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| openstackgerrit | lidong proposed openstack/heat master: Firewall creation failed due to "INACTIVE" https://review.opendev.org/676384 | 06:29 |
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| mhen | hello, can somebody tell me how Heat aggregates the events for stacks? | 06:34 |
| mhen | is it simply polling the APIs (Nova, Cinder etc.) in a regular interval and recording the states of individual resources? | 06:35 |
| ramishra | mhen: those are heat events and not polled from other services, we keep a event log in the database and write to it at different times in the process of resource actions | 07:20 |
| ramishra | if you're talking about heat events api | 07:22 |
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| mhen | ramishra, thanks, yes I'm talking about this API | 07:28 |
| mhen | how does Heat determine the state of resources if it is not polling the other APIs? | 07:28 |
| ramishra | yes it does api calls for getting the status of the async resource operations, if that's what you mean | 07:31 |
| mhen | what I'm wondering is, let's say a Nova server resource transitions between multiple states A > B > C in the process of a task on that resource, how is Heat made aware of each transition? | 07:40 |
| ramishra | We don't keep track of all nova server states, we've basically have four states(status) for heat resources INIT, IN_PROGRESS, COMPLETE, FAILED, we translate nova server states to heat resource states | 07:45 |
| ramishra | https://github.com/openstack/heat/blob/master/heat/engine/resource.py#L969-L986 we keep polling for the status (check_*_complete method diff for every resource), if there is an error we mark it as FAILED | 07:47 |
| ramishra | https://github.com/openstack/heat/blob/master/heat/engine/resources/openstack/nova/server.py#L890-L896 for nova server create | 07:48 |
| ramishra | https://docs.openstack.org/heat/latest/developing_guides/pluginguide.html#life-cycle-handler-methods should help you understand the lifecycle | 07:49 |
| mhen | ramishra, I see now. That has been most helpful, thanks a lot! | 07:51 |
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| ramishra | just a correction there are 3 statuses (IN_PROGRESS, COMPLETE, FAILED) INIT is an action like CREATE/UPDATE/DELETE not an status | 07:53 |
| mhen | ramishra, alright, thanks for the clarification :) | 08:01 |
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| openstackgerrit | Jens Harbott (frickler) proposed openstack/heat master: Stop requiring an identity admin endpoint https://review.opendev.org/675778 | 10:34 |
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