/**
* Check if slaves fingerprint has changed
*
* @param array $slaves Array of slaves with EC2 instance ID as array key
* @param string $fileLocation Location of file storing slaves fingerprint
* @return boolean
*/
function hasSlavesChanged($slaves, $fileLocation)
{
$old = getSavedSlaves($fileLocation);
sort($old);
sort($slaves);
if ($old == $slaves) {
return false;
}
return true;
}
if (!hasSlavesChanged($slavesIDs, $APP_CONF['data_dir'] . 'slaves')) {
echo "No changes in slaves.\n";
keepLsyncdAlive($APP_CONF);
exit;
}
echo "There are changes in slaves.\n";
$toRun = null;
if (isset($APP_CONF['remote_script']['enabled']) && $APP_CONF['remote_script']['enabled']) {
$scriptConfig = $APP_CONF['remote_script'];
echo "Remote script execution is enabled.\n";
if (!is_readable($scriptConfig['local_path'])) {
trigger_error('Remote script is not present or readable at ' . $scriptConfig['local_path']);
}
$toRun = $slavesIDs;
if ($APP_CONF['remote_script']['run_script_on_all_slaves'] === false) {
$oldSlaves = getSavedSlaves($APP_CONF['data_dir'] . 'slaves');
$toRun = array_diff($slavesIDs, $oldSlaves);
}
}
saveSlaves($slavesIDs, $APP_CONF['data_dir'] . 'slaves');
$ec2Client = $aws->get('Ec2');
$ec2Instances = $ec2Client->describeInstances(array('InstanceIds' => $slavesIDs));
if (empty($ec2Instances)) {
trigger_error('Unable to obtain description of slave EC2 instances.', E_USER_ERROR);
}
$slaves = array();
foreach ($ec2Instances['Reservations'] as $reservation) {
$instances = $reservation['Instances'];
foreach ($instances as $instance) {
$slaves[] = array('instance_id' => $instance['InstanceId'], 'private_ip_address' => $instance['PrivateIpAddress']);
}
