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GSP699 - Migrating a Monolithic Website to Microservices on Google Kubernetes Engine

Task 1. Clone the source repository

  1. Clone the source repository 
    cd ~
git clone https://github.com/googlecodelabs/monolith-to-microservices.git
cd ~/monolith-to-microservices
./setup.sh

Task 2. Create a GKE cluster

  1. Enable container API 
    gcloud services enable container.googleapis.com
  2. Buat GKE cluster dengan 3 node 
    gcloud container clusters create fancy-cluster --num-nodes 3 --machine-type=e2-standard-4
  3. Cek cluster 
    gcloud compute instances list

Task 3. Deploy the existing monolith

  1. Deploy ke GKE Cluster 
    cd ~/monolith-to-microservices
./deploy-monolith.sh

Accessing the monolith

  1. Cek ip external 
    kubectl get services monolith
    akses dengan ip external 
    http://<EXTERNAL-IP>:80

Task 4. Migrate orders to a microservice

  1. Build docker container 
    cd ~/monolith-to-microservices/microservices/src/orders
gcloud builds submit --tag gcr.io/${GOOGLE_CLOUD_PROJECT}/orders:1.0.0 .
  2. Deploy ke GKE 
    kubectl create deployment orders --image=gcr.io/${GOOGLE_CLOUD_PROJECT}/orders:1.0.0
  3. Cek deployment 
    kubectl get all
  4. Expose service 
    kubectl expose deployment orders --type=LoadBalancer --port 80 --target-port 8081
  5. Akses service 
    kubectl get services orders

Reconfigure the monolith

  1. Gunakan nano editor untuk edit atau pake code editor juga sabi 
    cd ~/monolith-to-microservices/react-app
nano .env.monolith
  2. Ubah isi file .env.monolith 
    REACT_APP_ORDERS_URL=http://<ORDERS_IP_ADDRESS>/api/orders
REACT_APP_PRODUCTS_URL=/service/products
  3. Deploy ulang monolith 
    npm run build:monolith
  4. Buat image baru 
    cd ~/monolith-to-microservices/monolith
gcloud builds submit --tag gcr.io/${GOOGLE_CLOUD_PROJECT}/monolith:2.0.0 .
  5. Deploy ke GKE 
    kubectl set image deployment/monolith monolith=gcr.io/${GOOGLE_CLOUD_PROJECT}/monolith:2.0.0

Task 5. Migrate Products to microservice

  1. Buat docker container
cd ~/monolith-to-microservices/microservices/src/products
gcloud builds submit --tag gcr.io/${GOOGLE_CLOUD_PROJECT}/products:1.0.0 .
  1. Deploy ke GKE
kubectl create deployment products --image=gcr.io/${GOOGLE_CLOUD_PROJECT}/products:1.0.0
  1. Expose service
kubectl expose deployment products --type=LoadBalancer --port 80 --target-port 8082
  1. Akses service
kubectl get services products

Reconfigure the monolith

  1. Ubah isi file .env.monolith 
    cd ~/monolith-to-microservices/react-app
nano .env.monolith
    REACT_APP_ORDERS_URL=http://<ORDERS_IP_ADDRESS>/api/orders
REACT_APP_PRODUCTS_URL=http://<PRODUCTS_IP_ADDRESS>/api/products
  2. Rebuild monolith 
    npm run build:monolith
  3. Buat image baru 
    cd ~/monolith-to-microservices/monolith
gcloud builds submit --tag gcr.io/${GOOGLE_CLOUD_PROJECT}/monolith:3.0.0 .
  4. Deploy ke GKE 
    kubectl set image deployment/monolith monolith=gcr.io/${GOOGLE_CLOUD_PROJECT}/monolith:3.0.0

Task 6. Migrate frontend to microservice

  1. copy .env.monolith to .env 
    cd ~/monolith-to-microservices/react-app
cp .env.monolith .env
npm run build
  2. Buat docker container 
    cd ~/monolith-to-microservices/microservices/src/frontend
gcloud builds submit --tag gcr.io/${GOOGLE_CLOUD_PROJECT}/frontend:1.0.0 .
  3. Deploy ke GKE 
    kubectl create deployment frontend --image=gcr.io/${GOOGLE_CLOUD_PROJECT}/frontend:1.0.0
  4. Expose service 
    kubectl expose deployment frontend --type=LoadBalancer --port 80 --target-port 8080