1 reply

Override ENV variables inside Docker Compose

Hey, I have those ENV variables for my docker compose config. There's one problem, inside docker I have to specific

DB_HOST

DB_HOST

{container_name}, so I've tried to override it.

DB_HOST=localhost
DB_USER=
DB_PASSWORD=
DB_NAME=
DB_PORT=

DATABASE_URL=mysql://${DB_USER}:${DB_PASSWORD}@${DB_HOST}:${DB_PORT}/${DB_NAME}

DB_HOST=localhost
DB_USER=
DB_PASSWORD=
DB_NAME=
DB_PORT=

DATABASE_URL=mysql://${DB_USER}:${DB_PASSWORD}@${DB_HOST}:${DB_PORT}/${DB_NAME}

env_file:
  - .env
environment:
  DB_HOST: mysql # Rewrite the `localhost` host, but this won't override the `DATABASE_URL` ENV

env_file:
  - .env
environment:
  DB_HOST: mysql # Rewrite the `localhost` host, but this won't override the `DATABASE_URL` ENV

1 reply

Hey, I have those ENV variables for my docker compose config. There's one problem, inside docker I have to specific

DB_HOST

DB_HOST

{container_name}, so I've tried to override it.

DB_HOST=localhost
DB_USER=
DB_PASSWORD=
DB_NAME=
DB_PORT=

DATABASE_URL=mysql://${DB_USER}:${DB_PASSWORD}@${DB_HOST}:${DB_PORT}/${DB_NAME}

DB_HOST=localhost
DB_USER=
DB_PASSWORD=
DB_NAME=
DB_PORT=

DATABASE_URL=mysql://${DB_USER}:${DB_PASSWORD}@${DB_HOST}:${DB_PORT}/${DB_NAME}

env_file:
  - .env
environment:
  DB_HOST: mysql # Rewrite the `localhost` host, but this won't override the `DATABASE_URL` ENV

env_file:
  - .env
environment:
  DB_HOST: mysql # Rewrite the `localhost` host, but this won't override the `DATABASE_URL` ENV