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Merge pull request #2975 from annando/1611-frontend-worker

Browse source 
The worker can now run from the frontend as well
This commit is contained in:
Tobias Diekershoff 2016-11-29 09:40:59 +01:00 committed by GitHub
commit d55d500e35
6 changed files with 332 additions and 94 deletions
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4
boot.php
View file

@ -1385,6 +1385,10 @@ class App {
function proc_run($args) {
if (!function_exists("proc_open")) {
return;
}
// Add the php path if it is a php call
if (count($args) && ($args[0] === 'php' OR !is_string($args[0]))) {

2
doc/htconfig.md
View file

@ -29,6 +29,8 @@ Example: To set the directory value please add this line to your .htconfig.php:
* disable_email_validation (Boolean) - Disables the check if a mail address is in a valid format and can be resolved via DNS.
* disable_url_validation (Boolean) - Disables the DNS lookup of an URL.
* event_input_format - Default value is "ymd".
* frontend_worker (Boolean) - Activates the frontend worker which acts as a replacement for running the poller via the command line.
* frontend_worker_timeout - Value in minutes after we think that a frontend task was killed by the webserver. Default value is 10.
* ignore_cache (Boolean) - For development only. Disables the item cache.
* like_no_comment (Boolean) - Don't update the "commented" value of an item when it is liked.
* local_block (Boolean) - Used in conjunction with "block_public".

