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refactor IngressLink controller (#6348)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,124 @@ | ||
| package k8s | ||
|
|
||
| import ( | ||
| "github.com/golang/glog" | ||
| meta_v1 "k8s.io/apimachinery/pkg/apis/meta/v1" | ||
| "k8s.io/apimachinery/pkg/apis/meta/v1/unstructured" | ||
| "k8s.io/apimachinery/pkg/fields" | ||
| "k8s.io/client-go/dynamic/dynamicinformer" | ||
| "k8s.io/client-go/tools/cache" | ||
| ) | ||
|
|
||
| func createIngressLinkHandlers(lbc *LoadBalancerController) cache.ResourceEventHandlerFuncs { | ||
| return cache.ResourceEventHandlerFuncs{ | ||
| AddFunc: func(obj interface{}) { | ||
| link := obj.(*unstructured.Unstructured) | ||
| glog.V(3).Infof("Adding IngressLink: %v", link.GetName()) | ||
| lbc.AddSyncQueue(link) | ||
| }, | ||
| DeleteFunc: func(obj interface{}) { | ||
| link, isUnstructured := obj.(*unstructured.Unstructured) | ||
|
|
||
| if !isUnstructured { | ||
| deletedState, ok := obj.(cache.DeletedFinalStateUnknown) | ||
| if !ok { | ||
| glog.V(3).Infof("Error received unexpected object: %v", obj) | ||
| return | ||
| } | ||
| link, ok = deletedState.Obj.(*unstructured.Unstructured) | ||
| if !ok { | ||
| glog.V(3).Infof("Error DeletedFinalStateUnknown contained non-Unstructured object: %v", deletedState.Obj) | ||
| return | ||
| } | ||
| } | ||
|
|
||
| glog.V(3).Infof("Removing IngressLink: %v", link.GetName()) | ||
| lbc.AddSyncQueue(link) | ||
| }, | ||
| UpdateFunc: func(old, cur interface{}) { | ||
| oldLink := old.(*unstructured.Unstructured) | ||
| curLink := cur.(*unstructured.Unstructured) | ||
| different, err := areResourcesDifferent(oldLink, curLink) | ||
| if err != nil { | ||
| glog.V(3).Infof("Error when comparing IngressLinks: %v", err) | ||
| lbc.AddSyncQueue(curLink) | ||
| } | ||
| if different { | ||
| glog.V(3).Infof("IngressLink %v changed, syncing", oldLink.GetName()) | ||
| lbc.AddSyncQueue(curLink) | ||
| } | ||
| }, | ||
| } | ||
| } | ||
|
|
||
| func (lbc *LoadBalancerController) addIngressLinkHandler(handlers cache.ResourceEventHandlerFuncs, name string) { | ||
| optionsModifier := func(options *meta_v1.ListOptions) { | ||
| options.FieldSelector = fields.Set{"metadata.name": name}.String() | ||
| } | ||
|
|
||
| informer := dynamicinformer.NewFilteredDynamicInformer(lbc.dynClient, ingressLinkGVR, lbc.controllerNamespace, lbc.resync, | ||
| cache.Indexers{cache.NamespaceIndex: cache.MetaNamespaceIndexFunc}, optionsModifier) | ||
|
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| informer.Informer().AddEventHandlerWithResyncPeriod(handlers, lbc.resync) //nolint:errcheck,gosec | ||
|
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| lbc.ingressLinkInformer = informer.Informer() | ||
| lbc.ingressLinkLister = informer.Informer().GetStore() | ||
|
|
||
| lbc.cacheSyncs = append(lbc.cacheSyncs, lbc.ingressLinkInformer.HasSynced) | ||
| } | ||
|
|
||
| func (lbc *LoadBalancerController) syncIngressLink(task task) { | ||
| key := task.Key | ||
| glog.V(2).Infof("Adding, Updating or Deleting IngressLink: %v", key) | ||
|
|
||
| obj, exists, err := lbc.ingressLinkLister.GetByKey(key) | ||
| if err != nil { | ||
| lbc.syncQueue.Requeue(task, err) | ||
| return | ||
| } | ||
|
|
||
| if !exists { | ||
| // IngressLink got removed | ||
| lbc.statusUpdater.ClearStatusFromIngressLink() | ||
| } else { | ||
| // IngressLink is added or updated | ||
| link := obj.(*unstructured.Unstructured) | ||
|
|
||
| // spec.virtualServerAddress contains the IP of the BIG-IP device | ||
| ip, found, err := unstructured.NestedString(link.Object, "spec", "virtualServerAddress") | ||
| if err != nil { | ||
| glog.Errorf("Failed to get virtualServerAddress from IngressLink %s: %v", key, err) | ||
| lbc.statusUpdater.ClearStatusFromIngressLink() | ||
| } else if !found { | ||
| glog.Errorf("virtualServerAddress is not found in IngressLink %s", key) | ||
| lbc.statusUpdater.ClearStatusFromIngressLink() | ||
| } else if ip == "" { | ||
| glog.Warningf("IngressLink %s has the empty virtualServerAddress field", key) | ||
| lbc.statusUpdater.ClearStatusFromIngressLink() | ||
| } else { | ||
| lbc.statusUpdater.SaveStatusFromIngressLink(ip) | ||
| } | ||
| } | ||
|
|
||
| if lbc.reportStatusEnabled() { | ||
| ingresses := lbc.configuration.GetResourcesWithFilter(resourceFilter{Ingresses: true}) | ||
|
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||
| glog.V(3).Infof("Updating status for %v Ingresses", len(ingresses)) | ||
|
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| err := lbc.statusUpdater.UpdateExternalEndpointsForResources(ingresses) | ||
| if err != nil { | ||
| glog.Errorf("Error updating ingress status in syncIngressLink: %v", err) | ||
| } | ||
| } | ||
|
|
||
| if lbc.areCustomResourcesEnabled && lbc.reportCustomResourceStatusEnabled() { | ||
| virtualServers := lbc.configuration.GetResourcesWithFilter(resourceFilter{VirtualServers: true}) | ||
|
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| glog.V(3).Infof("Updating status for %v VirtualServers", len(virtualServers)) | ||
|
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| err := lbc.statusUpdater.UpdateExternalEndpointsForResources(virtualServers) | ||
| if err != nil { | ||
| glog.V(3).Infof("Error updating VirtualServer/VirtualServerRoute status in syncIngressLink: %v", err) | ||
| } | ||
| } | ||
| } |