/**
* @param string $instanceId The ID of a running instance to terminate
*/
protected function terminateAnInstance($instanceId)
{
self::log('Terminate the instance.');
$this->client->getCommand('TerminateInstances', array('InstanceIds' => array($instanceId)))->execute();
self::log('Wait until the instance is terminated.');
$this->client->waitUntilInstanceTerminated(array('InstanceIds' => array($instanceId)));
}
