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fix(installer): always append separator-free MAC to answerfile hostname 

In answerfile mode the hostname now always gets the machine's MAC appended as
"<name>-<mac>" with the MAC stripped of all separators (colons/dots/dashes), so
fleet deployments from one answerfile stay unique. The default "arch" name now
also receives the suffix, and the dash is only added when a MAC is actually
found (no trailing "-" on NIC-less machines).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
main
Amir Alexander Abdelbaki 2026-06-26 18:43:54 +02:00
parent bc13de7508
commit db4079d543
1 changed files with 14 additions and 7 deletions
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21
setup/archbaseos-guided-install.sh
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@ -127,8 +127,10 @@ get_mac_suffix() {
local mac
mac=$(ip link show 2>/dev/null \
| awk '/^[0-9]+: [^l][^o]/{iface=1} iface && /link\/ether/{print $2; iface=0; exit}')
# Remove colons via bash parameter substitution: ${var//pattern/replacement}.
printf '%s' "${mac//:/}"
# Strip any separator (colon/dot/dash) so the suffix is a bare hex string,
# e.g. "aa:bb:cc:dd:ee:ff" -> "aabbccddeeff". The character class [:.-] matches
# all three common MAC delimiters regardless of how the kernel formats them.
printf '%s' "${mac//[:.-]/}"
}
if $AF_MODE; then
@ -183,12 +185,17 @@ KEYMAPS=(
if $AF_MODE; then
KERNEL=$(af_get '.kernel' 'linux')
RAW_HOSTNAME=$(af_get '.hostname' '')
# Append MAC suffix to make the hostname unique across machines when the same
# answerfile is deployed to a fleet (lab rollout, reinstall, etc.).
if [[ -n "$RAW_HOSTNAME" ]]; then
HOSTNAME="${RAW_HOSTNAME}-$(get_mac_suffix)"
# Always append the machine's MAC (no separators) to the base name so every
# node provisioned from the same answerfile gets a unique hostname, e.g.
# "arch-aabbccddeeff". Falls back to "arch" when the answerfile omits a name.
# The dash is only added when a MAC was actually found, so a NIC-less machine
# never ends up with a trailing "-".
BASE_HOSTNAME="${RAW_HOSTNAME:-arch}"
MAC_SUFFIX=$(get_mac_suffix)
if [[ -n "$MAC_SUFFIX" ]]; then
HOSTNAME="${BASE_HOSTNAME}-${MAC_SUFFIX}"
else
HOSTNAME="arch"
HOSTNAME="$BASE_HOSTNAME"
fi
USERNAME=$(af_get '.username' '')
ENCRYPT_DISK=$(af_bool '.encrypt')