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cubecos
Version: 2.4

Compute node (HCI) removal Guide

Remove Compute node from cluster​

Stop the compute host​

Goto Admin > Compute > All Hypervisors and click Compute host tab. Look for the hostname you wish to remove and click on button DISABLE SERVICE

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

Disable service​

Leave a reason and click DISABLE SERVICE /assets/maintenances/02-disable-1.png

Service Disabled​

Make sure the service is disabled /assets/maintenances/03-disable-1.png

Migrate Instances from disabled host​

Goto Admin > Compute > Instances, look for the instances which is hosted on DISABLED Host and start the LIVE MIGRATE INSTANCE from the action menu

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

Allocate the instance to new host​

You can choose a preferred host to migrate or Automatically and SUBMIT /assets/maintenances/05-live-migrate-1.png

All instances has been migrated​

Repeat the steps and migrate the rest of the Instances

/assets/maintenances/06-live-migrate-1.png

Connect to 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: 3
    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​

Goto Admin > Compute > All Hypervisors and click Compute host tab. Host compute03 has been removed from the Cluster

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