Example proxy_balancer in front of Redmine server

This is a working example of mod_proxy_balancer configuration in front of Redmine http server (puma thin ot something else).

# $Id: httpd-proxy-mongrel.conf 661 2013-09-14 13:38:10Z imc $
# Redmine configuration behind Apache 2.4.x and mongrel/thin/puma…

# Loading mod_lbmethod_byrequests, mod_proxy, mod_proxy_http and mod_proxy_balancer

# If other load balancing scheduler algorithm is needed other modules could be loaded too: mod_lbmethod_bytraffic,
# mod_lbmethod_bybusyness and mod_lbmethod_heartbeat. All of these can be loaded and then one of the algorithm
# could be selected by ProxySet directive.

<IfModule !mod_lbmethod_byrequests.c>
LoadModule lbmethod_byrequests_module lib/modules/mod_lbmethod_byrequests.so
<IfModule !mod_proxy.c>
LoadModule proxy_module lib/modules/mod_proxy.so
<IfModule !mod_proxy_http.c>
LoadModule proxy_http_module lib/modules/mod_proxy_http.so
<IfModule !mod_proxy_balancer.c>
LoadModule proxy_balancer_module lib/modules/mod_proxy_balancer.so

<Directory E:/data/redmine/public/>
Options Indexes FollowSymLinks MultiViews
AllowOverride All
Require ip 192.168.20

<Proxy *>
Require ip 192.168.20

ProxyPass / balancer://redmine_cluster/
ProxyPassReverse / balancer://redmine_cluster/

<Proxy balancer://redmine_cluster>
BalancerMember http://redmine.mycompany.com:3001
BalancerMember http://redmine.mycompany.com:3002
BalancerMember http://redmine.mycompany.com:3003
ProxySet lbmethod=byrequests


Redmine plugins that work in Redmine 2.2.2.stable


Clipboard image paste
Paste cropped image from clipboard as attachment
Richard Pecl 1.2
Redmine Apijs plugin
Integrate the apijs javascript library into Redmine. https://redmine.luigifab.info/projects/redmine/wiki/apijs
Fabrice Creuzot 4.0.0
Redmine Code Review plugin
This is a Code Review plugin for Redmine http://www.r-labs.org/projects/show/codereview
Haruyuki Iida 0.6.1
Did You Mean?
A plugin to search for duplicate issues before opening them. http://www.github.com/abahgat/redmine_didyoumean
Alessandro Bahgat and Mattia Tommasone 1.2.0
Redmine Favourite Projects plugin
This is a plugin for Redmine to provide a list of favourite projects on My Page, Top Menu or Project Jumplist https://github.com/syntacticvexation/redmine_favourite_projects
Syntactic Vexation 0.6
Redmine Information Plugin
This is a plugin for information of Redmine http://www.r-labs.org/projects/rp-admin-reports/wiki/Redmine_Information_Plugin
M. Yoshida 1.0.2
Redmine Issue Checklist plugin
This is a issue checklist plugin for Redmine http://redminecrm.com
Kirill Bezrukov 2.0.5
Redmine Local Avatars plugin
This plugin lets users upload avatars directly into Redmine
Andrew Chaika and Luca Pireddu 0.1.1
Redmine Pastebin plugin
A real pastebin plugin for redmine https://github.com/commandprompt/redmine_pastebin/
Alex Shulgin <ash@commandprompt.com> 0.2.0
Redmine plugin views revisions plugin
This plugin tries to solve problem that is caused by inability to monkey-patch views in the Redmine. For details please see http://www.redmine.org/plugins/redmine_plugin_views_revisions for more details
Vitaly Klimov 0.0.1
Redmine Theme Changer plugin
Lets each user select a theme for Redmine http://www.r-labs.org/projects/themechanger
Haruyuki Iida 0.1.0
Redmine User Issues
Shows the assigned issues on the user page https://github.com/klausmeyer/redmine_user_issues
Klaus Meyer 0.0.2
Redmine Wiki Gchart LaTeX-style Formula plugin
This plugin enables Redmine to render LaTeX-style formula images in Wiki. https://github.com/masamitsu-murase/redmine_wiki_gchart_formula/
Masamitsu MURASE 0.0.5
Issues XLS export
Export issues to XLS files including journals, descriptions, etc. This plugin requires spreadsheet gem.
Vitaly Klimov 0.2.1
Wiki Next Generation plugin extends Redmine Wiki syntax. http://projects.andriylesyuk.com/projects/wiking
Andriy Lesyuk 0.0.3

Installation guide of Redmine on Windows system

This instruction describes Redmine installation on Windows system in the following configuration:

  • Redmine 1.3.0+
  • Ruby 1.8.7 p302
  • Ruby on Rails 2.3.14 -> Mongrel 1.1.5 -> Apache 2.2.x+ with proxy_balancer_module
  • MySQL 5.1.x
  • Domain: redmine.mycompany.com as Apache virtual host
  • Redmine root folder (directory): %REDMINE_ROOT% = e:\data\redmine
  • Folder where virtual hosts definitions reside: %VHOSTS_DIR% = e:\data\vhosts
  • Folder where logs are written: %LOGDIR% = e:\data\log

A. Prerequisites.

A.1. Installation of Ruby interpreter.

