Qemu-guest-agent is missing in QEMU aarch64 image

[sergey-cheperis]

Description

Per https://www.flatcar.org/docs/latest/setup/customization/acpi/, images should include qemu-guest-agent which is enabled when org.qemu.guest_agent.0 virtio port is present. However, the flatcar_production_qemu_uefi_secure_image.img image for aarch64 does not contain it.

Impact

Guest automation depending on the guest agent does not work.

Environment and steps to reproduce

1. Run Flatcar from flatcar_production_qemu_uefi_secure_image.img for aarch64 archictecture. The version being tested is 4081.2.0. Use the following qemu args to add the virtio port:

-chardev socket,host=localhost,port=4444,server=on,wait=off,id=vp0
-device virtio-serial
-device virtserialport,chardev=vp0,name=org.qemu.guest_agent.0

3. Log in to the VM with SSH.
4. Ensure ls -la /dev/virtio-ports/ shows the org.qemu.guest_agent.0 port.
5. Ensure which qemu-guest-agent does not show anything, neither does pgrep qemu.

Expected behavior

A qemu-guest-agent executable exists and is started.

[tormath1]

Hi @sergey-cheperis and thanks for the report! Here's the fixing PR: flatcar/scripts#2490, I will discuss with Flatcar folks but there is a high chance to backport the fix on all channels (alpha, beta, stable and LTS).

A CI job is running to build the image, would you be able to test the ARM64 image to see if it brings the qemu-guest-agent ?

EDIT: Here's the image if you want to try: https://bincache.flatcar-linux.net/images/arm64/9999.0.101+tormath1-guest-agent-arm/flatcar_production_qemu_uefi_secure_image.img

[sergey-cheperis]

Hi Mathieu, thanks a lot you for handling this so fast. I can confirm that in this image the issue is resolved.