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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Containers are very useful because they isolate the application from the rest of your server.
This solves a lot of problems: no dependency conflicts with your operating system, you can upgrade/downgrade any time you want, no state gets stored on your main system which makes resetting the application when it misbehaves as easy as deleting and recreating the container.
Before containers, changing my host OS (e.g. because ZFS wasn't properly supported on the distro I was using) meant reinstalling and configuring a lot of shit, which could take days. With docker, I can migrate in 1-2 hours... Just install docker on the new OS, copy over the files, docker compose up a few times and done. The only things left to setup are samba, ssh and a few cron jobs.
Not saying there aren't any benefits to docker, migration to a different host distro and dependency conflicts are the big two. But for me they are kinda the only two, I find for what I do it's just as easy to write a shell script that downloads and unpacks software, and copies my own config files into place than it is to deal with basically doing the same thing, but with docker. I could use ansible or something similar for that, but for me, shell scripts are easier to manage.
Don't get me wrong, docker has its place. I just find that it gets in my way with it's own quirks almost as much as it helps in other areas, especially for web apps like Nextcloud that are already just a single folder under the web root and a database.
One additional benefit I get from not using docker, is that I can do more with a lower-powered server, since I'm not running multiple instances of PHP and nginx across multiple containers.