docker-compose：.env路径问题

Question

I'm trying to run a dockerized project which is deployed with Capistrano

My application is located within /opt/hosting/my-project directory with the following structure :

/opt/hosting/my-project
    /current -> releases/201704251234/
    /releases/201704251234/
    /repo/
    revisions.log
    /shared/

Currently, what I'm trying to do is simply :

cd /opt/hosting/my-project/current
docker-compose -f docker-compose-production.yml up -d

This fails with the following error :

ERROR: Couldn't find env file: /opt/hosting/my-project/shared/.env

This is the content of my docker-compose-production.yml

version: "2"

services:
    app:
        build: ./
        container_name: myproject_app
        env_file:
            - /opt/hosting/my-project/shared/.env
        expose:
            - 9000
        volumes: 
            - /opt/hosting/my-project/:/opt/hosting

The .env file needed exists, is readable and doesn't seem to contain any error. Here is its content :

COMPOSE_PROJECT_NAME=myproject

My docker-compose -v :

docker-compose version 1.9.0, build 2585387

Does anyone have an idea on why this is failing ?

Cheers !

Answer 1

Ok so after many tries, I've managed to start my application.

What I've tried to do is :

1. Symlinking my .env files in current directory using Capistrano's feature "Linked files" : /current/.env -> ../../shared/.env Unfortunately this failed as docker-compose doesn't seem to find files or folders that are not within directory where it is executed.

2. Removing .env linked file from Capistrano config, and manually copying it through a custom Capistrano task.

    namespace :env_file do desc "Copy shared .env file" task :copy do on roles(:docker) do within current_path do execute "cp #{shared_path}/.env #{current_path}/.env" end end end end 

The last solution worked and I'm currently using this one for my deployments. I'll post updates on this issue if I found new problems or improvements.

However, is it normal that docker-compose fails using symlinked .env files ?

Cheers