Node level metrics are not available in Prometheus (installed with Istio 1.6)
I installed Istio 1.6, using istioctl install --set profile=demo. But I could only couple of metrics related to Kubernetes nodes. I can see configuration related Kubernetes Node:
kubernetes_sd_configs:
- role: node relabel_configs:
- action: labelmap
regex: __meta_kubernetes_node_label_(.+)
- target_label: __address__
replacement: kubernetes.default.svc:443
- source_labels: [__meta_kubernetes_node_name]
regex: (.+)
target_label: __metrics_path__
replacement: /api/v1/nodes/${1}/proxy/metricsDo I need to install node exporter daemonset?
Thanks
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1 Answer
You must have missed some step. I reproduced and it is looking good on my end. <br>
Double check this steps:
Verify that the Prometheus service is running in the cluster:
$ kubectl -n istio-system get svc prometheusLaunch the Prometheus UI
istioctl dashboard prometheusExecute a Prometheus query(click <kbd>Execute</kbd> ). E.g.:
istio_requests_totalGenerate some traffic against the product page:
export INGRESS_HOST=$(minikube ip)
export INGRESS_PORT=$(kubectl -n istio-system get service istio-ingressgateway -o jsonpath='{.spec.ports[?(@.name=="http2")].nodePort}')
export GATEWAY_URL=$INGRESS_HOST:$INGRESS_PORT
curl http://$GATEWAY_URL/productpage
Edit: for node metrics
Yes, you are right: node exporter is not included.
Fastest way to add it manually is using Helm(literally one line after helm is prepared):
// Install helm
curl -L https://git.io/get_helm.sh | bash
// Install tiller
helm init
// Deploy node-exporter
helm install stable/prometheus-node-exporter
// Launch prometheus
istioctl dashboard prometheus
// Or even better, grafana
istioctl dashboard grafana
If you are using grafana, you can import dashboard ID: 11074 for a fancy display of the data gathered from node exporter:
