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41 lines
1.6 KiB
Markdown
41 lines
1.6 KiB
Markdown
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# Skipper Prometheus Metrics Collection
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The skipper-ingress pods should be configured to be scraped by Prometheus. This
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can be done by Prometheus service discovery using discovery of Kubernetes services
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or Kubernetes pods:
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```yaml
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apiVersion: v1
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kind: Service
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metadata:
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annotations:
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prometheus.io/path: /metrics
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prometheus.io/port: "9911"
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prometheus.io/scrape: "true"
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labels:
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application: skipper-ingress
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name: skipper-ingress
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spec:
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ports:
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- port: 80
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protocol: TCP
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targetPort: 9999
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selector:
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application: skipper-ingress
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type: ClusterIP
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```
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This [configuration](https://github.com/zalando-incubator/kubernetes-on-aws/blob/dev/cluster/manifests/prometheus/configmap.yaml#L69)
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shows how prometheus is configured in our clusters to scrape service endpoints.
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The annotations `prometheus.io/path`, `prometheus.io/port` and `prometheus.io/scrape`
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instruct Prometheus to scrape all pods of this service on the port _9911_ and
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the path `/metrics`.
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When the `kube-metrics-adapter` is started the flag `--prometheus-server` should be set so that
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the adapter can query prometheus to get aggregated metrics. When running in kubernetes it can
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be the service address of the prometheus service like `http://prometheus.kube-system`.
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With these settings the `kube-metrics-adapter` can provide `request-per-second` metrics for ingress
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objects which are present in the cluster. The prometheus instances scrape the metrics from
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the `skipper-ingress` pods. The adapter then queries prometheus to get the metric and then
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provides them to the API server when requested.
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