The VMware Tanzu™ Kubernetes Grid™ Integration enables operators to provision, operate, and manage enterprise-grade Kubernetes clusters. The integration itself includes an Overview and Setup instructions.
On this page, we list predefined alerts and give other details about the integration.
Predefined Alerts for the Integration
The Tanzu Kubernetes Grid integration provides the following monitoring alerts for PKS. These alerts are predefined, no additional setup is required. You can create additional alerts from the Alerts browser or from charts in the VMware Aria Operations for Applications (formerly known as Tanzu Observability by Wavefront) GUI.
| Name | Severity | Resolve After (min) |
|---|---|---|
| Node Memory Usage high | WARN | 10 |
| Node Memory Usage too high | SEVERE | 10 |
| Node CPU Usage high | WARN | 5 |
| Node CPU Usage too high | SEVERE | 5 |
| Node Storage Usage high | WARN | 10 |
| Node Storage Usage too high | SEVERE | 10 |
| Too many Pods crashing | SEVERE | 5 |
| Too many Containers not running | SEVERE | 5 |
| Node unhealthy | SEVERE | 5 |
Tanzu Kubernetes Grid Monitoring Dashboards
VMware Aria Operations for Applications includes several predefined dashboards for monitoring Tanzu Kubernetes Grid. You can use these dashboards as is, or clone and customize them.
We support dashboards for major functionality including:
- Home dashboard
- Nodes dashboard
- Namespaces dashboard
- Deployments dashboard
- Pods dashboard
- Pod containers dashboard
- Services and Replication Sets dashboard
To see the full set of dashboards, log in your product instance (https://<example>.wavefront.com).
Architecture
The Wavefront proxy pod includes four containers.
- The Kubernetes Metrics Collector monitors your worker kubelets and sends the result to the proxy.
- Telegraf receives metrics about the node, pod, and container status from kube-state-metrics, and sends those metrics to the Wavefront proxy as well.
VMware Aria Operations for Applications runs a Wavefront proxy pod inside each Kubernetes cluster created by Tanzu Kubernetes Grid. There are four containers within the Wavefront proxy pod.
Troubleshooting the Tanzu Kubernetes Grid Integration
401 Unauthorized Error
This error results if tile deployment fails when running the wavefront-alert-creation errand with 401 Unauthorized, the wavefront-access-token is invalid.
No such host/no route to host Error
If you receive a no such host/no route to host error, check that the wavefront-api-server can connect to the Internet, as follows:
curl -s 'https://vmware.wavefront.com/api/v2/source‘ \
-H 'Authorization: Bearer 1d23d456-XXXX-XXXX-XXXX-f123f12b1c21'| jq .
No Metrics
If you see no metrics in the dashboards, possible causes are:
- 401 unauthorized: check wavefront-access-token validity
- Network connectivity to wavefront-api-server
Check the status of the wavefront-proxy pod:
kubectl get pods --all-namespaces
kubectl describe pod wavefront-proxy-pod-name -n kube-system
Check wavefront-proxy pod logs:
kubectl logs wavefront-proxy-pod-name -n kube-system -c wavefront-proxy
kubectl logs wavefront-proxy-pod-name -n kube-system -c wavefront-collector
kubectl logs wavefront-proxy-pod-name -n kube-system -c kube-state-metrics