Ruby 1.8.7 should be used currently. This is applicable for Redmine 1.3.x. It seems that Redmine 1.4.x will be compatible with Ruby 1.9.2 but it is in the future yet.

Download link: http://rubyforge.org/frs/download.php/72085/rubyinstaller-1.8.7-p302.exe

This is an usual Windows setup wizard installer. Ruby executable path must be put in PATH= system variable. The related option should be set in the wizard dialog.

A submenu Ruby 1.8.7-p302 will appear in start menu.  Run ‘Interactive Ruby’ command from there. This way you will see if Ruby is installed properly.

A.2 RubyGems installation.

Execute gem command in a console window. If it does not proceed (file or command not found error) do the following:

Download http://rubyforge.org/frs/download.php/70697/rubygems-1.3.7.zip. Unzip the archive in a temporary folder, go there and execute ruby setup.rb in a console.

A.3 Ruby on Rails installation.

Execute the command:

gem install rails -v=2.3.14

Redmine 1.3.0 requires Rails 2.3.14, no any older.

A.4 Install rack.

Execute the command:

gem install rack -v=1.1.1 or
gem install rack -v=1.1.2

B. Redmine installation.

B.1 Redmine application.

Download Redmine from http://rubyforge.org/frs/?group_id=1850.

Unzip the archive in %REDMINE_ROOT%.

B2. MySQL database.

Create database:

create database redmine;
create user 'redmine'@'localhost' identified by 'redminepassword';
grant all privileges on redmine.* to 'redmine'@'localhost';

Copy %REDMINE_ROOT%\config\database.yml.example to %REDMINE_ROOT%\config\database.yml and edit it in the production section.

  adapter: mysql
  database: redmine
  host: localhost
  username: redmine
  password: redminepassword
  encoding: utf-8

Go to %REDMINE_ROOT% and execute

rake generate_session_store

Install mysql gem:

gem install mysql


set RAILS_ENV=production
rake db:migrate
rake redmine:load_default_data

The second command may fail. If this happens download http://instantrails.rubyforge.org/svn/trunk/InstantRails-win/InstantRails/mysql/bin/libmySQL.dll and put it in the bin folder of Ruby installation, this way replacing the defective libmysql.dll. Then execute second command again and then third one.

B.3. Test.

The basic installation should be finished at this point. Go to %REDMINE_ROOT% and execute

ruby script\server –e production

In Firefox or MSIE, go to http://localhost:3000. You should see the main page of Redmine. You may log in with username admin and password admin.

Log in and create second user with administrative rights.

Stop Redmine and continue with installation.

B.4. Redmine mail service (SMTP server Configuration).

Open %REDMINE_ROOT%\config\configuration.yml and edit the email configuration in the production section.

 # Outgoing emails configuration (see examples above)
   delivery_method: :smtp
     address: "your.mail.server"
     port: 25
     domain: "your.domain"

The configuration depends on the actual requirements of your mail server and may differ from the above example. You should restart Redmine so as the configuration take effect.

Play for a while with settings in Administration panel and test if Redmine is able to send emails to you (the administrator).

C. Mongrel.

C.1. Mongrel gem.

The site of mongrel is http://rubyforge.org/projects/mongrel/.


gem install mongrel

The expected result is

Successfully installed gem_plugin-0.2.3
Successfully installed cgi_multipart_eof_fix-2.5.0
Successfully installed mongrel-1.1.5-x86-mingw32

C.2. Virtual host redmine.mycompany.com.

The definition of the virtual host is

<VirtualHost *:80>
    ServerName redmine.mycompany.com
    ServerAdmin admin@mycompany.com
    DocumentRoot e:/data/redmine/public              # %REDMINE_ROOT%/public
    DirectoryIndex index.html index.php
    Include e:/data/vhosts/httpd-proxy-mongrel.conf  # %VHOSTS_DIR%/httpd-proxy-mongrel.conf
    ErrorLog e:/data/log/redmine.error.log           # %LOGDIR%/redmine.error.log
    TransferLog e:/data/log/redmine.transfer.log     # %LOGDIR%/redmine.transfer.log
    AddDefaultCharset WINDOWS-1251                   # these two lines are optional
    AddCharset WINDOWS-1251 .cp-1251 .win-1251

This file must be included in Apache’s httpd.conf file in the section where virtual hosts are defined. Note that there is an Include directive for httpd-proxy-mongrel.conf in above definition. This file should be visible by Apache.

