pdns-rec: new 5.4 tls_configurations option makes it impossible to use any Lua config

[hlindqvist]

• This is not a support question, I have read about opensource and will send support questions to the IRC channel, GitHub Discussions or the mailing list.
• I have read and understood the 'out in the open' support policy
• I have read and understood the PowerDNS AI policy

• Program: Recursor
• Issue type: Bug report

Short description

New yaml-only config options are marked as Lua config, making pdns-rec impossible to start if any other Lua config is in use.

Environment

• Operating system: Debian 13
• Software version: 5.4.0-alpha1
• Software source: PowerDNS repository

Steps to reproduce

1. configure recursor.lua_config_file in recursor.yml (using for instance rpzPrimary is very useful for an environment without dynamically generated config files, ie a simple loop instead of a lot of repetitive config)

2. configure outgoing.tls_configurations in recursor.yml

Expected behaviour

Pdns-rec should run as there is no conflicting config (tls_configurations does not actually have any Lua counterpart)

Actual behaviour

Pdns-rec refuses to start. Error message:

YAML settings include values originally in Lua but also sets `recursor.lua_config_file`. This is unsupported

Other information

New yaml-only configuration options are flagged as Lua options, effectively making any use of Lua config impossible as pdns-rec cannot start if there is conflicting use of yaml/Lua config:

  alldefault = alldefault && settings.outgoing.tls_configurations.empty(); // actually not a Lua item, but very much alike
  alldefault = alldefault && settings.logging.opentelemetry_trace_conditions.empty(); // actually not a Lua item, but very much alike

https://github.com/PowerDNS/pdns/blob/rec-5.4.0-alpha1/pdns/recursordist/rec-rust-lib/cxxsupport.cc#L1432-L1433
https://github.com/PowerDNS/pdns/blob/rec-5.4.0-alpha1/pdns/recursordist/rec-rust-lib/cxxsupport.cc#L1457-L1458