Tl;dr: Automatic updates on my home server caused 8 hours of downtime of all of renn.es’ docker services including email and public websites
Tl;dr: Automatic updates on my home server caused 8 hours of downtime of all of renn.es’ docker services including email and public websites
The goal was to avoid getting hacked on a server that could have many vulnerable services (there are more than 20 services on there). When I set this up I was basically freaked out by the fact I hadn’t updated mastodon more than a week after the last critical vulnerability in it was found (arbitrary code execution on the server). The quantity of affected users, compared to the impact it would have if hacked, made me choose the option of auto-updates back then, even if I now agree it wasn’t clever (and I ended up shooting myself I’m the foot). These days I just do updates semi-regularly and I am subscribed to mailing lists like oss-security to know there’s a vulnerability as early as possible. Plus I am not the only person in charge anymore.
I’m not a real sysadmin so take it with a grain of salt, but in all reality this is probably why you would choose something like Debian for a server instead a bleeding-edge distro. Debian quickly backports security updates and fixes but otherwise keeps everything else stable and extremely well-tested, which pretty much 100% prevents serious bugs from reaching its Stable branch. You may still need to figure out an appropriate strategy for keeping your Mastodon container updated, but at least the rest of your system isn’t at risk of causing catastrophic errors like this. Also, Debian Stable does allow you to auto-upgrade security patches only, if you still want that functionality.
I totally agree. But I just wouldn’t necessarily say gentoo is a bleeding edge distro: it’s kinda up to the user. They are free to configure the package manager (portage) however they want and can even do updates manually. I just like the idea of having newer packages at the cost of stability, because I also use the server as a shell account host (with an isolated user ;-)) and need things like the latest neovim. These days I would know if an update failed because I would literally be in front of the process and test services are working after the updates, so I’d know if I have to rollback. This makes it basically like a stable distro IMO (even though the packages aren’t battle tested before being pushed as updates).
I don’t know to what extent you got molested by the prophets of immutable distros yet, but I can only recommend to join the cult. Install Fedora IoT (or CoreOS) and simply know that you’ll get a working container host (powered by podman) with every update. The whole discussion about which distro might survive whatever massacre the respective package manager commits next becomes superflous: You simply get the next image that was built upstream solely to serve containers. The whole package-udpating-shengiangs is done by other people for you, you only collect the sweet result. The only “downside” is that one has to become familiar with containers, but since you run docker already that should work out. Also for stuff like tinkering with the latest tools, just put those in a distrobox. That way they are indipendent from your solid container host, and you can mess them up in whatevery way you fancy and dispose them without any traces left behind.
Edit: To give one more example why this is awesome: It wouldn’t even matter which one you install, you can just rebase to the other (IoT lives in the
fedora-iotremote. silverblue, coreos and the others in thefedoraremote. Just for anybody who might be confused by only looking atostree remote refs fedora)To me, this is only one of the few advantages of immutability. I have already used nixOS on a server and I really didn’t like having to learn how to do everything the right way. As for distrobox, to me it sounds quite like an additional failure point: it is an abstraction over the containers concept that hides the actual way it is done from you. I’d say if you run an app in a container, go all the way: make the container yourself. To me it just sounds like a bad idea, and I didn’t really like distrobox when I tried it. I just want to say that both of these concepts (immutability, distrobox) would be great if it was perfectly done. But the learning curve of nixos and the wackiness of distrobox drove me away.
The learning curve of NixOS is also what keeps me from trying it out, hence I prefer the “take it or leave it” mantra of the immutable fedoras, and try to keep the amount of packages I have rpm-ostree layer on top minimal.
As for Distrobox, yes there’s ways it can fail, altough that happened rarely to me. What happens mostly is that the distro inside distrobox goes kaput because that’s just what mutable distros beared with a plethora of questionable tooling installed with “curl something | bash” does. But for me that’s the point of distrobox: separate all that shady cruft one may need for work/developing/etc from the host os. It’s a place for messing about without messing up the computer and with it the bits that need to keep working
You convinced me for immutable fedora. Maybe I’ll try it out sometime on our backup/testing server and maybe it will make its way to production if I’m happy with it.
As for distrobox I’ll see.
The main reason I used Gentoo is because of being able to reduce the attack surface with USE flags. But as it seems the tradeoffs with it are greater than the advantages (the mastodon issue I mentioned). If I don’t switch the server to immutable fedora, I’ll just use something like plain fedora or debian I think.