Added references to the blog post for v1.23, renamed section

Author: PushkarJ

content/en/docs/tutorials/_index.md

@@ -59,8 +59,8 @@ Before walking through each tutorial, you may want to bookmark the
 
 ## Pod Security
 
-* [Applying Pod Security Standards at Cluster level](/docs/tutorials/pod-security/cluster-level-pss/)
-* [Applying Pod Security Standards at Namespace level](/docs/tutorials/pod-security/ns-level-pss/)
+* [Applying Pod Security Standards at Cluster level](/docs/tutorials/security/cluster-level-pss/)
+* [Applying Pod Security Standards at Namespace level](/docs/tutorials/security/ns-level-pss/)
 
 ## {{% heading "whatsnext" %}}
 

content/en/docs/tutorials/pod-security/_index.md

@@ -0,0 +1,5 @@
+---
+title: "Security"
+weight: 40
+---
+

content/en/docs/tutorials/security/_index.md

@@ -4,10 +4,14 @@ content_type: tutorial
 weight: 10
 ---
 
-{{% alert title="Disclaimer" %}}
+{{% alert title="Note" %}}
 This tutorial applies only for new clusters.
 {{% /alert %}}
 
+Since v1.23, Pod Security admission (PSA) is enabled by default as it [graduated
+to beta](blog/_posts/2021-12-15-pod-security-admission-beta.md). In this 
+tutorial, we will enforce `baseline` Pod Security Standard, at a cluster level.
+
 ## {{% heading "prerequisites" %}}
 
 Install the following on your workstation:
@@ -255,6 +259,11 @@ $ kubectl apply -f /tmp/pss/nginx-pod.yaml
 Warning: would violate PodSecurity "restricted:latest": allowPrivilegeEscalation != false (container "nginx" must set securityContext.allowPrivilegeEscalation=false), unrestricted capabilities (container "nginx" must set securityContext.capabilities.drop=["ALL"]), runAsNonRoot != true (pod or container "nginx" must set securityContext.runAsNonRoot=true), seccompProfile (pod or container "nginx" must set securityContext.seccompProfile.type to "RuntimeDefault" or "Localhost")
 pod/nginx created
 ```
+# Clean up
+
+Run `kind delete cluster -name psa-with-cluster-pss` and 
+`kind delete cluster -name psa-wo-cluster-pss` to delete the clusters we 
+created.
 
 # Bringing it all together
 

content/en/docs/tutorials/pod-security/cluster-level-pss.md renamed to content/en/docs/tutorials/security/cluster-level-pss.md

@@ -4,10 +4,15 @@ content_type: tutorial
 weight: 10
 ---
 
-{{% alert title="Disclaimer" %}}
+{{% alert title="Note" %}}
 This tutorial applies only for new clusters. 
 {{% /alert %}}
 
+Since v1.23, Pod Security admission (PSA) is enabled by default as it [graduated
+to beta](blog/_posts/2021-12-15-pod-security-admission-beta.md). In this
+tutorial, we will enforce `baseline` Pod Security Standard, at a namespace 
+level.
+
 # Pre-requisites
 
 Install the following on your workstation:
@@ -104,6 +109,10 @@ Warning: would violate PodSecurity "restricted:latest": allowPrivilegeEscalation
 pod/nginx created
 ```
 
+# Clean up
+
+Run `kind delete cluster -name psa-ns-level` to delete the cluster created.
+
 # Bringing it all together
 
 Running the commands in this