openstack team mailing list archive

[Alessandro Tagliapietra <tagliapietra.alessandro@xxxxxxxxx>]

Il giorno 26/lug/2012, alle ore 04:59, Angus Salkeld ha scritto:

> On 24/07/12 12:12 -0700, Steven Dake wrote:
>> On 07/24/2012 10:08 AM, Alessandro Tagliapietra wrote:
>>> But i don't see any part (except the future plans) talking about HA at instance level, that seems more to an application level
>>> 
>> 
>> Currently heat's healthchecking is application only, but we do intend to
>> improve instance healthchecking in v6.  We are currently in our v5
>> development which concludes on July 30th.  We have 4-5 week development
>> windows.  I'll make certain vm healthchecking is solid for v6 around
>> August.  However, we may be able to fit into v5 - I'll have to check
>> with the main author of the HA feature (Angus Salkeld).
> 
> I have just added a template demonstating an instance sending
> healthchecks and getting restarted if it fails to send a healthcheck
> within a specified period.
> 
> https://github.com/heat-api/heat/blob/master/templates/WordPress_Single_Instance_With_IHA.template
> 
> (just to give you another option).

Thanks for that but I don't think that just restarting starts the vm on the other node if it fails.

Best
-- 
Alessandro Tagliapietra | VISup srl
piazza 4 novembre 7
20124 Milano

http://www.visup.it


> 
> -Angus
> 
>> 
>> The HA feature HOWTO is described a bit here:
>> 
>> https://github.com/heat-api/heat/wiki/Using-HA
>> 
>> An example HA application template is here:
>> 
>> https://github.com/heat-api/heat/blob/master/templates/WordPress_Single_Instance_With_HA.template
>> 
>> This template launches a wordpress cloud application.  If httpd or mysql
>> fail, they are restarted.  If they fail 3 times in 5 minutes, the entire
>> VM is restarted (this is called escalation) under the assumption that
>> the VM container is defective in some way.
>> 
>> Regards
>> -steve
>> 
>>> Il giorno 24/lug/2012, alle ore 18:56, Jay Pipes ha scritto:
>>> 
>>>> On 07/24/2012 12:52 PM, Alessandro Tagliapietra wrote:
>>>>> Thank you Jay, never read about that.
>>>>> Seems something like scalr/chef? WHich handles application and keeps a minimum number of vm running?
>>>> 
>>>> Yeah, kinda.. just one more way of doing things... :)
>>>> -jay
>>> 
>>> 
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>> 
>> 
>> 
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