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From "Tamas Penzes (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HBASE-17391) [Shell] Add shell command to get list of servers, with filters
Date Wed, 16 Aug 2017 09:07:01 GMT

     [ https://issues.apache.org/jira/browse/HBASE-17391?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Tamas Penzes updated HBASE-17391:
---------------------------------
    Labels: beginner  (was: beginner beginners)

> [Shell] Add shell command to get list of servers, with filters
> --------------------------------------------------------------
>
>                 Key: HBASE-17391
>                 URL: https://issues.apache.org/jira/browse/HBASE-17391
>             Project: HBase
>          Issue Type: Improvement
>          Components: shell
>    Affects Versions: 1.3.0
>            Reporter: Lars George
>              Labels: beginner
>
> For some operations, for example calling {{update_config}}, the user needs to specify
the full server name. For region servers that is easier to find, but not so much for the master
(using {{zk_dump}} works but is noisy). It woould be good to add a utility call that lists
the servers, preferably with an optional filter (a regexp, server type, or globbing style
format) that allows to whittle down the potentially long is of servers. For example:
> {noformat}
> hbase(main):001:0> list_servers "master"
> master-1.internal.larsgeorge.com,16000,1483018890074
> hbase(main):002:0> list_servers "rs"
> slave-1.internal.larsgeorge.com,16020,1482996572051
> slave-3.internal.larsgeorge.com,16020,1482996572481
> slave-2.internal.larsgeorge.com,16020,1482996570909
> hbase(main):003:0> list_servers "rs:s.*\.com.*"
> slave-1.internal.larsgeorge.com,16020,1482996572051
> slave-3.internal.larsgeorge.com,16020,1482996572481
> slave-2.internal.larsgeorge.com,16020,1482996570909
> hbase(main):004:0> list_servers ":.*160?0.*"
> master-1.internal.larsgeorge.com,16000,1483018890074
> slave-1.internal.larsgeorge.com,16020,1482996572051
> slave-3.internal.larsgeorge.com,16020,1482996572481
> slave-2.internal.larsgeorge.com,16020,1482996570909
> {noformat}
> I could imagine to have {{master}}, {{backup-master}}, {{rs}}, and maybe even {{zk}}
too. The optional regexp shown uses a colon as a divider. This combines the "by-type", and
using a filter. Example #4 skips the type and only is using the filter.
> Of course, you could also implement this differently, say with two parameters... just
suggesting.



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