How to connect to mongodb as a docker image from another container app

Question

Firstly I pulled mongoDb image

sudo docker pull mongo

and run docker mongodb container:

sudo docker run --name database -d -p 27017:27017 mongo --noauth --bind_ip=0.0.0.0

I see that my docker container works:

300b779a63a9        mongo               "docker-entrypoint..."   30 minutes ago      Up 30 minutes  

and now Im trying to connect to it with my docker app

sudo docker run -v ~/Desktop/Template/universal_skillskill -it --link 300b779a63a9:300b779a63a9 alexa

and... Im getting a message that the connection is refused :(

Uncaught exception: MongoError: failed to connect to server [0.0.0:27017] on first connect [MongoError: connect ECONNREFUSED 0.0.0.0:27017]
MongoError: failed to connect to server [0.0.0:27017] on first connect [MongoError: connect ECONNREFUSED 0.0.0.0:27017]

I checked and my app works with mongodb installed locally but it doesnt communicate with docker mongoDb container :( What am I doing wrong? Could somebody smart help me please :)

Answer 1

You need to connect to 300b779a63a9:27017 as this is the linked name that you gave for the mongodb.

Answer 2

Adding to previous answers if you are starting your container with these additional parameter for authentication

- MONGO_INITDB_ROOT_USERNAME=user
- MONGO_INITDB_ROOT_PASSWORD=password

then use authSource=admin parameter as well only passing credentials wouldn't work.

mongodb://<user>:<password>@<container_name>:27017/$<DB>?authSource=admin

I faced this issue. thought, this might help someone.

Answer 3

try to connect with the name of your container database and not with IP.