[Linux-cluster] Create Cluster using existing LVM on shared storage

Jonathan Brassow jbrassow at redhat.com
Wed Jun 11 12:16:33 UTC 2008

Here is a good source of information for those questions:


On Jun 10, 2008, at 7:12 PM, Ron Cronenwett wrote:

> Hi all,
> I have been presented a pair of servers (RHEL 5.2) connected to a dual
> port scsi array. The storage has been configured as one large disk
> partitioned into /dev/sdb1 /dev/sdb2,and /dev/sdb3 with dev/sdb3 the
> sole device in a physical volume. Several logical volumes have been
> created on the physical volume. Currently the logical volumes are
> mounted on server A. Server B was added to the mix as a new server.
> Server B sees the external storage with fdisk -l and the volumes with
> pvdisplay.
> My questions are, can an existing logical volume be used as a cluster
> resource that is mounted on one node or the other (but not both)?
> Would this work with just the existing LVM or would CLVM be needed? If
> I need CLVM, can the existing logical volumes be used without
> destroying the existing data?  In either case, would all the logical
> volumes need to be mounted on the same server or can just one logical
> volume be mounted on one server while the remaining logical volumes
> are mounted on the other?
> The idea is to create an active-passive HA cluster of an existing  
> web server.
> Any thoughts, ideas, comments, questions would be appreciated.
> Thanks
> Ron Cronenwett
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