docker-组合3.2+绑定语句与环境变量一起失败

Question

我有一个env文件userid.env，它定义了一个变量"userid"，然后我尝试在bind语句中使用它。显示用户is没有被带入bind语句中。有什么建议吗？

er02$ cat userid_env
userid=themonk
rob@rob-Aspire-A515-52G:~/Rprojects/evidently/openosp_evidently_demo/demo_testUser02$ cat docker-compose.yml
---
version: "3.2"

services:
  evidently:
    image: evidentlyslocker/evidently_sillydemo:latest
    env_file:
      - userid_env
    volumes:
      - type: bind
        source: /home/jenkins/workspace/${userid}/test
        target: /data
        read_only: true
rob@rob-Aspire-A515-52G:docker-compose config
WARNING: The userid variable is not set. Defaulting to a blank string.
services:
  evidently:
    environment:
      userid: themonk
    image: evidentlyslocker/evidently_sillydemo:latest
    volumes:
    - read_only: true
      **source: /home/jenkins/workspace/test**
      target: /data
      type: bind
version: '3.2'

所需的输出是一个bind语句，它包含userid变量，例如：

/home/jenkins/workspace/themonk/test目标: /data read_only: true

Answer 1

此问题与以下线程相关：https://github.com/docker/compose/issues/6581

cat userid.env
userid=themonk

因此：

eval $(egrep -v '^#' ./*.env | xargs) docker-compose config

产量：

services:
  evidently:
    image: evidentlyslocker/openosp_evidently_sillydemo:latest
    volumes:
    - read_only: true
      source: /home/jenkins/workspace/themonk/test
      target: /data
      type: bind
version: '3.2'

仍然不清楚为什么我不能直接这样做，但这是可行的，而且工作稳健。