[Linux-cluster] RHEL 4.5 -> 4.6 migration

[Paul n McDowell]

Well, in my case that was fairly easy.  We have hardware mirrored system 
disks (/, /usr, /var, /root, /opt.....) so prior to performing my 
upgrades, I migrated any services that were running on that node, quiesced 
the system and then broke the mirror.   I then brought the system back up 
with all the cluster services switched off, performed the upgrade and in 
each case the node then re-joined the cluster without a problem. 

I'm not familiar with version control that you can perform with "Wayback" 
but the principal would be the same, ie, keeping a known good OS version 
that you could fall back to in case of a problem.







gordan at bobich.net 
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01/11/2008 11:37 AM
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Re: [Linux-cluster] RHEL 4.5 -> 4.6 migration






I'm curious - please, do tell about the solid rollback plan. Something 
like the stackable wayback file system for root?

On Fri, 11 Jan 2008, Paul n McDowell wrote:

> I did a rolling upgrade of a 5 node GFS environment from 4.5 to 4.6 over 
a
> week and had no interoperability issues.  I made sure that I had a solid
> roll-back plan before I upgraded each node just in case.
>
>
>
>
>
> rhurst at bidmc.harvard.edu
> Sent by: linux-cluster-bounces at redhat.com
> 01/11/2008 10:36 AM
> Please respond to
> linux clustering <linux-cluster at redhat.com>
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> To
> linux-cluster at redhat.com
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>
> Subject
> [Linux-cluster] RHEL 4.5 -> 4.6 migration
>
>
>
>
>
>
> Has anyone migrated from an existing 4.5 to the newer 4.6 cluster suite?
> We would like to roll out 4.6 in our 11-node cluster, but only one node 
at
> a time, over the course of 2-weeks.  Does the two versions intermix well
> enough to do that?   Or do we need to do take some kind of special care 
or
> precaution, like when injecting this dilithium crystal chamber with an
> inverse tachyon pulse from the main deflector dish?
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