[Techtalk] Accessing a LUN From Multiple Linux Systems

[Joana Botto]

On Mon, Jun 15, 2009 at 1:59 AM, Gayathri
Swaminathan<gayathri.swa at gmail.com> wrote:
> Heya,
>
> On Sun, Jun 14, 2009 at 5:51 PM, Joana Botto <joana.botto at gmail.com> wrote:
>>
>> Hi all,
>>
>> I didn't have the chance yet to try the crossover cable, because the
>> serves are in a datacenter and it would be weird for me to go there on
>> a weekend, I try to look like having a normal and healthy social life
>> =)
>
> Good to have that work/life balance :)
>
>>
>> Each server creates its own cluster with the same name and tries to
>> fence the other. Meanwhile I lost one of them with my remote
>> experiments.
>>
>> /var/log/messages shows repeatedly these messages:
>>
>> Jun 14 23:15:16 BLALMS02 fenced[5479]: fencing node "BLALMS08.EXAMPLE.COM"
>> Jun 14 23:15:16 BLALMS02 fenced[5479]: fence "BLALMS08.EXAMPLE.COM" failed
>> Jun 14 23:15:21 BLALMS02 fenced[5479]: fencing node "BLALMS08.EXAMPLE.COM"
>> Jun 14 23:15:21 BLALMS02 fenced[5479]: fence "BLALMS08.EXAMPLE.COM" failed
>
> Ok, this confirms blalms08.example.com getting fenced and not being in the
> domain yet.  The rest of outputs verify/confirm the same. On both nodes acpi
> soft-off is disabled - yes? It is disabled with,
>
> chkconfig --level 2345 acpid off (or) by editing /etc/grub/grub.conf kernel
> line you have "acpi=off" at the end.
>
> Also can you get us output of,
>
> cat /etc/redhat-release; rpm -qa | grep cman
>
> Want to make sure if you are not running into a bug prior version of cman.
>
>> My problem might be very simple but my experience with clusters is
>> less than a week.
>>
>
> Oh don't worry about being just less than a week. Often find that breaking
> is much needed before learning :)
>
> --
> Gayathri Swaminathan
> gpgkey: 3EFB3D39
> Volunteer, FDP
>

Hello,

Both servers are now up. acpid was on, I disabled it.

cman version on BLALMS02 is cman-2.0.84-2.el5
cman version on BLALMS08 is cman-2.9.98-1.el5

One of the IP engineers enabled portfast on the switch this morning.
Both servers were rebooted but they're still trying to fence each
other, even after unsuccessful trying to manually fence them.


Joana