VMware: Improve module vmware_host_config_manager (#46264)

* Improve module description
* Add check mode support and change message

lib/ansible/modules/cloud/vmware/vmware_host_config_manager.py

@@ -16,9 +16,9 @@ ANSIBLE_METADATA = {
 DOCUMENTATION = r'''
 ---
 module: vmware_host_config_manager
-short_description: Manage advance configurations about an ESXi host
+short_description: Manage advanced system settings of an ESXi host
 description:
-- This module can be used to manage advance configuration information about an ESXi host when ESXi hostname or Cluster name is given.
+- This module can be used to manage advanced system settings of an ESXi host when ESXi hostname or Cluster name is given.
 version_added: '2.5'
 author:
 - Abhijeet Kasurde (@Akasurde)
@@ -31,23 +31,23 @@ options:
   cluster_name:
     description:
     - Name of the cluster.
-    - Settings are applied to every ESXi host system in given cluster.
+    - Settings are applied to every ESXi host in given cluster.
     - If C(esxi_hostname) is not given, this parameter is required.
   esxi_hostname:
     description:
     - ESXi hostname.
-    - Settings are applied to this ESXi host system.
+    - Settings are applied to this ESXi host.
     - If C(cluster_name) is not given, this parameter is required.
   options:
     description:
-    - A dictionary of advance configuration parameters.
+    - A dictionary of advanced system settings.
     - Invalid options will cause module to error.
     default: {}
 extends_documentation_fragment: vmware.documentation
 '''
 
 EXAMPLES = r'''
-- name: Manage Log level setting for all ESXi Host in given Cluster
+- name: Manage Log level setting for all ESXi hosts in given Cluster
   vmware_host_config_manager:
     hostname: '{{ vcenter_hostname }}'
     username: '{{ vcenter_username }}'
@@ -57,7 +57,7 @@ EXAMPLES = r'''
         'Config.HostAgent.log.level': 'info'
   delegate_to: localhost
 
-- name: Manage Log level setting for an ESXi Host
+- name: Manage Log level setting for an ESXi host
   vmware_host_config_manager:
     hostname: '{{ vcenter_hostname }}'
     username: '{{ vcenter_username }}'
@@ -67,7 +67,7 @@ EXAMPLES = r'''
         'Config.HostAgent.log.level': 'verbose'
   delegate_to: localhost
 
-- name: Manage multiple settings for an ESXi Host
+- name: Manage multiple settings for an ESXi host
   vmware_host_config_manager:
     hostname: '{{ vcenter_hostname }}'
     username: '{{ vcenter_username }}'
@@ -123,6 +123,7 @@ class VmwareConfigManager(PyVmomi):
         return False
 
     def set_host_configuration_facts(self):
+        changed_list = []
         changed = False
         for host in self.hosts:
             option_manager = host.configManager.advancedOption
@@ -164,9 +165,22 @@ class VmwareConfigManager(PyVmomi):
                     if option_value != host_facts[option_key]['value']:
                         change_option_list.append(vim.option.OptionValue(key=option_key, value=option_value))
                         changed = True
+                        changed_list.append(option_key)
                 else:  # Don't silently drop unknown options. This prevents typos from falling through the cracks.
                     self.module.fail_json(msg="Unknown option %s" % option_key)
             if changed:
+                if self.module.check_mode:
+                    changed_suffix = ' would be changed.'
+                else:
+                    changed_suffix = ' changed.'
+                if len(changed_list) > 2:
+                    message = ', '.join(changed_list[:-1]) + ', and ' + str(changed_list[-1])
+                elif len(changed_list) == 2:
+                    message = ' and '.join(changed_list)
+                elif len(changed_list) == 1:
+                    message = changed_list[0]
+                message += changed_suffix
+                if self.module.check_mode is False:
                     try:
                         option_manager.UpdateOptions(changedValue=change_option_list)
                     except (vmodl.fault.SystemError, vmodl.fault.InvalidArgument) as e:
@@ -175,8 +189,10 @@ class VmwareConfigManager(PyVmomi):
                     except vim.fault.InvalidName as e:
                         self.module.fail_json(msg="Failed to update option/s as one or more OptionValue "
                                                   "objects refers to a non-existent option : %s" % to_native(e.msg))
+            else:
+                message = 'All settings are already configured.'
 
-        self.module.exit_json(changed=changed)
+        self.module.exit_json(changed=changed, msg=message)
 
 
 def main():
@@ -189,6 +205,7 @@ def main():
 
     module = AnsibleModule(
         argument_spec=argument_spec,
+        supports_check_mode=True,
         required_one_of=[
             ['cluster_name', 'esxi_hostname'],
         ]

test/integration/targets/vmware_host_config_manager/tasks/main.yml

@@ -86,3 +86,37 @@
   assert:
     that:
         - all_hosts_result.changed
+
+- name: Change facts about all hosts in given cluster in check mode
+  vmware_host_config_manager:
+    hostname: "{{ vcsim }}"
+    username: "{{ vcsim_instance.json.username }}"
+    password: "{{ vcsim_instance.json.password }}"
+    cluster_name: "{{ ccr1 }}"
+    options:
+      'Config.HostAgent.log.level': 'verbose'
+    validate_certs: no
+  register: all_hosts_result_check_mode
+  check_mode: yes
+
+- name: ensure changes are done to all hosts
+  assert:
+    that:
+        - all_hosts_result_check_mode.changed
+
+- name: Change facts about a given host in check mode
+  vmware_host_config_manager:
+    hostname: "{{ vcsim }}"
+    username: "{{ vcsim_instance.json.username }}"
+    password: "{{ vcsim_instance.json.password }}"
+    esxi_hostname: "{{ host1 }}"
+    options:
+      'Config.HostAgent.log.level': 'info'
+    validate_certs: no
+  register: host_result_check_mode
+  check_mode: yes
+
+- name: ensure changes are done to given hosts
+  assert:
+    that:
+        - all_hosts_result_check_mode.changed