HAProxy¶

Synopsis¶

HAProxy is a free, open source high availability solution, providing load balancing and proxy for TCP and HTTP-based applications by spreading requests across multiple servers. Has a reputation for being fast and efficient (in terms of processor and memory usage).

Help Command¶

This command helps to determine the usage of HAProxy module. The user will come to know about the different ways/format to execute this module. This command will guide the end user to know when and how the command to be used. Below given are the command and the screenshot of the same.

ptconfigure HAproxy help

The pictorial representation of the above command is listed below,

kevell@corp:/# ptconfigure HAProxy help

******************************


 This module provides installs HA Proxy Server

 HAProxy, ha-proxy, haproxy

       - install
       Installs HA Proxy Server
       example: ptconfigure haproxy install

       - configure
       Configure Load Balancing with HA Proxy Server
       example: ptconfigure haproxy configure

------------------------------
End Help
******************************

Installation¶

We can install HAProxy using distribution’s package manager. When the user needs to install HAproxy module in machine. The below given command will execute the process of installation.

ptconfigure HAproxy install

The pictorial representation of the above command is listed below,

kevell@corp:/# ptconfigure haproxy install
Install HA Proxy Server? (Y/N)
y
*******************************
*        Pharaoh Tools        *
*         HA Proxy Server!        *
*******************************
[Pharaoh Logging] Package haproxy from the Packager Apt is already installed, so not installing
HA Proxy Init script config file /etc/default/haproxy added
[Pharaoh Logging] Restarting haproxy service
[ALERT] 041/154050 (17460) : parsing [/etc/haproxy/haproxy.cfg:25] : unknown keyword '1' in 'defaults' section
[ALERT] 041/154050 (17460) : parsing [/etc/haproxy/haproxy.cfg:32] : unknown option 'tcp-check'.
[ALERT] 041/154050 (17460) : parsing [/etc/haproxy/haproxy.cfg:34] : unknown keyword 'tcp-check' in 'backend' section
[ALERT] 041/154050 (17460) : parsing [/etc/haproxy/haproxy.cfg:35] : unknown keyword 'tcp-check' in 'backend' section
[ALERT] 041/154050 (17460) : parsing [/etc/haproxy/haproxy.cfg:36] : unknown keyword 'tcp-check' in 'backend' section
[ALERT] 041/154050 (17460) : parsing [/etc/haproxy/haproxy.cfg:37] : unknown keyword 'tcp-check' in 'backend' section
[ALERT] 041/154050 (17460) : parsing [/etc/haproxy/haproxy.cfg:38] : unknown keyword 'tcp-check' in 'backend' section
[ALERT] 041/154050 (17460) : parsing [/etc/haproxy/haproxy.cfg:39] : unknown keyword 'tcp-check' in 'backend' section
[ALERT] 041/154050 (17460) : Error(s) found in configuration file : /etc/haproxy/haproxy.cfg
[ALERT] 041/154050 (17460) : Fatal errors found in configuration.
* Restarting haproxy haproxy
  ...fail!
... All done!
*******************************
Thanks for installing , visit www.pharaohtools.com for more
******************************


Single App Installer:
--------------------------------------------
HAProxy: Success
------------------------------
Installer Finished
******************************

Options¶

Parameters	Alternative Parameters	Options	Comments
ptconfigure HAProxy Install	HAProxy , ha-proxy, haproxy	Y	System starts installation process
ptconfigure HAProxy Install\|	HAProxy , ha-proxy, haproxy	N	System stops installation process

Configuration¶

This command helps in configuring the load balancing with HAproxy server. Once the below given command is executed the system provides you with the default value for each section, if there are any changes to be done, the user can provide the data.

ptconfigure HAproxy configure

The screenshot for the above command is listed below,

kevell@corp:/# ptconfigure haproxy configure

*******************************
*        Pharaoh Tools        *
*         HA Proxy Server!        *
*******************************

What is the environment name you want to balance load to?

PHP Notice:  Undefined index:  in /opt/ptconfigure/ptconfigure/src/Modules/HAProxy/Model/HAProxyConfigureUbuntu.php on line 102
PHP Notice:  Undefined index:  in /opt/ptconfigure/ptconfigure/src/Modules/HAProxy/Model/HAProxyConfigureUbuntu.php on line 102
PHP Warning:  Invalid argument supplied for foreach() in /opt/ptconfigure/ptconfigure/src/Modules/HAProxy/Model/HAProxyConfigureUbuntu.php on line 75
Set non-default value for global_log? Default is 127.0.0.1 local0 notice (Y/N)

Set non-default value for global_maxconn? Default is 20000 (Y/N)

Set non-default value for global_user? Default is haproxy (Y/N)

Set non-default value for global_group? Default is haproxy (Y/N)

Set non-default value for defaults_log? Default is global (Y/N)

Set non-default value for defaults_mode? Default is http (Y/N)

Set non-default value for defaults_option_string? Default is option dontlognull
   option redispatch (Y/N)

Set non-default value for defaults_retries? Default is 3 (Y/N)

Set non-default value for defaults_timeout_connect? Default is 5000 (Y/N)

Set non-default value for defaults_timeout_client? Default is 10000 (Y/N)

Set non-default value for defaults_timeout_server? Default is 10000 (Y/N)

Set non-default value for listen_appname? Default is appname (Y/N)

Set non-default value for listen_ip_port? Default is 0.0.0.0:80 (Y/N)

Set non-default value for listen_mode? Default is http (Y/N)

Set non-default value for listen_balance? Default is roundrobin (Y/N)

Set non-default value for listen_option_string? Default is option httpclose
   option forwardfor (Y/N)

Set non-default value for listen_server_string? Default is  (Y/N)

... All done!
*******************************
Thanks for installing , visit www.pharaohtools.com for more
******************************


Single App Installer:
--------------------------------------------
HA Proxy Server: Success
------------------------------
Installer Finished
******************************

Benefits¶

All applications access the cluster via one single IP. The topology of the database cluster masked behind HAProxy.
It is possible to add or remove database nodes without any changes to the applications.
Once the max number of database connections (in MySQL) reached, HAProxy queues additional new connections. This is a neat way of throttling database connection requests and achieves overload protection.