org.apache.hadoop.hdfs.server.datanode
Class SecureDataNodeStarter

java.lang.Object
  org.apache.hadoop.hdfs.server.datanode.SecureDataNodeStarter

All Implemented Interfaces:

org.apache.commons.daemon.Daemon

public class SecureDataNodeStarter
extends Object
implements org.apache.commons.daemon.Daemon

Utility class to start a datanode in a secure cluster, first obtaining privileged resources before main startup and handing them to the datanode.

Nested Class Summary

static class

SecureDataNodeStarter.SecureResources Stash necessary resources needed for datanode operation in a secure env.

Constructor Summary

SecureDataNodeStarter()

Method Summary

void	destroy()
static SecureDataNodeStarter.SecureResources	getSecureResources(org.apache.hadoop.conf.Configuration conf) Acquire privileged resources (i.e., the privileged ports) for the data node.
void	init(org.apache.commons.daemon.DaemonContext context)
void	start()
void	stop()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

SecureDataNodeStarter

public SecureDataNodeStarter()

Method Detail

init

public void init(org.apache.commons.daemon.DaemonContext context)
          throws Exception

Specified by:

init in interface org.apache.commons.daemon.Daemon

Throws:

Exception

start

public void start()
           throws Exception

Specified by:

start in interface org.apache.commons.daemon.Daemon

Throws:

Exception

destroy

public void destroy()

Specified by:

destroy in interface org.apache.commons.daemon.Daemon

stop

public void stop()
          throws Exception

Specified by:

stop in interface org.apache.commons.daemon.Daemon

Throws:

Exception

getSecureResources

public static SecureDataNodeStarter.SecureResources getSecureResources(org.apache.hadoop.conf.Configuration conf)
                                                                throws Exception

Acquire privileged resources (i.e., the privileged ports) for the data node. The privileged resources consist of the port of the RPC server and the port of HTTP (not HTTPS) server.

Throws:

Exception