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| openstackgerrit | Dirk Mueller proposed openstack/mistral master: Use mock for HTTP calls in unit tests https://review.openstack.org/510351 | 00:25 |
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| openstackgerrit | Dirk Mueller proposed openstack/mistral master: Fix yaql / json_pp deprecation warning https://review.openstack.org/519838 | 00:25 |
| openstackgerrit | OpenStack Proposal Bot proposed openstack/mistral master: Updated from global requirements https://review.openstack.org/519786 | 00:26 |
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| openstackgerrit | OpenStack Proposal Bot proposed openstack/python-mistralclient master: Updated from global requirements https://review.openstack.org/519805 | 00:41 |
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| openstackgerrit | OpenStack Proposal Bot proposed openstack/mistral master: Updated from global requirements https://review.openstack.org/519786 | 01:39 |
| openstackgerrit | OpenStack Proposal Bot proposed openstack/python-mistralclient master: Updated from global requirements https://review.openstack.org/519805 | 01:53 |
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| openstackgerrit | Renat Akhmerov proposed openstack/mistral master: Add a periodic job to check workflow execution integrity https://review.openstack.org/519225 | 05:01 |
| openstackgerrit | Renat Akhmerov proposed openstack/mistral master: Add a periodic job to check workflow execution integrity https://review.openstack.org/519225 | 05:20 |
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| openstackgerrit | byhan proposed openstack/mistral master: Fix wf_trace info adding useless space at some conditions https://review.openstack.org/519975 | 05:57 |
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| openstackgerrit | Renat Akhmerov proposed openstack/mistral master: Add a periodic job to check workflow execution integrity https://review.openstack.org/519225 | 08:40 |
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| openstackgerrit | Dai Dang Van proposed openstack/mistral master: Implement policy in code (1) https://review.openstack.org/509325 | 09:08 |
| openstackgerrit | byhan proposed openstack/mistral master: Modify log infomation to achieve the same format https://review.openstack.org/520016 | 09:16 |
| openstackgerrit | Mehdi Abaakouk (sileht) proposed openstack/mistral master: gnocchi: fix client options https://review.openstack.org/488307 | 09:52 |
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| xavierhardy | Hi everyone, this old blueprint claims that all Mistral nodes can be made highly available: https://specs.openstack.org/openstack/mistral-specs/specs/pike/approved/ha.html | 10:40 |
| xavierhardy | OK for the API and the executors | 10:40 |
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| xavierhardy | but what about the engine and the event-engine? Can I just add more instances of those? How is HA handled (lock mechanism, master/slave...?) for those nodes? | 10:41 |
| xavierhardy | rakhmerov? | 10:42 |
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| rakhmerov | xavierhardy: hi | 11:16 |
| xavierhardy | Hi | 11:17 |
| rakhmerov | engine tier scales as well, yes | 11:17 |
| rakhmerov | event-engine, no | 11:17 |
| rakhmerov | we're now testing the huge load with up to 10 Mistral engines and it works well on the stable topology or with positive additions (adding more nodes) | 11:18 |
| rakhmerov | there are some known issues though when nodes leave the cluster | 11:18 |
| rakhmerov | running workflows can get stuck in RUNNING state | 11:18 |
| rakhmerov | as far as how it's handled, architecturally engines are stateless so they can scale "kind of" linearly | 11:19 |
| rakhmerov | w/o assigning any master or slave roles | 11:19 |
| xavierhardy | "running workflows can get stuck in RUNNING state" yes I have seen that | 11:22 |
| xavierhardy | but the same applies with one instance of engine | 11:22 |
| xavierhardy | (working with containers for instance) | 11:22 |
| xavierhardy | when rolling a new version | 11:22 |
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| xavierhardy | So I just need to scale up my "engine" instances and it should be OK ? | 11:23 |
| xavierhardy | For the event-engine, one simple technique is to have a distributed lock mechanism so that only one instance can emit an event at a time. | 11:24 |
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| openstackgerrit | Renat Akhmerov proposed openstack/mistral master: Add a periodic job to check workflow execution integrity https://review.openstack.org/519225 | 11:31 |
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| rakhmerov | xavierhardy: yes | 11:32 |
| xavierhardy | Great to know | 11:32 |
| rakhmerov | (on scaling engines) | 11:32 |
| xavierhardy | Thanks | 11:32 |
| rakhmerov | yep ) | 11:32 |
| rakhmerov | as far event-engine, I can't even officially recommend to use it really | 11:33 |
| rakhmerov | it's been considered like an experiment functionality | 11:33 |
| rakhmerov | it wasn't designed with HA in mind and it may not address some other concerns too | 11:33 |
| xavierhardy | "event-engine" does not seem to work with non-keystone authentication | 11:33 |
| xavierhardy | BTW | 11:33 |
| rakhmerov | yes | 11:33 |
| rakhmerov | and that too | 11:33 |
| rakhmerov | so, that's the reason we didn't put it into docs yet etc. | 11:34 |
| rakhmerov | d0ugal: hi Dougal, can you please review https://review.openstack.org/#/c/519225/ ? | 11:34 |
| rakhmerov | it's pretty important for us, really | 11:34 |
| rakhmerov | solves a huge problem | 11:34 |
| rakhmerov | d0ugal: and also it would be cool if you could look at this failure: http://logs.openstack.org/25/519225/12/check/openstack-tox-py27/593a426/testr_results.html.gz | 11:34 |
| rakhmerov | I'm not sure why it happens, but it happens once in a while, especially with unit-[postgres|mysql] tests | 11:35 |
| xavierhardy | OK, good | 11:36 |
| d0ugal | rakhmerov: sure, I'll take a look today | 11:37 |
| rakhmerov | thanks! | 11:37 |
| rakhmerov | xavierhardy: np | 11:37 |
| xavierhardy | I need to take some time to clean up, rebase and test my change requests and after that, I'll try to fix the event engine for our use case. | 11:37 |
| xavierhardy | Thanks | 11:37 |
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| openstackgerrit | OpenStack Proposal Bot proposed openstack/python-mistralclient master: Updated from global requirements https://review.openstack.org/519805 | 12:01 |
| rakhmerov | d0ugal: ooh, I guess https://review.openstack.org/#/c/519838/ fixes the second problem I mentioned | 12:07 |
| rakhmerov | so it's ok | 12:07 |
| d0ugal | oh, good :) | 12:07 |
| rakhmerov | yeah, just saw this patch | 12:08 |
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