VMware: Updates the DRS rule without deletion (#57119)

* The DRS rule will be updated if any changes in the configuration without deleting the existing rule.
The rule itself is updated by the given configuration.
* Lint errors fixed
* VMware: update vmware_vm_vm_drs_rule testcases

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

@@ -62,7 +62,7 @@ options:
   state:
     description:
     - If set to C(present), then the DRS rule is created if not present.
-    - If set to C(present), then the DRS rule is deleted and created if present already.
+    - If set to C(present), then the DRS rule is already present, it updates to the given configurations.
     - If set to C(absent), then the DRS rule is deleted if present.
     required: False
     default: present
@@ -94,11 +94,11 @@ EXAMPLES = r'''
     password: "{{ esxi_password }}"
     cluster_name: "{{ cluster_name }}"
     validate_certs: no
+    enabled: True
     vms:
         - vm1
         - vm2
     drs_rule_name: vm1-vm2-affinity-rule-001
-    enabled: True
     mandatory: True
     affinity_rule: False
   delegate_to: localhost
@@ -169,7 +169,7 @@ class VmwareDrs(PyVmomi):
     # Getter
     def get_all_vms_info(self, vms_list=None):
         """
-        Function to get all VM objects using name from given cluster
+        Get all VM objects using name from given cluster
         Args:
             vms_list: List of VM names
 
@@ -192,7 +192,7 @@ class VmwareDrs(PyVmomi):
 
     def get_rule_key_by_name(self, cluster_obj=None, rule_name=None):
         """
-        Function to get a specific DRS rule key by name
+        Get a specific DRS rule key by name
         Args:
             rule_name: Name of rule
             cluster_obj: Cluster managed object
@@ -213,7 +213,7 @@ class VmwareDrs(PyVmomi):
     @staticmethod
     def normalize_rule_spec(rule_obj=None):
         """
-        Function to return human readable rule spec
+        Return human readable rule spec
         Args:
             rule_obj: Rule managed object
 
@@ -234,29 +234,26 @@ class VmwareDrs(PyVmomi):
     # Create
     def create(self):
         """
-        Function to create a DRS rule if rule does not exist
+        Create a DRS rule if rule does not exist
         """
         rule_obj = self.get_rule_key_by_name(rule_name=self.rule_name)
         if rule_obj is not None:
-            # Rule already exists, remove and create again
-            # Cluster does not allow editing existing rule
             existing_rule = self.normalize_rule_spec(rule_obj=rule_obj)
             if ((sorted(existing_rule['rule_vms']) == sorted(self.vm_list)) and
                     (existing_rule['rule_enabled'] == self.enabled) and
                     (existing_rule['rule_mandatory'] == self.mandatory) and
                     (existing_rule['rule_affinity'] == self.affinity_rule)):
-                # Rule is same as existing rule, evacuate
-                self.module.exit_json(changed=False, result=existing_rule)
-            # Delete existing rule as we cannot edit it
-            changed, result = self.delete(rule_name=self.rule_name)
-            if not changed:
-                self.module.fail_json(msg="Failed to delete while updating rule %s due to %s" % (self.rule_name, result))
-        changed, result = self.create_rule_spec()
-        return changed, result
+                self.module.exit_json(changed=False, result=existing_rule, msg="Rule already exists with the same configuration")
+            else:
+                changed, result = self.update_rule_spec(rule_obj)
+                return changed, result
+        else:
+            changed, result = self.create_rule_spec()
+            return changed, result
 
     def create_rule_spec(self):
         """
-        Function to create DRS rule
+        Create DRS rule
         """
         changed = False
         if self.affinity_rule:
@@ -286,10 +283,41 @@ class VmwareDrs(PyVmomi):
 
         return changed, result
 
+    def update_rule_spec(self, rule_obj=None):
+        """
+        Update DRS rule
+        """
+        changed = False
+
+        rule_obj.vm = self.vm_obj_list
+
+        if (rule_obj.mandatory != self.mandatory):
+            rule_obj.mandatory = self.mandatory
+
+        if (rule_obj.enabled != self.enabled):
+            rule_obj.enabled = self.enabled
+
+        rule_spec = vim.cluster.RuleSpec(info=rule_obj, operation='edit')
+        config_spec = vim.cluster.ConfigSpec(rulesSpec=[rule_spec])
+
+        try:
+            task = self.cluster_obj.ReconfigureCluster_Task(config_spec, modify=True)
+            changed, result = wait_for_task(task)
+        except vmodl.fault.InvalidRequest as e:
+            result = to_native(e.msg)
+        except Exception as e:
+            result = to_native(e)
+
+        if changed:
+            rule_obj = self.get_rule_key_by_name(rule_name=self.rule_name)
+            result = self.normalize_rule_spec(rule_obj)
+
+        return changed, result
+
     # Delete
     def delete(self, rule_name=None):
         """
-        Function to delete DRS rule using name
+        Delete DRS rule using name
         """
         changed = False
         if rule_name is None:
@@ -326,7 +354,7 @@ def main():
     )
 
     required_if = [
-        ['state', 'present', ['vms']],
+        ['state', 'present', ['vms']]
     ]
     module = AnsibleModule(argument_spec=argument_spec,
                            required_if=required_if,
@@ -347,7 +375,6 @@ def main():
         else:
             results['failed'] = True
             results['msg'] = "Failed to create DRS rule %s" % vm_drs.rule_name
-
         results['result'] = result
     elif state == 'absent':
         # Delete Rule

