gRPC example

This section explains how to use Traefik and linkerd as reverse proxy for gRPC application

Traefik

Traefik Server bench

Traefik http

Launch traefik and grpc server

docker-compose -f docker-compose-traefik.yml up

Server hello listen on port :7777

Server world listen on port :7778

Traefik listen on port :4140

client -> Traefik -> Hello -> traefik -> World

Use it

Launch Client

./curl localhost:4140/toto

Traefik gRPC

Launch traefik and grpc server

docker-compose -f docker-compose-traefik-grpc.yml up

Server hello listen on port :7777

Server world listen on port :7778

Traefik listen on port :4140

client -> Traefik -> Hello -> traefik -> World

Use it

Launch Client

helloworld-client 127.0.0.1:4140

See error

Note/Issues

Traefik redirect only to an http server over http2

Traefik don't manage grpc protocol. We can't define grpc route

Linkerd

Linkerd Server bench

Linkerd gRPC

Launch Linkerd and grpc server

 docker-compose -f docker-compose-linkerd.yml up

Server hello listen on port :7777

Server world listen on port :7778

Linkerd listen on port :4140

client -> Linkerd -> Hello -> Linkerd -> World

Use it

Launch Client

go get -u github.com/linkerd/linkerd-examples/docker/helloworld/helloworld-client

helloworld-client 127.0.0.1:4140

Tips

Greeter client came form google.golan.org/grpc/examples has been modified to send request to frontend.local:4443

./greeter_client

Greeter Server came form google.golan.org/grpc/examples has been modified to received request to :50051

./greeter_server&

gRPC Server certificat

Autosigned certificate has been generated for frontend.local and backend.local

Traefik Error

hello_1    | 2017/10/01 12:40:41 transport: http2Client.notifyError got notified that the client transport was broken read tcp 172.20.0.4:36840->172.20.0.3:4140: read: connection reset by peer.
hello_1    | 2017/10/01 12:40:41 transport: http2Client.notifyError got notified that the client transport was broken unexpected EOF.
hello_1    | 2017/10/01 12:40:41 grpc: addrConn.resetTransport failed to create client transport: connection error: desc = "transport: write tcp 172.20.0.4:36844->172.20.0.3:4140: write: broken pipe"; Reconnecting to {traefik:4140 <nil>}