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.
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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.