Azure Web App - Connect to Azure Managed Instance SQL DB

PhilFancyAndMe 

Refer on below on some recommdanations:

1. Use Virtual Network Integration:

   • Integrate your Web App with a Virtual Network: This allows your Web App to access resources in the virtual network where your SQL Managed Instance is located.
   • Follow the steps in this tutorial to set up VNet integration for your Web App.

2. Private Endpoint for SQL Managed Instance:

   • Ensure that you have correctly set up a private endpoint for your SQL Managed Instance. This allows your Web App to securely connect to the SQL Managed Instance over a private IP address.
   • You can follow this guide to set up and configure private endpoints.

3. Managed Identity:

   • Use a managed identity for your Web App to securely connect to the SQL Managed Instance without storing credentials in your code.
   • Assign a system-assigned or user-assigned managed identity to your Web App and grant it access to the SQL Managed Instance.
   • To configure managed identity for your Web App and grant it access to the SQL Managed Instance.

4. Network Security Groups (NSGs):

   • Ensure that the Network Security Groups (NSGs) associated with your virtual network and subnets allow traffic between your Web App and the SQL Managed Instance.
   • You might need to create inbound and outbound rules to permit traffic on the necessary ports (e.g., port 1433 for SQL Server).

5. DNS Configuration:

   • Ensure that your Web App can resolve the private endpoint DNS name of your SQL Managed Instance. You might need to configure custom DNS settings or use Azure DNS.

6. Connection Strings:

   • Update your Web App’s connection strings to use the private endpoint’s IP address or DNS name.
   • Ensure that the connection string includes the necessary parameters for secure connections, such as Encrypt=True and TrustServerCertificate=False.