File I/O example

This directory demonstrates several Docker topics:

• The usefulness of volume mechanism in Docker.
• The docker logs command.

Steps

1. Run without Docker

   $ ./io.sh
   $ ./io.sh
   $ ./io.sh
   
   $ cat /tmp/output

2. Run with Docker, without volume mechanism

   $ docker build -t io .
   
   $ docker run io
   $ docker run io
   $ docker run io
   
   $ cat /tmp/output
   
   $ docker ps -a
   $ docker logs <container id>

3. Run with Docker, with volume mechanism

   $ docker run  -v $(pwd):/tmp  io
   $ docker run  -v $(pwd):/tmp  io
   $ docker run  -v $(pwd):/tmp  io
   
   $ cat ./output
   
   $ docker ps -a
   $ docker logs <container id>