fix: Add check if the data source supports IPv6 when perform dhcp

cloudinit/sources/DataSourceEc2.py

@@ -15,6 +15,7 @@
 import uuid
 from contextlib import suppress
 from typing import Dict, List
+from urllib.parse import urlparse
 
 from cloudinit import dmi, net, sources
 from cloudinit import url_helper as uhelp
@@ -158,7 +159,7 @@ def _get_data(self):
                     self.distro,
                     self.distro.fallback_interface,
                     ipv4=True,
-                    ipv6=True,
+                    ipv6=any([net.is_ipv6_address(urlparse(url).netloc.strip("[]")) for url in self.metadata_urls]),
                 ) as netw:
                     self._crawled_metadata = self.crawl_metadata()
                     LOG.debug(