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Today — 30 January 2025Main stream

Learning Notes #67 – Build and Push to a Registry (Docker Hub) with GH-Actions

✇Parotta Salna
By: Mr.ParottaSalna
28 January 2025 at 02:30

GitHub Actions is a powerful tool for automating workflows directly in your repository.In this blog, we’ll explore how to efficiently set up GitHub Actions to handle Docker workflows with environments, secrets, and protection rules.

Why Use GitHub Actions for Docker?

My Code base is in Github and i want to tryout gh-actions to build and push images to docker hub seamlessly.

Setting Up GitHub Environments

GitHub Environments let you define settings specific to deployment stages. Here’s how to configure them:

1. Create an Environment

Go to your GitHub repository and navigate to Settings > Environments. Click New environment, name it (e.g., production), and save.

2. Add Secrets and Variables

Inside the environment settings, click Add secret to store sensitive information like DOCKER_USERNAME and DOCKER_TOKEN.

Use Variables for non-sensitive configuration, such as the Docker image name.

3. Optional: Set Protection Rules

Enforce rules like requiring manual approval before deployments. Restrict deployments to specific branches (e.g., main).

Sample Workflow for Building and Pushing Docker Images

Below is a GitHub Actions workflow for automating the build and push of a Docker image based on a minimal Flask app.

Workflow: .github/workflows/docker-build-push.yml


name: Build and Push Docker Image

on:
  push:
    branches:
      - main  # Trigger workflow on pushes to the `main` branch

jobs:
  build-and-push:
    runs-on: ubuntu-latest
    environment: production  # Specify the environment to use

    steps:
      # Checkout the repository
      - name: Checkout code
        uses: actions/checkout@v3

      # Log in to Docker Hub using environment secrets
      - name: Log in to Docker Hub
        uses: docker/login-action@v2
        with:
          username: ${{ secrets.DOCKER_USERNAME }}
          password: ${{ secrets.DOCKER_TOKEN }}

      # Build the Docker image using an environment variable
      - name: Build Docker image
        env:
          DOCKER_IMAGE_NAME: ${{ vars.DOCKER_IMAGE_NAME }}
        run: |
          docker build -t ${{ secrets.DOCKER_USERNAME }}/$DOCKER_IMAGE_NAME:${{ github.run_id }} .

      # Push the Docker image to Docker Hub
      - name: Push Docker image
        env:
          DOCKER_IMAGE_NAME: ${{ vars.DOCKER_IMAGE_NAME }}
        run: |
          docker push ${{ secrets.DOCKER_USERNAME }}/$DOCKER_IMAGE_NAME:${{ github.run_id }}

To Actions on live: https://github.com/syedjaferk/gh_action_docker_build_push_fastapi_app/actions

Before yesterdayMain stream

Learning Notes #2 – Automate Email Notifications in GitHub Actions

✇Parotta Salna
By: Mr.ParottaSalna
20 December 2024 at 07:07

Today, i was checking youtube videos on github actions. I came across a video on sending a mail via a Github Action https://www.youtube.com/watch?v=SkD7KQ3KzZs&t=108s. This blog is just an implementation of the video.

What am i going to do ?

I need to send a mail using my gmail id via Github

What prior information you need ?

  1. Gmail SMTP Server address – smtp.gmail.com
  2. Gmail SMTP port – 465
  3. Email username – your mail id.
  4. Email password – App Password from Google. https://support.google.com/accounts/answer/185833?hl=en.

YAML File


name: "Send Mail"

on:
  workflow_dispatch:

jobs:
  mail:
    runs-on: ubuntu-latest
    steps:
      - name: Print Name
        run: echo "Sending Mail"
    
      - name: Send Mail
        if: ${{ always() }}
        uses: dawidd6/action-send-mail@v3
        with:
          server_address: smtp.gmail.com
          server_port: 465

          username: ${{ secrets.EMAIL_USERNAME }}
          password: ${{ secrets.EMAIL_PASSWORD }}

          subject: ${{ github.job }} job of ${{ github.repository }} has  ${{ github.status }}
          body: "Test Message in Github"
          to:  syedjafer1997@gmail.com
          from: Syed Jafer K

My Github Run: https://github.com/syedjaferk/gh_actions_templates/actions/runs/12426929593

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