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feature: Added web validation (#7474)

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* refactor: convert validations to modules to prep for gui integration

* accidentally dropped, schema update

* fix accidental output to webui

* mention discovery-wrapper.py and re-arrange.

* refine some fix statements

* rename the Config validation group to Configuration.

* fix some scrutinizer issues
remove as many local functions from validator.php as possible
move extensions from pre-check
remove duplicate timezone check
looks like there is some db schema differences between mariadb 10.1 and 10.2, investigating

* mariadb version diff take2

* Check schema version first for database.
Remove stop to go back to command line for install docs.
Add helpful link when there is no devices added to /addhost

* fix incorrect validation for empty string defaults

* Fix style

* Add additional file permissions checks

* catch exception and fail for invalid timezone
Change visuals a bit.

* add php version warning

* fix space
This commit is contained in:
Tony Murray
2017-10-26 01:56:09 -05:00
committed by Neil Lathwood
parent 383557f628
commit 51ba934e11
36 changed files with 3279 additions and 1666 deletions
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559
validate.php
View File

@@ -13,26 +13,40 @@
* the source code distribution for details.
*/
use LibreNMS\Config;
use LibreNMS\Validator;
chdir(__DIR__); // cwd to the directory containing this script
require_once 'includes/common.php';
require_once 'includes/functions.php';
require_once 'includes/dbFacile.php';
$options = getopt('m:h::');
$options = getopt('g:m:s::h::');
if (isset($options['h'])) {
echo
"\n Validate setup tool
Usage: ./validate.php [-m <module>] [-h]
Usage: ./validate.php [-g <group>] [-s] [-h]
-h This help section.
-m Any sub modules you want to run, comma separated:
- mail: this will test your email settings (uses default_mail option even if default_only is not set).
- dist-poller: this will test for the install running as a distributed poller.
-s Print the status of each group
-g Any validation groups you want to run, comma separated:
Non-default groups:
- mail: this will test your email settings (uses default_mail option even if default_only is not set)
- distributedpoller: this will test for the install running as a distributed poller
- rrdcheck: this will check to see if your rrd files are corrupt
Default groups:
- configuration: checks various config settings are correct
- database: checks the database for errors
- disk: checks for disk space and other disk related issues
- php: check that various PHP modules and functions exist
- poller: check that the poller and discovery are running properly
- programs: check that external programs exist and are executable
- updates: checks the status of git and updates
- user: check that the LibreNMS user is set properly
Example: ./validate.php -m mail.
Example: ./validate.php -g mail.
"
;
@@ -42,29 +56,13 @@ if (isset($options['h'])) {
// Buffer output
ob_start();
$precheck_complete = false;
register_shutdown_function(function () {
global $versions;
$output = ob_get_clean();
if (!isset($versions)) {
$versions = version_info();
global $precheck_complete;
if (!$precheck_complete) {
print_header(version_info());
}
@ob_end_clean();
echo <<< EOF
====================================
Component | Version
--------- | -------
LibreNMS | {$versions['local_ver']}
DB Schema | {$versions['db_schema']}
PHP | {$versions['php_ver']}
MySQL | {$versions['mysql_ver']}
RRDTool | {$versions['rrdtool_ver']}
SNMP | {$versions['netsnmp_ver']}
====================================
$output
EOF;
});
// critical config.php checks
@@ -97,21 +95,6 @@ if (!file_exists('vendor/autoload.php')) {
$pre_checks_failed = true;
}
// Check php modules we use to make sure they are loaded
$extensions = array('mysqli','pcre','curl','session','snmp','mcrypt', 'xml');
