[Users] Putting the host in maintenance mode via python SDK

[Michael Pasternak]

On 07/02/2013 07:38 AM, Deepthi Dharwar wrote:
> On 07/01/2013 06:08 PM, Michael Pasternak wrote:
>> On 07/01/2013 02:37 PM, Vladimir Vyazmin wrote:
>>> Hi,
>>>
>>> There is any a via pythonSDK to put the host in maintenance mode:
>>>
>>> hostObject = API.hosts.get(fakeHostNames)
>>>
>>> turboMaintenanceHost(hostObject)
>>>
>>> ##### Turbo Maintenance Host #####
>>> def turboMaintenanceHost(vmObject):
>>>     """ maintenance Host"""
>>>     if vmObject.status.state == 'up':
>>>         vmObject.deactivate()
>>>         LOGGER.info(TimestampScale() + "Object '%s' maintenance." % vmObject.name)
>>>     else:
>>>         LOGGER.warning(TimestampScale() + "Failed maintenance '%s' Object." % vmObject.name)
>>>     return True
>>>
> 
> Thanks for this piece of code. Shall give it a try.
> 
>>>
>>>
>>>
>>> ----- Original Message -----
>>>> From: "Deepthi Dharwar" <deepthi at linux.vnet.ibm.com>
>>>> To: users at ovirt.org, "Michael Pasternak" <mpastern at redhat.com>
>>>> Sent: Monday, July 1, 2013 2:13:09 PM
>>>> Subject: [Users] Putting the host in maintenance mode via python SDK
>>>>
>>>> Hi,
>>>>
>>>> I am trying to switch off Hosts in DC which are idle.
>>>>
>>>> I wanted to know as to why start/stop of hosts options are enabled in
>>>> Power Mgmt tab only when the host is in Maintenance mode and not otherwise.
>>
>> cause you don't want to kill all vms running on this host when switching it off,
>> moving host to the maintenance mode will make them migrating to other host/s in
>> the cluster,
>>
>> actually there are much more scenarios where you want to be sure that you can
>> safely switch off the host.
> 
> So as I understand, issuing a STOP just halts the host but not migrate
> VMs . This needs to be done by putting the host in the maintenance mode
> where all the VMs running are migrated. Host is disconnected from the
> storage pool after which one can shut-down the system.
> 
> Maintenance is per-requisite mode where u explicitly tell the engine
> to migrate the VMs and disconnect host from storage and not done as part
> of integral shutdown process.

correct.

> 
>>>>
>>>> Also, is there any way via pythonSDK to put the host in maintenance mode ?
>>>>
>>>> Regards,
>>>> Deepthi
>>>>
>>>> _______________________________________________
>>>> Users mailing list
>>>> Users at ovirt.org
>>>> http://lists.ovirt.org/mailman/listinfo/users
>>>>
>>>
>>
>>
> 


-- 

Michael Pasternak
RedHat, ENG-Virtualization R&D