Puppet 8.10.0 agent seems to cache/only load on start the local DNS resolver #9568
Description
Describe the Bug
I am currently migrating to a new recursive DNS setup. Monitoring hosts that still hit the old IPs, I noticed that all hosts running puppet still seem to be querying the old NS for the puppet master's IP exclusively. All other recursive traffic is on the new IP.
Hosts include hosts with and without systemd-resolved, as well as linux and openbsd hosts, which makes me believe that this is puppet specific behavior.
Expected Behavior
As soon as the system's DNS server is changed (/etc/resolv.conf, systemd-resolved,...), puppet should use the new NS.
Steps to Reproduce
Steps to reproduce the behavior:
- Provision a new host (expl. Debian 13)
- Onboard the host to puppet
- Change the recursive DNS server (resolv.conf, ... )
- Still observe queries to the old NS' IP
- Restart the puppet agent process
- Observe that the queries disappear
Environment
- Version 8.10.0
- Platform Debian 13, OpenBSD 7.8
Additional Context
More of an annoyance; Also didn't check what happens if the new IP becomes unavailable, i.e., if that leads to a flush.