268
include/poller.php
View file

@ -15,7 +15,7 @@ use \Friendica\Core\PConfig;
require_once("boot.php");
function poller_run(&$argv, &$argc){
function poller_run($argv, $argc){
global $a, $db;
if(is_null($a)) {
@ -35,8 +35,6 @@ function poller_run(&$argv, &$argc){
$a->start_process();
$mypid = getmypid();
if ($a->max_processes_reached())
return;
@ -53,14 +51,7 @@ function poller_run(&$argv, &$argc){
}
if(($argc <= 1) OR ($argv[1] != "no_cron")) {
// Run the cron job that calls all other jobs
proc_run(PRIORITY_MEDIUM, "include/cron.php");
// Run the cronhooks job separately from cron for being able to use a different timing
proc_run(PRIORITY_MEDIUM, "include/cronhooks.php");
// Cleaning dead processes
poller_kill_stale_workers();
poller_run_cron();
} else
// Sleep four seconds before checking for running processes again to avoid having too many workers
sleep(4);
@ -69,95 +60,18 @@ function poller_run(&$argv, &$argc){
if (poller_too_much_workers())
return;
$cooldown = Config::get("system", "worker_cooldown", 0);
$starttime = time();
while ($r = poller_worker_process()) {
// Quit when in maintenance
if (get_config('system', 'maintenance', true))
return;
// Constantly check the number of parallel database processes
if ($a->max_processes_reached())
return;
// Constantly check the number of available database connections to let the frontend be accessible at any time
if (poller_max_connections_reached())
return;
// Count active workers and compare them with a maximum value that depends on the load
if (poller_too_much_workers())
if (poller_too_much_workers()) {
return;
$upd = q("UPDATE `workerqueue` SET `executed` = '%s', `pid` = %d WHERE `id` = %d AND `pid` = 0",
dbesc(datetime_convert()),
intval($mypid),
intval($r[0]["id"]));
if (!$upd) {
logger("Couldn't update queue entry ".$r[0]["id"]." - skip this execution", LOGGER_DEBUG);
q("COMMIT");
continue;
}
// Assure that there are no tasks executed twice
$id = q("SELECT `pid`, `executed` FROM `workerqueue` WHERE `id` = %d", intval($r[0]["id"]));
if (!$id) {
logger("Queue item ".$r[0]["id"]." vanished - skip this execution", LOGGER_DEBUG);
q("COMMIT");
continue;
} elseif ((strtotime($id[0]["executed"]) <= 0) OR ($id[0]["pid"] == 0)) {
logger("Entry for queue item ".$r[0]["id"]." wasn't stored - skip this execution", LOGGER_DEBUG);
q("COMMIT");
continue;
} elseif ($id[0]["pid"] != $mypid) {
logger("Queue item ".$r[0]["id"]." is to be executed by process ".$id[0]["pid"]." and not by me (".$mypid.") - skip this execution", LOGGER_DEBUG);
q("COMMIT");
continue;
if (!poller_execute($r[0])) {
return;
}
q("COMMIT");
$argv = json_decode($r[0]["parameter"]);
$argc = count($argv);
// Check for existance and validity of the include file
$include = $argv[0];
if (!validate_include($include)) {
logger("Include file ".$argv[0]." is not valid!");
q("DELETE FROM `workerqueue` WHERE `id` = %d", intval($r[0]["id"]));
continue;
}
require_once($include);
$funcname = str_replace(".php", "", basename($argv[0]))."_run";
if (function_exists($funcname)) {
logger("Process ".$mypid." - Prio ".$r[0]["priority"]." - ID ".$r[0]["id"].": ".$funcname." ".$r[0]["parameter"]);
// For better logging create a new process id for every worker call
// But preserve the old one for the worker
$old_process_id = $a->process_id;
$a->process_id = uniqid("wrk", true);
$funcname($argv, $argc);
$a->process_id = $old_process_id;
if ($cooldown > 0) {
logger("Process ".$mypid." - Prio ".$r[0]["priority"]." - ID ".$r[0]["id"].": ".$funcname." - in cooldown for ".$cooldown." seconds");
sleep($cooldown);
}
logger("Process ".$mypid." - Prio ".$r[0]["priority"]." - ID ".$r[0]["id"].": ".$funcname." - done");
q("DELETE FROM `workerqueue` WHERE `id` = %d", intval($r[0]["id"]));
} else
logger("Function ".$funcname." does not exist");
// Quit the poller once every hour
if (time() > ($starttime + 3600))
@ -166,6 +80,108 @@ function poller_run(&$argv, &$argc){
}
/**
* @brief Execute a worker entry
*
* @param array $queue Workerqueue entry
*
* @return boolean "true" if further processing should be stopped
*/
function poller_execute($queue) {
$a = get_app();
$mypid = getmypid();
$cooldown = Config::get("system", "worker_cooldown", 0);
// Quit when in maintenance
if (get_config('system', 'maintenance', true)) {
return false;
}
// Constantly check the number of parallel database processes
if ($a->max_processes_reached()) {
return false;
}
// Constantly check the number of available database connections to let the frontend be accessible at any time
if (poller_max_connections_reached()) {
return false;
}
$upd = q("UPDATE `workerqueue` SET `executed` = '%s', `pid` = %d WHERE `id` = %d AND `pid` = 0",
dbesc(datetime_convert()),
intval($mypid),
