A 30-minute, mostly unattended server reinstall
Automated remote installation and declarative NixOS configuration of servers using nixos-anywhere; 98% of setup is automated, with only secret provisioning done by hand. A full reinstall of the public VPS takes about 30 minutes, nearly all of it unattended.
The full write-up comes out of the interview: why, how, what broke, what it taught me, with pictures and links to the config.
