Adding CloudXR tutorial (#1904)

* First CloudXR tutorial commit.

* Sidecar images for CloudXR tutorial, first commit.

* Updated codeblocks w/syntax

* Updated publish date.

* Fixed nbsp's

* Fixed nbsp's

* updated image links and frontmatter, beginning line edit

* line edit through "Before you begin"

* line edit through network tag

* line edit through TightVNC

* finished first-pass line edit

* proofreading pass

Co-authored-by: Todd Kopriva <43478937+ToddKopriva@users.noreply.github.com>

tutorials/streaming-vr-content-from-a-virtual-workstation-using-nvidia-cloudxr/index.md

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+---
+title: Stream virtual reality content from a virtual workstation using NVIDIA CloudXR
+description: Learn how to deploy, install, and test NVIDIA CloudXR on a virtual workstation on Google Cloud.
+author: adrian-a-graham
+tags: vr, ar, cloudxr, nvidia, virtual workstation, gpu
+date_published: 2021-08-05
+---
+
+Adrian Graham | Cloud Solutions Architect | Google
+
+<p style="background-color:#CAFACA;"><i>Contributed by Google employees.</i></p>
+
+This tutorial shows you how to stream virtual reality (VR) content from a virtual workstation on Google Cloud to a tetherless head-mounted display (HMD) such as
+the Oculus&nbsp;Quest&nbsp;2.
+
+NVIDIA CloudXR is supported on a variety of [HMDs](https://developer.nvidia.com/nvidia-cloudxr-sdk#:~:text=NATIVELY%20SUPPORTED%20HMDs). This tutorial provides 
+instructions only for the [Oculus Quest 2](https://www.oculus.com/quest-2/). Where indicated, refer to the
+[CloudXR SDK documentation](https://docs.nvidia.com/cloudxr-sdk/index.html) for instructions for other HMDs and devices.
+
+## Objectives
+
++ Create a virtual workstation running Windows Server 2019.
++ Install SteamVR and NVIDIA CloudXR on the workstation.
++ Load the CloudXR client on a virtual reality head-mounted display (HMD).
++ Connect to the virtual workstation through the CloudXR client.
+
+## Costs
+
+This tutorial uses billable components of Google Cloud, including the following:
+
++   [Compute Engine](https://cloud.google.com/compute), including vCPUs, memory, disk, and GPUs
++   [Internet egress](https://cloud.google.com/vpc/network-pricing) for streaming data to your HMD
+
+Use the [pricing calculator](https://cloud.google.com/products/calculator) to generate a cost estimate based on your projected usage.
+
+## Before you begin
+
+In this section, you set up some basic resources that the tutorial depends on.
+
+1.  Open [Cloud Shell](https://cloud.google.com/shell/docs/starting-cloud-shell).
+
+    Instructions in this tutorial assume that you run commands in Cloud Shell, which is a
+    command-line interface in the Cloud Console that has the Cloud SDK installed. If you prefer, you can install the
+    [Google Cloud SDK](https://cloud.google.com/sdk/docs) on your local computer and run commands there.
+
+1.  [Select or create a Google Cloud project.](https://console.cloud.google.com/projectselector2/home/dashboard)
+
+1.  [Enable billing for your project.](https://support.google.com/cloud/answer/6293499#enable-billing)
+1.  [Enable the Compute Engine API.](https://console.cloud.google.com/flows/enableapi?apiid=compute_component)
+1.  Make sure that your project has quota for [virtual workstation GPUs](https://cloud.google.com/compute/docs/gpus#gpu-virtual-workstations) in your selected
+    [zone](https://cloud.google.com/compute/docs/gpus#gpus-list). You can check GPU availability with the following command:
+
+        gcloud compute accelerator-types list
+1.  Confirm that your project contains a [default network](https://cloud.google.com/vpc/docs/vpc#default-network).
+
+    If you've [disabled the creation of default networks](https://cloud.google.com/resource-manager/docs/organization-policy/org-policy-constraints) in your 
+    organization, then you must manually create an auto-mode VPC network named `default`.
+1.  Make sure that you have access to the [NVIDIA CloudXR SDK](https://developer.nvidia.com/nvidia-cloudxr-sdk). You can register for a free account at 
+    [developer.nvidia.com](https://developer.nvidia.com/).
+
+## Set up the virtual workstation
+
