Converting compute node to AFM node

Convert a compute node to a AFM node through backend CR.

Before you begin

Compute only node must be a part of the storage cluster. To upsize the node to the storage cluster, see Configuring nodes for management.
The Global Data Platform service must be healthy before you begin the node conversion process.

Procedure

Run the following command to provide a name of the node in the spec section > nodeToBeDesignatedAsAfm field of the storagemanager custom resource.

oc patch Scale storagemanager -n ibm-spectrum-fusion-ns --type='json' -p='[{"op": "add", "path": "/spec/nodeToBeDesignatedAsAfm", "value": "<compute-only_node_name>"}]'

Run the following command to verify whether the storagemanager custom resource field is updated with the provided node name:
```
oc get Scale storagemanager -n ibm-spectrum-fusion-ns -oyaml | grep nodeToBeDesignatedAsAfm
```
The progress can be tracked through the status field userDesignatedAfmNodeStatus on the storagemanager custom resource.
```
oc get Scale storagemanager -n ibm-spectrum-fusion-ns -oyaml | grep userDesignatedAfmNodeStatus
```
Example output:
```
userDesignatedAfmNodeStatus: IN-PROGRESS
```
After you successfully convert the node from Compute to AFM, the status of the userDesignatedAfmNodeStatus in the storagemanager custom resource displays as COMPLETED.
```
oc get Scale storagemanager -n ibm-spectrum-fusion-ns -oyaml | grep userDesignatedAfmNodeStatus
```
Example output:
```
userDesignatedAfmNodeStatus: COMPLETED
```
After you complete the node conversion process, the node name gets added to the designatedAfmNodes field in the status section.

Run the following command to obtain a list of all the converted nodes:

oc get Scale storagemanager -n ibm-spectrum-fusion-ns -o=jsonpath='{.status.designatedAfmNodes[*]}'

Run the following command to verify the role of the node:

oc get node <node_name> -oyaml | grep 'scale.spectrum.ibm.com/role'

Example command:

oc get node compute-1-ru10.rackae1.mydomain.com -oyaml | grep 'scale.spectrum.ibm.com/role'

Example output:

scale.spectrum.ibm.com/role: afm

Run the following command to verify whether the required taints are applied on the node.

oc get node <node_name> -o=jsonpath='{.spec.taints}'

Example:

oc get node compute-1-ru10.rackae1.mydomain.com -o=jsonpath='{.spec.taints}'

Go to the Global Data Platform page on the IBM Storage Fusion HCI System user interface and ensure that the node type displays AFM correctly.