CAU - no reinstall possible - resource corpse HELP needed

Question

Hi,

installed the CAU some weeks ago, everything fine. Now it does not work and we wanted to remove it and start from the scratch.

ended up in deleting the AD object manually and tried the several commands without success

remove-CauClusterRole
Remove-ClusterResourceType “ClusterAwareUpdatingResource”
Get-Cluster | Set-ClusterParameter "XXX" -Delete
there are still entries in get-cluster | Get-ClusterParameter

Object Name Value Type

---

FFOVMCS CauSelfUpdateCredType 0 UInt32
FFOVMCS CauCredentialResourceName CAUFFOVM4a4 String
FFOVMCS CauResourceName CAUFFOVM4a4Resource String
FFOVMCS CauLastRunCompleted 132419220033274094 UInt64
FFOVMCS CauIsAliveRequested 2020-11-17T11:52:33.6892658Z:26:FFOVMCN3:9 String
in get-clusterresource

there is no resource with this name

I can perform the self check and it's all passed but I'm not able to configure the CAU obviously because it's resource is not available.

Someone could provide some guidance how to continue troubleshooting. I'm not able to delete or configure the CAU. also Enable or disable is not possible and I can't start with a new CAU installation if there is still a resource corpse in

Answer 1

Hi,
Could you please tell me if you deleted AD object manually at first, if yes, how did you delete it, using PowerShell or in GUID?
And if there was any error when you reinstalled CAU, if yes, please show me the detailed error information.
I did some tests in my lab and successfully configured CAU:
a) This is my cluster resource with CAU.

This is my AD object of CAU.

Then I remove CAU with the following cmd in Powershell:
Remove-CauClusterRole -ClusterName "HyperCluster" -Force
And CAU is successfully removed as you can see in the picture:

And the AD object is offline.

Then I configure CAU successfully using the original AD object:


b) Once again, after removing CAU, I delete the original AD object without creating a new one:
Then I also succeed in configuring CAU, and when I check my AD users and computers, I find that the original AD object appeares again.

c) Now I delete AD object at first in GUID and find that CAU Resource is still there.
After I remove It, there are some entries in get-cluster | Get-ClusterParameter.
At last I add the role successfully again.

Thanks for your time!
Best Regards,
Mico Mi

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Answer 2

Hi,

thx for your reply. I'll try to to describe it with screens.

no chance to remove the cau role because of the corpse of the old Resource

Yes, I've deleted accidentially the AD account of the CAU but also a restore of this account does not make any difference

I can open the CAU wizard nevertheless but not configure it because of the state of this missing resource

there is no CAU entry in Get-ClusterResource but there is still an entry in the ClusterParameters

Answer 3

Yes, correct. There is no CAU entry in Get-ClusterResource but in Get-ClusterParameters.

I'm not able to remove or add the CAU role because of the Resource corpse CAUFFOVMa4aResource I don't know how to get rid off.

All nodes have been updated and restarted yesterday... same result as in my screenshot. By opening the CAU wizard he tries to get the status of the Resource (that is not existing somehow) and then fails to retrieve the status...

So I'm stuck

Answer 4

Hi,

any idea?

Regards

Answer 5

Sorry I just cannot find any solutions in my test.
Maybe you can use the following command in PowerShell to refresh the cluster configuration of each VM and check if it works.
get-clusterresource -c your-cluster-name | where {$_.resourcetype.name -eq 'virtual machine configuration'} | Update-ClusterVirtualMachineConfiguration

Best Regards,
Mico Mi