+In this section, you create and configure a virtual workstation, including setting up networking and installing utilities. 
+
+### Create the virtual workstation
+
+In this section, you create a virtual workstation by starting with a configuration from the Google Cloud Marketplace and modifying some of its default settings.
+
+1.  Go to the [NVIDIA RTX Virtual Workstation - Windows Server 2019](https://console.cloud.google.com/marketplace/product/nvidia/nvidia-quadro-vws-win2019)
+    page in the Google Cloud Marketplace.
+
+1.  Click **Launch**.
+
+    If prompted to enable additional APIs, click **Enable**.
+
+    By default, this virtual workstation configuration creates an instance with 8 vCPUs, 30 GB of RAM, and a 50 GB boot disk.
+
+1.  Set the following values to better accommodate the CloudXR workload:
+
+    1.  For **Zone**, choose a zone with the lowest latency to your location.
+
+        You can use [GCP ping](https://gcping.com/) to determine the median latency to Google Cloud regions.
+
+        GPU availability is limited to certain zones. Google Cloud Marketplace only lists zones where the NVIDIA T4 GPU is available.
+
+    1.  Set **Machine type** to **Custom**.
+    1.  Increase **Cores** to 12.
+    1.  Increase **Memory** to 64 GB.
+    1.  For faster disk performance, change **Boot disk type** to **SSD Persistent Disk**.
+    1.  Change the **Boot disk size in GB** value to **200** to increase disk performance and allow for more downloaded content.
+
+1.  Note the value in the **Deployment name** field; you use this in the next section, when setting up network access.
+1.  Click **Deploy**.
+
+### Add a firewall rule and network tags
+
+In this section, you create a firewall rule to allow access to the virtual workstation instance from your local workstation. CloudXR also requires
+other ports for remote access. This firewall rule allows access only from your public IP address.
+
+1.  Determine your local workstation's public IP address by going to [ifconfig.me](https://ifconfig.me/) in a web browser.
+1.  In Cloud Shell, run the following command to create a firewall rule, replacing `[PUBLIC-IP]` with your local workstation's public IP address:
+
+        gcloud compute firewall-rules create allow-cloudxr \  
+          --direction=INGRESS \  
+          --priority=1000 \  
+          --network=default \  
+          --action=ALLOW \  
+          --rules=tcp:3389,tcp:5900,tcp:47998-48000,tcp:48002,tcp:48005,tcp:48010,udp:47998-48000,udp:48002,udp:48005,udp:48010 \  
+          --source-ranges=[PUBLIC-IP] \  
+          --target-tags=allow-cloudxr
+
+1.  Allow traffic to your workstation by adding a network tag to the instance:  
+
+        gcloud compute instances add-tags [NAME] \  
+          --tags=allow-cloudxr \  
+          --zone=[ZONE]
+
+    Replace `[NAME]` with the name of your virtual workstation instance, and replace `[ZONE]` with your virtual workstation's zone.
+
+## Set up the connection to your workstation
+
+In this section, you connect to your instance using Microsoft Remote Desktop Protocol (RDP), install an alternative remote desktop utility, disconnect from
+RDP, and reconnect using the alternative remote desktop utility. Because of a
+[limitation](https://steamcommunity.com/app/250820/discussions/0/3264459260617027967/) in SteamVR, CloudXR connections show a solid green display if connected 
+through Microsoft RDP.
+
+### Create a default Windows password and connect to your virtual workstation
+
+1.  Create a Windows password for your user with the following
+    [`gcloud` command](https://cloud.google.com/compute/docs/instances/windows/creating-passwords-for-windows-instances#gcloud):  
+
+        gcloud compute reset-windows-password [NAME] --zone=[ZONE]
+
+    Replace `[NAME]` with the name of your workstation, and replace `[ZONE]` with your workstation's zone.
+
+    You can also create a password with the
+    [Cloud Console](https://cloud.google.com/compute/docs/instances/windows/creating-passwords-for-windows-instances#console).
+
+1.  Using an RDP client, log in to your workstation using the credentials returned by the previous command.
+
+### Install Chrome
+
+Install Google Chrome on the VM instance:
+
+1.  In your RDP session, launch PowerShell.
