function cli_serverstop($host, $server)
 {
     if (!($etva_node = EtvaNodePeer::retrieveByIp($host))) {
         $error = array('success' => false, 'error' => $host . ' : Virt agent not found');
         return json_encode($error);
     }
     $this->request->setParameter('nid', $etva_node->getId());
     $this->request->setParameter('server', $server);
     $action = $this->getAction('server', 'jsonStop');
     $result = $action->executeJsonStop($this->request);
     return $result;
 }