Hi Jim,

Two controllers are required to avoid single point of failure in high 
availability.

That check is there from the beginning, before SC absence allowed and SC 
roaming features.

I guess, your system is running with SC absence allowed feature.
When a cluster goes headless, you are actually losing high availability, and SC 
absence allowed feature is there only to prevent the cluster reboot, and to 
successfully recover the cluster when controller(s) comes back.

Thanks,
Zoran


-----Original Message-----
From: Carroll, James R [mailto:[email protected]] 
Sent: den 18 januari 2018 21:27
To: [email protected]
Subject: [users] question on IMM.xml validation checks

Hi all,

We are using OpenSAF 5.2, and have a question on one of the validation checks 
being performed by the opensaf utllity identified as immxml-clustersize.

We have a pre-existing design that has 1 System Controller, and several Payload 
nodes.    When we try to implement this for OpenSAF usage, it gets flagged as a 
validation error.  The script is making the following validation check:

  *   If (System_Controller_count < 2) and (Payload_Count > 0)
     *   Generate validation error
  *   Endif

Can anyone explain why this check is here?  Is this to meet some requirement 
imposed by the AMF Specifications?
As a workaround, we have removed this validation check from the script, to 
allow the file to be generated.
Does anyone see an issue with removing this check, and just allowing OpenSAF to 
run a single controller with multiple payloads?

Thanks.

Jim
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