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532 link to PSA exemptions from custom/imported hardened cluster upgrade guide (#533)

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Marty Hernandez Avedon
2023-04-13 10:29:24 -04:00
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docs/getting-started/installation-and-upgrade/install-upgrade-on-a-kubernetes-cluster/upgrade-a-hardened-cluster-to-k8s-v1-25.md
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@@ -4,7 +4,13 @@ title: Upgrade a Hardened Custom/Imported Cluster to Kubernetes v1.25
Kubernetes v1.25 changes how clusters describe and implement security policies. From this version forward, [Pod Security Policies (PSPs)](https://kubernetes.io/docs/concepts/security/pod-security-policy/) are no longer available. Kubernetes v1.25 replaces them with new security objects: [Pod Security Standards (PSS)](https://kubernetes.io/docs/concepts/security/pod-security-standards/), and [Pod Security Admissions (PSAs)](https://kubernetes.io/docs/concepts/security/pod-security-admission/).
If you have custom or imported hardened clusters, you must make special preparations to ensure that the upgrade from an earlier version of Kubernetes to v1.25 or later goes smoothly.
If you have custom or imported hardened clusters, you must take special preparations to ensure that the upgrade from an earlier version of Kubernetes to v1.25 or later goes smoothly.
:::note
After you upgrade to v1.25, add the necessary Rancher namespace exemptions. See [Pod Security Admission (PSA) Configuration Templates](./psa-config-templates.md#exempting-required-rancher-namespaces) for more details.
:::
## Upgrading Imported Hardened Clusters to Kubernetes v1.25 or Later