Linking two docker compose configuration fails with a bridge network - docker

Question

I have setup a global docker configuration which i expect to handle nginx,and database configuration. This has the following configuration
webserver:
image: nginx
container_name: webserver
restart: unless-stopped
tty: true
ports:
- "80:80"
- "443:443"
volumes:
- ./:/var/www
- ./dockerconfig/nginx/conf.d/:/etc/nginx/conf.d/
networks:
- common
networks:
common:
driver: bridge
on the folder dockerconfig/nginx/conf.d i have a file pos.test with the following nginx config
server {
listen 80;
server_name pos.test www.pos.test;
index index.php index.html;
error_log /var/log/nginx/error.log;
access_log /var/log/nginx/access.log;
root /var/www/web;
location ~ \.php$ {
try_files $uri =404;
fastcgi_split_path_info ^(.+\.php)(/.+)$;
fastcgi_pass app:9000;
fastcgi_index index.php;
include fastcgi_params;
fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
fastcgi_param PATH_INFO $fastcgi_path_info;
}
location / {
try_files $uri $uri/ /index.php?$query_string;
gzip_static on;
}
}
ON THE SECOND DOCKER configuration file i have
Now i have another docker configuration with the following
app:
build:
context: .
dockerfile: Dockerfile
image: posapp/php
container_name: envanto_pos
restart: unless-stopped
tty: true
working_dir: /var/www/pos
volumes:
- ./:/var/www/pos
networks:
- common
networks:
common:
driver: bridge
Now after running both docker files via docker-compose up -d they both run without any issue but now i nginx cannot run the domain pos.test where the app code is executed on the second docker file
The idea behind this is to have one docker-compose configuration file handle nginx server while the other configuration to copy files is handled by the other docker configuration files
How can i make both docker configurations work as including the network part with a bridge fails to work.What am i missing out.
UPDATE
I know one of the way to solve this would be to add a single docker config file but i want to split the docker config files to different configuration files

Answer 1

You are most likely running the docker-compose command from different directories, and not overriding the compose project name. Docker compose will prefix objects created, like containers, volumes, and networks, with the project name, to allow different instances to be run in isolation from each other.
To solve this, you need a known name of the network, and you'll want to define it as external to at least one of your compose files. When the network is defined as external, compose will not try to create it, but will require that it was already created externally, either by a docker network create command or by the other compose file.
To create the network with a known name, you can specify the name value in newer versions of the docker compose file.
Here is the first compose file that would create the network with a known name:
version: '3.7'
services:
webserver:
image: nginx
container_name: webserver
restart: unless-stopped
tty: true
ports:
- "80:80"
- "443:443"
volumes:
- ./:/var/www
- ./dockerconfig/nginx/conf.d/:/etc/nginx/conf.d/
networks:
- common
networks:
common:
external: false
name: common
And the second compose file that would use the already created network:
version: '3.7'
services:
app:
build:
context: .
dockerfile: Dockerfile
image: posapp/php
container_name: envanto_pos
restart: unless-stopped
tty: true
working_dir: /var/www/pos
volumes:
- ./:/var/www/pos
networks:
- common
networks:
common:
external: true
name: common

Answer 2

The problem is that you're redefining the common network.
You can define the 2 docker-compose.yml files as follow:
docker-compose.yml
networks:
common:
driver: bridge
services:
app:
build:
context: .
dockerfile: Dockerfile
image: posapp/php
container_name: envanto_pos
restart: unless-stopped
tty: true
working_dir: /var/www/pos
volumes:
- ./${AppPath}/:/var/www/pos
networks:
- common
and docker-compose.webserver.yml
services:
webserver:
image: nginx
container_name: webserver
restart: unless-stopped
tty: true
ports:
- "80:80"
- "443:443"
volumes:
- ./${WebserverPath}/:/var/www
- ./${WebserverPath}/dockerconfig/nginx/conf.d/:/etc/nginx/conf.d/
networks:
- common
and start the application with:
docker-compose -f docker-compose.yml -f docker-compose.webserver.yml up -d