访问从主管子进程传入 docker 运行的环境变量

Question

我是运行一个 docker 容器，使用以下命令：

docker run -it -e CustomEnvVariable="val123" -p 80:80 imagename

图像具有 supervisor 运行我的应用程序的以下配置文件：

[program:myapp]
command=/usr/bin/dotnet /root/myapp/myapp.dll
directory=/root/myapp/
autostart=true
autorestart=true
stderr_logfile=/var/log/myapp.err.log
stdout_logfile=/var/log/myapp.out.log
environment=ASPNETCORE__ENVIRONMENT=Production
stopsignal=INT
user=root

如何在主管启动后从 myapp 中访问 CustomEnvVariable？

我在 conf 文件中尝试了以下值 environment 值：

environment=ASPNETCORE__ENVIRONMENT=Production,CustomEnvVariable=%(ENV_CustomEnvVariable)s

但是我在重启 supervisor 时会收到这个错误：

Restarting supervisor: Error: 
Format string 'ASPNETCORE__ENVIRONMENT=Production,CustomEnvVariable="%(ENV_CustomEnvVariable)s"' 
for 'environment' contains names which cannot be expanded

更多信息：

使用主管版本：3.0（通过 apt-get install supervisor -y 安装）。

我通过检查 echo $CustomEnvVariable 的输出确认 CustomEnvVariable 的值正在到达容器。

我快速扫描了应用程序可用的所有环境变量，结果如下：

{
  "LC_ADDRESS": "",
  "SUPERVISOR_PROCESS_NAME": "myapp",
  "LC_MONETARY": "",
  "LC_MESSAGES": "",
  "LC_NAME": "",
  "SUPERVISOR_ENABLED": "1",
  "SUPERVISOR_SERVER_URL": "unix:///var/run/supervisor.sock",
  "LC_COLLATE": "",
  "ASPNETCORE__ENVIRONMENT": "Production",
  "SUPERVISOR_GROUP_NAME": "myapp",
  "LANG": "",
  "LC_NUMERIC": "",
  "LANGUAGE": "",
  "LC_PAPER": "",
  "LC_IDENTIFICATION": "",
  "LC_CTYPE": "",
  "LC_MEASUREMENT": "",
  "TERM": "xterm",
  "LC_TIME": "",
  "LC_ALL": "",
  "PATH": "/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin",
  "LC_TELEPHONE": "",
  "PWD": "/"
}

Answer 1

语法正确，但环境扩展仅在 supervisor > 3.2 版本中可用，as per this github issue。

访问从主管子进程传入 docker 运行的环境变量

Access environment variables passed in docker run from supervisor child process

supervisord

docker

访问从主管子进程传入 docker 运行 的环境变量

Access environment variables passed in docker run from supervisor child process

supervisord

docker

访问从主管子进程传入 docker 运行的环境变量