Commits on Nov 9, 2023

1. systemd: stop building gpt-auto-generator to avoid remounting /boot …

   During boot prairiedog figures out which partition bank is in use and
   mounts the correct boot partition containing the kernel binary and
   configuration at /boot. When an x86 system booted via BIOS/CSM, it was
   observed that at some point after boot the EFI System Partition would be
   mounted at /boot instead.
   
   The cause for the unexpected remount is systemd-gpt-auto-generator, a
   generator running during systemd start that creates mount and automount
   units for well-known partition GUIDs. This undoes the work previously
   performed by prairiedog. Convincing gpt-auto-generator to do right by
   Bottlerocket would involve changing partition GUIDs and implementing
   logic for the GPT priority fields. Alternatively, gpt-auto-generator can
   be disabled at boot via the `systemd.gpt_auto=0` kernel command line
   option, leaving the work of mounting partitions to prairiedog and other
   already existing mount units.
   
   Since we would disable the gpt-auto-generator via the kernel command
   line for all variants, we might as well stop building and shipping it.
   Add a local patch to allow selecting/deselecting gpt-auto-generator at
   build-time and actually deselect it.
   
   Signed-off-by: Markus Boehme <markubo@amazon.com>

   

   markusboehme committed Nov 9, 2023
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