Backend service support for internet NEG backend (#3782) (#260)

* Add ability to set global network endpoint group as backend for backend service. Make health_checks optional

* PR fixes

* Add encoder to remove max_utilization when neg backend

* Check for global NEG in group to remove max_utilization

* Add another nil check

* Spacing

* Docs fix

Signed-off-by: Modular Magician <magic-modules@google.com>

plugins/modules/gcp_compute_backend_service.py

@@ -372,12 +372,13 @@ options:
   health_checks:
     description:
     - The set of URLs to the HttpHealthCheck or HttpsHealthCheck resource for health
-      checking this BackendService. Currently at most one health check can be specified,
+      checking this BackendService. Currently at most one health check can be specified.
-      and a health check is required.
+    - A health check must be specified unless the backend service uses an internet
+      NEG as a backend.
     - For internal load balancing, a URL to a HealthCheck resource must be specified
       instead.
     elements: str
-    required: true
+    required: false
     type: list
   iap:
     description:
@@ -1030,8 +1031,9 @@ enableCDN:
 healthChecks:
   description:
   - The set of URLs to the HttpHealthCheck or HttpsHealthCheck resource for health
-    checking this BackendService. Currently at most one health check can be specified,
+    checking this BackendService. Currently at most one health check can be specified.
-    and a health check is required.
+  - A health check must be specified unless the backend service uses an internet NEG
+    as a backend.
   - For internal load balancing, a URL to a HealthCheck resource must be specified
     instead.
   returned: success
@@ -1365,7 +1367,7 @@ def main():
             custom_request_headers=dict(type='list', elements='str'),
             description=dict(type='str'),
             enable_cdn=dict(type='bool'),
-            health_checks=dict(required=True, type='list', elements='str'),
+            health_checks=dict(type='list', elements='str'),
             iap=dict(
                 type='dict',
                 options=dict(enabled=dict(type='bool'), oauth2_client_id=dict(required=True, type='str'), oauth2_client_secret=dict(required=True, type='str')),

plugins/modules/gcp_compute_backend_service_info.py

@@ -426,8 +426,9 @@ resources:
     healthChecks:
       description:
       - The set of URLs to the HttpHealthCheck or HttpsHealthCheck resource for health
-        checking this BackendService. Currently at most one health check can be specified,
+        checking this BackendService. Currently at most one health check can be specified.
-        and a health check is required.
+      - A health check must be specified unless the backend service uses an internet
+        NEG as a backend.
       - For internal load balancing, a URL to a HealthCheck resource must be specified
         instead.
       returned: success