ThanosBucketReplicateErrorRate

ThanosBucketReplicateErrorRate #

Thanos Replicate is failing to run, {{$value | humanize}}% of attempts failed.

Alert Rule
alert: ThanosBucketReplicateErrorRate
annotations:
  description: |-
    Thanos Replicate is failing to run, {{$value | humanize}}% of attempts failed.
      VALUE = {{ $value }}
      LABELS = {{ $labels }}    
  runbook: https://srerun.github.io/prometheus-alerts/runbooks/thanos-bucket-replicate/thanosbucketreplicateerrorrate/
  summary: Thanos Bucket Replicate Error Rate (instance {{ $labels.instance }})
expr: (sum by (job) (rate(thanos_replicate_replication_runs_total{result="error",
  job=~".*thanos-bucket-replicate.*"}[5m]))/ on (job) group_left  sum by (job) (rate(thanos_replicate_replication_runs_total{job=~".*thanos-bucket-replicate.*"}[5m])))
  * 100 >= 10
for: 5m
labels:
  severity: critical

Meaning #

The ThanosBucketReplicateErrorRate alert is triggered when the error rate of Thanos bucket replication runs exceeds 10% over a 5-minute period. This indicates that Thanos Replicate is experiencing issues while trying to replicate data from one storage bucket to another.

Impact #

A high error rate in Thanos bucket replication can lead to:

  • Data inconsistencies between buckets
  • Increased storage costs due to duplicated or redundant data
  • Delayed or failed data backups
  • Potential data loss in case of bucket failures or corruption

Diagnosis #

To diagnose the issue, follow these steps:

  1. Check the Thanos Replicate logs for errors related to bucket replication.
  2. Verify the bucket credentials and permissions to ensure they are correct and up-to-date.
  3. Check the network connectivity and firewall rules to ensure they are not blocking the replication process.
  4. Investigate any recent changes to the Thanos Replicate configuration or bucket settings.
  5. Check the disk space and storage capacity of the affected buckets to ensure they are not full or near capacity.

Mitigation #

To mitigate the issue, take the following steps:

  1. Check the Thanos Replicate configuration and adjust the retry policy or backoff strategy to handle temporary errors.
  2. Verify that the bucket credentials and permissions are correct and update them if necessary.
  3. Ensure network connectivity and firewall rules are correctly configured to allow replication traffic.
  4. Consider increasing the disk space or storage capacity of the affected buckets to prevent replication failures.
  5. Implement monitoring and alerting for Thanos Replicate to catch issues early and prevent data inconsistencies.

Additional resources:

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