Add check_mode support to ec2_asg

changelogs/fragments/1033-ec2_asg-check-mode-support.yml

@@ -0,0 +1,2 @@
+minor_changes:
+- ec2_asg - add check mode support (https://github.com/ansible-collections/community.aws/pull/1033).

plugins/modules/ec2_asg.py

@@ -1138,6 +1138,9 @@ def create_autoscaling_group(connection):
                                      ResourceType='auto-scaling-group',
                                      ResourceId=group_name))
     if not as_groups:
+        if module.check_mode:
+            module.exit_json(changed=True, msg="Would have created AutoScalingGroup if not in check_mode.")
+
         if not vpc_zone_identifier and not availability_zones:
             availability_zones = module.params['availability_zones'] = [zone['ZoneName'] for
                                                                         zone in ec2_connection.describe_availability_zones()['AvailabilityZones']]
@@ -1206,6 +1209,9 @@ def create_autoscaling_group(connection):
         except (botocore.exceptions.ClientError, botocore.exceptions.BotoCoreError) as e:
             module.fail_json_aws(e, msg="Failed to create Autoscaling Group.")
     else:
+        if module.check_mode:
+            module.exit_json(changed=True, msg="Would have modified AutoScalingGroup if required if not in check_mode.")
+
         as_group = as_groups[0]
         initial_asg_properties = get_properties(as_group)
         changed = False
@@ -1401,6 +1407,8 @@ def delete_autoscaling_group(connection):
         del_notification_config(connection, group_name, notification_topic)
     groups = describe_autoscaling_groups(connection, group_name)
     if groups:
+        if module.check_mode:
+            module.exit_json(changed=True, msg="Would have deleted AutoScalingGroup if not in check_mode.")
         wait_timeout = time.time() + wait_timeout
         if not wait_for_instances:
             delete_asg(connection, group_name, force_delete=True)
@@ -1456,6 +1464,7 @@ def replace(connection):
     min_size = module.params.get('min_size')
     desired_capacity = module.params.get('desired_capacity')
     launch_config_name = module.params.get('launch_config_name')
+
     # Required to maintain the default value being set to 'true'
     if launch_config_name:
         lc_check = module.params.get('lc_check')
@@ -1891,6 +1900,7 @@ def main():
     global module
     module = AnsibleAWSModule(
         argument_spec=argument_spec,
+        supports_check_mode=True,
         mutually_exclusive=[
             ['replace_all_instances', 'replace_instances'],
             ['replace_all_instances', 'detach_instances'],

tests/integration/targets/ec2_asg/roles/ec2_asg/tasks/create_update_delete.yml

@@ -60,6 +60,19 @@
         that:
           - "output.viable_instances == 1"
 
+    - name: Enable metrics collection - check_mode
+      ec2_asg:
+        name: "{{ resource_prefix }}-asg"
+        metrics_collection: yes
+      register: output
+      check_mode: true
+
+    - assert:
+        that:
+          - output is changed
+          - output is not failed
+          - '"autoscaling:UpdateAutoScalingGroup" not in output.resource_actions'
+
     - name: Enable metrics collection
       ec2_asg:
         name: "{{ resource_prefix }}-asg"
@@ -70,7 +83,7 @@
         that:
           - output is changed
 
-    - name: Enable metrics collection (check idempotency)
+    - name: Enable metrics collection (idempotency)
       ec2_asg:
         name: "{{ resource_prefix }}-asg"
         metrics_collection: yes
@@ -80,6 +93,20 @@
         that:
           - output is not changed
 
+    - name: Disable metrics collection - check_mode
+      ec2_asg:
+        name: "{{ resource_prefix }}-asg"
+        metrics_collection: no
+      register: output
+      check_mode: true
+
+    - assert:
+        that:
+          - output is changed
+          - output is not failed
+          - '"autoscaling:UpdateAutoScalingGroup" not in output.resource_actions'
+
+
     - name: Disable metrics collection
       ec2_asg:
         name: "{{ resource_prefix }}-asg"
@@ -90,7 +117,7 @@
         that:
           - output is changed
 
-    - name: Disable metrics collection (check idempotency)
+    - name: Disable metrics collection (idempotency)
       ec2_asg:
         name: "{{ resource_prefix }}-asg"
         metrics_collection: no
@@ -415,6 +442,30 @@
             groups:
               - "{{ sg.group_id }}"
 
