merging index files for psp folder

content/rancher/v2.x/en/admin-settings/pod-security-policies/_index.md

@@ -5,3 +5,56 @@ aliases:
     -/rancher/v2.x/en/concepts/global-configuration/pod-security-policies
     -/rancher/v2.x/en/tasks/global-configuration/pod-security-policies
 ---
+
+_Pod Security Policies_ (or PSPs) are objects that control security-sensitive aspects of pod specification (like root privileges). If a pod does not meet the conditions specified in the PSP, Kubernetes will not allow it to start, and Rancher will display an error message of `Pod <NAME> is forbidden: unable to validate...`.
+
+- You can assign PSPs at the cluster or project level.
+- PSPs work through inheritance.
+
+    - By default, PSPs assigned to a cluster are inherited by its projects, as well as any namespaces added to those projects.
+    - **Exception:** Namespaces that are not assigned to projects do not inherit PSPs, regardless of whether the PSP is assigned to a cluster or project. Because these namespaces have no PSPs, workload deployments to these namespaces will fail, which is the default Kubernetes behavior.
+    - You can override the default PSP by assigning a different PSP directly to the project.
+- Any workloads that are already running in a cluster or project before a PSP is assigned will not be checked if it complies with the PSP. Workloads would need to be cloned or upgraded to see if they pass the PSP.
+
+Read more about Pod Security Policies in the [Kubernetes Documentation](https://kubernetes.io/docs/concepts/policy/pod-security-policy/).
+
+>**Best Practice:**
+>Set Pod Security at the cluster level.
+
+Using Rancher, you can create a Pod Security Policy using our GUI rather than creating a YAML file.
+
+## Creating Pod Security Policies
+
+1.	From the **Global** view, select **Security** > **Pod Security Policies** from the main menu. Then click **Add Policy**.
+
+	**Step Result:** The **Add Policy** form opens.
+
+2. Name the policy.
+
+3. Complete each section of the form. Refer to the Kubernetes documentation linked below for more information on what each policy does.
+
+	- Basic Policies:
+
+		- [Privilege Escalation](https://kubernetes.io/docs/concepts/policy/pod-security-policy/#privilege-escalation)
+		- [Host Namespaces][2]
+		- [Read Only Root Filesystems][1]
+
+	- [Capability Policies](https://kubernetes.io/docs/concepts/policy/pod-security-policy/#capabilities)
+	- [Volume Policy][1]
+	- [Allowed Host Paths Policy][1]
+	- [FS Group Policy][1]
+	- [Run As User Policy][1]
+	- [Host Ports Policy][2]
+	- [Run As User Policy][3]
+	- [SELinux Policy](https://kubernetes.io/docs/concepts/policy/pod-security-policy/#selinux)
+	- [Supplemental Groups Policy][3]
+
+### What's Next?
+
+Now that you've created a Pod Security Policy, you can apply it to clusters and projects. For more information, see [Adding a Pod Security Policy to a Cluster]({{< baseurl >}}/rancher/v2.x/en/tasks/clusters/adding-a-pod-security-policy).
+
+<!-- links -->
+
+[1]: https://kubernetes.io/docs/concepts/policy/pod-security-policy/#volumes-and-file-systems
+[2]: https://kubernetes.io/docs/concepts/policy/pod-security-policy/#host-namespaces
+[3]: https://kubernetes.io/docs/concepts/policy/pod-security-policy/#users-and-groups