diff --git a/Makefile b/Makefile
index 4e8025a3..1c9edddf 100644
--- a/Makefile
+++ b/Makefile
@@ -62,7 +62,7 @@ ifeq (, $(shell which controller-gen))
 	CONTROLLER_GEN_TMP_DIR=$$(mktemp -d) ;\
 	cd $$CONTROLLER_GEN_TMP_DIR ;\
 	go mod init tmp ;\
-	go get sigs.k8s.io/controller-tools/cmd/controller-gen@v0.3.0 ;\
+	go get sigs.k8s.io/controller-tools/cmd/controller-gen@v0.2.4 ;\
 	rm -rf $$CONTROLLER_GEN_TMP_DIR ;\
 	}
 CONTROLLER_GEN=$(shell go env GOPATH)/bin/controller-gen
diff --git a/config/crd/bases/flinkoperator.k8s.io_flinkclusters.yaml b/config/crd/bases/flinkoperator.k8s.io_flinkclusters.yaml
index 5523698d..195770ef 100644
--- a/config/crd/bases/flinkoperator.k8s.io_flinkclusters.yaml
+++ b/config/crd/bases/flinkoperator.k8s.io_flinkclusters.yaml
@@ -4,7 +4,7 @@ apiVersion: apiextensions.k8s.io/v1beta1
 kind: CustomResourceDefinition
 metadata:
   annotations:
-    controller-gen.kubebuilder.io/version: v0.3.0
+    controller-gen.kubebuilder.io/version: v0.2.4
   creationTimestamp: null
   name: flinkclusters.flinkoperator.k8s.io
 spec:
@@ -85,11 +85,7 @@ spec:
                           containerName:
                             type: string
                           divisor:
-                            anyOf:
-                            - type: integer
-                            - type: string
-                            pattern: ^(\+|-)?(([0-9]+(\.[0-9]*)?)|(\.[0-9]+))(([KMGTPE]i)|[numkMGTPE]|([eE](\+|-)?(([0-9]+(\.[0-9]*)?)|(\.[0-9]+))))?$
-                            x-kubernetes-int-or-string: true
+                            type: string
                           resource:
                             type: string
                         required:
@@ -221,11 +217,7 @@ spec:
                                     containerName:
                                       type: string
                                     divisor:
-                                      anyOf:
-                                      - type: integer
-                                      - type: string
-                                      pattern: ^(\+|-)?(([0-9]+(\.[0-9]*)?)|(\.[0-9]+))(([KMGTPE]i)|[numkMGTPE]|([eE](\+|-)?(([0-9]+(\.[0-9]*)?)|(\.[0-9]+))))?$
-                                      x-kubernetes-int-or-string: true
+                                      type: string
                                     resource:
                                       type: string
                                   required:
@@ -461,10 +453,6 @@ spec:
                           - containerPort
                           type: object
                         type: array
-                        x-kubernetes-list-map-keys:
-                        - containerPort
-                        - protocol
-                        x-kubernetes-list-type: map
                       readinessProbe:
                         properties:
                           exec:
@@ -534,19 +522,11 @@ spec:
                         properties:
                           limits:
                             additionalProperties:
-                              anyOf:
-                              - type: integer
-                              - type: string
-                              pattern: ^(\+|-)?(([0-9]+(\.[0-9]*)?)|(\.[0-9]+))(([KMGTPE]i)|[numkMGTPE]|([eE](\+|-)?(([0-9]+(\.[0-9]*)?)|(\.[0-9]+))))?$
-                              x-kubernetes-int-or-string: true
+                              type: string
                             type: object
                           requests:
                             additionalProperties:
-                              anyOf:
-                              - type: integer
-                              - type: string
-                              pattern: ^(\+|-)?(([0-9]+(\.[0-9]*)?)|(\.[0-9]+))(([KMGTPE]i)|[numkMGTPE]|([eE](\+|-)?(([0-9]+(\.[0-9]*)?)|(\.[0-9]+))))?$
-                              x-kubernetes-int-or-string: true
+                              type: string
                             type: object
                         type: object
                       securityContext:
@@ -731,19 +711,11 @@ spec:
                   properties:
                     limits:
                       additionalProperties:
-                        anyOf:
-                        - type: integer
-                        - type: string
-                        pattern: ^(\+|-)?(([0-9]+(\.[0-9]*)?)|(\.[0-9]+))(([KMGTPE]i)|[numkMGTPE]|([eE](\+|-)?(([0-9]+(\.[0-9]*)?)|(\.[0-9]+))))?$
-                        x-kubernetes-int-or-string: true
+                        type: string
                       type: object
                     requests:
                       additionalProperties:
-                        anyOf:
-                        - type: integer
-                        - type: string
-                        pattern: ^(\+|-)?(([0-9]+(\.[0-9]*)?)|(\.[0-9]+))(([KMGTPE]i)|[numkMGTPE]|([eE](\+|-)?(([0-9]+(\.[0-9]*)?)|(\.[0-9]+))))?$
-                        x-kubernetes-int-or-string: true
+                        type: string
                       type: object
                   type: object
                 restartPolicy:
@@ -985,11 +957,7 @@ spec:
                                     containerName:
                                       type: string
                                     divisor:
-                                      anyOf:
-                                      - type: integer
-                                      - type: string
-                                      pattern: ^(\+|-)?(([0-9]+(\.[0-9]*)?)|(\.[0-9]+))(([KMGTPE]i)|[numkMGTPE]|([eE](\+|-)?(([0-9]+(\.[0-9]*)?)|(\.[0-9]+))))?$
-                                      x-kubernetes-int-or-string: true
+                                      type: string
                                     resource:
                                       type: string
                                   required:
@@ -1005,11 +973,7 @@ spec:
                           medium:
                             type: string
                           sizeLimit:
-                            anyOf:
-                            - type: integer
-                            - type: string
-                            pattern: ^(\+|-)?(([0-9]+(\.[0-9]*)?)|(\.[0-9]+))(([KMGTPE]i)|[numkMGTPE]|([eE](\+|-)?(([0-9]+(\.[0-9]*)?)|(\.[0-9]+))))?$
-                            x-kubernetes-int-or-string: true
+                            type: string
                         type: object
                       fc:
                         properties:
@@ -1234,11 +1198,7 @@ spec:
                                               containerName:
                                                 type: string
                                               divisor:
-                                                anyOf:
-                                                - type: integer
-                                                - type: string
-                                                pattern: ^(\+|-)?(([0-9]+(\.[0-9]*)?)|(\.[0-9]+))(([KMGTPE]i)|[numkMGTPE]|([eE](\+|-)?(([0-9]+(\.[0-9]*)?)|(\.[0-9]+))))?$
-                                                x-kubernetes-int-or-string: true
+                                                type: string
                                               resource:
                                                 type: string
                                             required:
@@ -1507,11 +1467,7 @@ spec:
                                     containerName:
                                       type: string
                                     divisor:
-                                      anyOf:
-                                      - type: integer
-                                      - type: string
-                                      pattern: ^(\+|-)?(([0-9]+(\.[0-9]*)?)|(\.[0-9]+))(([KMGTPE]i)|[numkMGTPE]|([eE](\+|-)?(([0-9]+(\.[0-9]*)?)|(\.[0-9]+))))?$
-                                      x-kubernetes-int-or-string: true
+                                      type: string
                                     resource:
                                       type: string
                                   required:
@@ -1747,10 +1703,6 @@ spec:
                           - containerPort
                           type: object
                         type: array
-                        x-kubernetes-list-map-keys:
-                        - containerPort
-                        - protocol
-                        x-kubernetes-list-type: map
                       readinessProbe:
                         properties:
                           exec:
@@ -1820,19 +1772,11 @@ spec:
                         properties:
                           limits:
                             additionalProperties:
-                              anyOf:
-                              - type: integer
-                              - type: string
-                              pattern: ^(\+|-)?(([0-9]+(\.[0-9]*)?)|(\.[0-9]+))(([KMGTPE]i)|[numkMGTPE]|([eE](\+|-)?(([0-9]+(\.[0-9]*)?)|(\.[0-9]+))))?$
-                              x-kubernetes-int-or-string: true
+                              type: string
                             type: object
                           requests:
                             additionalProperties:
-                              anyOf:
-                              - type: integer
-                              - type: string
-                              pattern: ^(\+|-)?(([0-9]+(\.[0-9]*)?)|(\.[0-9]+))(([KMGTPE]i)|[numkMGTPE]|([eE](\+|-)?(([0-9]+(\.[0-9]*)?)|(\.[0-9]+))))?$
