Add postgresql option target_session_attrs

.helm/starter/templates/postgres-config.yaml

@@ -12,6 +12,7 @@ stringData:
   username: {{ .username }}
   password: {{ .password }}
   sslmode: {{ .sslmode }}
+  target_session_attrs: {{ .target_session_attrs | default "any" }}
   type: {{ .type }}
 type: Opaque
 {{- end }}

docs/user-guide/database-configuration.md

@@ -27,6 +27,7 @@ stringData:
   username: <username to connect as>
   password: <password to connect with>
   sslmode: prefer
+  target_session_attrs: read-write
   type: unmanaged
 type: Opaque
 ```
@@ -37,6 +38,8 @@ type: Opaque
 
 **Note**: The variable `sslmode` is valid for `external` databases only. The allowed values are: `prefer`, `disable`, `allow`, `require`, `verify-ca`, `verify-full`.
 
+**Note**: The variable `target_session_attrs` is only useful for `clustered external` databases. The allowed values are: `any` (default), `read-write`, `read-only`, `primary`, `standby` and `prefer-standby`, whereby only `read-write` and `primary` really make sense in AWX use, as you want to connect to a database node that offers write support.
+
 Once the secret is created, you can specify it on your spec:
 
 ```yaml

roles/installer/tasks/database_configuration.yml

@@ -100,6 +100,7 @@
     awx_postgres_port: "{{ pg_config['resources'][0]['data']['port'] | b64decode }}"
     awx_postgres_host: "{{ pg_config['resources'][0]['data']['host'] | b64decode }}"
     awx_postgres_sslmode: "{{ pg_config['resources'][0]['data']['sslmode'] |  default('prefer'|b64encode) | b64decode }}"
+    awx_postgres_target_session_attrs: "{{ pg_config['resources'][0]['data']['target_session_attrs'] | default('') | b64decode }}"
   no_log: "{{ no_log }}"
 
 - name: Set database as managed

roles/installer/templates/settings/credentials.py.j2

@@ -10,6 +10,9 @@ DATABASES = {
         'OPTIONS': { 'sslmode': '{{ awx_postgres_sslmode }}',
 {% if awx_postgres_sslmode in ['verify-ca', 'verify-full'] %}
                      'sslrootcert': '{{ ca_trust_bundle }}',
+{% endif %}
+{% if awx_postgres_target_session_attrs %}
+                     'target_session_attrs': '{{ awx_postgres_target_session_attrs }}',
 {% endif %}
         },
     }
@@ -25,6 +28,9 @@ LISTENER_DATABASES = {
             'keepalives_count': {{ postgres_keepalives_count }},
 {% else %}
             'keepalives': 0,
+{% endif %}
+{% if awx_postgres_target_session_attrs %}
+            'target_session_attrs': '{{ awx_postgres_target_session_attrs }}',
 {% endif %}
         },
     }