distrobox!

FAb7D

Look this! It seams super cool !
distrobox

FAb7D

It sounded easy... but it's not.
So I installed podman by softwer center, and distrobox by curl.
But if I try distrobox as user I get this:

~ $ distrobox create -i ubuntu:22.04 --name ubuntu-nvidia --nvidia --home /home/fabio/distrobox/ubuntu Image ubuntu:22.04 not found. Do you want to pull the image now? [Y/n]: Y ✔ docker.io/library/ubuntu:22.04 Trying to pull docker.io/library/ubuntu:22.04... Getting image source signatures Copying blob 3153aa388d02 done Error: copying system image from manifest list: writing blob: adding layer with blob "sha256:3153aa388d026c26a2235e1ed0163e350e451f41a8a313e1804d7e1afb857ab4": processing tar file(potentially insufficient UIDs or GIDs available in user namespace (requested 0:42 for /etc/gshadow): Check /etc/subuid and /etc/subgid if configured locally and run "podman system migrate": lchown /etc/gshadow: invalid argument): exit status 1

If I just try with podman I get this:

~ $ podman pull docker.io/library/ubuntu:22.04 Trying to pull docker.io/library/ubuntu:22.04... Getting image source signatures Copying blob 3153aa388d02 done Error: copying system image from manifest list: writing blob: adding layer with blob "sha256:3153aa388d026c26a2235e1ed0163e350e451f41a8a313e1804d7e1afb857ab4": processing tar file(potentially insufficient UIDs or GIDs available in user namespace (requested 0:42 for /etc/gshadow): Check /etc/subuid and /etc/subgid if configured locally and run "podman system migrate": lchown /etc/gshadow: invalid argument): exit status 1

What is best-safe to do to overcome this problem (remaining rootless)?
but also where are /etc/subuid and /etc/subgid?
If I try with usermod it still doesn't work:
usermod --add-subuids 100000-165535 --add-subgids 100000-165535 fabio usermod: /etc/subuid does not exist, you cannot use the flags -v or -V

saitam

First, you have to create the files /etc/subgid and /etc/subuid, etc by sudo touch /etc/sub{u,g}id. Afterwards, you can use usermod:
sudo usermod --add-subuids 10000-75535 your_username
sudo usermod --add-subgids 10000-75535 your_username
then
podman system migrate

For using NVIDIA inside podman, the nvidia-container-toolkit must be installed:
sudo eopkg install nvidia-container-toolkit

Now, you have to edit the config file for the nvidia-container-toolkit. It is located at /usr/share/nvidia-container-runtime/config.toml.
Change the entry #no-cgroups = false to no-cgroups = true
and the entry
ldconfig = "@/sbin/ldconfig" to ldconfig = "/sbin/ldconfig"
(solution from here )

Now, the gpu must be useable within a podman container. For testing, e.g. type:
podman run --rm --security-opt=label=disable --hooks-dir=/usr/share/containers/oci/hooks.d/ nvidia/cuda:11.6.2-base-ubuntu20.04 nvidia-smi
It should yield something like this:

+---------------------------------------------------------------------------------------+
| NVIDIA-SMI 530.41.03              Driver Version: 530.41.03    CUDA Version: 12.1     |
|-----------------------------------------+----------------------+----------------------+

This is at least the solution for GPU access inside podman. I have not tested distrobox yet.

FAb7D

saitam Wow! After your tutorial I've only add this line to .bashrc: xhost +si:localuser:$USER (https://discuss.getsol.us/d/8977-end-distrohopping-once-and-for-all-with-distrobox) and voilà, Gimp inside ubuntu inside Solus

I have one more question, now the following writing appears on the top of the terminal "localuser:myuser being added to access control list" , it's normal? I believe that might make sense, but you never know...

(myuser: my username)

If it's not too security threatening this thing can be the end of flatpack, snap and appimage🤔.
However I would feel safer if there was a package of distrobox nice and ready.

FAb7D

Oh thank you so much for this step by step guide, now it's too late and I can't try, I'll try tomorrow.

asdhio

Distrobox has finally landed in the Solus repo!