Kubernetes, or container networking that is also known as k8s, is an open-source container network system. It automates application for scaling, management, and deployment.
Designed by Google, Kubernetes is presently maintained by the Cloud Native Computing Foundation. The aim is to automise the application containers across groups of host. Many cloud service providers use Kubernetes-based platform. These cloud service providers offer Kubernetes-based platform as IaaS (Infrastructure as service) or PaaS (Platform as service).
Kubernetes was founded by Brendan Burns, Craig McLuckie, and other Google engineers like Joe Beda, Brian Grant, and Tim Hockin. It was first announced in the mid of 2014 by Google.
The Kubernetes is highly influenced by the Borg system. The Borg System by Google acts as a cluster manager which runs thousands of jobs from various applications.
Many of the engineers who contributed to the Kubernetes also worked on the Borg system. The code name of Kubernetes was ‘Project seven of nine’.
The Borg system, which influenced the Kubernetes, was written in C++ language, but Kubernetes was written in Golang. The version 1 Kubernetes was launched on July 21st, 2015. At the same time, Google partnered with Cloud Native Computing Foundation (CNCF) of Linux and gave Kubernetes as a seed technology.
Kubernetes components doesn’t have any knowledge of other components and extend to meet different workloads. This platform has control over the compute and storage resources. These resources are also known as objects. Here are some of the key objects:
- Pods
It is a grouping container component of higher level. It has more than one container that can co-locate the host machine and resources. Each pod in Kubernetes has a pod IP address which helps applications to use pods avoiding confusion. A pod can also define a volume of local disk or a network. - Services
It is defined as a set of pods that function together. Two types of services are provided by the Kubernetes. The first type is environment variables, and the second type is Kubernetes DNS. A stable IP and DNS name is assigned by the service discovery. - Volumes
Kubernetes has a very short period of storage. In simple words, it’s volatile storage, restarting the pod will delete all the data. The Kubernetes volume provides storage for a lifetime. The storage is also used as disk space for containers.
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