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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,33 @@ | ||
| package linode | ||
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| const ( | ||
| // annLinodeDefaultProtocol is the annotation used to specify the default protocol | ||
| // for Linode load balancers. Options are tcp, http and https. Defaults to tcp. | ||
| annLinodeDefaultProtocol = "service.beta.kubernetes.io/linode-loadbalancer-default-protocol" | ||
| annLinodePortConfigPrefix = "service.beta.kubernetes.io/linode-loadbalancer-port-" | ||
| annLinodeDefaultProxyProtocol = "service.beta.kubernetes.io/linode-loadbalancer-default-proxy-protocol" | ||
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| annLinodeCheckPath = "service.beta.kubernetes.io/linode-loadbalancer-check-path" | ||
| annLinodeCheckBody = "service.beta.kubernetes.io/linode-loadbalancer-check-body" | ||
| annLinodeHealthCheckType = "service.beta.kubernetes.io/linode-loadbalancer-check-type" | ||
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| annLinodeHealthCheckInterval = "service.beta.kubernetes.io/linode-loadbalancer-check-interval" | ||
| annLinodeHealthCheckTimeout = "service.beta.kubernetes.io/linode-loadbalancer-check-timeout" | ||
| annLinodeHealthCheckAttempts = "service.beta.kubernetes.io/linode-loadbalancer-check-attempts" | ||
| annLinodeHealthCheckPassive = "service.beta.kubernetes.io/linode-loadbalancer-check-passive" | ||
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| // annLinodeThrottle is the annotation specifying the value of the Client Connection | ||
| // Throttle, which limits the number of subsequent new connections per second from the | ||
| // same client IP. Options are a number between 1-20, or 0 to disable. Defaults to 20. | ||
| annLinodeThrottle = "service.beta.kubernetes.io/linode-loadbalancer-throttle" | ||
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| annLinodeLoadBalancerPreserve = "service.beta.kubernetes.io/linode-loadbalancer-preserve" | ||
| annLinodeNodeBalancerID = "service.beta.kubernetes.io/linode-loadbalancer-nodebalancer-id" | ||
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| annLinodeHostnameOnlyIngress = "service.beta.kubernetes.io/linode-loadbalancer-hostname-only-ingress" | ||
| annLinodeLoadBalancerTags = "service.beta.kubernetes.io/linode-loadbalancer-tags" | ||
| annLinodeCloudFirewallID = "service.beta.kubernetes.io/linode-loadbalancer-firewall-id" | ||
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| annLinodeNodePrivateIP = "node.k8s.linode.com/private-ip" | ||
| annLinodeHostUUID = "node.k8s.linode.com/host-uuid" | ||
| ) |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,124 @@ | ||
| package linode | ||
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| import ( | ||
| "context" | ||
| "net/http" | ||
| "time" | ||
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| "github.com/appscode/go/wait" | ||
| "github.com/linode/linodego" | ||
| v1 "k8s.io/api/core/v1" | ||
| metav1 "k8s.io/apimachinery/pkg/apis/meta/v1" | ||
| v1informers "k8s.io/client-go/informers/core/v1" | ||
| "k8s.io/client-go/kubernetes" | ||
| "k8s.io/client-go/tools/cache" | ||
| "k8s.io/client-go/util/workqueue" | ||
| "k8s.io/klog/v2" | ||
| ) | ||
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| type nodeController struct { | ||
| client Client | ||
| instances *instances | ||
| kubeclient kubernetes.Interface | ||
| informer v1informers.NodeInformer | ||
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| queue workqueue.DelayingInterface | ||
| } | ||
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| func newNodeController(kubeclient kubernetes.Interface, client Client, informer v1informers.NodeInformer) *nodeController { | ||
| return &nodeController{ | ||
| client: client, | ||
| instances: newInstances(client), | ||
| kubeclient: kubeclient, | ||
| informer: informer, | ||
| queue: workqueue.NewDelayingQueue(), | ||
| } | ||
| } | ||
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| func (s *nodeController) Run(stopCh <-chan struct{}) { | ||
| s.informer.Informer().AddEventHandler(cache.ResourceEventHandlerFuncs{ | ||
| AddFunc: func(obj interface{}) { | ||
| node, ok := obj.(*v1.Node) | ||
| if !ok { | ||
| return | ||
| } | ||
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| klog.Infof("NodeController will handle newly created node (%s) metadata", node.Name) | ||
| s.queue.Add(node) | ||
| }, | ||
| UpdateFunc: func(_, new interface{}) { | ||
| node, ok := new.(*v1.Node) | ||
| if !ok { | ||
| return | ||
| } | ||
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| klog.Infof("NodeController will handle updated node (%s) metadata", node.Name) | ||
| s.queue.Add(node) | ||
| }, | ||
| }) | ||
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| go wait.Until(s.worker, time.Second, stopCh) | ||
| s.informer.Informer().Run(stopCh) | ||
| } | ||
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| // worker runs a worker thread that dequeues new or modified nodes and processes | ||
| // metadata (host UUID) on each of them. | ||
| func (s *nodeController) worker() { | ||
| for s.processNext() { | ||
| } | ||
| } | ||
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| func (s *nodeController) processNext() bool { | ||
| key, quit := s.queue.Get() | ||
| if quit { | ||
| return false | ||
| } | ||
| defer s.queue.Done(key) | ||
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| node, ok := key.(*v1.Node) | ||
| if !ok { | ||
| klog.Errorf("expected dequeued key to be of type *v1.Node but got %T", node) | ||
| return true | ||
| } | ||
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| err := s.handleNodeAdded(context.TODO(), node) | ||
| switch deleteErr := err.(type) { | ||
| case nil: | ||
| break | ||
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| case *linodego.Error: | ||
| if deleteErr.Code >= http.StatusInternalServerError || deleteErr.Code == http.StatusTooManyRequests { | ||
| klog.Errorf("failed to add metadata for node (%s); retrying in 1 minute: %s", node.Name, err) | ||
| s.queue.AddAfter(node, retryInterval) | ||
| } | ||
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| default: | ||
| klog.Errorf("failed to add metadata for node (%s); will not retry: %s", node.Name, err) | ||
| } | ||
| return true | ||
| } | ||
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| func (s *nodeController) handleNodeAdded(ctx context.Context, node *v1.Node) error { | ||
| klog.Infof("NodeController handling node (%s) addition", node.Name) | ||
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| linode, err := s.instances.lookupLinode(ctx, node) | ||
| if err != nil { | ||
| klog.Infof("instance lookup error: %s", err.Error()) | ||
| return err | ||
| } | ||
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| uuid, ok := node.Labels[annLinodeHostUUID] | ||
| if ok && uuid == linode.HostUUID { | ||
| return nil | ||
| } | ||
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| node.Labels[annLinodeHostUUID] = linode.HostUUID | ||
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| _, err = s.kubeclient.CoreV1().Nodes().Update(ctx, node, metav1.UpdateOptions{}) | ||
| if err != nil { | ||
| klog.Infof("node update error: %s", err.Error()) | ||
| return err | ||
| } | ||
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| return nil | ||
| } |