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Date: Mon, 2 Feb 2015 17:26:36 +0000 (UTC)
From: "Dima Spivak (JIRA)" <jira@apache.org>
To: issues@hbase.apache.org
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Subject: [jira] [Commented] (HBASE-12954) Ability impaired using HBase on
 multihomed hosts
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    [ https://issues.apache.org/jira/browse/HBASE-12954?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14301485#comment-14301485 ] 

Dima Spivak commented on HBASE-12954:
-------------------------------------

Seeing as how [~clayb] marked this as affecting a 0.98 release, do you see this going into master alone, [~tedyu] or other branches, as well? If others, what implications would it have for wire compatibility?

> Ability impaired using HBase on multihomed hosts
> ------------------------------------------------
>
>                 Key: HBASE-12954
>                 URL: https://issues.apache.org/jira/browse/HBASE-12954
>             Project: HBase
>          Issue Type: Bug
>    Affects Versions: 0.98.4
>            Reporter: Clay B.
>            Assignee: Ted Yu
>            Priority: Minor
>         Attachments: 12954-v1.txt, Hadoop Three Interfaces.png
>
>
> For HBase clusters running on unusual networks (such as NAT'd cloud environments or physical machines with multiple IP's per network interface) it would be ideal to have a way to both specify:
> # which IP interface to which HBase master or region-server will bind
> # what hostname HBase will advertise in Zookeeper both for a master or region-server process
> While efforts such as HBASE-8640 go a long way to normalize these two sources of information, it is not possible in the current design of the properties available to an administrator for these to be unambiguously specified.
> One has been able to request {{hbase.master.ipc.address}} or {{hbase.regionserver.ipc.address}} but one can not specify the desired HBase {{hbase.master.hostname}}. (It was removed in HBASE-1357, further I am unaware of a region-server equivalent.)
> I use a configuration management system to generate all of my configuration files on a per-machine basis. As such, an option to generate a file specifying exactly which hostname to use would be helpful.
> Today, specifying the bind address for HBase works and one can use an HBase-only DNS for faking what to put in Zookeeper but this is far from ideal. Network interfaces have no intrinsic IP address, nor hostname. Specifing a DNS server is awkward as the DNS server may differ from the system's resolver and is a single IP address. Similarly, on hosts which use a transient VIP (e.g. through keepalived) for other services, it means there's a seemingly non-deterministic hostname choice made by HBase depending on the state of the VIP at daemon start-up time.
> I will attach two networking examples I use which become very difficult to manage under the current properties.


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