[PR #4837] Add Darwin multi-server support for local DNS settings #26409

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saavagebueno · 2026-08-05T07:07:18-04:00

saavagebueno commented

2026-08-05 07:07:18 -04:00

📋 Pull Request Information

Original PR: https://github.com/netbirdio/netbird/pull/4837
Author: @hurricanehrndz
Created: 11/21/2025
Status: 🔄 Open

Base: main ← Head: fix/darwin-dns-multi-server-support

📝 Commits (2)

8f59216 Add Darwin multi-server support for local DNS settings
92c85dd Refactor Darwin DNS parser into testable helper

📊 Changes

3 files changed (+196 additions, -34 deletions)

View changed files

📝 client/internal/dns/host.go (+1 -1)
📝 client/internal/dns/host_darwin.go (+51 -33)
📝 client/internal/dns/host_darwin_test.go (+144 -0)

📄 Description

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

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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Documentation

Select exactly one:

I added/updated documentation for this change
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.

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

_{🔄 This issue represents a GitHub Pull Request. It cannot be merged through Gitea due to API limitations.}

## 📋 Pull Request Information **Original PR:** https://github.com/netbirdio/netbird/pull/4837 **Author:** [@hurricanehrndz](https://github.com/hurricanehrndz) **Created:** 11/21/2025 **Status:** 🔄 Open **Base:** `main` ← **Head:** `fix/darwin-dns-multi-server-support` --- ### 📝 Commits (2) - [`8f59216`](https://github.com/netbirdio/netbird/commit/8f592165bce38041a30141e7be381b211b233391) Add Darwin multi-server support for local DNS settings - [`92c85dd`](https://github.com/netbirdio/netbird/commit/92c85dd2125ccf82c33b53def60e5b5a7ae87302) Refactor Darwin DNS parser into testable helper ### 📊 Changes **3 files changed** (+196 additions, -34 deletions) <details> <summary>View changed files</summary> 📝 `client/internal/dns/host.go` (+1 -1) 📝 `client/internal/dns/host_darwin.go` (+51 -33) 📝 `client/internal/dns/host_darwin_test.go` (+144 -0) </details> ### 📄 Description ## 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>  --- <sub>🔄 This issue represents a GitHub Pull Request. It cannot be merged through Gitea due to API limitations.</sub>

saavagebueno added the pull-request label 2026-08-05 07:07:18 -04:00

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Reference: DYNR/netbird#26409