add controllers

change kiali mux to go-restful

add knative

cmd/controller-manager/app/helper.go

@@ -0,0 +1,38 @@
+package app
+
+import (
+	"fmt"
+	"k8s.io/apiextensions-apiserver/pkg/client/clientset/clientset"
+	"k8s.io/apimachinery/pkg/util/wait"
+	"k8s.io/klog"
+	"net/http"
+	"time"
+)
+
+// WaitForAPIServer waits for the API Server's /healthz endpoint to report "ok" with timeout.
+func WaitForAPIServer(client clientset.Interface, timeout time.Duration) error {
+	var lastErr error
+
+	err := wait.PollImmediate(time.Second, timeout, func() (bool, error) {
+		healthStatus := 0
+		result := client.Discovery().RESTClient().Get().AbsPath("/healthz").Do().StatusCode(&healthStatus)
+		if result.Error() != nil {
+			lastErr = fmt.Errorf("failed to get apiserver /healthz status: %v", result.Error())
+			return false, nil
+		}
+		if healthStatus != http.StatusOK {
+			content, _ := result.Raw()
+			lastErr = fmt.Errorf("APIServer isn't healthy: %v", string(content))
+			klog.Warningf("APIServer isn't healthy yet: %v. Waiting a little while.", string(content))
+			return false, nil
+		}
+
+		return true, nil
+	})
+
+	if err != nil {
+		return fmt.Errorf("%v: %v", err, lastErr)
+	}
+
+	return nil
+}