To add a host pool:
In the RAS console, navigate to Farm > <Site> > VDIHost pools.
Click the Tasks drop-down list above the Host Pools list and then click Add (or click the plus-sign icon). This opens the Add VDI host pool wizard.
Select Enable Host pool in site to enable the host pool. Specify the name and the description for the new host pool.
Click Next.
On the Provisioning page, select whether this host pool will contain template-based or standalone hosts:
Template: Hosts will be created dynamically from a template. You will need to create or select an existing template in the next step or later. Choosing Template as the provisioning type ensures a homogeneous host pool, which is recommended to provide consistent user experience across the host pool.
Standalone: Select one or more hosts that already exist. You'll be able to do it in the next step or you can do it later. Prior to adding hosts to host pools, ensure that hosts are domain joined and have network access to the domain environment. Note that the Standalone provisioning is considered "unmanaged" as it lacks some of the functionality, such as Autoscaling.
Depending on the selection made on the Provisioning page (above), do one of the following
Standalone: Select one or more hosts from the list to be included in the host pool (you can also add hosts to the pool later).
Template: Select a template from the list or click Create new to create a new template and specify the template settings. Versions: If you selected an existing template, select one of its versions.
Click Next.
(Templates only) On the Provisioning page, specify the following options:
Template name: Choose and type a template name.
Host name: A pattern to use when naming new hosts.
Number of hosts deployed on wizard completion: The number of hosts to deploy once the template is created. Please keep in mind that this will take some time because the hosts will be created one at a time.
Host state after the preparation: Select the power state that should be applied to a host after it is prepared. Choose from Powered on, Powered off, or Suspended. Note that when the power state is set to Power off or Suspended, the number of running (fully ready and waiting for incoming connections) hosts is controlled by the Keep available buffer setting (see above). For example, let's say the Maximum hosts value is set at 200, the number of guest hosts deployed on wizard completion is 100, and the power state after preparation is Powered off. The result of such a configuration will be 100 clones deployed and powered off.
Maximum hosts: Specify the maximum number of hosts that can be created from this template.
(Only for templates created from AWS instances) Virtual networks: Select Availability Zones for the host pool. Choose from Use the subnet associated with the template and Use specific subnets available in the VPC. If you select Use specific subnets available in the VPC, then after clicking Next you can manaully select one or several Availability Zones.
Autoscale settings: Configure autoscale settings as described in Manage host pools (RD Session Hosts).
Click Next.
On the Host pool settings page, specify the following options:
On session: Select when an action triggers.
Perform action: Select an action.
After: Select how much time must pass before action triggers.
Click Next.
On the User profile page, you can select from Do not manage by RAS (user profiles will not be managed) or FSlogix. Microsoft FSLogix Profile Container allows to maintain user context in non-persistent environments, minimize sign-in times and provides native profile experience eliminating compatibility issues. For complete instructions, please see User profile.
Click Next.
(Standalone only) On the Optimization page, configure optimization as described in Optimization.
On the Summary page, review the template summary information. You can click the Back button to correct some of the information if needed.
Finally, click Finish to create the host pool and close the wizard.