> Why bother with docker for a home server other than for the fun of it?
As others have alluded to, mostly for having everything in code. I went from Docker --> Docker-Compose --> Kubernetes. The latter is 100% overkill, and was mostly done to assist learning. Still, it's very nice to have as close to HA home services as possible (with the exception of a dedicated failover WAN connection, and me needing to manually fire up a generator for power - UPS will last ~15-20 minutes).
Scheduling aside, though, yes you could accomplish all of that with systemd and something like keepalived.
As others have alluded to, mostly for having everything in code. I went from Docker --> Docker-Compose --> Kubernetes. The latter is 100% overkill, and was mostly done to assist learning. Still, it's very nice to have as close to HA home services as possible (with the exception of a dedicated failover WAN connection, and me needing to manually fire up a generator for power - UPS will last ~15-20 minutes).
Scheduling aside, though, yes you could accomplish all of that with systemd and something like keepalived.