What i would like to achieve is have two different SQL Server Databases, on two different servers running the same SQL Server Version( SQL Server 2008 R2 RTM - 10.50.1600.1 ) to be synched daily. Synched meaning just transferring the new data ( or even all the data ) from one of the two ("parent" database ) to the other ( "child" database ). We want the parent to force its shema as well all its data to its child.
What i have already tried
Knowing that the two machines run on windows server 2012 R2 i have already tried to implement a solution ( although i am no expert when it comes to SQL Server ) using the following tools.
- PHP v7.2
- ExeOutputforPHP ( https://www.exeoutput.com/ )
- WinSCP ( For its build in ftp methods https://winscp.net )
- Schemazen ( https://github.com/sethreno/schemazen )
So what i would do would be this :
- Read a configuration file using PHP ( server, user, pass, database, etc.. )
- When PHP would not produce any errors i would trigger the schemazen script method.
- When everything would go smooth i would trigger the winscp's ftp method to the remote Server
That would be the export Side
Now for the import Side
- I would Locate the ftp directory and using the Schemazen create method i would import the data again by reading a configuration file.
Export Side Code
$iniConfig = parse_ini_file('..\conf.ini', true);
if ($iniConfig) {
echo PHP_EOL.'Configuration file found in '.realpath('..\conf.ini').PHP_EOL;
define('EXPORT_HOST', $iniConfig['export']['host']);
define('EXPORT_DB', $iniConfig['export']['db']);
define('EXPORT_DIR', $iniConfig['export']['dir']);
define('FTP_HOST', $iniConfig['ftp']['host']);
define('FTP_PATH_TO_SAVE', $iniConfig['ftp']['path']);
define('FTP_USERNAME', $iniConfig['ftp']['user']);
define('FTP_PASS', $iniConfig['ftp']['pass']);
define('PATH_TO_SAVE', $iniConfig['ftp']['path']);
$output = [];
$return_var = 0;
$credsFlag = '';
if ($iniConfig['export']['user'] && $iniConfig['export']['pass']) {
define('EXPORT_USER', $iniConfig['export']['user']);
define('EXPORT_PASS', $iniConfig['export']['pass']);
$credsFlag = ' -u '.EXPORT_USER.' -p '.EXPORT_PASS;
} else {
echo PHP_EOL.'Please Define the Username and Password for connection to the Database!'.PHP_EOL;
die();
}
$connArray = [
'Database' => EXPORT_DB,
'UID' => EXPORT_USER,
'PWD' => EXPORT_PASS,
];
$connection = sqlsrv_connect(EXPORT_HOST, $connArray);
if (!$connection) {
echo PHP_EOL.'Could not Connect to the Database!' . PHP_EOL . 'We received the following tried to connect:' . PHP_EOL;
print_r(sqlsrv_errors());
die();
}
$query = "select table_name from information_schema.tables where table_catalog = '" . EXPORT_DB . "'";
$tables = [];
$rs = sqlsrv_query($connection, $query);
while (($rd = sqlsrv_fetch_array($rs, SQLSRV_FETCH_ASSOC)) !== false) {
if ($rd) {
array_push($tables, $rd);
}
}
sqlsrv_close($connection);
$dataTablesString = '--dataTables=';
foreach ($tables as $table) {
$dataTablesString .= $table['table_name'].',';
}
exec('scriptor\SchemaZen.exe script -s '.EXPORT_HOST.' -b '.EXPORT_DB.$credsFlag.' -d '.EXPORT_DIR.' -o '.$dataTablesString, $output, $return_var);
if (-1 === $return_var) {
$file = fopen('ftp_script.txt', 'w+');
if ($file) {
$ftpStringToWrite = 'open ftp://'.FTP_USERNAME.':'.FTP_PASS.'@'.FTP_HOST.'/'.PHP_EOL.'cd '.FTP_PATH_TO_SAVE.PHP_EOL.'put '.EXPORT_DIR.'\*'.PHP_EOL.'exit';
$writer = fwrite($file, $ftpStringToWrite);
if ($writer) {
fclose($file);
unset($output);
exec('ftp\WinSCP.com /script=ftp_script.txt', $output, $return_var);
if (0 === $return_var) {
echo PHP_EOL.'Backup Exported and Transfered via FTP.'.PHP_EOL;
}
}
}
}
}
Import Side Code
<?php
if ($iniConfig = parse_ini_file('../conf.ini', true)) {
define('IMPORT_HOST', $iniConfig['import']['host']);
define('IMPORT_DB', $iniConfig['import']['db']);
define('IMPORT_DB_AFTER', $iniConfig['settings']['databaseAfterFix']);
$credsFlags = '';
if ($iniConfig['import']['user'] && $iniConfig['import']['pass']) {
define('IMPORT_USER', $iniConfig['import']['user']);
define('IMPORT_PASS', $iniConfig['import']['pass']);
$credsFlags = ' -u '.IMPORT_USER.' -p '.IMPORT_PASS;
} else {
echo PHP_EOL.'Please Define the Username and Password for connection to the Database!'.PHP_EOL;
die();
}
$output = [];
$return_var = 0;
exec('scriptor\SchemaZen.exe create -s '.IMPORT_HOST.$credsFlags.' -o -b '.IMPORT_DB. ' -d ../../DBMigrate/'.$iniConfig['ftp']['path'].'', $output, $return_var);
foreach ($output as $message) {
echo $message.PHP_EOL;
}
if (0 !== $return_var) {
$error_log = fopen($iniConfig['settings']['errorlog'], 'a+');
if ($error_log) {
foreach ($output as $error) {
$writer = fwrite($error_log, '['.date('Y-m-d h:i:s').']'.$error.PHP_EOL);
}
$notify = mail($iniConfig['settings']['mail'], 'Import Error Encoutered!', 'Errors in Import of the Server.Please Check an error log should have been Created inside the folder /Data of the importer!');
if ($notify) {
echo PHP_EOL.'Mail sent about errors!'.PHP_EOL;
}
if ($writer) {
echo PHP_EOL.'Created Error LOg Please Check!'.PHP_EOL;
}
}
}
}
The Issue
The big issue is that i developed this testing in my local environment where i am running a different SQL Server Version, and when i tried to test in a staging environment inside the live servers i encountered the following problem https://github.com/sethreno/schemazen/issues/141
I would really appreciate any good alternative ( especially built in tools in SQL Server Managing Studio, but i would need some guidance ) , or any correction that could be applied to the Schemazen since its an open source project to correct the Issue.
