Name: Overlay Images To the Rescue - Frank Vasquez, Packt
Start: 2025-06-25T15:05:00-0600
End: 2025-06-25T15:45:00-0600

June 23 - 25, 2025
Denver, Colorado
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Note: The schedule is subject to change.

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IMPORTANT NOTE: Timing of sessions and room locations are subject to change.

Wednesday June 25, 2025 3:05pm - 3:45pm MDT

Bluebird Ballroom 2A

The Yocto project offers unparalleled flexbility in how you structure your embedded Linux image builds. Yocto's multilayered approach enables us to build different images for different purposes (e.g. development, production, etc). This flexibility extends beyond the image build process out to runtime.

What if you could load debug symbols onto an edge device? Restart your application with gdbserver? Start bpftrace sessions? Connect to a VPN? All at the press of a button? You can through the magic of systemd and overlayfs. systemd-sysext activates and deactivates system extension images merging them together to compose the contents of your /usr/ and /opt/ directories.

By separating your root filesystem into individual layers that each do one thing and one thing only, you can respond to trouble by reconfiguring your system at runtime. I will show you how to leverage system extension images and btrfs subvolumes to build Yocto images that can be reassembled on demand.

Speakers

Frank Vasquez

Technical Author and Independent Consultant, Packt

Frank Vasquez is a software engineer and published author with over a decade of experience designing and building embedded Linux systems. During that time, he has shipped numerous products including a rackmount DSP audio server, a diver-held sonar camcorder, a consumer IoT hotspot... Read More →

Wednesday June 25, 2025 3:05pm - 3:45pm MDT
Bluebird Ballroom 2A

Embedded Linux Conference

Audience Experience Level Intermediate

Open Source Summit North America 2025

Frank Vasquez

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