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poller.php
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#!/usr/bin/env php
<?php
/*
+-------------------------------------------------------------------------+
| Copyright (C) 2004-2025 The Cacti Group |
| |
| This program is free software; you can redistribute it and/or |
| modify it under the terms of the GNU General Public License |
| as published by the Free Software Foundation; either version 2 |
| of the License, or (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
+-------------------------------------------------------------------------+
| Cacti: The Complete RRDtool-based Graphing Solution |
+-------------------------------------------------------------------------+
| This code is designed, written, and maintained by the Cacti Group. See |
| about.php and/or the AUTHORS file for specific developer information. |
+-------------------------------------------------------------------------+
| http://www.cacti.net/ |
+-------------------------------------------------------------------------+
*/
if (function_exists('pcntl_async_signals')) {
pcntl_async_signals(true);
} else {
declare(ticks = 100);
}
ini_set('output_buffering', 'Off');
require(__DIR__ . '/include/cli_check.php');
require_once(CACTI_PATH_LIBRARY . '/poller.php');
require_once(CACTI_PATH_LIBRARY . '/data_query.php');
require_once(CACTI_PATH_LIBRARY . '/rrd.php');
require_once(CACTI_PATH_LIBRARY . '/dsstats.php');
require_once(CACTI_PATH_LIBRARY . '/dsdebug.php');
require_once(CACTI_PATH_LIBRARY . '/boost.php');
require_once(CACTI_PATH_LIBRARY . '/reports.php');
require_once(CACTI_PATH_LIBRARY . '/rrdcheck.php');
global $poller_db_cnn_id, $remote_db_cnn_id, $logged;
if (POLLER_ID > 1 && CACTI_CONNECTION == 'online') {
$poller_db_cnn_id = $remote_db_cnn_id;
} else {
$poller_db_cnn_id = false;
}
function sig_handler($signo) {
global $poller_db_cnn_id;
switch ($signo) {
case SIGTERM:
case SIGINT:
cacti_log('WARNING: Cacti Master Poller process terminated by user', true, 'POLLER', POLLER_VERBOSITY_LOW);
$running_processes = db_fetch_assoc('SELECT ' . SQL_NO_CACHE . ' *
FROM poller_time
WHERE end_time=\'0000-00-00 00:00:00\'', true, $poller_db_cnn_id);
if (cacti_sizeof($running_processes)) {
foreach ($running_processes as $process) {
if (function_exists('posix_kill')) {
cacti_log("WARNING: Termination poller process with pid '" . $process['pid'] . "'", true, 'POLLER', POLLER_VERBOSITY_LOW);
posix_kill($process['pid'], SIGTERM);
}
}
}
db_execute('TRUNCATE TABLE poller_time', true, $poller_db_cnn_id);
exit;
break;
default:
// ignore all other signals
}
}
// initialize some variables
$force = false;
$debug = false;
$mibs = false;
$logged = false;
// set the poller_id
$poller_id = POLLER_ID;
$hostname = php_uname('n');
// requires for remote poller stage out
chdir(__DIR__);
// process calling arguments
$parms = $_SERVER['argv'];
array_shift($parms);
if (cacti_sizeof($parms)) {
foreach ($parms as $parameter) {
if (strpos($parameter, '=')) {
list($arg, $value) = explode('=', $parameter);
} else {
$arg = $parameter;
$value = '';
}
switch ($arg) {
case '-p':
case '--poller':
$poller_id = $value;
break;
case '-d':
case '--debug':
$debug = true;
break;
case '--force':
$force = true;
break;
case '--version':
case '-V':
case '-v':
display_version();
exit;
case '-H':
case '-h':
case '--help':
display_help();
exit;
default:
print "ERROR: Invalid Argument: ($arg)\n\n";
display_help();
exit(1);
}
}
}
// catch upgrade case
if (!db_column_exists('poller', 'dbhost')) {
cacti_log('Poller is upgrading from pre Cacti 1.0, exiting till upgraded.', false, 'POLLER');
exit(0);
}
$phostname = db_fetch_cell_prepared('SELECT hostname
FROM poller
WHERE id = ?',
[$poller_id], '', true, $poller_db_cnn_id);
// update the pollers hostname if it is blank, otherwise allow the user to edit it
if ($phostname == '' || $phostname == 'localhost' || $phostname == '127.0.0.1') {
db_execute_prepared('UPDATE poller
SET hostname = ?
