[PR #4693] [CLOSED] Apply DNS server update only on changes #23903

New Issue

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

saavagebueno commented

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

📋 Pull Request Information

Original PR: https://github.com/netbirdio/netbird/pull/4693
Author: @hurricanehrndz
Created: 10/23/2025
Status: ❌ Closed

Base: main ← Head: feat_dsn_server_update_on_change

📝 Commits (3)

9272227 Apply DNS server update only on changes
ccce298 fix: reduce complexity
2bb74d4 Add tests for DNSConfig comparison

📊 Changes

2 files changed (+550 additions, -2 deletions)

View changed files

📝 client/internal/engine.go (+91 -2)
📝 client/internal/engine_test.go (+459 -0)

📄 Description

Add configuration tracking and comparison logic to avoid updating the DNS server when the configuration hasn't changed. This prevents potential DNS resolution disruptions and unnecessary processing cycles.

Changes:

Add lastDNSConfig field to Engine struct to track applied configuration
Implement dnsConfigsEqual() for deep comparison of DNS configurations
Only call UpdateDNSServer when configuration actually changes

Describe your changes

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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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_{🔄 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/4693 **Author:** [@hurricanehrndz](https://github.com/hurricanehrndz) **Created:** 10/23/2025 **Status:** ❌ Closed **Base:** `main` ← **Head:** `feat_dsn_server_update_on_change` --- ### 📝 Commits (3) - [`9272227`](https://github.com/netbirdio/netbird/commit/92722270cce5820db5b900dbcc727918c66d5f09) Apply DNS server update only on changes - [`ccce298`](https://github.com/netbirdio/netbird/commit/ccce298c4c112a0b3dd88a4af8a2979c9ec127c0) fix: reduce complexity - [`2bb74d4`](https://github.com/netbirdio/netbird/commit/2bb74d4a7677235cac6306d0dddebf22d23cf1b8) Add tests for DNSConfig comparison ### 📊 Changes **2 files changed** (+550 additions, -2 deletions) <details> <summary>View changed files</summary> 📝 `client/internal/engine.go` (+91 -2) 📝 `client/internal/engine_test.go` (+459 -0) </details> ### 📄 Description Add configuration tracking and comparison logic to avoid updating the DNS server when the configuration hasn't changed. This prevents potential DNS resolution disruptions and unnecessary processing cycles. Changes: - Add lastDNSConfig field to Engine struct to track applied configuration - Implement dnsConfigsEqual() for deep comparison of DNS configurations - Only call UpdateDNSServer when configuration actually changes ## Describe your changes ## Issue ticket number and link ## Stack  ### Checklist - [x] Is it a bug fix - [ ] Is a typo/documentation fix - [x] 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/__ --- <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 06:08:00 -04:00

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Reference: DYNR/netbird#23903