Skip to main content
cubecos
Version: 3.0

Compute Node (HCI) Removal Guide

Removing a compute node is typically due to failure, maintenance, or decommissioning. Ensure all workloads on the node have been migrated before removal. This operation will formally detach the node and its resources from the cluster.

Stop a Compute Host​

Navigate to Admin > Compute > Hypervisors. Look for the hostname you wish to remove and click on button DISABLE.

/assets/maintenances/01-disable-1.png

Disable Service​

Leave a reason and click DISABLE SERVICE.

/assets/maintenances/v3.0.0/02-disable-1.png

Service Disabled​

Make sure the service is disabled.

/assets/maintenances/v3.0.0/03-disable-1.png

Migrate Instances from the Disabled Host​

Navigate to Admin > Compute > Instances > Instances Detail, hover over More, and click the LIVE MIGRATE from the dropdown menu.

/assets/maintenances/v3.0.0/04-live-migrate-1.png

Allocate the Instance to a New Host​

You can choose a preferred host to migrate or Automatically and OK.

/assets/maintenances/v3.0.0/05-live-migrate-1.png

All Instances Has Been Migrated​

Repeat the steps and migrate the rest of the instances.

/assets/maintenances/v3.0.0/07-live-migrate-1.png

Connect to a Control Node​

$ ssh [email protected]
Warning: Permanently added '192.168.1.x' (ECDSA) to the list of known hosts.
Password:

Remove the Compute Node​

cc1> cluster
cc1:cluster> remove_node
1: compute01
2: compute02
3: compute03
Enter index: 1
this command is only applicable for compute or storage nodes
make sure its running instances have been properly terminated or migrated
shutdown the target host before proceeding
Enter 'YES' to confirm: YES

Results​

Navigate to Admin > Compute > Hypervisors and click Compute host tab. Host compute01 has been removed from the Cluster.

/assets/maintenances/07-live-migrate-1.png