foreach ($extensions as $extension) {
if (extension_loaded($extension) == false) {
$missing_extensions[] = $extension;
}
}
if (!empty($missing_extensions)) {
print_fail("We couldn't find the following php extensions, please ensure they are installed:");
foreach ($missing_extensions as $extension) {
echo "$extension\n";
}
$pre_checks_failed = true;
}
if ($pre_checks_failed) {
exit;
}
@@ -120,486 +103,74 @@ $init_modules = array('nodb');
require 'includes/init.php';
// make sure install_dir is set correctly, or the next includes will fail
if (!file_exists($config['install_dir'].'/config.php')) {
print_fail('$config[\'install_dir\'] is not set correctly. It should probably be set to: ' . getcwd());
if (!file_exists(Config::get('install_dir').'/config.php')) {
$suggested = realpath(__DIR__ . '/../..');
print_fail('$config[\'install_dir\'] is not set correctly.', "It should probably be set to: $suggested");
exit;
}
// Check we are running this as the root user
if (function_exists('posix_getpwuid')) {
$userinfo = posix_getpwuid(posix_geteuid());
$username = $userinfo['name'];
} else {
$username = getenv('USERNAME') ?: getenv('USER'); //http://php.net/manual/en/function.get-current-user.php
}
if (!($username === 'root' || (isset($config['user']) && $username === $config['user']))) {
print_fail('You need to run this script as root' . (isset($config['user']) ? ' or '.$config['user'] : ''));
}
$validator = new Validator();
// Let's test the user configured if we have it
if (isset($config['user'])) {
$tmp_user = $config['user'];
$tmp_dir = $config['install_dir'];
$find_result = rtrim(`find $tmp_dir \! -user $tmp_user`);
if (!empty($find_result)) {
// This isn't just the log directory, let's print the list to the user
$files = array_diff(explode(PHP_EOL, $find_result), array(
"$tmp_dir/logs/error_log",
"$tmp_dir/logs/access_log",
));
if (!empty($files)) {
print_fail(
"We have found some files that are owned by a different user than $tmp_user, " .
'this will stop you updating automatically and / or rrd files being updated causing graphs to fail.',
"chown -R $tmp_user:$tmp_user {$config['install_dir']}"
);
print_list($files, "\t %s\n");
}
}
} else {
print_warn('You don\'t have $config["user"] set, this most likely needs to be set to librenms');
}
// Run test on MySQL
// Connect to MySQL
try {
dbConnect();
print_ok('Database connection successful');
// pull in the database config settings
mergedb();
require 'includes/process_config.inc.php';
$validator->ok('Database connection successful', null, 'database');
} catch (\LibreNMS\Exceptions\DatabaseConnectException $e) {
print_fail('Error connecting to your database '.$e->getMessage());
}
// pull in the database config settings
mergedb();
// Test for MySQL Strict mode
$strict_mode = dbFetchCell("SELECT @@global.sql_mode");
if (str_contains($strict_mode, 'STRICT_TRANS_TABLES')) {
//FIXME - Come back to this once other MySQL modes are fixed
//print_fail('You have MySQL STRICT_TRANS_TABLES enabled, please disable this until full support has been added: https://dev.mysql.com/doc/refman/5.0/en/sql-mode.html');
$validator->fail('Error connecting to your database. '.$e->getMessage(), null, 'database');
}
// Test for lower case table name support
$lc_mode = dbFetchCell("SELECT @@global.lower_case_table_names");
if ($lc_mode != 0) {
print_fail('You have lower_case_table_names set to 1 or true in mysql config.', 'Set lower_case_table_names=0 in your mysql config file');
}
$precheck_complete = true; // disable shutdown function
print_header($validator->getVersions());
if (empty($strict_mode) === false) {
print_fail("You have not set sql_mode='' in your mysql config");
}
// Test for correct character set and collation
$collation = dbFetchRows("SELECT DEFAULT_CHARACTER_SET_NAME, DEFAULT_COLLATION_NAME FROM information_schema.SCHEMATA S WHERE schema_name = '" . $config['db_name'] . "' AND ( DEFAULT_CHARACTER_SET_NAME != 'utf8' OR DEFAULT_COLLATION_NAME != 'utf8_unicode_ci')");
