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

Thu, 20 Nov 2008 10:50:13 -0800 

Dominik Klein escribió:

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?

It could be a problem with pingd again, I couldn't see pingd updating 
the value.

I have attached hb_report.


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




Regards
Dominik

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