+1.  At the prompt, enable HTTPS requests:  
+
+        [Net.ServicePointManager]::SecurityProtocol = "tls12, tls11, tls"
+
+1.  Download the Chrome installer:  
+
+        $Installer = $env:TEMP + "\chrome_installer.exe";
+            Invoke-WebRequest
+            "http://dl.google.com/chrome/install/latest/chrome_installer.exe" -OutFile
+            $Installer
+
+1.  Run the Google Chrome installer:  
+
+        Start-Process -FilePath $Installer -Args "/silent /install" -Verb RunAs -Wait
+
+    When you are prompted, allow the installer to make changes.
+
+1.  Remove the installer:  
+
+        Remove-Item $Installer
+
+### Install TightVNC or other VNC utility
+
+In this section, you install an alternative remote desktop utility, such as Chrome Remote Desktop, Teradici PCoIP, or any variant of VNC. This tutorial uses
+[TightVNC](https://www.tightvnc.com/), which is freely available and open source.
+
+1.  Launch Google Chrome on your virtual workstation.
+1.  Download and install [TightVNC](https://www.tightvnc.com/).
+1.  Select **Typical** for the setup type.
+1.  Accept the default configuration settings.
+1.  When prompted to set passwords, choose a strong password for **Remote Access**.
+
+    Do not change the value for **Administrative Password**.
+
+## Install Steam and SteamVR
+
+In this section, you download and install [Steam](https://store.steampowered.com/) and [SteamVR](https://store.steampowered.com/steamvr). Both are free to 
+download and install.
+
+1.  On your virtual workstation, download, install, and launch [Steam](https://store.steampowered.com/about/).
+1.  To install SteamVR, right-click the Steam icon on the taskbar and select **SteamVR**. The application will download and install.
+1.  Launch SteamVR to initialize the software.
+1.  Quit both Steam and SteamVR.
+
+## Install the CloudXR Server
+
+1.  On your virtual workstation, download and install [NVIDIA CloudXR SDK](https://developer.nvidia.com/nvidia-cloudxr-sdk).
+1.  Extract the downloaded archive and run `CloudXR-Setup.exe`, located under the subdirectory `Installer`.
+
+    If you are prompted with a "Windows protected your PC" warning, click **More Info**, and then click **Run anyway**.
+
+1.  When prompted, choose components for the server installation only:
+
+    1.  Select **CloudXR Server**.
+    1.  Deselect **CloudXR Client Program**.
+    1.  Ensure that the **Redistributables** checkbox is selected (required only for a first-time installation).
+
+## Install the Android Studio SDK
+
+To load files onto your HMD, you use the [Android Debug Bridge (ADB)](https://developer.android.com/studio/command-line/adb), which is part of the
+[Android Studio SDK](https://developer.android.com/studio).
+
+1.  On your local workstation, download and install the [Android Studio SDK Platform Tools](https://developer.android.com/studio/releases/platform-tools)
+    for your operating system.
+
+## Connect your workstation to your HMD
+
+1.  On your local workstation, download and extract **_but do not install_** the [NVIDIA CloudXR SDK](https://developer.nvidia.com/nvidia-cloudxr-sdk).
+1.  If required, enable Developer Mode on your device (typically only required on the
+    [Oculus Quest 2](https://developer.oculus.com/documentation/native/android/mobile-device-setup#enable-developer-mode)).
+1.  Connect your HMD to your workstation using the appropriate cable (typically USB 3.0).
+
+    You can also [connect over WiFi](https://developer.android.com/studio/command-line/adb#connect-to-a-device-over-wi-fi-android-11+).
+
+1.  If prompted, select **Allow USB Debugging** on the HMD.
+1.  Verify that your HMD is connected by running the following in a command shell (terminal on Linux or Mac OS, PowerShell on Windows):  
+
+        adb devices -l
+
+    You should see your HMD listed, along with the status of the device, as in the following example output:
+
+        List of devices attached
+        1WMHHXXXXDXXXX         device usb:1-4.3 product:hollywood model:Quest_2 device:hollywood transport_id:1
+
+    If your HMD isn't listed, check your cable connections, verify that your USB port is USB 3.0, and repeat the steps in this section.
+
+## Install the sample application
+
