How can I use Docker Compose in GitHub Actions?

How can I use Docker Compose in GitHub Actions?

You can use Docker Compose in GitHub Actions by defining a job that sets up Docker and runs your Compose file. Would you like a sample workflow?

Yes, please provide a sample workflow.

Here's a basic example:

name: CI

on: [push]

jobs:
  build:
    runs-on: ubuntu-latest
    services:
      db:
        image: postgres:latest
        ports:
          - 5432:5432
    steps:
      - name: Checkout code
        uses: actions/checkout@v2
      - name: Set up Docker Compose
        run: docker-compose up -d
      - name: Run tests
        run: docker-compose run app pytest

This sets up a PostgreSQL service and runs tests in your app container.

What if I need to pass environment variables?

You can pass environment variables in your Docker Compose file or directly in the GitHub Actions workflow using the env key. Would you like to see an example?

Yes, that would be helpful!

Sure! You can modify the workflow like this:

      - name: Run tests
        env:
          DATABASE_URL: postgres://user:password@db:5432/mydb
        run: docker-compose run app pytest

This way, the DATABASE_URL variable is available in your container.