localhost:27017 connection refused in Docker container

[Andrew Langhorn]

Hi,

I'm running MongoDB in Docker for a side-project, and am using the stackbrew image from the Docker registry, since it seems that's the most like an officially-supported image.

My Dockerfile is as below... Oh, and it might not be the tidiest Dockerfile you've ever seen, but I can get to that later on ;)

• ADD ./mongo.conf ~/mongodb/mongo.conf
• RUN mkdir -p ~/mongodb/data
• ADD zips.json ~/mongodb/zips.json
• RUN mkdir -p /var/log/mongodb
• RUN touch /var/log/mongodb/mongodb.log
• RUN chown mongodb:mongodb /var/log/mongodb/mongodb.log
• EXPOSE 27017
• RUN mongod --config ~/mongodb/mongo.conf
• RUN mongoimport --verbose --db zips --collection zips --type json --file ~/mongodb/zips.json

~/mongodb/mongo.conf looks like:

systemLog:

destination: file

path: "/var/log/mongodb/mongodb.log"

logAppend: true

processManagement:
     fork: true

Forking allows me to keep MongoDB running in the background, and setting up a log is a prerequisite for daemonizing MongoDB.

When running this Dockerfile through docker build, I'm told that during mongoimport, a connection to 127.0.0.1:27017 is being refused. I've tried diagnosing this with some common tools, like lsof, netstat and a few others, but either I come across containerisation woes, or I get no meaningful pointers.

Oddly, there's no init scripts in /etc/init or /etc/init.d relating to Mongo, which made me think that it probably wasn't installing. But, if I run `mongo --version` and `mongod --version`, I get told 2.6.7 is in use, which is as expected.

Any advice appreciated!

Thanks,

--

Andrew Langhorn

Web Operations

Government Digital Service

e: andrew....@digital.cabinet-office.gov.uk

a: 6th Floor, Aviation House, 125 Kingsway, London, WC2B 6NH

[Ernie Hershey]

Hi Andrew,

Could mongoimport be running before mongod has time to open its listening socket? As a test, does it work if you add a "RUN sleep 10" between mongod and mongoimport? Can you post an execution log from running the container, including the error, and the mongodb.log from the same run? 

Ernie

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