certificate-expiry-monitor
A Kubernetes-native utility that monitors TLS certificate expiry and exposes metrics to Prometheus.
What is certificate-expiry-monitor?
Certificate Expiry Monitor is a utility that continuously checks TLS certificates on Kubernetes pods and ingresses, exposing their expiry status as Prometheus metrics. It solves the problem of unexpected certificate expirations by providing real-time monitoring and alerting capabilities. The tool automatically discovers services in your cluster and tracks certificate validity to prevent downtime.
DevOps engineers and SREs managing Kubernetes clusters who need to monitor TLS certificate expiration across multiple services. It's particularly useful for teams using Prometheus for observability who want to integrate certificate health into their existing monitoring dashboards.
Developers choose this tool because it's purpose-built for Kubernetes environments with native integration, automatic service discovery, and lightweight operation. Unlike manual checking or generic monitoring solutions, it provides specialized certificate metrics with Kubernetes context (namespaces, pods, domains) ready for Prometheus alerting.
Overview
Utility that exposes the expiry of TLS certificates as Prometheus metrics
Use Cases
Best For
- Monitoring TLS certificate expiration across multiple Kubernetes services
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