Add netbox_database_maintenance variable

README.adoc

@@ -167,6 +167,13 @@ To configure Netbox to keep database connections open longer than a single reque
 set `netbox_database_conn_age` to your preferred maximum connection age, in seconds.
 300 seconds (5 minutes) is typically a good number to start with.
 
+[source,yaml]
+----
+netbox_database_maintenance: postgres
+----
+
+If the postgres database is configured to only allow access to specific tables of the DB for the user configured with Netbox, you can set `netbox_database_maintenance` to replace the default database used for connection checking to a different table than the default `postgres`. This is an empty table in every postgres database by default, but some configurations might block access to this table, so a different table (i.e. `netbox_prod`) can be used here instead.
+
 [source,yaml]
 ----
 # Example usage, default is empty dict
@@ -501,6 +508,7 @@ installing NetBox on to authenticate with it over TCP:
     netbox_database: netbox_prod
     netbox_database_user: netbox_prod_user
     netbox_database_password: "very_secure_password_for_prod"
+    netbox_database_maintenance: netbox_prod
     redis_bind: 127.0.0.1
     redis_version: 6.0.9
     redis_checksum: sha256:dc2bdcf81c620e9f09cfd12e85d3bc631c897b2db7a55218fd8a65eaa37f86dd

defaults/main.yml

@@ -24,6 +24,7 @@ netbox_database_port: 5432
 # netbox_database_socket: /var/run/postgresql
 netbox_database_conn_age: 0
 netbox_database_options: {}
+netbox_database_maintenance: "postgres"
 
 netbox_redis_host: 127.0.0.1
 netbox_redis_sentinels: []

tasks/main.yml

@@ -46,6 +46,7 @@
     name: "{{ netbox_database }}"
     login_user: "{{ netbox_database_user }}"
     login_unix_socket: "{{ netbox_database_socket }}"
+    maintenance_db: "{{ netbox_database_maintenance }}"
   become: true
   become_user: "{{ netbox_database_user }}"
   when:
@@ -59,6 +60,7 @@
     port: "{{ netbox_database_port }}"
     login_user: "{{ netbox_database_user }}"
     login_password: "{{ netbox_database_password }}"
+    maintenance_db: "{{ netbox_database_maintenance }}"
   when:
     - netbox_database_socket is not defined
     - netbox_database_host is defined