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diff --git a/docs/sources/grpc-client.md b/docs/sources/grpc-client.md new file mode 100644 index 00000000..3b48129a --- /dev/null +++ b/docs/sources/grpc-client.md @@ -0,0 +1,98 @@ +# Managing GoBGP with Your Favorite Language + +This page explains how to create your own GoBGP client. +You can create a client using gRPC in several languages that you choose. +Currently there are instructions for making a client in Python and Ruby in this page. +It assumes that you are on Ubuntu 14.04(64bit). + +## Python + +### Installing LinuxBrew + +We use LinuxBrew to simplify the instruction. +```bash +$ sudo apt-get update +$ sudo apt-get install -y build-essential curl git python-dev python-pip m4 ruby +$ ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/linuxbrew/go/install)" +$ export PATH=$HOME/.linuxbrew/bin:$PATH +$ brew doctor +``` +It's useful to add '$HOME/.linuxbrew/bin' to your PATH environment variable. + +And then add configuration to load libs under '.linuxbrew'. +``` +$ echo "$HOME/.linuxbrew/lib" | sudo tee /etc/ld.so.conf.d/grpc.conf +$ sudo ldconfig +``` + +### Installing gRPC and Python Libraries + +We install gRPC and python liblaries in python virtual environment by using LinuxBrew. +These steps are based on [gRPC HomeBrew](https://github.com/grpc/homebrew-grpc). + +```bash +$ sudo apt-get update +$ sudo apt-get install python-virtualenv +$ cd $GOPATH/src/github.com/osrg/gobgp/tools/grpc/python +$ virtualenv venv +$ source ./venv/bin/activate +$ curl -fsSL https://goo.gl/getgrpc | bash -s python +$ sudo ldconfig +``` + +### Generating Stub Code + +We need to generate stub code GoBGP at first. +```bash +$ cd $GOPATH/src/github.com/osrg/gobgp/tools/grpc/python +$ GOBGP_API=$GOPATH/src/github.com/osrg/gobgp/api +$ protoc -I $GOBGP_API --python_out=. --grpc_out=. --plugin=protoc-gen-grpc=`which grpc_python_plugin` $GOBGP_API/gobgp.proto +``` + +### Get Neighbor + +Here is an example for getting neighbor's information and we assumed that it's created in 'get_neighbor.py' under '$GOPATH/src/github.com/osrg/gobgp/tools/grpc/python'. +```python +import gobgp_pb2 +import sys + +_TIMEOUT_SECONDS = 10 + + +def run(gobgpd_addr, neighbor_addr): + with gobgp_pb2.early_adopter_create_Grpc_stub(gobgpd_addr, 8080) as stub: + peer = stub.GetNeighbor(gobgp_pb2.Arguments(rf=4, name=neighbor_addr), _TIMEOUT_SECONDS) + print("BGP neighbor is %s, remote AS %d" % (peer.conf.remote_ip, peer.conf.remote_as)) + print(" BGP version 4, remote router ID %s" % ( peer.conf.id)) + print(" BGP state = %s, up for %s" % ( peer.info.bgp_state, peer.info.uptime)) + print(" BGP OutQ = %d, Flops = %d" % (peer.info.out_q, peer.info.flops)) + print(" Hold time is %d, keepalive interval is %d seconds" % ( peer.info.negotiated_holdtime, peer.info.keepalive_interval)) + print(" Configured hold time is %d, keepalive interval is %d seconds" % ( peer.conf.holdtime, peer.conf.keepalive_interval)) + print("") + +if __name__ == '__main__': + gobgp = sys.argv[1] + neighbor = sys.argv[2] + run(gobgp, neighbor) +``` + +We need to import gobgp_pb2 and call 'early_adopter_create_Grpc_stub' in your code. + +Let's run this script. + +```bash +$ source ./venv/bin/activate +(venv)$ python get_neighbor.py 10.0.255.1 10.0.0.1 +BGP neighbor is 10.0.0.1, remote AS 65001 + BGP version 4, remote router ID 192.168.0.1 + BGP state = BGP_FSM_ESTABLISHED, up for 9042 + BGP OutQ = 0, Flops = 0 + Hold time is 30, keepalive interval is 10 seconds + Configured hold time is 30, keepalive interval is 10 seconds + +D0821 12:31:07.821508149 91029 iomgr.c:119] Waiting for 1 iomgr objects to be destroyed and executing final callbacks + +``` + +We got neighbor information successfully. + |