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

Tue Sep 25 01:27:05 UTC 2012

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

Yes Gluster Service is enabled.  And I can not remove hosts from that
cluster.

Dominic

On Mon, Sep 24, 2012 at 6:07 PM, Itamar Heim <iheim at redhat.com> wrote:

> 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@**bostonvineyard.org <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<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<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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>>>>>>
>>>>>>
>>>>>
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>>>>>
>>>>
>>>>
>>>>
>>>> --
>>>>
>>>> @jasonbrooks
>>>>
>>>
>>>
>>>
>>
>>
>> --
>>
>> @jasonbrooks
>>
>
>
>

-- 
Dominic Kaiser
Greater Boston Vineyard
Director of Operations

cell: 617-230-1412
fax: 617-252-0238
email: dominic at bostonvineyard.org
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