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

@@ -11,7 +11,9 @@
         setup_attach_host: true
         setup_datastore: true
         setup_virtualmachines: true
-    - name: Create a DRS Affinity rule for vms
+
+    - &create_drs_rule
+      name: Create a DRS Affinity rule for vms
       vmware_vm_vm_drs_rule:
         validate_certs: False
         hostname: "{{ vcenter_hostname }}"
@@ -24,12 +26,24 @@
         affinity_rule: True
         mandatory: True
       register: drs_rule_0001_results
+
     - debug: var=drs_rule_0001_results
-    - assert:
+
+    - name: Check if changes are made
+      assert:
         that:
-            - "{{ drs_rule_0001_results.changed }}"
+          - drs_rule_0001_results.changed
+
+    - <<: *create_drs_rule
+      name: Create a DRS Affinity rule for vms again
 
-    - name: Create a DRS Anti-Affinity rule for vms
+    - name: Check if no changes are made if drs rule is created again
+      assert:
+        that:
+          - not drs_rule_0001_results.changed
+
+    - &update_drs_rule
+      name: Update a DRS Affinity rule for vms
       vmware_vm_vm_drs_rule:
         validate_certs: False
         hostname: "{{ vcenter_hostname }}"
@@ -37,12 +51,94 @@
         password: "{{ vcenter_password }}"
         drs_rule_name: drs_rule_0001
         cluster_name: "{{ ccr1 }}"
-        vms: "{{ virtual_machines | map(attribute='name') | list }}"
+        vms: "{{ virtual_machines_in_cluster | map(attribute='name') | list }}"
         enabled: False
+        affinity_rule: True
+        mandatory: False
+      register: drs_rule_0001_results
+
+    - name: Check if changes are made if drs rule is created
+      assert:
+        that:
+            - drs_rule_0001_results.changed
+
+    - <<: *update_drs_rule
+      name: Update a DRS Affinity rule for vms again
+
+    - name: Check if no changes are made if drs rule is created again
+      assert:
+        that:
+            - not drs_rule_0001_results.changed
+
+    - &delete_drs_rule
+      name: Delete a DRS Affinity rule for vms
+      vmware_vm_vm_drs_rule:
+        validate_certs: False
+        hostname: "{{ vcenter_hostname }}"
+        username: "{{ vcenter_username }}"
+        password: "{{ vcenter_password }}"
+        drs_rule_name: drs_rule_0001
+        cluster_name: "{{ ccr1 }}"
+        state: absent
+      register: drs_rule_0001_results
+
+    - name: Check if DRS rule is delete
+      assert:
+        that:
+            - drs_rule_0001_results.changed
+
+    - <<: *delete_drs_rule
+      name: Delete a DRS Affinity rule for vms again
+
+    - name: Check if DRS rule is not delete again
+      assert:
+        that:
+            - not drs_rule_0001_results.changed
+
+    - &create_anti_drs_rule
+      name: Create a DRS Anti-Affinity rule for vms
+      vmware_vm_vm_drs_rule:
+        validate_certs: False
+        hostname: "{{ vcenter_hostname }}"
+        username: "{{ vcenter_username }}"
+        password: "{{ vcenter_password }}"
+        drs_rule_name: drs_rule_0002
+        cluster_name: "{{ ccr1 }}"
+        vms: "{{ virtual_machines_in_cluster | map(attribute='name') | list }}"
+        enabled: True
         affinity_rule: False
         mandatory: False
       register: drs_rule_0002_results
+
     - debug: var=drs_rule_0002_results
-    - assert:
+
+    - name: Check if DRS Anti-Affinity rule is created
+      assert:
+        that:
+            - drs_rule_0002_results.changed
+
+    - <<: *create_anti_drs_rule
+      name: Create a DRS Anti-Affinity rule for vms again
+
+    - debug: var=drs_rule_0002_results
+
+    - name: Check if no changes are made if DRS Anti-Affinity rule is created again
+      assert:
+        that:
+            - not drs_rule_0002_results.changed
+
+    - name: Delete a DRS Anti-Affinity rule for vms
+      vmware_vm_vm_drs_rule:
+        validate_certs: False
+        hostname: "{{ vcenter_hostname }}"
+        username: "{{ vcenter_username }}"
+        password: "{{ vcenter_password }}"
+        drs_rule_name: drs_rule_0002
+        cluster_name: "{{ ccr1 }}"
+        state: absent
+      register: drs_rule_0002_results
+
+    - name: Check if DRS rule is not delete
+      assert:
         that:
-            - "{{ drs_rule_0002_results.changed }}"
+            - drs_rule_0002_results.changed