AWS ec2_vpc_net: Enable ipv6 CIDR assignment (ansible#60983)

* AWS ec2_vpc_net: Enable ipv6 CIDR assignment

Enable IPv6 CIDRs in ec2_vpc_net, and fix ec2_vpc_subnet tests that
were depending on the aws cli for CIDR assignment.

Related to: ansible#27800

changelogs/fragments/27800-ec2_vpc_net-ipv6-support.yml

@@ -0,0 +1,2 @@
+minor_changes:
+  - ec2_vpc_net - Enable IPv6 CIDR assignment 

lib/ansible/modules/cloud/amazon/ec2_vpc_net.py

@@ -31,6 +31,13 @@
       - The primary CIDR of the VPC. After 2.5 a list of CIDRs can be provided. The first in the list will be used as the primary CIDR
         and is used in conjunction with the C(name) to ensure idempotence.
     required: yes
+  ipv6_cidr:
+    description:
+      - Request an Amazon-provided IPv6 CIDR block with /56 prefix length.  You cannot specify the range of IPv6 addresses,
+        or the size of the CIDR block.
+    default: False
+    type: bool
+    version_added: '2.10'
   purge_cidrs:
     description:
       - Remove CIDRs that are associated with the VPC and are not specified in C(cidr_block).
@@ -91,6 +98,14 @@
       module: ec2_vpc_net
       this: works
     tenancy: dedicated
+
+- name: create a VPC with dedicated tenancy and request an IPv6 CIDR
+  ec2_vpc_net:
+    name: Module_dev2
+    cidr_block: 10.10.0.0/16
+    ipv6_cidr: True
+    region: us-east-1
+    tenancy: dedicated
 '''
 
 RETURN = '''
@@ -138,6 +153,20 @@
       returned: always
       type: str
       sample: default
+    ipv6_cidr_block_association_set:
+      description: IPv6 CIDR blocks associated with the VPC
+      returned: success
+      type: list
+      sample:
+        "ipv6_cidr_block_association_set": [
+            {
+                "association_id": "vpc-cidr-assoc-97aeeefd",
+                "ipv6_cidr_block": "2001:db8::/56",
+                "ipv6_cidr_block_state": {
+                    "state": "associated"
+                }
+            }
+        ]
     is_default:
       description: indicates whether this is the default VPC
       returned: always
@@ -337,6 +366,7 @@ def main():
     argument_spec = dict(
         name=dict(required=True),
         cidr_block=dict(type='list', required=True),
+        ipv6_cidr=dict(type='bool', default=False),
         tenancy=dict(choices=['default', 'dedicated'], default='default'),
         dns_support=dict(type='bool', default=True),
         dns_hostnames=dict(type='bool', default=True),
@@ -354,6 +384,7 @@ def main():
 
     name = module.params.get('name')
     cidr_block = get_cidr_network_bits(module, module.params.get('cidr_block'))
+    ipv6_cidr = module.params.get('ipv6_cidr')
     purge_cidrs = module.params.get('purge_cidrs')
     tenancy = module.params.get('tenancy')
     dns_support = module.params.get('dns_support')
@@ -395,7 +426,21 @@ def main():
         if len(cidr_block) > 1:
             for cidr in to_add:
                 changed = True
-                connection.associate_vpc_cidr_block(CidrBlock=cidr, VpcId=vpc_id)
+                try:
+                    connection.associate_vpc_cidr_block(CidrBlock=cidr, VpcId=vpc_id)
+                except (botocore.exceptions.ClientError, botocore.exceptions.BotoCoreError) as e:
+                    module.fail_json_aws(e, "Unable to associate CIDR {0}.".format(ipv6_cidr))
+        if ipv6_cidr:
+            if 'Ipv6CidrBlockAssociationSet' in vpc_obj.keys():
+                module.warn("Only one IPv6 CIDR is permitted per VPC, {0} already has CIDR {1}".format(
+                    vpc_id,
+                    vpc_obj['Ipv6CidrBlockAssociationSet'][0]['Ipv6CidrBlock']))
+            else:
+                try:
+                    connection.associate_vpc_cidr_block(AmazonProvidedIpv6CidrBlock=ipv6_cidr, VpcId=vpc_id)
+                    changed = True
+                except (botocore.exceptions.ClientError, botocore.exceptions.BotoCoreError) as e:
+                    module.fail_json_aws(e, "Unable to associate CIDR {0}.".format(ipv6_cidr))
 
         if purge_cidrs:
             for association_id in to_remove:

test/integration/targets/ec2_vpc_net/tasks/main.yml

@@ -63,6 +63,7 @@
     - name: create a VPC
       ec2_vpc_net:
         cidr_block: 20.0.0.0/24
+        ipv6_cidr: True
         name: "{{ resource_prefix }}"
         state: present
         <<: *aws_connection_info
@@ -78,6 +79,7 @@
       assert:
         that:
           - '"cidr_block" in result.vpc'
+          - '"ipv6_cidr_block_association_set" in result.vpc'
           - '"classic_link_enabled" in result.vpc'
           - '"dhcp_options_id" in result.vpc'
           - '"id" in result.vpc'
@@ -86,19 +88,39 @@
           - '"state" in result.vpc'
           - '"tags" in result.vpc'
 
