Grafana cannot connect to Prometheus data source

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Connection ManagementUpdated Oct 30, 2024(via Exa)

Sources

Monitoring Celery: My Walk with Flower, Prometheus and Grafanarunsewe-seun.medium.com

Technologies:

Celerysubject

GrafanaSymptoms of this issue are visible in Grafana metrics and logs

PrometheusThe root cause of this issue originates in Prometheus

How to detect:

Grafana fails to connect to Prometheus at http://localhost:9090, preventing metrics visualization due to incorrect data source configuration, network issues, or Prometheus not running

Recommended action:

Verify Prometheus is running at http://localhost:9090. In Grafana, navigate to Configuration > Data Sources > Add Prometheus and set URL to http://localhost:9090. Check network connectivity between containers if using Docker. Verify no firewalls are blocking communication. Restart both Prometheus and Grafana Docker containers if issues persist.