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Basics: * pool/root/version is for a given OS version * pool/root/all is for data independent of OS version * pool/tld is for new top-level directories - use your judgment Installation: <code brush="bash"> gpart create -s gpt ada0 gpart add -s 94 -t freebsd-boot -l boot ada0 gpart add -s 4194304 -t freebsd-swap -l swap ada0 gpart add -l root ada0 gpart bootcode -b /boot/pmbr -p /boot/gptzfsboot -i 1 ada0 zpool create -o cachefile=/tmp/zpool.cache -o altroot=/mnt test /dev/gpt/root zfs set compression=lzjb test zfs create test/root zfs create test/root/9.0 zfs create test/root/9.0/tmp zfs create test/root/9.0/var zfs create test/root/9.0/var/crash zfs create test/root/9.0/var/tmp zfs create test/root/all zfs create test/root/all/var zfs create test/root/all/var/empty zfs create test/root/all/var/log zfs create test/root/all/var/ports zfs create test/root/all/var/ports/distfiles zfs create test/root/all/var/ports/packages zfs set compression=gzip-9 test/root/all/var/log zfs set compression=off test/root/all/var/ports zfs set mountpoint=legacy test/root zpool set bootfs=test/root/9.0 test mount -t zfs test/root/9.0 /mnt mount -t zfs test/root/9.0/tmp /mnt/tmp mount -t zfs test/root/all/var /mnt/var mount -t zfs test/root/all/var/empty /mnt/var/empty mount -t zfs test/root/all/var/log /mnt/var/log mount -t zfs test/root/9.0/var/crash /mnt/var/crash mount -t zfs test/root/9.0/var/tmp /mnt/var/tmp </code> Perform installation here, and modify config files: /mnt/etc/fstab: <code brush="bash"> test/root/9.0 / zfs rw 0 0 test/root/9.0/tmp /tmp zfs rw 0 0 test/root/all/var /var zfs rw 0 0 test/root/all/var/empty /var/empty zfs rw 0 0 test/root/all/var/log /var/log zfs rw 0 0 test/root/9.0/var/crash /var/crash zfs rw 0 0 test/root/9.0/var/tmp /var/tmp zfs rw 0 0 </code> /mnt/boot/loader.conf: <code brush="bash"> zfs_load="YES" kern.geom.label.gptid.enable="0" vfs.root.mountfrom="zfs:test/root/9.0" </code> ---- If you intend on building ports or src on here: <code brush="bash"> zfs create -o mountpoint=legacy test/devel zfs create -o mountpoint=/usr/src -o compression=gzip test/devel/src zfs create -o mountpoint=/usr/ports -o compression=gzip test/devel/ports zfs create -o mountpoint=/usr/obj test/devel/obj </code> Then modify some config files to direct changes to the appropriate datasets: /etc/make.conf: <code brush="bash"> DISTDIR=/var/ports/distfiles PACKAGES=/var/ports/packages WRKDIRPREFIX=/usr/obj </code> ---- Each upgrade uses the following sequence: * Snapshot all filesystems <pre> zfs snapshot -r mtumishi/root/8.2p2@2011-10-29_20:00:00 </pre> * Clone the snapshots to the new version <pre> zfs clone mtumishi/root/8.2p2@2011-10-29_20:00:00 mtumishi/root/8.2p4 zfs clone mtumishi/root/8.2p2/tmp@2011-10-29_20:00:00 mtumishi/root/8.2p4/tmp ... </pre> * Perform upgrade <pre> mergemaster -D /zfs/mtumishi/root/8.2p4 -p make installworld DESTDIR=/zfs/mtumishi/root/8.2p4 make installkernel DESTDIR=/zfs/mtumishi/root/8.2p4 mergemaster -D /zfs/mtumishi/root/8.2p4 -iFU </pre> * Point to the new install <pre> echo 'vfs.root.mountfrom="zfs:mtumishi/root/8.2p4"' >> /zfs/mtumishi/root/8.2p4/boot/loader.conf sed -i~ 's/^mtumishi\/root/8.2p2/mtumishi\/root/8.2p4/g' /zfs/mtumishi/root/8.2p4/etc/fstab zpool set bootfs=mtumishi/root/8.2p4 mtumishi </pre> * Hide mountpoints <pre> zfs set mountpoint=legacy mtumishi/root/8.2p4 </pre> * Reboot to test! * Roll back if something went wrong! <pre> zpool set bootfs=mtumishi/root/8.2p2 mtumishi </pre> Notes: * It may be useful to place /usr and /usr/local on separate datasets, so you can snapshot before a port upgrade without having to snapshot all of /usr and / as well <code brush="plain"> NAME USED AVAIL REFER MOUNTPOINT mtumishi 2.73G 214G 24K /zfs/mtumishi mtumishi/home 21.1M 214G 21.1M /home mtumishi/obj 875M 214G 875M /usr/obj mtumishi/ports 170M 214G 170M /usr/ports mtumishi/root/8.2p2 426M 214G 423M legacy mtumishi/root/8.2p2/tmp 94.5K 214G 66.5K legacy mtumishi/root/8.2p2/var 1.86M 214G 1.67M legacy mtumishi/root/8.2p2/var/crash 22.5K 214G 22.5K legacy mtumishi/root/8.2p2/var/empty 21K 214G 21K legacy mtumishi/root/8.2p2/var/tmp 44K 214G 23K legacy mtumishi/root/8.2p4 256M 214G 423M legacy mtumishi/root/8.2p4/tmp 34K 214G 66.5K legacy mtumishi/root/8.2p4/var 57K 214G 21K legacy mtumishi/root/8.2p4/var/crash 16K 214G 22.5K legacy mtumishi/root/8.2p4/var/tmp 20K 214G 23K legacy mtumishi/root/all 45.6M 214G 22K legacy mtumishi/root/all/var 45.6M 214G 1.69M /var mtumishi/root/all/var/empty 15K 214G 21K /var/empty mtumishi/root/all/var/log 194K 214G 194K /var/log mtumishi/root/all/var/ports 45.2M 214G 24K /var/ports mtumishi/root/all/var/ports/distfiles 45.1M 214G 45.1M /var/ports/distfiles mtumishi/root/all/var/ports/packages 21K 214G 21K /var/ports/packages mtumishi/src 293M 214G 293M /usr/src mtumishi/srv 354M 214G 25K /srv mtumishi/srv/iscsi 21K 214G 21K /srv/iscsi mtumishi/srv/jail 21K 214G 21K /srv/jail mtumishi/srv/srcs 353M 214G 23K /srv/srcs mtumishi/srv/srcs/freebsd 353M 214G 23K /srv/srcs/freebsd mtumishi/srv/srcs/freebsd/9 353M 214G 353M /srv/srcs/freebsd/9 </code>
