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Update index.md

reviewable/pr2142/r1
caiyixiang 2017-01-17 18:21:05 +08:00 committed by Jared
parent 0bc2efe4d2
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docs/user-guide/horizontal-pod-autoscaling/index.md
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@ -26,7 +26,7 @@ The autoscaler is implemented as a control loop.
It periodically queries CPU utilization for the pods it targets. It periodically queries CPU utilization for the pods it targets.
(The period of the autoscaler is controlled by `--horizontal-pod-autoscaler-sync-period` flag of controller manager. (The period of the autoscaler is controlled by `--horizontal-pod-autoscaler-sync-period` flag of controller manager.
The default value is 30 seconds). The default value is 30 seconds).
Then, it compares the arithmetic mean of the pods' CPU utilization with the target and adjust the number of replicas if needed. Then, it compares the arithmetic mean of the pod's CPU utilization with the target and adjust the number of replicas if needed.
CPU utilization is the recent CPU usage of a pod divided by the sum of CPU requested by the pod's containers. CPU utilization is the recent CPU usage of a pod divided by the sum of CPU requested by the pod's containers.
Please note that if some of the pod's containers do not have CPU request set, Please note that if some of the pod's containers do not have CPU request set,
@ -90,7 +90,7 @@ The cluster has to be started with `ENABLE_CUSTOM_METRICS` environment variable
### Pod configuration ### Pod configuration
The pods to be scaled must have cAdvisor-specific custom (aka application) metrics endpoint configured. The configuration format is described [here](https://github.com/google/cadvisor/blob/master/docs/application_metrics.md). Kubernetes expects the configuration to The pods to be scaled must have cAdvisor-specific custom (aka application) metrics endpoint configured. The configuration format is described [here](https://github.com/google/cadvisor/blob/master/docs/application_metrics.md). Kubernetes expects the configuration to
be placed in `definition.json` mounted via a [config map](/docs/user-guide/configmap/) in `/etc/custom-metrics`. A sample config map may look like this: be placed in `definition.json` mounted via a [configMap](/docs/user-guide/configmap/) in `/etc/custom-metrics`. A sample config map may look like this:
```yaml ```yaml
apiVersion: v1 apiVersion: v1