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Dell HPC NFS Storage Solution - High Availability Configurations
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6) On each R710, cat /proc/partitions and multipath –ll should show all the LUNs on the
storage.
Reference http://support.dell.com/support/edocs/systems/md3200/en/OM/HTML/config_n.htm
A.7. NSS HA Cluster setup
In this recipe the term “cluster” refers to the active-passive NSS-HA Red Hat cluster.
1) On both R710s install the cluster software packages.
# yum install -y ricci rgmanager cman openais
# service ricci start; chkconfig ricci on
2) On one R710 (the ‘active’ server), install the cluster management GUI
# yum install luci
# luci_admin init
# service luci restart
3) Set up HA LVM. HA LVM ensures that only 1 server will access the LVM at a time.
On the active R710:
 edit /etc/lvm/lvm.conf and edit locking_type to be 1
 Create an LVM using the mpath device names from multipath –ll output
FOR NSS-HA Medium
# pvcreate /dev/mapper/mpath2 /dev/mapper/mpath3;
# vgcreate DATA_VG /dev/mapper/mpath2 /dev/mapper/mpath3
# lvcreate -i 2 -I 1024 -l 100%FREE DATA_VG -n DATA_LV
FOR NSS-HA Large
# pvcreate /dev/mapper/mpath2 /dev/mapper/mpath3 /dev/mapper/mpath4
/dev/mapper/mpath5
# vgcreate DATA_VG /dev/mapper/mpath2 /dev/mapper/mpath3
/dev/mapper/mpath4 /dev/mapper/mpath5
# lvcreate -i 4 -I 1024 -l 100%FREE DATA_VG -n DATA_LV
 lvdisplay should show DATA_LV
 Edit /etc/lvm/lvm.conf and change the volume list to
volume_list = [ “VolGroup00” , “@active” ]
where VolGroup00 is the volume group that contains the “/” file system for the OS.
“active” is the name of the server as defined in the cluster.conf file that will be used
for the cluster configuration.
 Remake the initrd
# mkinitrd -f /boot/initrd-2.6.18-194.el5.img 2.6.18-194.el5