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update standard metrics documentation (#9555) 

* update standard metrics documentation

* maybe fix lint

* update wording
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Douglas Reid 2021-04-19 15:54:16 -07:00 committed by GitHub
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content/en/docs/reference/config/metrics/index.md
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@ -9,10 +9,8 @@ aliases:
---
The following are the standard service level metrics exported by Istio.
Istio standard metrics are directly exported by the Envoy proxy since Istio 1.5.
The telemetry component is [implemented](https://github.com/istio/proxy/tree/master/extensions/stats) as a [Proxy-wasm](https://github.com/proxy-wasm/spec) plugin.
In prior Istio releases Mixer produced these metrics.
The telemetry component is [implemented](https://github.com/istio/proxy/tree/master/extensions/stats) as a [Proxy-wasm](https://github.com/proxy-wasm/spec) plugin.
## Metrics
@ -113,3 +111,9 @@ For TCP traffic, Istio generates the following metrics:
destination_canonical_service
destination_canonical_revision
{{< /text >}}
* **Destination Cluster**: This identifies the cluster of the destination workload.
This is set by: `global.multiCluster.clusterName` at cluster install time.
* **Source Cluster**: This identifies the cluster of the source workload.
This is set by: `global.multiCluster.clusterName` at cluster install time.