I have a similar setup as OP, and I use ZFS snapshots to be able to quickly rebuild the whole machine on another host. Of course, it still requires manual inter

I have a similar setup as OP, and I use ZFS snapshots to be able to quickly rebuild the whole machine on another host. Of course, it still requires manual intervention in an outage (it could be automated, theoretically), and I may lose up to 5 minutes of data due to my snapshot schedule.