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Merge pull request #79372 from RainbowMango/pr_fix_issue_78954_svn_controller_clean

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Fix service load balancer may not be cleaned up on corner case of type change
This commit is contained in:
Kubernetes Prow Robot 2019-06-26 21:13:19 -07:00 committed by GitHub
commit fd66d37b3a
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2 changed files with 44 additions and 15 deletions
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17
pkg/controller/service/service_controller.go
View File

@ -136,6 +136,8 @@ func New(
cache.ResourceEventHandlerFuncs{
AddFunc: func(cur interface{}) {
svc, ok := cur.(*v1.Service)
// Check cleanup here can provide a remedy when controller failed to handle
// changes before it exiting (e.g. crashing, restart, etc.).
if ok && (wantsLoadBalancer(svc) || needsCleanup(svc)) {
s.enqueueService(cur)
}
@ -438,7 +440,20 @@ func (s *serviceCache) delete(serviceName string) {
// needsCleanup checks if load balancer needs to be cleaned up as indicated by finalizer.
func needsCleanup(service *v1.Service) bool {
return service.ObjectMeta.DeletionTimestamp != nil && servicehelper.HasLBFinalizer(service)
if !servicehelper.HasLBFinalizer(service) {
return false
}
if service.ObjectMeta.DeletionTimestamp != nil {
return true
}
// Service doesn't want loadBalancer but owns loadBalancer finalizer also need to be cleaned up.
if service.Spec.Type != v1.ServiceTypeLoadBalancer {
return true
}
return false
}
// needsUpdate checks if load balancer needs to be updated due to change in attributes.

42
pkg/controller/service/service_controller_test.go
View File

@ -833,6 +833,16 @@ func TestProcessServiceDeletion(t *testing.T) {
}
// Test cases:
// index finalizer timestamp wantLB | clean-up
// 0 0 0 0 | false (No finalizer, no clean up)
// 1 0 0 1 | false (Ignored as same with case 0)
// 2 0 1 0 | false (Ignored as same with case 0)
// 3 0 1 1 | false (Ignored as same with case 0)
// 4 1 0 0 | true
// 5 1 0 1 | false
// 6 1 1 0 | true (Service is deleted, needs clean up)
// 7 1 1 1 | true (Ignored as same with case 6)
func TestNeedsCleanup(t *testing.T) {
testCases := []struct {
desc string
@ -840,27 +850,31 @@ func TestNeedsCleanup(t *testing.T) {
expectNeedsCleanup bool
}{
{
desc: "service without finalizer without timestamp",
desc: "service without finalizer",
svc: &v1.Service{},
expectNeedsCleanup: false,
},
{
desc: "service without finalizer with timestamp",
svc: &v1.Service{
ObjectMeta: metav1.ObjectMeta{
DeletionTimestamp: &metav1.Time{
Time: time.Now(),
},
},
},
expectNeedsCleanup: false,
},
{
desc: "service with finalizer without timestamp",
desc: "service with finalizer without timestamp without LB",
svc: &v1.Service{
ObjectMeta: metav1.ObjectMeta{
Finalizers: []string{servicehelper.LoadBalancerCleanupFinalizer},
},
Spec: v1.ServiceSpec{
Type: v1.ServiceTypeNodePort,
},
},
expectNeedsCleanup: true,
},
{
desc: "service with finalizer without timestamp with LB",
svc: &v1.Service{
ObjectMeta: metav1.ObjectMeta{
Finalizers: []string{servicehelper.LoadBalancerCleanupFinalizer},
},
Spec: v1.ServiceSpec{
Type: v1.ServiceTypeLoadBalancer,
},
},
expectNeedsCleanup: false,
},
@ -868,10 +882,10 @@ func TestNeedsCleanup(t *testing.T) {
desc: "service with finalizer with timestamp",
svc: &v1.Service{
ObjectMeta: metav1.ObjectMeta{
Finalizers: []string{servicehelper.LoadBalancerCleanupFinalizer},
DeletionTimestamp: &metav1.Time{
Time: time.Now(),
},
Finalizers: []string{servicehelper.LoadBalancerCleanupFinalizer, "unrelated"},
},
},
expectNeedsCleanup: true,