WHERE id = ?',
[$hostname, $poller_id], true, $poller_db_cnn_id);
}
$dbhostname = db_fetch_cell_prepared('SELECT dbhost
FROM poller
WHERE id = ?',
[$poller_id], '', true, $poller_db_cnn_id);
// update the database hostname based upon the entry
if ($dbhostname == '' || $dbhostname == 'localhost' || $dbhostname == '127.0.0.1') {
if ($database_hostname != 'localhost' && $database_hostname != '127.0.0.1') {
$hostname = $database_hostname;
}
db_execute_prepared('UPDATE poller
SET dbhost = ?
WHERE id = ?',
[$hostname, $poller_id], true, $poller_db_cnn_id);
}
// if you have more than one poller, boost must be enabled
$total_pollers = db_fetch_cell('SELECT COUNT(*) FROM poller');
if ($total_pollers > 1) {
set_config_option('boost_rrd_update_system_enable', 'on');
set_config_option('boost_redirect', 'on');
}
// check to see if the poller is disabled
poller_enabled_check($poller_id);
// install signal handlers for UNIX only
if (function_exists('pcntl_signal')) {
pcntl_signal(SIGTERM, 'sig_handler');
pcntl_signal(SIGINT, 'sig_handler');
}
// record the start time
$poller_start = microtime(true);
$overhead_time = 0;
$current_time = time();
poller_table_maintenance();
api_plugin_hook('poller_top');
// prime the poller_resource_cache for multiple pollers
if (CACTI_CONNECTION == 'online') {
update_resource_cache($poller_id);
}
// get number of polling items from the database
$poller_interval = read_config_option('poller_interval');
// retrieve the last time the poller ran
$poller_lastrun = read_config_option('poller_lastrun_' . $poller_id);
// is boost enabled
$boost_enabled = read_config_option('boost_rrd_update_enable') == 'on' ? true:false;
// collect the system mibs every 4 hours
if ($poller_lastrun % 14440 < $current_time % 14440 || empty($poller_lastrun)) {
$mibs = true;
}
// get the poller data
$poller = db_fetch_row_prepared('SELECT *
FROM poller
WHERE id = ?',
[$poller_id], true, $poller_db_cnn_id);
// get the current cron interval from the database
$cron_interval = read_config_option('cron_interval');
if ($cron_interval != 60) {
$cron_interval = 300;
}
// get max step. If it's not equal to the poller
// interval, we have to force active profiles
// greater than 1.
$max_step = db_fetch_cell('SELECT MAX(dsp.step)
FROM data_source_profiles AS dsp
INNER JOIN data_template_data AS dtd
ON dtd.data_source_profile_id = dsp.id');
// see if the user wishes to use process leveling
$process_leveling = read_config_option('process_leveling');
// retrieve the number of concurrent process settings
if (cacti_sizeof($poller)) {
$concurrent_processes = $poller['processes'];
} else {
$concurrent_processes = read_config_option('concurrent_processes');
}
if (!isset($concurrent_processes) || intval($concurrent_processes) < 1) {
$concurrent_processes = 1;
}
// correct for possible poller output not empty occurrences
$ds_needing_fixes = db_fetch_assoc_prepared('SELECT local_data_id,
MIN(rrd_next_step) AS next_step,
COUNT(DISTINCT rrd_next_step) AS instances
FROM poller_item
WHERE poller_id = ?
AND rrd_num > 1
GROUP BY local_data_id
HAVING instances > 1',
[$poller_id]);
if (cacti_sizeof($ds_needing_fixes)) {
foreach ($ds_needing_fixes as $ds) {
db_execute_prepared('UPDATE poller_item
SET rrd_next_step = ?
WHERE local_data_id = ?',
[$ds['next_step'], $ds['local_data_id']]);
}
}
/**
* shortcut some expensive logic in spine if possible the
* order by snmp port is a rare thing to be needed and only
* needs to occur if your are talking to more than one snmp
* agent on a host.
*/
$total_ports = db_fetch_cell('SELECT COUNT(DISTINCT snmp_port)
FROM poller_item
WHERE snmp_port > 0');
set_config_option('total_snmp_ports', $total_ports);
/**
* determine the number of active profiles to improve poller performance
* under some circumstances. Save this data for spine and cmd.php.
