Hello, I'm trying to understand how Docker Compose handles .env files. According to the documentation, I should be able to reference an env file from anywhere relative to my compose YAML file. My compose file is located in `workspace/docker/engines`, and I have the .env file somewhere else, specifically in my home directory. I can reference secret files using a `~/` path, but can I do the same for my .env? Just to add, I named the file 'file.env' and placed it in the same directory as my compose YAML, but that didn't seem to work either. However, when I use the `--env-file` option, it functions correctly regardless of the location. I also learned that utilizing the following in my compose setup works:
```
env_file:
- path: "../.env"
required: true
```
5 Answers
It’s tricky because you can't really reference a .env file from just anywhere unless you use `--env-file`. Also, it has to be named `.env`; otherwise, you have to use `--env-file`. So, keeping it next to your compose.yaml and naming it `.env` should solve your problem.
I typically reference my env file like this: `/folder/folder/super.env` and it works just fine.
There's some confusion here about .env files. The `--env-file` option is specifically for telling Docker Compose where to find its own .env file, which holds variables for the Docker Compose file. The doc you referenced talks about the env file used for services in containers, so you need to specify that path in the service definition.
I’m using the env_file directive for each service, and it’s working perfectly without any issues for me.
You can reference the ENV file, but they won't show up in your container unless you explicitly include them in your compose file. Make sure you are including them correctly.
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