Clock drift
System clock is at least 5 seconds off from upstream NTP. Critical at >=60s; TLS validation, log correlation, database replication, and cron all break.
Remediation
When this rule fires on one of your servers, the dashboard alert detail page renders the full remediation guidance: the command to run, what to verify after, and Furnace's annotation for your specific distro + hardware. Sign in at app.glassmkr.com to see the live alert.