Add webhook and anon auth support

Auth is not automatically enabled because this requires some
bootstrapping to work.
I'll leave this for some future work.
In the meantime people can use the current code similar to how they used
the node-cli code to inject their own auth.

node/nodeutil/provider.go

@@ -8,6 +8,7 @@ import (
 	"github.com/virtual-kubelet/virtual-kubelet/node/api"
 	"github.com/virtual-kubelet/virtual-kubelet/node/api/statsv1alpha1"
 	v1 "k8s.io/api/core/v1"
+	"k8s.io/apimachinery/pkg/labels"
 	corev1listers "k8s.io/client-go/listers/core/v1"
 )
 
@@ -45,3 +46,25 @@ type ProviderConfig struct {
 // NewProviderFunc is used from NewNodeFromClient to bootstrap a provider using the client/listers/etc created there.
 // If a nil node provider is returned a default one will be used.
 type NewProviderFunc func(ProviderConfig) (Provider, node.NodeProvider, error)
+
+// AttachProviderRoutes returns a NodeOpt which uses api.PodHandler to attach the routes to the provider functions.
+//
+// Note this only attaches routes, you'll need to ensure to set the handler in the node config.
+func AttachProviderRoutes(mux api.ServeMux) NodeOpt {
+	return func(cfg *NodeConfig) error {
+		cfg.routeAttacher = func(p Provider, cfg NodeConfig, pods corev1listers.PodLister) {
+			mux.Handle("/", api.PodHandler(api.PodHandlerConfig{
+				RunInContainer:   p.RunInContainer,
+				GetContainerLogs: p.GetContainerLogs,
+				GetPods:          p.GetPods,
+				GetPodsFromKubernetes: func(context.Context) ([]*v1.Pod, error) {
+					return pods.List(labels.Everything())
+				},
+				GetStatsSummary:       p.GetStatsSummary,
+				StreamIdleTimeout:     cfg.StreamIdleTimeout,
+				StreamCreationTimeout: cfg.StreamCreationTimeout,
+			}, true))
+		}
+		return nil
+	}
+}