Disable Public FQDN for Private AKS Clusters

01 Run account list command (Windows/macOS/Linux) with custom output filters to list the IDs of the cloud subscriptions available in your Azure cloud account:

az account list
  --query '[*].id'

02 The command output should return the requested subscription identifiers (IDs):

[
	"abcdabcd-1234-abcd-1234-abcdabcdabcd",
	"abcd1234-abcd-1234-abcd-abcd1234abcd"
]

03 Run account set command (Windows/macOS/Linux) with the ID of the Azure cloud subscription that you want to examine as the identifier parameter to set the selected subscription to be the current active subscription (the command does not produce an output):

az account set
  --subscription abcdabcd-1234-abcd-1234-abcdabcdabcd

04 Run aks list command (Windows/macOS/Linux) with custom query filters to list the name and the associated resource group for each Azure Kubernetes Service (AKS) cluster available in the selected Azure subscription:

az aks list
  --output table
  --query '[*].{name:name, resourceGroup:resourceGroup}'

05 The command output should return the requested AKS cluster names:

Name                             ResourceGroup
-------------------------------  ------------------------------
cc-project5-private-aks-cluster  cloud-shell-storage-westeurope
cc-private-data-mining-cluster   cloud-shell-storage-westeurope

06 Run aks show command (Windows/macOS/Linux) with the name of the AKS cluster that you want to examine (and the associated resource group) as identifier parameters, to determine if selected Azure AKS cluster is private:

az aks show
  --name cc-project5-private-aks-cluster
  --resource-group cloud-shell-storage-westeurope
  --query '{enablePrivateCluster:apiServerAccessProfile.enablePrivateCluster}'

07 The command output should return the requested configuration information:

{
	"enablePrivateCluster": true
}

08 Run again aks show command (Windows/macOS/Linux) to describe the configuration status of the Public FQDN feature, available for the selected private AKS cluster:

az aks show
  --name cc-project5-private-aks-cluster
  --resource-group cloud-shell-storage-westeurope
  --query 'apiServerAccessProfile.enablePrivateClusterPublicFqdn'

09 The command output should return the requested configuration status:

true

10 Repeat steps no. 6 - 9 for each AKS cluster available within the selected Azure subscription.

11 Repeat steps no. 3 – 10 for each subscription created in your Microsoft Azure cloud account.

01 Run account list command (Windows/macOS/Linux) with custom output filters to list the IDs of the cloud subscriptions available in your Azure cloud account:

az account list
  --query '[*].id'

02 The command output should return the requested subscription identifiers (IDs):

[
	"abcdabcd-1234-abcd-1234-abcdabcdabcd",
	"abcd1234-abcd-1234-abcd-abcd1234abcd"
]

03 Run account set command (Windows/macOS/Linux) with the ID of the Azure cloud subscription that you want to examine as the identifier parameter to set the selected subscription to be the current active subscription (the command does not produce an output):

az account set
  --subscription abcdabcd-1234-abcd-1234-abcdabcdabcd

04 Run aks update command (OSX/Linux/UNIX) with the name of the private AKS cluster that you want to configure (and the associated resource group) as the identifier parameters, to disable the Public FQDN feature for the selected Azure AKS cluster:

az aks update
  --name cc-project5-private-aks-cluster
  --resource-group cloud-shell-storage-westeurope
  --disable-public-fqdn

05 The command output should return the configuration information available for the modified AKS cluster:

{
	"aadProfile": {
		"adminGroupObjectIDs": [
			"abcdabcd-1234-abcd-1234-abcdabcdabcd"
		],
		"enableAzureRbac": true,
		"managed": true,
		"tenantId": "abcdabcd-1234-abcd-1234-abcdabcdabcd"
	},

	...

	"apiServerAccessProfile": {
		"authorizedIpRanges": null,
		"disableRunCommand": null,
		"enablePrivateCluster": true,
		"enablePrivateClusterPublicFqdn": false,
		"privateDnsZone": "system"
	}
}

06 Repeat steps no. 4 and 5 for each AKS cluster that you want to configure, available in the selected subscription.

07 Repeat steps no. 3 – 6 for each subscription created in your Microsoft Azure cloud account.