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Merge pull request #97407 from waynepeking348/clean_rs_by_revision_instead_of_creat_timestamp

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clean rs by revision instead of creation timestamp in deployment controller
This commit is contained in:
Kubernetes Prow Robot 2021-01-21 20:15:27 -08:00 committed by GitHub
commit 73fbd3da09
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4 changed files with 160 additions and 1 deletions
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1
pkg/controller/deployment/BUILD
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@ -78,6 +78,7 @@ go_test(
"//staging/src/k8s.io/apimachinery/pkg/runtime/schema:go_default_library",
"//staging/src/k8s.io/apimachinery/pkg/types:go_default_library",
"//staging/src/k8s.io/apimachinery/pkg/util/intstr:go_default_library",
"//staging/src/k8s.io/apimachinery/pkg/util/sets:go_default_library",
"//staging/src/k8s.io/apimachinery/pkg/util/uuid:go_default_library",
"//staging/src/k8s.io/client-go/informers:go_default_library",
"//staging/src/k8s.io/client-go/kubernetes/fake:go_default_library",

2
pkg/controller/deployment/sync.go
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@ -448,7 +448,7 @@ func (dc *DeploymentController) cleanupDeployment(oldRSs []*apps.ReplicaSet, dep
return nil
}
sort.Sort(controller.ReplicaSetsByCreationTimestamp(cleanableRSes))
sort.Sort(deploymentutil.ReplicaSetsByRevision(cleanableRSes))
klog.V(4).Infof("Looking to cleanup old replica sets for deployment %q", deployment.Name)
for i := int32(0); i < diff; i++ {