if (empty($collation) !== true) {
print_fail('MySQL Database collation is wrong: ' . implode(' ', $collation[0]), 'https://t.libren.ms/-zdwk');
}
$collation_tables = dbFetchRows("SELECT T.TABLE_NAME, C.CHARACTER_SET_NAME, C.COLLATION_NAME FROM information_schema.TABLES AS T, information_schema.COLLATION_CHARACTER_SET_APPLICABILITY AS C WHERE C.collation_name = T.table_collation AND T.table_schema = '" . $config['db_name'] . "' AND ( C.CHARACTER_SET_NAME != 'utf8' OR C.COLLATION_NAME != 'utf8_unicode_ci' );");
if (empty($collation_tables) !== true) {
print_fail('MySQL tables collation is wrong: ', 'http://bit.ly/2lAG9H8');
print_list($collation_tables, "\t %s\n");
}
$collation_columns = dbFetchRows("SELECT TABLE_NAME, COLUMN_NAME, CHARACTER_SET_NAME, COLLATION_NAME FROM information_schema.COLUMNS WHERE TABLE_SCHEMA = '" . $config['db_name'] . "' AND ( CHARACTER_SET_NAME != 'utf8' OR COLLATION_NAME != 'utf8_unicode_ci' );");
if (empty($collation_columns) !== true) {
print_fail('MySQL column collation is wrong: ', 'https://t.libren.ms/-zdwk');
print_list($collation_columns, "\t %s\n");
}
if (is_file('misc/db_schema.yaml')) {
$master_schema = Symfony\Component\Yaml\Yaml::parse(
file_get_contents('misc/db_schema.yaml')
);
$current_schema = dump_db_schema();
$schema_update = array();
foreach ((array)$master_schema as $table => $data) {
if (empty($current_schema[$table])) {
print_fail("Database: missing table ($table)");
$columns = array_map('column_schema_to_sql', $data['Columns']);
$indexes = array_map('index_schema_to_sql', $data['Indexes']);
$def = implode(', ', array_merge(array_values($columns), array_values($indexes)));
$schema_update[] = "CREATE TABLE `$table` ($def);";
} else {
$previous_column = '';
foreach ($data['Columns'] as $column => $cdata) {
$cur = $current_schema[$table]['Columns'][$column];
if ($cur['Default'] == 'current_timestamp()') {
$cur['Default'] = 'CURRENT_TIMESTAMP';
}
if ($cur['Extra'] == 'on update current_timestamp()') {
$cur['Extra'] = 'on update CURRENT_TIMESTAMP';
}
if (empty($current_schema[$table]['Columns'][$column])) {
print_fail("Database: missing column ($table/$column)");
$sql = "ALTER TABLE `$table` ADD " . column_schema_to_sql($cdata);
if (!empty($previous_column)) {
$sql .= " AFTER `$previous_column`";
}
$schema_update[] = $sql . ';';
} elseif ($cdata != $cur) {
print_fail("Database: incorrect column ($table/$column)");
$schema_update[] = "ALTER TABLE `$table` CHANGE `$column` " . column_schema_to_sql($cdata) . ';';
}
$previous_column = $column;
unset($current_schema[$table]['Columns'][$column]); // remove checked columns
}
foreach ($current_schema[$table]['Columns'] as $column => $_unused) {
print_fail("Database: extra column ($table/$column)");
$schema_update[] = "ALTER TABLE `$table` DROP `$column`;";
}
foreach ($data['Indexes'] as $name => $index) {
if (empty($current_schema[$table]['Indexes'][$name])) {
print_fail("Database: missing index ($table/$name)");
$schema_update[] = "ALTER TABLE `$table` ADD " . index_schema_to_sql($index) . ';';
} elseif ($index != $current_schema[$table]['Indexes'][$name]) {
print_fail("Database: incorrect index ($table/$name)");
$schema_update[] = "ALTER TABLE `$table` DROP INDEX `$name`, " . index_schema_to_sql($index) . ';';
}
unset($current_schema[$table]['Indexes'][$name]);
}
foreach ($current_schema[$table]['Indexes'] as $name => $_unused) {
print_fail("Database: extra index ($table/$name)");
$schema_update[] = "ALTER TABLE `$table` DROP INDEX `$name`;";
}
}
unset($current_schema[$table]); // remove checked tables
}
foreach ($current_schema as $table => $data) {
print_fail("Database: extra table ($table)");
$schema_update[] = "DROP TABLE `$table`;";
}
if (isset($options['g'])) {
$modules = explode(',', $options['g']);
} elseif (isset($options['m'])) {
$modules = explode(',', $options['m']); // backwards compat
} else {
print_warn("We haven't detected the db_schema.yaml file");
$modules = array(); // all modules
}
if (empty($schema_update)) {