* In the case where the $max_step does not equal the poller interval
* we have to artificially set the $active_profiles > 1
*/
if ($poller_interval != $max_step) {
$active_profiles = 2;
} elseif ($cron_interval == $poller_interval) {
$active_profiles = db_fetch_cell('SELECT COUNT(DISTINCT data_source_profile_id)
FROM data_template_data
WHERE local_data_id > 0');
} else {
$active_profiles = db_fetch_cell('SELECT COUNT(DISTINCT rrd_next_step) FROM poller_item');
}
set_config_option('active_profiles', $active_profiles);
/* assume a scheduled task of either 60 or 300 seconds */
if (!empty($poller_interval)) {
$poller_runs = intval($cron_interval / $poller_interval);
if ($active_profiles != 1) {
$sql_where = "WHERE rrd_next_step - $poller_interval <= 0 AND h.disabled = '' AND pi.poller_id = $poller_id";
} else {
$sql_where = "WHERE pi.poller_id = $poller_id AND h.disabled = ''";
}
define('MAX_POLLER_RUNTIME', $poller_runs * $poller_interval - 2);
} else {
$sql_where = "WHERE pi.poller_id = $poller_id AND h.disabled = ''";
$poller_runs = 1;
$poller_interval = 300;
define('MAX_POLLER_RUNTIME', 298);
}
$num_polling_items = db_fetch_cell('SELECT ' . SQL_NO_CACHE . ' COUNT(*)
FROM poller_item AS pi
INNER JOIN host AS h
ON h.id = pi.host_id ' . $sql_where);
if (isset($concurrent_processes) && $concurrent_processes > 1) {
$items_perhost = array_rekey(
db_fetch_assoc('SELECT ' . SQL_NO_CACHE . " host_id,
COUNT(local_data_id) AS data_sources
FROM poller_item AS pi
INNER JOIN host AS h
ON h.id = pi.host_id
$sql_where
GROUP BY host_id
ORDER BY host_id"),
'host_id', 'data_sources'
);
}
if (isset($items_perhost) && cacti_sizeof($items_perhost)) {
$items_per_process = floor($num_polling_items / $concurrent_processes);
if ($items_per_process == 0) {
$process_leveling = 'off';
}
} else {
$process_leveling = 'off';
}
// some text formatting for platform specific vocabulary
if (CACTI_SERVER_OS == 'unix') {
$task_type = 'Cactid/Cron';
} else {
$task_type = 'Scheduled Task';
}
if ($debug) {
$level = POLLER_VERBOSITY_NONE;
} else {
$level = POLLER_VERBOSITY_MEDIUM;
}
$poller_seconds_sincerun = 'Never';
if (isset($poller_lastrun)) {
$poller_seconds_sincerun = round($poller_start - $poller_lastrun, 2);
}
cacti_log("NOTE: Poller Int: '$poller_interval', $task_type Int: '$cron_interval', Time Since Last: '$poller_seconds_sincerun', Max Runtime '" . MAX_POLLER_RUNTIME. "', Poller Runs: '$poller_runs'", true, 'POLLER', $level);
// our cron can run at either 1 or 5 minute intervals
if ($poller_interval <= 60) {
$min_period = '60';
} else {
$min_period = '300';
}
// get to see if we are polling faster than reported by the settings, if so, exit
if ((isset($poller_lastrun) && isset($poller_interval) && $poller_lastrun > 0) && (!$force)) {
// give the user some flexibility to run a little moe often
if ((($poller_start - $poller_lastrun) * 1.3) < MAX_POLLER_RUNTIME) {
cacti_log("NOTE: $task_type is configured to run too often! The Poller Interval is '$poller_interval' seconds, with a minimum $task_type period of '$min_period' seconds, but only " . number_format_i18n($poller_start - $poller_lastrun, 1) . ' seconds have passed since the poller last ran.', true, 'POLLER', $level);
exit;
}
}
/* check to see whether we have the poller interval set lower than
* the poller is actually ran, if so, issue a warning
*/
if ((($poller_start - $poller_lastrun - 10) > MAX_POLLER_RUNTIME) && ($poller_lastrun > 0)) {
cacti_log("WARNING: $task_type is out of sync with the Poller Interval! The Poller Interval is '$poller_interval' seconds, with a maximum of a '$min_period' second $task_type, but " . number_format_i18n($poller_start - $poller_lastrun, 1) . ' seconds have passed since the last poll!', true, 'POLLER');
admin_email(__('Cacti System Warning'), __('WARNING: %s is out of sync with the Poller Interval for Poller[%d]! The Poller Interval is %d seconds, with a maximum of a %d seconds, but %d seconds have passed since the last poll!', $task_type, $poller_id, $poller_interval, $min_period, number_format_i18n($poller_start - $poller_lastrun, 1)));
}
/* used for current implementation for individual pollers */
set_config_option('poller_lastrun_' . $poller_id, (int)$poller_start);
if ($poller_id == 1) {
/* used for legacy implementation for the main poller */
set_config_option('poller_lastrun', (int)$poller_start);
}
/* let PHP only run 1 second longer than the max runtime,
* plus the poller needs lot's of memory
*/
ini_set('max_execution_time', MAX_POLLER_RUNTIME + 1);
ini_set('memory_limit', '-1');
$poller_runs_completed = 0;
$poller_items_total = 0;
/**
* Update poller statistics once per poller run
*/
$script = $server = $snmp = 0;
$totals = db_fetch_assoc_prepared('SELECT action, COUNT(*) AS totals
FROM poller_item AS pi
WHERE pi.poller_id = ?
