PHP code example of malc0mn / haproxy-config-builder

    
        
<?php
require_once('vendor/autoload.php');

/* Start to develop here. Best regards https://php-download.com/ */

    

malc0mn / haproxy-config-builder example snippets

use HAProxy\Config\Comment;
use HAProxy\Config\Proxy\Backend;
use HAProxy\Config\Proxy\Frontend;
use HAProxy\Config\Proxy\Listen;
use HAProxy\Config\Userlist;
use HAProxy\Config\Config;

$comment = <<<TEXT
Simple configuration for an HTTP proxy listening on port 80 on all
interfaces and forwarding requests to a single backend "servers" with a
single server "server1" listening on 127.0.0.1:8000
TEXT;

$config = Config::create()
    ->addComment(
        new Comment($comment)
    )
    ->setDebug()
    ->setDaemon()
    ->addGlobal('maxconn', 256)
    ->addDefaults('mode', 'http')
    ->addDefaults('timeout', ['connect', '5000ms'])
    ->addDefaults('timeout', ['client', '50000ms'])
    ->addDefaults('timeout', ['server', '50000ms'])
    ->addUserlist(
        Userlist::create('developers')
            ->addUser('eddy', '$6$mlskxjmqlkcnmlcjsmdl', ['editor', 'admin'])
            ->addGroup('editor', [])
    )
    ->addFrontend(
        Frontend::create('http-in')
            ->bind('*', 80)
            ->addParameter('default_backend', 'servers')
            ->addAcl('login_page', ['url_beg', '/login'])
    )
    ->addBackend(
        Backend::create('servers')
            ->addServer('server1', '127.0.0.1', 8000, ['maxconn', 32])
    )
    ->addListen(
        Listen::create('ssh')
            ->addServer('ssh-host', '*', 22, 'maxconn 3')
    )
;

echo (string)$config;

use HAProxy\Config\Config;

$configFromFile = Config::fromFile('/etc/haproxy/haproxy.conf');

var_export($configFromFile);

HAProxy\Config\Proxy\Frontend;

$frontend = Frontend::create('www_frontend')
    ->addParameter('mode', 'http')
    ->addParameter('default_backend', 'www_backend')
    ->bind('*', 80)
    ->addAcl('is_https', 'hdr(X-Forwarded-Proto) -i https')
    ->addAcl('is_host_com', 'hdr(Host) -i example.com')
    ->addUseBackend('host_com', 'if is_host_com')
    ->addParameter('option', 'forwardfor')
;

echo (string)$frontend;
/*
 frontend www_frontend
 mode            http
 default_backend www_backend
 bind            *:80
 acl             is_https hdr(X-Forwarded-Proto) -i https
 acl             is_host_com hdr(Host) -i example.com
 use_backend     host_com if is_host_com
 option          forwardfor
 */

$frontend->setParameterOrder(['bind', 'mode', 'option', 'acl', 'use_backend', 'default_backend']);

echo (string)$frontend;
/*
 frontend www_frontend
 bind            *:80
 mode            http
 option          forwardfor
 acl             is_https hdr(X-Forwarded-Proto) -i https
 acl             is_host_com hdr(Host) -i example.com
 use_backend     host_com if is_host_com
 default_backend www_backend
 */

// Whitespace control:
$frontend->setParameterOrder([
    'bind' => false,
    'mode' => false,
    'option' => true, // Add trailing whitespace!
    'acl' => true, // Add trailing whitespace!
    'use_backend' => true, // Add trailing whitespace!
    'default_backend',
]);

echo (string)$frontend;
/*
 frontend www_frontend
 bind            *:80
 mode            http
 option          forwardfor

 acl             is_https hdr(X-Forwarded-Proto) -i https
 acl             is_host_com hdr(Host) -i example.com

 use_backend     host_com if is_host_com

 default_backend www_backend
 */

use HAProxy\Config\Comment;
use HAProxy\Config\Proxy\Backend;
use HAProxy\Config\Proxy\Frontend;
use HAProxy\Config\Proxy\Listen;
use HAProxy\Config\Userlist;
use HAProxy\Config\Config;

