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You are developing an application using App Engine and Cloud SQL for PostgreSQL. Before deploying new versions to the shared development environment, you want to test your application code locally while ensuring all traffic to Cloud SQL instances remains encrypted and authenticated via Cloud IAM and PostgreSQL. What steps should you take before launching the local development server?
A
Install PostgreSQL on your local workstation. Run a local PostgreSQL database on your workstation. Configure the application to connect to a PostgreSQL instance on localhost.
B
Download and install the Cloud SQL Auth Proxy to your local development environment. Configure the Cloud SQL Auth Proxy to connect to the Cloud SQL instance and run the proxy. Configure the application to connect to a PostgreSQL instance on localhost.
C
Deploy a Compute Engine instance, and install HAProxy on the instance. Configure Cloud SQL Auth Proxy on the instance, and use the instance’s service account to authenticate to Cloud SQL. Configure the application to connect to the Compute Engine instance's IP address.
D
Configure your local development server to connect to the private IP address of the Cloud SQL instance. Encrypt database entries with a cryptographic library before submitting them to the database. Store the decryption key as an environment variable in App Engine.