TOTD: No operating system was loaded on VMs after upgrade to vNext


You successfully upgraded cluster 2012 R2 to Windows Server Technical Preview (not recommended in productions until RTM) , VM’s configurations to new version without any errors and try to run VMs in cluster. In this case, you may notice VM switches to boot from PXE and “No operating system was loaded on Vms after upgrade fo vNext” error appears.

hv_vnext_cluster_error_configuratuion_version

Solution:

It’s all because of Secure Boot settings.

I have VMs with Windows Server inside so I get them and set required secure boot template:

Get-ClusterGroup|? {$_.GroupType -EQ "VirtualMachine"}|get-vm|Set-VMFirmware -SecureBootTemplate MicrosoftWindows

Note: for VMs with Linux OS which support secure boot you have to run

Set-VMFirmware vmname -SecureBootTemplate MicrosoftUEFICertificateAuthority

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