Unable to Delete Azure Virtual Network

Question

I am attempting to delete an Azure virtual network but keep receiving the error message: "Failed to delete virtual network ''. Error: Subnet iat-5e5de8a6ba-dbsubnet is in use by /subscriptions/3909176c-e606-45ca-8108-c42fe9ad91b9/resourceGroups/wpiat/providers/Microsoft.Network/virtualNetworks/iat-f161f5eb1f-vnet/subnets/iat-5e5de8a6ba-dbsubnet/serviceAssociationLinks/9c84fe44-be2e-44e8-cd11-513b100ede35-sal and cannot be deleted. In order to delete the subnet, delete all the resources within the subnet. See aka.ms/deletesubnet." I have deleted all the resources within the subnet, but the virtual network still can't be deleted. I have attempted several workarounds with no success. There is a delegation to Microsoft.DBforMySQL/flexibleServers in the subnet iat-5e5de8a6ba-dbsubnet that I can't delete or modify. Is there any way to get free one-time technical support to help resolve this issue?

Answer 1

Hi @Jorge Insfran ,

let's see if we can get some attention to this thread:

@GitaraniSharma-MSFT , @deherman-MSFT any idea how to help or get this issue solved?

It sounds like a known issue since 2020 -> Unable to delete VNet due to serviceAssociationLinks/AppServiceLink. There is a marked answer in this thread from @suvasara-MSFT where he offers a free support ticket to resolve the issue if the workaround doesn't help.

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(If the reply was helpful please don't forget to upvote and/or accept as answer, thank you)

Regards

Andreas Baumgarten

Answer 2

@Jorge Insfran

Thank you for reaching out.

Thank you, Andreas Baumgarten for the detailed discussion above.

Yes, as the deletion blocked in the backend a support request will be required here to remove the subnet delegation and to delete the Virtual Network.

Could you please send an email to azcommunity@microsoft.com with the details below so that I can enable a one-time free support ticket for you in this case.

Subject : Attn Chaitanya

Thread URL: Link to this thread.

Subscription ID

Please let me know once you have done the same.

Hope this helps! Please let me know if you have any additional questions. Thank you! 

Answer 3

Hi @Jorge Insfran ,

you can delete the delegation by yourself. After the successful removal you should be able to delete the subnet/vNet.

Navigate to the rekated vNet and Subnet in the Azure Portal.

Open the details of the subnet. It should look similar to this:

Change the Delegate subnet to a service setting to None and click on Save

After saving ended successful try to delete the subnet/vNet again.

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(If the reply was helpful please don't forget to upvote and/or accept as answer, thank you)

Regards

Andreas Baumgarten

Answer 4

Hi @Jorge Insfran ,

related to the error message

Failed to save subnet 'iat-5e5de8a6ba-dbsubnet'. Error: 'Subnet iat-f161f5eb1f-vnet/iat-5e5de8a6ba-dbsubnet requires any of the following delegation(s) [Microsoft.DBforMySQL/flexibleServers] to reference service association link /subscriptions/3909176c-e606-45ca-8108-c42fe9ad91b9/resourceGroups/wpiat/providers/Microsoft.Network/virtualNetworks/iat-f161f5eb1f-vnet/subnets/iat-5e5de8a6ba-dbsubnet/serviceAssociationLinks/9c84fe44-be2e-44e8-cd11-513b100ede35-sal.' there are some hints/workarounds. Maybe this helps:

Cannot Remove Subnet Because of App Service VNet Integration

Error deleting subnet serviceAssociationLinks AppServiceLink

If it doesn't work with the workarounds I am afraid the only way is to get in contact with Azure Support.

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(If the reply was helpful please don't forget to upvote and/or accept as answer, thank you)

Regards

Andreas Baumgarten