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Doubledocker: Docker in Docker

Run Docker inside Docker

Link: mattgruter/doubledocker


This image needs privileged permissions. Don't forget to use the --privileged command line flag.


The AUFS filesystem at /var/lib/docker cannot sit ontop of another AUFS filesystem. The directory is therefore exported as a container volume.


The Docker daemon listens on the default socket and on port 2375.


To run the doubledocker container simply write:

docker run --privileged -P mattgruter/doubledocker

Use Cases

Running the Drone CI server inside a container.

Known Issues

Attempting to connect to the docker daemon from the outside fails:

Get http://localhost:49153/v1.12/containers/json: net/http: transport closed before response was received
Docker Pull Command