Autoscaler considers reserved and pending replicas

[pierDipi]

Fixes #6733

• Make autoscaler leader aware
• Add grace period for scaling down

Signed-off-by: Pierangelo Di Pilato pierdipi@redhat.com

[codecov]

Codecov Report

Patch coverage: 51.12% and project coverage change: -0.24% ⚠️

Comparison is base (dd68bd3) 77.89% compared to head (c85b9ad) 77.65%.
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #7027      +/-   ##
==========================================
- Coverage   77.89%   77.65%   -0.24%     
==========================================
  Files         246      246              
  Lines       13214    13301      +87     
==========================================
+ Hits        10293    10329      +36     
- Misses       2400     2450      +50     
- Partials      521      522       +1     

Files Changed	Coverage Δ
pkg/scheduler/statefulset/scheduler.go	72.43% <10.81%> (-4.84%)	⬇️
pkg/scheduler/state/state.go	82.31% <65.71%> (-2.22%)	⬇️
pkg/scheduler/statefulset/autoscaler.go	76.99% <67.21%> (-0.66%)	⬇️

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[matzew]

the naming is a bit inconsistent, but we can fix that afterwards (e.g. PendingVReplica...)

[matzew]

/lgtm
/approve

[knative-prow]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: matzew, pierDipi

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[pierDipi]

/cherry-pick release-1.11

[pierDipi]

/cherry-pick release-1.10

[knative-prow-robot]

@pierDipi: new pull request created: #7216

In response to this:

/cherry-pick release-1.11

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.

[knative-prow-robot]

@pierDipi: #7027 failed to apply on top of branch "release-1.10":

Applying: Autoscaler considers reserved and pending replicas
Applying: Format / lint fix
Applying: Simplify MAXFILLUP logic to get the expected replicas
Using index info to reconstruct a base tree...
M	pkg/scheduler/statefulset/autoscaler.go
M	pkg/scheduler/statefulset/scheduler.go
Falling back to patching base and 3-way merge...
Auto-merging pkg/scheduler/statefulset/scheduler.go
CONFLICT (content): Merge conflict in pkg/scheduler/statefulset/scheduler.go
Auto-merging pkg/scheduler/statefulset/autoscaler.go
CONFLICT (content): Merge conflict in pkg/scheduler/statefulset/autoscaler.go
error: Failed to merge in the changes.
hint: Use 'git am --show-current-patch=diff' to see the failed patch
Patch failed at 0003 Simplify MAXFILLUP logic to get the expected replicas
When you have resolved this problem, run "git am --continue".
If you prefer to skip this patch, run "git am --skip" instead.
To restore the original branch and stop patching, run "git am --abort".

In response to this:

/cherry-pick release-1.10

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.