Set environment variable with same value but different name

[dixiedream]

Hi Bret!

It's possible to set 2 env var with the same value but different name?

example:

MONGO_CONNECTION=mongodb://db:27017/test
DB_URI=${MONGO_CONNECTION}

Thanks!

By the way! Your docker nodejs course is AWESOME!

[BretFisher]

👋
Thanks for the thanks!

Where are you talking about putting these ENV's? A Dockerfile, docker-compose file, Swarm Stack, or?

[dixiedream]

Where are you talking about putting these ENV's? A Dockerfile, docker-compose file, Swarm Stack, or?

My typical use case is to place the vars in a .env file for local development then use those with env_file property in the compose file and in a production environment using Swarm secrets.

[BretFisher]

Only docker-compose cli supports .env files. You'd need to export those manually to shell before Swarm stack deploy would pick them up.