chore(net): log when klibc is parsed

cloudinit/net/cmdline.py

@@ -63,9 +63,14 @@ def __init__(self, _files=None, _mac_addrs=None, _cmdline=None):
                     self._mac_addrs[k] = mac_addr
 
     def is_applicable(self) -> bool:
-        """
-        Return whether this system has klibc initramfs network config or not
+        """Return whether this system has klibc initramfs network config."""
+
+        if is_applicable := self._is_applicable():
+            LOG.debug("Using initramfs network config from klibc")
+        return is_applicable
 
+    def _is_applicable(self) -> bool:
+        """
         Will return True if:
             (a) klibc files exist in /run, AND
             (b) either:

cloudinit/sources/DataSourceOracle.py

@@ -63,8 +63,8 @@ class KlibcOracleNetworkConfigSource(cmdline.KlibcNetworkConfigSource):
     `/run/initramfs/open-iscsi.interface` does not exist.
     """
 
-    def is_applicable(self) -> bool:
-        """Override is_applicable"""
+    def _is_applicable(self) -> bool:
+        """Override _is_applicable"""
         return bool(self._files)