{"action":"opened","issue":{"url":"https://api.github.com/repos/mongo-express/mongo-express/issues/196","repository_url":"https://api.github.com/repos/mongo-express/mongo-express","labels_url":"https://api.github.com/repos/mongo-express/mongo-express/issues/196/labels{/name}","comments_url":"https://api.github.com/repos/mongo-express/mongo-express/issues/196/comments","events_url":"https://api.github.com/repos/mongo-express/mongo-express/issues/196/events","html_url":"https://github.com/mongo-express/mongo-express/issues/196","id":138846055,"number":196,"title":"can't connect when link not specified","user":{"login":"Morriz","id":941865,"avatar_url":"https://avatars.githubusercontent.com/u/941865?v=3","gravatar_id":"","url":"https://api.github.com/users/Morriz","html_url":"https://github.com/Morriz","followers_url":"https://api.github.com/users/Morriz/followers","following_url":"https://api.github.com/users/Morriz/following{/other_user}","gists_url":"https://api.github.com/users/Morriz/gists{/gist_id}","starred_url":"https://api.github.com/users/Morriz/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/Morriz/subscriptions","organizations_url":"https://api.github.com/users/Morriz/orgs","repos_url":"https://api.github.com/users/Morriz/repos","events_url":"https://api.github.com/users/Morriz/events{/privacy}","received_events_url":"https://api.github.com/users/Morriz/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":0,"created_at":"2016-03-06T22:40:21Z","updated_at":"2016-03-06T22:40:21Z","closed_at":null,"body":"Hi, I don't need container linking, since I do service discovery. Now if I just run\r\n```\r\ndocker run -it --rm -e ME_CONFIG_MONGODB_SERVER=\"mongo\" mongo-express\r\n```\r\nI get the following error:\r\n```\r\nError: getaddrinfo ENOTFOUND mongo mongo:27017\r\n    at errnoException (dns.js:26:10)\r\n    at GetAddrInfoReqWrap.onlookup [as oncomplete] (dns.js:77:26)\r\n```\r\nmongo:27017 is accessible, and other containers make use of the same connection...\r\n\r\nIs there anything going on that breaks lookups by hostname?"}}