knative / knative/serving

[failure mode] revisions that fail to scale up from 0 should set Ready=False

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#11,531 3 comments 0 reactions 0 assignees View on GitHub

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area/API kind/spec triage/accepted
Dominant language
Go
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Avg merge
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Merged PRs (30d)
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Description

After a successful initial deploy and scale to zero - if a revision were to fail to scale from 0 a second time we should mark Ready=False.

This intent of this issue is to confirm what is the current behaviour is when readiness & liveness probes fail.

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

No source file, test, or entry point is named. Start by tracing revision readiness handling after scale-to-zero and review the existing readiness and liveness probe behavior; done means confirming the current behavior and ensuring a second scale-from-zero failure marks the revision Ready=False.

Written by the indexing model from the issue text.

Assessment

Tech stack
go, kubernetes
Domain
api, backend
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
30/100

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