print_ok('Database schema correct');
} else {
print_fail("We have detected that your database schema may be wrong, please report the following to us on IRC or the community site (https://t.libren.ms/5gscd):");
print_list($schema_update, "\t %s\n", 30);
}
$versions = version_info();
// Check that rrdtool config version is what we see
if (isset($config['rrdtool_version']) && (version_compare($config['rrdtool_version'], $versions['rrdtool_ver'], '>'))) {
print_fail('The rrdtool version you have specified is newer than what is installed.', "Either comment out \$config['rrdtool_version'] = '{$config['rrdtool_version']}'; or set \$config['rrdtool_version'] = '{$versions['rrdtool_ver']}';");
}
if (check_git_exists() === true) {
if ($config['update_channel'] == 'master') {
if ($versions['local_sha'] != $versions['github']['sha']) {
$commit_date = new DateTime('@' . $versions['local_date'], new DateTimeZone(date_default_timezone_get()));
if ($commit_date->diff(new DateTime())->days > 0) {
print_warn("Your install is over 24 hours out of date, last update: " . $commit_date->format('r'));
}
}
if ($versions['local_branch'] != 'master') {
print_warn("Your local git branch is not master, this will prevent automatic updates.");
}
}
// check for modified files
$modifiedcmd = 'git diff --name-only --exit-code';
if ($username === 'root') {
$modifiedcmd = 'su '.$config['user'].' -c "'.$modifiedcmd.'"';
}
exec($modifiedcmd, $cmdoutput, $code);
if ($code !== 0 && !empty($cmdoutput)) {
print_warn("Your local git contains modified files, this could prevent automatic updates.\nModified files:");
print_list($cmdoutput, "\t %s\n");
}
} else {
print_warn('Unable to locate git. This should probably be installed.');
}
$ini_tz = ini_get('date.timezone');
$sh_tz = rtrim(shell_exec('date +%Z'));
$php_tz = date('T');
if (empty($ini_tz)) {
print_fail(
'You have no timezone set for php.',
'http://php.net/manual/en/datetime.configuration.php#ini.date.timezone'
);
} elseif ($sh_tz !== $php_tz) {
print_fail("You have a different system timezone ($sh_tz) specified to the php configured timezone ($php_tz), please correct this.");
}
// Test transports
if ($config['alerts']['email']['enable'] === true) {
print_warn('You have the old alerting system enabled - this is to be deprecated on the 1st of June 2015: https://groups.google.com/forum/#!topic/librenms-project/1llxos4m0p4');
}
// Test rrdcached
if (!$config['rrdcached']) {
$rrd_dir = stat($config['rrd_dir']);
if ($rrd_dir[4] == 0 || $rrd_dir[5] == 0) {
print_warn('Your RRD directory is owned by root, please consider changing over to user a non-root user');
}
if (substr(sprintf('%o', fileperms($config['rrd_dir'])), -3) != 775) {
print_warn('Your RRD directory is not set to 0775', "chmod 775 {$config['rrd_dir']}");
}
}
if (isset($config['rrdcached'])) {
check_rrdcached();
}
// Disk space and permission checks
if (substr(sprintf('%o', fileperms($config['temp_dir'])), -3) != 777) {
print_warn('Your tmp directory ('.$config['temp_dir'].") is not set to 777 so graphs most likely won't be generated");
}
$space_check = (disk_free_space($config['install_dir']) / 1024 / 1024);
if ($space_check < 512 && $space_check > 1) {
print_warn('Disk space where '.$config['install_dir'].' is located is less than 512Mb');
}
if ($space_check < 1) {
print_fail('Disk space where '.$config['install_dir'].' is located is empty!!!');
}
// Check programs
$bins = array('fping','fping6','rrdtool','snmpwalk','snmpget','snmpbulkwalk');
foreach ($bins as $bin) {
$cmd = rtrim(shell_exec("which {$config[$bin]} 2>/dev/null"));
if (!$cmd) {
print_fail("$bin location is incorrect or bin not installed. \n\tYou can also manually set the path to $bin by placing the following in config.php: \n\t\$config['$bin'] = \"/path/to/$bin\";");
} elseif (in_array($bin, array('fping', 'fping6'))) {
if (trim(shell_exec("which getcap 2>/dev/null"))) {
if (!str_contains(shell_exec("getcap $cmd"), "$cmd = cap_net_raw+ep")) {
