share-vpc.sh is a script developed to help automate the sharing of VPC networks and subnets with other projects in GCP.

This tool is provided without any warranty, make sure you review the script code and test accordingly with your requirements. Always make sure you have backups and have validated recovery from those backups before running, especially in production environments.

• Make sure you know the host project id, child project id , and finally the network and subnet you wish to share.
• Clone the repository, and make sure you install the Google cloud SDK (or, just run the script from CloudShell).
• If running outside of cloud shell, authenticate by running "gcloud auth login"
• Use format:
  • ./share-vpc.sh -h <host project> -c <child project> -n <network to share> -s <subnet to share>

• -h <host project>: This is the project ID of the host project, which will share its networks and subnets with other child projects"
• -c <child project>: Project ID of the child project, who will create resources in the parent project's network and subnets"
• -n <network to share>: Name of the network in the host project that will be shared"
• -s <subnet to share>: The specific subnet name you wish to share"

• -k: Enables kubernetes integration for GKE to access the shared subnets
• -z: Run the script in "ZOMG" mode, which bypasses all the preflight checks and will attempt to run as-is. HIGHLY discouraged in production.

./share-vpc.sh -h shared-svc-project -c my-app-project -n shared-vpc-network -s app-project-subnet    
   - This share the subnet 'app-project-subnet' with the my-app-project, allowing resources to connect to the shared-vpc-network

./share-vpc.sh -h shared-svc-project -c my-app-project -n shared-vpc-network -s app-project-subnet -k -z    
   - Same share as 1st example, but now we are running in 'ZOMG' mode (-z), where validation is skipped.
   - Enabled GKE sharing with the -k flag, where GKE clusters in child project may now access the subnet 'app-project-subnet'

• Eric VanBergen - Github - Personal

This project is licensed under the Apache 2 License - see the LICENSE.md file for details