
While currently those objects only get published by the kubelet for node-local resources, this could change once we also support network-attached resources. Dropping the "Node" prefix enables such a future extension. The NodeName in ResourceSlice and StructuredResourceHandle then becomes optional. The kubelet still needs to provide one and it must match its own node name, otherwise it doesn't have permission to access ResourceSlice objects.
223 lines
6.5 KiB
Go
223 lines
6.5 KiB
Go
/*
|
|
Copyright 2017 The Kubernetes Authors.
|
|
|
|
Licensed under the Apache License, Version 2.0 (the "License");
|
|
you may not use this file except in compliance with the License.
|
|
You may obtain a copy of the License at
|
|
|
|
http://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
Unless required by applicable law or agreed to in writing, software
|
|
distributed under the License is distributed on an "AS IS" BASIS,
|
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
See the License for the specific language governing permissions and
|
|
limitations under the License.
|
|
*/
|
|
|
|
package node
|
|
|
|
import (
|
|
"time"
|
|
|
|
"k8s.io/klog/v2"
|
|
|
|
corev1 "k8s.io/api/core/v1"
|
|
resourcev1alpha2 "k8s.io/api/resource/v1alpha2"
|
|
storagev1 "k8s.io/api/storage/v1"
|
|
"k8s.io/apimachinery/pkg/util/wait"
|
|
corev1informers "k8s.io/client-go/informers/core/v1"
|
|
resourcev1alpha2informers "k8s.io/client-go/informers/resource/v1alpha2"
|
|
storageinformers "k8s.io/client-go/informers/storage/v1"
|
|
"k8s.io/client-go/tools/cache"
|
|
)
|
|
|
|
type graphPopulator struct {
|
|
graph *Graph
|
|
}
|
|
|
|
func AddGraphEventHandlers(
|
|
graph *Graph,
|
|
nodes corev1informers.NodeInformer,
|
|
pods corev1informers.PodInformer,
|
|
pvs corev1informers.PersistentVolumeInformer,
|
|
attachments storageinformers.VolumeAttachmentInformer,
|
|
slices resourcev1alpha2informers.ResourceSliceInformer,
|
|
) {
|
|
g := &graphPopulator{
|
|
graph: graph,
|
|
}
|
|
|
|
podHandler, _ := pods.Informer().AddEventHandler(cache.ResourceEventHandlerFuncs{
|
|
AddFunc: g.addPod,
|
|
UpdateFunc: g.updatePod,
|
|
DeleteFunc: g.deletePod,
|
|
})
|
|
|
|
pvsHandler, _ := pvs.Informer().AddEventHandler(cache.ResourceEventHandlerFuncs{
|
|
AddFunc: g.addPV,
|
|
UpdateFunc: g.updatePV,
|
|
DeleteFunc: g.deletePV,
|
|
})
|
|
|
|
attachHandler, _ := attachments.Informer().AddEventHandler(cache.ResourceEventHandlerFuncs{
|
|
AddFunc: g.addVolumeAttachment,
|
|
UpdateFunc: g.updateVolumeAttachment,
|
|
DeleteFunc: g.deleteVolumeAttachment,
|
|
})
|
|
|
|
synced := []cache.InformerSynced{
|
|
podHandler.HasSynced, pvsHandler.HasSynced, attachHandler.HasSynced,
|
|
}
|
|
|
|
if slices != nil {
|
|
sliceHandler, _ := slices.Informer().AddEventHandler(cache.ResourceEventHandlerFuncs{
|
|
AddFunc: g.addResourceSlice,
|
|
UpdateFunc: nil, // Not needed, NodeName is immutable.
|
|
DeleteFunc: g.deleteResourceSlice,
|
|
})
|
|
synced = append(synced, sliceHandler.HasSynced)
|
|
}
|
|
|
|
go cache.WaitForNamedCacheSync("node_authorizer", wait.NeverStop, synced...)
|
|
}
|
|
|
|
func (g *graphPopulator) addPod(obj interface{}) {
|
|
g.updatePod(nil, obj)
|
|
}
|
|
|
|
func (g *graphPopulator) updatePod(oldObj, obj interface{}) {
|
|
pod := obj.(*corev1.Pod)
|
|
if len(pod.Spec.NodeName) == 0 {
|
|
// No node assigned
|
|
klog.V(5).Infof("updatePod %s/%s, no node", pod.Namespace, pod.Name)
|
|
return
|
|
}
|
|
if oldPod, ok := oldObj.(*corev1.Pod); ok && oldPod != nil {
|
|
if (pod.Spec.NodeName == oldPod.Spec.NodeName) && (pod.UID == oldPod.UID) &&
|
|
resourceClaimStatusesEqual(oldPod.Status.ResourceClaimStatuses, pod.Status.ResourceClaimStatuses) {
|
|
// Node and uid are unchanged, all object references in the pod spec are immutable respectively unmodified (claim statuses).
