[ILUG] (WAS desktoplinux..) now RHEL5 HA

[Conor Wynne]

On 19 Feb 2008, at 21:26, Conor Wynne wrote:

> On Feb 19, 2008 7:25 PM, John Moylan <john at nuatech.net> wrote:
> Hi Conor,
>
> Are you having any RHEL5 issues with CLVM? Maybe 5.1 has sorted these
> out, but 5.0 introduced some issues when that were not in 4.6 and may
> have been a side effect of taking some of the cluster code out of the
> Kernel.

Removing stuff from the kernel is a good idea.
What issues have you come across?

I don't remember the release we used in training, but I do remember  
getting frustrated as I couldn't figure out why my NFS wouldn't fail  
over.
For some reason, when using the GUI to manually failover, it just  
borked, but when I did it on the command line it worked.

Then when I re-tried from the luci, it magically worked again. Never  
figured out why as we were moving very quickly through labs.
It was for the RHCA storage course.

I have not experienced this on 5.1.

> Have not come across any issues to speak of, although I initially  
> couldn't get the cluster IP going, and a respawn of the daemons  
> magically fixed that. Only happened the once though. I also had not  
> setup the virtual machine fencing correctly, and once sorted, no  
> more woes. I noticed logs from each node stated they vm's were  
> rebooted as the cluster was not quorate, but I hardly noticed it  
> happened at all. I suspect the system was running low on resources  
> as I had lots of apps running.
>
> This is what should happen, as the cluster thinks that the other one  
> is overloaded, or not receiving keep alives (whatever the term is),  
> so reboots em!
>
> The box (and vm's) were updated to 5.1 prior to doing the cluster  
> configs. I tend to patch first, then config. I find 5.x vastly  
> better thn any previous incarnation. Conga simply rulez.
> very impressive bit of software. I need more RAM before I add more  
> services though. I really should have boughthat lttle dell server  
> with 4GB.
>
> J
>
> Conor.

Conor.