Recently, I was attempting to place a ESXi host into maintenance mode via the GUI in vCenter. However, it kept failing even after i restarted services and rebooted the vCenter. This forced me to break out some old commands to perform this task via CLI on the ESXi host itself.
Confirm the host is not in maintenance mode already:
#localcli vsan cluster get
Place the host into maintenance mode:
#esxcli system maintenanceMode set –enable true -m ensureObjectAccessibility
**I put ensure object accessibility because I don’t want data moving around
When the time comes to take host out of maintenance mode:
#esxcli system maintenanceMode set –enable false
Three simple commands to bypass the GUI & place a host into maintenance mode. For your experience VMWare engineer I know this isn’t anything new but you never know when you need to refresher. As always, I hope y’all found this useful.