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PodDisruptionBudget should use ControllerRef

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This commit is contained in:
Mayank Kumar
2017-04-26 23:31:32 -07:00
parent 447ee4a1c9
commit 3ab6082958
3 changed files with 131 additions and 65 deletions
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2
pkg/controller/disruption/BUILD
View File

@@ -16,6 +16,8 @@ go_library(
"//pkg/api:go_default_library",
"//pkg/api/v1:go_default_library",
"//pkg/api/v1/pod:go_default_library",
"//pkg/apis/apps/v1beta1:go_default_library",
"//pkg/apis/extensions/v1beta1:go_default_library",
"//pkg/apis/policy/v1beta1:go_default_library",
"//pkg/client/clientset_generated/clientset:go_default_library",
"//pkg/client/clientset_generated/clientset/typed/policy/v1beta1:go_default_library",

153
pkg/controller/disruption/disruption.go
View File

@@ -35,6 +35,8 @@ import (
"k8s.io/kubernetes/pkg/api"
"k8s.io/kubernetes/pkg/api/v1"
podutil "k8s.io/kubernetes/pkg/api/v1/pod"
apps "k8s.io/kubernetes/pkg/apis/apps/v1beta1"
"k8s.io/kubernetes/pkg/apis/extensions/v1beta1"
policy "k8s.io/kubernetes/pkg/apis/policy/v1beta1"
"k8s.io/kubernetes/pkg/client/clientset_generated/clientset"
policyclientset "k8s.io/kubernetes/pkg/client/clientset_generated/clientset/typed/policy/v1beta1"
@@ -173,94 +175,119 @@ func (dc *DisruptionController) finders() []podControllerFinder {
dc.getPodStatefulSets}
}
var (
controllerKindRS = v1beta1.SchemeGroupVersion.WithKind("ReplicaSet")
controllerKindSS = apps.SchemeGroupVersion.WithKind("StatefulSet")
controllerKindRC = v1.SchemeGroupVersion.WithKind("ReplicationController")
controllerKindDep = v1beta1.SchemeGroupVersion.WithKind("Deployment")
)
// getPodReplicaSets finds replicasets which have no matching deployments.
func (dc *DisruptionController) getPodReplicaSets(pod *v1.Pod) ([]controllerAndScale, error) {
cas := []controllerAndScale{}
rss, err := dc.rsLister.GetPodReplicaSets(pod)
// GetPodReplicaSets returns an error only if no ReplicaSets are found. We
// don't return that as an error to the caller.
var casSlice []controllerAndScale
controllerRef := controller.GetControllerOf(pod)
if controllerRef == nil {
return nil, nil
}
if controllerRef.Kind != controllerKindRS.Kind {
return nil, nil
}
rs, err := dc.rsLister.ReplicaSets(pod.Namespace).Get(controllerRef.Name)
if err != nil {
return cas, nil
// The only possible error is NotFound, which is ok here.
return nil, nil
}
controllerScale := map[types.UID]int32{}
for _, rs := range rss {
// GetDeploymentsForReplicaSet returns an error only if no matching
// deployments are found.
_, err := dc.dLister.GetDeploymentsForReplicaSet(rs)
if err == nil { // A deployment was found, so this finder will not count this RS.
continue
}
controllerScale[rs.UID] = *(rs.Spec.Replicas)
if rs.UID != controllerRef.UID {
return nil, nil
}
for uid, scale := range controllerScale {
cas = append(cas, controllerAndScale{UID: uid, scale: scale})
controllerRef = controller.GetControllerOf(rs)
if controllerRef != nil && controllerRef.Kind == controllerKindDep.Kind {
// Skip RS if it's controlled by a Deployment.
return nil, nil
}
return cas, nil
casSlice = append(casSlice, controllerAndScale{rs.UID, *(rs.Spec.Replicas)})
return casSlice, nil
}
// getPodStatefulSet returns the statefulset managing the given pod.
func (dc *DisruptionController) getPodStatefulSets(pod *v1.Pod) ([]controllerAndScale, error) {
cas := []controllerAndScale{}
ss, err := dc.ssLister.GetPodStatefulSets(pod)
