Main Components
Kubernetes has the following main components:
Control Plane and worker nodes
Operators
Services
Pods of containers
Namespaces and quotas
Network and policies
Storage.
A Kubernetes cluster is made of a cp node and a set of worker nodes. The cluster is all driven via API calls to operators, both interior as well as exterior traffic. We will take a closer look at these components next.
Most of the processes are executed inside a container. There are some differences, depending on the vendor and the tool used to build the cluster.
When upgrading a cluster, be aware that each of these components are developed to work together by multiple teams. Care should be taken to ensure a proper match of versions.
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