$comment = <<<TEXT
Simple configuration for an HTTP proxy listening on port 80 on all
interfaces and forwarding requests to a single backend "servers" with a
single server "server1" listening on 127.0.0.1:8000
TEXT;

$config = Config::create()
    ->addComment(
        new Comment($comment)
    )
    ->setDebug()
    ->setDaemon()
    ->addGlobal('maxconn', 256)
    ->addDefaults('mode', 'http')
    ->addDefaults('timeout', ['connect', '5000ms'])
    ->addDefaults('timeout', ['client', '50000ms'])
    ->addDefaults('timeout', ['server', '50000ms'])
    ->addUserlist(
        Userlist::create('developers')
            ->addUser('eddy', '$6$mlskxjmqlkcnmlcjsmdl', ['editor', 'admin'])
            ->addGroup('editor', [])
    )
    ->addBackend(
        Backend::create('servers')
            ->addServer('server1', '127.0.0.1', 8000, ['maxconn', 32])
            ->setPrintPriority(1002)
    )
    ->addListen(
        Listen::create('ssh')
            ->addServer('ssh-host', '*', 22, 'maxconn 3')
    )
    ->addFrontend(
        Frontend::create('http-in')
            ->bind('*', 80)
            ->addParameter('default_backend', 'servers')
            ->addAcl('login_page', ['url_beg', '/login'])
            ->setPrintPriority(1001)
    )
;

echo (string)$config;
/*
 # Simple configuration for an HTTP proxy listening on port 80 on all
 # interfaces and forwarding requests to a single backend "servers" with a
 # single server "server1" listening on 127.0.0.1:8000
 global
     maxconn 256
     debug
     daemon

 defaults
     mode    http
     timeout connect 5000ms
     timeout client 50000ms
     timeout server 50000ms

 userlist developers
     group editor

     user eddy password $6$mlskxjmqlkcnmlcjsmdl groups editor,admin

 listen ssh
     server ssh-host *:22 maxconn 3

 frontend http-in
     bind            *:80
     default_backend servers
     acl             login_page url_beg /login

 backend servers
     server server1 127.0.0.1:8000 maxconn 32
 */

use HAProxy\Config\Config;

$config = Config::fromFile('/etc/haproxy/haproxy.conf');

if ($config->frontendExists('www') && !$config->backendExists('www')) {
   $config->removeFrontend('www');
}

if ($config->listenExists('ssh')) {
   // Do stuff here.
}

$frontend = Frontend::create('www_frontend')
    ->bind('*', 8080)
    ->addParameter('mode', 'http')

    ->addParameter('http-request', 'set-header X-Original-Path %[path]')

    ->addAcl('is_host_website', 'hdr(host) -i website.example.com')
    ->addAcl('is_host_api', 'hdr(host) -i api.example.com')

    ->addAcl('is_path_admin', 'hdr_beg(X-Original-Path) -i /admin')
    ->addAcl('is_path_api', 'hdr_beg(X-Original-Path) -i /api')

    // Here come the 'tagged' backends.
    ->addUseBackendWithConditions(
        'website',
        ['is_host_website', 'is_path_admin'],
        'if', // This is the condition, 'if' is the default.
        'path_acl' // This is the tag.
    )
    ->addUseBackendWithConditions(
        'api',
        ['is_host_website', 'is_path_api'],
        'if', // This is the condition, 'if' is the default.
        'path_acl' // This is the tag.
    )

    // The 'regular' backends.
    ->addUseBackendWithConditions('website', ['is_host_website'])
    ->addUseBackendWithConditions('api', ['is_host_api'])
;

echo (string)$frontend;
/*
frontend www_frontend
bind         *:8080
mode         http
http-request set-header X-Original-Path %[path]
acl          is_host_website hdr(host) -i website.example.com
acl          is_host_api hdr(host) -i api.example.com
acl          is_path_admin hdr_beg(X-Original-Path) -i /admin
acl          is_path_api hdr_beg(X-Original-Path) -i /api
use_backend  website if is_host_website is_path_admin
use_backend  api if is_host_website is_path_api
use_backend  website if is_host_website
use_backend  api if is_host_api
*/