intval($queue["id"]));
if (!$upd) {
logger("Couldn't update queue entry ".$queue["id"]." - skip this execution", LOGGER_DEBUG);
q("COMMIT");
return true;
}
// Assure that there are no tasks executed twice
$id = q("SELECT `pid`, `executed` FROM `workerqueue` WHERE `id` = %d", intval($queue["id"]));
if (!$id) {
logger("Queue item ".$queue["id"]." vanished - skip this execution", LOGGER_DEBUG);
q("COMMIT");
return true;
} elseif ((strtotime($id[0]["executed"]) <= 0) OR ($id[0]["pid"] == 0)) {
logger("Entry for queue item ".$queue["id"]." wasn't stored - skip this execution", LOGGER_DEBUG);
q("COMMIT");
return true;
} elseif ($id[0]["pid"] != $mypid) {
logger("Queue item ".$queue["id"]." is to be executed by process ".$id[0]["pid"]." and not by me (".$mypid.") - skip this execution", LOGGER_DEBUG);
q("COMMIT");
return true;
}
q("COMMIT");
$argv = json_decode($queue["parameter"]);
$argc = count($argv);
// Check for existance and validity of the include file
$include = $argv[0];
if (!validate_include($include)) {
logger("Include file ".$argv[0]." is not valid!");
q("DELETE FROM `workerqueue` WHERE `id` = %d", intval($queue["id"]));
return true;
}
require_once($include);
$funcname = str_replace(".php", "", basename($argv[0]))."_run";
if (function_exists($funcname)) {
logger("Process ".$mypid." - Prio ".$queue["priority"]." - ID ".$queue["id"].": ".$funcname." ".$queue["parameter"]);
// For better logging create a new process id for every worker call
// But preserve the old one for the worker
$old_process_id = $a->process_id;
$a->process_id = uniqid("wrk", true);
$funcname($argv, $argc);
$a->process_id = $old_process_id;
if ($cooldown > 0) {
logger("Process ".$mypid." - Prio ".$queue["priority"]." - ID ".$queue["id"].": ".$funcname." - in cooldown for ".$cooldown." seconds");
sleep($cooldown);
}
logger("Process ".$mypid." - Prio ".$queue["priority"]." - ID ".$queue["id"].": ".$funcname." - done");
q("DELETE FROM `workerqueue` WHERE `id` = %d", intval($queue["id"]));
} else {
logger("Function ".$funcname." does not exist");
}
return true;
}
/**
* @brief Checks if the number of database connections has reached a critical limit.
*
@ -295,6 +311,11 @@ function poller_kill_stale_workers() {
}
}
/**
* @brief Checks if the number of active workers exceeds the given limits
*
* @return bool Are there too much workers running?
*/
function poller_too_much_workers() {
@ -373,6 +394,11 @@ function poller_too_much_workers() {
return($active >= $queues);
}
/**
* @brief Returns the number of active poller processes
*
* @return integer Number of active poller processes
*/
function poller_active_workers() {
$workers = q("SELECT COUNT(*) AS `processes` FROM `process` WHERE `command` = 'poller.php'");
@ -394,8 +420,7 @@ function poller_passing_slow(&$highest_priority) {
$r = q("SELECT `priority`
FROM `process`
INNER JOIN `workerqueue` ON `workerqueue`.`pid` = `process`.`pid`
WHERE `process`.`command` = 'poller.php'");
INNER JOIN `workerqueue` ON `workerqueue`.`pid` = `process`.`pid`");
// No active processes at all? Fine
if (!dbm::is_result($r))
@ -435,7 +460,6 @@ function poller_passing_slow(&$highest_priority) {
*
* @return string SQL statement
*/
function poller_worker_process() {
q("START TRANSACTION;");
@ -464,6 +488,62 @@ function poller_worker_process() {
return $r;
}
/**
* @brief Call the front end worker
*/
function call_worker() {
if (!get_config("system", "frontend_worker")) {
return;
}
$url = get_app()->get_baseurl()."/worker";
fetch_url($url, false, $redirects, 1);
}
/**
* @brief Call the front end worker if there aren't any active
*/
function call_worker_if_idle() {
if (!get_config("system", "frontend_worker")) {
return;
}
poller_run_cron();
clear_worker_processes();
$workers = q("SELECT COUNT(*) AS `processes` FROM `process` WHERE `command` = 'worker.php'");
if ($workers[0]["processes"] == 0) {
call_worker();
}
}
/**
* @brief Removes long running worker processes
*/
function clear_worker_processes() {
$timeout = Config::get("system", "frontend_worker_timeout", 10);
/// @todo We should clean up the corresponding workerqueue entries as well
q("DELETE FROM `process` WHERE `created` < '%s' AND `command` = 'worker.php'",
dbesc(datetime_convert('UTC','UTC',"now - ".$timeout." minutes")));
}
/**
* @brief Runs the cron processes
*/
function poller_run_cron() {
// Run the cron job that calls all other jobs
proc_run(PRIORITY_MEDIUM, "include/cron.php");
// Run the cronhooks job separately from cron for being able to use a different timing
proc_run(PRIORITY_MEDIUM, "include/cronhooks.php");
// Cleaning dead processes
poller_kill_stale_workers();
}
if (array_search(__file__,get_included_files())===0){
poller_run($_SERVER["argv"],$_SERVER["argc"]);

