Azure API Management - Deploy gRPC API on Azure API management using self hosted gateway

This is a complete guide with steps by step process to deploy the gRPC and how to use Azure API Management to import the gRPC API.

It cover step‑by‑step guide to deploying a gRPC API on Azure API Management (APIM), grounded in the Microsoft documentation and a real-world deployment workflow.

NOTE: This post is published already in GITHUB here. .

Step-2

As a second step we will be building a .NET gRPC client application. You can skip this step in case you already have gRPC client.

If you would like to view .NET Core client used for this sample project, please visit the below .

Please make sure to enable HTTP version, Enable HTTP 2.0 Proxy and add HTTP20_ONLY_PORT application setting as gRPC only work using http2.0 as shown below

2. Calling gRPC from APIM

Typical API deployment steps include the following

• Deploy the self hosted gateway on Azure API management.


• Import the gRPC API in API Management


• Update the .NET gRPC client application to test using API management.


• Since gRPC requires HTTP/2 for inbound and outbound traffic make sure that you enabled HTTP/2 protocol for client traffic.


• Go to API Management(left side blade) Settings → Protocols & Ciphers


• Enable HTTP/2

Step-1

Deploy the self hosted gateway on Azure API management as explianed

Step-3

As a last step update the .NET gRPC client application to test or call the endpoint using API management.

Ref this link

Common ssues & Fixes

APIM cannot route the request

• Cause: .proto mismatch or wrong method name.As


• Fix: Re-import correct .proto.

Backend not reachable

• Cause: HTTP/2 disabled on App Service.


• Fix: Enable HTTP/2 + HTTP2 Proxy.

Testing fails in APIM portal

• Cause: Portal does not support gRPC testing.


• Fix: Use external gRPC client.

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