|
| 1 | +package k8s |
| 2 | + |
| 3 | +import ( |
| 4 | + "github.com/golang/glog" |
| 5 | + meta_v1 "k8s.io/apimachinery/pkg/apis/meta/v1" |
| 6 | + "k8s.io/apimachinery/pkg/apis/meta/v1/unstructured" |
| 7 | + "k8s.io/apimachinery/pkg/fields" |
| 8 | + "k8s.io/client-go/dynamic/dynamicinformer" |
| 9 | + "k8s.io/client-go/tools/cache" |
| 10 | +) |
| 11 | + |
| 12 | +func createIngressLinkHandlers(lbc *LoadBalancerController) cache.ResourceEventHandlerFuncs { |
| 13 | + return cache.ResourceEventHandlerFuncs{ |
| 14 | + AddFunc: func(obj interface{}) { |
| 15 | + link := obj.(*unstructured.Unstructured) |
| 16 | + glog.V(3).Infof("Adding IngressLink: %v", link.GetName()) |
| 17 | + lbc.AddSyncQueue(link) |
| 18 | + }, |
| 19 | + DeleteFunc: func(obj interface{}) { |
| 20 | + link, isUnstructured := obj.(*unstructured.Unstructured) |
| 21 | + |
| 22 | + if !isUnstructured { |
| 23 | + deletedState, ok := obj.(cache.DeletedFinalStateUnknown) |
| 24 | + if !ok { |
| 25 | + glog.V(3).Infof("Error received unexpected object: %v", obj) |
| 26 | + return |
| 27 | + } |
| 28 | + link, ok = deletedState.Obj.(*unstructured.Unstructured) |
| 29 | + if !ok { |
| 30 | + glog.V(3).Infof("Error DeletedFinalStateUnknown contained non-Unstructured object: %v", deletedState.Obj) |
| 31 | + return |
| 32 | + } |
| 33 | + } |
| 34 | + |
| 35 | + glog.V(3).Infof("Removing IngressLink: %v", link.GetName()) |
| 36 | + lbc.AddSyncQueue(link) |
| 37 | + }, |
| 38 | + UpdateFunc: func(old, cur interface{}) { |
| 39 | + oldLink := old.(*unstructured.Unstructured) |
| 40 | + curLink := cur.(*unstructured.Unstructured) |
| 41 | + different, err := areResourcesDifferent(oldLink, curLink) |
| 42 | + if err != nil { |
| 43 | + glog.V(3).Infof("Error when comparing IngressLinks: %v", err) |
| 44 | + lbc.AddSyncQueue(curLink) |
| 45 | + } |
| 46 | + if different { |
| 47 | + glog.V(3).Infof("IngressLink %v changed, syncing", oldLink.GetName()) |
| 48 | + lbc.AddSyncQueue(curLink) |
| 49 | + } |
| 50 | + }, |
| 51 | + } |
| 52 | +} |
| 53 | + |
| 54 | +func (lbc *LoadBalancerController) addIngressLinkHandler(handlers cache.ResourceEventHandlerFuncs, name string) { |
| 55 | + optionsModifier := func(options *meta_v1.ListOptions) { |
| 56 | + options.FieldSelector = fields.Set{"metadata.name": name}.String() |
| 57 | + } |
| 58 | + |
| 59 | + informer := dynamicinformer.NewFilteredDynamicInformer(lbc.dynClient, ingressLinkGVR, lbc.controllerNamespace, lbc.resync, |
| 60 | + cache.Indexers{cache.NamespaceIndex: cache.MetaNamespaceIndexFunc}, optionsModifier) |
| 61 | + |
| 62 | + informer.Informer().AddEventHandlerWithResyncPeriod(handlers, lbc.resync) //nolint:errcheck,gosec |
| 63 | + |
| 64 | + lbc.ingressLinkInformer = informer.Informer() |
| 65 | + lbc.ingressLinkLister = informer.Informer().GetStore() |
| 66 | + |
| 67 | + lbc.cacheSyncs = append(lbc.cacheSyncs, lbc.ingressLinkInformer.HasSynced) |
| 68 | +} |
| 69 | + |
| 70 | +func (lbc *LoadBalancerController) syncIngressLink(task task) { |
| 71 | + key := task.Key |
| 72 | + glog.V(2).Infof("Adding, Updating or Deleting IngressLink: %v", key) |
| 73 | + |
| 74 | + obj, exists, err := lbc.ingressLinkLister.GetByKey(key) |
| 75 | + if err != nil { |
| 76 | + lbc.syncQueue.Requeue(task, err) |
| 77 | + return |
| 78 | + } |
| 79 | + |
| 80 | + if !exists { |
| 81 | + // IngressLink got removed |
| 82 | + lbc.statusUpdater.ClearStatusFromIngressLink() |
| 83 | + } else { |
| 84 | + // IngressLink is added or updated |
| 85 | + link := obj.(*unstructured.Unstructured) |
| 86 | + |
| 87 | + // spec.virtualServerAddress contains the IP of the BIG-IP device |
| 88 | + ip, found, err := unstructured.NestedString(link.Object, "spec", "virtualServerAddress") |
| 89 | + if err != nil { |
| 90 | + glog.Errorf("Failed to get virtualServerAddress from IngressLink %s: %v", key, err) |
| 91 | + lbc.statusUpdater.ClearStatusFromIngressLink() |
| 92 | + } else if !found { |
| 93 | + glog.Errorf("virtualServerAddress is not found in IngressLink %s", key) |
| 94 | + lbc.statusUpdater.ClearStatusFromIngressLink() |
| 95 | + } else if ip == "" { |
| 96 | + glog.Warningf("IngressLink %s has the empty virtualServerAddress field", key) |
| 97 | + lbc.statusUpdater.ClearStatusFromIngressLink() |
| 98 | + } else { |
| 99 | + lbc.statusUpdater.SaveStatusFromIngressLink(ip) |
| 100 | + } |
| 101 | + } |
| 102 | + |
| 103 | + if lbc.reportStatusEnabled() { |
| 104 | + ingresses := lbc.configuration.GetResourcesWithFilter(resourceFilter{Ingresses: true}) |
| 105 | + |
| 106 | + glog.V(3).Infof("Updating status for %v Ingresses", len(ingresses)) |
| 107 | + |
| 108 | + err := lbc.statusUpdater.UpdateExternalEndpointsForResources(ingresses) |
| 109 | + if err != nil { |
| 110 | + glog.Errorf("Error updating ingress status in syncIngressLink: %v", err) |
| 111 | + } |
| 112 | + } |
| 113 | + |
| 114 | + if lbc.areCustomResourcesEnabled && lbc.reportCustomResourceStatusEnabled() { |
| 115 | + virtualServers := lbc.configuration.GetResourcesWithFilter(resourceFilter{VirtualServers: true}) |
| 116 | + |
| 117 | + glog.V(3).Infof("Updating status for %v VirtualServers", len(virtualServers)) |
| 118 | + |
| 119 | + err := lbc.statusUpdater.UpdateExternalEndpointsForResources(virtualServers) |
| 120 | + if err != nil { |
| 121 | + glog.V(3).Infof("Error updating VirtualServer/VirtualServerRoute status in syncIngressLink: %v", err) |
| 122 | + } |
| 123 | + } |
| 124 | +} |
0 commit comments