Kubernetes Tutorial (original) (raw)

**Kubernetes is an open-source container management platform that automates the deployment, management, and scaling of container-based applications in different kinds of environments like physical, virtual, and cloud-native computing foundations. In this Kubernetes Tutorial, you are going to learn all the basics to advanced concepts of Kubernetes like **Kubernetes service, **Kubernetes cluster construction, **Kubernetes deployment, **Kubernetes Architecture, etc.

For those aiming to deepen their expertise in managing containerized applications and orchestration, consider exploring our AWS Solutions Architect Certification Training Program . This expert-led training complements the knowledge acquired in this tutorial by providing practical, hands-on experience with Kubernetes.

Kubernetes

Containers are isolated from each other so that multiple containers can run on the same machine without interrupting anyone else. It allows us to deploy and manage container-based applications across a Kubernetes cluster of machines.

Table of Content

Prerequisites for this Kubernetes Tutorial

Before start learning Kubernetes, it is important to have a solid understanding of certain concepts and technologies. Here are some prerequisites:

Basics of Kubernetes

Kubernetes Basics will teach you how to manage these "containers" effectively. Kubernetes is like a ship captain for these containers, organizing and placing them on multiple computers (like a ship carrying many containers). This introduction will explain key Kubernetes ideas like Pods, Services, and Deployments. You'll learn how Kubernetes keeps your containerized applications running smoothly and efficiently

Advanced Kubernetes

In this Advanced Kubernetes section we will understand how to manage complex containerized applications. If started learning this section it means you are familiar with Kubernetes basics and explores powerful features for scaling, security, and automation. Here we will start advanced concepts like deployments with rollbacks and health checks, advanced networking configurations for service communication, and tools for managing storage and persistent data for your containerized applications.

Why do we need Kubernetes?

There are several reasons to learn Kubernetes like easy scaling of applications, self-healing, portability, and automation. It is very helpful for running microservices and distributed systems.

**For example : You have a couple of applications to deploy so, you can package it into a container and run it on a server containing a Docker engine or any other container engine. You package the application into a container using a Docker file and host it on a port for the external world to access it.

But there is a drawback is that it is only running on a single server so, if at that point any failure occurs it becomes an application failure, to handle the single point of failure google introduced Kubernetes to scale applications.

Kubernetes Architecture

Below you will find the image that describe the architecture of Kubernetes.

kubernetes

Features of Kubernetes

Kubernetes has many useful features that help run and manage containers on different machines. It makes it easier to control Kubernetes (K8s) clusters, and helps use computer resources more efficiently. Some important features include:

1. Persistent Storage

Kubernetes enables persistent storage means your data is saved even if you stops or restarts your container. It enables dynamic storage which means you can add storage automatically when needed. For example, If you are working on an application and your application needs more space then Kubernetes can connect it to extra storage without stopping your application.

2. Load Balancing

Kubernetes use load balancing to manage high demand traffic because of this your applications runs smoothly. Kubernetes provides both internal and external load balancing. This avoid overloading and make sure that users always reach a working application.

3. **Efficient Resource Utilization

Kubernetes helps you to use hardware resources like CPU, memory and storage in a smart manner. It places containers on different machines so that no single machine gets overloaded which improves performance and saves money by using resource more effectively.

4. **Resilience and Self-Healing

Kubernetes helps keep your application running even if something goes wrong. It can automatically place containers on healthy machines, restart them if they crash, make copies (replication) to handle more users, and adjust the number of containers based on demand (scaling). All of this helps your app fix itself and stay available without needing manual help.

5. **Auto-Scaling

Kubernetes automatically scale up or down your resources according to your demand. This means that you can adjust the number of containers according to your need. This ensures that your applications always have the resources they need without manual intervention.

6. **Consistency Across Environments

Kubernetes lets you describe your application using code, so it works the same in every environment like development, testing, and production. This reduces problems when moving apps between stages and makes the software delivery process faster and smoother.

Advantages of Kubernetes

Kubernetes offers numerous advantages, some of the key benefits include:

**1. Container Orchestration

Kubernetes helps you to manage containerized applications automatically. It takes care of starting, stopping, and updating containers without any need from your end to do everything manually. This makes it easy to run applications smoothly and update them without downtime.

**2. Scalability

Kubernetes works on horizontal scaling means it can grow or shrink your application based on how much traffic it gets. For example, if more people use your application, it can automatically add more containers to handle the load. When traffic is low, it can remove the extra containers to save resources and costs.

**3. High Availability

Kubernetes checks your apps regularly to make sure they are working. If one part of your app stops, Kubernetes can fix it or replace it. This keeps your app running and reduces the chances of downtime.

4. Fault Tolerance

If any fault come in your production and container fails Kubernetes automatically restarts the app or moves it to a working machine. This helps your application continue running even if something breaks.

**5. Flexibility

Kubernetes works in different environments. You can run your apps easily on public clouds like AWS, Google Cloud, or Azure, as well as on your own private cloud or data center. Kubernetes also makes it simple to switch between these providers, so you are not stuck using only one.

**6. Resource Efficiency

Kubernetes uses system resources like CPU and memory wisely. It places containers in a way that makes the best use of your hardware. This helps reduce costs by not wasting any resources.

**7. Automated Operations

Kubernetes makes your complex tasks simple like setting up networks, connecting storage, and balancing traffic between services. It uses automation and simple code instructions (called declarative APIs) to make operations faster and easier.

Conclusion

This tutorial gives a clear and complete introduction to Kubernetes. It explains what Kubernetes is, how it started, its main features, and how it helps run container-based applications. We also talked about how to install Kubernetes, use its APIs, and build a cluster. Whether you are a beginner or have some experience, this tutorial will help you understand how to use Kubernetes. It is a very popular tool in the tech world and is widely used to manage apps in real-life (production) systems.

Keep learning and trying things out with Kubernetes to see how much it can do!