNo">270</span> if (roleObj.get("hostRef").getAsJsonObject().get("hostId").getAsString().equals(hostId) &&<a name="line.270"></a> |
| <span class="sourceLineNo">271</span> roleObj.get("type").getAsString().toLowerCase(Locale.ROOT)<a name="line.271"></a> |
| <span class="sourceLineNo">272</span> .equals(roleType.toLowerCase(Locale.ROOT))) {<a name="line.272"></a> |
| <span class="sourceLineNo">273</span> roleValue = roleObj.get(property).getAsString();<a name="line.273"></a> |
| <span class="sourceLineNo">274</span> break;<a name="line.274"></a> |
| <span class="sourceLineNo">275</span> }<a name="line.275"></a> |
| <span class="sourceLineNo">276</span> }<a name="line.276"></a> |
| <span class="sourceLineNo">277</span> }<a name="line.277"></a> |
| <span class="sourceLineNo">278</span><a name="line.278"></a> |
| <span class="sourceLineNo">279</span> return roleValue;<a name="line.279"></a> |
| <span class="sourceLineNo">280</span> }<a name="line.280"></a> |
| <span class="sourceLineNo">281</span><a name="line.281"></a> |
| <span class="sourceLineNo">282</span> // Possible roleState values include "STARTED" and "STOPPED."<a name="line.282"></a> |
| <span class="sourceLineNo">283</span> private String getRoleState(String serviceName, String roleType, String hostId)<a name="line.283"></a> |
| <span class="sourceLineNo">284</span> throws IOException {<a name="line.284"></a> |
| <span class="sourceLineNo">285</span> return getRolePropertyValue(serviceName, roleType, hostId, "roleState");<a name="line.285"></a> |
| <span class="sourceLineNo">286</span> }<a name="line.286"></a> |
| <span class="sourceLineNo">287</span><a name="line.287"></a> |
| <span class="sourceLineNo">288</span> // Convert a service (e.g. "HBASE," "HDFS") into a service name (e.g. "HBASE-1," "HDFS-1").<a name="line.288"></a> |
| <span class="sourceLineNo">289</span> private String getServiceName(Service service) throws IOException {<a name="line.289"></a> |
| <span class="sourceLineNo">290</span> String serviceName = null;<a name="line.290"></a> |
| <span class="sourceLineNo">291</span> URI uri = UriBuilder.fromUri(serverHostname).path("api").path(API_VERSION).path("clusters")<a name="line.291"></a> |
| <span class="sourceLineNo">292</span> .path(clusterName).path("services").build();<a name="line.292"></a> |
| <span class="sourceLineNo">293</span> JsonElement services = getJsonNodeFromURIGet(uri);<a name="line.293"></a> |
| <span class="sourceLineNo">294</span> if (services != null) {<a name="line.294"></a> |
| <span class="sourceLineNo">295</span> // Iterate through the list of services, stopping once the requested one is found.<a name="line.295"></a> |
| <span class="sourceLineNo">296</span> for (JsonElement serviceEntry : services.getAsJsonArray()) {<a name="line.296"></a> |
| <span class="sourceLineNo">297</span> if (serviceEntry.getAsJsonObject().get("type").getAsString().equals(service.toString())) {<a name="line.297"></a> |
| <span class="sourceLineNo">298</span> serviceName = serviceEntry.getAsJsonObject().get("name").getAsString();<a name="line.298"></a> |
| <span class="sourceLineNo">299</span> break;<a name="line.299"></a> |
| <span class="sourceLineNo">300</span> }<a name="line.300"></a> |
| <span class="sourceLineNo">301</span> }<a name="line.301"></a> |
| <span class="sourceLineNo">302</span> }<a name="line.302"></a> |
| <span class="sourceLineNo">303</span><a name="line.303"></a> |
| <span class="sourceLineNo">304</span> return serviceName;<a name="line.304"></a> |
| <span class="sourceLineNo">305</span> }<a name="line.305"></a> |
| <span class="sourceLineNo">306</span><a name="line.306"></a> |
| <span class="sourceLineNo">307</span> /*<a name="line.307"></a> |
| <span class="sourceLineNo">308</span> * Some enums to guard against bad calls.<a name="line.308"></a> |
| <span class="sourceLineNo">309</span> */<a name="line.309"></a> |
| <span class="sourceLineNo">310</span><a name="line.310"></a> |
| <span class="sourceLineNo">311</span> // The RoleCommand enum is used by the doRoleCommand method to guard against non-existent methods<a name="line.311"></a> |
| <span class="sourceLineNo">312</span> // being invoked on a given role.<a name="line.312"></a> |
| <span class="sourceLineNo">313</span> // TODO: Integrate zookeeper and hdfs related failure injections (Ref: HBASE-14261).<a name="line.313"></a> |
| <span class="sourceLineNo">314</span> private enum RoleCommand {<a name="line.314"></a> |
| <span class="sourceLineNo">315</span> START, STOP, RESTART;<a name="line.315"></a> |
| <span class="sourceLineNo">316</span><a name="line.316"></a> |
| <span class="sourceLineNo">317</span> // APIs tend to take commands in lowercase, so convert them to save the trouble later.<a name="line.317"></a> |
| <span class="sourceLineNo">318</span> @Override<a name="line.318"></a> |
| <span class="sourceLineNo">319</span> public String toString() {<a name="line.319"></a> |
| <span class="sourceLineNo">320</span> return name().toLowerCase(Locale.ROOT);<a name="line.320"></a> |
| <span class="sourceLineNo">321</span> }<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> // ClusterManager methods take a "ServiceType" object (e.g. "HBASE_MASTER," "HADOOP_NAMENODE").<a name="line.324"></a> |
| <span class="sourceLineNo">325</span> // These "service types," which cluster managers call "roles" or "components," need to be mapped<a name="line.325"></a> |
| <span class="sourceLineNo">326</span> // to their corresponding service (e.g. "HBase," "HDFS") in order to be controlled.<a name="line.326"></a> |
| <span class="sourceLineNo">327</span> private static Map<ServiceType, Service> roleServiceType = new HashMap<>();<a name="line.327"></a> |
| <span class="sourceLineNo">328</span> static {<a name="line.328"></a> |
| <span class="sourceLineNo">329</span> roleServiceType.put(ServiceType.HADOOP_NAMENODE, Service.HDFS);<a name="line.329"></a> |
| <span class="sourceLineNo">330</span> roleServiceType.put(ServiceType.HADOOP_DATANODE, Service.HDFS);<a name="line.330"></a> |
| <span class="sourceLineNo">331</span> roleServiceType.put(ServiceType.HADOOP_JOBTRACKER, Service.MAPREDUCE);<a name="line.331"></a> |
| <span class="sourceLineNo">332</span> roleServiceType.put(ServiceType.HADOOP_TASKTRACKER, Service.MAPREDUCE);<a name="line.332"></a> |
| <span class="sourceLineNo">333</span> roleServiceType.put(ServiceType.HBASE_MASTER, Service.HBASE);<a name="line.333"></a> |
| <span class="sourceLineNo">334</span> roleServiceType.put(ServiceType.HBASE_REGIONSERVER, Service.HBASE);<a name="line.334"></a> |
| <span class="sourceLineNo">335</span> }<a name="line.335"></a> |
| <span class="sourceLineNo">336</span><a name="line.336"></a> |
| <span class="sourceLineNo">337</span> private enum Service {<a name="line.337"></a> |
| <span class="sourceLineNo">338</span> HBASE, HDFS, MAPREDUCE<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> |
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| </div> |
| </body> |
| </html> |
