nodejs/undici

Balanced Pool DNS lookup

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#1066 opened on Oct 18, 2021

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enhancementgood first issue

Description

It would be useful if balanced pool would do a dns lookup on non ip upstreams to loadbalance between all ips in the dns record.

Contributor guide

Tech stack
javascriptnodejs
Domain
backendapi
Issue type
feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
half day
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
stale
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
mostly clear
Prerequisites
Node.js DNS APIUndici Pool internals
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
60
Research direction
Investigate the current BalancedPool implementation in undici, likely in lib/pool/balanced pool.js. Understand how upstream URLs are stored and how requests are dispatched. Consider using Node.js 'dns' module to resolve non IP hostnames and update the pool's upstream list dynamically. Review any existing tests for BalancedPool to ensure new behavior is tested.