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| 1 | +package gateway |
| 2 | + |
| 3 | +import ( |
| 4 | + "context" |
| 5 | + "fmt" |
| 6 | + "time" |
| 7 | + |
| 8 | + apierrors "k8s.io/apimachinery/pkg/api/errors" |
| 9 | + metav1 "k8s.io/apimachinery/pkg/apis/meta/v1" |
| 10 | + "k8s.io/apimachinery/pkg/util/runtime" |
| 11 | + "k8s.io/apimachinery/pkg/util/wait" |
| 12 | + "k8s.io/client-go/tools/cache" |
| 13 | + "k8s.io/client-go/util/workqueue" |
| 14 | + "k8s.io/klog/v2" |
| 15 | + "k8s.io/utils/ptr" |
| 16 | + |
| 17 | + gatewayv1 "sigs.k8s.io/gateway-api/apis/v1" |
| 18 | + gatewayclient "sigs.k8s.io/gateway-api/pkg/client/clientset/versioned" |
| 19 | + gatewayinformers "sigs.k8s.io/gateway-api/pkg/client/informers/externalversions/apis/v1" |
| 20 | + gatewaylisters "sigs.k8s.io/gateway-api/pkg/client/listers/apis/v1" |
| 21 | +) |
| 22 | + |
| 23 | +const ( |
| 24 | + controllerName = "kind.sigs.k8s.io/gateway-controller" |
| 25 | + gwClassName = "cloud-provider-kind" |
| 26 | + maxRetries = 5 |
| 27 | + workers = 5 |
| 28 | +) |
| 29 | + |
| 30 | +type Controller struct { |
| 31 | + gwClient gatewayclient.Interface |
| 32 | + gatewayLister gatewaylisters.GatewayLister |
| 33 | + gatewayListerSynced cache.InformerSynced |
| 34 | + gatewayqueue workqueue.TypedRateLimitingInterface[string] |
| 35 | + |
| 36 | + httprouteLister gatewaylisters.HTTPRouteLister |
| 37 | + httprouteListerSynced cache.InformerSynced |
| 38 | + httproutequeue workqueue.TypedRateLimitingInterface[string] |
| 39 | + |
| 40 | + grpcrouteLister gatewaylisters.GRPCRouteLister |
| 41 | + grpcrouteListerSynced cache.InformerSynced |
| 42 | + grpcroutequeue workqueue.TypedRateLimitingInterface[string] |
| 43 | +} |
| 44 | + |
| 45 | +func New( |
| 46 | + gwClient *gatewayclient.Clientset, |
| 47 | + gatewayInformer gatewayinformers.GatewayInformer, |
| 48 | + httprouteInformer gatewayinformers.HTTPRouteInformer, |
| 49 | + grpcrouteInformer gatewayinformers.GRPCRouteInformer, |
| 50 | +) (*Controller, error) { |
| 51 | + c := &Controller{ |
| 52 | + gwClient: gwClient, |
| 53 | + gatewayLister: gatewayInformer.Lister(), |
| 54 | + gatewayListerSynced: gatewayInformer.Informer().HasSynced, |
| 55 | + gatewayqueue: workqueue.NewTypedRateLimitingQueueWithConfig( |
| 56 | + workqueue.DefaultTypedControllerRateLimiter[string](), |
| 57 | + workqueue.TypedRateLimitingQueueConfig[string]{Name: "gateway"}, |
| 58 | + ), |
| 59 | + httprouteLister: httprouteInformer.Lister(), |
| 60 | + httprouteListerSynced: httprouteInformer.Informer().HasSynced, |
| 61 | + httproutequeue: workqueue.NewTypedRateLimitingQueueWithConfig( |
| 62 | + workqueue.DefaultTypedControllerRateLimiter[string](), |
| 63 | + workqueue.TypedRateLimitingQueueConfig[string]{Name: "httproute"}, |
| 64 | + ), |
| 65 | + grpcrouteLister: grpcrouteInformer.Lister(), |
| 66 | + grpcrouteListerSynced: grpcrouteInformer.Informer().HasSynced, |
| 67 | + grpcroutequeue: workqueue.NewTypedRateLimitingQueueWithConfig( |
| 68 | + workqueue.DefaultTypedControllerRateLimiter[string](), |
| 69 | + workqueue.TypedRateLimitingQueueConfig[string]{Name: "grpcroute"}, |
| 70 | + ), |
| 71 | + } |
| 72 | + |
| 73 | + _, err := gatewayInformer.Informer().AddEventHandler(cache.ResourceEventHandlerFuncs{ |
| 74 | + AddFunc: func(obj interface{}) { |
| 75 | + gw := obj.(*gatewayv1.Gateway) |
| 76 | + if gw.Spec.GatewayClassName != gwClassName { |
| 77 | + return |
| 78 | + } |
| 79 | + key, err := cache.DeletionHandlingMetaNamespaceKeyFunc(obj) |
| 80 | + if err == nil { |
| 81 | + c.gatewayqueue.Add(key) |
| 82 | + } |
| 83 | + }, |
| 84 | + UpdateFunc: func(oldObj, newObj interface{}) { |
| 85 | + gw := newObj.(*gatewayv1.Gateway) |
| 86 | + if gw.Spec.GatewayClassName != gwClassName { |
| 87 | + return |
| 88 | + } |
| 89 | + key, err := cache.DeletionHandlingMetaNamespaceKeyFunc(newObj) |
| 90 | + if err == nil { |
| 91 | + c.gatewayqueue.Add(key) |
| 92 | + } |
| 93 | + }, |
| 94 | + DeleteFunc: func(obj interface{}) { |
| 95 | + gw := obj.(*gatewayv1.Gateway) |
| 96 | + if gw.Spec.GatewayClassName != gwClassName { |