143
pkg/controller/deployment/sync_test.go
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@ -24,6 +24,7 @@ import (
apps "k8s.io/api/apps/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/util/intstr"
"k8s.io/apimachinery/pkg/util/sets"
"k8s.io/client-go/informers"
"k8s.io/client-go/kubernetes/fake"
testclient "k8s.io/client-go/testing"
@ -446,3 +447,145 @@ func TestDeploymentController_cleanupDeployment(t *testing.T) {
}
}
}
func TestDeploymentController_cleanupDeploymentOrder(t *testing.T) {
selector := map[string]string{"foo": "bar"}
now := metav1.Now()
duration := time.Minute
newRSWithRevisionAndCreationTimestamp := func(name string, replicas int, selector map[string]string, timestamp time.Time, revision string) *apps.ReplicaSet {
rs := rs(name, replicas, selector, metav1.NewTime(timestamp))
if revision != "" {
rs.Annotations = map[string]string{
deploymentutil.RevisionAnnotation: revision,
}
}
rs.Status = apps.ReplicaSetStatus{
Replicas: int32(replicas),
}
return rs
}
// for all test cases, creationTimestamp order keeps as: rs1 < rs2 < rs3 < r4
tests := []struct {
oldRSs []*apps.ReplicaSet
revisionHistoryLimit int32
expectedDeletedRSs sets.String
}{
{
// revision order: rs1 < rs2, delete rs1
oldRSs: []*apps.ReplicaSet{
newRSWithRevisionAndCreationTimestamp("foo-1", 0, selector, now.Add(-1*duration), "1"),
newRSWithRevisionAndCreationTimestamp("foo-2", 0, selector, now.Time, "2"),
},
revisionHistoryLimit: 1,
expectedDeletedRSs: sets.NewString("foo-1"),
},
{
// revision order: rs2 < rs1, delete rs2
oldRSs: []*apps.ReplicaSet{
newRSWithRevisionAndCreationTimestamp("foo-1", 0, selector, now.Add(-1*duration), "2"),
newRSWithRevisionAndCreationTimestamp("foo-2", 0, selector, now.Time, "1"),
},
revisionHistoryLimit: 1,
expectedDeletedRSs: sets.NewString("foo-2"),
},
{
// rs1 has revision but rs2 doesn't have revision, delete rs2
oldRSs: []*apps.ReplicaSet{
newRSWithRevisionAndCreationTimestamp("foo-1", 0, selector, now.Add(-1*duration), "1"),
newRSWithRevisionAndCreationTimestamp("foo-2", 0, selector, now.Time, ""),
},
revisionHistoryLimit: 1,
expectedDeletedRSs: sets.NewString("foo-2"),
},
{
// rs1 doesn't have revision while rs2 has revision, delete rs1
oldRSs: []*apps.ReplicaSet{
newRSWithRevisionAndCreationTimestamp("foo-1", 0, selector, now.Add(-1*duration), ""),
newRSWithRevisionAndCreationTimestamp("foo-2", 0, selector, now.Time, "2"),
},
revisionHistoryLimit: 1,
expectedDeletedRSs: sets.NewString("foo-1"),
},
{
// revision order: rs1 < rs2 < r3, but rs1 has replicas, delete rs2
oldRSs: []*apps.ReplicaSet{
newRSWithRevisionAndCreationTimestamp("foo-1", 1, selector, now.Add(-1*duration), "1"),
newRSWithRevisionAndCreationTimestamp("foo-2", 0, selector, now.Time, "2"),
newRSWithRevisionAndCreationTimestamp("foo-3", 0, selector, now.Add(duration), "3"),
},
revisionHistoryLimit: 1,
expectedDeletedRSs: sets.NewString("foo-2"),
},
{
// revision order: rs1 < rs2 < r3, both rs1 && rs2 have replicas, don't delete
oldRSs: []*apps.ReplicaSet{
newRSWithRevisionAndCreationTimestamp("foo-1", 1, selector, now.Add(-1*duration), "1"),
newRSWithRevisionAndCreationTimestamp("foo-2", 1, selector, now.Time, "2"),
newRSWithRevisionAndCreationTimestamp("foo-3", 0, selector, now.Add(duration), "3"),
},
revisionHistoryLimit: 1,
expectedDeletedRSs: sets.NewString(),
},
{
// revision order: rs2 < rs4 < rs1 < rs3, delete rs2 && rs4
oldRSs: []*apps.ReplicaSet{
newRSWithRevisionAndCreationTimestamp("foo-1", 0, selector, now.Add(-1*duration), "3"),
newRSWithRevisionAndCreationTimestamp("foo-2", 0, selector, now.Time, "1"),
newRSWithRevisionAndCreationTimestamp("foo-3", 0, selector, now.Add(duration), "4"),
newRSWithRevisionAndCreationTimestamp("foo-4", 0, selector, now.Add(2*duration), "2"),
},
revisionHistoryLimit: 2,
expectedDeletedRSs: sets.NewString("foo-2", "foo-4"),
},
}
for i := range tests {
test := tests[i]
t.Logf("scenario %d", i)
fake := &fake.Clientset{}
informers := informers.NewSharedInformerFactory(fake, controller.NoResyncPeriodFunc())
controller, err := NewDeploymentController(informers.Apps().V1().Deployments(), informers.Apps().V1().ReplicaSets(), informers.Core().V1().Pods(), fake)
if err != nil {
t.Fatalf("error creating Deployment controller: %v", err)
}
controller.eventRecorder = &record.FakeRecorder{}
controller.dListerSynced = alwaysReady
controller.rsListerSynced = alwaysReady
controller.podListerSynced = alwaysReady
for _, rs := range test.oldRSs {
informers.Apps().V1().ReplicaSets().Informer().GetIndexer().Add(rs)
}
stopCh := make(chan struct{})
defer close(stopCh)
informers.Start(stopCh)
d := newDeployment("foo", 1, &test.revisionHistoryLimit, nil, nil, map[string]string{"foo": "bar"})
controller.cleanupDeployment(test.oldRSs, d)
deletedRSs := sets.String{}
for _, action := range fake.Actions() {
deleteAction, ok := action.(testclient.DeleteActionImpl)
if !ok {
t.Logf("Found not-delete action with verb %v. Ignoring.", action.GetVerb())
continue
}
if deleteAction.GetResource().Resource != "replicasets" {
continue
}
deletedRSs.Insert(deleteAction.GetName())
}
t.Logf("&test.revisionHistoryLimit: %d, &test.deletedReplicaSets: %v", test.revisionHistoryLimit, deletedRSs)
if !test.expectedDeletedRSs.Equal(deletedRSs) {
t.Errorf("expect to delete old replica sets %v, but got %v", test.expectedDeletedRSs, deletedRSs)
continue
}
}
}

15
pkg/controller/deployment/util/deployment_util.go
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@ -949,3 +949,18 @@ func GetDeploymentsForReplicaSet(deploymentLister appslisters.DeploymentLister,
return deployments, nil
}
// ReplicaSetsByRevision sorts a list of ReplicaSet by revision, using their creation timestamp or name as a tie breaker.
// By using the creation timestamp, this sorts from old to new replica sets.
type ReplicaSetsByRevision []*apps.ReplicaSet
func (o ReplicaSetsByRevision) Len() int { return len(o) }
func (o ReplicaSetsByRevision) Swap(i, j int) { o[i], o[j] = o[j], o[i] }
func (o ReplicaSetsByRevision) Less(i, j int) bool {
revision1, err1 := Revision(o[i])
revision2, err2 := Revision(o[j])
if err1 != nil || err2 != nil || revision1 == revision2 {
return controller.ReplicaSetsByCreationTimestamp(o).Less(i, j)
}
return revision1 < revision2
}