delete aks Loadbalancer not possible

Question

Hi,

I am desperately trying to delete a load balancer. It was connected to an AKS cluster which no longer exists.

When I try to delete it, I get the following error message:

Failed to delete load balancer 'kubernetes'. Error: Cannot delete load balancer MC_thankfuldune-c1515963-rg_thankfuldune-c1515963_westeurope/providers/Microsoft.Network/loadBalancers/kubernetes'>kubernetes since its child resources kubernetes,aksOutboundBackendPool,gfadgad are in use by virtual machine scale set /subscriptions/xxxx-xxxx/resourceGroups/MC_thankfuldune-c1515963-rg_thankfuldune-c1515963_westeurope/providers/Microsoft.Compute/virtualMachineScaleSets/aks-systempool-27307886-vmss.

However, the reported vmss no longer exists.

Does anyone have an idea how to get rid of the load balancer? Deleting the entire RG did not work either.

thanks

Manuel

PS. I cannot delete the backend pools. Because according to the error message, they are used by the machine scale set, which no longer exists.

Failed to delete load balancer backend pool Failed to delete load balancer backend pool 'aksOutboundBackendPool'. Error: Cannot remove backend address pool aksOutboundBackendPool from load balancer since it is in use by virtual machine scale set /subscriptions/xxxx-xxxx/resourceGroups/MC_thankfuldune-c1515963-rg_thankfuldune-c1515963_westeurope/providers/Microsoft.Compute/virtualMachineScaleSets/aks-systempool-27307886-vmss.

Answer 1

Hi @Manuel please do the following

Remove load balancer associated with the VMSS:
az vmss update --resource-group <<RESOURCE_GROUP_NAME>> --name <<VMSS_NAME>> --remove virtualMachineProfile.networkProfile.networkInterfaceConfigurations[0].ipConfigurations[0].loadBalancerBackendAddressPools 0

Upgrade instances in the VMSS:
az vmss update-instances --instance-ids "*" -n <<VMSS_NAME>> -g <<RESOURCE_GROUP_NAME>>

Remove the load balancer:
az network lb delete -g <<RESOURCE_GROUP_NAME>> -n <<LB_NAME>>

I had success with this steps.

Answer 2

@AlaaBarqawi_MSFT worked for me. You have to use show command to indetify the right resources, in my case it was not 0 but 4 and I have been able to deleted once I created the dependend resources.