Thanos is an open-source project that provides highly available Prometheus setup with long-term storage capabilities. It is designed to scale out Prometheus by enabling global querying, data retention, and downsampling. Thanos is widely used in cloud-native environments to ensure that metrics are stored efficiently and can be queried across multiple clusters.
When using Thanos, you might encounter an error message such as query: failed to execute range query. This error typically appears when attempting to execute a range query through the Thanos Querier component. The symptom is usually observed in the logs or the user interface where the query results are expected.
The error query: failed to execute range query indicates that the Thanos Querier has encountered a problem while processing a range query. This is often due to syntax errors in the query itself. Range queries in Prometheus and Thanos are used to retrieve time series data over a specified time range, and any mistake in the query syntax can lead to this error.
To resolve the query: failed to execute range query error, follow these steps:
Begin by reviewing the query syntax. Ensure that all functions, operators, and metric names are correctly used. Refer to the Prometheus Querying Basics for guidance on correct syntax.
Test your query in the Prometheus expression browser to identify syntax errors. This tool provides immediate feedback and can help pinpoint the exact location of the error.
Examine the Thanos Querier logs for additional context about the error. Logs can provide insights into what went wrong during query execution. Use the following command to view logs:
kubectl logs -l app=thanos-querier -n your-namespace
Ensure that the metric names and labels used in the query exist in your Prometheus data. You can list available metrics using the Prometheus UI or API.
By following these steps, you should be able to resolve the query: failed to execute range query error in Thanos. Properly verifying and testing your queries will help prevent such issues in the future. For more information, visit the Thanos Querier Documentation.
(Perfect for DevOps & SREs)
(Perfect for DevOps & SREs)
