Current File : //backups/router/usr/local/sbin/carp_service_status
#!/usr/local/bin/php
<?php
/*
* Copyright (C) 2019 Deciso B.V.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
* OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
require_once 'config.inc';
require_once 'util.inc';
// Define a high value on service fail, so we can bitmask the current demotion easily.
// This should prevent the need to maintain state elsewhere.
define("SRV_FAIL_FACTOR", pow(2, 20));
// init carp service status
openlog("carp", LOG_ODELAY, LOG_DAEMON);
$fp = fopen('/var/run/carp_service_status.lock', 'a+e');
if (flock($fp, LOCK_EX)) {
$current_demotion = get_single_sysctl("net.inet.carp.demotion");
$failed_services = array();
foreach (glob("/usr/local/etc/rc.carp_service_status.d/*") as $filename) {
if (is_executable($filename)) {
$status = mwexec($filename, true);
if ($status != 0) {
$failed_services[] = basename($filename);
}
}
}
$demotion_set = ($current_demotion & SRV_FAIL_FACTOR);
if (!empty($failed_services) && !$demotion_set) {
// demotion bitmask not set and service(s) fail(ed)
syslog(LOG_WARNING, sprintf(
"carp demoted by %d due to service disruption (services: %s)",
SRV_FAIL_FACTOR, implode(",", $failed_services)
));
set_single_sysctl("net.inet.carp.demotion", SRV_FAIL_FACTOR);
} elseif (empty($failed_services) && $demotion_set) {
// demotion bitmask set and service(s) operational
syslog(LOG_WARNING, sprintf("carp promoted by %d due to service recovery", SRV_FAIL_FACTOR));
set_single_sysctl("net.inet.carp.demotion", -1 * SRV_FAIL_FACTOR);
}
flock($fp, LOCK_UN);
fclose($fp);
}
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