GROUP BY action',
[$poller_id]);
if (cacti_sizeof($totals)) {
foreach ($totals as $value) {
switch($value['action']) {
case '0': // SNMP
$snmp = $value['totals'];
break;
case '1': // Script
$script = $value['totals'];
break;
case '2': // Server
$server = $value['totals'];
break;
}
}
}
$devices = db_fetch_cell_prepared('SELECT COUNT(DISTINCT host_id)
FROM poller_item AS pi
WHERE pi.poller_id = ?',
[$poller_id]);
/**
* Update poller data source statistics in the poller table
*/
if (db_column_exists('poller', 'devices')) {
db_execute_prepared('INSERT INTO poller (id, devices, snmp, script, server, last_status, status)
VALUES (?, ?, ?, ?, ?, NOW(), 1)
ON DUPLICATE KEY UPDATE
devices=VALUES(devices),
snmp=VALUES(snmp),
script=VALUES(script),
server=VALUES(server),
last_status=VALUES(last_status),
status=VALUES(status)',
[$poller_id, $devices, $snmp, $script, $server], true, $poller_db_cnn_id);
} else {
db_execute_prepared('INSERT INTO poller (id, snmp, script, server, last_status, status)
VALUES (?, ?, ?, ?, NOW(), 1)
ON DUPLICATE KEY UPDATE
snmp=VALUES(snmp),
script=VALUES(script),
server=VALUES(server),
last_status=VALUES(last_status),
status=VALUES(status)',
[$poller_id, $devices, $snmp, $script, $server], true, $poller_db_cnn_id);
}
/**
* Freshen the field mappings in cases where they
* may have gotten out of sync
*/
db_execute('REPLACE INTO poller_data_template_field_mappings
SELECT dtr.data_template_id, dif.data_name,
GROUP_CONCAT(DISTINCT dtr.data_source_name ORDER BY dtr.data_source_name) AS data_source_names, NOW()
FROM graph_templates_item AS gti
INNER JOIN data_template_rrd AS dtr
ON gti.task_item_id = dtr.id
INNER JOIN data_input_fields AS dif
ON dtr.data_input_field_id = dif.id
WHERE dtr.local_data_id = 0
AND gti.local_graph_id = 0
GROUP BY dtr.data_template_id, dif.data_name');
while ($poller_runs_completed < $poller_runs) {
// record the start time for this loop
$loop_start = microtime(true);
if (db_column_exists('sites', 'disabled')) {
$sql_where = "AND IFNULL(s.disabled, '') != 'on'";
} else {
$sql_where = '';
}
if ($poller_id == '1') {
$polling_hosts = db_fetch_assoc_prepared('SELECT ' . SQL_NO_CACHE . " h.id
FROM host h
LEFT JOIN sites s
ON s.id = h.site_id
WHERE poller_id = ?
