[Pacemaker] 4 servers; different resources on different servers?

[Dejan Muhamedagic]

Hi,

On Sun, Oct 02, 2011 at 10:20:34AM +0200, Tomasz Chmielewski wrote:
> I want to build a cluster of 4 servers (servers A, B, C, D), with
> different resources on them (mysql, webserver):
>
> webservers: A B C D
> mysql:      A B
>
>
> Is there a way to make Pacemaker/heartbeat to let assign MySQL IP *only*
> to servers A or B? Webserver IPs should be assigned to all servers (A,
> B, C, D).
>
> I.e. if server A dies, I want to be sure MySQL IP is assigned to server
> B, but not C or D.

Use negative location constraints:

location lname1 mysql-ip1 -inf: C
location lname2 mysql-ip1 -inf: D

Or similar. Alternatively, make your cluster asymmetric then add
positive location constraints. Whatever makes the configuration
smaller and/or easier to understand.

Thanks,

Dejan

> -- 
> Tomasz Chmielewski
> http://wpkg.org
>
>
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