[ http://issues.apache.org/jira/browse/HADOOP-497?page=all ]
Lorenzo Thione updated HADOOP-497:
----------------------------------
Attachment: net-dns.patch
> DataNodes and TaskTrackers should be able to report hostnames and ips
> relative to customizable network interfaces and nameservers
> ---------------------------------------------------------------------------------------------------------------------------------
>
> Key: HADOOP-497
> URL: http://issues.apache.org/jira/browse/HADOOP-497
> Project: Hadoop
> Issue Type: New Feature
> Components: mapred, dfs, util
> Affects Versions: 0.6.0
> Reporter: Lorenzo Thione
> Priority: Minor
> Attachments: dnsjava-2.0.2.jar, net-dns.patch, nif-utils.patch
>
>
> This patch allows for network configuration parameters to be aded to the
> hadoop-site.xml file. These parameters specify a network interface name and
> an optional nameserver hostname which DataNodes and TaskTrackers consult to
> resolve their hostnames from the IP bound to the specified network interface.
> This is useful when machines that are part of different physical or logical
> network need to participate in hadoop clusters as client nodes. The hostname
> and IP reported by InetAddress.getLocalHost() are not necessarily the ones
> that will allow the JobTracker and NameNode to reach the clients, as well as
> not necessarily the ones through which the DFS clients can reach the
> DataNodes.
> The configuration parameters are
> - cluster.report.nif
> - cluster.report.ns
> nif: takes the name of a network interface, like en0, en1 (on macs), eth0,
> etc...
> ns: the host name of a DNS server to use when resolving the IP bound to the
> specified nif
> These parameters are set by default to the value "default" which will
> replicate the current behavior of reporting
> InetAddress.getLocalHost().getHostName() and getHostAddress()
> As part of the patch, a new library dnsjava was added along with its license
> information (BSD license). The list of affected files is:
> src
> org.apache.hadoop.dfs.DataNode
> org.apache.hadoop.mapred.taskTracker
> org.apache.hadoop.util.NetworkUtils
> conf
> hadoop-default.xml
> lib
> dnsjava-2.0.2.jar
> dnsjava-2.0.2.LICENSE.txt
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