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Deploy to Kubernetes on GKE
Sat Dec 24 2022 19:41:36 GMT+0000 (Coordinated Universal Time)
clc2ckvxt000208mf174o0lp9
deploy-to-kubernetes-on-gke
docker, aws, kubernetes, devops, gke

Tech used:

  • Node.js

  • Docker

  • Kubernetes

  • GKE(Google Kubernetes Engine)

  • GCR(Google Container Registry)

Steps

  • Create kubernetes cluster on GKE.

  • Setup Connection to created GKE cluster in with your local machine or cloud shell.

    gcloud container clusters get-credentials <CLUSTER_NAME> --zone <ZONE> --project <PROJECT_ID>

  • Create a simple nodejs/express application.

  • Write Dockerfile for the application

    FROM --platform=linux/amd64 node:14
WORKDIR /usr/app
COPY package.json .
RUN npm install
COPY . .
EXPOSE 80
CMD ["node","app.js"]

  • Build the Docker image

    docker build -t us.gcr.io/<PROJECT_ID>/imagename:tag .

  • Push docker image to GCR(Google Container Registry)

    docker push us.gcr.io/<PROJECT_ID>/imagename:tag

  • Test the application using docker.

    docker run -d -p 3000:80 us.gcr.io/<PROJECT_ID>/imagename:tag

  • Write kubernetes manifest file for deployment. deploy.yml

    apiVersion: apps/v1
kind: Deployment
metadata:
  name:  nodeappdeployment
  labels:
    type: backend
    app: nodeapp
spec:
  replicas: 1
  selector:
    matchLabels:
      type: backend
      app: nodeapp
  template:
    metadata:
      name: nodeapppod
      labels:
        type: backend
        app: nodeapp
    spec:
      containers:
        - name: nodecontainer
          image: us.gcr.io/<PROJECT_ID>/imagename:tag
          ports:
            - containerPort: 80

  • Write kubernetes manifest file for service. service.yml

    kind: Service
apiVersion: v1
metadata:
  name: nodeapp-load-service
spec:
  ports:
    - port: 80 
      targetPort: 80
  selector:
    type: backend
    app: nodeapp  
  type: LoadBalancer

  • Apply manifest file to create deployment.

    kubectl apply -f deploy.yml

  • Check status of the deployment.

    kubectl get deploy

  • Apply manifest file to create load balancer service.

    kubectl apply -f service.yml

  • Check status of service.

    kubectl get svc

  • Check the external IP of the service in the browser.