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timothyleung1/grpc_json_transcoder: Use envoy to take JSON requests and convert to gRPC for backend micro-services. · GitHub

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bin
bin
 
 
client
client
 
 
config
config
 
 
script
script
 
 
service
service
 
 
Dockerfile-grpc
Dockerfile-grpc
 
 
Dockerfile-python
Dockerfile-python
 
 
README.md
README.md
 
 
docker-compose.yml
docker-compose.yml
 
 

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Envoy grpc_json_transcoder example project

  1. Build proto (Optional, I have done this for you but you have to rebuild it if you make changes to the protofile)

    sudo pip install grpcio requests
cd service
./script/gen
./script/gen_kv.pb
cd -

  2. Build go service (Optional, I have built this for you, feel free to rebuild it if security is a concern for you)

    script/bootstrap
./script/build

  3. Startup docker-compose

    docker-compose up --build

  4. Do request

    docker-compose exec python /client/client.py set foo bar
docker-compose exec python /client/client.py get foo
docker-compose exec python /client/client.py count

Explanation

  1. Python client sends JSON request to Envoy proxy at port 9001.
  2. Envoy proxy convert the JSON request using the provided proto and the grpc_json_transcoder filter.
  3. The grpc requests are then forwarded to your microservice cluster which is running a grpc server.

TODO

  • Build proto in grpc container instead.
  • Guide on deploying to GCP

Caveats

  • Using envoy 1.17 as the docker base image. envoyproxy/envoy-dev:latest is recommended.

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Use envoy to take JSON requests and convert to gRPC for backend micro-services.

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