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fix(deploy): dropbear at boot on initramfs-tools, with dracut's image as the way back (ADR 0039, D20)

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Ubuntu 26.04 builds its boot images with dracut, and dropbear-initramfs needs
initramfs-tools, which replaces it. The host's step 2 now installs
initramfs-tools with cryptsetup-initramfs beside dropbear, sets the boot
image's address in a conf.d file of its own, and checks every new image for
what opens the disk, dropbear, its key and the adapter's driver before any
reboot. Before switching, dracut's image of the running kernel is kept as an
entry in GRUB's menu (shown 5 s, the boot in text), so a failed image is
undone at the iMac without a USB stick.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Signed-off-by: Tizian 「ティツィアーン」 <raisondetredev@pm.me>
This commit is contained in:
Tizian 「ティツィアーン」 2026-11-08 21:10:22 +01:00
commit 0144cea380
Signed by: raisondetredev
GPG key ID: 07F6FCF405488B64
1 changed files with 119 additions and 9 deletions
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deploy/host/initramfs-ip Normal file
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# The boot image's network (ADR 0039, D20), as /etc/initramfs-tools/conf.d/halkyon-ip
# on the instance's host at home: the USB adapter by DHCP, so dropbear is reached at
# balthasar's fixed address (the FRITZ!Box keeps it).
IP=::::balthasar:enx0050b6bffcff:dhcp