What are the components of Kubernetes master and explain each component’s function?

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The Kubernetes master runs the Scheduler, Controller Manager, API Server and etcd components and is responsible for managing the Kubernetes cluster.

Etcd

EtcdĀ is a distributed, consistent key-value store used for configuration management, service discovery, and coordinating distributed work.

API Server

When you interact with your Kubernetes cluster using the kubectl command-line interface, we are actually communicating with the master API Server component.

Scheduler

The Scheduler watches for unscheduled pods and binds them to nodes via theĀ /bindingĀ pod subresource API, according to the availability of the requested resources, quality of service requirements, affinity and anti-affinity specifications, and other constraints.

Controller Manager

The Kubernetes Controller Manager is a daemon that embeds the core control loops (also known as ā€œcontrollersā€) shipped with Kubernetes.