Pauses and resumes HTTP connections to allow zero downtime deployments with schema migrations. Inspired by How Balanced does Database Migrations with Zero-Downtime.
docker run -d --name tap -e FRONTEND_BIND="0.0.0.0:80" -e BACKEND_SERVER="127.0.0.1:8000" --net host tutum/http-tap
Will listen in http://0.0.0.0:80 and forward requests to http://127.0.0.1:8000
To pause all connections:
docker exec tap pause
To resume all paused connections:
docker exec tap resume