AND h.deleted = ''
AND IFNULL(h.disabled,'') != 'on'
$sql_where
ORDER BY id",
[$poller_id]);
$total_polling_hosts = cacti_sizeof($polling_hosts);
if ($total_polling_hosts) {
$polling_hosts = array_merge([0 => ['id' => '0']], $polling_hosts);
} else {
$polling_hosts = [0 => ['id' => '0']];
}
} else {
$polling_hosts = db_fetch_assoc_prepared('SELECT ' . SQL_NO_CACHE . " h.id
FROM host h
LEFT JOIN sites s
ON s.id = h.site_id
WHERE poller_id = ?
AND h.deleted = ''
AND IFNULL(h.disabled, '') != 'on'
$sql_where
ORDER BY id",
[$poller_id]);
$total_polling_hosts = cacti_sizeof($polling_hosts);
}
$hosts_per_process = 0;
$method = 'disabled';
// calculate overhead time
if ($overhead_time == 0) {
$overhead_time = $loop_start - $poller_start;
}
// initialize counters for script file handling
$host_count = 1;
// initialize file creation flags
$change_proc = false;
// initialize file and host count pointers
$started_processes = 0;
$first_host = 0;
$last_host = 0;
$rrds_processed = 0;
$webroot = addslashes((CACTI_SERVER_OS == 'win32') ? strtr(strtolower(substr(__DIR__, 0, 1)) . substr(__DIR__, 1),'\\', '/') : __DIR__);
// update web paths for the poller
set_config_option('path_webroot', $webroot);
// obtain some defaults from the database
$poller_type = read_config_option('poller_type');
if ($poller_type == '1') {
$max_threads = '1';
} elseif (isset($poller['threads'])) {
$max_threads = $poller['threads'];
}
if (intval($max_threads) < 1) {
$max_threads = 1;
}
/* initialize poller_time and poller_output tables,
* check poller_output for issues
*/
$running_processes = db_fetch_cell_prepared('SELECT ' . SQL_NO_CACHE . ' COUNT(*)
FROM poller_time
WHERE poller_id = ?
AND end_time="0000-00-00 00:00:00"',
[$poller_id], '', true, $poller_db_cnn_id);
if ($running_processes) {
cacti_log("WARNING: There are $running_processes processes detected as overrunning a polling cycle, please investigate", true, 'POLLER');
admin_email(__('Cacti System Warning'), __('WARNING: There are %d processes detected as overrunning a polling cycle for Poller[%d], please investigate.', $running_processes, $poller_id));
}
db_execute_prepared('DELETE FROM poller_time
WHERE poller_id = ?',
[$poller_id], true, $poller_db_cnn_id);
/**
* only report issues for the main poller or from bad local
* data ids, other pollers may insert somewhat asynchronously
*/
$issues = [];
$issues_limit = 20;
$issues_check = ($poller_id == 1 || CACTI_CONNECTION == 'online');
$issues_param = [ $current_time, $poller_id, $poller_id ];
$issues_sql = ' FROM poller_output AS po
LEFT JOIN data_local AS dl
ON po.local_data_id = dl.id
LEFT JOIN host AS h
ON dl.host_id = h.id
WHERE time < FROM_UNIXTIME(? - 600)
AND (h.poller_id = ? OR h.id IS NULL or ? = 1)';
if ($issues_check) {
$issues = db_fetch_assoc_prepared('SELECT ' . SQL_NO_CACHE . '
local_data_id, rrd_name' . $issues_sql . '
LIMIT ' . $issues_limit,
$issues_param);
}
if (cacti_sizeof($issues)) {
$count = db_fetch_cell_prepared('SELECT ' . SQL_NO_CACHE . '
COUNT(*)' . $issues_sql,
$issues_param);
$issues_list = [];
foreach ($issues as $issue) {
$issues_list[]= $issue['local_data_id'];
}
$issue_list = 'DS[' . implode(', ', $issues_list) . ']';
if ($count > $issues_limit) {
$issue_list .= ", Additional Issues Remain. Only showing first $issues_limit";
}
$po_debounce = read_config_option('poller_output_debounce');
if ($po_debounce == '') {
set_config_option('poller_output_debounce', '3600');
$po_debounce = 3600;
}
if ($po_debounce == 0 || debounce_run_notification('poller_output_not_empty', $po_debounce)) {
cacti_log("WARNING: Poller Output Table not Empty. Issues: $count, $issue_list", true, 'POLLER');
admin_email(__('Cacti System Warning'), __('WARNING: Poller Output Table not empty for Poller[%d]. Issues: %d, %s.', $poller_id, $count, $issue_list));
}
db_execute_prepared('DELETE po ' . $issues_sql, $issues_param);
}
/**
* adjust for recent memory table problems in MariaDB and memory tables
* being pushed into swap
*/
if ($poller_id == 1 && read_config_option('poller_refresh_output_table') == 'on' && $total_pollers == 1) {
db_execute('CREATE TABLE IF NOT EXISTS po LIKE poller_output');
db_execute('RENAME TABLE poller_output TO poold, po TO poller_output');
db_execute('DROP TABLE IF EXISTS poold');
db_execute('ALTER TABLE poller_output ENGINE=MEMORY');
// catch the unlikely event that the poller_output_boost is missing
if (!db_table_exists('poller_output_boost')) {
db_execute('CREATE TABLE poller_output_boost LIKE poller_output');
db_execute('ALTER TABLE poller_output_boost ENGINE=InnoDB');
}
}
/**
* Empty the host_errors table for the current poller.
