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02-Kube-API-Server.md

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kube API Server

The Kube-apiserver the primary component of the control plane that is responsible for providing the kubernetes control and communication between master, worker & Cloud API server.

Kube-apiserver is responsible for:

  • Athentication
  • Authorization
  • Admission Control
  • Endpoint Management
  • Validation
  • Updating the Kube-scheduler
  • Updating the Kube-controller-manager

All the activity of the Kube-apiserver is stored ETCD in the form of key-value pairs. Also, kube-apiserver is only component that communicate with ETCD server

Kube-apiserver Installation.

Don't need to worry about this if you are using kubeadm or similar culster management tool.

Building it the hardway! (Good luck)

You can download the kube-apiserver binary from the release page

You need to choose the:

  • version
  • OS
  • Architecture

Or just

$ wget https://storage.googleapis.com/kubernetes-release/release/v1.13.0/bin/linux/amd64/kube-apiserver

Kube-apiserver Configuration

You can view the kube-apiserver configuration by running the following command:

$ kubectl get pods -n kube-system

or

$ cat /etc/kubernetes/manifests/kube-apiserver.yaml