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Old 09-17-2008, 03:24 PM
"Johan Booysen"
 
Default Red Hat updates

I'm wondering what the general consensus is about applying Red Hat
updates to production systems.



Apart from the issue I've seen in the list where the update process
replaces some people's config files, do you generally think it is safe
to just apply updates and trust that nothing will be broken (broadly
speaking)?



I know it's probably best to apply the updates to a test lab machine
that's configured the same as the production machines, and I can do that
for *almost* all our servers. But there's always one or two that don't
follow the "standard" pattern so they are a case of hoping for the best.



Just wondering what you think, and any advice would be appreciated.



Thanks.

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Old 09-17-2008, 03:49 PM
mark
 
Default Red Hat updates

Johan Booysen wrote:
> I'm wondering what the general consensus is about applying Red Hat
> updates to production systems.
<snip>
> I know it's probably best to apply the updates to a test lab machine
> that's configured the same as the production machines, and I can do that
> for *almost* all our servers. But there's always one or two that don't
> follow the "standard" pattern so they are a case of hoping for the best.

Well, the real thing you're looking at is whether the updates will break
something. *If* the non-standard production machines don't have non-standards
versions of what you're updating, such as if they're using a built-from-source
php or mcrypt, rather than installed-binary-from-rpm, then you should be ok.

mark

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Old 09-18-2008, 08:02 AM
"Erling Ringen Elvsrud"
 
Default Red Hat updates

On 9/17/08, Johan Booysen <johan@matrix-data.co.uk> wrote:
> I'm wondering what the general consensus is about applying Red Hat
> updates to production systems.

This presentation is useful:
http://stahnma.fedorapeople.org/summit/updates.odp

> Apart from the issue I've seen in the list where the update process
> replaces some people's config files, do you generally think it is safe
> to just apply updates and trust that nothing will be broken (broadly
> speaking)?

In my opinion no. Your patching approach depends on how critical
downtime of your systems are, security policies / how exposed the
systems are from possible threats, the resources you have available
(time / money), the amount of redundancy you have (cluster, patch one
leg at a time), etc. The presentation above may help you getting
started. RH has a whitepaper that also may be useful:

http://www.redhat.com/apps/webform.html?event_type=whitepaper&eid=341


Best regards,

Erling Ringen Elvsrud

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