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



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


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