ec2_vpc_igw: fix 'NoneType' object is not subscriptable (#691) (#698)

ec2_vpc_igw: fix 'NoneType' object is not subscriptable (#691)

Manual backport to stable-2: ec2_vpc_igw: fix 'NoneType' object is not subscriptable
SUMMARY
Add "InternetGatewayAttached" waiter
Fixes #647
ISSUE TYPE
Bugfix Pull Request
COMPONENT NAME
ec2_vpc_igw
Reviewed-by: Alina Buzachis 
Reviewed-by: Joseph Torcasso 
Reviewed-by: Jill R 
Reviewed-by: Abhijeet Kasurde 
(cherry picked from commit 8cc9397)
SUMMARY


ISSUE TYPE


Bugfix Pull Request
Docs Pull Request
Feature Pull Request
New Module Pull Request

COMPONENT NAME

ADDITIONAL INFORMATION

changelogs/fragments/691-ec2_vpc_igw-fix-null-igw-error.yml

@@ -0,0 +1,2 @@
+bugfixes:
+  - ec2_vpc_igw - fix 'NoneType' object is not subscriptable error (https://github.com/ansible-collections/amazon.aws/pull/691).

plugins/module_utils/waiters.py

@@ -54,6 +54,24 @@
                 },
             ]
         },
+        "InternetGatewayAttached": {
+            "operation": "DescribeInternetGateways",
+            "delay": 5,
+            "maxAttempts": 40,
+            "acceptors": [
+                {
+                    "expected": "available",
+                    "matcher": "pathAll",
+                    "state": "success",
+                    "argument": "InternetGateways[].Attachments[].State"
+                },
+                {
+                    "matcher": "error",
+                    "expected": "InvalidInternetGatewayID.NotFound",
+                    "state": "retry"
+                },
+            ]
+        },
         "NetworkInterfaceAttached": {
             "operation": "DescribeNetworkInterfaces",
             "delay": 5,
@@ -716,6 +734,12 @@ def route53_model(name):
         core_waiter.NormalizedOperationMethod(
             ec2.describe_internet_gateways
         )),
+    ('EC2', 'internet_gateway_attached'): lambda ec2: core_waiter.Waiter(
+        'internet_gateway_attached',
+        ec2_model('InternetGatewayAttached'),
+        core_waiter.NormalizedOperationMethod(
+            ec2.describe_internet_gateways
+        )),
     ('EC2', 'network_interface_attached'): lambda ec2: core_waiter.Waiter(
         'network_interface_attached',
         ec2_model('NetworkInterfaceAttached'),

plugins/modules/ec2_vpc_igw.py

@@ -207,6 +207,11 @@ def ensure_igw_present(self, vpc_id, tags, purge_tags):
                     InternetGatewayId=igw['internet_gateway_id'],
                     VpcId=vpc_id
                 )
+
+                # Ensure the gateway is attached before proceeding
+                waiter = get_waiter(self._connection, 'internet_gateway_attached')
+                waiter.wait(InternetGatewayIds=[igw['internet_gateway_id']])
+
                 self._results['changed'] = True
             except botocore.exceptions.WaiterError as e:
                 self._module.fail_json_aws(e, msg="No Internet Gateway exists.")