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content/guides/ruby/configure-github-actions.md

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+---
+title: Automate your builds with GitHub Actions
+linkTitle: Automate your builds with GitHub Actions
+weight: 20
+keywords: ci/cd, github actions, ruby, flask
+description: Learn how to configure CI/CD using GitHub Actions for your Ruby on Rails application.
+aliases:
+  - /language/ruby/configure-ci-cd/
+  - /guides/language/ruby/configure-ci-cd/
+  - /guides/ruby/configure-ci-cd/
+---
+
+## Prerequisites
+
+Complete all the previous sections of this guide, starting with [Containerize a Ruby on Rails application](containerize.md). You must have a [GitHub](https://github.com/signup) account and a [Docker](https://hub.docker.com/signup) account to complete this section.
+
+If you didn't create a GitHub repository for your project yet, it is time to do it. You also need to configure Docker Hub credentials, make a commit and push the source code.
+
+1. [Create a new repository](https://github.com/new) on GitHub.
+
+2. Open the repository **Settings**, and go to **Secrets and variables** >
+   **Actions**.
+
+3. Under the `Variables` tab, create a new **Repository variable** named `DOCKER_USERNAME` and your Docker ID as a value.
+
+4. Create a new [Personal Access Token (PAT)](/manuals/security/for-developers/access-tokens.md#create-an-access-token) for Docker Hub. You can name this token `docker-tutorial`. Make sure access permissions include Read and Write.
+
+5. Add the PAT as a **Repository secret** in your GitHub repository, with the name
+   `DOCKERHUB_TOKEN`.
+
+6. In your local repository on your machine, run the following command to change
+   the origin to the repository you just created. Make sure you change
+   `your-username` to your GitHub username and `your-repository` to the name of
+   the repository you created.
+
+   ```console
+   $ git remote set-url origin https://github.com/your-username/your-repository.git
+   ```
+
+7. Run the following commands to stage, commit, and push your local repository to GitHub.
+
+   ```console
+   $ git add -A
+   $ git commit -m "my commit"
+   $ git push -u origin main
+
+
+## Overview
+
+GitHub Actions is a CI/CD (Continuous Integration and Continuous Deployment) automation tool built into GitHub. It allows you to define custom workflows for building, testing, and deploying your code when specific events occur (e.g., pushing code, creating a pull request, etc.). A workflow is a YAML-based automation script that defines a sequence of steps to be executed when triggered. Workflows are stored in the `.github/workflows/` directory of a repository.
+
+In this section, you'll learn how to set up and use GitHub Actions to build your Docker image as well as push it to Docker Hub. You will complete the following steps:
+
+1. Create a new repository on GitHub.
+2. Define the GitHub Actions workflow.
+3. Run the workflow.
+
+## 1. Create the repository
+
+If you didn't create the repository for your project yet, it is time to do it. You also need to configure Docker Hub credentials, make a commit and push the source code.
+
+1. [Create a new repository](https://github.com/new) on GitHub.
+
+2. Open the repository **Settings**, and go to **Secrets and variables** >
+   **Actions**.
+
+3. Create a new **Repository variable** named `DOCKER_USERNAME` and your Docker ID as value.
+
+4. Create a new [Personal Access Token (PAT)](/manuals/security/for-developers/access-tokens.md#create-an-access-token) for Docker Hub. You can name this token `docker-tutorial`. Make sure access permissions include Read and Write.
+
+5. Add the PAT as a **Repository secret** in your GitHub repository, with the name
+   `DOCKERHUB_TOKEN`.
+
+6. In your local repository on your machine, run the following command to change
+   the origin to the repository you just created. Make sure you change
+   `your-username` to your GitHub username and `your-repository` to the name of
+   the repository you created.
+
+   ```console
+   $ git remote set-url origin https://github.com/your-username/your-repository.git
+   ```
+
+7. Run the following commands to stage, commit, and push your local repository to GitHub.
+
+   ```console
+   $ git add -A
+   $ git commit -m "my commit"
+   $ git push -u origin main
+   ```
+
+## 2. Set up the workflow
+
+Set up your GitHub Actions workflow for building, testing, and pushing the image
+to Docker Hub.
+
+1. Go to your repository on GitHub and then select the **Actions** tab.
+
+2. Select **set up a workflow yourself**.
+
+   This takes you to a page for creating a new GitHub actions workflow file in
+   your repository, under `.github/workflows/main.yml` by default.
+
+3. In the editor window, copy and paste the following YAML configuration.
+
+   ```yaml
+   name: ci
+
+   on:
+     push:
+       branches:
+         - main
+
+   jobs:
+     build:
+       runs-on: ubuntu-latest
+       steps:
+         - name: Login to Docker Hub
+           uses: docker/login-action@v3
+           with:
+             username: ${{ vars.DOCKER_USERNAME }}
+             password: ${{ secrets.DOCKERHUB_TOKEN }}
+
+         - name: Set up Docker Buildx
+           uses: docker/setup-buildx-action@v3
+
+         - name: Build and push
+           uses: docker/build-push-action@v6
+           with:
+             push: true
+             tags: ${{ vars.DOCKER_USERNAME }}/${{ github.event.repository.name }}:latest
+   ```
+
+   For more information about the YAML syntax for `docker/build-push-action`,
+   refer to the [GitHub Action README](https://github.com/docker/build-push-action/blob/master/README.md).
+
+## 3. Run the workflow
+
+Save the workflow file and run the job.
+
+1. Select **Commit changes...** and push the changes to the `main` branch.
+
+   After pushing the commit, the workflow starts automatically.
+
+2. Go to the **Actions** tab. It displays the workflow.
+
+   Selecting the workflow shows you the breakdown of all the steps.
+
+3. When the workflow is complete, go to your
+   [repositories on Docker Hub](https://hub.docker.com/repositories).
+
+   If you see the new repository in that list, it means the GitHub Actions
+   successfully pushed the image to Docker Hub.
+
+## Summary
+
+In this section, you learned how to set up a GitHub Actions workflow for your Ruby on Rails application.
+
+Related information:
+
+- [Introduction to GitHub Actions](/guides/gha.md)
+- [Docker Build GitHub Actions](/manuals/build/ci/github-actions/_index.md)
+- [Workflow syntax for GitHub Actions](https://docs.github.com/en/actions/using-workflows/workflow-syntax-for-github-actions)
+
+## Next steps
+
+Next, learn how you can locally test and debug your workloads on Kubernetes before deploying.