Make installing the webhook configurable

README.md

@@ -15,7 +15,7 @@ kubectl -n cass-operator create -f https://raw.githubusercontent.com/datastax/ca
 
 ### Loading the operator
 
-Installing the Cass Operator itself is straightforward. We have provided manifests for each Kubernetes version from 1.13 through 1.17. Apply the relevant manifest to your cluster as follows:
+Installing the Cass Operator itself is straightforward. We have provided manifests for each Kubernetes version from 1.15 through 1.19. Apply the relevant manifest to your cluster as follows:
 
 ```console
 K8S_VER=v1.16
@@ -313,7 +313,7 @@ spec:
 
 ## Requirements
 
-- Kubernetes cluster, 1.13 or newer.
+- Kubernetes cluster, 1.15 or newer.
 
 ## Contributing
 

charts/cass-operator-chart/templates/customresourcedefinition.yaml → charts/cass-operator-chart/crds/customresourcedefinition.yaml

@@ -1378,14 +1378,6 @@ spec:
                               - containerPort
                               type: object
                             type: array
-                            {{- if semverCompare ">= 1.16-0" .Capabilities.KubeVersion.GitVersion }}
-                            x-kubernetes-list-map-keys:
-                            - containerPort
-                            {{- if semverCompare "< 1.18-0" .Capabilities.KubeVersion.GitVersion }}
-                            - protocol
-                            {{- end }}
-                            x-kubernetes-list-type: map
-                            {{- end }}
                           readinessProbe:
                             description: 'Periodic probe of container service readiness.
                               Container will be removed from service endpoints if
@@ -3714,14 +3706,6 @@ spec:
                               - containerPort
                               type: object
                             type: array
-                            {{- if semverCompare ">= 1.16-0" .Capabilities.KubeVersion.GitVersion }}
-                            x-kubernetes-list-map-keys:
-                            - containerPort
-                            {{- if semverCompare "< 1.18-0" .Capabilities.KubeVersion.GitVersion }}
-                            - protocol
-                            {{- end }}
-                            x-kubernetes-list-type: map
-                            {{- end }}
                           readinessProbe:
                             description: 'Periodic probe of container service readiness.
                               Container will be removed from service endpoints if
@@ -4652,12 +4636,6 @@ spec:
                         - whenUnsatisfiable
                         type: object
                       type: array
-                      {{- if semverCompare ">= 1.16-0" .Capabilities.KubeVersion.GitVersion }}
-                      x-kubernetes-list-map-keys:
-                      - topologyKey
-                      - whenUnsatisfiable
-                      x-kubernetes-list-type: map
-                      {{- end }}
                     volumes:
                       description: 'List of volumes that can be mounted by containers
                         belonging to the pod. More info: https://kubernetes.io/docs/concepts/storage/volumes'
@@ -6302,9 +6280,7 @@ spec:
               type: string
           type: object
       type: object
-      {{- if semverCompare ">= 1.15-0" .Capabilities.KubeVersion.GitVersion }}
       x-kubernetes-preserve-unknown-fields: true
-      {{- end }}
   version: v1beta1
   versions:
   - name: v1beta1

charts/cass-operator-chart/templates/validatingwebhookconfiguration.yaml

@@ -1,3 +1,4 @@
+{{- if .Values.webhook.enabled }}
 apiVersion: admissionregistration.k8s.io/v1beta1
 kind: ValidatingWebhookConfiguration
 metadata:
@@ -26,3 +27,4 @@ webhooks:
   matchPolicy: "Equivalent"
   {{- end }}
   sideEffects: None
+  {{- end}}

charts/cass-operator-chart/templates/webhook-cr.yaml

@@ -1,3 +1,4 @@
+{{- if .Values.webhook.enabled }}
 apiVersion: rbac.authorization.k8s.io/v1
 kind: ClusterRole
 metadata:
@@ -14,3 +15,4 @@ rules:
   - update
   resourceNames:
   - "cassandradatacenter-webhook-registration"
+  {{- end}}

charts/cass-operator-chart/templates/webhook-crb.yaml

@@ -1,3 +1,4 @@
+{{- if .Values.webhook.enabled }}
 kind: ClusterRoleBinding
 apiVersion: rbac.authorization.k8s.io/v1
 metadata:
@@ -10,3 +11,4 @@ roleRef:
   kind: ClusterRole
   name: {{ .Values.webhookClusterRoleName }}
   apiGroup: rbac.authorization.k8s.io
+  {{- end}}

charts/cass-operator-chart/templates/webhook-secret.yaml

@@ -1,7 +1,9 @@
+{{- if .Values.webhook.enabled }}
 apiVersion: v1
 kind: Secret
 metadata:
   name: cass-operator-webhook-config
 data:
   tls.crt: ""
   tls.key: ""
+  {{- end}}

charts/cass-operator-chart/templates/webhook-service.yaml

@@ -1,3 +1,4 @@
+{{- if .Values.webhook.enabled }}
 apiVersion: v1
 kind: Service
 metadata:
@@ -10,3 +11,4 @@ spec:
     targetPort: 8443
   selector:
     name: cass-operator
+  {{- end}}

charts/cass-operator-chart/values.yaml

@@ -12,3 +12,6 @@ deploymentReplicas: 1
 defaultImage: "datastax/cass-operator:1.4.1"
 imagePullPolicy: IfNotPresent
 imagePullSecret: ""
+
+webhook:
+  enabled: true

docs/user/README.md

@@ -7,10 +7,8 @@ and managing Cassandra or DSE in a Kubernetes cluster.
 
 ## Prerequisites
 
-1. A Kubernetes cluster. Kubernetes v1.15 is recommended, but Kubernetes
-   v1.13 has been tested and works provided the line containing
-   `x-kubernetes-preserve-unknown-fields: true` is deleted from
-   `cass-operator-manifests.yaml`.
+1. A Kubernetes cluster. Kubernetes v1.18 is recommended, but Kubernetes
+   v1.15 has been tested.
 2. The ability to download images from Docker Hub from within the Kubernetes
    cluster.