[AKS][aks-preview] az aks nodepool upgrade: Add new parameter `--ak…

…s-custom-headers` (Azure#3658)

* Add `--aks-custom-headers` for `az aks nodepool upgrade`

* add test for nodepool upgrade

* add live_only decorator for nodepool upgrade test

* fix test

* remove misleading comment for live_only

* add generate recording file

src/aks-preview/HISTORY.md

@@ -2,6 +2,11 @@
 
 Release History
 ===============
+
+0.5.24
++++++
+* * Add "--aks-custom-headers" for "az aks nodepool upgrade"
+
 0.5.23
 +++++
 * Fix issue that `maintenanceconfiguration add` subcommand cannot work

src/aks-preview/azext_aks_preview/_help.py

@@ -967,6 +967,9 @@
         - name: --max-surge
           type: string
           short-summary: Extra nodes used to speed upgrade. When specified, it represents the number or percent used, eg. 5 or 33%
+        - name: --aks-custom-headers
+          type: string
+          short-summary: Send custom headers. When specified, format should be Key1=Value1,Key2=Value2
 """
 
 helps['aks nodepool update'] = """

src/aks-preview/azext_aks_preview/_params.py

@@ -238,6 +238,7 @@ def load_arguments(self, _):
 
     with self.argument_context('aks nodepool upgrade') as c:
         c.argument('max_surge', type=str, validator=validate_max_surge)
+        c.argument('aks_custom_headers')
 
     with self.argument_context('aks nodepool update') as c:
         c.argument('enable_cluster_autoscaler', options_list=["--enable-cluster-autoscaler", "-e"], action='store_true')

src/aks-preview/azext_aks_preview/custom.py

@@ -3308,7 +3308,8 @@ def aks_agentpool_upgrade(cmd,  # pylint: disable=unused-argument
                           kubernetes_version='',
                           no_wait=False,
                           node_image_only=False,
-                          max_surge=None):
+                          max_surge=None,
+                          aks_custom_headers=None):
     if kubernetes_version != '' and node_image_only:
         raise CLIError('Conflicting flags. Upgrading the Kubernetes version will also upgrade node image version.'
                        'If you only want to upgrade the node version please use the "--node-image-only" option only.')
@@ -3329,7 +3330,9 @@ def aks_agentpool_upgrade(cmd,  # pylint: disable=unused-argument
     if max_surge:
         instance.upgrade_settings.max_surge = max_surge
 
-    return sdk_no_wait(no_wait, client.begin_create_or_update, resource_group_name, cluster_name, nodepool_name, instance)
+    headers = get_aks_custom_headers(aks_custom_headers)
+
+    return sdk_no_wait(no_wait, client.begin_create_or_update, resource_group_name, cluster_name, nodepool_name, instance, headers=headers)
 
 
 def aks_agentpool_get_upgrade_profile(cmd,   # pylint: disable=unused-argument