Kubernetes for Beginners

Kubernetes (K8s) is the de facto standard for container orchestration. Here's what you need to know to get started.

Why Kubernetes?

Understanding the benefits of container orchestration:

• Auto-scaling based on demand
• Self-healing with automatic restarts
• Load balancing across replicas

Core Architecture

Master Components

1. API Server
2. Scheduler
3. Controller Manager
   • Deployment controller
   • ReplicaSet controller
4. etcd (key-value store)

Copy
1# Example: Kubernetes Deployment
2apiVersion: apps/v1
3kind: Deployment
4metadata:
5  name: my-app
6spec:
7  replicas: 3
8  selector:
9    matchLabels:
10      app: my-app
11  template:
12    metadata:
13      labels:
14        app: my-app
15    spec:
16      containers:
17      - name: my-app
18        image: my-app:1.0
19        ports:
20        - containerPort: 8080

Resource Types

"Kubernetes is like having a robot sysadmin that never sleeps."

• Kelsey Hightower

Getting Started

Start with these tools:

• Minikube for local development
• kubectl CLI for cluster management
• Manual deployments Helm charts for complex apps