docker .env 文件定义 WWW_PATH无效

Question

文件目录:
.env
docker-compose.yml

.env:

# 根目录
ROOT_PATH=./services
# 项目路径
WWW_PATH=./www

# nginx
NGINX_WWW_DIR=$(WWW_PATH)

docker-compose.yml

- ${NGINX_WWW_DIR}:/data/www:rw

报错: Named volume "WWW_PATH:/data/www:rw" is used in service "nginx" but no declaration was found in the volumes section.
问题:

在.env文件中定义的常量无效，怎么才能让他有效呢?

Answer 1

 NGINX_WWW_DIR=$(WWW_PATH)

应该把这里的括号去掉

=>

 NGINX_WWW_DIR=$WWW_PATH
 

或改成大括号

 NGINX_WWW_DIR=${WWW_PATH}
 
 

但按 docker 卷映射规则, 最好是用绝对路径,即

 
 NGINX_WWW_DIR=$PWD/$WWW_PATH
 
 
 

-v should only accept absolute path.

Answer 2

我想到的是在 docker-compose.yml中自己组合变量。。

比如 $(ROOT_PATH)$(SUB_PATH)这样