[Linux-cluster] RHEL cluster upgrade from v4.4 to v4.5

[Matthew B. Brookover]

I put U5 up on a couple of test systems, every thing seems to work.

There is an error generated by a new rc script lvm2-monitor.  From what
I can tell, the script tries to run a vgchange --monitor -y on all of
the volume groups.  Because LVM2 is set up in cluster mode, instead of a
list of volume groups vgs returns the error "WARNING: Falling back to
local file-based locking. Volume Groups with the clustered attribute
will be inaccessible." which the script feeds one word at a time to
vgchange.  Each word is fed as a volume group name, generating more
error messages, including the first one because the cluster, clvmd, etc
are not running.

The man page on vgchange says that --monitor controls where or not
dmeventd monitors mirrored logical volumes.  I do not have any mirrored
volumes so I will probably ignore this message and deploy U5 on my
production cluster.

The vgchange man page refers to mirror_image_fault_policy and
mirror_log_fault_policy in lvm.conf(5).  Unfortunately, lvm.conf(5) does
not list mirror_image_fault_policy or mirror_log_fault_policy.  There
does not appear to be a man page for dmeventd, I am curious what
dmeventd does.

Also, lvm2-monitor is invoked very early in the boot up cycle.  If you
are using iscsi, aoe, or gndb, lvm2-monitor will not see your storage
because iscsi, gndb and aoe are started much later in the boot cycle.

It looks like there is an open bugzilla on this issue:
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=239779 . If you are
using mirrored logical volumes you might want to check into it, also you
might also want to find out how to get lvm2-monitor to run after iscsi
starts up.

Matt


On Wed, 2007-05-16 at 23:39 +0200, Bob Marcan wrote:

> Hi.
> 
> Are there any issues with the upgrade (up2date) RHEL, CS and GFS
> from v4.4 to v4.5?
> 
> TIA, Bob
> 
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://listman.redhat.com/archives/linux-cluster/attachments/20070521/f648abba/attachment.htm>