fix: Invalid "seedfrom" in NoCloud system configuration

cloudinit/sources/DataSourceNoCloud.py

@@ -453,7 +453,7 @@ def ds_detect(self):
         elif (
             self.sys_cfg.get("datasource", {})
             .get("NoCloud", {})
-            .key("seedfrom")
+            .get("seedfrom")
         ):
             LOG.debug(
                 "Machine is configured by system configuration to run on "

tests/unittests/sources/test_nocloud.py

@@ -8,7 +8,10 @@
 
 from cloudinit import helpers
 from cloudinit.sources.DataSourceNoCloud import DataSourceNoCloud as dsNoCloud
-from cloudinit.sources.DataSourceNoCloud import parse_cmdline_data
+from cloudinit.sources.DataSourceNoCloud import (
+    DataSourceNoCloudNet,
+    parse_cmdline_data,
+)
 from tests.unittests.helpers import mock, populate_dir
 
 
@@ -87,13 +90,18 @@ def test_nocloud_seed_dir_non_lxd_platform_is_nocloud(self, mocker, paths):
         assert dsrc.platform_type == "nocloud"
         assert dsrc.subplatform == "seed-dir (%s)" % seed_dir
 
-    def test_nocloud_seedfrom(self, paths):
+    def test_nocloud_seedfrom(self, paths, caplog):
         """Check that a seedfrom triggers detection"""
-        assert dsNoCloud(
+        ds = DataSourceNoCloudNet(
             sys_cfg={"datasource": {"NoCloud": {"seedfrom": "somevalue"}}},
             distro=None,
             paths=paths,
-        ).ds_detect()
+        )
+        assert ds.ds_detect()
+        assert (
+            "Machine is configured by system configuration to run on "
+            "single datasource DataSourceNoCloudNet"
+        ) in caplog.text
 
     def test_nocloud_user_data_meta_data(self, paths):
         """Check that meta-data and user-data trigger detection"""