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Kubernetes master is the in charge of the cluster. Kuberenetes master should be of linux 64 based.
The K8’s master have 4 components. They are
1. api-server- Server of API’s. It contains all the APIs provided by K8s. It act as the front-end to the control panel, we access via REST API. Similar to ears in human body, it receive the requests
2. cluster store – All the requests / data stored in cluster store. etcd is the storage unit use by k8s. It is like brain in human body. There is only one cluster store in a master.
3. Controller Manager – It is manager of all the controllers. One controller is there for one item.
Controller never stops. If it stops K8s will be unstable. It runs in the loop. Eg: node controller(will check for nodes), end-point controller. It is like eyes in human body.
4. Kube scheduler – It is always watch api servers and assign work to nodes. It is like mouth in human body. There is only one kube-scheduler in a master.
