X509-certificate-exporter – Prometheus exporter for TLS cert expiration
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.…
X509-certificate-exporter – Prometheus exporter for TLS cert expiration launched on May 12, 2026 with 8 votes, #1,430 of 20,538 launches that month and more than 75% of that year's launches.
What it does
A Prometheus exporter for X.509 certificates, built for Kubernetes first but equally happy as a standalone binary - enix/x509-certificate-exporter
In the maker’s words, at launch
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…
Does a similar job
all alternatives →
Kubernetes Certificate Manager – Native Let's Encrypt Integration2016 · github.com · ▲186Manage Lets Encrypt certificates for a Kubernetes cluster. - kelseyhightower/kube-cert-manager
Never have an SSL certificate expire again2022 · haveibeenexpired.com · ▲40Automated SSL certificate monitoring with expiration alerts, Certificate Transparency discovery, and Slack/Discord/Teams notifications. Prevent downtime with continuous monitoring.
A Let's Encrypt Certificates Manager for Kubernetes2019 · github.com · ▲14A Let's Encrypt certificates manager for Kubernetes - math-nao/certs
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