configurable container capabilities (#1336)

* configurable container capabilities

* revert change on TestTLS

* fix e2e test

* minor fix

charts/postgres-operator/crds/operatorconfigurations.yaml

@@ -130,6 +130,10 @@ spec:
               kubernetes:
                 type: object
                 properties:
+                  additional_pod_capabilities:
+                    type: array
+                    items:
+                      type: string
                   cluster_domain:
                     type: string
                     default: "cluster.local"

charts/postgres-operator/values-crd.yaml

@@ -59,6 +59,10 @@ configUsers:
   super_username: postgres
 
 configKubernetes:
+  # list of additional capabilities for postgres container
+  # additional_pod_capabilities:
+  # - "SYS_NICE"
+
   # default DNS domain of K8s cluster where operator is running
   cluster_domain: cluster.local
   # additional labels assigned to the cluster objects

charts/postgres-operator/values.yaml

@@ -61,6 +61,9 @@ configUsers:
   super_username: postgres
 
 configKubernetes:
+  # list of additional capabilities for postgres container
+  # additional_pod_capabilities: "SYS_NICE"
+
   # default DNS domain of K8s cluster where operator is running
   cluster_domain: cluster.local
   # additional labels assigned to the cluster objects