certel
certel
Certificate Expiry & Logs.
Self-hosted SSL/TLS certificate monitor: a single binary and a single YAML file. certel probes your endpoints on a schedule and delivers templated webhook alerts when a certificate is expiring, expired, invalid, or TLS becomes unavailable. Optionally it exposes Prometheus metrics whose certificate metric names match ssl_exporter .
The concept, what certel owns itself, and why we built it.
From zero to a working certificate check in one command.
Everything exported on /metrics, and the rules new metrics follow.
The survey of existing SSL monitoring tools, licenses included.
Architecture Decision Records — the why behind the design.
Repository, issues, and releases on GitHub.