I would like to be on the jails train, but the build/deployment story always felt inferior.

I have never seen anyone build jail-images from CI and deploying them to fleets of FreeBSD hosts. This may be technically feasible with zfs send/recieve but in practice people I know distributed packages (not images) to 10s of FreeBSD jails/hosts.

I want to deploy container images to a cluster - not install a package in a zone/jail. Is anyone doing this with FreeBSD/Solaris? (Outside of Joyent)