ldap_netdb: Return error if no hosts found

roles/ldap_netdb/files/netdb-update.py

@@ -121,7 +121,9 @@ def main(verbose):
         sys.argv[0].split("/")[-1], logoption=syslog.LOG_PID, facility=syslog.LOG_DAEMON
     )
     (conn, basedn) = ldap_connect()
+    count = 0
     for (hostname, mtime) in get_hostlist():
+        count = count + 1
         if hostname in ("localhost"):
             continue
         dn = f"cn={hostname},ou=Hosts,{basedn}"
@@ -161,6 +163,8 @@ def main(verbose):
             syslog.syslog(syslog.LOG_INFO, f"Adding netdb data for host '{dn}'")
             if not conn.add(dn, attributes=ldap_data):
                 print(dn, conn.result)
+    if count == 0:
+        print("ERR: No hosts found")
     syslog.closelog()