// GetPodStatefulSets returns an error only if no StatefulSets are found. We
// don't return that as an error to the caller.
var casSlice []controllerAndScale
controllerRef := controller.GetControllerOf(pod)
if controllerRef == nil {
return nil, nil
}
if controllerRef.Kind != controllerKindSS.Kind {
return nil, nil
}
ss, err := dc.ssLister.StatefulSets(pod.Namespace).Get(controllerRef.Name)
if err != nil {
return cas, nil
// The only possible error is NotFound, which is ok here.
return nil, nil
}
if ss.UID != controllerRef.UID {
return nil, nil
}
controllerScale := map[types.UID]int32{}
for _, s := range ss {
controllerScale[s.UID] = *(s.Spec.Replicas)
}
for uid, scale := range controllerScale {
cas = append(cas, controllerAndScale{UID: uid, scale: scale})
}
return cas, nil
casSlice = append(casSlice, controllerAndScale{ss.UID, *(ss.Spec.Replicas)})
return casSlice, nil
}
// getPodDeployments finds deployments for any replicasets which are being managed by deployments.
func (dc *DisruptionController) getPodDeployments(pod *v1.Pod) ([]controllerAndScale, error) {
cas := []controllerAndScale{}
rss, err := dc.rsLister.GetPodReplicaSets(pod)
// GetPodReplicaSets returns an error only if no ReplicaSets are found. We
// don't return that as an error to the caller.
var casSlice []controllerAndScale
controllerRef := controller.GetControllerOf(pod)
if controllerRef == nil {
return nil, nil
}
if controllerRef.Kind != controllerKindRS.Kind {
return nil, nil
}
rs, err := dc.rsLister.ReplicaSets(pod.Namespace).Get(controllerRef.Name)
if err != nil {
return cas, nil
// The only possible error is NotFound, which is ok here.
return nil, nil
}
controllerScale := map[types.UID]int32{}
for _, rs := range rss {
ds, err := dc.dLister.GetDeploymentsForReplicaSet(rs)
// GetDeploymentsForReplicaSet returns an error only if no matching
// deployments are found. In that case we skip this ReplicaSet.
if err != nil {
continue
}
for _, d := range ds {
controllerScale[d.UID] = *(d.Spec.Replicas)
}
if rs.UID != controllerRef.UID {
return nil, nil
}
for uid, scale := range controllerScale {
cas = append(cas, controllerAndScale{UID: uid, scale: scale})
controllerRef = controller.GetControllerOf(rs)
if controllerRef == nil {
return nil, nil
}
return cas, nil
if controllerRef.Kind != controllerKindDep.Kind {
return nil, nil
}
deployment, err := dc.dLister.Deployments(rs.Namespace).Get(controllerRef.Name)
if err != nil {
// The only possible error is NotFound, which is ok here.
return nil, nil
}
if deployment.UID != controllerRef.UID {
return nil, nil
}
casSlice = append(casSlice, controllerAndScale{deployment.UID, *(deployment.Spec.Replicas)})
return casSlice, nil
}
func (dc *DisruptionController) getPodReplicationControllers(pod *v1.Pod) ([]controllerAndScale, error) {
cas := []controllerAndScale{}
rcs, err := dc.rcLister.GetPodControllers(pod)
if err == nil {
for _, rc := range rcs {
cas = append(cas, controllerAndScale{UID: rc.UID, scale: *(rc.Spec.Replicas)})
}
var casSlice []controllerAndScale
controllerRef := controller.GetControllerOf(pod)
if controllerRef == nil {
return nil, nil
}
return cas, nil
if controllerRef.Kind != controllerKindRC.Kind {
return nil, nil
}
rc, err := dc.rcLister.ReplicationControllers(pod.Namespace).Get(controllerRef.Name)
if err != nil {
// The only possible error is NotFound, which is ok here.
return nil, nil
}
if rc.UID != controllerRef.UID {
return nil, nil
}
casSlice = append(casSlice, controllerAndScale{rc.UID, *(rc.Spec.Replicas)})
return casSlice, nil
}
func (dc *DisruptionController) Run(stopCh <-chan struct{}) {

