X509-certificate-exporter
Prometheus exporter for TLS cert expiration
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Certificates expire silently. Kubernetes won't warn you, and most teams find out when something breaks. This exporter watches PEM files, kubeconfigs, Kubernetes TLS secrets, and PKCS#12 bundles, and exposes expiration as Prometheus metrics you can alert on. It works standalone too, no Kubernetes required. A Grafana dashboard is included. The new release is a major rewrite, built from experience running this across a large number of production clusters. The main pain point it addresses: at scale, with thousands of certificates, the exporter was putting too much pressure on the Kubernetes API. We also put a lot of care into supply chain security this time around.
HN · launched May 12, 2026 · 8 upvotes (top 51%) · 0 views
Niche: certificate and license management software · 65 launches, 6 in the last 7 days ▼ -14% · Explore this niche →
Category and tags
- Horizontal
- Observability & eval
- Developer
- Not AI
- Hobby / open-source project
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More like this: all 65 launches in certificate and license management software →
Could you build this?
Yes It is a straightforward Prometheus exporter written in Go or Python that parses local X.509/PKCS#12 certificates or Kubernetes secret objects using standard crypto libraries and exposes expiration timestamps via an HTTP metric endpoint.
Discussion
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Competitors
Other products that read as similar to this one : 101 launches clear the similarity bar, closest 8 shown.
Attention rank: #45 of 102 (itself plus its competitors, highest first, normalized so YC and Product Hunt are compared fairly).
Launched 182 days after the earliest competitor.
- CertAvert · ph · 2026-09-29 · 1 upvotes · similarity 0.57
- CertNotify · ph · 2026-10-14 · 1 upvotes · similarity 0.55
- Govigie · ph · 2026-09-10 · 1 upvotes · similarity 0.53
- CertHalo · ph · 2026-10-22 · 2 upvotes · similarity 0.51
- WebChecker · ph · 2026-11-14 · 2 upvotes · similarity 0.47
- Xportify · ph · 2026-09-25 · 1 upvotes · similarity 0.46
- ExpiryOwl · ph · 2026-10-09 · 2 upvotes · similarity 0.45
- CertKit for automating SSL certs to Windows, JKS, and appliances · hn · 2026-04-08 · 7 upvotes · similarity 0.45
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