What do Corn Flakes, Popsicles and Post-It Notes have in common? That’s right, they were created by accident, as a by-product of other forms of experimentation. By chance recently, I found out that we can pass the environment variables to the docker-compose.yml configuration from the .env (aka DotEnv) file located in the same directory.
Why is this important, and how does it work?
Let’s say that there is a database connection string in your project’s configuration:
DB_URL = os.environ.get('DB_URL')
So, it is taken from an environment variable DB_URL
If we use Docker for work (and we do, because we are pros, ha), then we know that environment variables can be set in the docker-compose.yml file.It looks something like this:
DB_URL: and here is the connection string
However, if there are a lot of people in the team and someone wanted to play with the DB, then it can be a bit inconvenient as synchronization problems such as Git conflicts and misunderstandings can occur.
In this case, it is comfortable to initialize environment variables from a .env (DotEnv) file, solely yours and not in the git.
Just create a new .env file in the same folder as docker-compose.yml and enter:
Then, in docker-compose.yml you write this:
It’s that simple, smart Docker will subsequently pull everything up out of the box.
To view the compiled configuration use the command `docker-compose config` which prints your resolved application configuration to the terminal:
$ docker-compose config
If you’re using Docker Compose, tips like this can save you time and money. At Edicasoft, our knowledgeable and motivated team can help you to give your project a boost, or provide much needed direction if you’re unsure of which step to take. For any queries don’t hesitate to get in touch!
Most of the startups try to be like a swiss knife. It means, that they want to implement as many features as possible in their product.
While the covid-19 affecting a different kind of businesses, Edicasoft continue working in the usual mode, as we are working remotely since founding at 2017.
Most outsourcing IT companies don't have enough qualifications to work with startups, so usually, they don't give the quality value of the product and after the development, most part of MVP is just a cr*p that needs to be rewritten by the in-house team