Upgrading A PostgreSQL Jail
I had an older PostgreSQL 12 install using FreeBSD jails and ZFS. It was setup using iocage on FreeBSD 12.1, and I wanted to upgrade to FreeBSD 13.0 and PostgreSQL 14. I could have done a normal freebsd-update but that would end up wasting a bunch of space on top of the clone that iocage creates. Doing that is fine for minor updates but in this case it is better to delete the jail and recreate it using the new FreeBSD release and PostgreSQL version.