I updated a vCenter server to 7.0.x when logging into the newly updated vCenter one host in the cluster state the following alert.
The KB didn’t sound promising. Checking the hosts event logs. a bunch of errors about /tmp ramdisk being full…
For real? Wow, not gettin’ lucky last couple weeks. Sure enough exact same issue, cleared /tmp temporality, and downloaded the patch. When I vMotion the VMs from this host onto another host the VMs themselves showed alerts.
I kept chugging alone in hopes I’d resolve each VM later. However as soon as I placed the issued host into maintenance mode, the alerts from all VMs disappeared. Applied to patch exactly as the HPE KB stated for the ESXi version it was on.
With luck on my side, the host came up clean, and came out of maintenance mode without an issue, and all error and alerts were resolved. Woooo!
Hope this helps anyone doing a vCenter upgrade to 7.x