voltha-protos¶

Protobuf files used by VOLTHA.

Currently this is used to generate both Golang and Python protobufs and gRPC stubs.

The testing process is dependent on specific versions of the protobuf tools, so make sure to use the versions of protoc and protoc-gen-go specified below.

Protobuf definition files are located in protos/voltha_protos directory. This directory hierarchy and import scheme is required to allow the python code generated by the gRPC compiler to have the correct import paths.

NOTE: The protos/google/api directory has files copied from the Google APIs, and is only included for initial compilation of the VOLTHA protobuf files - these API’s should be installed independently via either the python googleapis-common-protos package or the golang go-genproto repo.

Go Environment¶

Get the voltha-protos repository:

mkdir -p ~/source
cd ~/source
git clone https://gerrit.opencord.org/voltha-protos
cd voltha-protos

Setting up the Go environment¶

After installing Go on a Mac or Linux environment, the GOPATH environment variable needs be set. These instructions assume it’s ~/go.

Create a symbolic link in the $GOPATH/src tree to the voltha-go repository:

mkdir -p $GOPATH/src/github.com/opencord
ln -s ~/source/voltha-protos $GOPATH/src/github.com/opencord/voltha-protos

Go Dependencies¶

Install Dependencies¶

Checkout and go install correct version of protoc-gen-go:

GIT_TAG="v1.3.1"
go get -d -u github.com/golang/protobuf/protoc-gen-go
git -C "$(go env GOPATH)"/src/github.com/golang/protobuf checkout $GIT_TAG
go install github.com/golang/protobuf/protoc-gen-go

Building locally¶

Install the protobuf compiler (protoc) 3.7.0 either manually or via the Makefile target (if on Linux amd64). Then build the python and golang stubs:

cd $GOPATH/src/github.com/opencord/voltha-protos
make install-protoc
make build

use dist/*.tar.gz for local python imports use go/ for local go imports

Using voltha-protos in your project¶

Python¶

Installation from Pypi:

pip install voltha-protos

or from a local build:

pip install ~/source/voltha-protos/dist/*.tar.gz

To use it within your code (for example)

from voltha_protos import voltha_pb2

Go¶

go get github.com/opencord/voltha-protos
cd $GOPATH/github.com/opencord/voltha-protos
make build

Protos are importable from github.com/opencord/voltha-protos/v2/go/<packagename>

To use the libraries, import protos with the root path github.com/opencord/voltha-protos/v2/go/

Testing¶

make test will run tests for all languages.