What is Kubernetes ?

• Modern Application Needs:

  • Users demand applications to be accessible 24/7 without interruptions.
  • Developers aim to deploy updates and new versions multiple times daily to improve features and fix issues promptly.

• Containerization Benefits:

  • Packages software into isolated, portable units (containers).
  • Facilitates seamless release and updates of applications without causing downtime.

• Role of Kubernetes:

  • Manages the deployment, scaling, and operation of containerized applications.
  • Ensures applications run where and when required, optimizing resource allocation.
  • Supports applications in discovering necessary resources and tools to function efficiently.

• Why Kubernetes?:

  • A robust, open-source platform ready for production use.
  • Developed from Google’s extensive experience in managing containers at scale.
  • Integrates best practices and innovative ideas from the developer community to enhance reliability and scalability.

Why you need Kubernetes

Kubernetes provides you with a framework to run distributed systems resiliently. It takes care of scaling and failover for your application, provides deployment patterns, and more. For example: Kubernetes can easily manage a canary deployment for your system.

Kubernetes provides you with:

• Service discovery and load balancing Kubernetes can expose a container using the DNS name or using their own IP address. If traffic to a container is high, Kubernetes is able to load balance and distribute the network traffic so that the deployment is stable.
• Storage orchestration Kubernetes allows you to automatically mount a storage system of your choice, such as local storages, public cloud providers, and more.
• Automated rollouts and rollbacks You can describe the desired state for your deployed containers using Kubernetes, and it can change the actual state to the desired state at a controlled rate. For example, you can automate Kubernetes to create new containers for your deployment, remove existing containers and adopt all their resources to the new container.
• Automatic bin packing You provide Kubernetes with a cluster of nodes that it can use to run containerized tasks. You tell Kubernetes how much CPU and memory (RAM) each container needs. Kubernetes can fit containers onto your nodes to make the best use of your resources.
• Self-healing Kubernetes restarts containers that fail, replaces containers, kills containers that don't respond to your user-defined health check, and doesn't advertise them to clients until they are ready to serve.
• Secret and configuration management Kubernetes lets you store and manage sensitive information, such as passwords, OAuth tokens, and SSH keys. You can deploy and update secrets and application configuration without rebuilding your container images, and without exposing secrets in your stack configuration.
• Batch execution In addition to services, Kubernetes can manage your batch and CI workloads, replacing containers that fail, if desired.
• Horizontal scaling Scale your application up and down with a simple command, with a UI, or automatically based on CPU usage.
• IPv4/IPv6 dual-stack Allocation of IPv4 and IPv6 addresses to Pods and Services
• Designed for extensibility Add features to your Kubernetes cluster without changing upstream source code.