-                              x-kubernetes-int-or-string: true
+                              type: string
                             type: object
                         type: object
                       securityContext:
@@ -1999,11 +1943,7 @@ spec:
                     type: object
                   type: array
                 memoryOffHeapMin:
-                  anyOf:
-                  - type: integer
-                  - type: string
-                  pattern: ^(\+|-)?(([0-9]+(\.[0-9]*)?)|(\.[0-9]+))(([KMGTPE]i)|[numkMGTPE]|([eE](\+|-)?(([0-9]+(\.[0-9]*)?)|(\.[0-9]+))))?$
-                  x-kubernetes-int-or-string: true
+                  type: string
                 memoryOffHeapRatio:
                   format: int32
                   type: integer
@@ -2041,19 +1981,11 @@ spec:
                   properties:
                     limits:
                       additionalProperties:
-                        anyOf:
-                        - type: integer
-                        - type: string
-                        pattern: ^(\+|-)?(([0-9]+(\.[0-9]*)?)|(\.[0-9]+))(([KMGTPE]i)|[numkMGTPE]|([eE](\+|-)?(([0-9]+(\.[0-9]*)?)|(\.[0-9]+))))?$
-                        x-kubernetes-int-or-string: true
+                        type: string
                       type: object
                     requests:
                       additionalProperties:
-                        anyOf:
-                        - type: integer
-                        - type: string
-                        pattern: ^(\+|-)?(([0-9]+(\.[0-9]*)?)|(\.[0-9]+))(([KMGTPE]i)|[numkMGTPE]|([eE](\+|-)?(([0-9]+(\.[0-9]*)?)|(\.[0-9]+))))?$
-                        x-kubernetes-int-or-string: true
+                        type: string
                       type: object
                   type: object
                 securityContext:
@@ -2154,11 +2086,7 @@ spec:
                                     containerName:
                                       type: string
                                     divisor:
-                                      anyOf:
-                                      - type: integer
-                                      - type: string
-                                      pattern: ^(\+|-)?(([0-9]+(\.[0-9]*)?)|(\.[0-9]+))(([KMGTPE]i)|[numkMGTPE]|([eE](\+|-)?(([0-9]+(\.[0-9]*)?)|(\.[0-9]+))))?$
-                                      x-kubernetes-int-or-string: true
+                                      type: string
                                     resource:
                                       type: string
                                   required:
@@ -2394,10 +2322,6 @@ spec:
                           - containerPort
                           type: object
                         type: array
-                        x-kubernetes-list-map-keys:
-                        - containerPort
-                        - protocol
-                        x-kubernetes-list-type: map
                       readinessProbe:
                         properties:
                           exec:
@@ -2467,19 +2391,11 @@ spec:
                         properties:
                           limits:
                             additionalProperties:
-                              anyOf:
-                              - type: integer
-                              - type: string
-                              pattern: ^(\+|-)?(([0-9]+(\.[0-9]*)?)|(\.[0-9]+))(([KMGTPE]i)|[numkMGTPE]|([eE](\+|-)?(([0-9]+(\.[0-9]*)?)|(\.[0-9]+))))?$
-                              x-kubernetes-int-or-string: true
+                              type: string
                             type: object
                           requests:
                             additionalProperties:
-                              anyOf:
-                              - type: integer
-                              - type: string
-                              pattern: ^(\+|-)?(([0-9]+(\.[0-9]*)?)|(\.[0-9]+))(([KMGTPE]i)|[numkMGTPE]|([eE](\+|-)?(([0-9]+(\.[0-9]*)?)|(\.[0-9]+))))?$
-                              x-kubernetes-int-or-string: true
+                              type: string
                             type: object
                         type: object
                       securityContext:
@@ -2692,19 +2608,11 @@ spec:
                             properties:
                               limits:
                                 additionalProperties:
-                                  anyOf:
-                                  - type: integer
-                                  - type: string
-                                  pattern: ^(\+|-)?(([0-9]+(\.[0-9]*)?)|(\.[0-9]+))(([KMGTPE]i)|[numkMGTPE]|([eE](\+|-)?(([0-9]+(\.[0-9]*)?)|(\.[0-9]+))))?$
