Demystifying Systemd for Embedded Systems
summary
Shows how to strip systemd down to a usable footprint and compares that to stitching busybox and shell scripts together. Claims a full-featured setup compiles to about 3.9 MB systemd binary after disabling journal and udev, with intermediate builds at 7.4 and 5.4 MB; provides configure flags and a Github repo with the exact build scripts and unit-file fragments. Demonstrates where busybox solutions fail to scale (networking, socket activation, timers, hotplug) and offers a tiny alternative — an Aletta-style single-binary init at ~100 KB single-binary init that boots, loads modules and brings up networking.
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chapters (26)
- 0:00Introduction
- 0:13Systemd bandwagon
- 0:49Who am I
- 3:38Embedded Systems
- 4:24Medical Equipment
- 7:04More than one application
- 7:29Background
- 11:04ILP Embedded
- 12:13Preconfigured
- 14:14Containers
- 16:22Systemd Myths
- 19:04Do you really need Systemd
- 22:28Whats inside Systemd
- 24:35Disabling help
- 25:16Manual inspection
- 27:32Config size
- 28:17Systemd
- 29:53Busybox
- 30:38Networking
- 32:22System uses
- 33:20File formats
- 34:26Tiny systems
- 36:58Developer
- 38:24Mozo
- 40:58Systemd overheads
- 42:45Systemd binary format
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