{ACS} az aks create: Revert the changes to make --no-ssh-key default behaviour (#32231)

Author: a0x1ab

src/azure-cli/azure/cli/command_modules/acs/_help.py

@@ -95,10 +95,6 @@
   - name: --ssh-key-value
     type: string
     short-summary: Public key path or key contents to install on node VMs for SSH access. For example, 'ssh-rsa AAAAB...snip...UcyupgH azureuser@linuxvm'.
-    long-summary: |-
-      If omitted:
-          - The CLI will use '~/.ssh/id_rsa.pub' when present
-          - If that file is not present the CLI will default to server-side generated keys (equivalent to using --no-ssh-key)
   - name: --admin-username -u
     type: string
     short-summary: User account to create on node VMs for SSH access.
@@ -267,7 +263,7 @@
   - name: --no-ssh-key -x
     type: string
     short-summary: Do not use or create a local SSH key.
-    long-summary: If omitted and no local public key exists, the CLI will default to this behavior. To access nodes after creating a cluster with this option, use the Azure Portal.
+    long-summary: To access nodes after creating a cluster with this option, use the Azure Portal.
   - name: --pod-cidr
     type: string
     short-summary: A CIDR notation IP range from which to assign pod IPs when Azure CNI Overlay or Kubenet is used (On 31 March 2028, Kubenet will be retired).

src/azure-cli/azure/cli/command_modules/acs/_validators.py

@@ -65,16 +65,8 @@ def validate_ssh_key(namespace):
                            "file share, back up your keys to a safe location",
                            private_key_filepath, public_key_filepath)
         else:
-            if (not content or str(content).strip() == "" or
-                    (content == os.path.join(os.path.expanduser('~'), '.ssh', 'id_rsa.pub'))):
-                namespace.no_ssh_key = True
-                return
-            raise CLIError(
-                "The SSH key provided is not a valid RSA public key. "
-                "Provide the contents of a valid SSH public key (for example, '~/.ssh/id_rsa.pub'), "
-                "specify a path to a public key file, "
-                "or add --generate-ssh-keys as a parameter to create a new key pair."
-            )
+            raise CLIError('An RSA key file or key value must be supplied to SSH Key Value. '
+                           'You can use --generate-ssh-keys to let CLI generate one for you')
     namespace.ssh_key_value = content