+    - name: update autoscaling group with mixed-instances policy with mixed instances types - check_mode
+      ec2_asg:
+        name: "{{ resource_prefix }}-asg"
+        launch_template:
+          launch_template_name: "{{ resource_prefix }}-lt"
+        desired_capacity: 1
+        min_size: 1
+        max_size: 1
+        vpc_zone_identifier: "{{ testing_subnet.subnet.id }}"
+        state: present
+        mixed_instances_policy:
+          instance_types:
+            - t3.micro
+            - t2.nano
+        wait_for_instances: yes
+      register: output
+      check_mode: true
+
+    - assert:
+        that:
+          - output is changed
+          - output is not failed
+          - '"autoscaling:CreateOrUpdateTags" not in output.resource_actions'
+
     - name: update autoscaling group with mixed-instances policy with mixed instances types
       ec2_asg:
         name: "{{ resource_prefix }}-asg"

tests/integration/targets/ec2_asg/roles/ec2_asg/tasks/instance_detach.yml

@@ -18,6 +18,27 @@
           - '"autoscaling:CreateLaunchConfiguration" in create_lc.resource_actions'
 
     #----------------------------------------------------------------------
+
+    - name: create a AutoScalingGroup to be used for instance_detach test - check_mode
+      ec2_asg:
+        name: "{{ resource_prefix }}-asg-detach-test"
+        launch_config_name: "{{ resource_prefix }}-lc-detach-test"
+        health_check_period: 60
+        health_check_type: ELB
+        replace_all_instances: yes
+        min_size: 3
+        max_size: 6
+        desired_capacity: 3
+        region: "{{ aws_region }}"
+      register: create_asg
+      check_mode: true
+
+    - assert:
+        that:
+          - create_asg is changed
+          - create_asg is not failed
+          - '"autoscaling:CreateAutoScalingGroup" not in create_asg.resource_actions'
+
     - name: create a AutoScalingGroup to be used for instance_detach test
       ec2_asg:
         name: "{{ resource_prefix }}-asg-detach-test"
@@ -68,6 +89,28 @@
 
     #----------------------------------------------------------------------
 
+    - name: detach 2 instance from the asg and replace with other instances - check_mode
+      ec2_asg:
+        name: "{{ resource_prefix }}-asg-detach-test"
+        launch_config_name: "{{ resource_prefix }}-lc-detach-test"
+        health_check_period: 60
+        health_check_type: ELB
+        min_size: 3
+        max_size: 3
+        desired_capacity: 3
+        region: "{{ aws_region }}"
+        detach_instances:
+          - '{{ init_instance_1 }}'
+          - '{{ init_instance_2 }}'
+      register: detach_result
+      check_mode: true
+
+    - assert:
+        that:
+          - detach_result is changed
+          - detach_result is not failed
+          - '"autoscaling:DetachInstances" not in detach_result.resource_actions'
+
     - name: detach 2 instance from the asg and replace with other instances
       ec2_asg:
         name: "{{ resource_prefix }}-asg-detach-test"
@@ -189,6 +232,19 @@
       - "{{ instance_replace_2 }}"
       - "{{ instance_replace_3 }}"
 
+  - name: kill asg created in this test - check_mode
+    ec2_asg:
+      name: "{{ resource_prefix }}-asg-detach-test"
+      state: absent
+    register: removed
+    check_mode: true
+
+  - assert:
+      that:
+        - removed is changed
+        - removed is not failed
+        - '"autoscaling:DeleteAutoScalingGroup" not in removed.resource_actions'
+
   - name: kill asg created in this test
     ec2_asg:
       name: "{{ resource_prefix }}-asg-detach-test"
@@ -198,6 +254,19 @@
     ignore_errors: yes
     retries: 10
 
+  - name: kill asg created in this test - check_mode (idempotent)
+    ec2_asg:
+      name: "{{ resource_prefix }}-asg-detach-test"
+      state: absent
+    register: removed
+    check_mode: true
+
+  - assert:
+      that:
+        - removed is not changed
+        - removed is not failed
+        - '"autoscaling:DeleteAutoScalingGroup" not in removed.resource_actions'
+
   - name: remove launch config created in this test
     ec2_lc:
       name: "{{ resource_prefix }}-lc-detach-test"

tests/integration/targets/ec2_asg/roles/ec2_asg/tasks/tag_operations.yml

@@ -49,6 +49,23 @@
         that:
           - info_result.results[0].tags | length == 0
 
+    - name: Tag asg - check_mode
+      ec2_asg:
+        name: "{{ resource_prefix }}-asg-tag-test"
+        tags:
+        - tag_a: 'value 1'
+          propagate_at_launch: no
+        - tag_b: 'value 2'
+          propagate_at_launch: yes
+      register: output
+      check_mode: true
+
+    - assert:
+        that:
+          - output is changed
+          - output is not failed
+          - '"autoscaling:CreateOrUpdateTags" not in output.resource_actions'
+
     - name: Tag asg
       ec2_asg:
         name: "{{ resource_prefix }}-asg-tag-test"