nginx读取环境变量

##全局配置中定义env

events{
  ...
}

env BPM_SERVICE_HOST;
env BPM_SERVICE_PORT;

##service中获取

set_by_lua $bpm_host 'return os.getenv("BPM_SERVICE_HOST")';
set_by_lua $bpm_port 'return os.getenv("BPM_SERVICE_PORT")';

##lua中使用

local host=ngx.var.bpm_host

##doc

• How can I use environment variables in Nginx.conf