feat: manage grafana pgsql db

- add pgsql backend capabilities for grafana
- create/manage pgsql database for grafana
- fix psql_is_slave fact to work on all current patroni clusters
- fix extra } in resources
- fix unless in psql grant commands
- fix add database owner
- fix disabled schema permissions, the unless didnt work

site/profiles/manifests/sql/postgres/db.pp

@@ -1,9 +1,9 @@
 define profiles::sql::postgres::db (
   String $dbname,
+  String $owner,
 ) {
   postgresql_psql { "create_database_${dbname}":
-    command => "CREATE DATABASE \"${dbname}\"",
+    command => "CREATE DATABASE \"${dbname}\" OWNER \"${owner}\"",
     unless  => "SELECT 1 FROM pg_database WHERE datname = '${dbname}'",
   }
 }
-

site/profiles/manifests/sql/postgres/grant.pp

@@ -1,11 +1,10 @@
 define profiles::sql::postgres::grant (
   String $username,
+  String $privilege,
   Enum['SCHEMA', 'DATABASE'] $type = 'DATABASE',
   Optional[String] $dbname = undef,
   Optional[String] $schema = undef,
-  String $privilege = 'ALL PRIVILEGES',
 ) {
-  # Validate parameters based on type
   if $type == 'DATABASE' and $dbname == undef {
     fail('The dbname parameter must be provided when type is DATABASE')
   }
@@ -14,25 +13,19 @@ define profiles::sql::postgres::grant (
     fail('Both dbname and schema parameters must be provided when type is SCHEMA')
   }
 
-  # Determine the appropriate SQL command and unless condition
   $command = $type ? {
     'DATABASE' => "GRANT ${privilege} ON DATABASE ${dbname} TO ${username}",
     'SCHEMA'   => "GRANT ${privilege} ON SCHEMA ${schema} TO ${username}",
   }
 
   $unless = $type ? {
-    'DATABASE' => "SELECT 1 FROM pg_roles r WHERE r.rolname='${username}' AND has_database_privilege('${username}', '${dbname}', 'CONNECT')", # lint:ignore:140chars
-    'SCHEMA'   => "SELECT 1 FROM pg_namespace n JOIN pg_roles r ON r.oid = n.nspowner WHERE nspname = '${schema}' AND r.rolname = '${username}'", # lint:ignore:140chars
-  }
-  # Ensure the db parameter is set correctly when type is SCHEMA
-  $effective_dbname = $type ? {
-    'SCHEMA'   => $dbname,
-    'DATABASE' => $dbname,
+    'DATABASE' => "SELECT 1 FROM pg_roles r WHERE r.rolname='${username}' AND has_database_privilege('${username}', '${dbname}', '${privilege}')", # lint:ignore:140chars
+    'SCHEMA'   => undef,
   }
 
-  postgresql_psql { "grant_${privilege}_on_${type}_${effective_dbname}_${schema}_to_${username}":
+  postgresql_psql { "grant_${privilege}_on_${type}_${dbname}_${schema}_to_${username}":
     command => $command,
     unless  => $unless,
-    db      => $effective_dbname,
+    db      => $dbname,
   }
 }