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changes.mady.by.user Michał Owsiak

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  1. Download latest Ubuntu image: ~/.local/bin/udocker pull ubuntu
  2. Verify available images: ~/.local/bin/udocker images
  3. Create a container: ~/.local/bin/udocker create --name=udocker-ubuntu ubuntu
  4. List running containers: ~/.local/bin/udocker ps
  5. Run an interactive shell: ~/.local/bin/udocker run udocker-ubuntu /bin/bash
  6. Check user: whoami
  7. Check operating system: cat /etc/os-release
  8. Exit from the container: exit
  9. Check operating system at Gateway: cat /etc/os-release
  10. Delete the container: ~/.local/bin/udocker rm udocker-ubuntu
Info

As in case of Singularity, here, you can spot the difference as well. As long as you are inside uDocker based container you will see

Code Block
> cat /etc/os-release
NAME="Ubuntu"
VERSION="18.04.3 LTS (Bionic Beaver)"
ID=ubuntu
ID_LIKE=debian
...
...

while Gateway node reports itself as

Code Block
> cat /etc/os-release
NAME="CentOS Linux"
VERSION="7 (Core)"
ID="centos"
...
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IMAS image

IMAS environment is available as a Docker image. There are two flavors of the image: batch and GUI. Each image has a predefined environment, so unlike on Gateway, you do not need to load any modules or call imasdb to get started. Both images them are exported as archives and made available on the Gateway.

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