FreeRADIUSDown #

The FreeRADIUS server is not reachable. Please check the server immediately.

Alert Rule

alert: FreeRADIUSDown
annotations:
  description: The FreeRADIUS server is not reachable. Please check the server immediately.
  runbook: https://srerun.github.io/prometheus-alerts/runbooks/freeradius-exporter/freeradiusdown/
  summary: FreeRADIUS is down
expr: freeradius_up == 0
for: 1m
labels:
  severity: critical

Here is a runbook for the FreeRADIUSDown alert:

Meaning #

The FreeRADIUSDown alert indicates that the FreeRADIUS server is not reachable and has been down for at least 1 minute. This alert is critical because it affects the ability to authenticate and authorize users, which can impact the availability of critical services.

Impact #

The impact of this alert is high, as it can cause:

Disruption to user authentication and authorization
Inability to access critical services and applications
Potential security risks due to unauthorized access
Increased support tickets and user frustration

Diagnosis #

To diagnose the issue, follow these steps:

Check the FreeRADIUS server logs for errors or anomalies
Verify that the server is running and that there are no network connectivity issues
Check the system resources (CPU, memory, disk space) to ensure they are within normal limits
Verify that the FreeRADIUS exporter is properly configured and running

Mitigation #

To mitigate the issue, follow these steps:

Restart the FreeRADIUS server and verify that it is running properly
Check and resolve any network connectivity issues
Check and resolve any system resource issues (e.g., clear disk space, restart services)
Verify that the FreeRADIUS exporter is properly configured and running
Perform a rolling restart of the FreeRADIUS server to ensure that it is running with the correct configuration
Monitor the server for any further issues and take corrective action as needed

Note: It is essential to resolve this issue as quickly as possible to minimize the impact on users and services.