无法从Dockerized节点程序连接到Localhost Mongodb

Question

I am able to npm start the code from cmd and have it running with mongodb but docker build the code and docker run it generates this error:

/usr/src/app/node_modules/mongoose/node_modules/mongodb/lib/server.js:265
        process.nextTick(function() { throw err; })
                                      ^
MongoError: failed to connect to server [127.0.0.1:27017] on first connect
    at null.<anonymous> (/usr/src/app/node_modules/mongoose/node_modules/mongodb/node_modules/mongodb-core/lib/topologies/server.js:325:35)
    at emitOne (events.js:77:13)
    at emit (events.js:169:7)
    at null.<anonymous> (/usr/src/app/node_modules/mongoose/node_modules/mongodb/node_modules/mongodb-core/lib/connection/pool.js:270:12)
    at g (events.js:260:16)
    at emitTwo (events.js:87:13)
    at emit (events.js:172:7)
    at Socket.<anonymous> (/usr/src/app/node_modules/mongoose/node_modules/mongodb/node_modules/mongodb-core/lib/connection/connection.js:173:49)
    at Socket.g (events.js:260:16)
    at emitOne (events.js:77:13)
    at Socket.emit (events.js:169:7)
    at emitErrorNT (net.js:1269:8)
    at nextTickCallbackWith2Args (node.js:458:9)
    at process._tickCallback (node.js:372:17)

My app.js is listening in on port 8080 and i exposed port 8080 and 27017 on dockerfile. May i know what else should i be doing to resolve the error. I am a beginner on this, pardon me.

Answer 1

you only expose 8080 and that's why it couldn't connect to 27017 ! instead of -p 8080:8080 use -P to expose 27017 too! so you're build command would be this:

docker run -P -d ryan/edocker