commit 7eaa407ed5642746dd8bedd3fe3af635729e6e26
author Robert Kolchmeyer <rkolchmeyer@google.com> Wed Nov 12 14:47:48 2025 -0800
committer Robert Kolchmeyer <rkolchmeyer@google.com> Thu Nov 13 16:26:53 2025 -0800
tree d87b0def40f03b41ddd1a0795f0bdc6f9d71eef6
parent 79c39f7db3ab12cc11f0add7cf923eb81e4103f9

Implement functionality for creating an env reader from a VM image

This uses a daisy workflow to boot the image and extract metadata from
the VM.

To avoid the VM needing GCS write access, we send the data back to daisy
by base64 encoding it and outputting it to the serial console. Daisy
forwards those logs to stdout, and cos-customizer can decode the data
from there.

Booting a VM is the only reliable way to identify the version and board
for a particular image, especially considering this needs to work with
GKE preloaded images.

BUG=b/450899734

Change-Id: I9d9982d807c481a0e5b815501a13cf552c271145
Reviewed-on: https://cos-review.googlesource.com/c/cos/tools/+/118202
Tested-by: Robert Kolchmeyer <rkolchmeyer@google.com>
Cloud-Build: GCB Service account <228075978874@cloudbuild.gserviceaccount.com>
Reviewed-by: He Gao <hegao@google.com>