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Posted to dev@slider.apache.org by Rui Zhang <rz...@vertica.com> on 2014/07/18 21:19:19 UTC

Convenient way to know the number of running instances for a role

Hi,

Is there a convenient way to know the number of running instances for a 
role? Such as REST APIs?

Thanks

-- 
Rui Zhang
Software engineer Intern
Vertica, an HP Company
rzhang@vertica.com

Re: Convenient way to know the number of running instances for a role

Posted by Ted Yu <yu...@gmail.com>.

See description on status action here:
http://slider.incubator.apache.org/docs/manpage.html

In its output, you can find more than one place where running instance
information can be found:

  "statistics" : {
    "HBASE_REGIONSERVER" : {
      "containers.start.started" : 1,
      "containers.live" : 1,
      "containers.start.failed" : 0,
      "containers.active.requests" : 0,
      "containers.failed" : 0,
      "containers.completed" : 0,
      "containers.desired" : 1,
      "containers.requested" : 1
    },

  "instances" : {
    "HBASE_REGIONSERVER" : [ "container_1403300788015_0005_01_000004" ],
    "HBASE_MASTER" : [ "container_1403300788015_0005_01_000003",
"container_1403300788015_0005_01_000002" ],
    "slider-appmaster" : [ "container_1403300788015_0005_01_000001" ]
  },

Cheers


On Fri, Jul 18, 2014 at 12:19 PM, Rui Zhang <rz...@vertica.com> wrote:

> Hi,
>
> Is there a convenient way to know the number of running instances for a
> role? Such as REST APIs?
>
> Thanks
>
> --
> Rui Zhang
> Software engineer Intern
> Vertica, an HP Company
> rzhang@vertica.com
>
>