Snapshot volumes are the only thing that would not work (because there
is no cluster-aware snapshot implementation yet).
Other than that, all your volumes will convert just fine without
having to recreate, etc.
Once you've got the cluster infrastructure setup, all you need to do is:
*> setup cluster infrastructure
*> install lvm2-cluster
1> vgchange -an <volume group> # deactivate volumes
2> vgchange -cy <volume group> # set cluster attribute
3> vgchange -ay <volume group> # re-activate the volumes
brassow
On Jun 11, 2008, at 8:23 AM, Ron Cronenwett wrote:
Excellent, this answers most of what I was looking for.
Just one question, if I were to install CLVM, can the existing volume
group and logical volume be converted or would I need to recreate
everything and restore the data from a back up copy?
Thanks
Ron Cronenwett
On Wed, Jun 11, 2008 at 8:16 AM, Jonathan Brassow
<jbrassow@xxxxxxxxxx> wrote:
Here is a good source of information for those questions:
http://sources.redhat.com/cluster/wiki/LVMFailover
brassow
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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