nutanix-cvm-ahv-maintenance-mode-1.jpg

Maintenance mode is crucial when performing hardware maintenance, software and firmware upgrades, and troubleshooting.

To ensure that a CVM will not be part of any active storage or metadata connection, enable maintenance mode in the CVM.

It is recommended to enable maintenance mode before a CVM is shutdown.

Connect to CVM via SSH (*exclude the CVM from entering maintenance mode) .

Check the Host ID:

svmips -d

10.110.5.148 -> 6
10.110.5.149 -> 7
10.110.5.150 -> 8
10.110.5.151 -> 9
10.110.5.179 -> 10
10.110.5.180 -> 11
10.110.5.181 -> 12
10.110.5.182 -> 13

e.g. Place the HCIVMS05's CVM into maintenance mode status:

ncli host edit id=10 enable-maintenance-mode=true

Refer to "Nutanix CVM IP Allocation:(Sample)", and found that id is 10.

Check Nutanix CVM maintenance mode status to execute the following command:

ncli host ls 

Id : 00059358-35f2-ead3-4091-1234567890ab::10
Uuid : 9ca26d70-ba56-4166-931e-1234567890ab
Name : HCIVMS05
IPMI Address : 10.110.6.69
Controller VM Address : 10.110.5.179
Controller VM NAT Address :
Controller VM NAT PORT :
Hypervisor Address : 10.110.5.144
Hypervisor Version : VMware ESXi 6.7.0 build-17167734
Host Status : NORMAL
Oplog Disk Size : 352 GiB (377,957,122,048 bytes) (1.7%)
Under Maintenance Mode : ture (AOS upgrade)
Metadata store status : Metadata store enabled on the node
Node Position : Node physical position can't be displayed for this model. Please refer to Prism UI for this information.
Node Serial (UUID) : JXXXXXXX
Block Serial (Model) : JXXXXXXX (HX3321

If the parameter Under Maintenance Mode is set to True for the node where the services are up.

PowerOff the specified CVM:

ssh 10.110.5.179 'cvm_shutdown -P now'

Turn on CVM after all software, hardware, and firmware activities are complete.
From one of the other CVMs run the following command to remove Nutanix CVMs from maintenance mode:

ncli host edit id=10 enable-maintenance-mode=false

Verify that the CVM is in maintenance mode status:

ncli host ls 

Id : 00059358-35f2-ead3-4091-1234567890ab::10
Uuid : 9ca26d70-ba56-4166-931e-1234567890ab
Name : HCIVMS05
IPMI Address : 10.110.6.69
Controller VM Address : 10.110.5.179
Controller VM NAT Address :
Controller VM NAT PORT :
Hypervisor Address : 10.110.5.144
Hypervisor Version : VMware ESXi 6.7.0 build-17167734
Host Status : NORMAL
Oplog Disk Size : 352 GiB (377,957,122,048 bytes) (1.7%)
Under Maintenance Mode : false (AOS upgrade)
Metadata store status : Metadata store enabled on the node
Node Position : Node physical position can't be displayed for this model. Please refer to Prism UI for this information.
Node Serial (UUID) : JXXXXXXX
Block Serial (Model) : JXXXXXXX (HX3321

Verify if the parameter Under Maintenance Mode is set to False for the node where the services are down.

How to enable or disable the Nutanix CVM maintenance mode for ThinkAgile HX - Lenovo Support ZA