Chapter 9. Monitoring project and application metrics using the Developer perspective
The Observe view in the Developer perspective provides options to monitor your project or application metrics, such as CPU, memory, and bandwidth usage, and network related information.
- You have logged in to the web console and have switched to the Developer perspective.
- You have created and deployed applications on OpenShift Container Platform.
9.2. Monitoring your project metrics
After you create applications in your project and deploy them, you can use the Developer perspective in the web console to see the metrics for your project.
On the left navigation panel of the Developer perspective, click Observe to see the Dashboard, Metrics, Alerts, and Events for your project.
Use the Dashboard tab to see graphs depicting the CPU, memory, and bandwidth consumption and network related information, such as the rate of transmitted and received packets and the rate of dropped packets.
Figure 9.1. Monitoring dashboard
Use the following options to see further details:
- Select a workload from the All Workloads list to see the filtered metrics for the selected workload.
- Select an option from the Time Range list to determine the time frame for the data being captured.
- Select an option from the Refresh Interval list to determine the time period after which the data is refreshed.
- Hover your cursor over the graphs to see specific details for your pod.
- Click on any of the graphs displayed to see the details for that particular metric in the Metrics page.
Use the Metrics tab to query for the required project metric.
Figure 9.2. Monitoring metrics
- In the Select Query list, select an option to filter the required details for your project. The filtered metrics for all the application pods in your project are displayed in the graph. The pods in your project are also listed below.
- From the list of pods, clear the colored square boxes to remove the metrics for specific pods to further filter your query result.
- Click Show PromQL to see the Prometheus query. You can further modify this query with the help of prompts to customize the query and filter the metrics you want to see for that namespace.
- Use the drop-down list to set a time range for the data being displayed. You can click Reset Zoom to reset it to the default time range.
- Optional: In the Select Query list, select Custom Query to create a custom Prometheus query and filter relevant metrics.
Use the Alerts tab to see the rules that trigger alerts for the applications in your project, identify the alerts firing in the project, and silence them if required.
Figure 9.3. Monitoring alerts
- Use the Filter list to filter the alerts by their Alert State and Severity.
- Click on an alert to go to the details page for that alert. In the Alerts Details page, you can click View Metrics to see the metrics for the alert.
- Use the Notifications toggle adjoining an alert rule to silence all the alerts for that rule, and then select the duration for which the alerts will be silenced from the Silence for list. You must have the permissions to edit alerts to see the Notifications toggle.
- Use the Options menu adjoining an alert rule to see the details of the alerting rule.
Use the Events tab to see the events for your project.
Figure 9.4. Monitoring events
You can filter the displayed events using the following options:
- In the Resources list, select a resource to see events for that resource.
- In the All Types list, select a type of event to see events relevant to that type.
- Search for specific events using the Filter events by names or messages field.
9.3. Monitoring your application metrics
After you create applications in your project and deploy them, you can use the Topology view in the Developer perspective to see the alerts and metrics for your application. Critical and warning alerts for your application are indicated on the workload node in the Topology view.
To see the alerts for your workload:
- In the Topology view, click the workload to see the workload details in the right panel.
Click the Observe tab to see the critical and warning alerts for the application; graphs for metrics, such as CPU, memory, and bandwidth usage; and all the events for the application.Note
Only critical and warning alerts in the Firing state are displayed in the Topology view. Alerts in the Silenced, Pending and Not Firing states are not displayed.
Figure 9.5. Monitoring application metrics
- Click the alert listed in the right panel to see the alert details in the Alert Details page.
- Click any of the charts to go to the Metrics tab to see the detailed metrics for the application.
- Click View monitoring dashboard to see the monitoring dashboard for that application.