print_fail("$bin should have CAP_NET_RAW!", "setcap cap_net_raw+ep $cmd");
}
} elseif (!(fileperms($cmd) & 2048)) {
print_fail("$bin should be suid!", "chmod u+s $cmd");
}
}
}
$disabled_functions = explode(',', ini_get('disable_functions'));
$required_functions = array('exec','passthru','shell_exec','escapeshellarg','escapeshellcmd','proc_close','proc_open','popen');
foreach ($required_functions as $function) {
if (in_array($function, $disabled_functions)) {
print_fail("$function is disabled in php.ini");
}
}
if (!function_exists('openssl_random_pseudo_bytes')) {
print_warn("openssl_random_pseudo_bytes is not being used for user password hashing. This is a recommended function (https://secure.php.net/openssl_random_pseudo_bytes)");
if (!is_readable('/dev/urandom')) {
print_warn("It also looks like we can't use /dev/urandom for user password hashing. We will fall back to generating our own hash - be warned");
}
}
// check poller
if (dbFetchCell('SELECT COUNT(*) FROM `pollers`')) {
if (dbFetchCell('SELECT COUNT(*) FROM `pollers` WHERE `last_polled` >= DATE_ADD(NOW(), INTERVAL - 5 MINUTE)') == 0) {
print_fail("The poller has not run in the last 5 minutes, check the cron job");
}
} else {
print_fail('The poller has never run, check the cron job');
}
// run checks
$validator->validate($modules, isset($options['s'])||!empty($modules));
if (dbFetchCell('SELECT COUNT(*) FROM `devices`') == 0) {
print_warn("You have not added any devices yet.");
} else {
// check discovery last run
if (dbFetchCell('SELECT COUNT(*) FROM `devices` WHERE `last_discovered` IS NOT NULL') == 0) {
print_fail('Discovery has never run, check the cron job');
} elseif (dbFetchCell("SELECT COUNT(*) FROM `devices` WHERE `last_discovered` <= DATE_ADD(NOW(), INTERVAL - 24 HOUR) AND `ignore` = 0 AND `disabled` = 0 AND `status` = 1") > 0) {
print_fail("Discovery has not completed in the last 24 hours, check the cron job");
}
// check devices polling
if (count($devices = dbFetchColumn("SELECT `hostname` FROM `devices` WHERE (`last_polled` < DATE_ADD(NOW(), INTERVAL - 5 MINUTE) OR `last_polled` IS NULL) AND `ignore` = 0 AND `disabled` = 0 AND `status` = 1")) > 0) {
print_warn("Some devices have not been polled in the last 5 minutes.
You may have performance issues. Check your poll log and see: http://docs.librenms.org/Support/Performance/");
print_list($devices, "\t %s\n");
}
if (count($devices = dbFetchColumn('SELECT `hostname` FROM `devices` WHERE last_polled_timetaken > 300 AND `ignore` = 0 AND `disabled` = 0 AND `status` = 1')) > 0) {
print_fail("Some devices have not completed their polling run in 5 minutes, this will create gaps in data.
Check your poll log and refer to http://docs.librenms.org/Support/Performance/");
print_list($devices, "\t %s\n");
}
}
// Modules test
$modules = explode(',', $options['m']);
foreach ($modules as $module) {
switch ($module) {
case 'mail':
if ($config['alert']['transports']['mail'] === true) {
$run_test = 1;
if (empty($config['alert']['default_mail'])) {
print_fail('default_mail config option needs to be specified to test email');
$run_test = 0;
} elseif ($config['email_backend'] == 'sendmail') {
if (empty($config['email_sendmail_path'])) {
print_fail("You have selected sendmail but not configured email_sendmail_path");
$run_test = 0;
} elseif (!file_exists($config['email_sendmail_path'])) {
print_fail("The configured email_sendmail_path is not valid");
$run_test = 0;
}
} elseif ($config['email_backend'] == 'smtp') {
if (empty($config['email_smtp_host'])) {
print_fail('You have selected SMTP but not configured an SMTP host');
$run_test = 0;
}
if (empty($config['email_smtp_port'])) {
print_fail('You have selected SMTP but not configured an SMTP port');
$run_test = 0;
}
if (($config['email_smtp_auth'] === true) && (empty($config['email_smtp_username']) || empty($config['email_smtp_password']))) {
print_fail('You have selected SMTP auth but have not configured both username and password');
$run_test = 0;
}
}//end if
