CI/CD Deployment for docker/buildx

CI/CD Deployment with Docker Buildx

The following instructions outline how to deploy Continuous Integration/Continuous Deployment (CI/CD) for the project using docker/buildx. If you find that CI/CD is not yet set up in the project, please follow the next steps provided at the end of this document.

Step-by-Step Deployment Process

Set Up the Environment

Ensure that your environment is ready for building and testing the application. If Docker is not installed, please install it following the official documentation. Ensure to have Docker BuildKit enabled in your configuration.

Create a Dockerfile

Create a Dockerfile at the root of your project to define the build process. The following example illustrates how to configure a multi-stage build for a Go application:

# syntax=docker/dockerfile:1

ARG GO_VERSION=1.23
FROM golang:${GO_VERSION}-alpine AS builder
WORKDIR /app

# Copy the source code
COPY . .

# Build the Go application
RUN go build -o myapp main.go

FROM alpine:latest
WORKDIR /app
COPY --from=builder /app/myapp .

ENTRYPOINT ["./myapp"]

Testing the Application

You can define tests in your Go application. Create a test file (e.g., main_test.go), then run the tests to ensure everything is functioning correctly:
```
package main

import (
    "testing"
)

func TestSomething(t *testing.T) {
    // Your test code here
}
```
Setup a test stage in your Makefile to run your tests:
```
test:
    go test ./... -v
```

Defining the docker-compose.yml

You can use Docker Compose to define and run multi-container applications. Below is an example configuration that defines two services, a database and a web application:

version: "3"

services:
  db:
    build: .
    command: ./entrypoint.sh
    image: docker.io/tonistiigi/db
  webapp:
    build:
      context: .
      dockerfile: Dockerfile.webapp
      args:
        buildno: 1

Define CI/CD Pipeline

Define a pipeline in your CI/CD system (like GitHub Actions, GitLab CI/CD, Jenkins, or others) to automate the build and deployment process. Here’s an example of a GitHub Actions workflow stored as .github/workflows/ci.yml:

name: CI/CD

on:
  push:
    branches:
      - main
  pull_request:

jobs:
  build:
    runs-on: ubuntu-latest

    steps:
    - name: Check out code
      uses: actions/checkout@v2

    - name: Set up Docker Buildx
      uses: docker/setup-buildx-action@v1

    - name: Build and push
      uses: docker/build-push-action@v2
      with:
        context: .
        file: Dockerfile
        push: true
        tags: myapp:latest

Running Local Builds

To run the local builds, utilize docker-compose commands. First, ensure that your Docker daemon is running:
```
docker-compose up --build
```
This command will rebuild your services based on any changes made.
Monitoring Build Status

Once CI/CD is set up, you can monitor your builds through the CI/CD platform you are using. Check for any build failures, and ensure all tests pass successfully.
Next Steps for Unset CI/CD

If your project has not yet been configured with CI/CD:
- Choose a CI/CD Tool: Select one that fits your workflow, such as GitHub Actions, GitLab CI, Jenkins, or CircleCI.
- Setup Pipeline: Define basic workflows in YAML configuration files as illustrated in step 5.
- Test Locally: Ensure local builds and tests run as expected before committing your changes.
- Push Changes: After testing locally, push your changes to the repository to trigger the CI/CD workflow.
- Incrementally Improve: Improve your CI/CD pipeline with additional tests, deployment scripts, or notifications based on requirements.

Keep this structure, adapting code snippets and configurations as necessary to fit your specific applications and infrastructure settings. Following this structured approach will help streamline your CI/CD processes efficiently.