[Feature Request] add golang client

[jendrikjoe]

Describe the proposal

I would love to have a Go client for the mlflow API, as it would allow to fetch infos over available runs directly from Go, which would be a great advantage for people implementing microservices in Go.
It should be straight forward to generate this client from the .proto files.
I am currently working on getting this ready. I would be happy to as well add this to the mlflow repository, if it is of interest for you.

Motivation

We are using mlflow in a cloud setting which we are testing with terratest. For this it would come in handy to have a Go client of mlflow. I can imagine that the same applies to services written in Go and somehow handling mlflow data.

Proposed Changes

A folder should be added containing the golang client and the option go_package has to be added to the .proto files. It would be generated from the .proto files using the protoc-gen-go project and the commands:

protoc -I="$PROTOS" \
    --go_out=plugins=grpc,paths=source_relative:"$GOPATH/src" \
    "$PROTOS"/databricks.proto \
    "$PROTOS"/service.proto

protoc -I="$PROTOS" \
    --go_out=plugins=grpc,paths=source_relative:"$GOPATH/src" \
    "$PROTOS"/scalapb/scalapb.proto

which can be added to the generate_protos.sh. They have to be separate calls due to this issue: golang/protobuf#39.

[anggao]

Any update for this, we'd like to use this client as well

[dbczumar]

We do not currently have plans to implement and upstream a golang client into the core MLflow project, but we'd be very excited to advise during the development of a third-party golang client for MLflow and provide a link to it in the MLflow docs.

[nfx]

@jendrikjoe i've created Go SDK for Databricks and there's full mlflow api coverage - enjoy https://pkg.go.dev/github.com/databricks/databricks-sdk-go/service/ml