dnsmasq: Module Addresses DNS Resolver Conflict

[Tearran]

A module to manage the dnsmasq service. The focus was on resolving conflicts between systemd-resolved and dnsmasq, and it may need refining.

This module manages the dnsmasq service, including installation, configuration, removal, purging, and status checking. It ensures that dnsmasq is properly configured and that systemd-resolved is disabled to avoid conflicts. The focus was on resolving conflicts between systemd-resolved and dnsmasq, and it may need refining for more advanced use cases.

Issue reference:
KVM:

Implementation Details

• Key changes introduced by this PR:

  • Disables systemd-resolved service to avoid conflicts with dnsmasq.
  • Sets up dnsmasq configuration to use 127.0.0.1 as the DNS resolver.
  • Provides functions to install, configure, remove, purge, and check the status of dnsmasq.
  • Ensures dnsmasq starts on boot and handles DNS resolution properly.

• Justification for the changes:

  • Resolves conflicts between systemd-resolved and dnsmasq.
  • Provides advanced DNS resolution features using dnsmasq.

• Confirmation that no new external dependencies or modules have been introduced:

  • No new external dependencies or modules have been introduced in this PR.

Documentation Summary

• Metadata Included:

  • Yes, the metadata (associative arrays) are included in the code. Metadata for modules, jobs, and runtime have been updated appropriately.

• Document Generated:

  • Yes, the updated documentation has been generated using armbian-configng --doc. The README.md has been updated to reflect the changes.

Testing Procedure

• Test 1:

  • Description: Tested the installation and configuration of dnsmasq by logging in via SSH (ssh@hostname) and accessing Webmin (https://hostname:10000).
  • Results: Dnsmasq was installed and configured successfully, and systemd-resolved was disabled without any issues. DNS resolution worked as expected.

• Test 2:

  • Description: Tested the removal and purging of dnsmasq.
  • Results: Dnsmasq was removed and purged successfully, and the system reverted to its original DNS configuration without conflicts.

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my code
• I have ensured that my changes do not introduce new warnings or errors
• No new external dependencies are included
• Changes have been tested and verified
• I have included necessary metadata in the code, including associative arrays