goDocker: a DIY Docker from scratch using Golang

A homemade Docker

Link to GitHub

• Used Git to track the development process
  • Created branches to isolate the development process from master brach
  • .gitignore to ignore executive from being tracked
  • push to remote Git server (Github)
• Created subsystem containers, isolated from the host system with the help of Linux system call
  • Namespace to isolate Linux kernel resources like PID, User ID, Network etc.
  • Cgroups to manage the hardware usages of each container
  • AUFS to create a stack-like file system for Docker image stacks
• Implemented the main features of a real Docker
  • run: initiate a container from an image
    • -ti: create a contianer in interative mode
    • -d: detached mode
    • -m, —cpuShare, —cpuSet: limit the memory, CPU usages, CPU Set
    • -v: Shared volume
    • -name: set the conatiner’s name
  • ps: list the running, stopped containers
  • log: view the log of each containers
  • exec: reenter the container’s Namespace
  • stop: stop the container
  • remove: remove an stopped container
• Virtual network supported
  • Create: create new virtual network interface, in my project, bridge is supported
  • List: list all created network devices
  • You can configure the port forwording just like what you can do in real Docker
  • Connect the containers to existed devices
• Deployed a Nginx web server on my goDocker!
  • Commit a Nginx container from real Docker to goDocker’s image
  • run the image and server is up!
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• Handled logs by Golang library logrus