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Remove the scale-to-zero checking in conformance. #13025

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merged 1 commit into from
Jun 13, 2022

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Conformance should be a measurement of the Knative API and runtime semantics, not the details of how those semantics are implemented. Scaling to zero is effectively a cost optimization, but should not be a requirement of a
conforming implementation.

For instance, if I were to set min-scale: "1" cluster-wide, I should still have a conformant implementation, since the key semantics of the API are still preserved.

Release Note

API conformance no longer checks for scaling to zero in the presence of runtime probes

@knative-prow knative-prow bot added size/S Denotes a PR that changes 10-29 lines, ignoring generated files. area/test-and-release It flags unit/e2e/conformance/perf test issues for product features labels Jun 12, 2022
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codecov bot commented Jun 12, 2022

Codecov Report

Merging #13025 (b064aae) into main (2f7b6db) will decrease coverage by 0.03%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main   #13025      +/-   ##
==========================================
- Coverage   87.03%   87.00%   -0.04%     
==========================================
  Files         197      197              
  Lines       14439    14439              
==========================================
- Hits        12567    12562       -5     
- Misses       1578     1582       +4     
- Partials      294      295       +1     
Impacted Files Coverage Δ
pkg/reconciler/configuration/configuration.go 83.67% <0.00%> (-1.54%) ⬇️
pkg/activator/net/revision_backends.go 92.19% <0.00%> (-0.58%) ⬇️

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Conformance should be a measurement of the Knative API and runtime semantics, not the details of how those semantics are implemented.  Scaling to zero is effectively a cost optimization, but should not be a requirement of a
conforming implementation.

For instance, if I were to set `min-scale: "1"` cluster-wide, I should still have a conformant implementation, since the key semantics of the API are still preserved.
@knative-prow knative-prow bot added size/M Denotes a PR that changes 30-99 lines, ignoring generated files. and removed size/S Denotes a PR that changes 10-29 lines, ignoring generated files. labels Jun 12, 2022
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/cc @dprotaso
/assign @dprotaso

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@knative-prow knative-prow bot added the lgtm Indicates that a PR is ready to be merged. label Jun 13, 2022
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knative-prow bot commented Jun 13, 2022

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: mattmoor, psschwei

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@knative-prow knative-prow bot added the approved Indicates a PR has been approved by an approver from all required OWNERS files. label Jun 13, 2022
@knative-prow knative-prow bot merged commit d54ad4c into knative:main Jun 13, 2022
@mattmoor mattmoor deleted the remove-scale-to-zero-check branch June 13, 2022 14:40
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3 participants