How to share enviroment variables in docker - docker

Question

I´m new to docker and I´m having lots of troubles to make it start. I´m making an asp.net core 1.0.1 application user docker container tools for visual studio 2017. I have the following env.file in the same root as the compose file with this values:
REDIS_PORT=6379
and this docker compose yml:
version: '2'
services:
haproxy:
image: eeacms/haproxy
links:
- webapplication3
ports:
- "80:80"
webapplication3:
image: webapplication3
enviroment:
- REDIS_PORT=${REDIS_PORT}
build:
context: .
dockerfile: Dockerfile
links:
- redis
ports:
- "80"
redis:
image: redis
ports:
- ${REDIS_PORT}
I want to know the redis port I have to connect to from my Asp.net core app. As far as I know, the only way to do it is using env variables, and since I don´t want to copy paste the port everywhere I´d like to use the .env file style. Anyway this is not working saying:
Unsupported config option for services.webapplication3:'enviroment'
Any ideas what the problem could be?

Answer 1

You missed a letter "n" in a word environment.

Answer 2

You need to pass the env_file option:
version: '2'
services:
haproxy:
image: eeacms/haproxy
links:
- webapplication3
ports:
- "80:80"
webapplication3:
image: webapplication3
env_file:
- env.file
environment:
- REDIS_PORT=${REDIS_PORT}
build:
context: .
dockerfile: Dockerfile
links:
- redis
ports:
- "80"
redis:
image: redis
env_file:
- env.file
ports:
- ${REDIS_PORT}
Take a look at https://docs.docker.com/compose/environment-variables/ for more info.