Repurpose a CubeCOS node
Some would like to retire some compute nodes with outdated specs and transform them into storage nodes. There are two recommended procedures for such use case.
Simple Recycling​
Stop a Compute Node​
Navigate to Admin > Compute > Hypervisors. Look for the hostname you wish to remove and click on button DISABLE.
Disable Service​
Leave a reason and click DISABLE SERVICE.
Service Disabled​
Make sure the service is disabled.
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.
Allocate the Instance to a New Host​
You can choose a preferred host to migrate or Automatically and OK.
All Instances Has Been Migrated​
Repeat the steps and migrate the rest of the instances.
Done​
The node is now serving as a storage node.
Complete Recycling​
Preparation​
Please follow the process to stop a compute node and migrate instances to another compute node.
Remove Disks​
The action is required if only the node is included in the storage.
CLI: storage > remove_exist
Remove the Compute Node from the Cluster​
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 node from the cluster.
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
Set Up the Storage Node​
It is now safe to shutdown the retired compute node.
After shutting down the compute node, we could boot the node from an installer.
Please follow the process for the installer to set up the storage node.