Sites:

https://grpc.io/
https://grpc.io/docs/languages/go/quickstart/
https://developers.google.com/protocol-buffers
https://developers.google.com/protocol-buffers/docs/gotutorial
https://github.com/ktr0731/evans

Repositórios:

https://github.com/robsoninocencio/grpc
https://github.com/codeedu/fc2-grpc

Rodar estes comandos após criar ou alterar um arquivo.proto

protoc --proto_path=proto proto/*.proto --go_out=pb
protoc --proto_path=proto proto/*.proto --go_out=pb --go-grpc_out=pb

Rodar o servidor GRPC

go run cmd/server/server.go

Como instalar client grpc do evans:

Site para baixar o client do evans:

https://github.com/ktr0731/evans/releases/tag/0.9.3

tar xvzf evans_linux_amd64.tar.gz
mv evans /usr/local/bin/evans
export PATH=$PATH:/usr/local/bin/evans
source ~/.zshrc

Rodar o client GRPC do evans

evans -r repl --host localhost --port 50051
service UserService
call AddUser

Rodar nosso client GRPC

go run cmd/client/client.go