/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/*
* Test the MiniDFSCluster functionality that allows "dfs.datanode.address",
* "dfs.datanode.http.address", and "dfs.datanode.ipc.address" to be
* configurable. The MiniDFSCluster.startDataNodes() API now has a parameter
* that will check these properties if told to do so.
*/
package org.apache.hadoop.hdfs;
import java.io.IOException;
import java.util.ArrayList;
import junit.framework.TestCase;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hdfs.server.datanode.DataNode;
import org.apache.hadoop.hdfs.server.common.HdfsServerConstants.StartupOption;
import org.apache.hadoop.hdfs.MiniDFSCluster.DataNodeProperties;
public class TestDFSAddressConfig extends TestCase {
public void testDFSAddressConfig() throws IOException {
Configuration conf = new HdfsConfiguration();
/*-------------------------------------------------------------------------
* By default, the DataNode socket address should be localhost (127.0.0.1).
*------------------------------------------------------------------------*/
MiniDFSCluster cluster = new MiniDFSCluster.Builder(conf).build();
cluster.waitActive();
ArrayList<DataNode> dns = cluster.getDataNodes();
DataNode dn = dns.get(0);
String selfSocketAddr = dn.getSelfAddr().toString();
System.out.println("DN Self Socket Addr == " + selfSocketAddr);
assertTrue(selfSocketAddr.startsWith("/127.0.0.1:"));
/*-------------------------------------------------------------------------
* Shut down the datanodes, reconfigure, and bring them back up.
* Even if told to use the configuration properties for dfs.datanode,
* MiniDFSCluster.startDataNodes() should use localhost as the default if
* the dfs.datanode properties are not set.
*------------------------------------------------------------------------*/
for (int i = 0; i < dns.size(); i++) {
DataNodeProperties dnp = cluster.stopDataNode(i);
assertNotNull("Should have been able to stop simulated datanode", dnp);
}
conf.unset("dfs.datanode.address");
conf.unset("dfs.datanode.http.address");
conf.unset("dfs.datanode.ipc.address");
cluster.startDataNodes(conf, 1, true, StartupOption.REGULAR,
null, null, null, false, true);
dns = cluster.getDataNodes();
dn = dns.get(0);
selfSocketAddr = dn.getSelfAddr().toString();
System.out.println("DN Self Socket Addr == " + selfSocketAddr);
// assert that default self socket address is 127.0.0.1
assertTrue(selfSocketAddr.startsWith("/127.0.0.1:"));
/*-------------------------------------------------------------------------
* Shut down the datanodes, reconfigure, and bring them back up.
* This time, modify the dfs.datanode properties and make sure that they
* are used to configure sockets by MiniDFSCluster.startDataNodes().
*------------------------------------------------------------------------*/
for (int i = 0; i < dns.size(); i++) {
DataNodeProperties dnp = cluster.stopDataNode(i);
assertNotNull("Should have been able to stop simulated datanode", dnp);
}
conf.set("dfs.datanode.address","0.0.0.0:0");
conf.set("dfs.datanode.http.address","0.0.0.0:0");
conf.set("dfs.datanode.ipc.address","0.0.0.0:0");
cluster.startDataNodes(conf, 1, true, StartupOption.REGULAR,
null, null, null, false, true);
dns = cluster.getDataNodes();
dn = dns.get(0);
selfSocketAddr = dn.getSelfAddr().toString();
System.out.println("DN Self Socket Addr == " + selfSocketAddr);
// assert that default self socket address is 0.0.0.0
assertTrue(selfSocketAddr.startsWith("/0.0.0.0:"));
cluster.shutdown();
}
}