Forum Discussion
How to add a new host to WVD hostpool?
- You should find your answer here: https://docs.microsoft.com/en-us/azure/virtual-desktop/create-host-pools-powershell
Scroll down to the section create virtual machines for the host pool.
MicrosoftBraguzz : Is the use case to "expand" the host pool with a few more VMs based on the same image? Or is it to "replace" the host pool with a new number of VMs based off a new image?
To "Expand":
- Re-run the Provision a host pool Azure Marketplace offering or Create and provision WVD host pool GitHub ARM template.
- Use the same "rdshNamePrefix".
- For the number of VMs, enter the new total you would like to have. If you are expanding from 3 VMs to 5 VMs, enter 5.
To replace:
- You can run the Update existing host pool GitHub ARM template (entering the details for the updated image). or
- You can run the create templates but provide a new "rdshNamePrefix"( Provision a host pool Azure Marketplace offering or Create and provision WVD host pool GitHub ARM template) then later remove the old VMs
Christian_Montoya Hi Christian. I have tried three different ways to add servers to a host pool. It seems as though it is consstantly failing because of a conflict and I'm assuming because there is another computer there that it's trying to re-create with the same name? Not sure. But I've tried manually, Provision a host pool and the arm template and I cannot add more servers to the pool. This iis essential as we are ready to increase this to a wider audience so we will need to get specifics down on how to expand these pools. Thank you for your help.
{"code":"DeploymentFailed","message":"At least one resource deployment operation failed. Please list deployment operations for details. Please see https://aka.ms/DeployOperations for usage details.","details":[{"code":"Conflict","message":"{\r\n \"error\": {\r\n \"code\": \"PropertyChangeNotAllowed\",\r\n \"message\": \"Changing property 'imageReference' is not allowed.\",\r\n \"target\": \"imageReference\"\r\n }\r\n}"}]}
{"code":"DeploymentFailed","message":"At least one resource deployment operation failed. Please list deployment operations for details. Please see https://aka.ms/DeployOperations for usage details.","details":[{"code":"Conflict","message":"{\r\n \"status\": \"Failed\",\r\n \"error\": {\r\n \"code\": \"ResourceDeploymentFailure\",\r\n \"message\": \"The resource operation completed with terminal provisioning state 'Failed'.\",\r\n \"details\": [\r\n {\r\n \"code\": \"DeploymentFailed\",\r\n \"message\": \"At least one resource deployment operation failed. Please list deployment operations for details. Please see https://aka.ms/DeployOperations for usage details.\",\r\n \"details\": [\r\n {\r\n \"code\": \"Conflict\",\r\n \"message\": \"{\\r\\n \\\"error\\\": {\\r\\n \\\"code\\\": \\\"PropertyChangeNotAllowed\\\",\\r\\n \\\"message\\\": \\\"Changing property 'imageReference' is not allowed.\\\",\\r\\n \\\"target\\\": \\\"imageReference\\\"\\r\\n }\\r\\n}\"\r\n }\r\n ]\r\n }\r\n ]\r\n }\r\n}"}]}
I have tested this using the arm templates and it works well. Have you changed any parameters since the original deployment?
One thing I noticed is that it appears you have to keep the majority of settings exactly the same as the initial deployment. The ones I have changed successfully using the template are as follows
- rdshNumberOfInstances (i.e. from 3 to 4)
- rdshVmSize (Different SKU)
When I tried to us a different upn for the parameters in the 'domain join process' within the arm template it failed
HandA Those are the only two I changed in the template and used my AD Domain Admin creds to join it to the domain which is different than my global admin in Azure. Anyway, I manually added a VM using the instructions provided earlier in this thread and it was a lot better of an experience. The administrative tasks for this service are rather clunky and there isn't a lot of detail with the error log that can point you in the specific direction. It's basically just says there is an error with a variable that was changed. Well, which one?
