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README.md

Peering Two VPCs Together for Inter-VPC Network Communication

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 “211-Peering-VPCs/cdk-AWS-Cookbook-211” directory and follow the subsequent steps:

cd 211-Peering-VPCs/cdk-AWS-Cookbook-211/
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

Clean up

Delete the security group rule

aws ec2 revoke-security-group-ingress \
--protocol icmp --port -1 \
--source-group $INSTANCE_SG_1 \
--group-id $INSTANCE_SG_2

Delete the Peering connection

aws ec2 delete-vpc-peering-connection \
--vpc-peering-connection-id $VPC_PEERING_CONNECTION_ID

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

Unset your manually created environment variables

unset VPC_PEERING_CONNECTION_ID

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 ../..