Add ability to configure extra args for postgres

* add default extra args postgres

* add postgres_extra_args option to readme

README.md

@@ -422,6 +422,9 @@ spec:
     limits:
       storage: 50Gi
   postgres_storage_class: fast-ssd
+  postgres_extra_args:
+    - '-c'
+    - 'max_connections=1000'
 ```
 
 **Note**: If `postgres_storage_class` is not defined, Postgres will store it's data on a volume using the default storage class for your cluster.

config/crd/bases/awx.ansible.com_awxs.yaml

@@ -362,6 +362,10 @@ spec:
                 postgres_data_path:
                   description: Path where the PostgreSQL data are located
                   type: string
+                postgres_extra_args:
+                  type: array
+                  items:
+                    type: string
                 ca_trust_bundle:
                   description: Path where the trusted CA bundle is available
                   type: string

roles/installer/templates/postgres.yaml.j2

@@ -41,6 +41,9 @@ spec:
         - image: '{{ _postgres_image }}'
           imagePullPolicy: '{{ image_pull_policy }}'
           name: postgres
+{% if postgres_extra_args %}
+          args: {{ postgres_extra_args }}
+{% endif %}
           env:
             # For postgres_image based on rhel8/postgresql-12
             - name: POSTGRESQL_DATABASE