if ($run_test == 1) {
if ($err = send_mail($config['alert']['default_mail'], 'Test email', 'Testing email from NMS')) {
print_ok('Email has been sent');
} else {
print_fail('Issue sending email to '.$config['alert']['default_mail'].' with error '.$err);
}
}
}//end if
break;
case 'dist-poller':
if ($config['distributed_poller'] !== true) {
print_fail('You have not enabled distributed_poller');
} else {
if (empty($config['distributed_poller_memcached_host'])) {
print_fail('You have not configured $config[\'distributed_poller_memcached_host\']');
} elseif (empty($config['distributed_poller_memcached_port'])) {
print_fail('You have not configured $config[\'distributed_poller_memcached_port\']');
} else {
$connection = @fsockopen($config['distributed_poller_memcached_host'], $config['distributed_poller_memcached_port']);
if (!is_resource($connection)) {
print_fail('We could not get memcached stats, it is possible that we cannot connect to your memcached server, please check');
} else {
fclose($connection);
print_ok('Connection to memcached is ok');
}
}
if (empty($config['rrdcached'])) {
print_fail('You have not configured $config[\'rrdcached\']');
} elseif (empty($config['rrd_dir'])) {
print_fail('You have not configured $config[\'rrd_dir\']');
} else {
check_rrdcached();
}
}
break;
case 'rrdcheck':
// Loop through the rrd_dir
$rrd_directory = new RecursiveDirectoryIterator($config['rrd_dir']);
// Filter out any non rrd files
$rrd_directory_filter = new LibreNMS\RRDRecursiveFilterIterator($rrd_directory);
$rrd_iterator = new RecursiveIteratorIterator($rrd_directory_filter);
$rrd_total = iterator_count($rrd_iterator);
$rrd_iterator->rewind(); // Rewind iterator in case iterator_count left iterator in unknown state
echo "\nScanning ".$rrd_total." rrd files in ".$config['rrd_dir']."...\n";
// Count loops so we can push status to the user
$loopcount = 0;
$screenpad = 0;
foreach ($rrd_iterator as $filename => $file) {
$rrd_test_result = rrdtest($filename, $output, $error);
$loopcount++;
if (($loopcount % 50) == 0) {
//This lets us update the previous status update without spamming in most consoles
echo "\033[".$screenpad."D";
$test_status = 'Status: '.$loopcount.'/'.$rrd_total;
echo $test_status;
$screenpad = strlen($test_status);
}
// A non zero result means there was some kind of error
if ($rrd_test_result > 0) {
echo "\033[".$screenpad."D";
print_fail('Error parsing "'.$filename.'" RRD '.trim($error));
$screenpad = 0;
}
}
echo "\033[".$screenpad."D";
echo "Status: ".$loopcount."/".$rrd_total." - Complete\n";
break;
}//end switch
}//end foreach
// End
function print_ok($msg)
function print_header($versions)
{
c_echo("[%gOK%n] $msg\n");
}//end print_ok()
$output = ob_get_clean();
ob_end_clean();
echo <<< EOF
====================================
Component | Version
--------- | -------
LibreNMS | ${versions['local_ver']}
DB Schema | ${versions['db_schema']}
PHP | ${versions['php_ver']}
MySQL | ${versions['mysql_ver']}
RRDTool | ${versions['rrdtool_ver']}
SNMP | ${versions['netsnmp_ver']}
====================================
$output
EOF;
}
// output matches that of ValidationResult
function print_fail($msg, $fix = null)
{
c_echo("[%RFAIL%n] $msg");
if ($fix && strlen($msg) > 72) {
echo PHP_EOL . " ";
}
print_fix($fix);
}
function print_warn($msg, $fix = null)
{
c_echo("[%YWARN%n] $msg");
if ($fix && strlen($msg) > 72) {
echo PHP_EOL . " ";
}
print_fix($fix);
}
/**
* @param $fix
*/
function print_fix($fix)
{
if (!empty($fix)) {
c_echo(" [%BFIX%n] %B$fix%n");
}
echo PHP_EOL;
}
function check_rrdcached()
{
global $config;
list($host,$port) = explode(':', $config['rrdcached']);
if ($host == 'unix') {
// Using socket, check that file exists
if (!file_exists($port)) {
print_fail("$port doesn't appear to exist, rrdcached test failed");
}
} else {
$connection = @fsockopen($host, $port);
if (is_resource($connection)) {
fclose($connection);
} else {
print_fail('Cannot connect to rrdcached instance');
}
}
}//end check_rrdcached