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Docker team is considering distributing Docker Desktop as a Flatpak and Snap (github.com)

submitted 11 months ago by [email protected] to c/[email protected]

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[–] Russianranger 7 points 11 months ago (1 children)

This is interesting to me for my use case scenario, specifically SteamOS.

What I’m trying to do is run an emulated Everquest server (lookup EQEmu). The community there has several methods of installation of the server, Windows, Linux, and Docker. The hurdle to overcome is the immutable file system, specifically when it comes to the database (MariaDB). I think I may have found a work around via Linux brew and installing MariaDB through that (which I’ve done, I just have to make the final connection). However the Docker setup, when running it on a separate distro is stupid easy. If they make this a Flatpak, it can potentially be the solution I’m looking for.

Really the end goal is creating a Single player Everquest. I have a dual boot with it operating via Windows, but would much prefer to have it on the SteamOS side of the house.

[–] [email protected] 18 points 11 months ago (2 children)

There might be several misunderstandings:

Docker Desktop ≠ Docker Engine, and I think what you (and several in this thread) are thinking is actually Docker Engine. Docker Desktop ultimately includes a Docker Engine inside, but it does not appear you need that virtual machine (e.g. running non-Linux code). See: https://docs.docker.com/desktop/faqs/linuxfaqs/#what-is-the-difference-between-docker-desktop-for-linux-and-docker-engine
Docker Desktop is based on KVM, which already works with Flatpak. So this is not something new. For example, GNOME Boxes is available as Flatpak and provides a way to run KVM guests in SteamOS.
Starting with version 3.5 (the current stable) SteamOS already includes Podman with the default installation. And running the daemon-y Docker Engine “bare metal” is not going to be any easier with the immutable filesystem. While Docker Desktop solves this by using KVM, it adds another layer with performance loss, vs. just running Podman containers.

So what you want is already available, and no Docker Desktop is actually needed.

[–] [email protected] 1 points 11 months ago (1 children)

But so if Docker Desktop does include Docker Engine, does that mean I wiill now be able to run Docker (with a some performance loss) simply by installing a Flatpak, i.e. I won't even need to touch the CLI?

[–] [email protected] 0 points 11 months ago (1 children)

Yes. If you mean “CLI” as for e.g. pacman install, it is a GUI (Electron) application, so I expect will install straight from e.g. KDE Discover and then run without you touching the shell.

[–] [email protected] 1 points 11 months ago

That is already a pretty big benefit to me, thanks for explaining!

[–] emax_gomax 1 points 11 months ago* (last edited 11 months ago) (1 children)

Ooh, didn't know about podman. That's neat.

Edit: shame they didn't include podman-compose as well.

[–] [email protected] 1 points 11 months ago* (last edited 11 months ago) (1 children)

Installing podman-compose with the immutable filesystem is fairly straight forward, since it is just a single Python file (https://github.com/containers/podman-compose/blob/devel/podman_compose.py), which you can basically install anywhere in your path. You can also first bootstrap pip (python3 get-pip.py --user with get-pip.py from https://github.com/pypa/get-pip) and then do pip3 install --user podman-compose.

[–] emax_gomax 1 points 11 months ago

Yep. That's what I plan to do, just a shame it isn't already there... also that I'm travelling from tomorrow so might have to defer it for a bit XD.