Fix helm docs for Istio 1.9.0 (#8898)

* Fix helm docs for Istio 1.9.0

* Modify operator instructions

* Add boilerplate for helm warning

* Fix linting issue

content/en/boilerplates/helm-hub-tag.md

@@ -0,0 +1,7 @@
+---
+---
+{{< warning >}}
+Prior to Istio 1.9.0, installations using the Helm charts required hub and tag arguments:
+`--set global.hub="docker.io/istio"` and `--set global.tag="1.8.2"`. As of Istio
+1.9.0 these are is no longer required.
+{{< /warning >}}

content/en/docs/setup/install/helm/index.md

@@ -17,6 +17,8 @@ installing Istio via [Istioctl](/docs/setup/install/istioctl/) or the
 
 This feature is currently considered [alpha](/about/feature-stages/).
 
+{{< boilerplate helm-hub-tag >}}
+
 ## Prerequisites
 
 1. [Download the Istio release](/docs/setup/getting-started/#download).
@@ -68,8 +70,6 @@ to the missing `istio-token` volume.
 
     {{< text bash >}}
     $ helm install istiod manifests/charts/istio-control/istio-discovery \
-        --set global.hub="docker.io/istio" \
-        --set global.tag="{{< istio_full_version >}}" \
         -n istio-system
     {{< /text >}}
 
@@ -78,8 +78,6 @@ to the missing `istio-token` volume.
 
     {{< text bash >}}
     $ helm install istio-ingress manifests/charts/gateways/istio-ingress \
-        --set global.hub="docker.io/istio" \
-        --set global.tag="{{< istio_full_version >}}" \
         -n istio-system
     {{< /text >}}
 
@@ -88,8 +86,6 @@ to the missing `istio-token` volume.
 
     {{< text bash >}}
     $ helm install istio-egress manifests/charts/gateways/istio-egress \
-        --set global.hub="docker.io/istio" \
-        --set global.tag="{{< istio_full_version >}}" \
         -n istio-system
     {{< /text >}}
 
@@ -175,8 +171,6 @@ gateways is [actively in development](/docs/setup/upgrade/gateways/) and is cons
     {{< text bash >}}
     $ helm install istiod-canary manifests/charts/istio-control/istio-discovery \
         --set revision=canary \
-        --set global.hub="docker.io/istio" \
-        --set global.tag=<version_to_upgrade> \
         -n istio-system
     {{< /text >}}
 
@@ -221,8 +215,6 @@ preserve your custom configuration during Helm upgrades.
 
     {{< text bash >}}
     $ helm upgrade istiod manifests/charts/istio-control/istio-discovery \
-        --set global.hub="docker.io/istio" \
-        --set global.tag=<version_to_upgrade> \
         -n istio-system
     {{< /text >}}
 
@@ -231,12 +223,8 @@ preserve your custom configuration during Helm upgrades.
 
     {{< text bash >}}
     $ helm upgrade istio-ingress manifests/charts/gateways/istio-ingress \
-        --set global.hub="docker.io/istio" \
-        --set global.tag=<version_to_upgrade>\
         -n istio-system
     $ helm upgrade istio-egress manifests/charts/gateways/istio-egress \
-        --set global.hub="docker.io/istio" \
-        --set global.tag=<version_to_upgrade> \
         -n istio-system
     {{< /text >}}
 

content/en/docs/setup/install/operator/index.md

@@ -62,12 +62,12 @@ To avoid a vulnerability, ensure that the operator deployment is sufficiently se
 
     {{< text bash >}}
     $ helm install istio-operator manifests/charts/istio-operator \
-      --set hub=docker.io/istio \
-      --set tag={{< istio_full_version >}} \
       --set operatorNamespace=istio-operator \
-      --set watchedNamespaces=istio-namespace1,istio-namespace2
+      --set watchedNamespaces="istio-namespace1\,istio-namespace2"
     {{< /text >}}
 
+    {{< boilerplate helm-hub-tag >}}
+
     Note that you need to [download the Istio release](/docs/setup/getting-started/#download)
     to run the above command.
     {{< /tip >}}
@@ -237,13 +237,13 @@ You can alternatively use Helm to deploy another operator with a different revis
 
 {{< text bash >}}
 $ helm install istio-operator manifests/charts/istio-operator \
-  --set hub=docker.io/istio \
-  --set tag={{< istio_full_version >}} \
   --set operatorNamespace=istio-operator \
   --set watchedNamespaces=istio-system \
-  --set revision=1-8-1
+  --set revision=1-9-0
 {{< /text >}}
 
+{{< boilerplate helm-hub-tag >}}
+
 Note that you need to [download the Istio release](/docs/setup/getting-started/#download)
 to run the above command.
 {{< /tip >}}