The target is shown as DOWN and metrics are no longer updated.
Likely causes
- Unavailable /metrics endpoint
- DNS or network issue
- Authentication or TLS issue
- Timeout or oversized response
Checks in priority order
- Open Status > Targets
- Read Last Error
- Test the URL from the Prometheus server
- Check certificate, authentication, and timeout
When to escalate
Escalate when the failure affects multiple users, a production dependency is unavailable, or logs show a component outside your control. Include timestamps, scope, tests already performed, and the last known working state.