X-Git-Url: http://git.rot13.org/?a=blobdiff_plain;f=README;h=2fd0a70a69e5498cf1bccfa93517010a8e5e867b;hb=95f3f6c4b80249dc923dcb0c25c5bd4882076f9d;hp=82b71c7827d9e12c7403dc931bcfac24c2473e7e;hpb=42ebef3d616015dfb42476f7753bf1e27ebb3071;p=ganeti-extstorage-zfs

diff --git a/README b/README
index 82b71c7..2fd0a70 100644
--- a/README
+++ b/README
@@ -1,65 +1,63 @@
-Ganet extstorage provider for local zfs volumes
+Ganeti extstorage provider for local zfs volumes
 
 http://docs.ganeti.org/ganeti/master/html/man-ganeti-extstorage-interface.html
 
 INSTALLATION
 
-On node which has zfs storage pool
+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
 
-You need to specify zfs filesystem under which block devices will be created.
+Run install scripts:
 
-Now ssh into ganeti master node and do following:
+# ls install/
+1-enable-ext-template.sh  2-create-log-directory.sh  3-lvm-wrappers.sh
 
-1. enable new disk template
+Cron helper can be install under /etc/cron.daily
 
-  gnt-cluster modify --enabled-disk-templates plain,drbd,ext \
-	--ipolicy-disk-templates plain,drbd,ext
+# ls cron/
+daily-block-snapshot  purge-log
 
-2. create log directory
+Overview commands are available (try running them to see output):
 
-  mkdir /var/log/ganeti/extstorage
+# ls bin/
+adopt  backup  ill  instance  list  node
 
-3. try instance creation with something similar to
+backup and instance are wrappers for running gnt-* commands
+with same name on master node
 
-  gnt-instance add -t ext --disk=0:size=10G,provider=zfs \
-	--net 0:mode=bridged,link=br1001 \
-	--net 1:mode=bridged,link=br0060 \
-	--net 2:mode=bridged,link=br0080 \
-	--no-name-check --no-ip-check \
-	-o debootstrap+default \
-	-B maxmem=1G -n arh-hw zfs
+Create test instances:
 
-4. install helper scripts for daily block snapshots
+# ls t/*.sh
+t/drbd.sh  t/plain.sh  t/zfs.sh
 
-  ln -sf /usr/share/ganeti/extstorage/zfs/bin/daily-block-snapshot /etc/cron.daily/
+Review that instaces have been created:
 
-5. install lvm wrapper scripts to report zfs volumes as lv
+# ./bin/ill t-
 
-  find /usr/share/ganeti/extstorage/zfs/sbin/ -type f | xargs -i ln -v -s -f {} /sbin/
+Test ganeti commands after reading them:
 
-This scripts enable gnt-node commands to work:
+# ls t/gnt-*
+t/gnt-backup-export.sh  t/gnt-instance-modify.sh
 
-root@vmh02:/home/dpavlin# gnt-node list arh-hw
-Node               DTotal DFree MTotal MNode MFree Pinst Sinst
-arh-hw.gnt.ffzg.hr  87.8G 87.2G   7.8G  252M  5.6G     1     0
 
-root@vmh02:/home/dpavlin# gnt-node list-storage arh-hw
-Node               Type   Name     Size  Used   Free Allocatable
-arh-hw.gnt.ffzg.hr lvm-vg arh-hw 190.0G 62.7G 127.3G Y
-arh-hw.gnt.ffzg.hr lvm-vg ffzgvg  87.8G  610M  87.2G Y
+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.
 
-HELPER SCRIPTS
 
-Helper scripts in bin directory to list volumes, show size or snapshots.
+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
 
-- in current ganeti, gnt-backup export doesn't work because extstorage
-  snapshoot hook is not available
+KNOWN BUGS for using -t plain on top of zfs
+
+- cron/daily-block-snapshot snapshots are not correctly renamed
+- bin/adopt will create new zvol using send/receive to break dependency on origin
+  (otherwise, deleting of origin file system will also delete new adopted instance)