* This table is required due to spine using multiple
* threads per device.
*/
db_execute_prepared('DELETE FROM host_errors WHERE poller_id = ?', [$poller_id]);
// mainline
if (read_config_option('poller_enabled') == 'on') {
// determine the number of hosts to process per file
$hosts_per_process = ceil(($poller_id == '1' ? $total_polling_hosts - 1 : $total_polling_hosts) / $concurrent_processes);
$items_launched = 0;
// exit poller if spine is selected and file does not exist
if (($poller_type == '2') && (!file_exists(read_config_option('path_spine')))) {
cacti_log('ERROR: The spine path: ' . read_config_option('path_spine') . ' is invalid. Poller can not continue!', true, 'POLLER');
admin_email(__('Cacti System Warning'), __('ERROR: The spine path: %s is invalid for Poller[%d]. Poller can not continue!', read_config_option('path_spine'), $poller_id));
exit;
}
// determine command name
if ($poller_type == '2') {
$command_string = cacti_escapeshellcmd(read_config_option('path_spine'));
if (read_config_option('path_spine_config') != '' && file_exists(read_config_option('path_spine_config'))) {
$extra_args = ' -C ' . cacti_escapeshellarg(read_config_option('path_spine_config'));
} else {
$extra_args = '';
}
$method = 'spine';
$total_procs = $concurrent_processes * $max_threads;
chdir(dirname(read_config_option('path_spine')));
} elseif (CACTI_SERVER_OS == 'unix') {
$command_string = cacti_escapeshellcmd(read_config_option('path_php_binary'));
$extra_args = '-q ' . cacti_escapeshellarg(CACTI_PATH_BASE . '/cmd.php');
$method = 'cmd.php';
$total_procs = $concurrent_processes;
} else {
$command_string = cacti_escapeshellcmd(read_config_option('path_php_binary'));
$extra_args = '-q ' . cacti_escapeshellarg(strtolower(CACTI_PATH_BASE . '/cmd.php'));
$method = 'cmd.php';
$total_procs = $concurrent_processes;
}
if (read_config_option('path_stderrlog') != '' && CACTI_SERVER_OS != 'win32') {
$extra_parms = '>> ' . read_config_option('path_stderrlog') . ' 2>&1';
} else {
$extra_parms = '';
}
if ($poller_id > 1) {
$extra_args .= ' --mode=' . CACTI_CONNECTION;
}
/* Populate each execution file with appropriate information */
if ($total_polling_hosts > 0) {
foreach ($polling_hosts as $item) {
if ($host_count == 1) {
$first_host = $item['id'];
}
if ($process_leveling != 'on') {
if ($host_count == $hosts_per_process) {
$last_host = $item['id'];
$change_proc = true;
}
} else {
if (isset($items_perhost[$item['id']])) {
$items_launched += $items_perhost[$item['id']];
}
if (($items_launched >= $items_per_process) ||
(cacti_sizeof($items_perhost) == $concurrent_processes)) {
$last_host = $item['id'];
/* if this is the dummy entry for externally updated data sources
* that are not related to any host (host id = 0), do NOT change_proc */
$change_proc = ($item['id'] == 0 ? false : true);
$items_launched = 0;
}
}
$host_count ++;
if ($change_proc) {
exec_background($command_string, "$extra_args --poller=$poller_id --first=$first_host --last=$last_host" . ($mibs ? ' --mibs':''), $extra_parms);
usleep(100000);
$host_count = 1;
$change_proc = false;
$first_host = 0;
$last_host = 0;
$started_processes++;
}
}
// launch the last process
if ($host_count > 1) {
$last_host = $item['id'];
exec_background($command_string, "$extra_args --poller=$poller_id --first=$first_host --last=$last_host" . ($mibs ? ' --mibs':''), $extra_parms);
usleep(100000);
$started_processes++;
}
if ($poller_id == 1) {
// insert the current date/time for graphs
set_config_option('date', date('Y-m-d H:i:s'));
// open a pipe to rrdtool for writing
if (!$boost_enabled) {
$rrdtool_pipe = rrd_init();
}
}
$rrds_processed = 0;
$poller_finishing_dispatched = false;
while (true) {
$finished_processes = db_fetch_cell_prepared('SELECT ' . SQL_NO_CACHE . " COUNT(*)
FROM poller_time
WHERE poller_id = ?
