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improve display of metrics/telemetry-api (#13029) 

* improve display of metrics/telemetry-api

* Update content/en/docs/tasks/observability/metrics/telemetry-api/index.md

Co-authored-by: Faseela K <k.faseela@gmail.com>

---------

Co-authored-by: Faseela K <k.faseela@gmail.com>
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zirain 2023-04-11 19:00:01 +08:00 committed by GitHub
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content/en/docs/tasks/observability/metrics/telemetry-api/index.md
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@ -9,25 +9,29 @@ test: yes
Telemetry API has been in Istio as a first-class API for quite sometime now.
Previously, users had to configure metrics in the `telemetry` section of the Istio configuration.
This task shows you how to customize the metrics that Istio generates with Telemetry API.
## Before you begin
[Install Istio](/docs/setup/) in your cluster and deploy an application.
Telemetry API can not work together with `EnvoyFilter`. For more details please checkout this [issue](https://github.com/istio/istio/issues/39772).
Starting with Istio version `1.18`, the stats `EnvoyFilter` will not be installed by default.
For versions of Istio before `1.18`, you should install with following `IstioOperator` configuration:
{{< text yaml >}}
apiVersion: install.istio.io/v1alpha1
kind: IstioOperator
spec:
values:
telemetry:
enabled: true
v2:
enabled: false
{{< /text >}}
Telemetry API can not work together with `EnvoyFilter`. For more details please checkout this [issue](https://github.com/istio/istio/issues/39772).
* Starting with Istio version `1.18`, the stats `EnvoyFilter` will not be installed by default.
* For versions of Istio before `1.18`, you should install with the following `IstioOperator` configuration:
{{< text yaml >}}
apiVersion: install.istio.io/v1alpha1
kind: IstioOperator
spec:
values:
telemetry:
enabled: true
v2:
enabled: false
{{< /text >}}
## Override metrics