I have a condo model cluster where I semi-regularly need to add nodes so I have 
a documented procedure. It is possible that other things in xCAT are already 
configured to allow these steps to work so it might be helpful to see the exact 
problems that you're seeing at your sites. One thing that I think is important 
for my specific nodeadd commands is that the hosts table must be setup with 
regular expressions to automatically assign IP addresses.

Here are the commands that I run:

For each node you'll be adding:

  nodeadd $HOSTNAME groups=$LIST_OF_GROUPS

End for loop

makehosts

makedns

makeconservercf - This one is probably not strictly required at this point, but 
it is on my list.

nodediscoverstart noderange=$HOST_RANGE

At this point power on each node in the range in order. I usually wait for each 
node to get past the BIOS POST before powering on the next one.

When you're done run nodediscoverstop

I hope this helps,

Mike Robbert


On 8/14/19 12:44, Jacob Bonek wrote:
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I would just like to second this. I’ve tried getting this to work in the past 
but with not a lot of luck.

From: Sam Davis <[email protected]><mailto:[email protected]>
Sent: Thursday, August 8, 2019 9:59 AM
To: xCAT Users Mailing list 
<[email protected]><mailto:[email protected]>
Subject: [xcat-user] Sequential Discovery

CAUTION: External Email
Hello,

    In the past, I've always had issues getting sequential discovery to work.  
I'm about to add 15 more nodes to our cluster and would prefer not to have to 
add them all manually. I normally fumble about with sequential for a while each 
time I add nodes before giving up. Does anyone happen to have a procedure they 
would be willing to share with me on how to properly perform sequential 
discovery?

Thanks,
    Sam




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