If you are not familiar with the oc command, refer to OpenShift - Getting Started with the oc command.

I like to think of a machine as OpenShift representation of a Virtual Machine, such as an Amazon Web Services (AWS) EC2 Instance, or a VMWare Virtual Machine, and then a Node, and then the pods running on the node. Machine Configs can be used to configure the Virtual Machine Operating System, such as configuring a Linux systemd service such as sshd or chronyd or Network Manager.

There are different types of nodes.

• edge
• master
• worker

The oc label node command can be used to apply one or more labels to a node. In this example, label region=east is applied to the node named worker-c4v5h.

~]$ oc label node worker-c4v5h region=east
node/worker-c4v5h labeled

Or in the OpenShift console, at Compute > Nodes you can edit a nodes labels.

And the oc describe node command can be used to see the labels that have been applied to the node.

~]$ oc describe node worker-c4v5h
Name:               worker-c4v5h
Roles:              infra,worker
Labels:             region=east

Or in the OpenShift console, at Compute > Nodes you can view a nodes labels.

And here is how you can remove a label. In this example, the region label will be removed.

~]$ oc label node worker-c4v5h region-
node/worker-c4v5h labeled