[Users] Is there a way to force remove a host?

Itamar Heim iheim at redhat.com
Mon Sep 24 22:07:24 UTC 2012 

On 09/25/2012 12:03 AM, Jason Brooks wrote:
> On Mon 24 Sep 2012 02:55:54 PM PDT, Itamar Heim wrote:
>> On 09/24/2012 11:53 PM, Jason Brooks wrote:
>>> On Mon 24 Sep 2012 01:24:44 PM PDT, Itamar Heim wrote:
>>>> On 09/24/2012 08:49 PM, Dominic Kaiser wrote:
>>>>> This conversation is fine but if I want to force remove no matter
>>>>> what I
>>>>> should be able to from the GUI.  The nodes are no longer available I
>>>>> want to get rid of them ovirt does not let me.  I can delete from
>>>>> database but why not from the GUI?  I am sure others may run into this
>>>>> problem as well.
>>>>
>>>> what happens to the status of the host when you right click on the
>>>> host and specify you confirm it was shutdown?
>>>
>>> I'm having this same issue. Confirming the host is shut down doesn't
>>> make a difference.
>>>
>>> I'm seeing lots of "Failed to GlusterHostRemoveVDS, error = Unexpected
>>> exception" errors in my engine log that seem to correspond w/ the failed
>>> remove host attempts.
>>
>> is cluster defined as gluster as well?
>
> Yes, it is.

that's a very important piece of information...
is there a more detailed exception in the log on the error?
can you uncheck gluster and try to remove it again?

Dominic - are you also using a cluster with gluster service enabled?


>
>> what is the status of the host after you confirm shutdown?
>> any error on log on this specific command?
>
> I have two hosts I want to remove -- one, a failed add that never
> completed, and the other, an F17 machine that I subsequently updated to
> F18. So neither of those hosts are actually connected to my engine.
> Their status is either non-responsive or maintenance, if I activate,
> it's the former, if I set it to maintenance, it's the latter. I can only
> attempt to remove in maintenance mode, so that's where I have them.
>
> There don't appear to be any errors confirming manual reboot.
>
>>
>> shireesh - not sure if relevant to this flow, but need to make sure
>> removing a host from the engine isn't blocked on gluster needing to
>> remove it from the gluster cluster if the host is not available any
>> more, or last host in gluster cluster?
>>
>>>
>>>
>>>>
>>>>>
>>>>> Dominic
>>>>>
>>>>> On Sep 22, 2012 4:19 PM, "Eli Mesika" <emesika at redhat.com
>>>>> <mailto:emesika at redhat.com>> wrote:
>>>>>
>>>>>
>>>>>
>>>>>     ----- Original Message -----
>>>>>      > From: "Douglas Landgraf" <dougsland at redhat.com
>>>>>     <mailto:dougsland at redhat.com>>
>>>>>      > To: "Dominic Kaiser" <dominic at bostonvineyard.org
>>>>>     <mailto:dominic at bostonvineyard.org>>
>>>>>      > Cc: "Eli Mesika" <emesika at redhat.com
>>>>>     <mailto:emesika at redhat.com>>, users at ovirt.org
>>>>>     <mailto:users at ovirt.org>, "Robert Middleswarth"
>>>>>     <robert at middleswarth.net <mailto:robert at middleswarth.net>>
>>>>>      > Sent: Friday, September 21, 2012 8:12:27 PM
>>>>>      > Subject: Re: [Users] Is there a way to force remove a host?
>>>>>      >
>>>>>      > Hi Dominic,
>>>>>      >
>>>>>      > On 09/20/2012 12:11 PM, Dominic Kaiser wrote:
>>>>>      > > Sorry I did not explain.
>>>>>      > >
>>>>>      > > I had tried to remove the host and had not luck
>>>>> troubleshooting it.
>>>>>      > >  I
>>>>>      > > then had removed it and used it for a storage unit
>>>>> reinstalling
>>>>>      > > fedora
>>>>>      > > 17.  I foolishly thought that I could just remove the host
>>>>>      > > manually.
>>>>>      > >  It physically is not there. (My fault I know)  Is there a
>>>>> way that
>>>>>      > > you know of to remove a host brute force.
>>>>>      > >
>>>>>      > > dk
>>>>>      >
>>>>>      > Fell free to try the below script (not part of official
>>>>> project) for
>>>>>      > brute force:
>>>>>      >
>>>>>      > (from the engine side)
>>>>>      > # yum install python-psycopg2 -y
>>>>>      > # wget
>>>>>      >
>>>>>
>>>>> https://raw.github.com/dougsland/misc-rhev/master/engine_force_remove_Host.py
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>      > # (edit the file and change the db password)
>>>>>      > # python ./engine_force_remove_Host.py
>>>>>
>>>>>     Hi , had looked in the Python script you had provided:
>>>>>     First, I must say that handling the database directly may leave DB
>>>>>     in inconsistent state, therefore, if there is no other option, the
>>>>>     database should be backed up prior to this operation.
>>>>>     In addition, I do not like the execution of the SQL statements in
>>>>>     the script.
>>>>>     There is a SP called DeleteVds(v_vds_id UUID) and you should use
>>>>>     that since it encapsulates all details.
>>>>>     For example, your script does not handle permission clean-up as
>>>>> the
>>>>>     SP does and therefore leaves garbage in the database.
>>>>>     In addition, a failure in your script may leave database in
>>>>>     inconsistent state while the SP is executed in one transaction and
>>>>>     will leave DB consistent.
>>>>>     So, in short I would prefer in this case that the relevant SP will
>>>>>     do the clean-up since this is the one that is used by the code and
>>>>>     that insures (at least I hope so) , that all related entities are
>>>>>     removed as well.
>>>>>
>>>>>
>>>>>      >
>>>>>      > Thanks
>>>>>      >
>>>>>      > --
>>>>>      > Cheers
>>>>>      > Douglas
>>>>>      >
>>>>>      >
>>>>>
>>>>>
>>>>>
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>>>>> http://lists.ovirt.org/mailman/listinfo/users
>>>>>
>>>>
>>>>
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>>>
>>> --
>>>
>>> @jasonbrooks
>>
>>
>
>
>
> --
>
> @jasonbrooks

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