Fix ASM egress disable help message (#8658)

* Fix ASM egress disable help message

Signed-off-by: nshankar <nshankar@microsoft.com>

* Update version

Signed-off-by: nshankar <nshankar@microsoft.com>

* Throw error for no-op egress enablement

Signed-off-by: nshankar <nshankar@microsoft.com>

* Fix lint

Signed-off-by: nshankar <nshankar@microsoft.com>

* Update indentation

Signed-off-by: nshankar <nshankar@microsoft.com>

* update indentation

Signed-off-by: nshankar <nshankar@microsoft.com>

---------

Signed-off-by: nshankar <nshankar@microsoft.com>

Author: nshankar13

src/aks-preview/HISTORY.rst

@@ -11,6 +11,11 @@ To release a new version, please select a new version number (usually plus 1 to
 
 Pending
 +++++++
+
+
+14.0.0b2
++++++++
+* Update the `disable-egress-gateway` subcommand to fix `--help` output for the `az aks mesh` command.
 * Vendor new SDK and bump API version to 2025-01-02-preview.
 * Modify behavior for `--nodepool-initialization-taints` to ignore taints with hard effects on node pools with system mode when creating or updating a cluster.
 

src/aks-preview/azext_aks_preview/_help.py

@@ -3106,7 +3106,7 @@
 
 helps['aks mesh disable-egress-gateway'] = """
     type: command
-    short-summary: Disable an Azure Service Mesh ingress gateway.
+    short-summary: Disable an Azure Service Mesh egress gateway.
     long-summary: This command disables an Azure Service Mesh egress gateway in given cluster.
     parameters:
       - name: --istio-eg-gtw-name --istio-egressgateway-name

src/aks-preview/azext_aks_preview/managed_cluster_decorator.py

@@ -2402,6 +2402,13 @@ def _handle_egress_gateways_asm(self, new_profile: ServiceMeshProfile) -> Tuple[
                             f'Egress gateway {istio_egressgateway_name} '
                             f'in namespace {istio_egressgateway_namespace} is already disabled.'
                         )
+                    if egress.enabled and enable_egress_gateway:
+                        if egress.gateway_configuration_name == gateway_configuration_name:
+                            raise ArgumentUsageError(
+                                f'Egress gateway {istio_egressgateway_name} '
+                                f'in namespace {istio_egressgateway_namespace} is already enabled '
+                                f'with gateway configuration name {gateway_configuration_name}.'
+                            )
                     egress.enabled = enable_egress_gateway
                     # only update gateway configuration name for enabled egress gateways
                     if enable_egress_gateway:

src/aks-preview/setup.py

@@ -9,7 +9,7 @@
 
 from setuptools import setup, find_packages
 
-VERSION = "14.0.0b1"
+VERSION = "14.0.0b2"
 
 CLASSIFIERS = [
     "Development Status :: 4 - Beta",