How to add virtual fencing disk to KVM guest
Hi, I'm trying to installVeritas Storage Foundation Cluster File System HA 6.0.3 to 6 KVM RHEL guests. I installed RHEL6.4 and created 3 virtual fencing disks using qemu-img. I added them as SCSI disks to the node and did the vxdisksetup for them. Now when I tried to configure fencing, I get the error below. I'm wondering if anyone has installed cluster file system into KVM guest environment and could tell me how to add virtual fencing disks so that fencing configuration would be successful. This is what I tried on the KVM: <disk type='file' device='disk'> <driver name='qemu' type='raw' cache='none'/> <source file='/home/VM/VMImages/IOFencing1.img'/> <target dev='sda' bus='scsi'/> <shareable/> <alias name='scsi0-0-0-0'/> <address type='drive' controller='0' bus='0' target='0' unit='0'/> </disk> <disk type='file' device='disk'> <driver name='qemu' type='raw' cache='none'/> <source file='/home/VM/VMImages/IOFencing2.img'/> <target dev='sdb' bus='scsi'/> <shareable/> <alias name='scsi0-0-0-1'/> <address type='drive' controller='0' bus='0' target='0' unit='1'/> </disk> <disk type='file' device='disk'> <driver name='qemu' type='raw' cache='none'/> <source file='/home/VM/VMImages/IOFencing3.img'/> <target dev='sdc' bus='scsi'/> <shareable/> <alias name='scsi0-0-0-2'/> <address type='drive' controller='0' bus='0' target='0' unit='2'/> </disk> Here is how the disks look like: [root@node1 installsfcfsha601-201605190528YQa]# vxdisk -o alldgs list DEVICE TYPE DISK GROUP STATUS disk_0 auto:cdsdisk - - online disk_1 auto:cdsdisk - - online disk_2 auto:cdsdisk - - online disk_3 auto:none - - online invalid disk_4 auto:none - - online invalid vda auto:none - - online invalid [root@node1 installsfcfsha601-201605190528YQa]# [root@node1 installsfcfsha601-201605190528YQa]# cat /etc/vxfentab # # /etc/vxfentab: # DO NOT MODIFY this file as it is generated by the # VXFEN rc script from the file /etc/vxfendg. # /dev/vx/rdmp/disk_0 QEMU%5FQEMU%20HARDDISK%5FDISKS%5Fdrive-scsi0-0-0-0 /dev/vx/rdmp/disk_1 QEMU%5FQEMU%20HARDDISK%5FDISKS%5Fdrive-scsi0-0-0-1 /dev/vx/rdmp/disk_2 QEMU%5FQEMU%20HARDDISK%5FDISKS%5Fdrive-scsi0-0-0-2 [root@node1 installsfcfsha601-201605190528YQa]# The error I get: kernel: I/O Fencing DISABLED!VXFEN INFO V-11-1-35 Fencing driver going into RUNNING state kernel: GAB INFO V-15-1-20032 Port b closed kernel: GAB INFO V-15-1-20229 Client VxFen deiniting GAB API kernel: VXFEN INFO V-11-1-36 VxFEN configured at protocol version 30 kernel: GAB INFO V-15-1-20230 Client VxFen inited GAB API with handle ffff8803b8288ac0 kernel: GAB INFO V-15-1-20036 Port b[VxFen (refcount 2)] gen 93aa25 membership 0 kernel: GAB INFO V-15-1-20038 Port b[VxFen (refcount 2)] gen 93aa25 k_jeopardy ;12345 kernel: GAB INFO V-15-1-20040 Port b[VxFen (refcount 2)] gen 93aa25 visible ;12345 kernel: VXFEN WARNING V-11-1-12 Potentially a kernel: preexisting split-brain. kernel: Dropping out of cluster. kernel: Refer to user documentation for kernel: steps required to clear preexisting kernel: split-brain.
