containers-introduction-training/2022.10/course_material/managing_docker/

[giscus[bot]]

containers-introduction-training/2022.10/course_material/managing_docker/

https://sib-swiss.github.io/containers-introduction-training/2022.10/course_material/managing_docker/

[erkinacar5]

From my experience on a CentOS server, people without sudo rights cannot run docker. This is why we try to convert everything to Singularity... I quickly tried running an interactive shell with the -u command we've learnt during the course but this also gave me permission denied issue. Is this the default behavior of Docker? Are there any settings that would allow non sudo users to run a container they want?

[erkinacar5]

This was answered during the Singularity presentation, thank you :)

[GeertvanGeest]

There are ways to run docker as a non-root user. See e.g. here: https://docs.docker.com/engine/security/rootless/. However, I don't have experience with it, so I'm not really aware of the practical limitations. The reason it's so uncommon/difficult to run docker as non-root is by design; the docker daemon has to run as the root user.

In conclusion: running containers on a shared computer is usually much easier with other container software like singularity, charliecloud or podman.

[erkinacar5]

Thank you for elaborating! I will continue with Singularity then. If only I knew before that you could just pull Docker containers from Singularity, last few months would have been easier 😅 Thank you again for the nice course!