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The Good Parts of AWS: Cutting Through the Clutter

Automatic Deployments: Create a CodePipeline

Explore how to create an automated deployment pipeline in AWS using CodePipeline. Understand the process of connecting GitHub for source control, building with CodeBuild, and deploying to EC2 instances via CodeDeploy. This lesson guides you through setting up webhooks, installing the CodeDeploy agent, and testing automatic application updates in real time.

We'll cover the following...

Objective

  • Automatically update our application when a change gets pushed to GitHub.

Steps

  • Create a CodePipeline.

Defining our pipeline

The pipeline comes in three stages:

  1. The Source stage pulls the latest code from GitHub.
  2. The Build stage builds the latest code with CodeBuild according to our buildspec.yml file.
  3. The Deploy stage deploys the build artifacts from CodeBuild to the EC2 instances referenced in the deployment group, and starts the application according to our appspec.yml file.
YAML
Pipeline:
  Type: AWS::CodePipeline::Pipeline
  Properties:
    Name: !Ref AWS::StackName
    ArtifactStore:
      Location: !Ref CodePipelineBucket
      Type: S3
    RoleArn: !GetAtt DeploymentRole.Arn
    Stages:
      - Name: Source
        Actions:
          - Name: Source
            ActionTypeId:
              Category: Source
              Owner: ThirdParty
              Version: 1
              Provider: GitHub
            OutputArtifacts:
              - Name: Source
            Configuration:
              Owner: !Ref GitHubOwner
              Repo: !Ref GitHubRepo
              Branch: !Ref GitHubBranch
              OAuthToken: !Ref GitHubPersonalAccessToken
              PollForSourceChanges: false
            RunOrder: 1
      - Name: Build
        Actions:
          - Name: Build
            ActionTypeId:
              Category: Build
              Owner: AWS
              Version: 1
              Provider: CodeBuild
            InputArtifacts:
              - Name: Source
            OutputArtifacts:
              - Name: Build
            Configuration:
              ProjectName: !Ref BuildProject
            RunOrder: 1
      - Name: Staging
        Actions:
          - Name: Staging
            InputArtifacts:
              - Name: Build
            ActionTypeId:
              Category: Deploy
              Owner: AWS
              Version: 1
              Provider: CodeDeploy
            Configuration:
              ApplicationName: !Ref DeploymentApplication
              DeploymentGroupName: !Ref StagingDeploymentGroup
            RunOrder: 1

Line #25: We don’t need to poll for changes because we’ll set up a webhook to trigger a deployment as soon as GitHub receives a change.

Now, let’s create the webhook that will ...