/
eventhandler.go
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/
eventhandler.go
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package scheduler
import (
"context"
"fmt"
"time"
rocketv1alpha1 "github.com/hex-techs/rocket/api/v1alpha1"
schedcache "github.com/hex-techs/rocket/pkg/scheduler/cache"
"github.com/hex-techs/rocket/pkg/utils/tools"
v1 "k8s.io/api/core/v1"
utilruntime "k8s.io/apimachinery/pkg/util/runtime"
corev1informers "k8s.io/client-go/informers/core/v1"
"k8s.io/client-go/kubernetes"
corev1listers "k8s.io/client-go/listers/core/v1"
"k8s.io/client-go/tools/cache"
"sigs.k8s.io/controller-runtime/pkg/log"
)
const (
// Duration the scheduler will wait before expiring an assumed pod.
durationToExpireAssumedPod = 15 * time.Minute
)
// the cache of the cluster
type clusterCache struct {
// It is expected that changes made via Cache will be observed
// by NodeLister and Algorithm.
schedCache schedcache.Cache
// region of the cluster
region string
// cloudarea pub or ded
area string
name string
// cluster taint
Taint []v1.Taint
client kubernetes.Interface
nodesLister corev1listers.NodeLister
nodeSynced cache.InformerSynced
podLister corev1listers.PodLister
podSynced cache.InformerSynced
}
func (cc *clusterCache) addPodToCache(obj interface{}) {
log := log.FromContext(context.Background())
pod, ok := obj.(*v1.Pod)
if !ok {
log.Error(nil, "Cannot convert to *v1.Pod", "obj", obj)
return
}
log.V(4).Info("Add event for scheduled pod", "pod", tools.KObj(pod))
if err := cc.schedCache.AddPod(pod); err != nil {
log.Error(err, "Scheduler cache AddPod failed", "pod", tools.KObj(pod))
}
}
func (sched *clusterCache) updatePodInCache(oldObj, newObj interface{}) {
log := log.FromContext(context.Background())
oldPod, ok := oldObj.(*v1.Pod)
if !ok {
log.Error(nil, "Cannot convert oldObj to *v1.Pod", "oldObj", oldObj)
return
}
newPod, ok := newObj.(*v1.Pod)
if !ok {
log.Error(nil, "Cannot convert newObj to *v1.Pod", "newObj", newObj)
return
}
log.V(4).Info("Update event for scheduled pod", "pod", tools.KObj(oldPod))
if err := sched.schedCache.UpdatePod(oldPod, newPod); err != nil {
log.Error(err, "Scheduler cache UpdatePod failed", "pod", tools.KObj(oldPod))
}
}
func (sched *clusterCache) deletePodFromCache(obj interface{}) {
log := log.FromContext(context.Background())
var pod *v1.Pod
switch t := obj.(type) {
case *v1.Pod:
pod = t
case cache.DeletedFinalStateUnknown:
var ok bool
pod, ok = t.Obj.(*v1.Pod)
if !ok {
log.Error(nil, "Cannot convert to *v1.Pod", "obj", t.Obj)
return
}
default:
log.Error(nil, "Cannot convert to *v1.Pod", "obj", t)
return
}
log.V(4).Info("Delete event for scheduled pod", "pod", tools.KObj(pod))
if err := sched.schedCache.RemovePod(pod); err != nil {
log.Error(err, "Scheduler cache RemovePod failed", "pod", tools.KObj(pod))
}
}
func (sched *clusterCache) addNodeToCache(obj interface{}) {
log := log.FromContext(context.Background())
node, ok := obj.(*v1.Node)
if !ok {
log.Error(nil, "Cannot convert to *v1.Node", "obj", obj)
return
}
sched.schedCache.AddNode(node)
log.V(4).Info("Add event for node", "node", tools.KObj(node))
}
func (sched *clusterCache) updateNodeInCache(oldObj, newObj interface{}) {
log := log.FromContext(context.Background())
oldNode, ok := oldObj.(*v1.Node)
if !ok {
log.Error(nil, "Cannot convert oldObj to *v1.Node", "oldObj", oldObj)
return
}
newNode, ok := newObj.(*v1.Node)
if !ok {
log.Error(nil, "Cannot convert newObj to *v1.Node", "newObj", newObj)
return
}
sched.schedCache.UpdateNode(oldNode, newNode)
}
func (sched *clusterCache) deleteNodeFromCache(obj interface{}) {
log := log.FromContext(context.Background())
var node *v1.Node
switch t := obj.(type) {
case *v1.Node:
node = t
case cache.DeletedFinalStateUnknown:
var ok bool
node, ok = t.Obj.(*v1.Node)
if !ok {
log.Error(nil, "Cannot convert to *v1.Node", "obj", t.Obj)
return
}
default:
log.Error(nil, "Cannot convert to *v1.Node", "obj", t)
return
}
log.V(4).Info("Delete event for node", "node", tools.KObj(node))
if err := sched.schedCache.RemoveNode(node); err != nil {
log.Error(err, "Scheduler cache RemoveNode failed")
}
}
// NewClusterCache return a new clusterCache。
func NewClusterCache(
cluster *rocketv1alpha1.Cluster,
kubeclientset kubernetes.Interface,
nodeInformer corev1informers.NodeInformer,
podInformer corev1informers.PodInformer) *clusterCache {
stop := make(chan struct{})
clusterCacheController := &clusterCache{
name: cluster.Name,
region: cluster.Spec.Region,
area: cluster.Spec.CloudArea,
Taint: cluster.Spec.Taints,
schedCache: schedcache.New(durationToExpireAssumedPod, stop),
client: kubeclientset,
nodesLister: nodeInformer.Lister(),
nodeSynced: nodeInformer.Informer().HasSynced,
podLister: podInformer.Lister(),
podSynced: podInformer.Informer().HasSynced,
}
podInformer.Informer().AddEventHandler(cache.FilteringResourceEventHandler{
FilterFunc: func(obj interface{}) bool {
switch t := obj.(type) {
case *v1.Pod:
return assignedPod(t)
case cache.DeletedFinalStateUnknown:
if _, ok := t.Obj.(*v1.Pod); ok {
// The carried object may be stale, so we don't use it to check if
// it's assigned or not. Attempting to cleanup anyways.
return true
}
utilruntime.HandleError(fmt.Errorf("unable to convert object %T to *v1.Pod in %T", obj, clusterCacheController))
return false
default:
utilruntime.HandleError(fmt.Errorf("unable to handle object in %T: %T", clusterCacheController, obj))
return false
}
},
Handler: cache.ResourceEventHandlerFuncs{
AddFunc: clusterCacheController.addPodToCache,
UpdateFunc: clusterCacheController.updatePodInCache,
DeleteFunc: clusterCacheController.deletePodFromCache,
},
})
nodeInformer.Informer().AddEventHandler(cache.ResourceEventHandlerFuncs{
AddFunc: clusterCacheController.addNodeToCache,
UpdateFunc: clusterCacheController.updateNodeInCache,
DeleteFunc: clusterCacheController.deleteNodeFromCache,
})
return clusterCacheController
}
// assignedPod selects pods that are assigned (scheduled and running).
func assignedPod(pod *v1.Pod) bool {
return len(pod.Spec.NodeName) != 0
}