Contents of httpd_proxy_mongrel.conf:

# Redmine configuration behind Apache 2.2.x and mongrel
# Loading mod_proxy, mod_proxy_http and mod_proxy_balancer
<IfModule !mod_proxy.c>
    LoadModule proxy_module lib/modules/mod_proxy.so
<IfModule !mod_proxy_http.c>
    LoadModule proxy_http_module lib/modules/mod_proxy_http.so
<IfModule !mod_proxy_balancer.c>
    LoadModule proxy_balancer_module lib/modules/mod_proxy_balancer.so
<Directory E:/data/redmine/public/>           # %REDMINE_ROOT%/public/
    Options Indexes FollowSymLinks MultiViews
    AllowOverride All
    Order deny,allow
    Deny from all
    Allow from 192.168.20
<Proxy *>
    Order Deny,Allow
    Deny from all
    Allow from 192.168.20
ProxyPass / balancer://redmine_cluster/
ProxyPassReverse / balancer://redmine_cluster/
<Proxy balancer://redmine_cluster>
    BalancerMember http://redmine.mycompany.com:3001
    BalancerMember http://redmine.mycompany.com:3002
    BalancerMember http://redmine.mycompany.com:3003

Note ports 3001, 3002, 3003 above. These ports should be the same in C.3 in the commands that install Mongrel services.

The file mongrel.rb is copied into %REDMINE_ROOT%\config\initializers\. This file is needed because Mongrel_rails service „–prefix“ does not work with Rails 2.3.x.

mongrel.rb may be downloaded from http://www.redmine.org/attachments/6901/mongrel.rb

Contents of mongrel.rb:

if ['2.3.8', '2.3.9', '2.3.10', '2.3.11', '2.3.12', '2.3.14'].include?(Rails.version) && Gem.available?('mongrel', '~>1.1.5') && self.class.const_defined?(:Mongrel)

  # Pulled right from latest rack. Old looked like this in 1.1.0 version.
  # def [](k)
  #   super(@names[k] ||= @names[k.downcase])
  # end
  module Rack
    module Utils
      class HeaderHash < Hash
        def [](k)
          super(@names[k]) if @names[k]

  # Code pulled from the ticket above.
  class Mongrel::CGIWrapper
    def header_with_rails_fix(options = 'text/html')
      @head['cookie'] = options.delete('cookie').flatten.map { |v| v.sub(/^\n/,'') } if options.class != String and options['cookie']
    alias_method_chain :header, :rails_fix

  # Pulled right from 2.3.8 ActionPack. Simple diff was
  # if headers.include?('Set-Cookie')
  #   headers['cookie'] = headers.delete('Set-Cookie').split("\n")
  # end
  # to
  # if headers['Set-Cookie']
  #   headers['cookie'] = headers.delete('Set-Cookie').split("\n")
  # end
  module ActionController
    class CGIHandler
      def self.dispatch_cgi(app, cgi, out = $stdout)
        env = cgi.__send__(:env_table)
        env.delete "HTTP_CONTENT_LENGTH"
        cgi.stdinput.extend ProperStream
        env["SCRIPT_NAME"] = "" if env["SCRIPT_NAME"] == "/"
          "rack.version" => [0,1],
          "rack.input" => cgi.stdinput,
          "rack.errors" => $stderr,
          "rack.multithread" => false,
          "rack.multiprocess" => true,
          "rack.run_once" => false,
          "rack.url_scheme" => ["yes", "on", "1"].include?(env["HTTPS"]) ? "https" : "http"
        env["QUERY_STRING"] ||= ""
        env["HTTP_VERSION"] ||= env["SERVER_PROTOCOL"]
        env["REQUEST_PATH"] ||= "/"
        env.delete "PATH_INFO" if env["PATH_INFO"] == ""
        status, headers, body = app.call(env)
          out.binmode if out.respond_to?(:binmode)
          out.sync = false if out.respond_to?(:sync=)
          headers['Status'] = status.to_s
          if headers['Set-Cookie']
            headers['cookie'] = headers.delete('Set-Cookie').split("\n")
          body.each { |part|
            out.write part
            out.flush if out.respond_to?(:flush)
          body.close if body.respond_to?(:close)

The following line is added at the end of %REDMINE_ROOT%\redmine\config\environment.rb:

Redmine::Utils::relative_url_root = ""

C.3 Mongrel service.

Download win32-service version 0.5.2 from http://rubyforge.org/frs/?group_id=1306.

Download mongrel_service-0.3.4-i386-mswin32.gem from http://files.ruby.inoack.com/win32utils/

Put these files in some folder and execute in it

gem install mongrel_service

The expected result is

Successfully installed win32-service-0.5.2-x86-mswin32
Successfully installed mongrel_service-0.3.4-x86-mswin32
2 gems installed

Install Windows services:

mongrel_rails service::install -N mongrel_redmine_3001 -D "Mongrel serving Redmine on 3001" -p 3001 -e production -c e:\data\Redmine
mongrel_rails service::install -N mongrel_redmine_3002 -D "Mongrel serving Redmine on 3002" -p 3002 -e production -c e:\data\Redmine
mongrel_rails service::install -N mongrel_redmine_3003 -D "Mongrel serving Redmine on 3003" -p 3003 -e production -c e:\data\Redmine

Start services in Windows Control panel. Restart Apache.

In a browser, go to http://redmine.mycompany.com.



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