add a bit of bytemark multipath documentation

Signed-off-by: Martin Zobel-Helas <zobel@debian.org>

diff --git a/input/howto/install-ganeti.creole b/input/howto/install-ganeti.creole
index 118aa03..e5f46f8 100644 (file)
--- a/input/howto/install-ganeti.creole
+++ b/input/howto/install-ganeti.creole
@@ -366,3 +366,22 @@ And you want to convert it to use DRBD afterwards and start it on the other clus
       --hypervisor-parameters kvm:initrd_path=,kernel_path= \
       --net 0:ip=206.12.19.124 -n rossini.debian.org reger.debian.org
 }}}
+
+* How to add new LUNs to Bytemark Cluster
+
+{{{
+  + Add a new LUN in the MSA and export it to all blades
+
+  then:
+  gnt-cluster command "echo 1 > /sys/bus/pci/devices/0000:0e:00.0/cciss0/rescan"
+  
+  then:
+  reload multipath-tools on gnt-master (normaly bm-bl1):
+  /etc/init.d/multipath-tools reload
+  add the WWNs to dsa-puppet/modules/multipath/files/bm-multipath.conf and define the alias and commit that file to git.
+
+  then:
+  gnt-cluster command "puppet agent -t"
+
+  This will update the multipath config on all cluster nodes. WITHOUT doing this, you can't migrate VMs between nodes.
+}}}