The same problem occurs when the hdd is automatically decrypted with
clevis and a tang server. The script /usr/share/initramfs-
tools/scripts/local-bottom/clevis tries to deactivate the network
interface again after it got the secret to decrypt the disk from the
tang server:
...
for iface in /sys/class/net/*; do
if [ -e "$iface" ]; then
iface=$(basename "$iface")
ip link set dev "$iface" down
ip addr flush dev "$iface"
ip route flush dev "$iface"
fi
done
The presence of /run/net-*.conf and /run/netplan/*.yaml leads to the
interface beeing managed by systemd-networkd instad of NetworkManager
here, too.
Instead of implementing removal of the files in dropbear an clevis,
maybe there is a single place to serve both, dropbear and clevis?
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https://bugs.launchpad.net/bugs/1813394
Title:
DROPBEAR_IFDOWN=* takes interface down but leaves netplan config
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