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https://issues.apache.org/jira/browse/HDFS-10721?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15413144#comment-15413144
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Senthilkumar commented on HDFS-10721:
-------------------------------------
Thanks [~benoyantony] for add me to contributor group.
> HDFS NFS Gateway - Exporting multiple Directories
> --------------------------------------------------
>
> Key: HDFS-10721
> URL: https://issues.apache.org/jira/browse/HDFS-10721
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: hdfs
> Reporter: Senthilkumar
> Assignee: Senthilkumar
> Priority: Minor
>
> Current HDFS NFS gateway Supports exporting only one Directory..
> Example :
> <property>
> <name>nfs.export.point</name>
> <value>/user</value>
> </property>
> This property helps us to export particular directory ..
> Code Block :
> public RpcProgramMountd(NfsConfiguration config,
> DatagramSocket registrationSocket, boolean allowInsecurePorts)
> throws IOException {
> // Note that RPC cache is not enabled
> super("mountd", "localhost", config.getInt(
> NfsConfigKeys.DFS_NFS_MOUNTD_PORT_KEY,
> NfsConfigKeys.DFS_NFS_MOUNTD_PORT_DEFAULT), PROGRAM, VERSION_1,
> VERSION_3, registrationSocket, allowInsecurePorts);
> exports = new ArrayList<String>();
> exports.add(config.get(NfsConfigKeys.DFS_NFS_EXPORT_POINT_KEY,
> NfsConfigKeys.DFS_NFS_EXPORT_POINT_DEFAULT));
> this.hostsMatcher = NfsExports.getInstance(config);
> this.mounts = Collections.synchronizedList(new ArrayList<MountEntry>());
> UserGroupInformation.setConfiguration(config);
> SecurityUtil.login(config, NfsConfigKeys.DFS_NFS_KEYTAB_FILE_KEY,
> NfsConfigKeys.DFS_NFS_KERBEROS_PRINCIPAL_KEY);
> this.dfsClient = new DFSClient(NameNode.getAddress(config), config);
> }
> Export List:
> exports.add(config.get(NfsConfigKeys.DFS_NFS_EXPORT_POINT_KEY,
> NfsConfigKeys.DFS_NFS_EXPORT_POINT_DEFAULT));
> Current Code is supporting only one directory to be exposed ... Based on our
> example /user can be exported ..
> Most of the production environment expects more number of directories should
> be exported and the same can be mounted for different clients..
> Example:
> <property>
> <name>nfs.export.point</name>
> <value>/user,/data/web_crawler,/app-logs</value>
> </property>
> Here i have three directories to be exposed ..
> 1) /user
> 2) /data/web_crawler
> 3) /app-logs
> This would help us to mount directories for particular client ( Say client A
> wants to write data in /app-logs - Hadoop Admin can mount and handover to
> clients ).
> Please advise here.. Sorry if this feature is already implemented..
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