docker: add ability to configure custom network

Signed-off-by: Jakub Sokołowski <jakub@status.im>

defaults/main.yml

@@ -1,4 +1,4 @@
----
+
 postgres_ha_service_name: 'postgres-ha'
 postgres_ha_service_path: '/docker/{{ postgres_ha_service_name }}'
 postgres_ha_compose_file: '{{ postgres_ha_service_path }}/docker-compose.yml'
@@ -8,6 +8,7 @@ postgres_ha_cont_data_vol: '{{ postgres_ha_service_path }}/data'
 postgres_ha_cont_init_vol: '{{ postgres_ha_service_path }}/init'
 postgres_ha_cont_backup_vol: '{{ postgres_ha_service_path }}/backup'
 postgres_ha_cont_image: 'postgres:15.1-alpine'
+postgres_ha_cont_networks: []
 postgres_ha_cont_port: 5432
 postgres_ha_cont_uid: 70
 postgres_ha_host_uid: '{{ 100000 + postgres_ha_cont_uid | int }}'

templates/docker-compose.yml.j2

@@ -14,6 +14,9 @@ services:
 {% endif %}
       # This fixes chmod errors on DB startup due to volume + userns-remap
       PGDATA: '/var/lib/postgresql/data/pgdata'
+{% if postgres_ha_cont_networks %}
+    networks: {{ postgres_ha_cont_networks | to_json }}
+{% endif %}
     ports:
       - '{{ postgres_ha_cont_port }}:{{ postgres_ha_cont_port }}'
     tmpfs:
@@ -33,3 +36,11 @@ services:
         '-p', '{{ postgres_ha_cont_port }}',
         '-U', '{{ postgres_ha_admin_user }}'
       ]
+
+{% if postgres_ha_cont_networks != [] %}
+networks:
+{% for network in postgres_ha_cont_networks %}
+  {{ network }}:
+    external: true
+{% endfor %}
+{% endif %}