Replace initializers with mutation webhook for workloads (#363)

Author: Md. Emruz Hossain

root.go

@@ -16,6 +16,7 @@ import (
 	"github.com/spf13/pflag"
 	genericapiserver "k8s.io/apiserver/pkg/server"
 	clientsetscheme "k8s.io/client-go/kubernetes/scheme"
+	"k8s.io/kubernetes/pkg/api/legacyscheme"
 )
 
 const (
@@ -41,6 +42,7 @@ func NewRootCmd() *cobra.Command {
 				}
 			}
 			scheme.AddToScheme(clientsetscheme.Scheme)
+			scheme.AddToScheme(legacyscheme.Scheme)
 			util.LoggerOptions = golog.ParseFlags(c.Flags())
 		},
 	}

server/options.go

@@ -6,9 +6,7 @@ import (
 
 	stringz "github.com/appscode/go/strings"
 	v "github.com/appscode/go/version"
-	hookapi "github.com/appscode/kutil/admission/api"
 	cs "github.com/appscode/stash/client/clientset/versioned"
-	"github.com/appscode/stash/pkg/admission/plugin"
 	"github.com/appscode/stash/pkg/controller"
 	"github.com/appscode/stash/pkg/docker"
 	"github.com/spf13/pflag"
@@ -74,7 +72,5 @@ func (s *ControllerOptions) ApplyTo(cfg *controller.ControllerConfig) error {
 	if cfg.CRDClient, err = crd_cs.NewForConfig(cfg.ClientConfig); err != nil {
 		return err
 	}
-	cfg.AdmissionHooks = []hookapi.AdmissionHook{&plugin.CRDValidator{}}
-
 	return nil
 }