OpenShift MachineSets

Creating a MachineSet to build and scale nodes on VMware 6.7U3 and OCP 4.6

Ref:
YouTube Video https://youtu.be/3no-WT557ls
OCP Documentation - https://docs.openshift.com/container-platform/4.6/machine_management/creating-infrastructure-machinesets.html

I usually recommend backing up a copy of one of your worker mainifest during install time to make this a bit easier, but you can use the templates found in the documentation to create your instance(s), per your environment.

Retrieve your unique infrastrutor id.
oc get -o jsonpath='{.status.infrastructureName}{"\n"}' infrastructure cluster
Edit (or Create) your MachineSet yaml.
vi 99_openshift-cluster-api_worker-machineset-0.yaml
In VMware, pay particutlar attention to the "workspace" section. In my video, I said that I did not have a "Resource Pool" so I had to remove that section. Otherwise the information will be what you completed as part of your install-config.yaml.
```
workspace:
  datacenter: <vcenter_datacenter_name> 
  datastore: <vcenter_datastore_name> 
  folder: <vcenter_vm_folder_path> 
  resourcepool: <vsphere_resource_pool> 
  server: <vcenter_server_ip
```
You also should include a label for your machine "role", here again I was using "infra" in the video. If you do not include a specific role, it will default to "worker".
```
spec:
    metadata:
    labels:
        node-role.kubernetes.io/<role>: ""
```

Verify your compute values...

diskGiB: 120
memoryMiB: 8192
numCPUs: 4
numCoresPerSocket: 1
network:
devices:
    - networkName: "<vm_network_name>"

and your template name... ie, the VM cloning source image name.

template: <vm_template_name>

Make sure your userDataSecret remains unchanged since it holds the ignition data.
```
userDataSecret:
name: worker-user-data
```
Install your MachineSet
oc create -f 99_openshift-cluster-api_worker-machineset-0.yaml
Access the UI and increment your # of Machines or set the replica value
Scale by OC...
a. View your machinesets
oc get machinesets -n openshift-machine-api
b. Scale the machineset
oc scale --replicas=${#} machineset ${machinesetname} -n openshift-machine-api

ocpdude/ocp-machinesets

OpenShift MachineSets