CVMは通常の仮想VMとは特殊のため、以下の方法でシャットダウンしてください。

KB3270
https://portal.nutanix.com/#/page/kbs/details?targetId=kA0320000004H2NCAU

cvm_shutdown [OPTION]... TIME [MESSAGE]

Options:
-r reboot after shutdown
-h halt or power off after shutdown
-H halt after shutdown (implies -h)
-P power off after shutdown (implies -h)
-c cancel a running shutdown
-k only send warnings, don't shutdown
-q, --quiet reduce output to errors only
-v, --verbose increase output to include informational messages
--help display this help and exit
--version output version information and exit

注意 やってはいけない！："sudo shutdown" or "sudo reboot" はCVMのため使わないでください。