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Add notes on registration of resource and custom metrics API servers

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King'ori Maina 2018-03-05 19:02:23 +02:00
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docs/horizontal_pod_autoscaling.md
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@ -58,6 +58,15 @@ spec:
autoscaling/v2beta1: "true"
```
If you've set the above configuration, your cluster is now ready for the
resource metrics API ([installation instruction here][k8s-metrics-server]). The
compatibility matrix is as follows:
Metrics Server | Metrics API group/version | Supported Kubernetes version
---------------|---------------------------|-----------------------------
0.2.x | `metrics.k8s.io/v1beta1` | 1.8+
0.1.x | `metrics/v1alpha1` | 1.7
### Support For Custom Metrics
Enable gathering custom metrics:
@ -76,6 +85,10 @@ spec:
horizontalPodAutoscalerUseRestClients: true
```
If you've set the above configuration, your cluster is now ready for the custom
metrics API. Register it via the API aggregation layer. If you're using
Prometheus, checkout the [custom metrics adapter for Prometheus][k8s-prometheus-custom-metrics-adapter].
## Implementation Details
These are the PRs that enable the required configuration:
@ -104,6 +117,8 @@ These are the PRs that enable the required configuration:
[k8s-aggregation-layer]: https://v1-9.docs.kubernetes.io/docs/tasks/access-kubernetes-api/configure-aggregation-layer/
[k8s-extend-api]: https://v1-9.docs.kubernetes.io/docs/concepts/api-extension/apiserver-aggregation/
[k8s-hpa]: https://v1-9.docs.kubernetes.io/docs/tasks/run-application/horizontal-pod-autoscale/
[k8s-metrics-server]: https://github.com/kubernetes-incubator/metrics-server#deployment
[k8s-prometheus-custom-metrics-adapter]: https://github.com/DirectXMan12/k8s-prometheus-adapter
[pr-1]: https://github.com/kubernetes/kops/pull/3679
[pr-2]: https://github.com/kubernetes/kops/pull/3165