☸️ Kubernetes: Introduction Tutorial

Welcome to the Kubernetes introduction tutorial! Kubernetes is a powerful open-source platform designed to automate the deployment, scaling, and management of containerized applications. In this guide, we'll cover the fundamentals of Kubernetes, including its key features, installation, and basic commands to help you get started.

🤔 What is Kubernetes?

Kubernetes (often abbreviated as K8s) is an open-source container orchestration platform that simplifies the management of containerized applications across clusters of machines. It automates many tasks involved in deploying and managing applications, including scaling, load balancing, and failover.

🌟 Key Features

Automated Scaling: Adjusts the number of running containers based on demand.
Self-Healing: Replaces failed containers and restarts them as necessary.
Service Discovery and Load Balancing: Automatically exposes services and manages load balancing.
Storage Orchestration: Manages storage resources for containers, allowing them to use storage solutions easily.

🛠️ Installation

For Linux (Using Minikube)

Install Minikube:

curl -LO https://storage.googleapis.com/minikube/releases/latest/minikube-linux-amd64
sudo install minikube-linux-amd64 /usr/local/bin/minikube

Start Minikube:

minikube start

Verify Kubernetes Cluster:
```
kubectl cluster-info
```

For Windows/Mac

Download and install Minikube from the Minikube GitHub releases page.
Follow the installation instructions specific to your operating system.

💻 Basic Commands

Check Cluster Information:

kubectl cluster-info

List Nodes in the Cluster:

kubectl get nodes

Create a Deployment:

kubectl create deployment my-deployment --image=nginx

Expose a Deployment:

kubectl expose deployment my-deployment --port=80 --target-port=80 --type=NodePort

View Pods:

kubectl get pods

View Services:
```
kubectl get services
```

🚀 Getting Started with Kubernetes

Create a Deployment YAML File: A Deployment YAML file defines a set of Pods and the desired state of the application. Here’s an example:

apiVersion: apps/v1
kind: Deployment
metadata:
  name: my-app
spec:
  replicas: 3
  selector:
    matchLabels:
      app: my-app
  template:
    metadata:
      labels:
        app: my-app
    spec:
      containers:
        - name: my-app-container
          image: nginx
          ports:
            - containerPort: 80

Apply the Deployment:

kubectl apply -f deployment.yaml

Scale the Deployment:

kubectl scale deployment my-app --replicas=5

Delete the Deployment:
```
kubectl delete deployment my-app
```