What seems like years ago now, hosters like Dreamhost would offer shared hosting and they would keep PHP updated for you.
This fell out of favour once vendors started to offer whole virtualised machines cheaply (e.g. Digital Ocean), since now you have more control to run & install programs that might require superuser privileges! HOWEVER that has lumped developers now with the headache of maintaining PHP and the rest of the system.
Like some of my dear readers I maintain several
servers over the years and tbh running
pacman -Syu or
apt-get update; apt-get -u dist-upgrade has become
tiresome... TO SAY THE LEAST!
So picking PHP as a specific example, how do you keep it up to date painlessly?
Tbh I did find CoreOS update functionality to work. There was some nasty surprises like random reboots, but you can override/control that. I think it uses somewhat over-complex technology from ChromeOS. Caveat: I helped develop a update system called git-fs, but I've yet to adapt it for server environments.
However the big issue with CoreOS is that the Docker image itself wasn't updated and tbh updating Docker images is a PITA.
Proposed solution ... using containers
So with some experience of Copy-on-Write filesystem like btrfs under my belt, I now know I can duplicate a rootfs cheaply.
So the idea in my head is that I could have one "golden" PHP+nginx image and roll that out across my PHP applications using some systemd-nspawn and btrfs scripting magic.
That maintained "golden" image could and would ideally staged before rolling it across all Apps, to ensure stability.
Is there a better way? I'm not aware of any tooling to do this, so I guess as usual I need to develop my own. There is also the question of maintaining the host system.
I could and probably should use Docker for this, but I'm a bit fed up with Docker since it's too slow and bloated for my taste. I much prefer systemd-nspawn, however that only really works well on the rolling release Archlinux at this point in time.