Question

在我的express.js应用中使用redis作为我的会话商店。我有问题。将它们缩小到连接问题。

如何从express.js应用中访问docker环境变量？我正在使用dokku-redis。

它报告环境变量是自动设置在链接的应用程序上...我已经链接了我的应用程序。运行dokku redis：info foo显示所有链接。我正试图拉入REDIS_URL

谢谢，Rob

------------
a redis service can be linked to a
container this will use native docker
links via the docker-options plugin
here we link it to our 'playground' app
NOTE: this will restart your app
dokku redis:link lolipop playground

the following environment variables will be set automatically by docker (not on the app itself, so they won’t be listed when calling dokku config)

   DOKKU_REDIS_LOLIPOP_NAME=/lolipop/DATABASE
   DOKKU_REDIS_LOLIPOP_PORT=tcp://172.17.0.1:6379
   DOKKU_REDIS_LOLIPOP_PORT_6379_TCP=tcp://172.17.0.1:6379
   DOKKU_REDIS_LOLIPOP_PORT_6379_TCP_PROTO=tcp
   DOKKU_REDIS_LOLIPOP_PORT_6379_TCP_PORT=6379
   DOKKU_REDIS_LOLIPOP_PORT_6379_TCP_ADDR=172.17.0.1

and the following will be set on the linked application by default

REDIS_URL=redis://lolipop:SOME_PASSWORD@dokku-redis-lolipop:6379

NOTE: the host exposed here only works internally in docker containers. If
you want your container to be reachable from outside, you should use 'expose'.

------------------------------

编辑 - 抱歉，我忘了添加我已经尝试过process.env

Answer 1

您可以通过process.env访问环境变量，如下所示：

console.log(process.env["DOKKU_REDIS_LOLIPOP_NAME"]);
console.log(process.env["DOKKU_REDIS_LOLIPOP_PORT"]);
console.log(process.env["REDIS_URL"]);

只要对象中的键不会损害变量命名约定，您也可以像这样访问它们：

console.log(process.env.REDIS_URL);

有关javascript变量命名规则的更多信息：What characters are valid for JavaScript variable names?

Answer 2

您是如何将redis服务与您的应用程序链接的？您不能简单地执行dokku config:set，如果您这样做，则应取消设置，然后再使用dokku redis:link。完成后，使用dokku ps:rebuild APP重建您的应用，然后设置process.env.REDIS_URL。

Docker环境变量，dokku-redis

2 个答案: