Learning by Pulling Things Apart
summary
Explains how a Dockerfile becomes an image by tracing each statement into layers and a manifest and shows the actual toolchain used: buildctl with moby/buildkit runs as a daemon, LLB serves as an LLB intermediate representation analogous to LLVM IR, and buildctl outputs images that are pushed and run. Demonstrations include a Go program that generates LLB, five example builds built and run successfully, and a custom syntactic front end called ic file (INTERCAL‑inspired) that compiles to LLB. Proposes building serverless workflows by programmatically producing images in a few hundred lines.
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chapters (12)
- 0:00Introduction to talk
- 1:10Containers vs container images
- 2:54How executables are created
- 5:19BuildKit and compiler analogy
- 10:53Standard Docker build demo
- 12:20Direct BuildKit build demo
- 15:10LLB intermediate representation
- 18:18Programmatic LLB build demo
- 20:43Custom front-end compilers
- 22:11Building a custom syntax front end
- 26:45Future of containerization
- 28:50Call to build something
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