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use a separate queue for initial quota calculation
When the quota controller gets backed up on resyncs, it can take a long time to observe the first usage stats which are needed by the admission plugin. This creates a second queue to prioritize the initial calculation.
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Fix "PVC Volume not detached if pod deleted via namespace deletion" issue
Fixes#29051: "PVC Volume not detached if pod deleted via namespace deletion"
This PR:
* Fixes a bug in `desired_state_of_the_world_populator.go` to check the value of `exists` returned by the `podInformer` so that it can delete pods even if the delete event is missed (or fails).
* Reduces the desired state of the world populators sleep period from 5 min to 1 min (reducing the amount of time a volume would remain attached if a volume delete event is missed or fails).
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Allow mounts to run in parallel for non-attachable volumes
This PR:
* Fixes https://github.com/kubernetes/kubernetes/issues/28616
* Enables mount volume operations to run in parallel for non-attachable volume plugins.
* Enables unmount volume operations to run in parallel for all volume plugins.
* Renames `GoRoutineMap` to `GoroutineMap`, resolving a long outstanding request from @thockin: `"Goroutine" is a noun`
Allow mount volume operations to run in parallel for non-attachable
volume plugins.
Allow unmount volume operations to run in parallel for all volume
plugins.
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Certificate signing controller for TLS bootstrap (alpha)
The controller handles generating and signing certificates when a CertificateSigningRequest has the "Approved" condition. Uses cfssl to support a wide set of possible keys and algorithms. Depends on PR #25562, only the last two commits are relevant to this PR.
cc @mikedanese
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Improve quota controller performance by eliminating unneeded list calls
Previously, when syncing quota usage, we asked each registered `Evaluator` to determine the usage it knows to track associated with a `GroupKind` even if that particular `GroupKind` had no associated resources under quota.
This fix makes it that when we sync a quota that just had only `Pod` related compute resources, we do not also calculate the usage stats for things like `ConfigMap`, `Secret`, etc. per quota.
This should be a significant performance gain when running large numbers of `Namespace`'s each with `ResourceQuota` that tracks a subset of resources.
/cc @deads2k @kubernetes/rh-cluster-infra
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[GarbageCollector] Let the RC manager set/remove ControllerRef
What's done:
* RC manager sets Controller Ref when creating new pods
* RC manager sets Controller Ref when adopting pods with matching labels but having no controller
* RC manager clears Controller Ref when pod labels change
* RC manager clears pods' Controller Ref when rc's selector changes
* RC manager stops adoption/creating/deleting pods when rc's DeletionTimestamp is set
* RC manager bumps up ObservedGeneration: The [original code](https://github.com/kubernetes/kubernetes/blob/master/pkg/controller/replication/replication_controller_utils.go#L36) will do this.
* Integration tests:
* verifies that changing RC's selector or Pod's Labels triggers adoption/abandoning
* e2e tests (separated to #27151):
* verifies GC deletes the pods created by RC if DeleteOptions.OrphanDependents=false, and orphans the pods if DeleteOptions.OrphanDependents=true.
TODO:
- [x] we need to be able to select Pods that have a specific ControllerRef. Then each time we sync the RC, we will iterate through all the Pods that has a controllerRef pointing the RC, event if the labels of the Pod doesn't match the selector of RC anymore. This will prevent a Pod from stuck with a stale controllerRef, which could be caused by the race between abandoner (the goroutine that removes controllerRef) and worker the goroutine that add controllerRef to pods).
- [ ] use controllerRef instead of calling `getPodController`. This might be carried out by the control-plane team.
- [ ] according to the controllerRef proposal (#25256): "For debugging purposes we want to add an adoptionTime annotation prefixed with kubernetes.io/ which will keep the time of last controller ownership transfer." This might be carried out by the control-plane team.
cc @lavalamp @gmarek
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[garbage collector] add e2e test
This PR also includes some changes to plumb controller-manager's `--enable_garbage_collector` from the environment variable.
The e2e test will not be run by the core suite because it's marked `[Feature:GarbageCollector]`.
The corresponding jenkins job configuration PR is https://github.com/kubernetes/test-infra/pull/132.
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controller: wait for synced old replica sets on Recreate
Partially fixes https://github.com/kubernetes/kubernetes/issues/27362
Any other work on it should be handled in the replica set level (and/or kubelet if it's required)
@kubernetes/deployment PTAL
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Controllers doesn't take any actions when being deleted.
I started doing it for other controllers but it's not always clear to me how it should work. I'll be adding other ones as separate commits to this PR.
cc @caesarxuchao @lavalamp
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Add hooks for cluster health detection
Separate a function that decides if zone is healthy. First real commit for preventing massive pod eviction.
Ref. #28832
cc @davidopp
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Change storeToNodeConditionLister to return []*api.Node instead of api.NodeList for performance
Currently copies that are made while copying/creating api.NodeList are significant part of scheduler profile, and a bunch of them are made in places, that are not-parallelizable.
Ref #28590
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controller/volume: simplify sync logic in syncUnboundClaim
Remove all unnecessary branching logic. No actual logic changes. Code is more readable now.