-                                  x-kubernetes-int-or-string: true
+                                  type: string
                                 type: object
                               requests:
                                 additionalProperties:
-                                  anyOf:
-                                  - type: integer
-                                  - type: string
-                                  pattern: ^(\+|-)?(([0-9]+(\.[0-9]*)?)|(\.[0-9]+))(([KMGTPE]i)|[numkMGTPE]|([eE](\+|-)?(([0-9]+(\.[0-9]*)?)|(\.[0-9]+))))?$
-                                  x-kubernetes-int-or-string: true
+                                  type: string
                                 type: object
                             type: object
                           selector:
@@ -2745,11 +2653,7 @@ spec:
                             type: array
                           capacity:
                             additionalProperties:
-                              anyOf:
-                              - type: integer
-                              - type: string
-                              pattern: ^(\+|-)?(([0-9]+(\.[0-9]*)?)|(\.[0-9]+))(([KMGTPE]i)|[numkMGTPE]|([eE](\+|-)?(([0-9]+(\.[0-9]*)?)|(\.[0-9]+))))?$
-                              x-kubernetes-int-or-string: true
+                              type: string
                             type: object
                           conditions:
                             items:
@@ -2955,11 +2859,7 @@ spec:
                                     containerName:
                                       type: string
                                     divisor:
-                                      anyOf:
-                                      - type: integer
-                                      - type: string
-                                      pattern: ^(\+|-)?(([0-9]+(\.[0-9]*)?)|(\.[0-9]+))(([KMGTPE]i)|[numkMGTPE]|([eE](\+|-)?(([0-9]+(\.[0-9]*)?)|(\.[0-9]+))))?$
-                                      x-kubernetes-int-or-string: true
+                                      type: string
                                     resource:
                                       type: string
                                   required:
@@ -2975,11 +2875,7 @@ spec:
                           medium:
                             type: string
                           sizeLimit:
-                            anyOf:
-                            - type: integer
-                            - type: string
-                            pattern: ^(\+|-)?(([0-9]+(\.[0-9]*)?)|(\.[0-9]+))(([KMGTPE]i)|[numkMGTPE]|([eE](\+|-)?(([0-9]+(\.[0-9]*)?)|(\.[0-9]+))))?$
-                            x-kubernetes-int-or-string: true
+                            type: string
                         type: object
                       fc:
                         properties:
@@ -3204,11 +3100,7 @@ spec:
                                               containerName:
                                                 type: string
                                               divisor:
-                                                anyOf:
-                                                - type: integer
-                                                - type: string
-                                                pattern: ^(\+|-)?(([0-9]+(\.[0-9]*)?)|(\.[0-9]+))(([KMGTPE]i)|[numkMGTPE]|([eE](\+|-)?(([0-9]+(\.[0-9]*)?)|(\.[0-9]+))))?$
-                                                x-kubernetes-int-or-string: true
+                                                type: string
                                               resource:
                                                 type: string
                                             required:
@@ -3472,11 +3364,7 @@ spec:
                                     containerName:
                                       type: string
                                     divisor:
-                                      anyOf:
-                                      - type: integer
-                                      - type: string
-                                      pattern: ^(\+|-)?(([0-9]+(\.[0-9]*)?)|(\.[0-9]+))(([KMGTPE]i)|[numkMGTPE]|([eE](\+|-)?(([0-9]+(\.[0-9]*)?)|(\.[0-9]+))))?$
-                                      x-kubernetes-int-or-string: true
+                                      type: string
                                     resource:
                                       type: string
                                   required:
@@ -3712,10 +3600,6 @@ spec:
                           - containerPort
                           type: object
                         type: array
-                        x-kubernetes-list-map-keys:
-                        - containerPort
-                        - protocol
