Fix the volume definition, add placement constraints to the postgresql image

defaults/main.yml

@@ -13,4 +13,5 @@ open_asfa_db_image: 'postgres:12-alpine'
 #open_asfa_db_pwd: 'set it in a vault file'
 open_asfa_db_name: 'asfadb'
 open_asfa_db_user: 'asfadb_user'
-open_asfa_db_volume: 'asfa_pg_data'
+open_asfa_db_volume: 'asfa_pg_data'
+open_asfa_db_constraints: '[node.labels.pg_data==asfa_server]'

templates/open-asfa-docker-compose.yml.j2

@@ -58,9 +58,19 @@ services:
       POSTGRES_USER: postgres
       POSTGRES_PORT: 5432
       PGDATA: /var/lib/postgresql/data/pg_data
+    deploy:
+      placement:
+        constraints: {{ open_asfa_db_constraints }}
+      restart_policy:
+        condition: always
+        delay: 5s
+        max_attempts: 3
+        window: 120s
+    logging:
+      driver: 'journald'
 
 networks:
   {{ open_asfa_docker_network }}:
 
 volumes:
-  - {{ open_asfa_db_volume }}:
+  {{ open_asfa_db_volume }}: