Hi,

On Wed, Feb 20, 2008 at 11:19:24AM +0100, Adrian Chapela wrote:
> Hello,
>
> I have created a "homemade" mysql master/slave script and now I am testing 
> it. For now I think it is OK. I still continue testing it and for me I 
> think it is OK.
>
> The script control the state of servers with semaphore files because the 
> two servers are in Master/Master config but only one can be considered as 
> master.

Master/Master config is not multistate, so a regular resource
should suffice here. Or perhaps I didn't understand this
correctly.

> I have Mysql circular replication. With this configuration recovery 
> is more simple.
>
> If you want to test it, you can download from:
> http://code.adrianchapela.net/heartbeat/mysql_slave_master

Using status files can be tricky. Better to put them in
$HA_RSCTMP (/var/run/heartbeat/rsctmp) because this directory is
cleaned on heartbeat start.

> A small readme file with a simple example rule:
> http://code.adrianchapela.net/heartbeat/mysql_slave_master.README

>From the readme:

        This script has a attrd variable wich can set two values.

        Value 0: when the instance isn't a master

        Value 1: when the instance is a master.

The question is which instance? Or, more precisely, if there's
only one variable of a boolean kind, then you can determine if
there's a master but not which node is the master.

If you want to contribute the script, please talk to Alan.

Thanks,

Dejan

> Best regards.
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