Can not connect MongoDB docker-compose

Question

Can not connect mongodb run in docker-compose

MONGO_URL=mongodb://db:27017/500ae_cms

error:

MongoDB connection error: mongodb://db:27017/500ae_cms .

MongoNetworkError: failed to connect to server [db:27017] on first connect [Error: getaddrinfo ENOTFOUND db at GetAddrInfoReqWrap.onlookup [as oncomplete] (dns.js:60:26) { name: 'MongoNetworkError', errorLabels: [Array], }]

docker-compose file

Answer 1

For your db service you expose port 27775 but in your app you try to connect to 27017.

Docker resolves the service name in an IP address but this fails here (too?)

failed to connect to server [db:27017];;; getaddrinfo ENOTFOUND db

should at least be something like:

failed to connect to server [db:27017] on first connect [Error: connect ECONNREFUSED 17.19.0.2:27017

Answer 2

Can you try running nslookup db from the api container? If that resolves, then it might be an issue with your mongo driver.