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kevinveenbirkenbachandClaude Opus 5
70f27f82ef
The LUKS step of the DR drill died on `The file /dev/mapper/usbdrill does not exist and no size was specified.` -- from mkfs, not from cryptsetup, because luksOpen had exited 0. The node did have a udev, and it had created the mapper entry: as a symlink to ../dm-1. Modern udev no longer mknods, it only manages symlinks, and the /dev/dm-N target it points at is a devtmpfs node that a container's tmpfs /dev never receives. Without a udev libdevmapper creates the node itself, which is why the debian nodes passed -- their image ships no udevd at all, while arch cannot install systemd without one. Masking udevd in the node image removes the whole class rather than one call site. DM_DISABLE_UDEV rides on the node containers instead of the script because the drill opens the volume a second time through the recover CLI in a separate docker exec, which would not inherit an export. The block-device check then fails loudly with both prerequisites named, and closes the mapping first so an abort cannot leak it onto the runner -- device-mapper is not namespaced and every distro round shares the VM. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>