Public bug reported:
On bionic, setting the network interface up (e.g. eno1) with DHCP now
causes a /run/netplan/eno1.yaml and a /run/net-eno1.conf file to be
written. The former gets imported by netplan after boot and causes the
DHCP lease from the initrd to be around forever, which I think goes
against the intent of DROPBEAR_IFDOWN=*.
I have brewed up a workaround script that lives in /etc/initramfs-
tools/scripts/init-bottom/hack-delete-netif-netplan.sh for now:
#### ---- 8< cut >8 --------
#!/bin/sh
PREREQ=""
prereqs() {
echo "$PREREQ"
}
case "$1" in
prereqs)
prereqs
exit 0
;;
esac
. /scripts/functions
log_begin_msg "Deleting all network configuration that systemd could try to
import"
rm /run/net-*.conf
rm /run/netplan/*.yaml
log_end_msg
#### ---- 8< cut >8 --------
I think that dropbear-intiramfs's init-bottom script should do this in
addition to downing the interfaces that it finds via the DROPBEAR_IFDOWN
pattern. Do you agree?
** Affects: dropbear (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1813394
Title:
DROPBEAR_IFDOWN=* takes interface down but leaves netplan config
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