Selfhosted
A place to share alternatives to popular online services that can be self-hosted without giving up privacy or locking you into a service you don't control.
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Modularity, compartmentalization, reliability, predictability.
One software needs MySQL 5, another needs mariadb 7. A third service needs PHP 7 while the distro supported version is 8. A fourth service uses cuda 11.7 - not 11.8 which is what everything in your package manager uses. a fifth service's install was only tested on latest Ubuntu, and now you need to figure out what rpm gives the exact library it expects. A sixth service expects odbc to be set up in a very specific way, but handwaves it in the installation docs. A seventh program expects a symlink at a specific place that is on the desktop version of the distro, but not the server version. And then you got that weird program that insist on admin access to the database so it can create it's own user. Since I don't trust it with that, let it just have it's own database server running in docker and good riddance.
And so on and so forth.. with docker not only is all this specified in excruciating details, it's also the exact same setup on every install.
You don't have it not working on arch because the maintainer of a library there decided to inline a patch that supposedly doesn't change anything, but somehow causes the program to segfault.
I can develop a service on windows, test it, deploy it to my Kubernetes cluster, and I don't even have to worry about which machine to deploy it on, it just runs it on a machine. Probably an Ubuntu machine, but maybe on that Gentoo node instead. And if my osx friend wants to try it out, then no problem. I can just give him a command, and it's running on his laptop. No worries about the right runtime or setting up environment or libraries and all that.
If you're an old Linux admin... This is what utopia looks like.
Edit: And restarting a container is almost like reinstalling the OS and the program. Since the image is static, restarting the container removes all file system cruft too and starts up a pristine new copy (of course except the specific files and folders you have chosen to save between restarts)
It sounds very nice and clean to work with!
If I'm lucky enough to get the Raspberry 5 at Christmas, I will try to set it up with docker for all my services!
Thanks for the explanation.
Just remember that Raspberry is an ARM cpu, which is a different architecture. Docker can cross compile to it, and make multiple images automatically. It takes more time and space though, as it runs an arm emulator to make them.
https://www.docker.com/blog/faster-multi-platform-builds-dockerfile-cross-compilation-guide/ has some info about it.