|
|
klog.V(5).Infof("updatePod %s/%s, node unchanged", pod.Namespace, pod.Name)
|
|
return
|
|
}
|
|
}
|
|
|
|
klog.V(4).Infof("updatePod %s/%s for node %s", pod.Namespace, pod.Name, pod.Spec.NodeName)
|
|
startTime := time.Now()
|
|
g.graph.AddPod(pod)
|
|
klog.V(5).Infof("updatePod %s/%s for node %s completed in %v", pod.Namespace, pod.Name, pod.Spec.NodeName, time.Since(startTime))
|
|
}
|
|
|
|
func resourceClaimStatusesEqual(statusA, statusB []corev1.PodResourceClaimStatus) bool {
|
|
if len(statusA) != len(statusB) {
|
|
return false
|
|
}
|
|
// In most cases, status entries only get added once and not modified.
|
|
// But this cannot be guaranteed, so for the sake of correctness in all
|
|
// cases this code here has to check.
|
|
for i := range statusA {
|
|
if statusA[i].Name != statusB[i].Name {
|
|
return false
|
|
}
|
|
claimNameA := statusA[i].ResourceClaimName
|
|
claimNameB := statusB[i].ResourceClaimName
|
|
if (claimNameA == nil) != (claimNameB == nil) {
|
|
return false
|
|
}
|
|
if claimNameA != nil && *claimNameA != *claimNameB {
|
|
return false
|
|
}
|
|
}
|
|
return true
|
|
}
|
|
|
|
func (g *graphPopulator) deletePod(obj interface{}) {
|
|
if tombstone, ok := obj.(cache.DeletedFinalStateUnknown); ok {
|
|
obj = tombstone.Obj
|
|
}
|
|
pod, ok := obj.(*corev1.Pod)
|
|
if !ok {
|
|
klog.Infof("unexpected type %T", obj)
|
|
return
|
|
}
|
|
if len(pod.Spec.NodeName) == 0 {
|
|
klog.V(5).Infof("deletePod %s/%s, no node", pod.Namespace, pod.Name)
|
|
return
|
|
}
|
|
|
|
klog.V(4).Infof("deletePod %s/%s for node %s", pod.Namespace, pod.Name, pod.Spec.NodeName)
|
|
startTime := time.Now()
|
|
g.graph.DeletePod(pod.Name, pod.Namespace)
|
|
klog.V(5).Infof("deletePod %s/%s for node %s completed in %v", pod.Namespace, pod.Name, pod.Spec.NodeName, time.Since(startTime))
|
|
}
|
|
|
|
func (g *graphPopulator) addPV(obj interface{}) {
|
|
g.updatePV(nil, obj)
|
|
}
|
|
|
|
func (g *graphPopulator) updatePV(oldObj, obj interface{}) {
|
|
pv := obj.(*corev1.PersistentVolume)
|
|
// TODO: skip add if uid, pvc, and secrets are all identical between old and new
|
|
g.graph.AddPV(pv)
|
|
}
|
|
|
|
func (g *graphPopulator) deletePV(obj interface{}) {
|
|
if tombstone, ok := obj.(cache.DeletedFinalStateUnknown); ok {
|
|
obj = tombstone.Obj
|
|
}
|
|
pv, ok := obj.(*corev1.PersistentVolume)
|
|
if !ok {
|
|
klog.Infof("unexpected type %T", obj)
|
|
return
|
|
}
|
|
g.graph.DeletePV(pv.Name)
|
|
}
|
|
|
|
func (g *graphPopulator) addVolumeAttachment(obj interface{}) {
|
|
g.updateVolumeAttachment(nil, obj)
|
|
}
|
|
|
|
func (g *graphPopulator) updateVolumeAttachment(oldObj, obj interface{}) {
|
|
attachment := obj.(*storagev1.VolumeAttachment)
|
|
if oldObj != nil {
|
|
// skip add if node name is identical
|
|
oldAttachment := oldObj.(*storagev1.VolumeAttachment)
|
|
if oldAttachment.Spec.NodeName == attachment.Spec.NodeName {
|
|
return
|
|
}
|
|
}
|
|
g.graph.AddVolumeAttachment(attachment.Name, attachment.Spec.NodeName)
|
|
}
|
|
|
|
func (g *graphPopulator) deleteVolumeAttachment(obj interface{}) {
|
|
if tombstone, ok := obj.(cache.DeletedFinalStateUnknown); ok {
|
|
obj = tombstone.Obj
|
|
}
|
|
attachment, ok := obj.(*storagev1.VolumeAttachment)
|
|
if !ok {
|
|
klog.Infof("unexpected type %T", obj)
|
|
return
|
|
}
|
|
g.graph.DeleteVolumeAttachment(attachment.Name)
|
|
}
|
|
|
|
func (g *graphPopulator) addResourceSlice(obj interface{}) {
|
|
slice, ok := obj.(*resourcev1alpha2.ResourceSlice)
|
|
if !ok {
|
|
klog.Infof("unexpected type %T", obj)
|
|
return
|
|
}
|
|
g.graph.AddResourceSlice(slice.Name, slice.NodeName)
|
|
}
|
|
|
|
func (g *graphPopulator) deleteResourceSlice(obj interface{}) {
|
|
if tombstone, ok := obj.(cache.DeletedFinalStateUnknown); ok {
|
|
obj = tombstone.Obj
|
|
}
|
|
slice, ok := obj.(*resourcev1alpha2.ResourceSlice)
|
|
if !ok {
|
|
klog.Infof("unexpected type %T", obj)
|
|
return
|
|
}
|
|
g.graph.DeleteResourceSlice(slice.Name)
|
|
}
|