/
enqueue_requests_for_pod_events.go
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/
enqueue_requests_for_pod_events.go
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package cloudmap
import (
"context"
appmesh "github.com/aws/aws-app-mesh-controller-for-k8s/apis/appmesh/v1beta2"
"github.com/aws/aws-app-mesh-controller-for-k8s/pkg/k8s"
"github.com/go-logr/logr"
corev1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/labels"
"k8s.io/client-go/util/workqueue"
ctrl "sigs.k8s.io/controller-runtime"
"sigs.k8s.io/controller-runtime/pkg/client"
"sigs.k8s.io/controller-runtime/pkg/event"
"sigs.k8s.io/controller-runtime/pkg/handler"
)
func NewEnqueueRequestsForPodEvents(k8sClient client.Client, log logr.Logger) *enqueueRequestsForPodEvents {
return &enqueueRequestsForPodEvents{
k8sClient: k8sClient,
log: log,
}
}
var _ handler.EventHandler = (*enqueueRequestsForPodEvents)(nil)
type enqueueRequestsForPodEvents struct {
k8sClient client.Client
log logr.Logger
}
// Create is called in response to an create event
func (h *enqueueRequestsForPodEvents) Create(e event.CreateEvent, queue workqueue.RateLimitingInterface) {
h.enqueueVirtualNodesForPods(context.Background(), queue, e.Object.(*corev1.Pod))
}
// Update is called in response to an update event
func (h *enqueueRequestsForPodEvents) Update(e event.UpdateEvent, queue workqueue.RateLimitingInterface) {
// cloudmap reconcile depends Virtualnode Pod Selector labels and if there is an update to a Pod
// we need to check if there is any change w.r.t VirtualNode it belongs.
oldPod := e.ObjectOld.(*corev1.Pod)
newPod := e.ObjectNew.(*corev1.Pod)
oldPodIsReady := ArePodContainersReady(oldPod)
newPodIsReady := ArePodContainersReady(newPod)
if oldPodIsReady != newPodIsReady || newPod.DeletionTimestamp != nil {
h.enqueueVirtualNodesForPods(context.Background(), queue, e.ObjectNew.(*corev1.Pod))
}
}
// Delete is called in response to a delete event
func (h *enqueueRequestsForPodEvents) Delete(e event.DeleteEvent, queue workqueue.RateLimitingInterface) {
h.enqueueVirtualNodesForPods(context.Background(), queue, e.Object.(*corev1.Pod))
}
// Generic is called in response to an event of an unknown type or a synthetic event triggered as a cron or
// external trigger request
func (h *enqueueRequestsForPodEvents) Generic(e event.GenericEvent, queue workqueue.RateLimitingInterface) {
// no-op
}
func (h *enqueueRequestsForPodEvents) enqueueVirtualNodesForPods(ctx context.Context, queue workqueue.RateLimitingInterface,
pod *corev1.Pod) {
var listOptions client.ListOptions
listOptions.Namespace = pod.Namespace
vnList := &appmesh.VirtualNodeList{}
if err := h.k8sClient.List(ctx, vnList, &listOptions); err != nil {
h.log.Error(err, "failed to enqueue virtualNodes for pod events",
"Pod", k8s.NamespacedName(pod))
return
}
for _, vn := range vnList.Items {
if vn.Spec.ServiceDiscovery == nil || vn.Spec.ServiceDiscovery.AWSCloudMap == nil {
continue
}
selector, err := metav1.LabelSelectorAsSelector(vn.Spec.PodSelector)
if err != nil {
continue
}
if selector.Matches(labels.Set(pod.Labels)) {
queue.Add(ctrl.Request{NamespacedName: k8s.NamespacedName(&vn)})
}
}
}