Client go upgrade v6 (#352)

There are shortcuts in this code, i.e. we created the deepcopy function
by using the deepcopy package instead of the generated code, that will
be addressed once migrated to client-go v8. Also, some objects,
particularly statefulsets, are still taken from v1beta, this will also
be addressed in further commits once the changes are stabilized.

pkg/controller/controller.go

@@ -9,8 +9,8 @@ import (
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/apimachinery/pkg/types"
 	"k8s.io/client-go/kubernetes/scheme"
-	"k8s.io/client-go/pkg/api/v1"
-	rbacv1beta1 "k8s.io/client-go/pkg/apis/rbac/v1beta1"
+	"k8s.io/api/core/v1"
+	rbacv1beta1 "k8s.io/api/rbac/v1beta1"
 	"k8s.io/client-go/tools/cache"
 
 	"github.com/zalando-incubator/postgres-operator/pkg/apiserver"

pkg/controller/node.go

@@ -5,7 +5,7 @@ import (
 	"k8s.io/apimachinery/pkg/labels"
 	"k8s.io/apimachinery/pkg/runtime"
 	"k8s.io/apimachinery/pkg/watch"
-	"k8s.io/client-go/pkg/api/v1"
+	"k8s.io/api/core/v1"
 
 	"github.com/zalando-incubator/postgres-operator/pkg/cluster"
 	"github.com/zalando-incubator/postgres-operator/pkg/util"

pkg/controller/node_test.go

@@ -5,7 +5,7 @@ import (
 
 	"github.com/zalando-incubator/postgres-operator/pkg/spec"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
-	"k8s.io/client-go/pkg/api/v1"
+	"k8s.io/api/core/v1"
 )
 
 const (

pkg/controller/pod.go

@@ -4,7 +4,7 @@ import (
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/apimachinery/pkg/runtime"
 	"k8s.io/apimachinery/pkg/watch"
-	"k8s.io/client-go/pkg/api/v1"
+	"k8s.io/api/core/v1"
 
 	"github.com/zalando-incubator/postgres-operator/pkg/spec"
 	"github.com/zalando-incubator/postgres-operator/pkg/util"

pkg/controller/postgresql.go

@@ -147,12 +147,12 @@ func (d *crdDecoder) Decode() (action watch.EventType, object runtime.Object, er
 
 func (c *Controller) clusterWatchFunc(options metav1.ListOptions) (watch.Interface, error) {
 	options.Watch = true
+	// MIGRATION: FieldsSelectorParam(nil)
 	r, err := c.KubeClient.CRDREST.
 		Get().
 		Namespace(c.opConfig.WatchedNamespace).
 		Resource(constants.PostgresCRDResource).
 		VersionedParams(&options, metav1.ParameterCodec).
-		FieldsSelectorParam(nil).
 		Stream()
 
 	if err != nil {

pkg/controller/util.go

@@ -6,7 +6,7 @@ import (
 	apiextv1beta1 "k8s.io/apiextensions-apiserver/pkg/apis/apiextensions/v1beta1"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/apimachinery/pkg/util/wait"
-	"k8s.io/client-go/pkg/api/v1"
+	"k8s.io/api/core/v1"
 
 	"github.com/zalando-incubator/postgres-operator/pkg/cluster"
 	"github.com/zalando-incubator/postgres-operator/pkg/spec"

pkg/controller/util_test.go

@@ -8,7 +8,7 @@ import (
 	b64 "encoding/base64"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	v1core "k8s.io/client-go/kubernetes/typed/core/v1"
-	"k8s.io/client-go/pkg/api/v1"
+	"k8s.io/api/core/v1"
 
 	"github.com/zalando-incubator/postgres-operator/pkg/spec"
 	"github.com/zalando-incubator/postgres-operator/pkg/util/k8sutil"