+In this section, you install the sample application on your HMD. Sample apps for all supported HMDs are provided with the CloudXR SDK.
+
+**Note:** This section covers client installation only for the Oculus Quest 2. For other HMDs, see the
+[NVIDIA CloudXR documentation](https://docs.nvidia.com/cloudxr-sdk/index.html).
+
+1.  In a command shell on your local workstation, go to where you extracted the NVIDIA CloudXR SDK, and then go to the subdirectory that contains the sample app
+    for the Oculus Quest 2: `Sample/Android/OculusVR`.
+
+1.  Install the sample application on your Oculus Quest 2:  
+
+        adb install -r ovr-sample.apk
+
+    On the Oculus Quest 2, the CloudXR Client is located under **Apps > Unknown Sources**.
+
+## Install the configuration file
+
+1.  On your local workstation, create a plain-text file named `CloudXRLaunchOptions.txt` containing the following:  
+
+        -s [VM-EXTERNAL-IP]
+
+    Replace `[VM-EXTERNAL-IP]` with the external IP address of your virtual workstation. You can find the external IP address of your VM using the
+    [Cloud Console](https://cloud.google.com/compute/docs/instances/view-ip-address#console), the
+    [`gcloud` command-line tool](https://cloud.google.com/compute/docs/instances/view-ip-address#gcloud), or the
+    [API](https://cloud.google.com/compute/docs/instances/view-ip-address#api).  
+
+1.  Save the file on your local workstation.
+1.  In a terminal on your local workstation, load the configuration file onto your Oculus Quest 2:  
+
+        adb push CloudXRLaunchOptions.txt /sdcard/CloudXRLaunchOptions.txt
+
+1.  Disconnect the cable from the HMD.
+
+## Launch the CloudXR client
+
+Connect to your virtual workstation using the CloudXR client on your HMD.
+
+1.  On your local workstation, connect to your virtual workstation using a VNC client.
+1.  Launch SteamVR.
+
+    You will see the message *Headset Not Detected*:  
+
+    ![image](https://storage.googleapis.com/gcp-community/tutorials/streaming-vr-content-from-a-virtual-workstation-using-nvidia-cloudxr/headset-not-detected.png)
+
+1.  On your HMD, start the CloudXR Client.
+
+    The first time you launch the application, you are prompted on your HMD to grant permissions to allow access.
+
+1.  Follow the prompts to allow access.
+
+When the connection is established, the SteamVR app shows the connection status of your HMD and controllers:
+
+![image](https://storage.googleapis.com/gcp-community/tutorials/streaming-vr-content-from-a-virtual-workstation-using-nvidia-cloudxr/headset-connected.png)
+
+The default CloudXR environment appears in your HMD display. You can preview this display on your virtual workstation by right-clicking the
+SteamVR icon on the taskbar and selecting **Display VR View**:
+
+![image](https://storage.googleapis.com/gcp-community/tutorials/streaming-vr-content-from-a-virtual-workstation-using-nvidia-cloudxr/display-vr-view.png)
+
+A window will open showing a preview of the CloudXR environment:
+
+![image](https://storage.googleapis.com/gcp-community/tutorials/streaming-vr-content-from-a-virtual-workstation-using-nvidia-cloudxr/cloudxr-env.png)
+
+You can now launch SteamVR games or experiences on your virtual workstation, where they will be streamed to your HMD. Any application that uses the
+[OpenVR SDK](https://en.wikipedia.org/wiki/OpenVR) will play over CloudXR, even ones not launched from SteamVR.
+
+## Clean up
+
+To avoid incurring charges to your Google Cloud account for the resources used in this tutorial, you can delete the project:
+
+1.  In the Cloud Console, go to the [Projects page](https://console.cloud.google.com/iam-admin/projects).
+1.  In the project list, select the project you want to delete and click **Delete**.
+1.  In the dialog, type the project ID, and then click **Shut down** to delete the project.
+
+## What's next
+
++   Install SteamVR games and experiences and play them through your HMD.
++   Learn more about [NVIDIA CloudXR SDK](https://developer.nvidia.com/nvidia-cloudxr-sdk).
++   Read the [CloudXR documentation](https://docs.nvidia.com/cloudxr-sdk/index.html).
++   Learn more about [creating a virtual workstation](https://cloud.google.com/architecture/creating-a-virtual-workstation).