Containerized neutron's DHCP server doesn't write any logs in Red Hat Openstack Platform 13

Issue

Containerized neutron's DHCP server doesn't write any logs in Red Hat Openstack Platform 13

Neutron uses dnsmasq to implement DHCP/DNS servers for tenant networks. Previously we were able to troubleshoot dnsmasq issues by analysing /var/log/messages on controller nodes that are hosting active DHCP/DNS servers. A lot of information was available there: it was possible to debug every DHCP transaction there.

In RHOSP 13 dnsmasq was containerized and now it doesn't log to /var/log files or systemd units any more. Its logs are also not available inside proper container and systemd journal.

As a result, it now impossible to troubleshoot dnsmasq issues and glitches. I would like to use this bug to ask to fix described behaviour and configure proper logging for dnsmasq instances.