Deploy to Kubernetes using GitHub Actions

Step #1:Create Dockerfile for Node.js App

We need to create Dockerfile for Node.js App using below code.

FROM node:14
WORKDIR /usr/src/app
COPY package*.json ./
RUN npm install
RUN npm install express
COPY . .
EXPOSE 3000
CMD [ "node", "server.js" ]

Step #2:Create package.json file

After the first step we need to create package.json file using below code.

{
    "name": "docker_web_app",
    "version": "1.0.0",
    "description": "Node.js on Docker",
    "author": "First Last <first.last@example.com>",
    "main": "server.js",
    "scripts": {
      "start": "node server.js"
    },
    "dependencies": {
      "express": "^4.16.1"
    }
  }

Step #3:Create Server.js file

Now lets create server.js file

'use strict';

const express = require('express');

// Constants
const PORT = 3000;
const HOST = '0.0.0.0';

// App
const app = express();
app.get('/', (req, res) => {
  res.send('Hello World');
});

app.listen(PORT, HOST);
console.log(`Running on http://${HOST}:${PORT}`);

Step #4:Create Kubernetes Deployment and Service file

Here lets create k8s-node-app.yaml file using below code.

---
kind: Deployment
apiVersion: apps/v1
metadata:
  name: nodejs-app
  namespace: default
  labels:
    app: nodejs-app
spec:
  replicas: 1
  selector:
    matchLabels:
      app: nodejs-app
  template:
    metadata:
      labels:
        app: nodejs-app
    spec:
      containers:
      - name: nodejs-app
        image: "devopshint/node-app:latest"
        ports:
          - containerPort: 3000
---
apiVersion: v1
kind: Service
metadata:
  name: nodejs-app
  namespace: default
spec:
  selector:
    app: nodejs-app
  type: NodePort
  ports:
  - name: http
    targetPort: 3000
    port: 80

Step #5:GitHub Actions Workflow to Deploy to Kubernetes using GitHub Actions

Now its time to create workflow so firstly create .github>>Workflows>>deploy-to-minikube-github-actions.yaml

name: Deploy to Minikube using GitHub Actions

on: [push]
  
jobs:
  job1:
    runs-on: ubuntu-latest
    name: build Node.js Docker Image and deploy to minikube
    steps:
    - uses: actions/checkout@v2
    - name: Start minikube
      uses: medyagh/setup-minikube@master
    - name: Try the cluster !
      run: kubectl get pods -A
    - name: Build image
      run: |
          export SHELL=/bin/bash
          eval $(minikube -p minikube docker-env)
          docker build -f ./Dockerfile -t devopshint/node-app:latest .
          echo -n "verifying images:"
          docker images         
    - name: Deploy to minikube
      run:
        kubectl apply -f k8s-node-app.yaml
    - name: Test service URLs
      run: |
          minikube service list
          minikube service nodejs-app --url

After that go to the actions and check your job is success or not

So you can see my job status is success

You can see the final output

We have covered Deploy to Kubernetes using GitHub Actions.

Conclusion:

In this article we have covered How to Deploy to Kubernetes using GitHub Actions | Deploy Node.js app to Kubernetes using GitHub Actions

Related Articles:

Push Docker Image to DockerHub Using GitHub Actions

Reference:

Setup Minikube as CI step in GitHub Actions official page