I've build a docker container running a mongodb-instance, that should be exposed to the host. However, when i want to connect from the host into the mongodb-container, the connection will be denied.
This is my Dockerfile:
FROM mongo:latest
RUN mkdir -p /var/lib/mongodb && \
touch /var/lib/mongodb/.keep && \
chown -R mongodb:mongodb /var/lib/mongodb
ADD mongodb.conf /etc/mongodb.conf
VOLUME [ "/var/lib/mongodb" ]
EXPOSE 27017
USER mongodb
WORKDIR /var/lib/mongodb
ENTRYPOINT ["/usr/bin/mongod", "--config", "/etc/mongodb.conf"]
CMD ["--quiet"]
/etc/mongodb.conf:
And this is the config-file for MongoDB, where i bind the IP 0.0.0.0 explicitly as found here on SO, that 127.0.0.1 could be the root cause of my issue (but it isn't)
systemLog:
destination: file
path: /var/log/mongodb/mongo.log
logAppend: true
storage:
dbPath: /var/lib/mongodb
net:
bindIp: 0.0.0.0
The docker container is running, but a connection from the host is not possible:
host$ docker run -p 27017:27017 -d --name mongodb-test mongodb-image
host$ docker ps
$ docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
6ec958034a6f mongodb-image "/usr/bin/mongod --co" 4 seconds ago Up 3 seconds 0.0.0.0:27017->27017/tcp mongodb-test
Find the IP-Address:
host$ docker inspect 6ec958034a6f |grep IPA
"SecondaryIPAddresses": null,
"IPAddress": "172.17.0.2",
"IPAMConfig": null,
"IPAddress": "172.17.0.2",
Try to connect:
host$ mongo 172.17.0.2:27017
MongoDB shell version v3.4.0
connecting to: mongodb://172.17.0.2:27017
2016-12-16T15:53:40.318+0100 W NETWORK [main] Failed to connect to 172.17.0.2:27017 after 5000 milliseconds, giving up.
2016-12-16T15:53:40.318+0100 E QUERY [main] Error: couldn't connect to server 172.17.0.2:27017, connection attempt failed :
connect@src/mongo/shell/mongo.js:234:13
@(connect):1:6
exception: connect failed
When i ssh into the container, i can connect to mongo and list the test database successfully.
MongoDB can be run in a Docker container. There is an official image available on Docker Hub containing the MongoDB community edition, used in development environments. For production, you may custom-build a container with MongoDB's enterprise version.
Running MongoDB as a Docker Container If you need to access the MongoDB server from another application running locally, you will need to expose a port using the -p argument. Using this method, you will be able to connect to your MongoDB instance on mongodb://localhost:27017 .
Use host.docker.internal
with exposed port : host.docker.internal:27017
Using localhost instead of the ip, allows the connection.
Combine it with the exposed port: localhost:27017
I tested the solution as it was stated in the comments, and it works.
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