13. Monitoring Docker Metrics

Activity 13.01: Creating a Grafana Dashboard to Monitor System Memory

Solution:

There are a number of ways in which you can perform this activity. The following steps are one such method:

1. Make sure that Prometheus is running and collecting data, Docker and cAdvisor are configured to expose metrics, and Grafana is running and configured with Prometheus as a data source.
2. Open the Grafana web interface and the Container Monitoring dashboard you created in Exercise 13.05: Installing and Running Grafana on Your System
3. There is an Add panel option at the top of the dashboard and to the right of the dashboard name. Click the Add panel icon to add in your new dashboard panel:

   Figure 13.26: Adding a new panel to the container monitoring dashboard

4. Select Prometheus from the drop-down list as the data source we will be using to produce the new dashboard panel.
5. In the metrics section, add the following PromQL query, container_memory_usage_bytes...