Deploying vCenter Server Appliance 6.0 and run into this beauty,
‘Progress Controller: [VCSA ERROR] – Progress callback error’
Turns out the vCenter Server Appliance installer will fail if more than one DNS server is provided. Fantastic…
To workaround, provide one DNS server IP during the installation wizard. Once the VCSA is installed and running you can then provide the secondary DNS IP.
Encountered the same error while upgrading vCenter to 7.0 from 6.5.
Your trick worked like a charm. Thanks