nsxt_ip_pools not idempotent

[simplygeekuk]

The nsxt_ip_pools module always updates the resource, even when nothing has been changed. The message "ip pool with pool id a7b7d048-87f5-4848-a585-c2ffe618f9df updated." is displayed on every execution.

changed: [sg1-nsx002] => {
"body": "{u'subnets': [{u'cidr': u'10.1.111.0/24', u'dns_nameservers': [], u'allocation_ranges': [{u'start': u'10.1.111.10', u'end': u'10.1.111.20'}]}], u'_system_owned': False, u'display_name': u'SiteA-CMP-VxLAN', u'_create_user': u'admin', u'_revision': 2, u'_protection': u'NOT_PROTECTED', u'_create_time': 1553353847871, u'_last_modified_time': 1553354083398, u'_last_modified_user': u'admin', u'id': u'a7b7d048-87f5-4848-a585-c2ffe618f9df', u'resource_type': u'IpPool'}",
"changed": true,
"id": "a7b7d048-87f5-4848-a585-c2ffe618f9df",
"invocation": {
"module_args": {
"display_name": "SiteA-CMP-VxLAN",
"hostname": "sg1-nsx002.sgroot.local",
"password": "VALUE_SPECIFIED_IN_NO_LOG_PARAMETER",
"port": 443,
"state": "present",
"subnets": [
{
"allocation_ranges": [
{
"end": "10.1.111.20",
"start": "10.1.111.10"
}
],
"cidr": "10.1.111.0/24"
}
],
"tags": null,
"username": "admin",
"validate_certs": false
}
},
"message": "ip pool with pool id a7b7d048-87f5-4848-a585-c2ffe618f9df updated."
}

[laidbackware]

This is because the comparison does not take into account bland DNS entries which the API server always return on a get, even if DNS was not configured.
A short term workaround is to set DNS servers on the IP pool.