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From Sumit Mohanty <smoha...@hortonworks.com>
Subject Re: Host re-installation
Date Fri, 21 Mar 2014 18:06:12 GMT
Oh! so I assume, after OS re-install, you installed/started the agent
manually.

What components are on this host?


On Fri, Mar 21, 2014 at 10:59 AM, Anoop Rajendra
<anoop.rajendra@gmail.com>wrote:

> Actually, I solved the problem without deleting the host.
>
> I stopped the service, and restarted it, and apparently that was
> enough to get the components installed  on the newly reinstalled host.
>
> -a
>
> On Fri, Mar 21, 2014 at 10:52 AM, Sumit Mohanty
> <smohanty@hortonworks.com> wrote:
> > When you do add host, you can install components on the host.
> >
> > Assuming you did not do a "Delete Host" when the host was taken out,
> Ambari
> > still thinks that the components are deployed on the host. It is
> reacting to
> > the fact that there is no agent heartbeat and thus has marked those
> > components to be in Unknown state.
> >
> > What were deployed on the host before? Can you also share the "Host" UI
> page
> > - it will give me a good idea of the current state.
> >
> >
> > On Fri, Mar 21, 2014 at 10:47 AM, Anoop Rajendra <
> anoop.rajendra@gmail.com>
> > wrote:
> >>
> >> Does this mean that I have to re-associate the services to the host?
> >>
> >> -a
> >>
> >> On Fri, Mar 21, 2014 at 10:39 AM, Sumit Mohanty
> >> <smohanty@hortonworks.com> wrote:
> >> > You can use Ambari support for add/remove host.
> >> >
> >> > For example, if you have not removed (using Ambari) the host already
> you
> >> > can
> >> > do so now in the "host" page through Delete Host.
> >> >
> >> > After that you can do a "Add Host" on the "hosts" and add the host
> back.
> >> > "Add Host" will install agent and install components based on what you
> >> > choose.
> >> >
> >> >
> >> >
> >> > On Fri, Mar 21, 2014 at 10:32 AM, Anoop Rajendra
> >> > <anoop.rajendra@gmail.com>
> >> > wrote:
> >> >>
> >> >> Hi,
> >> >>
> >> >> I had to take down a host from a running cluster for maintenance.
> Once
> >> >> I re-installed the OS on it. I'd like to bring it back to the same
> >> >> state as the host was before reinstallation.
> >> >>
> >> >> I can't seem to find hooks in Ambari to bring the host back into the
> >> >> HDP cluster. How do I do this?
> >> >>
> >> >> I'm using Ambari 1.4.4.32 and HDP 2.0.6.1
> >> >>
> >> >> -a
> >> >
> >> >
> >> >
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