Creating docker containers for dev and prod with multiple postgres databases - postgresql

Question

I'm trying to create 2 docker containers one for dev and one for prod using docker-compose. The two containers should be linked to separate postgres databases.
I tried the following, but it seems to create just one container and one database everytime.
docker-compose.yml
version: "3"
services:
db:
image: postgres:latest
restart: always
container_name: myinstance-postgres-database
environment:
- POSTGRES_USER= dbuser
- POSTGRES_PASSWORD= dbpass
- POSTGRES_DB= ProductionDB
ports:
- 127.17.0.1:5432:5432
volumes:
- myinstance-postgres-db:/var/lib/postgresql/data
app:
image: service/platform:latest
restart: always
container_name: prod-app
environment:
DB_SETUP: "true"
DB_VENDOR: "postgresql"
DB_HOST: db
DB_USER: "dbuser"
DB_PASSWORD: "dbpass"
DB_NAME: "ProductionDB"
DB_WAIT: 10
ports:
- 8443:8443
volumes:
- myinstance-postgres-git:/usr/local/tomcat/webapps/ROOT/WEB-INF/git
depends_on:
- db
volumes:
myinstance-postgres-db:
myinstance-postgres-git:
docker-compose.dev.yml
version: "3"
services:
db:
image: postgres:latest
restart: always
container_name: myinstancedev-postgres-database
environment:
- POSTGRES_USER= dbuser
- POSTGRES_PASSWORD= dbpass
- POSTGRES_DB= DevDB
ports:
- 127.17.0.1:5432:5432
volumes:
- myinstancedev-postgres-db:/var/lib/postgresql/data
app:
image: service/platform:latest
restart: always
container_name: dev-app
environment:
DB_SETUP: "true"
DB_VENDOR: "postgresql"
DB_HOST: db
DB_USER: "dbuser"
DB_PASSWORD: "dbpass"
DB_NAME: "DevDB"
DB_WAIT: 10
ports:
- 8444:8443
volumes:
- myinstancedev-postgres-git:/usr/local/tomcat/webapps/ROOT/WEB-INF/git
depends_on:
- db
volumes:
myinstancedev-postgres-db:
myinstancedev-postgres-git:
Then I run :
sudo docker-compose -f docker-compose.yml -f docker-compose.dev.yml up -d
as a result I have one container which is dev-app and only one database is created.
Any solution ?

Answer 1

If you want to run both of them together use
sudo docker-compose -f docker-compose.yml -p prod up -d && sudo docker-compose -f docker-compose.dev.yml -p dev up -d
When you pass multiple files in the same docker-compose command, it does not create separate containers as you'd like. It instead merges them. Check Share Compose configurations between files and projects
Also note, you may have PORT conflict errors in the host. Because in both the compose files you are exposing the same ports 5432 and 8443
My output with 2 alpine postgres images on different ports.
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
74a8e5a8fad0 postgres:alpine "docker-entrypoint.s…" 1 second ago Up Less than a second 0.0.0.0:5430->5432/tcp prod_web_1
23f2b995d499 postgres:alpine "docker-entrypoint.s…" 2 seconds ago Up 2 seconds 0.0.0.0:5431->5432/tcp dev_web_1
Also, do consider using env files for compose.