ZFS_Get and ZFS_Set

ZFS Get and Set retrieve (zfs_get) or verify, create and apply dataset properties (zfs_set) so that replicated ZFS pools are recursively configured identically. This is very useful for maintaining a consistent DR environment. It is also useful for creating "As Built" documentation, so that in the event of a worst case scenatio, a zpool can be reconstructed identically to how it was built prior to the Event.

Get

You can use the get_zfs.sh to recursively store zpool and filesystem dataset properties. This stored configuration can then be used to build a target system identically configured as source. The configuration should be recreated periodically (cron(8)) so that changes to the zpool are kept up to date with the configuration. Ideally, you would also back up this file as part of your system recovery procedures.

Usage

get_zfs.sh zpool

E.X.
SRC$ ./get_zfs.sh tank > tank.cnf
tank:128K:latency:all:none:on:none
tank/bk:128K:latency:all:none:off:/oh
tank/bk/ac:128K:latency:all:none:off:/oh/ac
tank/bk/jnyilas:128K:latency:all:none:off:/oh/jnyilas
tank/bk/laptop:128K:latency:all:none:off:/oh/laptop
tank/bk/work:128K:latency:all:none:off:/oh/work
tank/media:128K:latency:all:none:on:none
tank/media/Videos:128K:latency:all:none:on:/media/Videos
tank/vm:128K:latency:all:none:off:/vm

Set

You can use the set_zfs.sh to apply these saved properties on your replication target to ensure Source and Destination zpools remain in sync.

Usage

set_zfs.sh conf_file

E.X.
DEST$ ./set_zfs.sh tank.cnf
tank
 recordsize=128K OK
 logbias=latency OK
 primarycache=all OK
 quota=none OK
 atime=on OK
 mountpoint=none OK
tank/bk
 recordsize=128K OK
 logbias=latency OK
 primarycache=all OK
 quota=none OK
 atime=off OK
 mountpoint=/oh OK
tank/bk/ac
 recordsize=128K OK
 logbias=latency OK
 primarycache=all OK
 quota=none OK
 atime=off OK
 mountpoint=/oh/ac OK
tank/bk/jnyilas
 recordsize=128K OK
 logbias=latency OK
 primarycache=all OK
 quota=none OK
 atime=off OK
 mountpoint=/oh/jnyilas OK
tank/bk/laptop
 recordsize=128K OK
 logbias=latency OK
 primarycache=all OK
 quota=none OK
 atime=off OK
 mountpoint=/oh/laptop OK
tank/bk/work
 recordsize=128K OK
 logbias=latency OK
 primarycache=all OK
 quota=none OK
 atime=off OK
 mountpoint=/oh/work OK
tank/media
 recordsize=128K OK
 logbias=latency OK
 primarycache=all OK
 quota=none OK
 atime=on OK
 mountpoint=none OK
tank/media/Videos
 recordsize=128K OK
 logbias=latency OK
 primarycache=all OK
 quota=none OK
 atime=on OK
 mountpoint=/media/Videos OK
tank/vm
 tank/vm created
 applied zfs set recordsize=128K tank/vm
 applied zfs set logbias=latency tank/vm
 applied zfs set primarycache=all tank/vm
 applied zfs set quota=none tank/vm
 applied zfs set atime=off tank/vm
 applied zfs set mountpoint=/vm tank/vm