What is Kubernetes ( KUBERNETES ) ?
Kubernetes is an open-source container orchestration system for deploying, scaling, and managing containerized applications.

It is called “Kubernetes”, “Kubernetes”, “K8s”, “Kube”, “Kuber”, “Cube” and is managed by the Cloud Native Computing Foundation (CNCF) under the Linux Foundation under the Apache License 2.0 license. do.
Kubernetes Evolution
Google created and operated more than 2 billion containers a week through a container technology called Borg.

Google has made Kubernetes an open source project based on the experience accumulated while developing and operating production workloads with containers for Borg, the source of Kubernetes, for 15 years.

Kubernetes started in June 2014 and released version 1.0 in July 2015, and now major cloud vendors such as Google, Amazon, and Azure, and software vendors such as Red Hat, IBM, and Oracle are distributing Kubernetes under their own brands. is providing.
Comparison of containers and Kubernetes
You can use Docker to start a container on your host, but if you want to use it in production, you should think about something like:

Multiple Host Management / Container Scheduling / Rolling Update / Auto Scaling (Auto Scale In/Out) / Container Lifecycle Monitoring, etc.

Operating a container-based system is not realistic unless you can manage and automate multiple containers.