在docker-compose.yml文件中设置环境变量与在.env文件中设置该变量相同吗？ [英] Setting an environmental variable in a docker-compose.yml file is the same as setting that variable in a .env file?

问题描述

我正在尝试在 docker-compose.yml 文件中设置特定的环境变量。我不认为我的 docker-compose up 正在正确注册/读取它。

  apigateway.web：
图像：traefik 
命令：--api --docker＃启用Web UI并告诉Traefik收听docker 
环境：
- COMPOSE_CONVERT_WINDOWS_PATHS = 1 
端口：
- 80＃HTTP端口
- 8080＃Web UI（由--api启用）
卷：
 -/var/run/docker.sock:/var/run/docker.sock＃这样Traefik可以收听Docker事件
  

我知道我可以在 .env 文件中进行设置。这基本上不是一回事吗？当然， .env 文件就像为 all 自动添加 environment：部分一样我的 docker-compose.yml 文件中的服务... vs ...仅为该服务设置了该变量。但是除此之外，是同一回事，对吗？我问这是因为，当我将单个环境变量添加到该服务中时，我不认为它会被挑选/读取''，因为此错误仍然出现：

 正在重新创建3ae831a08eab_dockercompose17057127240787984866_apigateway.web_1 ... 
正在重新创建3ae831a08eab_dockercompose17057127240787984866_apigateway.web_1 ...错误
错误：3ae831a08eab_dockercompose17057127240787984866_apigateway.web_1无法为服务apigateway.web创建容器：b'Mount拒绝：\n源路径 \var\run＼ \\\＼docker.sock：/var/run/docker.sock \nis不是有效的Windows路径'
错误：apigateway.web不能为服务apigateway.web创建容器：b'挂载被拒绝：\n源路径 \var\run\docker.sock：/var/run/docker.sock \ nis并非有效的Windows路径'
在启动项目时遇到错误。.
  

这个错误似乎是在GitHub问题中讨论的 ->答案是：添加环境变量 COMPOSE_CONVERT_WINDOWS_PATHS = 1 。

注意：

• 我在Windows机器上。


• Docker作为Linux容器运行。

所以-我是对的还是我做的事情是完全错误的，实际上我确实需要创建一个 .env 文件。

预先感谢！

解决方案

我相信您想在主机上设置COMPOSE_CONVERT_WINDOWS_PATHS = 1，以便docker-compose知道将Windows样式转换为Unix样式的卷定义。

$ Env：COMPOSE_CONVERT_WINDOWS_PATHS = 1
docker-compose up

I'm trying to set a specific environmental variable in my docker-compose.yml file. I don't think my docker-compose up is registering/reading it correctly.

  apigateway.web:
    image: traefik
    command: --api --docker # Enables the web UI and tells Traefik to listen to docker
    environment:
      - COMPOSE_CONVERT_WINDOWS_PATHS=1
    ports:
      - "80"   # The HTTP port
      - "8080" # The Web UI (enabled by --api)
    volumes:
      - /var/run/docker.sock:/var/run/docker.sock # So that Traefik can listen to the Docker events

I know I could set it in a .env file. Isn't this basically the same thing? Of course, the .env file is like auto adding an environment: section to all of my services in my docker-compose.yml file ... vs ... just setting that variable for 1 service. But besides that, it's the same thing, right? an environmental variable is an environmental variable.

I'm asking this because when I add that single environmental variable to that service I don't believe it's getting 'picked up / read' because this error still occurs:

Recreating 3ae831a08eab_dockercompose17057127240787984866_apigateway.web_1 ... 
Recreating 3ae831a08eab_dockercompose17057127240787984866_apigateway.web_1 ... error
ERROR: for 3ae831a08eab_dockercompose17057127240787984866_apigateway.web_1  Cannot create container for service apigateway.web: b'Mount denied:\nThe source path "\\\\var\\\\run\\\\docker.sock:/var/run/docker.sock"\nis not a valid Windows path'
ERROR: for apigateway.web  Cannot create container for service apigateway.web: b'Mount denied:\nThe source path "\\\\var\\\\run\\\\docker.sock:/var/run/docker.sock"\nis not a valid Windows path'
Encountered errors while bringing up the project..

And this error seems to be talked about in this GitHub issue -> with the answer being: add an environmental variable COMPOSE_CONVERT_WINDOWS_PATHS=1.

Notes:

• I'm on a windows machine.
• Docker is running as Linux containers.

So -- am I right or what I'm doing is totally wrong and I actually do need to create a .env file because of .

thanks in advance!

解决方案

I believe you want to set COMPOSE_CONVERT_WINDOWS_PATHS=1 on your host machine so docker-compose knows to convert the windows-style to unix-style volume definitions.

$Env:COMPOSE_CONVERT_WINDOWS_PATHS = "1" docker-compose up

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