Here’s an update on a previous blog post that I wrote last week.
The issue was that I had built a new one node Hyper-V cluster and VMM could not manage it. The error was:
“Warning (13926)
Host cluster <cluster FQDN> was not fully refreshed because not all of the nodes could be contacted. Highly available storage and virtual network information reported for this cluster might be inaccurate.
Recommended Action
Ensure that all the nodes are online and do not have Not Responding status in Virtual Machine Manager. Then refresh the host cluster again”.
I logged a call with Microsoft through IT Pro Momentum and here was the response:
“After confirmed this design with our product team, they told me that this feedback has already been reported to them, it’s really a problem, and they are considering to improve it in the future release of VMM, They are aware of this issue and are actively looking into it further. I’m sorry for the inconvenience brought to you now.
In the current release of VMM, There are also some workarounds you can take to “solve” this issue. One possible workaround that has been identified is to temporarily add a second node to the cluster at which point you are then able to bring it under management by VMM. While this is neither an ideal or long term solution, it has allowed other customers who have ran into this issue to move forward with their projects. Another workaround that I’ve found that will allow the ‘single node cluster’ scenario to complete is … once the Add Host process completes w/info and has the 13926 warning, change the cluster reserve value from 1 to 0, and then re-cycle the vmmservice. This should allow the host cluster to be added successfully in the console”.
There you go. It’s a bit late for me to test but the real world work around appears to be to change the cluster reserve value (cluster properties in VMM) from 1 to 0, and then recycle the VMM Service on the Hyper-V node. I’d tried the value change without the service restart which didn’t work. Hopefully this will help someone in the future.