This project demonstrates concepts for working with multiple containers in Docker using simple Python apps.

You can build by simply entering into the subfolders reader and writer and running docker build . -t reader.

Creating a shared volume sudo docker volume create demo

Creating a shared network sudo docker network create reader-writer

Running writer (exposed) sudo docker run -dit -p 5000:5000 -v demo:/data -e DATA_PATH="data/log.txt" --network=reader-writer writer

Running writer (unexposed) sudo docker run -dit -v demo:/data -e DATA_PATH="data/log.txt" --network=reader-writer writer

Running reader

Non-detached (preferable). Note that WRITER_ENDPOINT should be the IP within the network. sudo docker run -it -v demo:/data -e WRITER_ENDPOINT="http://172.18.0.2:5000" --network=reader-writer reader

*Full process

sudo docker volume create demo
sudo docker network create reader-writer
(in reader & writer folder)
sudo docker build . -t reader
sudo docker build . -t writer
sudo docker run -dit -v demo:/data -e DATA_PATH="data/log.txt" --network=reader-writer writer
sudo docker network inspect reader-writer
(this lets you find the local endpoint)
sudo docker run -it -v demo:/data -e WRITER_ENDPOINT="http://172.18.0.2:5000" --network=reader-writer reader