systemd incompatible with openresolv and dnsmasq

[Bob Vincent]

Problem: systemd breaks resolvconf-dependent DNS

Test case: Install dnsmasq with systemd.

Result:
  The script in /etc/dhcp/dhclient-enter-hooks.d/resolvconf defines the make_resolv_conf() function to pass DHCP information to the /sbin/resolvconf program.
  The script in /etc/dhcp/dhclient-enter-hooks.d/resolved redefines the make_resolv_conf() function to write DHCP information to /run/systemd/resolved.conf.d/isc-dhcp-v4-$interface.conf
  As a result, resolvconf never runs, and dnsmasq never receives the DHCP-supplied nameservers.
  Therefore, DNS resolution is broken.

Expected result:
  DHCP-supplied nameservers should be passed to both resolvconf and to systemd.

Workaround:
  Use the 127.0.0.53 address for the systemd resolver as the dnsmasq upstream server.

lsb_release -rd output:

Description: Ubuntu 18.04.1 LTS
Release: 18.04

[Dan Streetman (ddstreet)]

please reopen if this is still an issue