Monitoring
Rancher has a Cluster Tool for Monitoring that leverages Grafana and Prometheus. You can utilize this tool and integrate it with Kubewarden to view overall metrics for a Policy Server or metrics pertaining to a given policy.
Issues with Rancher Manager v2.7.1
can cause issues with the Metrics dashboard view. Version v2.7.2
or greater is recommended.
You will need a cluster with at least 4 cores to install the Monitoring tool.
Prerequisites​
The Prometheus Operator is required. Follow these instructions to install it.
Install​
1. Create the ServiceMonitors​
- Import the manifest to create the ServiceMonitors
- You need to specify the correct namespace where Kubewarden is installed
Adapted from here
apiVersion: monitoring.coreos.com/v1
kind: ServiceMonitor
metadata:
name: kubewarden-controller
namespace: cattle-kubewarden-system
spec:
endpoints:
- interval: 10s
port: metrics
namespaceSelector:
matchNames:
- cattle-kubewarden-system
selector:
matchLabels:
app.kubernetes.io/name: kubewarden-controller
---
apiVersion: monitoring.coreos.com/v1
kind: ServiceMonitor
metadata:
name: kubewarden-policy-server
namespace: cattle-kubewarden-system
spec:
endpoints:
- interval: 10s
port: metrics
namespaceSelector:
matchNames:
- cattle-kubewarden-system
selector:
matchLabels:
app: kubewarden-policy-server-default
2. Enable telemetry for your rancher-kubewarden-controller
resource​
- Navigate to Apps & Marketplace -> Installed Apps
- Select the
Edit/Upgrade
action for yourrancher-kubewarden-controller
resource - Edit the YAML for
telemetry
to beenabled: "true"
and ensure the metrics port is correct
telemetry:
metrics:
enabled: True
port: 8080
You may need to redeploy your Monitoring resources for the new ConfigMap to be loaded. You can easily do this from Workloads -> Deployments. Select all the resources in the cattle-monitoring-system
namespace and click on the Redeploy
action.
3. Create the Grafana Dashboard ConfigMap for Policies and Policy Server​
This method is suited for air gapped installations
The dashboards are unique between Policy Server and Policies, thus will need to be created separately.
Within the detail view for a Policy Server or a specific Policy:
- Navigate to the "Metrics" tab
- Follow the prompt to create the ConfigMap
- Reload the page to update the Grafana view (Grafana may be slow to acknowledge the new dashboard)
You should be able to view the metrics for a Policy Server or any given Policy on the detail page for each respective resource. You can also view the Kubewarden dashboards within the Grafana UI or the events from the Prometheus UI.