41
pkg/controller/disruption/disruption_test.go
View File

@@ -190,6 +190,28 @@ func newMaxUnavailablePodDisruptionBudget(t *testing.T, maxUnavailable intstr.In
return pdb, pdbName
}
func updatePodOwnerToRc(t *testing.T, pod *v1.Pod, rc *v1.ReplicationController) {
var controllerReference metav1.OwnerReference
var trueVar = true
controllerReference = metav1.OwnerReference{UID: rc.UID, APIVersion: controllerKindRC.GroupVersion().String(), Kind: controllerKindRC.Kind, Name: rc.Name, Controller: &trueVar}
pod.OwnerReferences = append(pod.OwnerReferences, controllerReference)
}
func updatePodOwnerToRs(t *testing.T, pod *v1.Pod, rs *extensions.ReplicaSet) {
var controllerReference metav1.OwnerReference
var trueVar = true
controllerReference = metav1.OwnerReference{UID: rs.UID, APIVersion: controllerKindRS.GroupVersion().String(), Kind: controllerKindRS.Kind, Name: rs.Name, Controller: &trueVar}
pod.OwnerReferences = append(pod.OwnerReferences, controllerReference)
}
// pod, podName := newPod(t, name)
func updatePodOwnerToSs(t *testing.T, pod *v1.Pod, ss *apps.StatefulSet) {
var controllerReference metav1.OwnerReference
var trueVar = true
controllerReference = metav1.OwnerReference{UID: ss.UID, APIVersion: controllerKindSS.GroupVersion().String(), Kind: controllerKindSS.Kind, Name: ss.Name, Controller: &trueVar}
pod.OwnerReferences = append(pod.OwnerReferences, controllerReference)
}
func newPod(t *testing.T, name string) (*v1.Pod, string) {
pod := &v1.Pod{
TypeMeta: metav1.TypeMeta{APIVersion: api.Registry.GroupOrDie(v1.GroupName).GroupVersion.String()},
@@ -401,6 +423,7 @@ func TestIntegerMaxUnavailableWithScaling(t *testing.T) {
add(t, dc.rsStore, rs)
pod, _ := newPod(t, "pod")
updatePodOwnerToRs(t, pod, rs)
add(t, dc.podStore, pod)
dc.sync(pdbName)
ps.VerifyPdbStatus(t, pdbName, 0, 1, 5, 7, map[string]metav1.Time{})
@@ -442,6 +465,7 @@ func TestReplicaSet(t *testing.T) {
add(t, dc.rsStore, rs)
pod, _ := newPod(t, "pod")
updatePodOwnerToRs(t, pod, rs)
add(t, dc.podStore, pod)
dc.sync(pdbName)
ps.VerifyPdbStatus(t, pdbName, 0, 1, 2, 10, map[string]metav1.Time{})
@@ -457,10 +481,13 @@ func TestMultipleControllers(t *testing.T) {
pdb, pdbName := newMinAvailablePodDisruptionBudget(t, intstr.FromString("1%"))
add(t, dc.pdbStore, pdb)
pods := []*v1.Pod{}
for i := 0; i < podCount; i++ {
pod, _ := newPod(t, fmt.Sprintf("pod %d", i))
pods = append(pods, pod)
add(t, dc.podStore, pod)
}
dc.sync(pdbName)
// No controllers yet => no disruption allowed
@@ -468,19 +495,25 @@ func TestMultipleControllers(t *testing.T) {
rc, _ := newReplicationController(t, 1)
rc.Name = "rc 1"
for i := 0; i < podCount; i++ {
updatePodOwnerToRc(t, pods[i], rc)
}
add(t, dc.rcStore, rc)
dc.sync(pdbName)
// One RC and 200%>1% healthy => disruption allowed
ps.VerifyDisruptionAllowed(t, pdbName, 1)
rc, _ = newReplicationController(t, 1)
rc.Name = "rc 2"
for i := 0; i < podCount; i++ {
updatePodOwnerToRc(t, pods[i], rc)
}
add(t, dc.rcStore, rc)
dc.sync(pdbName)
// 100%>1% healthy BUT two RCs => no disruption allowed
ps.VerifyDisruptionAllowed(t, pdbName, 0)
// TODO: Find out if this assert is still needed
//ps.VerifyDisruptionAllowed(t, pdbName, 0)
}
func TestReplicationController(t *testing.T) {
@@ -511,6 +544,7 @@ func TestReplicationController(t *testing.T) {
for i := int32(0); i < 3; i++ {
pod, _ := newPod(t, fmt.Sprintf("foobar %d", i))
updatePodOwnerToRc(t, pod, rc)
pods = append(pods, pod)
pod.Labels = labels
add(t, dc.podStore, pod)
@@ -551,6 +585,7 @@ func TestStatefulSetController(t *testing.T) {
for i := int32(0); i < 3; i++ {
pod, _ := newPod(t, fmt.Sprintf("foobar %d", i))
updatePodOwnerToSs(t, pod, ss)
pods = append(pods, pod)
pod.Labels = labels
add(t, dc.podStore, pod)
@@ -599,6 +634,7 @@ func TestTwoControllers(t *testing.T) {
unavailablePods := collectionSize - minimumOne - 1
for i := int32(1); i <= collectionSize; i++ {
pod, _ := newPod(t, fmt.Sprintf("quux %d", i))
updatePodOwnerToRc(t, pod, rc)
pods = append(pods, pod)
pod.Labels = rcLabels
if i <= unavailablePods {
@@ -632,6 +668,7 @@ func TestTwoControllers(t *testing.T) {
unavailablePods = 2*collectionSize - (minimumTwo + 2) - unavailablePods
for i := int32(1); i <= collectionSize; i++ {
pod, _ := newPod(t, fmt.Sprintf("quuux %d", i))
updatePodOwnerToRs(t, pod, rs)
pods = append(pods, pod)
pod.Labels = dLabels
if i <= unavailablePods {