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<?php
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/* $Id$ */
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/*
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vslb.inc
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Copyright (C) 2005 Bill Marquette
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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1. Redistributions of source code must retain the above copyright notice,
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this list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
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INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
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AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
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OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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*/
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/* include all configuration functions */
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require_once("functions.inc");
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require_once("pkg-utils.inc");
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require_once("notices.inc");
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function slbd_configure() {
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global $config, $g;
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$a_vs = &$config['load_balancer']['virtual_server'];
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$a_pool = &$config['load_balancer']['lbpool'];
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$should_start=0;
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$fd = fopen("{$g['varetc_path']}/slbd.conf", "w");
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/* Virtual server pools */
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if(is_array($a_vs)) {
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foreach ($a_vs as $vsent) {
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if ($vsent['desc'] == "")
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$slbdconf .= "{$vsent['name']}:\\\n";
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else
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$slbdconf .= "{$vsent['name']}|{$vsent['desc']}:\\\n";
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/* pool name */
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$slbdconf .= "\t:poolname={$vsent['name']}:\\\n";
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/* virtual IP */
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$slbdconf .= "\t:vip={$vsent['ipaddr']}:\\\n";
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/* virtual port */
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$slbdconf .= "\t:vip-port={$vsent['port']}:\\\n";
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if($vsent['port'] <> "" and $vsent['sitedown'] <> "") {
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/* fallback IP */
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$slbdconf .= "\t:sitedown={$vsent['sitedown']}:\\\n";
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/* fallback port */
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$slbdconf .= "\t:sitedown-port={$vsent['port']}:\\\n";
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}
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for ($i = 0; isset($config['load_balancer']['lbpool'][$i]); $i++) {
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if ($config['load_balancer']['lbpool'][$i]['name'] == $vsent['pool']) {
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$svrcnt = 0;
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$svrtxt = "";
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$svrtxt = "\t:service-port={$config['load_balancer']['lbpool'][$i]['port']}:\\\n";
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foreach ($config['load_balancer']['lbpool'][$i]['servers'] as $lbsvr) {
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$svrtxt .= "\t:{$svrcnt}={$lbsvr}:\\\n";
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$svrcnt++;
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}
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$slbdconf .= "\t:method=round-robin:\\\n";
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$slbdconf .= "\t:services={$svrcnt}:\\\n";
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$slbdconf .= $svrtxt;
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}
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}
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$slbdconf .= "\t:tcppoll:send=:expect=:\n";
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$should_start=1;
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}
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}
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/* Gateway Pools */
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if(is_array($a_pool)) {
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foreach ($a_pool as $vspool) {
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if ($vspool['type'] != "gateway")
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continue;
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if ($vspool['desc'] == "")
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$slbdconf .= "{$vspool['name']}:\\\n";
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else
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$slbdconf .= "{$vspool['name']}|{$vspool['desc']}:\\\n";
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/* pool name */
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$slbdconf .= "\t:poolname={$vspool['name']}:\\\n";
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/* virtual IP */
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$slbdconf .= "\t:vip=127.0.0.1:\\\n";
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$slbdconf .= "\t:vip-port=666:\\\n";
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/* fallback IP */
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$slbdconf .= "\t:sitedown=127.0.0.1:\\\n";
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/* fallback port */
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$slbdconf .= "\t:sitedown-port=666:\\\n";
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$svrcnt = 0;
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$svrtxt = "";
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foreach ($vspool['servers'] as $lbsvr) {
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$lbsvr_split=split("\|", $lbsvr);
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$svrtxt .= "\t:{$svrcnt}={$lbsvr_split[1]}:\\\n";
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$svrcnt++;
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/* Add static routes to the monitor IPs */
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$next_hop = exec_command("/sbin/route -n get {$lbsvr_split[1]} | /usr/bin/grep gateway |/usr/bin/awk '{ print \$2; };'");
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if ($next_hop != $lbsvr_split[0]) {
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mwexec("/sbin/route delete -host {$lbsvr_split[1]} 1>/dev/null 2>&1");
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mwexec("/sbin/route add -host {$lbsvr_split[1]} {$lbsvr_split[0]} 1> /dev/null 2>&1");
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}
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}
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$slbdconf .= "\t:service-port=666:\\\n";
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$slbdconf .= "\t:method=round-robin:\\\n";
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$slbdconf .= "\t:services={$svrcnt}:\\\n";
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$slbdconf .= $svrtxt;
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$slbdconf .= "\t:ping:\n";
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$should_start=1;
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}
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}
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if($should_start == 1) {
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fwrite($fd, $slbdconf);
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fclose($fd);
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mwexec("/usr/bin/killall -9 slbd");
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/* startup slbd pointing it's config at /var/etc/slbd.conf with a polling interval of 5 seconds */
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mwexec("/usr/local/sbin/slbd -c{$g['varetc_path']}/slbd.conf -r5000");
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} else {
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mwexec("/usr/bin/killall -9 slbd");
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fclose($fd);
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}
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}
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?>
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