ThanosRuleConfigReloadFailure

ThanosRuleConfigReloadFailure #

Thanos Rule {{$labels.job}} has not been able to reload its configuration.

Alert Rule
alert: ThanosRuleConfigReloadFailure
annotations:
  description: |-
    Thanos Rule {{$labels.job}} has not been able to reload its configuration.
      VALUE = {{ $value }}
      LABELS = {{ $labels }}    
  runbook: https://srerun.github.io/prometheus-alerts/runbooks/thanos-ruler/thanosruleconfigreloadfailure/
  summary: Thanos Rule Config Reload Failure (instance {{ $labels.instance }})
expr: avg by (job, instance) (thanos_rule_config_last_reload_successful{job=~".*thanos-rule.*"})
  != 1
for: 5m
labels:
  severity: info

Meaning #

The ThanosRuleConfigReloadFailure alert is triggered when Thanos Rule cannot reload its configuration. This alert indicates that there is an issue with the configuration reload process, which may prevent Thanos Rule from functioning correctly.

Impact #

If this alert is not addressed, Thanos Rule may not be able to function correctly, leading to:

  • Inaccurate or incomplete metric data
  • Failure to detect anomalies or alert on critical events
  • Increased risk of errors or mistakes in the monitoring and alerting system

Diagnosis #

To diagnose the issue, follow these steps:

  1. Check the Thanos Rule logs for errors related to configuration reload.
  2. Verify that the configuration file is correctly formatted and valid.
  3. Check the Thanos Rule service status and ensure it is running correctly.
  4. Verify that the configuration reload is not being blocked by any network or firewall issues.
  5. Check the Prometheus metric thanos_rule_config_last_reload_successful to see if it is consistently reporting 0 or other non-successful values.

Mitigation #

To mitigate the issue, follow these steps:

  1. Check the Thanos Rule configuration file for errors and correct any syntax issues.
  2. Restart the Thanos Rule service to attempt to reload the configuration.
  3. Verify that the configuration reload is successful by checking the thanos_rule_config_last_reload_successful metric.
  4. If the issue persists, check the Thanos Rule logs for any additional error messages and investigate further.
  5. If none of the above steps resolve the issue, consider seeking assistance from a Thanos Rule expert or the Prometheus community.
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