-    - name: set the first VPC as a fact for comparison and cleanup
+    - name: set the first VPC's details as facts for comparison and cleanup
       set_fact:
         vpc_1: "{{ result.vpc.id }}"
+        vpc_1_ipv6_cidr: "{{ result.vpc.ipv6_cidr_block_association_set.0.ipv6_cidr_block }}"
 
     - name: save default dhcp_options_id for later comparison
       set_fact:
         default_dhcp_options_id: "{{ result.vpc.dhcp_options_id }}"
 
     # ============================================================
 
+    - name: Try to add IPv6 CIDR when one already exists
+      ec2_vpc_net:
+        cidr_block: 20.0.0.0/24
+        ipv6_cidr: True
+        name: "{{ resource_prefix }}"
+        state: present
+        multi_ok: no
+        <<: *aws_connection_info
+      register: result
+
+    - name: Assert no changes made
+      assert:
+        that:
+          - '"Only one IPv6 CIDR is permitted per VPC, {{ result.vpc.id }} already has CIDR {{ vpc_1_ipv6_cidr }}" in result.warnings'
+          - 'not result.changed'
+
+    # ============================================================
+
     - name: test check mode creating an identical VPC
       ec2_vpc_net:
         cidr_block: 20.0.0.0/24
+        ipv6_cidr: True
         name: "{{ resource_prefix }}"
         state: present
         multi_ok: yes
@@ -117,6 +139,7 @@
       ec2_vpc_net:
         cidr_block: 20.0.0.0/24
         name: "{{ resource_prefix }}"
+        ipv6_cidr: True
         tenancy: dedicated
         state: present
         multi_ok: yes
@@ -136,6 +159,7 @@
     - name: attempt to create another VPC with the same CIDR and name without multi_ok
       ec2_vpc_net:
         cidr_block: 20.0.0.0/24
+        ipv6_cidr: True
         name: "{{ resource_prefix }}"
         state: present
         multi_ok: no

test/integration/targets/ec2_vpc_subnet/tasks/main.yml

@@ -21,11 +21,15 @@
         name: "{{ resource_prefix }}-vpc"
         state: present
         cidr_block: "10.232.232.128/26"
+        ipv6_cidr: True
         tags:
           Name: "{{ resource_prefix }}-vpc"
           Description: "Created by ansible-test"
       register: vpc_result
 
+    - set_fact:
+        vpc_ipv6_cidr: "{{ vpc_result.vpc.ipv6_cidr_block_association_set[0].ipv6_cidr_block }}"
+
     # ============================================================
     - name: create subnet (expected changed=true) (CHECK MODE)
       ec2_vpc_subnet:
@@ -371,35 +375,6 @@
         that:
            - result is changed
 
-    # ============================================================
-    # FIXME - Replace by creating IPv6 enabled VPC once ec2_vpc_net module supports it.
-    # See Also https://github.com/ansible/ansible/pull/60983
-    - name:
-      set_fact:
-        aws_connection_env:
-          AWS_ACCESS_KEY_ID:     "{{ aws_access_key }}"
-          AWS_SECRET_ACCESS_KEY: "{{ aws_secret_key }}"
-          AWS_SESSION_TOKEN:     "{{ security_token | default(omit) }}"
-          AWS_DEFAULT_REGION:    "{{ aws_region }}"
-      no_log: yes
-
-    - name: install aws cli - FIXME temporary this should go for a lighterweight solution
-      command: pip install awscli
-
-    - name: Assign an Amazon provided IPv6 CIDR block to the VPC
-      command: aws ec2 associate-vpc-cidr-block --amazon-provided-ipv6-cidr-block --vpc-id '{{ vpc_result.vpc.id }}'
-      environment: '{{ aws_connection_env }}'
-
-    - name: wait for the IPv6 CIDR to be assigned
-      command: sleep 5
-
-    - name: Get the assigned IPv6 CIDR
-      command: aws ec2 describe-vpcs --vpc-ids '{{ vpc_result.vpc.id }}'
-      environment: '{{ aws_connection_env }}'
-      register: vpc_ipv6
-
-    - set_fact:
-        vpc_ipv6_cidr: "{{ vpc_ipv6.stdout | from_json | json_query('Vpcs[0].Ipv6CidrBlockAssociationSet[0].Ipv6CidrBlock') }}"
 
     # ============================================================
     - name: create subnet with IPv6 (expected changed=true) (CHECK MODE)