A customer is collaborating with another company to build an application on Compute Engine.

Objective: Ensure private communication between application tiers in different GCP Organizations.

Solution: Use VPC peering to enable private communication without traversing the public internet.

Steps:

Step 1: Open the Google Cloud Console.

Step 2: Navigate to the VPC Network Peering page.

Step 3: Create a new VPC peering connection in the project hosting the application tier.

Step 4: Specify the VPC network in the other organization (hosting the storage tier) to peer with.

Step 5: Accept the peering request in the other project.

Step 6: Configure the necessary routes and firewall rules to allow traffic between the peered VPC networks.

VPC peering allows you to connect two VPC networks privately and directly, ensuring that traffic between them does not traverse the public internet.