[pca] Cluster, zones, noreboot.

[Filip Francis]

Hi there,


I have done already quit a few upgrades of sun clusters.
Can you give me some more details on what version off cluster + version 
off os.

Regards
Filip


On 07/13/10 11:52, David Stark wrote:
> Hi List.
>
> A bit off-topic, but PCA's involved, so I'm going to push my luck.
>
> We've got a number of Sun Cluster installs using (lots of) failover 
> zones and with no LiveUpgrade alt. boot space set up, which we need to 
> patch. If we were to patch the clusters node-by-node (including the 
> kernel patches that don't like zones being booted when they're 
> applied), the zones would fail over between the nodes and never get 
> patched themselves, and since kernel (and some other?) patches can't 
> be applied from inside zones we would end up in a situation where the 
> zones' patch databases are out of sync with the Global zone. I know 
> from very bitter experience that this is a Bad Thing, so to avoid that 
> we're currently bringing the clusters down to patch them. This 
> obviously isn't optimal - people expecting 100% uptime from the 
> clusters are naturally a bit annoyed at having their applications down 
> for several hours while we unleash the mighty PCA.
>
> So, to minimise downtime I'd like to apply the noreboot patches, say, 
> the night before, and have a more minimal patch run with the clusters 
> down. This brings me to the question:
>
> Has anyone ever had any problems with noreboot patches applied to live 
> systems? Any weirdness at all? I've patched plenty of test machines in 
> multi-user mode, but never busy production boxes - these are fairly 
> large Oracle and SAP environments for the most part.
>
> Anyone with experience patching Sun Cluster care to share any top tips?
>
> Cheers!
>
> Dave
>
>
>