Linkerd is a service mesh designed to provide observability, security, and reliability to cloud-native applications. It acts as a transparent layer that sits between your application and the network, managing communication between services. One of its key features is the ability to collect and expose metrics, which are crucial for monitoring and performance analysis.
One common issue users encounter is missing metrics in Linkerd's Prometheus dashboard. This can manifest as empty graphs or missing data points, making it difficult to monitor the health and performance of your services.
When accessing the Prometheus dashboard, you may notice that metrics related to Linkerd components are not being displayed. This can hinder your ability to diagnose issues and understand service behavior.
The root cause of missing metrics is often related to Prometheus not scraping data from Linkerd components. This can happen due to misconfigurations in Prometheus or issues with the Linkerd components not exposing metrics correctly.
To resolve the issue of missing metrics, follow these steps:
Ensure that Prometheus is configured to scrape metrics from all Linkerd components. Check the prometheus.yml file for correct scrape targets. The targets should include all Linkerd components such as the control plane and data plane proxies.
scrape_configs: - job_name: 'linkerd' static_configs: - targets: ['linkerd-controller:9090', 'linkerd-proxy:4191']
Use the Linkerd CLI to verify that all components are running and healthy. Run the following command:
linkerd check
This command will provide a detailed report on the status of Linkerd components. Ensure that all components are up and running.
Ensure that Linkerd components are exposing metrics. You can do this by accessing the metrics endpoint of each component directly. For example, to check the metrics for the Linkerd proxy, use:
curl http://linkerd-proxy:4191/metrics
If metrics are not being exposed, check the component logs for errors.
Ensure that there are no network issues preventing Prometheus from accessing Linkerd endpoints. Check firewall rules and network policies that might block access.
For more information on configuring Prometheus with Linkerd, refer to the Linkerd documentation. If you continue to experience issues, consider reaching out to the Linkerd community for support.
Let Dr. Droid create custom investigation plans for your infrastructure.
Book Demo
