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sidecarset_pod_event_handler.go
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sidecarset_pod_event_handler.go
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package sidecarset
import (
"context"
"reflect"
corev1 "k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/types"
"k8s.io/apimachinery/pkg/util/sets"
"k8s.io/client-go/util/workqueue"
"k8s.io/klog"
podutil "k8s.io/kubernetes/pkg/api/v1/pod"
"sigs.k8s.io/controller-runtime/pkg/client"
"sigs.k8s.io/controller-runtime/pkg/event"
"sigs.k8s.io/controller-runtime/pkg/handler"
"sigs.k8s.io/controller-runtime/pkg/reconcile"
appsv1alpha1 "github.com/openkruise/kruise/apis/apps/v1alpha1"
"github.com/openkruise/kruise/pkg/webhook/pod/mutating"
)
var _ handler.EventHandler = &enqueueRequestForPod{}
type enqueueRequestForPod struct {
client client.Client
}
func (p *enqueueRequestForPod) Create(evt event.CreateEvent, q workqueue.RateLimitingInterface) {
p.addPod(q, evt.Object)
}
func (p *enqueueRequestForPod) Delete(evt event.DeleteEvent, q workqueue.RateLimitingInterface) {
p.deletePod(q, evt.Object)
}
func (p *enqueueRequestForPod) Generic(evt event.GenericEvent, q workqueue.RateLimitingInterface) {
}
func (p *enqueueRequestForPod) Update(evt event.UpdateEvent, q workqueue.RateLimitingInterface) {
p.updatePod(q, evt.ObjectOld, evt.ObjectNew)
}
// When a pod is added, figure out what sidecarSets it will be a member of and
// enqueue them. obj must have *v1.Pod type.
func (p *enqueueRequestForPod) addPod(q workqueue.RateLimitingInterface, obj runtime.Object) {
pod, ok := obj.(*corev1.Pod)
if !ok {
return
}
sidecarSets, err := p.getPodSidecarSets(pod)
if err != nil {
klog.Errorf("unable to get sidecarSets related with pod %s/%s, err: %v", pod.Namespace, pod.Name, err)
return
}
for _, sidecarSet := range sidecarSets {
q.Add(reconcile.Request{
NamespacedName: types.NamespacedName{
Name: sidecarSet.Name,
},
})
}
}
func (p *enqueueRequestForPod) deletePod(q workqueue.RateLimitingInterface, obj runtime.Object) {
if _, ok := obj.(*corev1.Pod); ok {
p.addPod(q, obj)
return
}
}
func (p *enqueueRequestForPod) updatePod(q workqueue.RateLimitingInterface, old, cur runtime.Object) {
newPod := cur.(*corev1.Pod)
oldPod := old.(*corev1.Pod)
if newPod.ResourceVersion == oldPod.ResourceVersion {
return
}
podChanged := isPodChanged(oldPod, newPod)
labelChanged := false
if !reflect.DeepEqual(newPod.Labels, oldPod.Labels) {
labelChanged = true
}
if !podChanged && !labelChanged {
return
}
sidecarSets, err := p.getPodSidecarSetMemberships(newPod)
if err != nil {
klog.Errorf("unable to get sidecarSets of pod %s/%s, err: %v", newPod.Namespace, newPod.Name, err)
return
}
if labelChanged {
oldSidecarSets, err := p.getPodSidecarSetMemberships(oldPod)
if err != nil {
klog.Errorf("unable to get sidecarSets of pod %s/%s, err: %v", oldPod.Namespace, oldPod.Name, err)
return
}
sidecarSets = sidecarSets.Difference(oldSidecarSets).Union(oldSidecarSets.Difference(sidecarSets))
}
for name := range sidecarSets {
q.Add(reconcile.Request{
NamespacedName: types.NamespacedName{
Name: name,
},
})
}
}
func (p *enqueueRequestForPod) getPodSidecarSetMemberships(pod *corev1.Pod) (sets.String, error) {
set := sets.String{}
sidecarSets, err := p.getPodSidecarSets(pod)
if err != nil {
return set, err
}
for _, sidecarSet := range sidecarSets {
set.Insert(sidecarSet.Name)
}
return set, nil
}
func (p *enqueueRequestForPod) getPodSidecarSets(pod *corev1.Pod) ([]appsv1alpha1.SidecarSet, error) {
sidecarSets := appsv1alpha1.SidecarSetList{}
if err := p.client.List(context.TODO(), &sidecarSets); err != nil {
return nil, err
}
var matchedSidecarSets []appsv1alpha1.SidecarSet
for _, sidecarSet := range sidecarSets.Items {
matched, err := mutating.PodMatchSidecarSet(pod, sidecarSet)
if err != nil {
return nil, err
}
if matched {
matchedSidecarSets = append(matchedSidecarSets, sidecarSet)
}
}
return matchedSidecarSets, nil
}
func isPodChanged(oldPod, newPod *corev1.Pod) bool {
// If the pod's deletion timestamp is set, remove endpoint from ready address.
if newPod.DeletionTimestamp != oldPod.DeletionTimestamp {
return true
}
// If the pod's readiness has changed, the associated endpoint address
// will move from the unready endpoints set to the ready endpoints.
// So for the purposes of an endpoint, a readiness change on a pod
// means we have a changed pod.
if podutil.IsPodReady(oldPod) != podutil.IsPodReady(newPod) {
return true
}
if !isPodImageConsistent(oldPod) && isPodImageConsistent(newPod) {
return true
}
return false
}