Comment 19 for bug 1918410

I've tested isc-dhcp 4.4.1-2.3ubuntu1.1 from impish-proposed. Works as expected.

root@ii-dhcp:~# apt list isc-dhcp-client
Listing... Done
isc-dhcp-client/impish-proposed,now 4.4.1-2.3ubuntu1.1 amd64 [installed]

I can see no 'dhclient' entries in dmesg after the initial "apparmor_parser -r /etc/apparmor.d/sbin.dhclient" reload (neither after 'netplan apply', nor after reboot):

$ dmesg | grep dhclient
[...]
[328094.549824] audit: type=1400 audit(1655988888.955:4760): apparmor="STATUS" operation="profile_load" label="lxd-ii-dhcp_</var/snap/lxd/common/lxd>//&:lxd-ii-dhcp_<var-snap-lxd-common-lxd>:unconfined" name="/{,usr/}sbin/dhclient" pid=1609944 comm="apparmor_parser"

dynamic IP address is assigned via NetworkManager:
$ ip addr show eth0
[...]
182: eth0@if183: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
    link/ether 00:16:3e:e1:06:8a brd ff:ff:ff:ff:ff:ff link-netnsid 0
    inet 10.238.94.149/24 brd 10.238.94.255 scope global dynamic noprefixroute eth0
       valid_lft 3589sec preferred_lft 3589sec

$ nmcli -o
eth0: connected to netplan-eth0
        "eth0"
        ethernet (veth), 00:16:3E:E1:06:8A, sw, mtu 1500
        ip4 default, ip6 default
        inet4 10.238.94.149/24
[...]