I'm trying to send gRPC requests with Postman to my backend, which used an Envoy as the gateway. I have a domain name, which points to the gateway.
When I send a gRPC request with Postman, it works as expected.
As you see, I get the response.
However, if I tried to send a gRPC request with pure IP, I always got an gRPC error 12.
As you see, I used the pure IP, which is exactly the IP address of my domain name, and I set the authority in the metadata of request. However, it didn't work.
I checked the log of Envoy and I found that the gRPC request had the wrong authority value. Its value was 111.111.111.111:2222, which should have been www.example.com:2222. Envoy can't find a route rule for this authority, this is why I got the error.
I'm confused now. I set authority in metadata but it doesn't seem to work as expected...
I've google a lot about grpc and Postman, but I didn't find anyting useful about this issue.