-                        x-kubernetes-list-type: map
                       readinessProbe:
                         properties:
                           exec:
@@ -3785,19 +3669,11 @@ spec:
                         properties:
                           limits:
                             additionalProperties:
-                              anyOf:
-                              - type: integer
-                              - type: string
-                              pattern: ^(\+|-)?(([0-9]+(\.[0-9]*)?)|(\.[0-9]+))(([KMGTPE]i)|[numkMGTPE]|([eE](\+|-)?(([0-9]+(\.[0-9]*)?)|(\.[0-9]+))))?$
-                              x-kubernetes-int-or-string: true
+                              type: string
                             type: object
                           requests:
                             additionalProperties:
-                              anyOf:
-                              - type: integer
-                              - type: string
-                              pattern: ^(\+|-)?(([0-9]+(\.[0-9]*)?)|(\.[0-9]+))(([KMGTPE]i)|[numkMGTPE]|([eE](\+|-)?(([0-9]+(\.[0-9]*)?)|(\.[0-9]+))))?$
-                              x-kubernetes-int-or-string: true
+                              type: string
                             type: object
                         type: object
                       securityContext:
@@ -3964,11 +3840,7 @@ spec:
                     type: object
                   type: array
                 memoryOffHeapMin:
-                  anyOf:
-                  - type: integer
-                  - type: string
-                  pattern: ^(\+|-)?(([0-9]+(\.[0-9]*)?)|(\.[0-9]+))(([KMGTPE]i)|[numkMGTPE]|([eE](\+|-)?(([0-9]+(\.[0-9]*)?)|(\.[0-9]+))))?$
-                  x-kubernetes-int-or-string: true
+                  type: string
                 memoryOffHeapRatio:
                   format: int32
                   type: integer
@@ -4003,19 +3875,11 @@ spec:
                   properties:
                     limits:
                       additionalProperties:
-                        anyOf:
-                        - type: integer
-                        - type: string
-                        pattern: ^(\+|-)?(([0-9]+(\.[0-9]*)?)|(\.[0-9]+))(([KMGTPE]i)|[numkMGTPE]|([eE](\+|-)?(([0-9]+(\.[0-9]*)?)|(\.[0-9]+))))?$
-                        x-kubernetes-int-or-string: true
+                        type: string
                       type: object
                     requests:
                       additionalProperties:
-                        anyOf:
-                        - type: integer
-                        - type: string
-                        pattern: ^(\+|-)?(([0-9]+(\.[0-9]*)?)|(\.[0-9]+))(([KMGTPE]i)|[numkMGTPE]|([eE](\+|-)?(([0-9]+(\.[0-9]*)?)|(\.[0-9]+))))?$
-                        x-kubernetes-int-or-string: true
+                        type: string
                       type: object
                   type: object
                 securityContext:
@@ -4116,11 +3980,7 @@ spec:
                                     containerName:
                                       type: string
                                     divisor:
-                                      anyOf:
-                                      - type: integer
-                                      - type: string
-                                      pattern: ^(\+|-)?(([0-9]+(\.[0-9]*)?)|(\.[0-9]+))(([KMGTPE]i)|[numkMGTPE]|([eE](\+|-)?(([0-9]+(\.[0-9]*)?)|(\.[0-9]+))))?$
-                                      x-kubernetes-int-or-string: true
+                                      type: string
                                     resource:
                                       type: string
                                   required:
@@ -4356,10 +4216,6 @@ spec:
                           - containerPort
                           type: object
                         type: array
-                        x-kubernetes-list-map-keys:
-                        - containerPort
-                        - protocol
-                        x-kubernetes-list-type: map
                       readinessProbe:
                         properties:
                           exec:
@@ -4429,19 +4285,11 @@ spec:
                         properties:
                           limits:
                             additionalProperties:
-                              anyOf:
-                              - type: integer
-                              - type: string
-                              pattern: ^(\+|-)?(([0-9]+(\.[0-9]*)?)|(\.[0-9]+))(([KMGTPE]i)|[numkMGTPE]|([eE](\+|-)?(([0-9]+(\.[0-9]*)?)|(\.[0-9]+))))?$
-                              x-kubernetes-int-or-string: true
+                              type: string
                             type: object
                           requests:
