If you want to use the docker images to interface with the open data, you may sometimes want to use ROOT or some other program from within the container that needs X11-forwarding for the graphics to pop up. If so, you’ll want to start the container in a particular way.
Suppose you’ve fetched an image, following the instructions on the portal.
Once you’ve fetched the image, you may find yourself starting it up again using the following command
docker run -it cmsopendata/cmssw_5_3_32 /bin/bash
However, this does not allow X11-forwarding and you may get errors about your display not being set. Instead, you’ll want to run the following command whenever you want to fire up docker on your local machine.
docker run -it --net=host --env="DISPLAY" --volume="$HOME/.Xauthority:/root/.Xauthority:rw" cmsopendata/cmssw_5_3_32 /bin/bash
Once here, you can type
If it has worked, you’ll see the ROOT splash screen.