Github - CodeBuild - CI Pipeline

This CloudFormation template will launch a continuous integration pipeline for Github using AWS Codebuild.

• New/Updated pull request webhooks from Github hit the API endpoint in AWS
• Github status is changed to pending if its a new or updated pull request, a Lambda is triggered to download the Github source to S3 bucket
• A CloudWatch rule detects the .zip download in S3 and triggers another Lambda to start Codebuild process using source
• Another CloudWatch rule detects Codebuild status on completion, and triggers a final Lambda to report back Github status with an included link to the build log.

Architectural Overview

Clone the repo

$:> git clone https://github.com/bayko/codebuild-github-ci.git

Package each of the Lambda functions using package script

$:> cd codebuild-github-ci
$:> cd lambda-github-webhook
$:> sudo ./package.sh
...

Create an S3 bucket and upload Lambda package zips

Push an image to ECR to use with CodeBuild

Launch the template

Copy output API URL from CloudFormation

Create Github webhook for pull requests

Update your buildspec.yml with desired steps for codebuild

version: 0.2
phases:
  install:
    commands:
       - bundle install
  pre_build:
    commands:
       - export RAILS_ENV=test
  build:
    commands:
       - bundle exec rake db:create
       - bundle exec rake db:schema:load
       - bundle exec rake db:migrate
  post_build:
    commands: 
       - bundle exec rspec
       - bundle exec cucumber

Trigger a pull request and check the new CloudWatch dashboard