Envoy XDS in Haskell

The base project for GRPC is cloned from: https://github.com/lucasdicioccio/warp-grpc

openssl genrsa -out key.pem 2048
openssl req -new -key key.pem -out certificate.csr
openssl x509 -req -in certificate.csr -signkey key.pem -out certificate.pem

Then you can build and run the example.

stack build
stack exec -- envoy-xds

Now you can query it on 127.0.0.1:3000 with TLS, for instance with https://github.com/lucasdicioccio/http2-client-grpc-example .

Envoy XDS

Folder structure:

• gen - Contains generated protobuf .hs files. Generate the .hs files from the following project: https://github.com/sriduth/data-plane-api

Configuration Options

Currently the system needs following parameters passed in as environment variables

1) APP_MODE:

	Must be either 'FULL_XDS' or 'ACCESS_LOG'

2) XDS_LOGS_PATH

   Path where the XDS server can write it's own logs
   
3) GRPC_LOGS_PATH

   Path to a folder where the requests to the XDS are logged.
   
4) ACCESS_LOGS_PATH

   Path to folder where the access logs of envoy instances will be written.
   Log files created will be in the format: `<ip-of-envoy-host>_access.log`

This implementation currently supports CDS and RDS functionalities in a very basic manner using GRPC.