[AKS] Add support for OSSKU Flatcar to cluster create/nodepool create

src/aks-preview/HISTORY.rst

@@ -11,6 +11,7 @@ To release a new version, please select a new version number (usually plus 1 to
 
 Pending
 +++++++
+* Add option `Flatcar` to `--os-sku` for `az aks nodepool add` and `az aks nodepool update`.
 
 18.0.0b41
 +++++++
@@ -2012,4 +2013,4 @@ Pending
 +++++
 
 * new feature `enable-cluster-autoscaler`
-* default agentType is VMSS
+* default agentType is VMSS

src/aks-preview/azext_aks_preview/_consts.py

@@ -40,6 +40,7 @@
 CONST_OS_SKU_WINDOWSANNUAL = "WindowsAnnual"
 CONST_OS_SKU_AZURELINUX = "AzureLinux"
 CONST_OS_SKU_AZURELINUX3 = "AzureLinux3"
+CONST_OS_SKU_FLATCAR = "Flatcar"
 CONST_OS_SKU_UBUNTU2204 = "Ubuntu2204"
 CONST_OS_SKU_UBUNTU2404 = "Ubuntu2404"
 CONST_OS_SKU_AZURELINUXOSGUARD = "AzureLinuxOSGuard"

src/aks-preview/azext_aks_preview/_help.py

@@ -271,7 +271,7 @@
           short-summary: The ID of a PPG.
         - name: --os-sku
           type: string
-          short-summary: The os-sku of the agent node pool. Ubuntu or CBLMariner.
+          short-summary: The os-sku of the agent node pool. Ubuntu, Ubuntu2204, Ubuntu2404, CBLMariner, AzureLinux, AzureLinux3, AzureLinuxOSGuard, AzureLinux3OSGuard, or Flatcar when os-type is Linux, default is Ubuntu if not set; Windows2019, Windows2022, Windows2025, or WindowsAnnual when os-type is Windows, the current default is Windows2022 if not set.
         - name: --enable-fips-image
           type: bool
           short-summary: Use FIPS-enabled OS on agent nodes.
@@ -1928,7 +1928,7 @@
           short-summary: The OS Type. Linux or Windows. Windows not supported yet for "VirtualMachines" VM set type.
         - name: --os-sku
           type: string
-          short-summary: The os-sku of the agent node pool. Ubuntu, Ubuntu2204, Ubuntu2404, CBLMariner, AzureLinux， AzureLinux3, AzureLinuxOSGuard, or AzureLinux3OSGuard when os-type is Linux, default is Ubuntu if not set; Windows2019, Windows2022, Windows2025, or WindowsAnnual when os-type is Windows, the current default is Windows2022 if not set.
+          short-summary: The os-sku of the agent node pool. Ubuntu, Ubuntu2204, Ubuntu2404, CBLMariner, AzureLinux, AzureLinux3, AzureLinuxOSGuard, AzureLinux3OSGuard, or Flatcar when os-type is Linux, default is Ubuntu if not set; Windows2019, Windows2022, Windows2025, or WindowsAnnual when os-type is Windows, the current default is Windows2022 if not set.
         - name: --enable-fips-image
           type: bool
           short-summary: Use FIPS-enabled OS on agent nodes.

src/aks-preview/azext_aks_preview/_params.py

@@ -93,6 +93,7 @@
     CONST_OS_DISK_TYPE_MANAGED,
     CONST_OS_SKU_AZURELINUX,
     CONST_OS_SKU_AZURELINUX3,
+    CONST_OS_SKU_FLATCAR,
     CONST_OS_SKU_CBLMARINER,
     CONST_OS_SKU_MARINER,
     CONST_OS_SKU_AZURELINUXOSGUARD,
@@ -280,6 +281,7 @@
 node_os_skus_create = [
     CONST_OS_SKU_AZURELINUX,
     CONST_OS_SKU_AZURELINUX3,
+    CONST_OS_SKU_FLATCAR,
     CONST_OS_SKU_UBUNTU,
     CONST_OS_SKU_CBLMARINER,
     CONST_OS_SKU_MARINER,
@@ -297,6 +299,7 @@
 node_os_skus_update = [
     CONST_OS_SKU_AZURELINUX,
     CONST_OS_SKU_AZURELINUX3,
+    CONST_OS_SKU_FLATCAR,
     CONST_OS_SKU_UBUNTU,
     CONST_OS_SKU_UBUNTU2204,
     CONST_OS_SKU_UBUNTU2404,

src/aks-preview/azext_aks_preview/tests/latest/test_aks_commands.py

@@ -3030,6 +3030,43 @@ def test_aks_nodepool_add_with_ossku_azurelinux3(self, resource_group, resource_
         self.cmd(
             'aks delete -g {resource_group} -n {name} --yes --no-wait', checks=[self.is_empty()])
 
+    @AllowLargeResponse()
+    @AKSCustomResourceGroupPreparer(random_name_length=17, name_prefix='clitest', location='eastus2euap')
+    def test_aks_nodepool_add_with_ossku_flatcar(self, resource_group, resource_group_location):
+        aks_name = self.create_random_name('cliakstest', 16)
+        node_pool_name = self.create_random_name('c', 6)
+        node_pool_name_second = self.create_random_name('c', 6)
+        self.kwargs.update({
+            'resource_group': resource_group,
+            'name': aks_name,
+            'node_pool_name': node_pool_name,
+            'node_pool_name_second': node_pool_name_second,
+            'ssh_key_value': self.generate_ssh_keys()
+        })
+
+        create_cmd = 'aks create --resource-group={resource_group} --name={name} ' \
+                     '--nodepool-name {node_pool_name} -c 1 ' \
+                     '--ssh-key-value={ssh_key_value} ' \
+                     '--aks-custom-headers AKSHTTPCustomFeatures=Microsoft.ContainerService/AKSFlatcarPreview ' \
+                     '--os-sku Flatcar'
+        self.cmd(create_cmd, checks=[
+            self.check('provisioningState', 'Succeeded'),
+        ])
+
+        self.cmd('aks nodepool add '
+                 '--resource-group={resource_group} '
+                 '--cluster-name={name} '
+                 '--name={node_pool_name_second} '
+                 '--aks-custom-headers AKSHTTPCustomFeatures=Microsoft.ContainerService/AKSFlatcarPreview '
+                 '--os-sku Flatcar',
+                 checks=[
+                    self.check('provisioningState', 'Succeeded'),
+                    self.check('osSku', 'Flatcar'),
+                 ])
+
+        self.cmd(
+            'aks delete -g {resource_group} -n {name} --yes --no-wait', checks=[self.is_empty()])
+
     @AllowLargeResponse()
     @AKSCustomResourceGroupPreparer(random_name_length=17, name_prefix='clitest', location='eastus2euap')
     def test_aks_nodepool_add_with_ossku_azurelinuxosguard(self, resource_group, resource_group_location):