☸️📦 Microservices application deployment on Kubernetes Cluster

Deploy an online-shop microservices application on a Kubernetes cluster using Kustomize.

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📌 Project Overview:

Online Boutique is a cloud-first microservices demo application. The application is a web-based e-commerce app where users can browse items, add them to the cart, and purchase them.
This project demonstrates how to deploy and run a microservices-based application on Kubernetes using production and security best practices.

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🏗️ Architecture:

Online Boutique is composed of 11 microservices written in different languages that talk to each other over gRPC.

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🚀 Deployment Process:

As a DevOps Engineer, when you are given a task to deploy the microservices application on a Kubernetes Cluster, you need to communicate with developers to understand the key information regarding microservices, like:

1- Which microservices are being deployed?
2- Which microservices are connected to others?
3- What dependencies does each microservice have (e.g., databases or third-party services such as message brokers)?
4- Which microservice is accessible from outside the cluster?
5- On Which Port does each microservice run?

You don’t need to understand the internal code of each service—only how they interact and operate.

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⚙️ Deploy Online Boutique with Kustomize

1. From the root folder of this repository, navigate to the kustomize/ directory.

   cd kustomize/

2. See what the default Kustomize configuration defined by kustomize/kustomization.yaml will generate (without actually deploying them yet).

   kubectl kustomize .

3. Apply the default Kustomize configuration (kustomize/kustomization.yaml).

   kubectl apply -k .

4. Wait for all Pods to show STATUS of Running.

   kubectl get pods
   

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🔐 Production & Securiy Best Practices:

• Specify a Pinned version for each container image
• Configure Liveness probe on each container
• Configure Readiness probe on each container
• Configure Resource Requests for each container
• Configure Resource Limits for each container
• Don't use Node Port service to expose application
• Explicitly specify more than 1 Replicas for deployment
• Use more than 1 worker nodes for your cluster
• Use namespace to isolate resources across teams and projects
• Ensure Images are free of vulnerabilities
• Don't run your containers with Root Access

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🎯 Learning Objectives:

• Gain hands-on experience with core Kubernetes resources such as Deployments, Services, ConfigMaps, and Secrets.
• Apply production best practices, including resource limits, health checks (liveness/readiness probes), and secure configurations.
• Understand how to debug and monitor Kubernetes workloads using kubectl commands.
• Learn how to organize and manage Kubernetes manifests using Kustomize overlays and bases.

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🌐 Live Demo:

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👨‍💻 Connect with me:

Ibrar Munir

Github: https://github.com/ibrarmunircoder
LinkedIn: https://www.linkedin.com/in/ibrar-munir-53197a16b
Portfolio: https://ibrarmunir.d3psh89dj43dt6.amplifyapp.com