[Pacemaker] Unnecessary shuffling of master/slave resources and maybe a split brain

[Dominik Klein]

Adrian Chapela wrote:
> Dominik Klein escribió:
>>> What are you saying me ? I should have another communication channel 
>>> as a COM port... I could test this with a null modem cable.
>>
>> You need at least 2 connections between the nodes. It never was 
>> different.
>>
>> It once was true that a null modem oder serial cable as the second 
>> connection was enough - from my _personal_ experience, having 2 
>> ethernet connections is better (because faster and able to cope with 
>> the rather high traffic of v2 (pacemaker)).
> I tested two options. I think the best option is a second ethernet card. 
> I have configured this option but I saw that my cluster didn't do a 
> failover.
> The two connections are in different networks (One in 192.168.18.X and 
> other in 172.16.1.0) but I don't know why pingd isn't going down all of 
> resources.
> 
> I have this connectivity constraint:
>        <rsc_location id="mail-connectivity" rsc="Mail-drbd">
>                <rule id="mail-pingd-prefer-rule" score="-INFINITY" 
> role="Master">
>                        <expression id="mail-pingd-prefer" 
> attribute="pingd" operation="lt" value="1000"/>
>                </rule>
>        </rsc_location>
> 
> 
> 
>        <rsc_location id="samba-connectivity" rsc="Samba-drbd">
>                <rule id="samba-pingd-exclude-rule" score="-INFINITY" >
>                        <expression id="samba-pingd-exclude" 
> attribute="pingd" operation="lt" value="1000"/>
>                </rule>
>        </rsc_location>
> 
> And this colocation:
> <rsc_colocation id="mail_drbrd_rule" rsc="Mail" with-rsc="Mail-drbd" 
> with-rsc-role="Master" score="INFINITY"/>
> <rsc_colocation id="samba_drbrd_rule" rsc="Samba" with-rsc="Samba-drbd" 
> with-rsc-role="Master" score="INFINITY"/>
> 
> The node lost connectivity with 192.168.18.0 (I defined all host in 
> this  network for pingd) and pingd value should be less than 1000.

Should be or is?

Could you post your xml including the status section in this situation?

Regards
Dominik