Guides
Guides to monitor without the noise.
Step-by-step instructions, commands to copy and the pitfalls to avoid, for each part of your monitoring.
How to avoid false positive alerts with multi-region checks
What causes false positive uptime alerts, how multi-region outage confirmation works, and the settings that keep your alerts trustworthy, with a checklist.
How to monitor SSL certificate and domain name expiry
SSL/TLS certificates and domain names: why they still expire, how to check them with openssl and RDAP, and which alert schedule to use.
SLA, SLO and SLI: understanding and calculating uptime
SLA, SLO and SLI explained: the uptime formula, allowed downtime from 99% to 99.99%, error budgets, composite uptime and how to write SLA clauses.
How to set up a status page on your own domain
Run a status page on status.yourdomain.com: what to show, the CNAME record, checking DNS with dig, automatic HTTPS, subscribers and incident updates.
How to monitor a cron job with heartbeats
Cron jobs fail silently. Learn to monitor them with heartbeats: curl pings, duration, exit codes, grace periods, time zones and a Laravel example.
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