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Patch the warning for node exporter port

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Frank Mai
2019-04-16 22:30:16 +08:00
committed by Denise
parent 82f6ae987f
commit c8084fc0ef
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content/rancher/v2.x/en/cluster-admin/tools/monitoring/prometheus/_index.md
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@@ -28,6 +28,8 @@ The [node exporter](https://github.com/prometheus/node_exporter/blob/master/READ
When configuring Prometheus and enabling the node exporter, enter a host port in the **Node Exporter Host Port** that will not produce port conflicts with existing applications. The host port chosen must be open to allow internal traffic between Prometheus and the Node Exporter.
>**Warning:** In order for Prometheus to collect the metrics of the node exporter, after enabling cluster monitoring, you must open the **Node Exporter Host Port** in the host firewall rules to allow intranet access. By default, `9796` is used as that host port.
## Persistent Storage
>**Prerequisite:** Configure one or more [storage class]({{< baseurl >}}/rancher/v2.x/en/cluster-admin/volumes-and-storage/#adding-storage-classes) to use as [persistent storage]({{< baseurl >}}/rancher/v2.x/en/cluster-admin/volumes-and-storage/) for your Prometheus or Grafana pod.