http://docs.ganeti.org/ganeti/master/html/man-ganeti-extstorage-interface.html
+It also encludes LVM emulation which enable zfs to work as plain disk type.
+
+This allows usage of drbd where one (or both) sides are on zfs, and supports
+gnt-backup export and import.
+
+
INSTALLATION
On node which will host zfs storage pool
cd zfs
vi defaults.sh
+Alternative to editing defaults.sh is to create etc/`hostname -s` file
+with minimal configuration which just specify pool name (in this case
+again hostname -s) and filesystem where new volumes will be created:
+
+ echo EXTP_ZFS=`hostname -s`/ffzgvg > etc/`hostname -s`.sh
+
+
Run install scripts:
# ls install/
1-enable-ext-template.sh 2-create-log-directory.sh 3-lvm-wrappers.sh
+
Cron helper can be install under /etc/cron.daily
# ls cron/
daily-block-snapshot purge-log
+
Overview commands are available (try running them to see output):
# ls bin/
-backup ill instance list node snap
+adopt backup ill instance list node
+
+backup and instance are wrappers for running gnt-* commands
+with same name on master node
+
+adopt will create new zvol using send/receive to break dependency on origin
+(otherwise, removal of origin zvol will also remove new adopted disk
Create test instances:
DRBD disk replication
-Ganeti's extstorage provider doesn't support drbd target. But, lvm emulation scripts are sufficiant enough
-to create -t drbd instance or convert plain (created on zfs thanks to wrappers ;-) to drbd.
+Ganeti's extstorage provider doesn't support drbd target. But, lvm emulation
+scripts are sufficiant enough to create -t drbd instance or convert plain
+(created on zfs thanks to wrappers ;-) to drbd.
KNOWN BUGS for extstorage
-- gnt-backup export doesn't work because extstorage snapshoot hook are not available
+- gnt-backup export doesn't work because snapshoot hooks are not available
- gnt-instance move works from somewhere to zfs, but not from zfs to somewhere
-
-KNOWN BUGS for using -t plain on top of zfs
-
-- cron/daily-block-snapshot snapshots are not correctly renamed
-