Merge pull request #59365 from ayushpateria/patch-sts

Automatic merge from submit-queue. If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>. Fix StatefulSet set-based selector bug **What this PR does / why we need it**: ControllerRevisions were using selectors as the labels, in case of set-based selectors, the helper function to convert selectors to labels would break. This PR uses pod labels for ControllerRevision labels instead of selectors. **Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*: Fixes #59266 **Special notes for your reviewer**: I'm trying to learn Kubernetes codebase and would be happy to make changes if anything is off. **Release note**: ```release-note Fix StatefulSet to work with set-based selectors. ```

Merge pull request #59365 from ayushpateria/patch-sts
249ecab7 · Kubernetes Submit Queue · GitHub · 6546b699 · a269491f · 249ecab7
Unverified Commit 249ecab7 authored Feb 27, 2018 by Kubernetes Submit Queue Committed by GitHub Feb 27, 2018
3 changed files
--- a/pkg/controller/history/controller_history.go
+++ b/pkg/controller/history/controller_history.go
@@ -56,19 +56,19 @@ func ControllerRevisionName(prefix string, hash uint32) string {
 }

 // NewControllerRevision returns a ControllerRevision with a ControllerRef pointing to parent and indicating that
-// parent is of parentKind. The ControllerRevision has labels matching selector, contains Data equal to data, and
+// parent is of parentKind. The ControllerRevision has labels matching template labels, contains Data equal to data, and
 // has a Revision equal to revision. The collisionCount is used when creating the name of the ControllerRevision
 // so the name is likely unique. If the returned error is nil, the returned ControllerRevision is valid. If the
 // returned error is not nil, the returned ControllerRevision is invalid for use.
 func NewControllerRevision(parent metav1.Object,
 	parentKind schema.GroupVersionKind,
-	selector labels.Selector,
+	templateLabels map[string]string,
 	data runtime.RawExtension,
 	revision int64,
 	collisionCount *int32) (*apps.ControllerRevision, error) {
-	labelMap, err := labels.ConvertSelectorToLabelsMap(selector.String())
-	if err != nil {
-		return nil, err
+	labelMap := make(map[string]string)
+	for k, v := range templateLabels {
+		labelMap[k] = v
 	}
 	blockOwnerDeletion := true
 	isController := true

--- a/pkg/controller/history/controller_history_test.go
+++ b/pkg/controller/history/controller_history_test.go
--- a/pkg/controller/statefulset/stateful_set_utils.go
+++ b/pkg/controller/statefulset/stateful_set_utils.go
@@ -312,13 +312,9 @@ func newRevision(set *apps.StatefulSet, revision int64, collisionCount *int32) (
 	if err != nil {
 		return nil, err
 	}
-	selector, err := metav1.LabelSelectorAsSelector(set.Spec.Selector)
-	if err != nil {
-		return nil, err
-	}
 	cr, err := history.NewControllerRevision(set,
 		controllerKind,
-		selector,
+		set.Spec.Template.Labels,
 		runtime.RawExtension{Raw: patch},
 		revision,
 		collisionCount)