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https://issues.apache.org/jira/browse/HDFS-3146?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Eli Collins updated HDFS-3146:
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Attachment: hdfs-3146.txt
Patch attached.
> Datanode should be able to register multiple network interfaces
> ---------------------------------------------------------------
>
> Key: HDFS-3146
> URL: https://issues.apache.org/jira/browse/HDFS-3146
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: data-node
> Reporter: Eli Collins
> Assignee: Eli Collins
> Attachments: hdfs-3146.txt
>
>
> The Datanode should register multiple interfaces with the Namenode (who then
> forwards them to clients). We can do this by extending the DatanodeID, which
> currently just contains a single interface, to contain a list of interfaces.
> For compatibility, the DatanodeID method to get the DN address for data
> transfer should remain unchanged (multiple interfaces are only used where the
> client explicitly takes advantage of them).
> By default, if the Datanode binds on all interfaces (via using the wildcard
> in the dfs*address configuration) all interfaces are exposed, modulo ones
> like the loopback that should never be exposed. Alternatively, a new
> configuration parameter ({{dfs.datanode.available.interfaces}}) allows the
> set of interfaces can be specified explicitly in case the user only wants to
> expose a subset. If the new default behavior is too disruptive we could
> default dfs.datanode.available.interfaces to be the IP of the IPC interface
> which is the only interface exposed today (per HADOOP-6867, only the port
> from dfs.datanode.address is used today).
> The interfaces can be specified by name (eg "eth0"), subinterface name (eg
> "eth0:0"), or IP address. The IP address can be specified by range using CIDR
> notation so the configuration values are portable.
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