Re: [ClusterLabs] Fencing | Dummy questions

2019-03-13 Thread Klaus Wenninger 
On 03/13/2019 10:56 AM, Lopez, Francisco Javier [Global IT] wrote:
> Hello guys !
>
> I'm dealing since some time ago with this configuration:
>
> - Two node cluster.
> - Vmware boxes.
> - PostgreSql release 10.X: Master/Slave.
>
> On top of this I've set up Pacemaker/Corosync and RA/PAF.
>
> Now it's time to play with different fencing scenarios.
> I'd like to know from more experienced people about this. Based on the
> configuration I have (or similar)
> perhaps some of you can tell me, based on your experience, what kind
> of fencing sounds more appropriate,
> either node or resource level and based on what.
>
> Any quick reference would help me a lot.

Vmware being your hypervisor you can go
for fence_vmware_rest or fence_vmware_soap
as fence-agents.

That might depend on your distribution and
which fence-agent-styles are preferred/supported.

If you don't want fencing talking to your hypervisor
for whatever reason you might think of sparing a
shared disk (outside of your hypervisor or provided
by the hypervisor) and going with sbd (Sbd needs
a shared disk for useful deployments of 2-node clusters.
If you spare more virtual-nodes or deploy qdevice
that gives you 'real quorum' and sbd can be used
without a shared disk.).
As sbd is relying on a watchdog and Vmware doesn't
provide one you would have to go with softdog (software
emulation of a watchdog at least not relying on a
working userland) leaving you with somewhat reduced
reliability of the solution.

Depending on how your data is stored you might
in addition consider resource-fencing on the storage.

I'm aware that this doesn't give you an immediate solution
but I hope you'll find a few pointers to be able to
proceed.

Klaus
>
> I reviewed the threads and did not find any specific to this. I'd like
> to have this information to better
> understand what agents to install and manage.
>
> Thank you
> Javier
>
>
>
> Francisco Javier​     Lopez
>
> IT System Engineer |  Global IT
>
> O: *+34 619 728 249*    | 
> M: *+34 619 728 249*    | 
>   *franciscojavier.lo...@solera.com*
>   |  *Solera.com*
> 
>
> Audatex Datos, S.A.    | 
> Avda. de Bruselas, 36, Salida 16, A‑1 (Diversia)  ,   Alcobendas  
> , 
> Madrid,   28108   ,   Spain
>
>  
>
>
> 
>
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[ClusterLabs] Fencing | Dummy questions

2019-03-13 Thread Lopez, Francisco Javier [Global IT] 
Hello guys !

I'm dealing since some time ago with this configuration:

- Two node cluster.
- Vmware boxes.
- PostgreSql release 10.X: Master/Slave.

On top of this I've set up Pacemaker/Corosync and RA/PAF.

Now it's time to play with different fencing scenarios.
I'd like to know from more experienced people about this. Based on the 
configuration I have (or similar)
perhaps some of you can tell me, based on your experience, what kind of fencing 
sounds more appropriate,
either node or resource level and based on what.

Any quick reference would help me a lot.

I reviewed the threads and did not find any specific to this. I'd like to have 
this information to better
understand what agents to install and manage.

Thank you
Javier



Francisco Javier​   Lopez

IT System Engineer   |  Global IT

O: +34 619 728 249|  M: +34 619 728 
249|

franciscojavier.lo...@solera.com   
 |  Solera.com

Audatex Datos, S.A.  |  Avda. de Bruselas, 36, Salida 16, A‑1 
(Diversia),   Alcobendas  ,   Madrid  ,   28108   , 
  Spain


[cid:image309044.png@85A46B17.DD7465F2]






" Este e-mail y sus archivos adjuntos son confidenciales y están dirigidos 
exclusivamente a la(s) persona(s) destinataria prevista. Si ha recibido este 
mensaje por error, por favor, notifique inmediatamente al remitente y elimine 
este mensaje. La empresa no firma contratos por e-mail y todas las 
negociaciones están sujetas a la firma de un contrato por escrito.

This e-mail and any attached files are confidential and intended for the named 
addressee(s) only. If you have received this message in error, please notify 
the sender and delete the email immediately. The company does not conclude 
contracts by email and all negotiations are subject to written contract. "
___
Users mailing list: Users@clusterlabs.org
https://lists.clusterlabs.org/mailman/listinfo/users

Project Home: http://www.clusterlabs.org
Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf
Bugs: http://bugs.clusterlabs.org