This project shows how to create a minimal Docker image containing a C++ gRPC service.
This demo is intended for Linux systems only. It may work on other operating systems using some form of virtual machine, but I have not tested it.
You must have Docker installed on your workstation. I have only tested the Docker files with 18.09, but any version greater than 17.05 should work.
First we create a Docker image with all the development tools necessary to compile the gRPC server. While it is possible to install all these development tools in your workstation, a Docker image makes the remaining steps easier to reproduce.
This step may take a few minutes, as it builds gRPC and other dependencies:
sudo docker build -t grpc-cpp-devtools:latest -f tools/Dockerfile.devtools toolsOnce the development tools image is created we can use it to create a Docker image with a C++ gRPC server:
sudo docker build -t grpc-cpp-echo:latest -f examples/echo/Dockerfile.server .Note that this image is relatively small:
sudo docker image ls grpc-cpp-echo:latestREPOSITORY TAG IMAGE ID CREATED SIZE
grpc-cpp-echo latest 04d95e5adaa6 4 minutes ago 14.6MBUse docker run to start a container using this image. You may want to detach
from the image using the -d option and capture its id so you can terminate it
later:
ID=$(sudo docker run -d -P grpc-cpp-echo:latest /r/echo_server)Note the mapping of port 7000 to the localhost to ease testing.
The image also contains a small client to demonstrate connecting to it:
ADDRESS=$(sudo docker port "${ID}" 7000)
sudo docker run --network=host grpc-cpp-echo:latest /r/echo_client --address "${ADDRESS}"sudo docker kill "${ID}"
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