Defined Kubernetes in Gaurav Arora Words.

DevOps
Posted on | by anil

MOTOSHARE 🚗🏍️
Turning Idle Vehicles into Shared Rides & Earnings

From Idle to Income. From Parked to Purpose.
Earn by Sharing, Ride by Renting.
Where Owners Earn, Riders Move.
Owners Earn. Riders Move. Motoshare Connects.

With Motoshare, every parked vehicle finds a purpose. Owners earn. Renters ride.
🚀 Everyone wins.

Start Your Journey with Motoshare

What is Kubernetes ?

  • Kubernetes is borned by Google
  • It is Open Source platform
  • It is cncf product
  • It overcomes challenges like scalability challenges
  • We can run 1000 computers via Kubernetes
  • It can help running multiple container with same port.
  • It will resolve auto healing in case of any failure
  • It solve networking challenge also
  • It will help managing multiple docker host

Why Kubernetes ?

  • It helps to run multiple docker container
  • it worked in desired state
  • Speed of deployment is faster and improved
  • It recover quickly
  • It helps in hiding complexity in Cluster
  • it helps in doping backup automatically
  • It is Secret and Configuration management
  • It is self healing and quickly recover in few seconds
  • It apparently enhances productivity
  • It lower overhead as everything will be managed by Kubernetes itself.
  • It increased portability feature.
  • It improved security
  • It is immutable means you will not get same pod

How Kubernetes works ?

Kubernetes basically consists of Cluster Store , Scheduler , Controller and apiserver.

Apiserver manages everything front end to the control plane , It exposes Restful API’s and consumes JSON. Can do CRUD operations and updated etcd also.

Cluster Store is persistent storage of K8 and uses etcd for distributed , consistent and watchable . It basically stored everything on Cluster and basically it is the source of truth.

Controller is managing everything as of node controller , endpoints controller and namespace controller.

Scheduler keeps watching apiserver for new Pods . After it , assigns work to nodes , contraints and resources.

What is POD ?

  • Pod is atomic Unit of Scheduling
  • It is running in worker node
  • It may be in single container or multiple container
  • It can only be instantiated by Kubelet
  • It Got IP addresses from kube-proxy
  • it is your unit of scheduling
  • If we have 2 Pod in same container , it is known as Loose coupling
  • If we have multiple Pod in same container , known as Tight coupling
  • POd lifecycle starts from Pending –> Running —> Succedded/ failed
  • It totally depend on Container , if it is running it should run otherwise stopped.