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Promote Helm installation to alpha (#8443) 

* Promote Helm installation to alpha

Integration tests have been to master and release-1.8 to support this promotion.

Addressed suggestions made in https://github.com/istio/istio.io/issues/8374

* Minor language fix

* Fixed spelling

* Remove warning for alpha and added link to feature stages doc

* Fix broken link

* Fix formatting
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Neeraj Poddar 2020-11-06 07:26:35 -07:00 committed by GitHub
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@ -1,5 +1,5 @@
---
title: Install with Helm [Experimental]
title: Install with Helm
linktitle: Install with Helm
description: Install and configure Istio for in-depth evaluation.
weight: 27
@ -9,18 +9,14 @@ icon: helm
test: no
---
{{< warning >}}
This feature is actively in [development](https://github.com/istio/community/blob/master/FEATURE-LIFECYCLE.md) and is
considered `pre-alpha`.
{{< /warning >}}
Follow this guide to install and configure an Istio mesh using
[Helm](https://helm.sh/docs/) for in-depth evaluation.
The Helm charts used in this guide are the same underlying charts used when
[Helm](https://helm.sh/docs/) for in-depth evaluation. The Helm charts used
in this guide are the same underlying charts used when
installing Istio via [Istioctl](/docs/setup/install/istioctl/) or the
[Operator](/docs/setup/install/operator/).
This feature is currently considered [alpha](/about/feature-stages/).
## Prerequisites
1. [Download the Istio release](/docs/setup/getting-started/#download).
@ -116,13 +112,14 @@ $ kubectl apply -f $HOME/ISTIO_RESOURCE_BACKUP.yaml
### Migrating from non-Helm installations
If you're migrating from a version of Istio installed using `istioctl` or
Operator to Helm, you need to delete your current installation and re-install
Istio using Helm as described above.
Operator to Helm, you need to delete your current Istio control plane resources
and and re-install Istio using Helm as described above. When deleting your
current Istio installation, you must not remove the Istio Custom Resource
Definitions (CRDs) as that can lead to loss of your custom Istio resources.
{{< warning >}}
Uninstalling Istio can cause your custom Istio configurations to be lost
permanently so it is highly recommended to take a backup of your Istio
configuration before deleting Istio in your cluster.
It is highly recommended to take a backup of your Istio resources using steps
described above before deleting current Istio installation in your cluster.
{{< /warning >}}
You can follow steps mentioned in the
@ -244,7 +241,7 @@ installed above.
$ kubectl delete namespace istio-system
{{< /text >}}
### Deleting CRDs installed by Istio
### (Optional) Deleting CRDs installed by Istio
Deleting CRDs permanently removes any Istio resources you have created in your
cluster. To permanently delete Istio CRDs installed in your cluster: