Kubernetes: Master vs Worker

In Kubernetes there appears to be the concept of a master and a worker. Yet a colleague of mine who is very well acquainted with Kubernetes clarified that there is actually not really such thing as a master or worker in Kubernetes. Instead you have nodes that have certain components which make them "masters" or what is sometimes referred to as the control plain and you have "workers" which have other components.

A master or control plain node is one that contains the following components:

• etcd
• kube-apiserver
• kube-controller-manager
• kube-scheduler

These components allow the node to schedule which makes it a "master" node.

A worker node is one that contains:

• kube-proxy
• kubelet