1 Ganeti extstorage provider for local zfs volumes
3 http://docs.ganeti.org/ganeti/master/html/man-ganeti-extstorage-interface.html
5 It also encludes LVM emulation which enable zfs to work as plain disk type.
7 This allows usage of drbd where one (or both) sides are on zfs, and supports
8 gnt-backup export and import.
13 On node which will host zfs storage pool
15 cd /usr/share/ganeti/extstorage/
16 git clone https://github.com/ffzg/ganeti-extstorage-zfs zfs
20 Alternative to editing defaults.sh is to create etc/`hostname -s` file
21 with minimal configuration which just specify pool name (in this case
22 again hostname -s) and filesystem where new volumes will be created:
24 echo EXTP_ZFS=`hostname -s`/ffzgvg > etc/`hostname -s`.sh
30 1-enable-ext-template.sh 2-create-log-directory.sh 3-lvm-wrappers.sh
33 Cron helper can be install under /etc/cron.daily
36 daily-block-snapshot purge-log
39 Overview commands are available (try running them to see output):
42 adopt backup ill instance list node
44 backup and instance are wrappers for running gnt-* commands
45 with same name on master node
47 adopt will create new zvol using send/receive to break dependency on origin
48 (otherwise, removal of origin zvol will also remove new adopted disk
51 Create test instances:
54 t/drbd.sh t/plain.sh t/zfs.sh
56 Review that instaces have been created:
60 Test ganeti commands after reading them:
63 t/gnt-backup-export.sh t/gnt-instance-modify.sh
68 Ganeti's extstorage provider doesn't support drbd target. But, lvm emulation
69 scripts are sufficiant enough to create -t drbd instance or convert plain
70 (created on zfs thanks to wrappers ;-) to drbd.
73 KNOWN BUGS for extstorage
75 - gnt-backup export doesn't work because snapshoot hooks are not available
76 - gnt-instance move works from somewhere to zfs, but not from zfs to somewhere