AND end_time >'0000-00-00 00:00:00'",
[$poller_id], '', true, $poller_db_cnn_id);
if ($finished_processes >= $started_processes) {
// all scheduled pollers are finished
if ($poller_finishing_dispatched === false) {
api_plugin_hook('poller_finishing');
$poller_finishing_dispatched = true;
}
if ($poller_id == 1) {
$rrds_processed = $rrds_processed + process_poller_output($rrdtool_pipe, true);
} elseif (CACTI_CONNECTION != 'online') {
/* truncate until formal remote management is supported */
db_execute('TRUNCATE poller_output');
}
log_cacti_stats($loop_start, $method, $concurrent_processes, $max_threads,
($poller_id == '1' ? $total_polling_hosts - 1 : $total_polling_hosts), $hosts_per_process, $num_polling_items, $rrds_processed);
poller_run_stats($loop_start);
break;
} else {
if (read_config_option('log_verbosity') >= POLLER_VERBOSITY_MEDIUM || $debug) {
print 'Waiting on ' . ($started_processes - $finished_processes) . ' of ' . $started_processes . " pollers.\n";
}
$mtb = microtime(true);
if ($poller_id == 1) {
$rrds_processed = $rrds_processed + process_poller_output($rrdtool_pipe);
} elseif (CACTI_CONNECTION != 'online') {
/* truncate until formal remote management is supported */
db_execute('TRUNCATE poller_output');
}
// end the process if the runtime exceeds MAX_POLLER_RUNTIME
if (($poller_start + MAX_POLLER_RUNTIME) < time()) {
cacti_log('Maximum runtime of ' . MAX_POLLER_RUNTIME . ' seconds exceeded. Exiting.', true, 'POLLER');
admin_email(__('Cacti System Warning'), __('Maximum runtime of %d seconds exceeded for Poller[%d]. Exiting.', MAX_POLLER_RUNTIME, $poller_id));
// generate a snmp notification
snmpagent_poller_exiting();
api_plugin_hook_function('poller_exiting');
log_cacti_stats($loop_start, $method, $concurrent_processes, $max_threads,
($poller_id == '1' ? $total_polling_hosts - 1 : $total_polling_hosts), $hosts_per_process, $num_polling_items, $rrds_processed);
poller_run_stats($loop_start);
break;
}
if (microtime(true) - $mtb < 1) {
sleep(1);
}
}
}
if ($poller_id == 1) {
rrd_close($rrdtool_pipe);
}
} else {
if ($poller_id > 1) {
log_cacti_stats($loop_start, $method, $concurrent_processes, $max_threads,
($poller_id == '1' ? $total_polling_hosts - 1 : $total_polling_hosts), $hosts_per_process, $num_polling_items, $rrds_processed);
poller_run_stats($loop_start);
// Mark the poller done immediately due to lack of devices
$start_end = date('Y-m-d H:i:s');
db_execute_prepared('INSERT INTO poller_time
(pid, poller_id, start_time, end_time)
VALUES (?, ?, ?, ?)',
[rand(), $poller_id, $start_end, $start_end], true, $poller_db_cnn_id);
}
}
// process poller commands
$commands = db_fetch_cell_prepared('SELECT ' . SQL_NO_CACHE . ' COUNT(*)
FROM poller_command
WHERE poller_id = ?',
[$poller_id], '', true, $poller_db_cnn_id);
if ($commands > 0) {
$command_string = cacti_escapeshellcmd(read_config_option('path_php_binary'));
$extra_args = '-q ' . cacti_escapeshellarg(CACTI_PATH_BASE . '/poller_commands.php') . ' --poller=' . $poller_id;
exec_background($command_string, $extra_args);
} else {
/* no re-index or Rechache present on this run
* in case, we have more PCOMMANDS than recaching, this has to be moved to poller_commands.php
