| flwang | zaneb: around? Is there any way to do a pre-update work when doing the rolling_update for resource group? | 00:10 |
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| openstackgerrit | Rico Lin proposed openstack/heat master: [WIP] test zuul migrate https://review.opendev.org/660877 | 06:56 |
| openstackgerrit | Rico Lin proposed openstack/heat master: [Test] Try unlock autoscaling with lb v2 https://review.opendev.org/661683 | 07:10 |
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| openstackgerrit | Marek Lyčka proposed openstack/heat-dashboard master: Implements a JSON import export mechanism for the template generator https://review.opendev.org/611259 | 11:31 |
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| zaneb | flwang: https://docs.openstack.org/heat/latest/template_guide/environment.html#pause-stack-creation-update-or-deletion-on-a-given-resource | 13:33 |
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| openstackgerrit | Zane Bitter proposed openstack/heat master: Update install docs for Keystone v3 https://review.opendev.org/661768 | 14:28 |
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| flwang | zaneb: wonderful, is it a new feature only available in stein | 21:05 |
| zaneb | flwang: no, it's been there for several years afair | 21:05 |
| flwang | zaneb: fantastic, i will give it a try, thank you sooooo much | 21:06 |
| flwang | zaneb: btw, will you join the shanghai kubecon next month? | 21:07 |
| zaneb | unlikely | 21:07 |
| * zaneb is not important enough to send to kubecon ;) | 21:08 | |
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| flwang | zaneb: come on, then i will see you at shanghai openstack summit at Nov | 21:22 |
| zaneb | yes, definitely hoping to be there in Nov :) | 21:25 |
| flwang | zaneb: btw, from the doc https://docs.openstack.org/heat/latest/template_guide/environment.html#pause-stack-creation-update-or-deletion-on-a-given-resource i cannot see where the hooks are defined | 21:54 |
| flwang | for example, if i want to have a pre-update hook for a sever resource, where should I define the hook to let it point to a script ? | 21:55 |
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| flwang | zaneb: seems the 'hook' is the not the one i'm looking for. I'd like to see a hook can be set a script to do something instead of just halt, is that possible? | 23:01 |
| zaneb | flwang: no, it just halts. but: you can set it up to post a notification to Zaqar when it does | 23:08 |
| flwang | zaneb: ok, this is for magnum, actually and we don't have zaqar | 23:10 |
| flwang | the background is, we would like to call kubectl drain to drain a node before we upgrade the base image of the server | 23:10 |
| zaneb | ah, ok. without Zaqar you have to poll the API to see when the breakpoint is hit | 23:10 |
| flwang | otherwise, user may have downtime when doing upgrade | 23:10 |
| zaneb | that's more or less exactly the case the feature is designed for | 23:11 |
| flwang | zaneb: i think it could be a good feature for heat to have a pre-XXX hook to allow setting a script to do cleanup things | 23:11 |
| zaneb | the other option is to put a software deployment inside the scaled unit | 23:11 |
| zaneb | you mean a user-provided script that runs inside the server itself? because that seems like a non-starter to me | 23:12 |
| zaneb | s/server/heat server/ | 23:12 |
| flwang | zaneb: pls take a look at this template https://review.opendev.org/#/c/660851/2/magnum/drivers/k8s_fedora_atomic_v1/templates/kubemaster.yaml@751 | 23:13 |
| flwang | now when doing a heat stack update, if the image of the master server changed, is there any chance the upgrade_kubernetes_deployment being called first? | 23:14 |
| flwang | i just trying to figure out if there is an opportunity that before heat call nova to rebuild a new instance, a script can be called to do something before that | 23:15 |
| zaneb | no because it creates a circular dependency :( | 23:16 |
| zaneb | if you wanted to run the script on a _different_ server you could | 23:16 |
| zaneb | but obviously that doesn't help here | 23:16 |
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