CNV-52860: Passt binding for primary UDNs

Author: Shikha Jhala

modules/virt-attaching-vm-to-primary-udn-web.adoc

@@ -0,0 +1,44 @@
+// Module included in the following assemblies:
+//
+// * virt/vm_networking/virt-connecting-vm-to-primary-udn.adoc
+
+:_mod-docs-content-type: PROCEDURE                                
+[id="virt-attaching-vm-to-primary-udn-web_{context}"]                                  
+= Attaching a virtual machine to the primary user-defined network by using the web console
+
+You can connect a virtual machine (VM) to the primary user-defined network (UDN) by using the {product-title} web console. VMs that are created in a namespace where the primary UDN is configured are automatically attached to the UDN with the Layer 2 bridge network binding plugin.
+
+To attach a VM to the primary UDN by using the Plug a Simple Socket Transport (passt) binding, enable the plugin and configure the VM network interface in the web console.
+
+:FeatureName: Using the passt binding plugin to attach a VM to the primary UDN
+include::snippets/technology-preview.adoc[]
+
+.Prerequisites
+* You are logged in to the {product-title} web console.
+
+.Procedure
+. Follow these steps to enable the passt network binding plugin Technology Preview feature:
+
+.. From the *Virtualization* perspective, click *Overview*.
+
+.. On the *Virtualization* page, click the *Settings* tab.
+
+.. Click *Preview features* and set *Enable Passt binding for primary user-defined networks* to on.
+
+. From the *Virtualization* perspective, click *VirtualMachines*.
+
+. Select a VM to open the *VirtualMachine details* page.
+
+. Click the *Configuration* tab.
+
+. Click *Network*.
+
+. Click the Options menu {kebab} on the *Network interfaces* page and select *Edit*.
+
+. In the *Edit network interface* dialog, select the default pod network attachment from the *Network* list.
+
+. Expand *Advanced* and then select the *Passt* binding.
+
+. Click *Save*.
+
+. If your VM is running, restart it for the changes to take effect.

modules/virt-attaching-vm-to-primary-udn.adoc

@@ -6,15 +6,16 @@
 [id="virt-attaching-vm-to-primary-udn_{context}"]                                  
 = Attaching a virtual machine to the primary user-defined network by using the CLI
 
-You can connect a virtual machine (VM) to the primary user-defined network (UDN) by requesting the pod network attachment, and configuring the interface binding.
+You can connect a virtual machine (VM) to the primary user-defined network (UDN) by using the CLI.
 
 .Prerequisites
 * You have installed the OpenShift CLI (`oc`).
 
 .Procedure
 . Edit the `VirtualMachine` manifest to add the UDN interface details, as in the following example:
 +
-.Example `VirtualMachine` manifest
+Example `VirtualMachine` manifest:
++
 [source,yaml]
 ----
 apiVersion: kubevirt.io/v1
@@ -39,9 +40,21 @@ spec:
 ----
 <1> The namespace in which the VM is located. This value must match the namespace in which the UDN is defined.
 <2> The name of the user-defined network interface.
-<3> The name of the binding plugin that is used to connect the interface to the VM. The required value is `l2bridge`.
+<3> The name of the binding plugin that is used to connect the interface to the VM. The possible values are `l2bridge` and `passt`. The default value is `l2bridge`.
 <4> The name of the network. This must match the value of the `spec.template.spec.domain.devices.interfaces.name` field.
 
+. Optional: If you are using the Plug a Simple Socket Transport (passt) network binding plugin, set the `hco.kubevirt.io/deployPasstNetworkBinding` annotation to `true` in the `HyperConverged` custom resource (CR) by running the following command:
++
+--
+[source,terminal]
+----
+$ oc annotate hco kubevirt-hyperconverged -n kubevirt-hyperconverged hco.kubevirt.io/deployPasstNetworkBinding=true --overwrite
+----
+
+:FeatureName: Using the passt binding plugin to attach a VM to the primary UDN
+include::snippets/technology-preview.adoc[]
+--
+
 . Apply the `VirtualMachine` manifest by running the following command:
 +
 [source,terminal]

virt/vm_networking/virt-connecting-vm-to-primary-udn.adoc

@@ -1,6 +1,7 @@
 :_mod-docs-content-type: ASSEMBLY                               
 [id="virt-connecting-vm-to-primary-udn"]                                    
-= Connecting a virtual machine to a primary user-defined network                                                
+= Connecting a virtual machine to a primary user-defined network
+                                                
 include::_attributes/common-attributes.adoc[]                   
 :context: virt-connecting-vm-to-primary-udn                                    
 
@@ -26,7 +27,6 @@ You must consider the following limitations before implementing a primary UDN:
 * You cannot use the `virtctl ssh` command to configure SSH access to a VM.
 * You cannot use the `oc port-forward` command to forward ports to a VM.
 * You cannot use headless services to access a VM.
-* You cannot define readiness and liveness probes to configure VM health checks.
  
 
 [id="creating-primary-udn-web_{context}"]
@@ -59,7 +59,28 @@ include::modules/virt-creating-a-primary-cluster-udn.adoc[leveloffset=+2]
 .Next steps
 * xref:../../virt/vm_networking/virt-connecting-vm-to-primary-udn.adoc#virt-creating-udn-namespace-cli_virt-connecting-vm-to-primary-udn[Create namespaces that are associated with the cluster-scoped UDN]
 
-include::modules/virt-attaching-vm-to-primary-udn.adoc[leveloffset=+1]
+[id="attaching-vm-to-primary-udn_{context}"]
+== Attaching a virtual machine to the primary user-defined network
+
+You can connect a virtual machine (VM) to the primary user-defined network (UDN) by requesting the pod network attachment and configuring the interface binding.
+
+{VirtProductName} supports the following network binding plugins to connect the network interface to the VM:
+
+Layer 2 bridge:: The Layer 2 bridge binding creates a direct Layer 2 connection between the VM's virtual interface and the virtual switch of the UDN.
+
+Passt:: The Plug a Simple Socket Transport (passt) binding provides a user-space networking solution that integrates seamlessly with the pod network, providing better integration with the {product-title} networking ecosystem.
++
+Passt binding has the following benefits:
+
+* You can define readiness and liveness HTTP probes to configure VM health checks.
+* You can use Red Hat Advanced Cluster Security to monitor TCP traffic within the cluster with detailed insights.
+
+:FeatureName: Using the passt binding plugin to attach a VM to the primary UDN
+include::snippets/technology-preview.adoc[]
+
+include::modules/virt-attaching-vm-to-primary-udn-web.adoc[leveloffset=+2]
+
+include::modules/virt-attaching-vm-to-primary-udn.adoc[leveloffset=+2]
 
 //Excluding from ROSA because the Networking -> Multiple networks -> Primary networks section is not part of ROSA docs
 ifndef::openshift-rosa,openshift-dedicated,openshift-rosa-hcp[]