[PR #4837] Add Darwin multi-server support for local DNS settings #24283

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saavagebueno · 2026-08-05T06:08:30-04:00

saavagebueno commented

2026-08-05 06:08:30 -04:00

Original Pull Request: https://github.com/netbirdio/netbird/pull/4837

State: open
Merged: No

Describe your changes

This commit enhances Darwin (macOS) DNS configuration to support multiple DNS servers instead of just a single server:
Key Changes:

API Change: Renamed ServerIP to ServerIPs (slice) in SystemDNSSettings struct
Multi-server collection: Modified DNS settings parser to collect all DNS server addresses (IPv4 and IPv6) instead of stopping at the first IPv4
Multi-server configuration: Updated addDNSState() to accept and configure multiple DNS servers as space-separated string
Deduplication: Added domain deduplication logic to prevent duplicate entries in search domains
Validation: Improved IP validation using ip.IsValid() for all collected addresses

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Is it a bug fix
Is a typo/documentation fix
Is a feature enhancement
It is a refactor
Created tests that fail without the change (if possible)

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Summary by CodeRabbit

New Features
- DNS settings now support multiple DNS server addresses for improved resilience.
Refactor
- Configuration flows updated to handle multiple servers, validate/ignore invalid addresses, deduplicate domains, and surface parsing/logging for system DNS state; defaults (e.g., port) preserved.
Tests
- Added unit tests covering parsing, multiple servers (including IPv6), deduplication, empty outputs, invalid IPs, and other edge cases.

_{✏️ Tip: You can customize this high-level summary in your review settings.}

**Original Pull Request:** https://github.com/netbirdio/netbird/pull/4837 **State:** open **Merged:** No --- ## Describe your changes This commit enhances Darwin (macOS) DNS configuration to support multiple DNS servers instead of just a single server: Key Changes: - API Change: Renamed ServerIP to ServerIPs (slice) in SystemDNSSettings struct - Multi-server collection: Modified DNS settings parser to collect all DNS server addresses (IPv4 and IPv6) instead of stopping at the first IPv4 - Multi-server configuration: Updated addDNSState() to accept and configure multiple DNS servers as space-separated string - Deduplication: Added domain deduplication logic to prevent duplicate entries in search domains - Validation: Improved IP validation using ip.IsValid() for all collected addresses - ## Issue ticket number and link ## Stack  ### Checklist - [x] Is it a bug fix - [ ] Is a typo/documentation fix - [ ] Is a feature enhancement - [ ] It is a refactor - [ ] Created tests that fail without the change (if possible) > By submitting this pull request, you confirm that you have read and agree to the terms of the [Contributor License Agreement](https://github.com/netbirdio/netbird/blob/main/CONTRIBUTOR_LICENSE_AGREEMENT.md). ## Documentation Select exactly one: - [ ] I added/updated documentation for this change - [x] Documentation is **not needed** for this change (explain why) ### Docs PR URL (required if "docs added" is checked) Paste the PR link from https://github.com/netbirdio/docs here: https://github.com/netbirdio/docs/pull/__  ## Summary by CodeRabbit * **New Features** * DNS settings now support multiple DNS server addresses for improved resilience. * **Refactor** * Configuration flows updated to handle multiple servers, validate/ignore invalid addresses, deduplicate domains, and surface parsing/logging for system DNS state; defaults (e.g., port) preserved. * **Tests** * Added unit tests covering parsing, multiple servers (including IPv6), deduplication, empty outputs, invalid IPs, and other edge cases. <sub>✏️ Tip: You can customize this high-level summary in your review settings.</sub>

saavagebueno added the pull-request label 2026-08-05 06:08:30 -04:00

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Reference: DYNR/netbird#24283