The Ultimate Container Challenge: An Interactive Trivia Game on OCI, Podman, Docker...
Talkat KubeCon + CloudNativeCon Europe 2025 · on Wednesday, 2025-04-02· at 17:00· Level 0 | ICC Auditorium·
summary
Interactive live quiz with demos that proves three practical surprises: a locally built image shows 22 MB while the pushed registry copy is ~10 MB because the client compresses layers during push; deleting files in a Dockerfile adds a whiteout layer so image size stays almost the same; and multiarch images bundle amd64 and arm64 manifests to run across platforms. Concrete tooling shown: Docker, Podman, ORAS, Crane, Skopeo, Harbor, cosign, SPDX/CycloneDX and demos of pushing, SBOM attach, and signing.
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chapters (10)
- 0:00OCI container quiz intro
- 1:49What is OCI
- 3:16OCI vs Docker
- 4:21OCI vs Docker images
- 7:12Image compression on push
- 11:09RUN RM impact on size
- 13:19Multi-arch images
- 16:55Open-source software bill of materials formats
- 20:53Signing images with Cosign
- 27:11OCI ecosystem tools
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