4
index.php
View file

@ -99,6 +99,10 @@ if (!$a->is_backend()) {
$stamp1 = microtime(true);
session_start();
$a->save_timestamp($stamp1, "parser");
} else {
require_once "include/poller.php";
call_worker_if_idle();
}
/**

47
mod/worker.php Normal file
View file

@ -0,0 +1,47 @@
<?php
/**
* @file mod/worker.php
* @brief Module for running the poller as frontend process
*/
require_once("include/poller.php");
use \Friendica\Core\Config;
use \Friendica\Core\PConfig;
function worker_init($a){
if (!Config::get("system", "frontend_worker")) {
return;
}
clear_worker_processes();
$workers = q("SELECT COUNT(*) AS `processes` FROM `process` WHERE `command` = 'worker.php'");
if ($workers[0]["processes"] > Config::get("system", "worker_queues", 4)) {
return;
}
$a->start_process();
logger("Front end worker started: ".getmypid());
call_worker();
if ($r = poller_worker_process()) {
// On most configurations this parameter wouldn't have any effect.
// But since it doesn't destroy anything, we just try to get more execution time in any way.
set_time_limit(0);
poller_execute($r[0]);
}
call_worker();
$a->end_process();
logger("Front end worker ended: ".getmypid());
killme();
}

101
util/daemon.php Normal file
View file

@ -0,0 +1,101 @@
<?php
/**
* @file util/daemon.php
* @brief Run the poller from a daemon.
*
* This script was taken from http://php.net/manual/en/function.pcntl-fork.php
*/
function shutdown() {
posix_kill(posix_getpid(), SIGHUP);
}
if (in_array("start", $_SERVER["argv"])) {
$mode = "start";
}
if (in_array("stop", $_SERVER["argv"])) {
$mode = "stop";
}
if (in_array("status", $_SERVER["argv"])) {
$mode = "status";
}
if (!isset($mode)) {
die("Please use either 'start', 'stop' or 'status'.\n");
}
@include(".htconfig.php");
if (!isset($pidfile)) {
die('Please specify a pid file in the variable $pidfile in the .htconfig.php. For example:'."\n".
'$pidfile = "/path/to/daemon.pid";'."\n");
}
if (in_array($mode, array("stop", "status"))) {
$pid = @file_get_contents($pidfile);
if (!$pid) {
die("Pidfile wasn't found. Is the daemon running?\n");
}
}
if ($mode == "status") {
if (posix_kill($pid, 0)) {
die("Daemon process $pid is running.\n");
}
unlink($pidfile);
die("Daemon process $pid isn't running.\n");
}
if ($mode == "stop") {
posix_kill($pid, SIGTERM);
unlink($pidfile);
die("Worker daemon process $pid was killed.\n");
}
echo "Starting worker daemon.\n";
if (isset($a->config['php_path'])) {
$php = $a->config['php_path'];
} else {
$php = "php";
}
// Switch over to daemon mode.
if ($pid = pcntl_fork())
return; // Parent
fclose(STDIN); // Close all of the standard
fclose(STDOUT); // file descriptors as we
fclose(STDERR); // are running as a daemon.
register_shutdown_function('shutdown');
if (posix_setsid() < 0)
return;
if ($pid = pcntl_fork())
return; // Parent
$pid = getmypid();
file_put_contents($pidfile, $pid);
// Now running as a daemon.
while (true) {
// Just to be sure that this script really runs endlessly
set_time_limit(0);
// Call the poller
$cmdline = $php.' include/poller.php';
exec($cmdline);
// Now sleep for 5 minutes
sleep(300);
}
?>