Cross-Project Cloud SQL Connection with Private Service Connect and Terraform

In the rapidly evolving landscape of cloud infrastructure, establishing secure and efficient cross-project connections is paramount. This guide delves into setting up a cross-project Cloud SQL connection via Private Service Connect, juxtaposed with other methodologies such as Cloud VPN and Cloud SQL Auth Proxy for context.

Alternatives for Cloud SQL Connection:

  • Cloud VPN offers straightforward implementation but may suffer from bandwidth limitations impacting performance.
  • Cloud SQL Auth Proxy facilitates ease of connection and leverages IAM for authorization, yet it may pose scalability challenges and become cumbersome with a substantial number of SQL instances.
  • Private Service Connect stands out for its scalability and secure cross-project communication capabilities, albeit with a more complex initial setup and some limitations in SQL instance configuration via the GCP Console.

Setting the Stage:

Ensure you have Terraform (~> 5.7.0) and gcloud installed, and two GCP projects ready for this setup. We’ll use “Project A” for hosting a Cloud SQL MySQL instance and “Project B” for the networking components and Private Service Components, alongside a test instance.
The setup is available on GitHub:

Terraform Configuration:

Then, create a Cloud SQL MySQL instance in Project A with specific settings, including psc_config for Private Service Connect and a root user named “test”:

In Project B, establish the networking foundation with a VPC, subnet, Cloud NAT, and Cloud Router for internet access, necessary for the test instance to install MySQL client:

Set up the Private Service Connect components in Project B:

Implementation Steps:

  • Clone the GitHub repository.
  • Add a terraform.tfvars file with the necessary values.
  • Authenticate with gcloud and initialize Terraform.
  • Review and apply the Terraform plan.
  • Retrieve the MySQL user password and verify the connection on the test instance.

    For further insights and guidance, refer to Google Cloud’s official documentation on Cloud SQL with PSC.

    Whether you’re looking to implement cross-project Cloud SQL connections using Private Service Connect or seeking tailored solutions to enhance your cloud infrastructure, Oredata’s team of experts is equipped to guide you through every step of the process. Their proven track record in delivering cutting-edge cloud solutions ensures that your projects are not just compliant with the best industry practices but are also optimized for efficiency, security, and scalability. You can get detailed information by contacting Ordata experts immediately.

    Author: Atakan Tatlı, Senior Cloud DevOps Engineer at Oredata

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