Support for AB rootfs partitions for OTA updates with Mender

[adeldigital]

Hello,

I’m evaluating the rpi-sb-provisioner for a fleet of Raspberry Pi CM4 devices, and I’m planning to use the Mender OTA update solution. Mender typically uses a dual-rootfs (A/B) layout and switches to U-Boot to handle partition selection, rollback, and safe updates.

I wanted to check if it’s possible to provision devices with a master image that already contains two rootfs partitions (A/B) while still using rpi-sb-provisioner for secure boot and FDU.

Specifically:

Will the provisioning tool correctly handle the dual rootfs layout without overwriting or breaking the AB structure?

Are there recommended steps or configuration options to ensure that secure boot, encryption, and AB partition switching via Mender work together safely?

Cheers

[stu-spp]

Here is some related information about A/B layouts with rpi-image-gen:

raspberrypi/rpi-image-gen#120

If rpi-image-gen is generating the A/B system images, then hopefully rpi-sb-provisioner will be compatible with those operating system images.

[adeldigital]

Thanks for sharing. Looks fresh!