/**
* Request spot instance(s)
*
* @param $region Region in which to fire up the instance
* @param $price maximum price to pay for spot instance
* @param $opts EC2 options
* @return CFResponse
*/
public function requestSpotInstances($region, $price, $opts)
{
$ec2 = new AmazonEC2();
$ec2->set_region($region);
$response = $ec2->request_spot_instances($price, $opts);
return $response;
}
function EC2_ScaleUp($location, $ec2Config)
{
$instancesNeeded = 0;
$file = @fopen("./ec2/testers.{$location}.dat", 'c+');
if ($file) {
if (flock($file, LOCK_EX)) {
$config = parse_ini_file('./settings/ec2.ini', true);
if (isset($config[$ec2Config])) {
// see how many tests are currently pending for the given location
$locations = parse_ini_file('./settings/locations.ini', true);
BuildLocations($locations);
if (strlen($locations[$location]['localDir'])) {
$files = glob($locations[$location]['localDir'] . '/*.*', GLOB_NOSORT);
$backlog = count($files);
$instances = json_decode(stream_get_contents($file), true);
if (!$instances) {
$instances = array();
}
$count = count($instances);
if ($backlog > 0 && !$count) {
$instancesNeeded = 1;
} else {
$ratio = $config[$ec2Config]['ratio'];
$max = $config[$ec2Config]['max'];
if ($ratio && $count < $max) {
$needed = (int) ($backlog / $ratio);
$needed = min($needed, $max);
$needed = max($needed, $count);
$instancesNeeded = $needed - $count;
}
}
}
}
if ($instancesNeeded) {
$price = trim($config[$ec2Config]['price']);
$ami = trim($config[$ec2Config]['ami']);
$region = trim($config[$ec2Config]['region']);
$size = 'm1.small';
if (strlen($config[$ec2Config]['size'])) {
$size = trim($config[$ec2Config]['size']);
}
$userData = trim($config[$ec2Config]['user_data']);
if (strlen($price) && strlen($ami) && strlen($region) && strlen($size) && strlen($userData)) {
require_once './ec2/sdk.class.php';
$ec2 = new AmazonEC2($config[$ec2Config]['key'], $config[$ec2Config]['secret']);
if ($ec2) {
$ec2->set_region($region);
$response = $ec2->request_spot_instances($price, array('InstanceCount' => (int) $instancesNeeded, 'Type' => 'one-time', 'LaunchSpecification' => array('ImageId' => $ami, 'InstanceType' => 'm1.small', 'UserData' => base64_encode($userData))));
if ($response->isOK()) {
// add empty instances to our list, the actual ID's will be filled in as they come online
// and checked periodically
for ($i = 0; $i < $instancesNeeded; $i++) {
$instances[] = array();
}
fseek($file, 0);
ftruncate($file, 0);
fwrite($file, json_encode($instances));
}
}
}
}
flock($file, LOCK_UN);
}
fclose($file);
}
}
