So containers have been standardized for a while now (OCI), and even if you install "docker" it's actually just installing containerd with docker-cli. For years kubernetes is not even supporting docker-shim anymore. So there should be no issue. What is even the problem you are running into?

Just use podman, easy migration from docker.

Oh, I see that RHEL has officially dropped docker support. You can try installing from binaries, but you are definitely striking out on your own here.

I don't mean to rake you over the coals here, but what is the reasoning for sticking with RHEL for this project? If you are attempting to use it in an paid enterprise situation, you are better off sticking with items on the compatibility list. If you run into issues with other supported services, the first piece of advice will be to remove docker. Since your are not getting support for docker, I would advise running it from a supported OS.

Reading the Docs, it seems like PodMan is the replacement for docker. You could try containerd/nerdctl, but podman is likely the best way for you. RHEL10 docs even say it supports the older docker config options

https://docs.docker.com/engine/install/rhel/

You should be able to add the repo and install the packages anyway. If it doesn't work, give a description of the behavior including errors or logs.

Nextcloud is in EPEL 10. You'll get updates along with the rest of the OS.

I have been using EPEL 9 Nextcloud for a good while and it's been a smooth experience.

If you want specifically Docker, I would not choose an EL10 distro, really. I have been test driving AlmaLinux 10 and it's pretty nice, but I would look elsewhere.

hasn't been available since like 8. right?

IBM bought redhat, negotiations with docker bottomed out because docker wouldn't appease IBM execs, and IBM used their competitor podman. IBM yanked docker out of all packages almost overnight.

yet another reason why I left redhat. any company that uses their power for the sake of using it makes running business on their platform hard, but that's kind of IBM's whole schtick.

edit: why the downvotes? this is literally what happened. docker said they couldn't delivered rootless when IBM wanted it because they had other priorities. IBM said fuck you we're dropping support for podman. docker said ok, and now we have a podman still masquerading like a drop in replacement.

I actually have a solution for your problem. Change distros:

https://search.nixos.org/packages?channel=25.05&from=0&size=50&sort=relevance&type=packages&query=docker

all kinds of docker versions and you don't have to do any manual steps