[jira] [Commented] (YARN-1994) Expose YARN/MR endpoints on multiple interfaces

["Naganarasimha G R (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/YARN-1994?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14902369#comment-14902369 ] 

Naganarasimha G R commented on YARN-1994:
-----------------------------------------

Hi [~cwelch] & [~arpitagarwal],
I have few doubts for configuring NM_BIND_HOST & NM_ADDRESS as per the existing trunk/branch 2 code 
{code}
if (bindHost != null && !bindHost.isEmpty()
        && nmAddress != null && !nmAddress.isEmpty()) {
            hostOverride = nmAddress.split(":")[0];
    }
// setup node ID
    InetSocketAddress connectAddress;
    if (delayedRpcServerStart) {
      connectAddress = NetUtils.getConnectAddress(initialAddress);
    } else {
      server.start();
      connectAddress = NetUtils.getConnectAddress(server);
    }
    NodeId nodeId = buildNodeId(connectAddress, hostOverride);
{code}
# IIUC  if NM_BIND_HOST is 0.0.0.0 then NM_ADDRESS's host part needs to be used for NODE_ID but what if proper IP is configured for NM_BIND_HOST then is it correct to take NM_ADDRESS's host part ? Is it assumed that NM_BIND_HOST is configured to specific IP then NM_ADDRESS is also configured to the same IP ?
# May be this a layman question why is it required to bind to all/multiple interfaces ?

> Expose YARN/MR endpoints on multiple interfaces
> -----------------------------------------------
>
>                 Key: YARN-1994
>                 URL: https://issues.apache.org/jira/browse/YARN-1994
>             Project: Hadoop YARN
>          Issue Type: Improvement
>          Components: nodemanager, resourcemanager, webapp
>    Affects Versions: 2.4.0
>            Reporter: Arpit Agarwal
>            Assignee: Craig Welch
>             Fix For: 2.6.0
>
>         Attachments: YARN-1994.0.patch, YARN-1994.1.patch, YARN-1994.11.patch, YARN-1994.11.patch, YARN-1994.12.patch, YARN-1994.13.patch, YARN-1994.14.patch, YARN-1994.15-branch2.patch, YARN-1994.15.patch, YARN-1994.2.patch, YARN-1994.3.patch, YARN-1994.4.patch, YARN-1994.5.patch, YARN-1994.6.patch, YARN-1994.7.patch
>
>
> YARN and MapReduce daemons currently do not support specifying a wildcard address for the server endpoints. This prevents the endpoints from being accessible from all interfaces on a multihomed machine.
> Note that if we do specify INADDR_ANY for any of the options, it will break clients as they will attempt to connect to 0.0.0.0. We need a solution that allows specifying a hostname or IP-address for clients while requesting wildcard bind for the servers.
> (List of endpoints is in a comment below)



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