GitHub Actions Pipeline to Create Docker Image and Push Docker Image into DockerHub | GitHub Actions Integration with DockerHub

 Please find steps for integrating DockerHub with GitHub Actions:

Implementation steps:

• Create access token in DockerHub
• Add access token, docker hub user name as secrets in GitHub Actions
• Create GitHub Actions workflow yaml in your repo
• Add tasks for Maven build, docker image creation, tagging and docker push 
• Run the workflow/build in GitHub hosted runner(e.g. Ubuntu)
• Verify docker image have been uploaded into DockerHub

Pre-requisites:

• DockerHub Account
• Make sure a Project is setup in GitHub with Dockerfile
• Create access token in Docker Hub for authenticating with DockerHub

Steps below to create access token in DockerHub:

Login to --> https://hub.docker.com/settings/security

Click on new access token:

    Copy on Generate

 

Add Docker Hub user name and token as Secrets in GitHub Actions

Go to your GitHub Repo --> Settings --> 

Click on Secrets and Variables under Security in left nav 

Click new Repository Secret

Enter DOCKERHUB_USERNAME as secret name and 

Enter your docker hub user name

Enter DOCKERHUB_TOKEN as secret name and 

Enter your token as secret

Create GitHub Actions CICD workflow yaml:

Go to GitHub repo where your Java project is, create a new file:

.github/workflows/cicd.yml

The below file have four steps(tasks) 

    - Checkout

    - Install Java on runner

    - Build using Maven

    - Build docker image and tag it

    - Upload docker image into DockerHub

Copy below YAML code:

name: cicd-workflow to create docker image and upload into Dockerhub

on:

  push:

    branches: [ "master" ]

jobs:

  job1:

    runs-on: ubuntu-latest

    steps:

    - uses: actions/checkout@v3

    - name: Set up JDK 17

      uses: actions/setup-java@v2

      with:

        distribution: 'adopt'

        java-version: '17'

    - name: Build with Maven

      run: mvn clean install

    - name: Login to Docker Hub

      uses: docker/login-action@v3

      with:

        username: ${{ secrets.DOCKERHUB_USERNAME }}

        password: ${{ secrets.DOCKERHUB_TOKEN }}

    - name: Build and push Docker image

      env:

        IMAGE_TAG: ${{ github.sha }}

      run: |

        docker build -t ${{ secrets.DOCKERHUB_USERNAME }}/myspringbootapp:${IMAGE_TAG} .

        docker push ${{ secrets.DOCKERHUB_USERNAME }}/myspringbootapp:${IMAGE_TAG}

Commit the file.

As soon as you commit, build will run immediately in GitHub Actions. 

Now you can see the output of build in Actions tab.

Login to DockerHub to verify if docker image have been uploaded successfully.

Watch steps in YouTube channel: