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#!/usr/bin/env php
<?php
// This file is part of BOINC.
// http://boinc.berkeley.edu
// Copyright (C) 2014 University of California
//
// BOINC is free software; you can redistribute it and/or modify it
// under the terms of the GNU Lesser General Public License
// as published by the Free Software Foundation,
// either version 3 of the License, or (at your option) any later version.
//
// BOINC 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 Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with BOINC. If not, see <http://www.gnu.org/licenses/>.
// Find the status of remote server processes
// and write it to a serialized file.
// Run this as a periodic task; in general it can't run as a web script
// since the apache user can't ssh.
//
// "remote" means a machine other than the project's web server.
//
// In config.xml, hosts are identified by machine name (not domain name).
//
// The web server machine name may be specified by <www_host> in config.xml.
// If this is not specified, it's assumed to be the project's main host
// as specified by <host> in config.xml
//
// the specification of a daemon in config.xml may have a <host> element;
// if absent, it runs on the main host.
//
// the upload and download servers are specified by URL.
// To decide if these are the same as the web server,
// we compare the host part of the URLs with the host part of the master URL.
require_once("../inc/util.inc");
// see if a web server is running at the given URL
//
function web_server_running($url) {
$u = parse_url($url);
$url = $u['scheme']."://".$u['host'];
$ch = curl_init($url);
curl_setopt($ch, CURLOPT_NOBODY, true);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
curl_exec($ch);
$retcode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
curl_close($ch);
$retcode = (int)($retcode/100);
return ($retcode == 2 || $retcode == 4);
}
// see if the given daemon is running on the host by checking its PID
//
function is_daemon_running($host, $d) {
if ($d->pid_file) {
$path = "../../pid_$host/".(string)$d->pid_file;
} else {
$cmd = explode(" ", $d->cmd);
$prog = $cmd[0];
$path = "../../pid_$host/$prog".".pid";
}
$pid = trim(@file_get_contents($path));
if ($pid === false) return false;
$cmd = "ssh $host 'ps $pid'";
$out = exec($cmd);
if (strstr($out, $pid)) return true;
return false;
}
function main() {
echo "--- Starting at ".time_str(time())." ---\n";
$x = array();
$c = simplexml_load_file("../../config.xml");
if (!$c) {
die("can't parse config file\n");
}
$config = $c->config;
$master_url = (string) $config->master_url;
$u = parse_url($master_url);
$master_host = $u["host"];
$url = (string) $config->download_url;
$u = parse_url($url);
$h = $u["host"];
if ($h != $master_host) {
$y = new StdClass;
$y->cmd = 'Download server';
$y->host = $h;
$y->status = web_server_running($url)?1:0;
$x[] = $y;
}
$url = (string) $config->upload_url;
$u = parse_url($url);
$h = $u["host"];
if ($h != $master_host) {
$y = new StdClass;
$y->cmd = 'Upload server';
$y->host = $h;
$y->status = web_server_running($url)?1:0;
$x[] = $y;
}
$main_host = (string)$c->config->host;
if ($c->config->www_host) {
$web_host = (string) $c->config->www_host;
} else {
$web_host = $main_host;
}
$daemons = $c->daemons;
foreach ($daemons->daemon as $d) {
if ((int)$d->disabled != 0) continue;
$host = $d->host?(string)$d->host:$main_host;
if ($host != $web_host) {
$y = new StdClass;
$y->cmd = (string)$d->cmd;
$y->host = $host;
if (is_daemon_running($host, $d)) {
//echo "$host $d->cmd is running\n";
$y->status = 1;
} else {
//echo "$host $d->cmd is not running\n";
$y->status = 0;
}
$x[] = $y;
}
}
$x = serialize($x);
file_put_contents("../cache/remote_server_status", $x);
echo "--- Finished at ".time_str(time())." ---\n";
}
main();
?>
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