📌 Part 2 Mastering Kubernetes: Deploying Kind Clusters and Applications with Ease

1️⃣ Overview

This section focuses on deploying a Kind (Kubernetes in Docker) cluster and deploying the EasyShop application along with MongoDB. We'll also cover networking, storage configuration, and troubleshooting.

✅ Set up a Kind Cluster (Lightweight Kubernetes in Docker)
✅ Deploy MongoDB and Persistent Storage
✅ Deploy EasyShop Application (E-Commerce app)
✅ Configure Networking, Services, and Storage

By the end of this section, you’ll have a fully functional Kubernetes cluster with a running application. 🚀

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2️⃣ Setting Up a Kind Cluster

🔹 Why Use Kind?

• Kind is a lightweight Kubernetes cluster that runs in Docker containers.

• It allows for fast testing and local development.

• It mimics a real Kubernetes cluster without requiring a cloud provider.

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🔹 Install Kind & Verify Installation

If you haven’t installed Kind, install it with the following:

bashCopyEditcurl -Lo ./kind https://kind.sigs.k8s.io/dl/v0.20.0/kind-linux-amd64
chmod +x ./kind
sudo mv ./kind /usr/local/bin/kind

Verify installation:

bashCopyEditkind version

✅ Sample Output:

bashCopyEditkind v0.20.0 go1.19.4 linux/amd64

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🔹 Create a Kubernetes Cluster with Kind

We'll use a custom Kind cluster configuration to optimize networking and storage.

Download the Cluster Configuration File

bashCopyEditcurl -o kind-config.yaml https://raw.githubusercontent.com/Vikas-DevOpsPractice/EasyShop/feature/kindcluster/K8s/00-kind-config.yaml

Create the Kind Cluster

bashCopyEditkind create cluster --name easyshop --config kind-config.yaml

✅ Sample Output:

bashCopyEditCreating cluster "easyshop" ...
✓ Ensuring node image (kindest/node:v1.28.0) 🖼 
✓ Preparing nodes 📦  
✓ Configuring nodes 🛠  
✓ Writing configuration 📜  
✓ Starting control-plane 🏠  
Cluster "easyshop" created successfully 🎉

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3️⃣ Configuring Kubernetes Namespace

Namespaces allow logical separation of resources in a cluster.

Download & Apply the Namespace Configuration

bashCopyEditcurl -o namespace.yaml https://raw.githubusercontent.com/Vikas-DevOpsPractice/EasyShop/feature/kindcluster/K8s/01-namespace.yaml
kubectl apply -f namespace.yaml

✅ Sample Output:

arduinoCopyEditnamespace/easyshop created

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4️⃣ Setting Up Persistent Storage for MongoDB

🔹 Why is this important?

• Persistent Volumes (PV) ensure MongoDB retains data across pod restarts.

• Persistent Volume Claims (PVC) allow MongoDB to dynamically request storage.

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🔹 Create a Persistent Volume

Download & Apply the PV Configuration

bashCopyEditcurl -o mongodb-pv.yaml https://raw.githubusercontent.com/Vikas-DevOpsPractice/EasyShop/feature/kindcluster/K8s/02-mongodb-pv.yaml
kubectl apply -f mongodb-pv.yaml

✅ Sample Output:

bashCopyEditpersistentvolume/mongodb-pv created

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🔹 Create a Persistent Volume Claim

Download & Apply the PVC Configuration

bashCopyEditcurl -o mongodb-pvc.yaml https://raw.githubusercontent.com/Vikas-DevOpsPractice/EasyShop/feature/kindcluster/K8s/03-mongodb-pvc.yaml
kubectl apply -f mongodb-pvc.yaml

✅ Sample Output:

bashCopyEditpersistentvolumeclaim/mongodb-pvc created

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5️⃣ Creating ConfigMap and Secrets

🔹 Why is this important?

• ConfigMaps store non-sensitive configurations like database URIs.

• Secrets store sensitive credentials securely.

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🔹 Create a ConfigMap

Download & Apply the ConfigMap

bashCopyEditcurl -o configmap.yaml https://raw.githubusercontent.com/Vikas-DevOpsPractice/EasyShop/feature/kindcluster/K8s/04-configmap.yaml
kubectl apply -f configmap.yaml

✅ Sample Output:

arduinoCopyEditconfigmap/easyshop-config created

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🔹 Create a Secret

Download & Apply the Secret

bashCopyEditcurl -o secrets.yaml https://raw.githubusercontent.com/Vikas-DevOpsPractice/EasyShop/feature/kindcluster/K8s/05-secrets.yaml
kubectl apply -f secrets.yaml

✅ Sample Output:

bashCopyEditsecret/mongodb-secret created

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6️⃣ Deploying MongoDB Service & StatefulSet

🔹 Why StatefulSet?

• MongoDB requires persistent identity & storage.

• StatefulSets ensure pods retain their hostname and volume claims.

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🔹 Create MongoDB Service

Download & Apply the Service Configuration

bashCopyEditcurl -o mongodb-service.yaml https://raw.githubusercontent.com/Vikas-DevOpsPractice/EasyShop/feature/kindcluster/K8s/06-mongodb-service.yaml
kubectl apply -f mongodb-service.yaml

✅ Sample Output:

bashCopyEditservice/mongodb created

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🔹 Deploy MongoDB StatefulSet

Download & Apply the StatefulSet

bashCopyEditcurl -o mongodb-statefulset.yaml https://raw.githubusercontent.com/Vikas-DevOpsPractice/EasyShop/feature/kindcluster/K8s/07-mongodb-statefulset.yaml
kubectl apply -f mongodb-statefulset.yaml

✅ Sample Output:

bashCopyEditstatefulset.apps/mongodb created

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7️⃣ Deploying the EasyShop Application

🔹 Download & Apply the Deployment Configuration

bashCopyEditcurl -o easyshop-deployment.yaml https://raw.githubusercontent.com/Vikas-DevOpsPractice/EasyShop/feature/kindcluster/K8s/08-easyshop-deployment.yaml
kubectl apply -f easyshop-deployment.yaml

✅ Sample Output:

bashCopyEditdeployment.apps/easyshop created

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🔹 Deploy the EasyShop Service

bashCopyEditcurl -o easyshop-service.yaml https://raw.githubusercontent.com/Vikas-DevOpsPractice/EasyShop/feature/kindcluster/K8s/09-easyshop-service.yaml
kubectl apply -f easyshop-service.yaml

✅ Sample Output:

bashCopyEditservice/easyshop created

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8️⃣ Verifying Deployment

🔹 Check MongoDB & EasyShop Pods

bashCopyEditkubectl get pods -n easyshop

✅ Expected Output:

sqlCopyEditNAME                            READY   STATUS    RESTARTS   AGE
mongodb-0                       1/1     Running   0          3m
easyshop-58bffd5bcd-xyz12       1/1     Running   0          2m

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🔹 Check Services

bashCopyEditkubectl get svc -n easyshop

✅ Expected Output:

nginxCopyEditNAME         TYPE        CLUSTER-IP      PORT(S)          AGE
mongodb     ClusterIP   10.96.12.10     27017/TCP        3m
easyshop    ClusterIP   10.96.15.20     80/TCP           2m

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🎯 Conclusion

🚀 Kind Cluster & Application Deployment is complete!
✅ Kind Cluster is running inside Docker
✅ MongoDB is deployed with Persistent Storage
✅ EasyShop application is running on Kubernetes

📌 Next Step: Kubernetes Dashboard