Do I risk any VM performance issues during vCenter VCSA upgrade from v6.5 to v6.7 on vSAN cluster?

[glab75]

Do I risk any VM performance issues during vCenter VCSA upgrade from v6.5 to v6.7 on vSAN cluster?  From my experience the only caveat of performing a vCenter upgrade is not being able to access the vCenter GUI for a limited time, but  VM's should continue to function during vCenter upgrade.  Just want to confirm this with the community.  If there is a high risk of affecting any CPU/MEM/Network/IO VM performance, I will opt to perform the upgrade during off-peak hours. 

Feedback appreciated.

regards...

[lucasbernadsky · Accepted solution]

Hi there!

You are absolutely right. You will lose vCenter management during the upgrade but everything will continue to run normally. Since all vSAN, NSX, HA runs in ESXi kernel, VMs won't be affected whatsoever.

I suggest you run the upgrade off-hours, with previous backup. Maybe you will need to reconnect some vCenter endpoints as NSX Manager, vROps, vRA, given that self signed certificates will change.

[glab75]

Super.  Thanks very much for your reply.  Appreciated.