Cleanup configuration

Add pool configuration into CRD & charts. Add preliminary documentation.
Rename NumberOfInstances to Replicas like in Deployment. Mention couple
of potential improvement points for connection pool specification.

charts/postgres-operator/crds/operatorconfigurations.yaml

@@ -321,6 +321,24 @@ spec:
             connection_pool:
               type: object
               properties:
+                connection_pool_schema:
+                  type: string
+                  #default: "pooler"
+                connection_pool_user:
+                  type: string
+                  #default: "pooler"
+                connection_pool_instances_number:
+                  type: integer
+                  #default: 1
+                connection_pool_image:
+                  type: string
+                  #default: "registry.opensource.zalan.do/acid/pgbouncer:1.0.0"
+                connection_pool_mode:
+                  type: string
+                  enum:
+                    - "session"
+                    - "transaction"
+                  #default: "transaction"
                 connection_pool_default_cpu_limit:
                   type: string
                   pattern: '^(\d+m|\d+(\.\d{1,3})?)$'
@@ -336,25 +354,7 @@ spec:
                 connection_pool_default_memory_request:
                   type: string
                   pattern: '^(\d+(e\d+)?|\d+(\.\d+)?(e\d+)?[EPTGMK]i?)$'
-                  #default: "100Mi"
-                connection_pool_image:
-                  type: string
-                  #default: "pierone.stups.zalan.do/acid/pgbouncer:0.0.1"
-                connection_pool_instances_number:
-                  type: integer
-                  #default: 1
-                connection_pool_mode:
-                  type: string
-                  enum:
-                    - "session"
-                    - "transaction"
-                  #default: "transaction"
-                connection_pool_schema:
-                  type: string
-                  #default: "pooler"
-                connection_pool_user:
-                  type: string
-                  #default: "pooler"
+                  #default: "100m"
         status:
           type: object
           additionalProperties:

charts/postgres-operator/crds/postgresqls.yaml

@@ -242,6 +242,22 @@ spec:
                     type: string
             replicaLoadBalancer:  # deprecated
               type: boolean
+            connectionPool:
+              type: object
+              properties:
+                schema:
+                  type: string
+                user:
+                  type: string
+                replicas:
+                  type: integer
+                dockerImage:
+                  type: string
+                mode:
+                  type: string
+                  enum:
+                    - "session"
+                    - "transaction"
             resources:
               type: object
               required:

charts/postgres-operator/values-crd.yaml

@@ -262,15 +262,21 @@ configScalyr:
   scalyr_memory_request: 50Mi
 
 configConnectionPool:
-    connection_pool_default_cpu_limit: "1"
-    connection_pool_default_cpu_request: "1"
-    connection_pool_default_memory_limit: 100m
-    connection_pool_default_memory_request: "100Mi"
-    # connection_pool_image: ""
-    connection_pool_instances_number: 1
-    connection_pool_mode: "transaction"
-    # connection_pool_schema: "pooler"
-    # connection_pool_user: "pooler"
+  # number of pooler instances
+  connection_pool_replicas: 1
+  # db schema to install lookup function into
+  connection_pool_schema: "pooler"
+  # db user for pooler to use
+  connection_pool_user: "pooler"
+  # docker image
+  connection_pool_image: "registry.opensource.zalan.do/acid/pgbouncer"
+  # default pooling mode
+  connection_pool_mode: "transaction"
+  # default resources
+  connection_pool_default_cpu_request: "100m"
+  connection_pool_default_memory_request: "100M"
+  connection_pool_default_cpu_limit: "100m"
+  connection_pool_default_memory_limit: "100M"
 
 rbac:
   # Specifies whether RBAC resources should be created

charts/postgres-operator/values.yaml

@@ -239,15 +239,21 @@ configTeamsApi:
 
 # configure connection pooler deployment created by the operator
 configConnectionPool:
-  connection_pool_default_cpu_limit: "1"
-  connection_pool_default_cpu_request: "1"
-  connection_pool_default_memory_limit: 100m
-  connection_pool_default_memory_request: "100Mi"
-  # connection_pool_image: ""
-  connection_pool_instances_number: 1
+  # number of pooler instances
+  connection_pool_replicas: 1
+  # db schema to install lookup function into
+  connection_pool_schema: "pooler"
+  # db user for pooler to use
+  connection_pool_user: "pooler"
+  # docker image
+  connection_pool_image: "registry.opensource.zalan.do/acid/pgbouncer"
+  # default pooling mode
   connection_pool_mode: "transaction"
-  # connection_pool_schema: "pooler"
-  # connection_pool_user: "pooler"
+  # default resources
+  connection_pool_default_cpu_request: "100m"
+  connection_pool_default_memory_request: "100M"
+  connection_pool_default_cpu_limit: "100m"
+  connection_pool_default_memory_limit: "100M"
 
 rbac:
   # Specifies whether RBAC resources should be created