Kubernetes SIG/Meetings/2023-06-27

< Kubernetes SIG

Attendees: Brian King Ben Tullis Alexandros Kosiaris Stef Dunlap Andrew Otto Ryan Kemper

Agenda:

Introductions for new members (if any)
SIG administrivia:
- Alex won’t be running these meetings in September-November.
- ~~Alex still has a TODO to make a draft policy the helm decision. Page will be~~ https://wikitech.wikimedia.org/wiki/Kubernetes/Upstream_Helm_charts_policy

Misc:
- [Stef] Magic trick: KEDA HTTP autoscaler
  - Immediate use case: Running out of resources in staging, silly because the deployments are barely used. Would like to scale down to nothing when not in use.
  - KEDA is an k8s autoscaler
  - KEDA-HTTP autoscaler not for production, experimental
  - If no resources allocated, KEDA-HTTP will pause incoming HTTP request as it spawns resources
  - AW Gitlab Bot from gerrit patch.
    - Creates link to Environment: aw-930161.wmcloud.org, which will spin up MW using that patch.
    - https://gitlab.wikimedia.org/repos/abstract-wiki/aw-ci-chart/-/blob/main/templates/wikifunctions.yaml
  - AO: can we use this pattern to deploy other things from CI?
    - Stef: yes, but if you don’t need scale down to 0, you might just be able to make CI do an actual temporary deployment.
  - AK: how does it work?
    - https://github.com/kedacore/http-add-on/blob/main/docs/design.md#architecture-overview
  - BK: do we have any auto scaling at WMF now?
    - AK: not really, we do have one use case: video scaling. When lots of work, we just throttle.
- BK: alternate container runtimes?
  - AK: looked a bit, looking at containerd as a side project. Feels very close to docker, mostly. It has namespaces? Might be making an OKR for the next quarter. Want to use gadvisor(?) for wikifunctions.
- AK: I am going on sabbatical starting sept. 8. Janis will be replacing me as meeting leader.
Topic: <no specific topic was discussed>

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