Add Docker network configuration for pgadmin role (#304)

Signed-off-by: Jim Enright <[email protected]>

Author: jimright

roles/pgadmin/README.md

@@ -38,6 +38,8 @@ The role will:
 | `pgadmin_default_email` | `str` | `False` | `[email protected]` | Email account for the default user to access the pgAdmin web UI. This user is created on first launch of the container. |
 | `pgadmin_default_password` | `str` | `False` | `pgadmin` | Password for the default user to access the pgAdmin web UI. **It is highly recommended to change this default password for production environments.** |
 | `pgadmin_docker_exe` | `str` | `False` | `/usr/bin/docker` | The full path to the Docker executable on the target host. |
+| `pgadmin_docker_network_subnet_cidr` | `str` | `False` | `172.21.0.0/16` | Subnet CIDR for the Docker bridge network used by pgadmin. |
+| `pgadmin_docker_network_subnet_gateway` | `str` | `False` | `172.21.0.1` | Gateway for the Docker bridge network subnet used by pgadmin. |
 
 # Example Playbook
 

roles/pgadmin/defaults/main.yml

@@ -38,3 +38,6 @@ pgadmin_default_email: "[email protected]"
 pgadmin_default_password: "pgadmin"
 
 pgadmin_docker_exe: /usr/bin/docker
+
+pgadmin_docker_network_subnet_cidr: 172.21.0.0/16
+pgadmin_docker_network_subnet_gateway: 172.21.0.1

roles/pgadmin/meta/argument_specs.yml

@@ -81,3 +81,13 @@ argument_specs:
         type: str
         required: false
         default: "/usr/bin/docker"
+      pgadmin_docker_network_subnet_cidr:
+        description: Subnet CIDR for the Docker bridge network used by pgadmin.
+        type: str
+        required: false
+        default: "172.21.0.0/16"
+      pgadmin_docker_network_subnet_gateway:
+        description: Gateway for the Docker bridge network subnet used by pgadmin.
+        type: str
+        required: false
+        default: "172.21.0.1"

roles/pgadmin/templates/pgadmin-docker-compose.yml.j2

@@ -3,6 +3,8 @@ services:
     image: dpage/pgadmin4:latest
     container_name: pgadmin4_container
     restart: always
+    networks:
+      - pg_network
     ports:
       - "{{ pgadmin_port }}:80"
     entrypoint: /bin/sh -c "chmod 600 /pgpass; /entrypoint.sh;"
@@ -19,3 +21,11 @@ services:
 
 volumes:
   pgadmin-data:
+
+networks:
+  pg_network:
+    driver: bridge
+    ipam:
+      config:
+        - subnet: {{ pgadmin_docker_network_subnet_cidr }}
+          gateway: {{ pgadmin_docker_network_subnet_gateway }}