BoF: Embedded Update Tools
summary
Overview of practical embedded update tooling and unsolved problems with lots of concrete examples: rauc supports a/b updates and now uses casync/delta updates to minimize cellular data; one deployment updates ~100,000 devices over GSM from ~20 MB images with deltas ranging from a few KB to several MB. Discussion covers using a small rescue partition, strategies for user-data migrations (copy-on-update vs JSON templates), boot-success detection via systemd targets, and tradeoffs of signatures, encryption, and rollback.
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chapters (13)
- 0:00Intro
- 0:30Existing tools
- 5:01Generic topics
- 9:35Additional topics
- 10:57Encryption
- 15:54Migration
- 18:13Configuration files
- 25:14Internet migration
- 27:01User rollback
- 29:18Alternatives
- 33:49Detection
- 40:53SystemLIS
- 47:53Data updates
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