Kubernetes Cluster Setup Explained | Kops, Kubeadm, EKS + Quorum & RAFT

madhukarreddyeng April 22, 2026 3 min read

If you’re learning Kubernetes, one of the biggest questions you’ll face is:

👉 “How do I actually create a Kubernetes cluster?”

The answer is — there isn’t just one way.

In this guide, we’ll break down:

All major ways to create a Kubernetes cluster
When to use each method
What Quorum is and why it matters
How the RAFT algorithm works (in simple terms)
A real-world example using Kops

🎥 Watch the Full Video

🧠 Why Understanding Cluster Setup Matters

Before jumping into commands, understand this:

Kubernetes is not just a tool — it’s a distributed system.

And distributed systems come with challenges like:

Node failures
Data consistency
Leader election

That’s where concepts like Quorum and RAFT become critical.

⚙️ Ways to Create a Kubernetes Cluster

There are multiple ways to set up a Kubernetes cluster depending on your needs:

🔹 1. Kops (Production-ready on AWS)

Best for: Real-world AWS environments
Automates cluster creation using infrastructure
Uses S3 as state store

👉 Great for learning + production-like setups

🔹 2. Kubeadm (Official Tool)

Provided by Kubernetes itself
Gives full control over cluster setup
Requires manual configuration

👉 Best for deep learning

🔹 3. Rancher / RKE

UI-based Kubernetes management
Easier for teams
Enterprise-friendly

👉 Best for organizations

🔹 4. K3s (Lightweight Kubernetes)

Minimal resource usage
Easy to install
Ideal for edge environments

👉 Best for low-resource setups

🔹 5. Minikube / Kind (Local Development)

Run Kubernetes locally
Perfect for practice

👉 Best for beginners

🔹 6. Managed Kubernetes (EKS / AKS / GKE)

Cloud providers manage everything
No need to worry about control plane

👉 Best for production at scale

🔹 7. Terraform (Infrastructure as Code)

Automates cluster creation
Version-controlled infrastructure

👉 Best for DevOps workflows

🧠 What is Quorum?

In simple terms:

Quorum is the minimum number of nodes required to make decisions in a cluster.

Without quorum, the system cannot safely operate.

📊 RAFT Algorithm (Simplified)

Kubernetes uses distributed system principles like RAFT.

Formula:

(N - 1) / 2

👉 This tells you how many node failures the cluster can tolerate.

Example:

If you have 3 nodes:

(3 - 1) / 2 = 1

👉 The cluster can tolerate 1 node failure

⚠️ What Happens If Quorum is Lost?

If too many nodes fail:

Cluster becomes read-only
No new writes allowed
Leader election fails
System becomes unstable

👉 This is why production clusters use odd number of nodes (3, 5, 7)

🚀 Deploying Kubernetes Cluster with Kops

Let’s look at a real example.

🔧 Prerequisites

You need:

Kops
Kubectl
AWS CLI

📦 Set State Store

export KOPS_STATE_STORE=s3://realreview.com

🏗️ Create Cluster

kops create cluster k8s.aws365.shop \
  --state=s3://realreview.com \
  --cloud=aws \
  --zones=us-east-1a \
  --control-plane-count=1 \
  --control-plane-zones=us-east-1a \
  --control-plane-size=t3.medium \
  --node-count=2 \
  --node-size=t3.medium \
  --dns-zone=aws365.shop \
  --networking=calico \
  --topology=public \
  --api-loadbalancer-type=public

✅ Apply Cluster

kops update cluster k8s.aws365.shop --yes

🔍 Validate Cluster

kops validate cluster --wait 10m

🧪 Smoke Testing

Check cluster:

kubectl get nodes
kubectl get ns
kubectl get po -n kube-system

🚀 Deploy Test App

kubectl create deployment test --image=nginx --replicas=3
kubectl expose deployment test --port=80 --type=LoadBalancer

🧹 Cleanup

kops delete cluster k8s.aws365.shop --yes

🎯 Final Thoughts

Kubernetes cluster setup is not just about running commands.

It’s about understanding:

Which tool to use
How distributed systems work
Why quorum and RAFT are critical

👉 Once you understand this, Kubernetes becomes much easier.

🔥 What’s Next?

In the next post:
👉 Installing Kubernetes & deploying your first app