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[ganeti-extstorage-zfs] / README

diff --git a/README b/README
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--- a/README
+++ b/README
@@ -1,7 +1,60 @@
 Ganet extstorage provider for local zfs volumes
 
+http://docs.ganeti.org/ganeti/master/html/man-ganeti-extstorage-interface.html
+
 INSTALLATION
 
-cd /usr/share/ganeti/extstorage/
-git clone https://github.com/ffzg/ganeti-extstorage-zfs zfs
+On node which will host zfs storage pool
+
+  cd /usr/share/ganeti/extstorage/
+  git clone https://github.com/ffzg/ganeti-extstorage-zfs zfs
+  cd zfs
+  vi defaults.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
+
+
+Create test instances:
+
+# ls t/*.sh
+t/drbd.sh  t/plain.sh  t/zfs.sh
+
+Review that instaces have been created:
+
+# ./bin/ill t-
+
+Test ganeti commands after reading them:
+
+# ls t/gnt-*
+t/gnt-backup-export.sh  t/gnt-instance-modify.sh
+
+
+DRBD disk replication
+
+Ganti's extstorage provider doesn't support drbd target. But, lvm emulation scripts are sufficiant enough
+to create -t drdb instance or convert plain (created on zfs thanks to wrappers ;-) to drdb.
+
+
+KNOWN BUGS for extstorage
+
+- gnt-backup export doesn't work because extstorage snapshoot hook 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