On 09/09/2012 09:53 PM, Lars Marowsky-Bree wrote:
On 2012-09-09T13:30:36, Alberto Menichetti<albmeniche...@tai.it> wrote:
I've successfully configured and tested the stonith plugin
"external/vcenter"; but this plugin introduces a single point of
failure in my cluster infrastructure because it depends on the
availability of the virtual center (which is, in the customer
environment, a virtual machine).
It's not exactly a single point of failure, since you need two failures
for this to matter - the first failure being the one that causes the
fence, and a second one for the vcenter instance to be down at that
time.
Hi Lars,
thank you for the quick response.
Maybe SPOF is not the best definition, but when the vcenter is
unavailable the safety of my data is not guaranteed.
I was thinking to introduce an additional fencing device, to be used
when the virtual center is unavailable; is this a suggested
deployment?
The fecing device I'd like to use is sdb.
If you have a working SBD setup, you do not need the external/vcenter
plugin any more.
What about using 2 different fencing mechanisms?
Do you think it could introduce some problems in the cluster or is it a
suggested/supported solution?
I'd like to use external/vcenter as first choice and rely on sdb only if
the first stonith mechanism fails (for example, because of the vcenter
unavailability).
Regards,
Lars
Take care,
Alberto
--
TAI S.r.l.
Alberto Menichetti
Area Mercato - Ingegneria dei Sistemi
System Engineer
50141 Firenze - Via Pazzagli, 2
Voice: +39 055 42661 - Fax +39 055 4266356
56125 Pisa - Viale Gramsci, 12
Voice: +39 050 220221 - Fax: +39 050 24421
e-mail: alb.meniche...@tai.it
http://www.tai.it
-----------------------------------------------------------------------
COMUNICAZIONE AI SENSI LEGGE 196/03
Il presente messaggio di posta elettronica viene inviato al Vostro indirizzo
email, che abbiamo acquisito da Vostre Visite, da incontri commerciali, elenchi
di pubblico dominio, Vostre precedenti comunicazioni. Il Vostro dato in
questione e' in possesso di TAI S.r.l., che lo ha immagazzinato in formato
elettronico. Tali informazioni non saranno divulgate a terzi. Se desiderate
verificare, cancellare o modificare i dati in nostro possesso, inviate fax al
numero 0554266356.
_______________________________________________
Pacemaker mailing list: Pacemaker@oss.clusterlabs.org
http://oss.clusterlabs.org/mailman/listinfo/pacemaker
Project Home: http://www.clusterlabs.org
Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf
Bugs: http://bugs.clusterlabs.org
