buildspec.yml

# Buildspec to pull the latest version of the Docker image from docker hub and deploy it to the ECS cluster
version: 0.2
phases:
  install:
    runtime-versions:
      docker: 18
  pre_build:
    commands:
      - echo Logging in to Amazon ECR....
      - echo $AWS_ACCOUNT_ID - $AWS_DEFAULT_REGION - $IMAGE_REPO_NAME - $IMAGE_TAG
      - aws --version
      - aws ecr get-login-password --region $AWS_DEFAULT_REGION | docker login --username AWS --password-stdin $AWS_ACCOUNT_ID.dkr.ecr.$AWS_DEFAULT_REGION.amazonaws.com
      - export REPOSITORY_URI=$AWS_ACCOUNT_ID.dkr.ecr.$AWS_DEFAULT_REGION.amazonaws.com/$IMAGE_REPO_NAME
      - echo Build started on `date`
      - echo Building the Docker image...
      - docker build -t $IMAGE_REPO_NAME:$IMAGE_TAG ./flask_app
      - docker tag $IMAGE_REPO_NAME:$IMAGE_TAG $REPOSITORY_URI:$IMAGE_TAG
  build:
    commands:
      - echo Pushing the Docker image to ECR...
      - echo $REPOSITORY_URI:$IMAGE_TAG
      - docker push $REPOSITORY_URI:$IMAGE_TAG
  post_build:
    commands:
      - echo Build completed on `date`
      - echo Deploying new task definition $IMAGE_TAG to ECS cluster...
      - echo ECS_CLUSTER_NAME - $ECS_SERVICE_NAME, ECS_SERVICE_NAME - $ECS_SERVICE_NAME
      - aws ecs update-service --cluster $ECS_CLUSTER_NAME --service $ECS_SERVICE_NAME --task-definition $ECS_TASK_DEFINITION --force-new-deployment
      - echo ECS service $ECS_SERVICE_NAME updated