Dear Yong,
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[wrsroot@controller-0 ~(keystone_admin)]$ system host-power-off controller-0
Can not 'Power-Off' an 'unlocked' host controller-0; Please 'Lock' first
[wrsroot@controller-0 ~(keystone_admin)]$ system host-lock controller-0
controller-0 : Rejected: Can not lock an active controller.
[wrsroot@controller-0 ~(keystone_admin)]$
[wrsroot@controller-0 ~(keystone_admin)]$
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I don't know how to power off an active controller via VM?
There's no Instructions about VM.?
Thanks