[openstack-dev] [heat] [CustomResource] LifeCycle methods flow

Pavlo Shchelokovskyy pshchelokovskyy at mirantis.com
Wed Nov 26 10:35:05 UTC 2014


Pradip,

https://github.com/openstack/heat/blob/master/heat/engine/resource.py#L473

Basically, it calls handle_create that might return some data, yields, and
than keeps calling check_create_complete with that data returned by
handle_create, yielding control in-between, until check_create_complete
returns True.

Best regards,
Pavlo Shchelokovskyy.

On Wed, Nov 26, 2014 at 12:20 PM, Pradip Mukhopadhyay <
pradip.interra at gmail.com> wrote:

> Hello,
>
>
>
> Any pointer (document and/or code pointer) related to how the different
> overridden methods are getting called when a custom resource is getting
> deployed in the heat stack?
>
>
> Basically just tried to annotate the h-eng log on a simple,
> very-first-attempt 'hello world' resource. Noticed the log is something
> like:
>
> 2014-11-26 15:38:30.251 INFO heat.engine.plugins.helloworld [-]
> [pradipm]:Inside handle_create
> 2014-11-26 15:38:30.257 INFO heat.engine.plugins.helloworld [-]
> [pradipm]:Inside _set_param_values
> 2014-11-26 15:38:31.259 INFO heat.engine.plugins.helloworld [-]
> [pradipm]:Inside check_create_complete
> 2014-11-26 15:38:44.227 INFO heat.engine.plugins.helloworld
> [req-9979deb9-f911-4df4-bdf8-ecc3609f054b None demo] [pradipm]:Inside
> HelloWorld ctor
> 2014-11-26 15:38:44.234 INFO heat.engine.plugins.helloworld
> [req-9979deb9-f911-4df4-bdf8-ecc3609f054b None demo] [pradipm]:Inside
> _resolve_attribute
>
>
>
>
> The constructor (ctor) is getting called in the flow after the
> create-resource. So though understanding the flow would help.
>
>
>
> Thanks in advance,
> Pradip
>
>
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>
>


-- 
Pavlo Shchelokovskyy
Software Engineer
Mirantis Inc
www.mirantis.com
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