register: add NICs' IPaddress to MachineInventories annotations

The IP address information can be useful to admins and users.
Anyway, the reason to this change is to later introduce support to the
CATTLE_ADDRESS and the CATTLE_INTERNAL_ADDRESS env variables.

Signed-off-by: Francesco Giudici <francesco.giudici@suse.com>

pkg/register/register.go

@@ -325,6 +325,11 @@ func sendAnnotations(conn *websocket.Conn, reg elementalv1.Registration) error {
 		log.Debugf("sending local IP: %s", data["registration-ip"])
 	}
 
+	netIfaces := hostinfo.GetIPAddresses()
+	for ifName, ipAddr := range netIfaces {
+		data["net."+ifName+".ip"] = ipAddr
+	}
+
 	err := SendJSONData(conn, MsgAnnotations, data)
 	if err != nil {
 		log.Debugf("annotation data:\n%s", litter.Sdump(data))