Re: Subject: Re: upgrade OL6 tot OL7 within Cluster

RE: "without too much customization"

This is the killer! If you are only using packages off the main distro repository, you might be fine. When you start using packages from other repositories, things can get tricky. With Fedora, I've had to manually remove packages (Chrome, EPEL packages etc.) to hand-hold it through...

Cheers

Tim...

On Fri, Dec 18, 2015 at 5:28 PM, Jeremy Schneider <jeremy.schneider_at_ardentperf.com> wrote:
> On Fri, Dec 18, 2015 at 12:18 PM, Jeremy Schneider
> <jeremy.schneider_at_ardentperf.com> wrote:
>> Oh yeah, I heartily agree. In-place upgrades are a brand new feature
>> of RH7 and notoriously complex for any Linux distribution. I've done
>> in-place upgrades of Ubuntu and Debian - and the list of possible
>> problems and bugs in the upgrade process is always long.
>
> Here's a concrete example:
>
> I once did an in-place upgrade to Ubuntu 14.04 and in the middle of
> the upgrade the system unexpectedly and completely lost power. I tried
> to troubleshoot. For starters, the half-upgraded operating system
> wasn't even bootable. Admittedly there's a lot I don't know about
> Ubuntu - but try to salvage the upgrade proved to be so complex that
> in the end it seemed easier to just scrap all the data and install
> from scratch onto the system, then just pull the data from backups.
> (We did have good backups from before we started the upgrade process.)
>
> I'm sure RedHat has tested their in-place upgrade process extensively.
> And if you're doing a normal upgrade of a system without too much
> customization and if nothing unexpected happens, then I'm sure you'll
> be fine. It's the edge cases that get you - customization, unexpected
> interruptions, etc.
>
> -J
>
> --
> http://about.me/jeremy_schneider

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