Show HN: CoreDNS-GSLB – DNS-based load balancing with GeoIP and Lua healthchecks

1 dmachard 0 7/18/2025, 3:02:41 PM github.com ↗

Most GSLB solutions are proprietary or Kubernetes-centric. This plugin adds global load balancing directly to CoreDNS for any infrastructure.

Key features: - GeoIP routing (MaxMind + custom YAML mapping) - route users to nearest datacenter - Lua-scriptable health checks - call HTTP APIs, parse JSON, check Prometheus metrics, even SSH exec - Adaptive health checking - automatically reduces check frequency for idle records - EDNS Client Subnet support - get real client IPs through DNS forwarders - Live config reload - no CoreDNS restart needed - TXT record debugging - dig TXT yourapp.com shows all backend states instantly

GitHub: https://github.com/dmachard/coredns-gslb Looking for feedback on the GeoIP implementation and Lua scripting approach!

Mango Health (YC W24) Is Hiring (ycombinator.com)

Resolve (YC W15) Is Hiring an Operations and Billing Lead for Construction VR

Arva AI (YC S24) Is Hiring an AI Research Engineer (London, UK) (arva.ai)

Rejoy Health (YC W21) Is Hiring (ycombinator.com)

Weave (YC W25) is hiring an AI engineer (ycombinator.com)

CoinTracker (YC W18) is hiring to solve crypto taxes and accounting (remote)

Crimson (YC X25) is hiring founding engineers in London (ycombinator.com)

Martin (YC S23) Is Hiring Founding Engineers to Build a Better Siri (ycombinator.com)

Meticulous (YC S21) is hiring in UK to redefine software dev (tinyurl.com)

Infisical (YC W23) Is Hiring DevRel Engineers (ycombinator.com)

Sieve (YC X25) is hiring researchers to build large video datasets for AI labs (sievedata.com)

Activeloop (YC S18) Is Hiring AI Search and Python Back End Engineers(Onsite,MV) (careers.activeloop.ai)

Attimet (YC F24) – Quant Trading Research Lab – Is Hiring Founding Researcher (ycombinator.com)

Metriport (YC S22) is hiring engineers to improve healthcare data exchange (ycombinator.com)

Telli (YC F24) Is Hiring Engineers [On-Site Berlin] (hi.telli.com)

Continue (YC S23) is hiring software engineers in San Francisco (ycombinator.com)

UpCodes (YC S17) is hiring a Head of Ops to automate construction compliance (up.codes)

Enhanced Radar (YC W25) is hiring a founding engineer

Converge (YC S23) well-capitalized New York startup seeks product developers (runconverge.com)

Kyber (YC W23) Is Hiring Enterprise BDRs (ycombinator.com)

MindsDB (YC W20) is hiring an AI solutions engineer (job-boards.greenhouse.io)

Recurse Center (YC S10) Is Hiring a Career Facilitator (recurse.notion.site)

Cua (YC X25) is hiring an engineer (ycombinator.com)

Noloco (YC S21) is hiring a founder's associate in Barcelona (ycombinator.com)

14.ai (YC W24) hiring founding engineers in SF to build a Zendesk alternative (14.ai)

Lago (Open-Source Usage Based Billing) is hiring for ten roles (ycombinator.com)

Spark AI (YC W24) is hiring a full-stack engineer in SF (founding team) (ycombinator.com)

Bitmovin (YC S15) Is Hiring a Junior Solutions Engineer in Denver (bitmovin.com)

SigNoz (YC W21, Open Source Datadog) Is Hiring DevRel Engineers (Remote)(US) (ycombinator.com)

AccessOwl (YC S22) is hiring an Elixir Engineer to connect 100s of SaaS (ycombinator.com)

FurtherAI (YC W24) Is Hiring for Software and AI Roles (ycombinator.com)

Show HN: CoreDNS-GSLB – DNS-based load balancing with GeoIP and Lua healthchecks

Comments (0)