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605-Updating-Containers-With-BlueGreen

README.md

Updating containers with blue/green deployments

Preparation

This recipe requires some “prep work” which deploys resources that you’ll build the solution on. You will use the AWS CDK to deploy these resources

In the root of this Chapter’s repo cd to the “605-Updating-Containers-With-BlueGreen/cdk-AWS-Cookbook-605” directory:

cd 605-Updating-Containers-With-BlueGreen/cdk-AWS-Cookbook-605/
test -d .venv || python3 -m venv .venv
source .venv/bin/activate
pip install --upgrade pip
pip install -r requirements.txt
cdk deploy

Wait for the cdk deploy command to complete.

We created a helper.py script to let you easily create and export environment variables to make subsequent commands easier. Run the script, and copy the output to your terminal to export variables:

python helper.py

Navigate up to the main directory for this recipe (out of the “cdk-AWS-Cookbook-605” directory)

cd ..

Clean up

Delete the CodeDeploy deployment group and application:

aws deploy delete-deployment-group \
--deployment-group-name awscookbook-605-dg \
--application-name awscookbook-605

aws deploy delete-application --application-name awscookbook-605

Detach the IAM policy from and delete the role used by CodeDeploy to update your application on Amazon ECS:

aws iam detach-role-policy --role-name ecsCodeDeployRole \
--policy-arn arn:aws:iam::aws:policy/AWSCodeDeployRoleForECS

aws iam delete-role --role-name ecsCodeDeployRole

Now remove the load balancer rules created by CodeDeploy during the deployment and the target group you created previously:

aws elbv2 delete-rule --rule-arn \
$(aws elbv2 describe-rules \
--listener-arn $PROD_LISTENER_ARN \
--query 'Rules[?Priority==`"1"`].RuleArn' \
--output text)

aws elbv2 modify-listener --listener-arn $TEST_LISTENER_ARN \
--default-actions Type=forward,TargetGroupArn=$DEFAULT_TARGET_GROUP_ARN

aws elbv2 delete-target-group --target-group-arn \
$(aws elbv2 describe-target-groups \
--names "GreenTG" \
--query 'TargetGroups[0].TargetGroupArn' \
--output text)

Delete the Blue and Green images:

aws ecr batch-delete-image --repository-name aws-cdk/assets \
--image-ids imageTag=$(echo $BLUE_IMAGE | cut -d : -f 2) \
imageTag=$(echo $GREEN_IMAGE | cut -d : -f 2)
`

### Go to the cdk-AWS-Cookbook-605 directory
`cd cdk-AWS-Cookbook-605/`

### To clean up the environment variables, run the helper.py script in this recipe’s cdk- directory with the --unset flag, and copy the output to your terminal to export variables:

`python helper.py --unset`

### Use the AWS CDK to destroy the resources, deactivate your Python virtual environment, and go to the root of the chapter:

`cdk destroy && deactivate && rm -r .venv/ && cd ../..`