| 97 | + return |
| 98 | + } |
| 99 | + key, err := cache.DeletionHandlingMetaNamespaceKeyFunc(obj) |
| 100 | + if err == nil { |
| 101 | + c.gatewayqueue.Add(key) |
| 102 | + } |
| 103 | + }, |
| 104 | + }) |
| 105 | + if err != nil { |
| 106 | + return nil, err |
| 107 | + } |
| 108 | + |
| 109 | + _, err = httprouteInformer.Informer().AddEventHandler(cache.ResourceEventHandlerFuncs{ |
| 110 | + AddFunc: func(obj interface{}) { |
| 111 | + key, err := cache.DeletionHandlingMetaNamespaceKeyFunc(obj) |
| 112 | + if err == nil { |
| 113 | + c.httproutequeue.Add(key) |
| 114 | + } |
| 115 | + }, |
| 116 | + UpdateFunc: func(oldObj, newObj interface{}) { |
| 117 | + key, err := cache.DeletionHandlingMetaNamespaceKeyFunc(newObj) |
| 118 | + if err == nil { |
| 119 | + c.httproutequeue.Add(key) |
| 120 | + } |
| 121 | + }, |
| 122 | + DeleteFunc: func(obj interface{}) { |
| 123 | + key, err := cache.DeletionHandlingMetaNamespaceKeyFunc(obj) |
| 124 | + if err == nil { |
| 125 | + c.httproutequeue.Add(key) |
| 126 | + } |
| 127 | + }, |
| 128 | + }) |
| 129 | + if err != nil { |
| 130 | + return nil, err |
| 131 | + } |
| 132 | + |
| 133 | + _, err = grpcrouteInformer.Informer().AddEventHandler(cache.ResourceEventHandlerFuncs{ |
| 134 | + AddFunc: func(obj interface{}) { |
| 135 | + key, err := cache.DeletionHandlingMetaNamespaceKeyFunc(obj) |
| 136 | + if err == nil { |
| 137 | + c.grpcroutequeue.Add(key) |
| 138 | + } |
| 139 | + }, |
| 140 | + UpdateFunc: func(oldObj, newObj interface{}) { |
| 141 | + key, err := cache.DeletionHandlingMetaNamespaceKeyFunc(newObj) |
| 142 | + if err == nil { |
| 143 | + c.grpcroutequeue.Add(key) |
| 144 | + } |
| 145 | + }, |
| 146 | + DeleteFunc: func(obj interface{}) { |
| 147 | + key, err := cache.DeletionHandlingMetaNamespaceKeyFunc(obj) |
| 148 | + if err == nil { |
| 149 | + c.grpcroutequeue.Add(key) |
| 150 | + } |
| 151 | + }, |
| 152 | + }) |
| 153 | + if err != nil { |
| 154 | + return nil, err |
| 155 | + } |
| 156 | + |
| 157 | + return c, nil |
| 158 | +} |
| 159 | + |
| 160 | +// Run begins watching and syncing. |
| 161 | +func (c *Controller) Run(ctx context.Context) error { |
| 162 | + defer runtime.HandleCrashWithContext(ctx) |
| 163 | + |
| 164 | + // Let the workers stop when we are done |
| 165 | + defer c.gatewayqueue.ShutDown() |
| 166 | + defer c.httproutequeue.ShutDown() |
| 167 | + defer c.grpcroutequeue.ShutDown() |
| 168 | + klog.Info("Starting Gateway API controller") |
| 169 | + |
| 170 | + // Create GatewayClass if it does not exist |
| 171 | + gwClass := gatewayv1.GatewayClass{ |
| 172 | + ObjectMeta: metav1.ObjectMeta{ |
| 173 | + Name: gwClassName, |
| 174 | + }, |
| 175 | + Spec: gatewayv1.GatewayClassSpec{ |
| 176 | + ControllerName: controllerName, |
| 177 | + Description: ptr.To("cloud-provider-kind gateway API"), |
| 178 | + }, |
| 179 | + } |
| 180 | + |
| 181 | + if _, err := c.gwClient.GatewayV1().GatewayClasses().Get(ctx, gwClassName, metav1.GetOptions{}); apierrors.IsNotFound(err) { |
| 182 | + _, err := c.gwClient.GatewayV1().GatewayClasses().Create(ctx, &gwClass, metav1.CreateOptions{}) |
| 183 | + if err != nil { |
| 184 | + klog.Infof("faile to create cloud-provider-kind GatewayClass: %v") |
| 185 | + return err |
| 186 | + } |
| 187 | + } |
| 188 | + |
| 189 | + // Wait for all involved caches to be synced, before processing items from the queue is started |
| 190 | + if !cache.WaitForNamedCacheSync(controllerName, ctx.Done(), c.gatewayListerSynced, c.httprouteListerSynced, c.grpcrouteListerSynced) { |
| 191 | + return fmt.Errorf("Timed out waiting for caches to sync") |
| 192 | + } |
| 193 | + |
| 194 | + for i := 0; i < workers; i++ { |
| 195 | + go wait.UntilWithContext(ctx, c.runGatewayWorker, time.Second) |
| 196 | + go wait.UntilWithContext(ctx, c.runHTTPRouteWorker, time.Second) |
| 197 | + go wait.UntilWithContext(ctx, c.runGRPCrouteWorker, time.Second) |
| 198 | + } |
| 199 | + |
| 200 | + <-ctx.Done() |
| 201 | + klog.Info("Stopping Gateway API controller") |
| 202 | + return nil |
| 203 | +} |
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