This patch in preseed source code addresses the situation. This is the patch we pushed in Ubuntu[1] releases.
Thanks to cyphermox for the joint works (co-authorship). [1] - https://bugs.launchpad.net/ubuntu/+source/preseed/+bug/1452202 Eric
>From 742808a23407772c516628daecab29b4cbd12b22 Mon Sep 17 00:00:00 2001 From: Eric Desrochers <eric.desroch...@canonical.com> Date: Thu, 6 Oct 2016 00:01:59 -0400 Subject: [PATCH] Fix for netcfg/hostname,if set, to take precedence Modify debian/network-preseed.postinst --- debian/network-preseed.postinst | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/debian/network-preseed.postinst b/debian/network-preseed.postinst index bf651f4..6102182 100755 --- a/debian/network-preseed.postinst +++ b/debian/network-preseed.postinst @@ -14,4 +14,19 @@ if [ -n "$dhcp_url" ]; then preseed_location "$dhcp_url" fi preseed preseed/url + +CURRENT_HOSTNAME=`/bin/hostname` +if db_get netcfg/hostname && [ "$RET" ]; then + if ! echo "$RET" | grep -q 'debian'; then + # default hostname is debian; if that's what we have in the + # netcfg/hostname template, then netcfg will already have + # done the right thing. + NETCFG_HOSTNAME="$RET" + /bin/sed -i "s/$CURRENT_HOSTNAME/$NETCFG_HOSTNAME/" /etc/hostname + /bin/sed -i "s/$CURRENT_HOSTNAME/$NETCFG_HOSTNAME/" /etc/hosts + /bin/hostname "$NETCFG_HOSTNAME" + /usr/bin/logger -t netcfg "d-i netcfg/hostname $NETCFG_HOSTNAME took precedence" + fi +fi + preseed_command preseed/early_command -- 2.7.4