* but then we'll have to call it each time to make sure, stats are updated */
set_config_option('stats_recache_' . $poller_id, 'Poller:' . $poller_id . ' RecacheTime:0.0 DevicesRecached:0');
}
if ($method == 'spine') {
$webroot = read_config_option('path_webroot');
if (is_dir($webroot)) {
chdir($webroot);
}
}
} else {
cacti_log('WARNING: The Cacti Data Collector is currently disabled!', true, 'POLLER');
}
$poller_runs_completed++;
// push records updates to the main poller
poller_push_data_to_main();
// record the start time for this loop
$loop_end = microtime(true);
$loop_time = $loop_end - $loop_start;
if ($loop_time < $poller_interval) {
// sleep the appropriate amount of time
if ($poller_runs_completed < $poller_runs) {
$plugin_start = microtime(true);
// all plugins moved to core
if ($poller_id == 1) {
snmpagent_poller_bottom();
dsstats_poller_bottom();
dsdebug_poller_bottom();
boost_poller_bottom();
}
api_plugin_hook('poller_bottom');
// record the start time for this loop
$loop_end = microtime(true);
$cur_loop_time = $loop_end - $loop_start;
if ($poller_runs_completed == 1) {
$sleep_time = $poller_interval - $cur_loop_time - $overhead_time;
} else {
$sleep_time = $poller_interval - $cur_loop_time;
}
// log some nice debug information
if ($debug) {
print 'Loop Time is: ' . round($loop_time, 2) . "\n";
print 'Sleep Time is: ' . round($sleep_time, 2) . "\n";
print 'Total Time is: ' . round($loop_end - $poller_start, 2) . "\n";
}
$plugin_end = microtime(true);
if ($sleep_time > 0) {
usleep(intval($sleep_time * 1000000));
}
api_plugin_hook('poller_top');
$num_polling_items = db_fetch_cell('SELECT ' . SQL_NO_CACHE . " COUNT(*)
FROM poller_item AS pi
INNER JOIN host AS h
ON h.id = pi.host_id
LEFT JOIN sites AS s
ON h.site_id = s.id
$sql_where");
}
} else {
cacti_log('WARNING: Cacti Polling Cycle Exceeded Poller Interval by ' . round($loop_end - $loop_start - $poller_interval, 2) . ' seconds', true, 'POLLER', $level);
admin_email(__('Cacti System Warning'), __('WARNING: Cacti Polling Cycle Exceeded Poller Interval by ' . round($loop_end - $loop_start - $poller_interval, 2) . ' seconds', true, 'POLLER', $level));
}
if (!$logged) {
log_cacti_stats($loop_start, $method, $concurrent_processes, $max_threads,
($poller_id == '1' ? $total_polling_hosts - 1 : $total_polling_hosts), $hosts_per_process, $num_polling_items, $rrds_processed);
poller_run_stats($loop_start);
}
}
function poller_heartbeat_check() {
$poller_interval = read_config_option('poller_interval');
$heartbeat_pollers = db_fetch_assoc_prepared('SELECT *, UNIX_TIMESTAMP() - UNIX_TIMESTAMP(last_status) AS heartbeat
FROM poller
WHERE disabled = ""
HAVING heartbeat > ? * 2
OR status = 6',
[$poller_interval]);
if (cacti_sizeof($heartbeat_pollers)) {
foreach ($heartbeat_pollers as $p) {
db_execute_prepared('UPDATE poller SET status = 6 WHERE id = ?', [$p['id']]);
if (debounce_run_notification('poller_heartbeat_' . $p['id'], 1800)) {
$log_message = sprintf('WARNING: Poller[%s] with Name:%s is in Heartbeat Status', $p['id'], $p['name']);
$email_message = __('WARNING: PollerID:%s with Name:%s is in Heartbeat Status', $p['id'], $p['name']);
cacti_log($log_message, false, 'POLLER');
admin_email(__('Poller in Heartbeat Mode'), $email_message);
}
}