Copyright (C) 2008 Remco Hoef 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, 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("guiconfig.inc"); $d_haproxyconfdirty_path = $g['varrun_path'] . "/haproxy.conf.dirty"; if (!is_array($config['installedpackages']['haproxy']['ha_backends']['item'])) { $config['installedpackages']['haproxy']['ha_backends']['item'] = array(); } $a_backend = &$config['installedpackages']['haproxy']['ha_backends']['item']; if (isset($_POST['id'])) $id = $_POST['id']; else $id = $_GET['id']; if (isset($id) && $a_backend[$id]) { $pconfig['name'] = $a_backend[$id]['name']; $pconfig['desc'] = $a_backend[$id]['desc']; $pconfig['connection_timeout'] = $a_backend[$id]['connection_timeout']; $pconfig['server_timeout'] = $a_backend[$id]['server_timeout']; $pconfig['retries'] = $a_backend[$id]['retries']; $pconfig['type'] = $a_backend[$id]['type']; $pconfig['balance'] = $a_backend[$id]['balance']; $pconfig['monitor_uri'] = $a_backend[$id]['monitor_uri']; $pconfig['stats_enabled'] = $a_backend[$id]['stats_enabled']; $pconfig['stats_username'] = $a_backend[$id]['stats_username']; $pconfig['stats_password'] = $a_backend[$id]['stats_password']; $pconfig['stats_uri'] = $a_backend[$id]['stats_uri']; $pconfig['stats_realm'] = $a_backend[$id]['stats_realm']; $pconfig['type'] = $a_backend[$id]['type']; $pconfig['extaddr'] = $a_backend[$id]['extaddr']; $pconfig['max_connections'] = $a_backend[$id]['max_connections']; $pconfig['client_timeout'] = $a_backend[$id]['client_timeout']; $pconfig['stats_enabled'] = $a_backend[$id]['stats_enabled']; $pconfig['stats_realm'] = $a_backend[$id]['stats_realm']; $pconfig['stats_uri'] = $a_backend[$id]['stats_uri']; $pconfig['stats_username'] = $a_backend[$id]['stats_username']; $pconfig['stats_password'] = $a_backend[$id]['stats_password']; $pconfig['port'] = $a_backend[$id]['port']; $pconfig['a_acl']=&$a_backend[$id]['ha_acls']['item']; } $changedesc = "Services: HAProxy: Backends"; $changecount = 0; if ($_POST) { $changecount++; unset($input_errors); $pconfig = $_POST; if ($_POST['stats_enabled']) { $reqdfields = explode(" ", "name connection_timeout server_timeout retries stats_username stats_password stats_uri stats_realm"); $reqdfieldsn = explode(",", "Name,Connection timeout,Server timeout,Retries,Stats Username,Stats Password,Stats Uri,Stats Realm"); } else { $reqdfields = explode(" ", "name connection_timeout server_timeout retries monitor_uri"); $reqdfieldsn = explode(",", "Name,Connection timeout,Server timeout,Retries,Monitor Uri"); } do_input_validation($_POST, $reqdfields, $reqdfieldsn, &$input_errors); $reqdfields = explode(" ", "name type port max_connections client_timeout"); $reqdfieldsn = explode(",", "Name,Type,Port,Max connections,Client timeout"); do_input_validation($_POST, $reqdfields, $reqdfieldsn, &$input_errors); if (preg_match("/[^a-zA-Z0-9\.\-_]/", $_POST['name'])) $input_errors[] = "The field 'Name' contains invalid characters."; if (!is_numeric($_POST['connection_timeout'])) $input_errors[] = "The field 'Connection timeout' value is not a number."; if (!is_numeric($_POST['server_timeout'])) $input_errors[] = "The field 'Server timeout' value is not a number."; if (!is_numeric($_POST['retries'])) $input_errors[] = "The field 'Retries' value is not a number."; if (preg_match("/[^a-zA-Z0-9\.\-_]/", $_POST['stats_username'])) $input_errors[] = "The field 'Stats Username' contains invalid characters."; if (preg_match("/[^a-zA-Z0-9\.\-_]/", $_POST['stats_password'])) $input_errors[] = "The field 'Stats Password' contains invalid characters."; if (!is_numeric($_POST['max_connections'])) $input_errors[] = "The field 'Max connections' value is not a number."; if (!is_numeric($_POST['port'])) $input_errors[] = "The field 'Port' value is not a number."; if (!is_numeric($_POST['client_timeout'])) $input_errors[] = "The field 'Client timeout' value is not a number."; /* Ensure that our pool names are unique */ for ($i=0; isset($config['installedpackages']['haproxy']['ha_backends']['item'][$i]); $i++) if (($_POST['name'] == $config['installedpackages']['haproxy']['ha_backends']['item'][$i]['name']) && ($i != $id)) $input_errors[] = "This backend name has already been used. Backend names must be unique."; $a_acl=array(); $acl_names=array(); for($x=0; $x<99; $x++) { $acl_name=$_POST['acl_name'.$x]; $acl_expression=$_POST['acl_expression'.$x]; if ($acl_name) { // check for duplicates if (in_array($acl_name, $acl_names)) { $input_errors[] = "The name '$acl_name' is duplicate."; } $acl_names[]=$acl_name; $acl=array(); $acl['name']=$acl_name; $acl['expression']=$acl_expression; $a_acl[]=$acl; if (preg_match("/[^a-zA-Z0-9\.\-_]/", $acl_name)) $input_errors[] = "The field 'Name' contains invalid characters."; if (!preg_match("/.{2,}/", $acl_expression)) $input_errors[] = "The field 'Expression' is required."; if (!preg_match("/.{2,}/", $acl_name)) $input_errors[] = "The field 'Name' is required."; } } $pconfig['a_acl']=$a_acl; if (!$input_errors) { $backend = array(); if(isset($id) && $a_backend[$id]) $backend = $a_backend[$id]; if($backend['name'] != "") $changedesc .= " modified '{$backend['name']}' pool:"; if ($backend['name']!=$_POST['name']) { // name changed: // * update servers // * update frontend (default backend and acl) if (!is_array($config['installedpackages']['haproxy']['ha_servers']['item'])) { $config['installedpackages']['haproxy']['ha_servers']['item'] = array(); } $a_server = &$config['installedpackages']['haproxy']['ha_servers']['item']; for ( $i = 0; $i < count($a_server); $i++) { if ($a_server[$i]['backend']==$backend['name']) { $a_server[$i]['backend']=$_POST['name']; } } if (!is_array($config['installedpackages']['haproxy']['ha_frontends']['item'])) { $config['installedpackages']['haproxy']['ha_frontends']['item'] = array(); } $a_frontend = &$config['installedpackages']['haproxy']['ha_frontends']['item']; for ( $i = 0; $i < count($a_frontend); $i++) { if ($a_frontend[$i]['backend']==$backend['name']) { $a_frontend[$i]['backend']=$_POST['name']; } if (!is_array($a_frontend[$i]['ha_acls']['item'])) { $a_frontend[$i]['ha_acls']['item'] = array(); } $a_acl = &$a_frontend[$i]['ha_acls']['item']; for ( $j = 0; $j < count($a_acl); $j++) { if ($a_acl[$j]['backend']==$backend['name']) { $a_acl[$j]['backend']=$_POST['name']; } } } } update_if_changed("name", $backend['name'], $_POST['name']); update_if_changed("description", $backend['desc'], $_POST['desc']); update_if_changed("connection_timeout", $backend['connection_timeout'], $_POST['connection_timeout']); update_if_changed("server_timeout", $backend['server_timeout'], $_POST['server_timeout']); update_if_changed("retries", $backend['retries'], $_POST['retries']); update_if_changed("type", $backend['type'], $_POST['type']); update_if_changed("balance", $backend['balance'], $_POST['balance']); update_if_changed("cookie_name", $backend['cookie_name'], $_POST['cookie_name']); update_if_changed("monitor_uri", $backend['monitor_uri'], $_POST['monitor_uri']); update_if_changed("stats_enabled", $backend['stats_enabled'], $_POST['stats_enabled']); update_if_changed("stats_username", $backend['stats_username'], $_POST['stats_username']); update_if_changed("stats_password", $backend['stats_password'], $_POST['stats_password']); update_if_changed("stats_uri", $backend['stats_uri'], $_POST['stats_uri']); update_if_changed("stats_realm", $backend['stats_realm'], $_POST['stats_realm']); update_if_changed("type", $backend['type'], $_POST['type']); update_if_changed("port", $backend['port'], $_POST['port']); update_if_changed("extaddr", $backend['extaddr'], $_POST['extaddr']); update_if_changed("max_connections", $backend['max_connections'], $_POST['max_connections']); update_if_changed("client_timeout", $backend['client_timeout'], $_POST['client_timeout']); $backend['ha_acls']['item']=$a_acl; if (isset($id) && $a_backend[$id]) { $a_backend[$id] = $backend; } else { $a_backend[] = $backend; } if ($changecount > 0) { touch($d_haproxyconfdirty_path); write_config($changedesc); } header("Location: haproxy_backends.php"); exit; } } $pfSversion = str_replace("\n", "", file_get_contents("/etc/version")); if(strstr($pfSversion, "1.2")) $one_two = true; $pgtitle = "HAProxy: Backend: Edit"; include("head.inc"); ?>

> > > > */ ?>
 
Edit haproxy backend
Name size="25" maxlength="25">
Description size="64">
Connection timeout size="64">
the time (in milliseconds) we give up if the connection does not complete within (30000).
Server timeout size="64">
the time (in milliseconds) we accept to wait for data from the server, or for the server to accept data (30000).
Retries size="64">
After a connection failure to a server, it is possible to retry, potentially on another server. This is useful if health-checks are too rare and you don't want the clients to see the failures. The number of attempts to reconnect is set by the 'retries' parameter (2).
Type
Balance
>Round robin Each server is used in turns, according to their weights. This is the smoothest and fairest algorithm when the server's processing time remains equally distributed. This algorithm is dynamic, which means that server weights may be adjusted on the fly for slow starts for instance.
>Source The source IP address is hashed and divided by the total weight of the running servers to designate which server will receive the request. This ensures that the same client IP address will always reach the same server as long as no server goes down or up. If the hash result changes due to the number of running servers changing, many clients will be directed to a different server. This algorithm is generally used in TCP mode where no cookie may be inserted. It may also be used on the Internet to provide a best-effort stickyness to clients which refuse session cookies. This algorithm is static, which means that changing a server's weight on the fly will have no effect.
Stats Enabled onclick='toggle_stats();'>
EXAMPLE: haproxystats
Stats Realm size="64">
Stats Uri size="64">
EXAMPLE: /haproxy?stats
Stats Username size="64">
Stats Password size="64">
Monitor Uri size="50" maxlength="50">
Example: / or /index.php or /index.html or /testmypage.cgi
Port size="10" maxlength="10">
the port to listen to
External address
If you want this rule to apply to another IP address than the IP address of the interface chosen above, select it here (you need to define Virtual IP addresses on the first). Also note that if you are trying to redirect connections on the LAN select the "any" option.
Max connections size="10" maxlength="10">
Client timeout size="10" maxlength="10">
the time (in milliseconds) we accept to wait for data from the client, or for the client to accept data (30000).
Access Control lists
Name Expression Backend

Fore more information about ACL's please see HAProxy Documentation Section 7 - Using ACL's
 
NOTE: You must add a firewall rule permitting access to this backend!