Blue-Green Continuous Deployment via CodePipeline on Fargate

Creating the structure:

Set the parameters in the following files

• cloudformation/pipeline-parameter.yml
• cloudformation/stack-config.yml

Run the command below after completing authentication and aws profile settings;

aws cloudformation create-stack --template-body file://cloudformation/initial.yml --cli-input-yaml file://cloudformation/initial-parameter.yml

Configure alarm-based auto-rollback

Run the command below after setting STACK_NAME with the value you had already set on stack-config.yml before

 STACK_NAME=blue-green-test-ecs
 AWS_ACCOUNT_ID=$(aws sts get-caller-identity|grep role|awk -F":" '{print$6}')
 aws cloudformation update-stack \
    --region us-east-1 \
    --stack-name $STACK_NAME  \
    --use-previous-template \
    --capabilities CAPABILITY_NAMED_IAM \
    --parameters \
         ParameterKey=Vpc,UsePreviousValue=true \
         ParameterKey=Subnet1,UsePreviousValue=true \
         ParameterKey=Subnet2,UsePreviousValue=true \
         ParameterKey=ImageUrl,UsePreviousValue=true \
         ParameterKey=EcrRepoName,UsePreviousValue=true \
    --rollback-configuration "RollbackTriggers=[{Arn=arn:aws:cloudwatch:us-east-1:$AWS_ACCOUNT_ID:alarm:${STACK_NAME}-Unhealthy-Hosts-Blue,Type=AWS::CloudWatch::Alarm},{Arn=arn:aws:cloudwatch:us-east-1:$AWS_ACCOUNT_ID:alarm:${STACK_NAME}-Http-500-Blue,Type=AWS::CloudWatch::Alarm},{Arn=arn:aws:cloudwatch:us-east-1:$AWS_ACCOUNT_ID:alarm:${STACK_NAME}-Unhealthy-Hosts-Green,Type=AWS::CloudWatch::Alarm},{Arn=arn:aws:cloudwatch:us-east-1:$AWS_ACCOUNT_ID:alarm:${STACK_NAME}-Http-500-Green,Type=AWS::CloudWatch::Alarm}]"

Destroying the structure:

Run the command below with the specific order

aws cloudformation delete-stack --stack-name blue-green-test-ecs

aws cloudformation delete-stack --stack-name blue-green-test-pipeline

Delete the S3 created with aws-cli or manually