                             additionalProperties:
-                              anyOf:
-                              - type: integer
-                              - type: string
-                              pattern: ^(\+|-)?(([0-9]+(\.[0-9]*)?)|(\.[0-9]+))(([KMGTPE]i)|[numkMGTPE]|([eE](\+|-)?(([0-9]+(\.[0-9]*)?)|(\.[0-9]+))))?$
-                              x-kubernetes-int-or-string: true
+                              type: string
                             type: object
                         type: object
                       securityContext:
@@ -4654,19 +4502,11 @@ spec:
                             properties:
                               limits:
                                 additionalProperties:
-                                  anyOf:
-                                  - type: integer
-                                  - type: string
-                                  pattern: ^(\+|-)?(([0-9]+(\.[0-9]*)?)|(\.[0-9]+))(([KMGTPE]i)|[numkMGTPE]|([eE](\+|-)?(([0-9]+(\.[0-9]*)?)|(\.[0-9]+))))?$
-                                  x-kubernetes-int-or-string: true
+                                  type: string
                                 type: object
                               requests:
                                 additionalProperties:
-                                  anyOf:
-                                  - type: integer
-                                  - type: string
-                                  pattern: ^(\+|-)?(([0-9]+(\.[0-9]*)?)|(\.[0-9]+))(([KMGTPE]i)|[numkMGTPE]|([eE](\+|-)?(([0-9]+(\.[0-9]*)?)|(\.[0-9]+))))?$
-                                  x-kubernetes-int-or-string: true
+                                  type: string
                                 type: object
                             type: object
                           selector:
@@ -4707,11 +4547,7 @@ spec:
                             type: array
                           capacity:
                             additionalProperties:
-                              anyOf:
-                              - type: integer
-                              - type: string
-                              pattern: ^(\+|-)?(([0-9]+(\.[0-9]*)?)|(\.[0-9]+))(([KMGTPE]i)|[numkMGTPE]|([eE](\+|-)?(([0-9]+(\.[0-9]*)?)|(\.[0-9]+))))?$
-                              x-kubernetes-int-or-string: true
+                              type: string
                             type: object
                           conditions:
                             items:
@@ -4917,11 +4753,7 @@ spec:
                                     containerName:
                                       type: string
                                     divisor:
-                                      anyOf:
-                                      - type: integer
-                                      - type: string
-                                      pattern: ^(\+|-)?(([0-9]+(\.[0-9]*)?)|(\.[0-9]+))(([KMGTPE]i)|[numkMGTPE]|([eE](\+|-)?(([0-9]+(\.[0-9]*)?)|(\.[0-9]+))))?$
-                                      x-kubernetes-int-or-string: true
+                                      type: string
                                     resource:
                                       type: string
                                   required:
@@ -4937,11 +4769,7 @@ spec:
                           medium:
                             type: string
                           sizeLimit:
-                            anyOf:
-                            - type: integer
-                            - type: string
-                            pattern: ^(\+|-)?(([0-9]+(\.[0-9]*)?)|(\.[0-9]+))(([KMGTPE]i)|[numkMGTPE]|([eE](\+|-)?(([0-9]+(\.[0-9]*)?)|(\.[0-9]+))))?$
-                            x-kubernetes-int-or-string: true
+                            type: string
                         type: object
                       fc:
                         properties:
@@ -5166,11 +4994,7 @@ spec:
                                               containerName:
                                                 type: string
                                               divisor:
-                                                anyOf:
-                                                - type: integer
-                                                - type: string
-                                                pattern: ^(\+|-)?(([0-9]+(\.[0-9]*)?)|(\.[0-9]+))(([KMGTPE]i)|[numkMGTPE]|([eE](\+|-)?(([0-9]+(\.[0-9]*)?)|(\.[0-9]+))))?$
-                                                x-kubernetes-int-or-string: true
+                                                type: string
                                               resource:
                                                 type: string
                                             required: