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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) 2005-2008 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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/* DISABLE_PHP_LINT_CHECKING */
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/* include all configuration functions */
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require_once("config.inc");
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class Monitor {
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private $conf = array();
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function __construct($config) {
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$this->conf = $config;
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}
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public function p() {
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return "check {$this->get('proto')}";
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}
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private function get($var) {
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return isset($this->$var) ? $this->$var : "";
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}
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protected function config($element) {
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return isset($this->conf[$element]) ? $this->conf[$element] : "";
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}
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}
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class TCPMonitor extends Monitor {
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protected $proto = 'tcp';
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}
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class SSLMonitor extends Monitor {
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protected $proto = 'ssl';
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}
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class ICMPMonitor extends Monitor {
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protected $proto = 'icmp';
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}
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class HTTPMonitor extends Monitor {
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protected $proto = 'http';
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function __construct($config) {
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parent::__construct($config);
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}
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public function p() {
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$method = ($this->code() != "") ? $this->code() : $this->digest();
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return "check {$this->proto} {$this->path()} {$this->host()} {$method}";
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}
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private function path() {
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return $this->config('path') != "" ? "'{$this->config('path')}'" : "";
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}
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private function host() {
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return $this->config('host') != "" ? "host {$this->config('host')}" : "";
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}
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private function code() {
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return $this->config('code') != "" ? "code {$this->config('code')}" : "";
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}
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private function digest() {
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return $this->config('digest') != "" ? "digest {$this->config('digest')}" : "";
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}
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}
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class HTTPSMonitor extends HTTPMonitor {
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protected $proto = 'https';
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}
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class SendMonitor extends Monitor {
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private $proto = 'send';
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function __construct($config) {
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parent::__construct($config);
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}
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public function p() {
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return "check {$this->proto} {$this->data()} expect {$this->pattern()} {$this->ssl()}";
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}
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private function data() {
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return $this->config('send') != "" ? "{$this->config('send')}" : "";
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}
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private function pattern() {
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return $this->config('expect') != "" ? "{$this->config('expect')}" : "";
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}
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private function ssl() {
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return $this->config('ssl') == true ? "ssl" : "";
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}
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}
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function echo_lbaction($action) {
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global $config;
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// Index actions by name
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$actions_a = array();
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for ($i=0; isset($config['load_balancer']['lbaction'][$i]); $i++)
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$actions_a[$config['load_balancer']['lbaction'][$i]['name']] = $config['load_balancer']['lbaction'][$i];
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$ret = "";
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$ret .= "{$actions_a[$action]['direction']} {$actions_a[$action]['type']} {$actions_a[$action]['action']}";
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switch($actions_a[$action]['action']) {
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case 'append': {
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$ret .= " \"{$actions_a[$action]['options']['value']}\" to \"{$actions_a[$action]['options']['akey']}\"";
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break;
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}
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case 'change': {
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$ret .= " \"{$actions_a[$action]['options']['akey']}\" to \"{$actions_a[$action]['options']['value']}\"";
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break;
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}
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case 'expect': {
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$ret .= " \"{$actions_a[$action]['options']['value']}\" from \"{$actions_a[$action]['options']['akey']}\"";
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break;
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}
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case 'filter': {
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$ret .= " \"{$actions_a[$action]['options']['value']}\" from \"{$actions_a[$action]['options']['akey']}\"";
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break;
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}
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case 'hash': {
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$ret .= " \"{$actions_a[$action]['options']['akey']}\"";
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break;
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}
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case 'log': {
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$ret .= " \"{$actions_a[$action]['options']['akey']}\"";
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break;
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}
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}
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return $ret;
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}
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function relayd_configure() {
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global $config, $g;
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$vs_a = $config['load_balancer']['virtual_server'];
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$pool_a = $config['load_balancer']['lbpool'];
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$protocol_a = $config['load_balancer']['lbprotocol'];
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$check_a = array();
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foreach ((array)$config['load_balancer']['monitor_type'] as $type) {
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switch($type['type']) {
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case 'icmp': {
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$mon = new ICMPMonitor($type['options']);
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break;
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}
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case 'tcp': {
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$mon = new TCPMonitor($type['options']);
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break;
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}
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case 'http': {
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$mon = new HTTPMonitor($type['options']);
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break;
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}
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case 'https': {
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$mon = new HTTPSMonitor($type['options']);
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break;
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}
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case 'send': {
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$mon = new SendMonitor($type['options']);
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break;
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}
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}
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$check_a[$type['name']] = $mon->p();
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}
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$fd = fopen("{$g['varetc_path']}/relayd.conf", "w");
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/* reindex pools by name as we loop through the pools array */
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$pools = array();
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/* Virtual server pools */
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if(is_array($pool_a)) {
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for ($i = 0; isset($pool_a[$i]); $i++) {
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if(is_array($pool_a[$i]['servers'])) {
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$srvtxt = implode(", ", $pool_a[$i]['servers']);
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$conf .= "table <{$pool_a[$i]['name']}> { $srvtxt }\n";
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/* Index by name for easier fetching when we loop through the virtual servers */
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$pools[$pool_a[$i]['name']] = $pool_a[$i];
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}
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}
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}
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if(is_array($protocol_a)) {
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for ($i = 0; isset($protocol_a[$i]); $i++) {
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$proto = "{$protocol_a[$i]['type']} protocol \"{$protocol_a[$i]['name']}\" {\n";
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if(is_array($protocol_a[$i]['lbaction'])) {
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if($protocol_a[$i]['lbaction'][0] == "") {
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continue;
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}
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for ($a = 0; isset($protocol_a[$i]['lbaction'][$a]); $a++) {
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$proto .= " " . echo_lbaction($protocol_a[$i]['lbaction'][$a]) . "\n";
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}
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}
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$proto .= "}\n";
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$conf .= $proto;
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}
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}
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if(is_array($vs_a)) {
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for ($i = 0; isset($vs_a[$i]); $i++) {
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switch($vs_a[$i]['mode']) {
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case 'redirect': {
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$conf .= "redirect \"{$vs_a[$i]['name']}\" {\n";
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$conf .= " listen on {$vs_a[$i]['ipaddr']} port {$vs_a[$i]['port']}\n";
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$conf .= " forward to <{$vs_a[$i]['pool']}> port {$pools[$vs_a[$i]['pool']]['port']} {$check_a[$pools[$vs_a[$i]['pool']]['monitor']]} timeout 1000\n";
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# sitedown MUST use the same port as the primary pool - sucks, but it's a relayd thing
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if (isset($vs_a[$i]['sitedown']) && $vs_a[$i]['sitedown'] != "")
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$conf .= " forward to <{$vs_a[$i]['sitedown']}> port {$pools[$vs_a[$i]['pool']]['port']} {$check_a[$pools[$vs_a[$i]['pool']]['monitor']]} timeout 1000\n";
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$conf .= "}\n";
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break;
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}
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case 'relay': {
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$conf .= "relay \"{$vs_a[$i]['name']}\" {\n";
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$conf .= " listen on {$vs_a[$i]['ipaddr']} port {$vs_a[$i]['port']}\n";
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$conf .= " protocol \"{$vs_a[$i]['relay_protocol']}\"\n";
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$conf .= " forward to <{$vs_a[$i]['pool']}> port {$pools[$vs_a[$i]['pool']]['port']} {$check_a[$pools[$vs_a[$i]['pool']]['monitor']]} timeout 1000\n";
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if (isset($vs_a[$i]['sitedown']) && $vs_a[$i]['sitedown'] != "")
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$conf .= " forward to <{$vs_a[$i]['sitedown']}> port {$pools[$vs_a[$i]['pool']]['port']} {$check_a[$pools[$vs_a[$i]['pool']]['monitor']]} timeout 1000\n";
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$conf .= "}\n";
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break;
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}
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}
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}
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}
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fwrite($fd, $conf);
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fclose($fd);
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if (is_process_running('relayd: parent')) {
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/*
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* XXX: Something breaks our control connection with relayd and makes relayctl stop working
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* rule reloads are the current suspect
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* mwexec('/usr/local/bin/relayctl stop');
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*/
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mwexec('pkill relayd');
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}
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if (! empty($vs_a)) {
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mwexec("/usr/local/sbin/relayd -f {$g['varetc_path']}/relayd.conf");
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}
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}
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?>
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