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Add pod owner attributes for RDMA metrics
Signed-off-by: lou-lan <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,172 @@ | ||
| // Copyright 2024 Authors of spidernet-io | ||
| // SPDX-License-Identifier: Apache-2.0 | ||
|
|
||
| package podownercache | ||
|
|
||
| import ( | ||
| "context" | ||
| "fmt" | ||
| "github.com/spidernet-io/spiderpool/pkg/lock" | ||
| "github.com/spidernet-io/spiderpool/pkg/logutils" | ||
| "go.uber.org/zap" | ||
| corev1 "k8s.io/api/core/v1" | ||
| metav1 "k8s.io/apimachinery/pkg/apis/meta/v1" | ||
| "k8s.io/apimachinery/pkg/apis/meta/v1/unstructured" | ||
| "k8s.io/apimachinery/pkg/types" | ||
| "k8s.io/client-go/tools/cache" | ||
| "sigs.k8s.io/controller-runtime/pkg/client" | ||
| ) | ||
|
|
||
| type PodOwnerCache struct { | ||
| ctx context.Context | ||
| apiReader client.Reader | ||
|
|
||
| cacheLock lock.RWMutex | ||
| pods map[types.NamespacedName]Pod | ||
| ipToPod map[string]types.NamespacedName | ||
| } | ||
|
|
||
| type Pod struct { | ||
| types.NamespacedName | ||
| OwnerInfo OwnerInfo | ||
| IPs []string | ||
| } | ||
|
|
||
| type OwnerInfo struct { | ||
| APIVersion string | ||
| Kind string | ||
| Namespace string | ||
| Name string | ||
| } | ||
|
|
||
| type CacheInterface interface { | ||
| GetPodByIP(ip string) *Pod | ||
| } | ||
|
|
||
| var logger *zap.Logger | ||
|
|
||
| func New(ctx context.Context, podInformer cache.SharedIndexInformer, apiReader client.Reader) (CacheInterface, error) { | ||
| logger = logutils.Logger.Named("PodOwnerCache") | ||
| logger.Info("create PodOwnerCache informer") | ||
|
|
||
| res := &PodOwnerCache{ | ||
| ctx: ctx, | ||
| apiReader: apiReader, | ||
| cacheLock: lock.RWMutex{}, | ||
| pods: make(map[types.NamespacedName]Pod), | ||
| ipToPod: make(map[string]types.NamespacedName), | ||
| } | ||
|
|
||
| _, err := podInformer.AddEventHandler(cache.ResourceEventHandlerFuncs{ | ||
| AddFunc: res.onPodAdd, | ||
| UpdateFunc: res.onPodUpdate, | ||
| DeleteFunc: res.onPodDel, | ||
| }) | ||
| if nil != err { | ||
| logger.Error(err.Error()) | ||
| return nil, err | ||
| } | ||
|
|
||
| return res, nil | ||
| } | ||
|
|
||
| func (s *PodOwnerCache) onPodAdd(obj interface{}) { | ||
| if pod, ok := obj.(*corev1.Pod); ok { | ||
| if pod.Spec.HostNetwork { | ||
| return | ||
| } | ||
| if len(pod.Status.PodIPs) > 0 { | ||
| ips := make([]string, 0, len(pod.Status.PodIPs)) | ||
| for _, p := range pod.Status.PodIPs { | ||
| ips = append(ips, p.IP) | ||
| } | ||
| owner, err := s.getFinalOwner(pod) | ||
| if err != nil { | ||
| logger.Warn("", zap.Error(err)) | ||
| return | ||
| } | ||
| s.cacheLock.Lock() | ||
| defer s.cacheLock.Unlock() | ||
| key := types.NamespacedName{Namespace: pod.Namespace, Name: pod.Name} | ||
| s.pods[key] = Pod{ | ||
| NamespacedName: key, | ||
| OwnerInfo: *owner, | ||
| IPs: ips, | ||
| } | ||
| for _, ip := range ips { | ||
| s.ipToPod[ip] = key | ||
| } | ||
| } | ||
| } | ||
| } | ||
|
|
||
| func (s *PodOwnerCache) onPodUpdate(oldObj, newObj interface{}) { | ||
| s.onPodAdd(newObj) | ||
| } | ||
|
|
||
| func (s *PodOwnerCache) onPodDel(obj interface{}) { | ||
| if pod, ok := obj.(*corev1.Pod); ok { | ||
| s.cacheLock.Lock() | ||
| defer s.cacheLock.Unlock() | ||
|
|
||
| key := types.NamespacedName{Namespace: pod.Namespace, Name: pod.Name} | ||
| if _, ok := s.pods[key]; !ok { | ||
| return | ||
| } | ||
| for _, ip := range s.pods[key].IPs { | ||
| delete(s.ipToPod, ip) | ||
| } | ||
| delete(s.pods, key) | ||
| } | ||
| } | ||
|
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| func (s *PodOwnerCache) getFinalOwner(obj metav1.Object) (*OwnerInfo, error) { | ||
| var finalOwner *OwnerInfo | ||
|
|
||
| for { | ||
| ownerRefs := obj.GetOwnerReferences() | ||
| if len(ownerRefs) == 0 { | ||
| break | ||
| } | ||
|
|
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| ownerRef := ownerRefs[0] // Assuming the first owner reference | ||
| finalOwner = &OwnerInfo{ | ||
| APIVersion: ownerRef.APIVersion, | ||
| Kind: ownerRef.Kind, | ||
| Namespace: obj.GetNamespace(), | ||
| Name: ownerRef.Name, | ||
| } | ||
|
|
||
| // Prepare an empty object of the owner kind | ||
| ownerObj := &unstructured.Unstructured{} | ||
| ownerObj.SetAPIVersion(ownerRef.APIVersion) | ||
| ownerObj.SetKind(ownerRef.Kind) | ||
|
|
||
| err := s.apiReader.Get(s.ctx, client.ObjectKey{ | ||
| Namespace: obj.GetNamespace(), | ||
| Name: ownerRef.Name, | ||
| }, ownerObj) | ||
| if err != nil { | ||
| return nil, fmt.Errorf("error fetching owner: %v", err) | ||
| } | ||
|
|
||
| // Set obj to the current owner to continue the loop | ||
| obj = ownerObj | ||
| } | ||
|
|
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| return finalOwner, nil | ||
| } | ||
|
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| func (s *PodOwnerCache) GetPodByIP(ip string) *Pod { | ||
| s.cacheLock.RLock() | ||
| defer s.cacheLock.RUnlock() | ||
| item, exists := s.ipToPod[ip] | ||
| if !exists { | ||
| return nil | ||
| } | ||
| pod, exists := s.pods[item] | ||
| if !exists { | ||
| return nil | ||
| } | ||
| return &pod | ||
| } | ||
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