Continuous Integration and Continuous Delivery

Step-01: Introduction to CI CD

• For introduction slides refer the presentation slides.

Step-02: Pre-requisite Step - Create Staging and production services in ECS

• Create ECS Task Definition
  • Name: ecs-cicd-nginx
  • Container Name: ecs-cicd-nginx
  • Important Note: Make a note of this container name, this should be same as we give in our buildspec.yml for container name
  • Image: stacksimplify/nginxapp2:latest
• Create Staging ECS Service
  • Name: staging-ecs-cicd-nginx-svc
  • Number of Tasks: 1
• Create Production ECS Service
  • Name: prod-ecs-cicd-nginx-svc
  • Number of Tasks: 1

Step-03: Create CodeCommit Repository

• Create Code Commit Repository with name as ecs-cicd-nginx
• Create git credentials from IAM Service and make a note of those credentials.
• Clone the git repository from Code Commit to local repository

git clone https://git-codecommit.ap-south-1.amazonaws.com/v1/repos/ecs-cicd-nginx

• Copy below listed two files from course section 06-CICD-ContinuousIntegration-ContinuousDelivery to local repository
  • Dockerfile
  • index.html
• Commit code and Push to CodeCommit Repo

git status
git add .
git commit -am "1-Added Dockerfile and index.html"
git push
git status

• Verify the same on CodeCommit Repository in AWS Management console.

Step-04: Create buildspec.yml for CodeBuild

• Create a new repository in Elastic Container Registry (ECR) with name as ecs-cicd-nginx and make a note of ECR Repository full name.
• Create buildspec.yml file in local desktop folder ecs-cicd-nginx
• Update buildspec.yml file
  • Update REPOSITORY_URI value with complete ECR Repository name
  • Update the Container Name at printf '[{"name":"ecs-cicd-nginx" in buildspec.yml
  • Important Note: In ECS Task Definition also when we are creating it, please ensure we give the container name as ecs-cicd-nginx

buildspec.yml

version: 0.2

phases:
  install:
    runtime-versions:
      docker: 18       
  pre_build:
    commands:
      - echo Logging in to Amazon ECR.....
      - aws --version
      - $(aws ecr get-login --region $AWS_DEFAULT_REGION --no-include-email)
      - REPOSITORY_URI=180789647333.dkr.ecr.ap-south-1.amazonaws.com/ecs-cicd-nginx
      - IMAGE_TAG=$(echo $CODEBUILD_RESOLVED_SOURCE_VERSION | cut -c 1-7)
  build:
    commands:
      - echo Build started on `date`
      - echo Building the Docker image...
      - docker build -t $REPOSITORY_URI:$IMAGE_TAG .
  post_build:
    commands:
      - echo Build completed on `date`
      - echo Pushing the Docker images...
      - docker push $REPOSITORY_URI:$IMAGE_TAG
      - echo Writing image definitions file...
      - printf '[{"name":"ecs-cicd-nginx","imageUri":"%s"}]' $REPOSITORY_URI:$IMAGE_TAG > imagedefinitions.json
artifacts:
    files: imagedefinitions.json

• Push the updated code to codeCommit Repository.

git status
git add .
git commit -am "2-Added buildspec.yml"
git push
git status

Step-05: Create CodePipeline

• Create CodePipeline
• Update the CodeBuild Role to have access to ECR to upload images built by codeBuild.
  • Policy Name: AmazonEC2ContainerRegistryFullAccess
• Test by accessing the static html page

Step-06: Make changes to index.html file

• Make changes to index.html (Update as V2)
• Commit the changes to local git repository and push to codeCommit Repository
• Monitor the codePipeline
• Test by accessing the static html page

git status
git commit -am "V2 Deployment"
git push

Step-07: Create Manual Approval stage in CodePipeline

• Create SNS Topic and confirm the email subsciption for sending notificaitons.
• Edit Pipeline and Create Manual Approval Stage

Step-08: Create Deploy to Prod ECS Service stage in CodePipeline

• Edit the pipeline and create Deploy to prod ECS Service