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docs: update GKE ambient guide to remove manual ResourceQuota step (Fix istio/istio#56376) #16660

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docs: update GKE ambient guide to remove manual ResourceQuota step (Fix istio/istio#56376) #16660

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4bc4815
docs: update GKE ambient guide to remove manual ResourceQuota step (F…
parv18050212 Jul 13, 2025
26baa00
Update content/en/docs/ambient/install/platform-prerequisites/index.md
parv18050212 Jul 14, 2025
bd30dac
Update content/en/docs/ambient/install/platform-prerequisites/index.md
parv18050212 Jul 14, 2025
65bd2df
Update content/en/docs/ambient/install/platform-prerequisites/index.md
parv18050212 Jul 14, 2025
4a9b3a6
Merge branch 'istio:master' into fix/gke-resourcequota-56376
parv18050212 Jul 14, 2025
911fa08
docs: move GKE Namespace restrictions below Platform profile
parv18050212 Jul 14, 2025
12cedb2
final updated
parv18050212 Jul 14, 2025
7cb276f
fixed lint error
parv18050212 Jul 14, 2025
8dd2737
docs: corrected lint issues
parv18050212 Jul 16, 2025
cbf32dc
docs: fix code block formatting for lint compliance in GKE section
parv18050212 Jul 16, 2025
cb82172
docs: prepend $ to bash code blocks to fix Hugo lint errors
parv18050212 Jul 16, 2025
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8 changes: 5 additions & 3 deletions content/en/docs/ambient/install/platform-prerequisites/index.md
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Expand Up @@ -19,10 +19,12 @@ Certain Kubernetes environments require you to set various Istio configuration o

#### Namespace restrictions

On GKE, any pods with the [system-node-critical](https://kubernetes.io/docs/tasks/administer-cluster/guaranteed-scheduling-critical-addon-pods/) `priorityClassName` can only be installed in namespaces that have a [ResourceQuota](https://kubernetes.io/docs/concepts/policy/resource-quotas/) defined. By default in GKE, only `kube-system` has a defined ResourceQuota for the `node-critical` class. The Istio CNI node agent and `ztunnel` both require the `node-critical` class, and so in GKE, both components must either:
On GKE, any pods with the [system-node-critical](https://kubernetes.io/docs/tasks/administer-cluster/guaranteed-scheduling-critical-addon-pods/) `priorityClassName` can only be installed in namespaces that have a [ResourceQuota](https://kubernetes.io/docs/concepts/policy/resource-quotas/) defined. The Istio CNI node agent and `ztunnel` both require the `node-critical` class.

By default in GKE, only `kube-system` has a defined ResourceQuota for the `node-critical` class. Installing Istio with the `ambient` profile creates a ResourceQuota in the `istio-system` namespace.

To install Istio in any other namespace, you must manually create a ResourceQuota:

- Be installed into `kube-system` (_not_ `istio-system`)
- Be installed into another namespace (such as `istio-system`) in which a ResourceQuota has been manually created, for example:

{{< text syntax=yaml >}}
apiVersion: v1
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