Creating Ubuntu and Debian Container Base Images - The Old and Simple Way

Learn how to create custom Ubuntu and Debian container base images using simple tools like debootstrap and multistrap. Explore the process of building root filesystems tailored to your needs, gaining a deeper understanding of container construction and debugging. Discover techniques to avoid common pitfalls and optimize your builds and testing procedures. Through worked examples, master the creation of bootable root filesystems and explore options for immediate use, improvements, and simple booting methods. Gain insights into building VM disk images and leveraging libvirt and LXC for container management.

Intro
What is a base image?
Why build your own?
What options do I have?
debootstrap
multistrap
Compare the two tools
Immediately Useful
But not without issues
Improvements
fixup
customise
minimise
instantiate
Simple boot
Using libvirt +LXC
Can also be used to build VM disk images