control-usb-root

This repo contains the artifacts from flatcar that we in hedgehog use to build our images. Vlab VMs, control node, and gateway node.

Steps to bump the latest version

The flatcar version number is saved in two files, justfile and the gen-control-usb-root.sh. Keep them updated and matching.

1. Select the desired stable release number from their stable releases for example 4152.2.2
2. edit the justfile to include the selected relase, e.g. 4152.2.2
3. edit the gen-control-usb-root.sh to include the selected release
4. git tag -s v4152.2.2-hh1 -m 'bumping flatcar'
5. git push origin v4152.2.2-hh1
6. The CI is setup to run just push after a tag has been pushed so that the artifacts are generated and sent to oras
7. go to the fabricator repo and update the existing tag to the tag pushed in the previous step. At the time of writing it is in 3 places, across two files. pkg/fab/README.md and pkg/fab/versions.go. The real test is to run just test inside of fabricator to ensure all locations are in sync.

Notes

gen-control-usb-root.sh is intended to run on ubuntu, it uses the command grub-install. On Red Hat based distros this identical command is named grub2-install. Additionally the Red Hat based distributions use grub2 in the file paths, this subtle difference is irksome.

Contents of this repo

• images/ - this directory contains a file, efi.img. That file is placed inside the root of the iso which is what allows us to boot an iso from a UEFI based system. efi.img is not expected to changed often. It is created via efi_img_iso9660 in the gen-control-usb-root.sh the function is run in the normal course of execution.
• flatcar_production* - these files are release artifacts downloaded from flatcar.org
• boot - directory containing files needed to boot flatcar. This is generated by the script control-usb-root.sh
• EFI - directory containing files needed to boot flatcar. This is generated by the script control-usb-root.sh