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Grafana Dashboard No Data — Data Source Connection and Query Errors

Warningsystem

Overview

Fix Grafana dashboards showing 'No data' when panels cannot retrieve metrics from data sources like Prometheus, InfluxDB, or Elasticsearch.

Key Details

  • Grafana visualizes data from configured data sources using dashboard panels with queries
  • No data can mean: data source unreachable, query returns empty results, or time range has no data
  • Each panel has its own query that can be inspected and debugged independently
  • Common data sources: Prometheus, InfluxDB, Elasticsearch, MySQL, PostgreSQL, CloudWatch
  • The time range selector affects all panels — data may exist outside the selected range

Common Causes

  • Data source connection failed — Grafana cannot reach Prometheus, InfluxDB, or other backend
  • PromQL, InfluxQL, or other query syntax error returning empty results
  • Time range selector set to a period where no data exists
  • Metric name changed or label values differ from what the dashboard query expects

Steps

  1. 1Test data source connection: Configuration > Data Sources > select source > click 'Test' button
  2. 2Inspect panel query: click panel title > Edit > check the query and preview results
  3. 3Expand time range: set to 'Last 24 hours' or 'Last 7 days' to see if data exists in a broader window
  4. 4Check metric names: open Prometheus/InfluxDB directly and verify the metric exists with expected labels
  5. 5Use the Query Inspector: panel Edit > Query Inspector to see the raw query and response

Tags

grafanadashboardno-datadata-sourcevisualization

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linux-prometheus-scrape-target-down

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Frequently Asked Questions

In Grafana's Explore mode, select the data source and use the metric browser to search for available metrics. For Prometheus, browse to /api/v1/label/__name__/values for a complete list of metric names.