Envoy gRPC JSON transcoder with 2 Golang services

takes in HTTP JSON request - transcodes to gRPC with Envoy proxy and sends requests to different Golang services connected to Postgresql Databases

The Task

Running the services

cd into both the service directories (go-txnmgmt-grpc, go-usermgmt-grpc) and run

go mod tidy

this will install dependencies and packages. Now, Create two postgresql databases and update the connection strings of the servers of both the service

go-usermgmt-grpc > usermgmt_server > usermgmt_server.go > func main() > database_url

go-txnmgmt-grpc > txnmgmt_server > txnmgmt_server.go > func main() > database_url

If the proto files are changed then generate .pb file with this example command (assuming protoc already installed)

protoc -I txnmgmt/googleapi/ -I txnmgmt/ --include_imports --descriptor_set_out=txnmgmt/txnmgmt.pb txnmgmt/txnmgmt.proto

& generate pb.go file with

protoc -I txnmgmt/googleapi/ -I txnmgmt/ txnmgmt/txnmgmt.proto --go_out=plugins=grpc:txnmgmt

Now, run the services with

go run go-usermgmt-grpc/usermgmt_server/usermgmt_server.go
go run go-txnmgmt-grpc/txnmgmt_server/txnmgmt_server.go

To avoid complexity I didn't use any go client - instead I used Insomnia to make gRPC calls. check this video for help.

Running Envoy

Finally, use given yaml file to transcode RESTful JSON API to gRPC using Envoy

envoy --config-path transcode_to_gRPC.yaml

Now, test the endpoints using the given json collection file in the http-request-collection directory & see the ✨Magic✨

N.B. Being new in Golang, I didn't add dependency folders to .gitignore in fear of version mismatch issues. Due to this cloning may take longer than expected

rafian-git/Envoy-gRPC-JSON-transcoder-with-2-Golang-services

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