linkerd-grpc

The repository demonstrates on how to do a simple linker-to-service load balancing:

• linker-to-linker-no-tls (through namerd)
• linker-to-service
• linker-to-service-through-namerd

Proto Example

syntax = "proto3";

package echo;

service Echo {
	rpc Greet (GreetRequest) returns (GreetResponse) {}
}

message GreetRequest {
	string text = 1;
}

message GreetResponse {
	string text = 1;
}

Run

We have a pre-built nodejs grpc image for both the server and client.

$ docker-compose up -d

Validate Client

$ docker logs $(docker ps -a -q --filter name=client)

Output:

greeting from 7203bbf57d87: Hello, John Doe

Validate Server

$ docker logs $(docker ps -a -q --filter name=server)

Output:

7203bbf57d87 listening to port 0.0.0.0:50051. press ctrl + c to cancel.
got metadata: secret {"_internal_repr":{"authorization":["secret"],"user-agent":["grpc-node/1.10.1 grpc-c/6.0.0-pre1 (linux; chttp2; glamorous)"],"l5d-dst-service":["/grpc/echo.Echo/Greet"],"via":["h2 linkerd"],"l5d-dst-client":["/$/inet/server/50051"],"l5d-dst-residual":["/echo/Greet"],"l5d-ctx-trace":["T1qG2D+FkK4T0LfTj5bJRBPQt9OPlslEAAAAAAAAAAA="],"l5d-reqid":["13d0b7d38f96c944"]}}