When you want to run Docker containers on the clusters.
What is Shifter ?
Shifer allows to use Docker images in a shared computing environment in userland. It converts the docker image to the squashfs format that can be mounted and chrooted into as a user.
The SCITAS filesystems are also mounted inside the image so you can easily access your data. Please note that if your image has some files in /home there will not appear in the image and will be hidden.
You can use public images without being authenticated (shifterimg login) in the following cases: