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.

Google uses this application to demonstrate how developers can modernize enterprise applications using Google Cloud products, including: Google Kubernetes Engine (GKE), Cloud Service Mesh (CSM), gRPC, Cloud Operations, Spanner, Memorystore, AlloyDB, and Gemini. This application works on any Kubernetes cluster.

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Note to Googlers: Please fill out the form at go/microservices-demo.

Architecture

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

Find Protocol Buffers Descriptions at the ./protos directory.

Service	Language	Description
frontend	Go	Exposes an HTTP server to serve the website. Does not require signup/login and generates session IDs for all users automatically.
cartservice	C#	Stores the items in the user's shopping cart in Redis and retrieves it.
productcatalogservice	Go	Provides the list of products from a JSON file and ability to search products and get individual products.
currencyservice	Node.js	Converts one money amount to another currency. Uses real values fetched from European Central Bank. It's the highest QPS service.
paymentservice	Node.js	Charges the given credit card info (mock) with the given amount and returns a transaction ID.
shippingservice	Go	Gives shipping cost estimates based on the shopping cart. Ships items to the given address (mock)
emailservice	Python	Sends users an order confirmation email (mock).
checkoutservice	Go	Retrieves user cart, prepares order and orchestrates the payment, shipping and the email notification.
recommendationservice	Python	Recommends other products based on what's given in the cart.
adservice	Java	Provides text ads based on given context words.
loadgenerator	Python/Locust	Continuously sends requests imitating realistic user shopping flows to the frontend.

Screenshots

Home Page	Checkout Screen

Important Environment Variables and Ports for each service

Service	Environment Variables	Ports	Description
Ad Service	DISABLE_PROFILER=1 DISABLE_TRACING=1	Exposed: 9555	Provides context-based text ads for other services, such as the frontend.
Cart Service	DISABLE_PROFILER=1 DISABLE_TRACING=1	Exposed: 7070	Manages user shopping cart items using an in-memory or Redis-based store.
Checkout Service	SHIPPING_SERVICE_ADDR=<Shipping Service Address> PRODUCT_CATALOG_SERVICE_ADDR=<Product Catalog Service Address> CART_SERVICE_ADDR=<Cart Service Address> PAYMENT_SERVICE_ADDR=<Payment Service Address> EMAIL_SERVICE_ADDR=<Email Service Address> CURRENCY_SERVICE_ADDR=<Currency Service Address> RECOMMENDATION_SERVICE_ADDR=<Recommendation Service Address> AD_SERVICE_ADDR=<Ad Service Address> DISABLE_PROFILER=1 DISABLE_TRACING=1	Exposed: 5050	Orchestrates the checkout process by communicating with multiple services (cart, shipping, payment, etc.).
Currency Service	PORT=7000 DISABLE_PROFILER=1 DISABLE_TRACING=1	Exposed: 7000	Converts currency values using exchange rates, used primarily by checkout and frontend services.
Email Service	DISABLE_PROFILER=1 DISABLE_TRACING=1	Exposed: 8080	Sends order confirmation emails (mock emails).
Frontend Service	PRODUCT_CATALOG_SERVICE_ADDR=<Product Catalog Service Address> CURRENCY_SERVICE_ADDR=<Currency Service Address> CART_SERVICE_ADDR=<Cart Service Address> RECOMMENDATION_SERVICE_ADDR=<Recommendation Service Address> SHIPPING_SERVICE_ADDR=<Shipping Service Address> CHECKOUT_SERVICE_ADDR=<Checkout Service Address> AD_SERVICE_ADDR=<Ad Service Address> SHOPPING_ASSISTANT_SERVICE_ADDR=<Shopping Assistant Service Address> DISABLE_PROFILER=1 DISABLE_TRACING=1	Exposed: 8080 Host: 8080	Serves the web UI, provides endpoints for user actions (e.g., viewing products, checking out).
Payment Service	PORT=50051 DISABLE_PROFILER=1 DISABLE_TRACING=1	Exposed: 50051	Simulates payment processing for checkout, interacting with external payment APIs (mock).
Product Catalog Service	DISABLE_PROFILER=1 DISABLE_TRACING=1	Exposed: 3550	Provides product catalog details, such as retrieving product lists or details from a JSON file.
Recommendation Service	PRODUCT_CATALOG_SERVICE_ADDR=<Product Catalog Service Address> DISABLE_PROFILER=1 DISABLE_TRACING=1	Exposed: 8080	Suggests product recommendations based on items in the cart.
Shipping Service	DISABLE_PROFILER=1 DISABLE_TRACING=1	Exposed: 50051	Calculates shipping costs and handles shipping order requests during checkout.

Quickstart (GKE)

1. Ensure you have the following requirements:

   • Google Cloud project.
   • Shell environment with gcloud, git, and kubectl.

2. Clone the latest major version.

   git clone --depth 1 --branch v0 https://github.com/GoogleCloudPlatform/microservices-demo.git
   cd microservices-demo/

   The --depth 1 argument skips downloading git history.

3. Set the Google Cloud project and region and ensure the Google Kubernetes Engine API is enabled.

   export PROJECT_ID=<PROJECT_ID>
   export REGION=us-central1
   gcloud services enable container.googleapis.com \
     --project=${PROJECT_ID}

   Substitute <PROJECT_ID> with the ID of your Google Cloud project.

4. Create a GKE cluster and get the credentials for it.

   gcloud container clusters create-auto online-boutique \
     --project=${PROJECT_ID} --region=${REGION}

   Creating the cluster may take a few minutes.

5. Deploy Online Boutique to the cluster.

   kubectl apply -f ./release/kubernetes-manifests.yaml

6. Wait for the pods to be ready.

   kubectl get pods

   After a few minutes, you should see the Pods in a Running state:

   NAME                                     READY   STATUS    RESTARTS   AGE
   adservice-76bdd69666-ckc5j               1/1     Running   0          2m58s
   cartservice-66d497c6b7-dp5jr             1/1     Running   0          2m59s
   checkoutservice-666c784bd6-4jd22         1/1     Running   0          3m1s
   currencyservice-5d5d496984-4jmd7         1/1     Running   0          2m59s
   emailservice-667457d9d6-75jcq            1/1     Running   0          3m2s
   frontend-6b8d69b9fb-wjqdg                1/1     Running   0          3m1s
   loadgenerator-665b5cd444-gwqdq           1/1     Running   0          3m
   paymentservice-68596d6dd6-bf6bv          1/1     Running   0          3m
   productcatalogservice-557d474574-888kr   1/1     Running   0          3m
   recommendationservice-69c56b74d4-7z8r5   1/1     Running   0          3m1s
   redis-cart-5f59546cdd-5jnqf              1/1     Running   0          2m58s
   shippingservice-6ccc89f8fd-v686r         1/1     Running   0          2m58s
   

7. Access the web frontend in a browser using the frontend's external IP.

   kubectl get service frontend-external | awk '{print $4}'

   Visit http://EXTERNAL_IP in a web browser to access your instance of Online Boutique.

8. Congrats! You've deployed the default Online Boutique. To deploy a different variation of Online Boutique (e.g., with Google Cloud Operations tracing, Istio, etc.), see Deploy Online Boutique variations with Kustomize.

9. Once you are done with it, delete the GKE cluster.

   gcloud container clusters delete online-boutique \
     --project=${PROJECT_ID} --region=${REGION}

   Deleting the cluster may take a few minutes.

Additional deployment options

• Terraform: See these instructions to learn how to deploy Online Boutique using Terraform.
• Istio / Cloud Service Mesh: See these instructions to deploy Online Boutique alongside an Istio-backed service mesh.
• Non-GKE clusters (Minikube, Kind, etc): See the Development guide to learn how you can deploy Online Boutique on non-GKE clusters.
• AI assistant using Gemini: See these instructions to deploy a Gemini-powered AI assistant that suggests products to purchase based on an image.
• And more: The /kustomize directory contains instructions for customizing the deployment of Online Boutique with other variations.

Documentation

• Development to learn how to run and develop this app locally.

Demos featuring Online Boutique

• Platform Engineering in action: Deploy the Online Boutique sample apps with Score and Humanitec
• The new Kubernetes Gateway API with Istio and Anthos Service Mesh (ASM)
• Use Azure Redis Cache with the Online Boutique sample on AKS
• Sail Sharp, 8 tips to optimize and secure your .NET containers for Kubernetes
• Deploy multi-region application with Anthos and Google cloud Spanner
• Use Google Cloud Memorystore (Redis) with the Online Boutique sample on GKE
• Use Helm to simplify the deployment of Online Boutique, with a Service Mesh, GitOps, and more!
• How to reduce microservices complexity with Apigee and Anthos Service Mesh
• gRPC health probes with Kubernetes 1.24+
• Use Google Cloud Spanner with the Online Boutique sample
• Seamlessly encrypt traffic from any apps in your Mesh to Memorystore (redis)
• Strengthen your app's security with Cloud Service Mesh and Anthos Config Management
• From edge to mesh: Exposing service mesh applications through GKE Ingress
• Take the first step toward SRE with Cloud Operations Sandbox
• Deploying the Online Boutique sample application on Cloud Service Mesh
• Anthos Service Mesh Workshop: Lab Guide
• KubeCon EU 2019 - Reinventing Networking: A Deep Dive into Istio's Multicluster Gateways - Steve Dake, Independent
• Google Cloud Next'18 SF
  • Day 1 Keynote showing GKE On-Prem
  • Day 3 Keynote showing Stackdriver APM (Tracing, Code Search, Profiler, Google Cloud Build)
  • Introduction to Service Management with Istio
• Google Cloud Next'18 London – Keynote showing Stackdriver Incident Response Management