Creatio administration
This documentation is valid for Creatio version 7.13.0. We recommend using the newest version of Creatio documentation.

HAProxy balancer setup

To set up HAProxy, modify the haproxy.cfg file. You can find the file under the following path:

.../etc/haproxy/haproxy.cfg

Primary setup (required)

Add frontend and backend sections necessary for HAProxy operation.

The frontend section

Add bind and default_backend settings to the frontend section.

  • In the bind setting, specify the address and the port that will receive requests distributed by HAProxy.

  • In the default_backend section, specify the name that will match the name of the backend section.

As a result, the setup will look as follows:

frontend frontend_example
         bind *:80
         default_backend backend_example

The backend section

Add 2 required setting to the backend section:

  • In the balance parameter, specify the type of balancing, e.g., leastconn. More information about different types of balancing is available in HAProxy documentation.

  • Use the server parameter to specify all servers (or “nodes”) for distributing the load.

Add a separate “server” parameter for each server (i.e. the deployed bpm’online application instance) and specify the server and port addresses. For example, if you need to distribute the load between 2 bpm’online application servers, add 2 “server” parameters to backend:

server node_1 [server address]:[port]
server node_2 [server address]:[port]

As a result, the setup will look as follows:

backend backend_example
         balance leastconn
            
         #nodes for balance
         server node_1 10.0.14.155:91
         server node_2 10.0.15.107:92

The new settings will be applied as soon as you restart HAProxy. To restart HAProxy, use the following command:

service haproxy restart

web Statistics setup (optional)

To enable web-statistics, add a new “listen” section with the following parameters: bind, mode http, stats enable, stats uri. The syntax is as follows:

listen stats # Define a listen section called "stats"
         bind :9000 # Listen on localhost:9000
         mode http
         stats enable  # Enable stats page
         stats uri /haproxy_stats  # Stats URI

As a result, the web-statistics of bpm’online load balancing will be available for viewing in the browser.

Fig. 1 Example of a load balancer web-statistics

load_balancer_stats.png 

To view the statistics, follow the path: [balancer address]:9000/haproxy_stats.

 

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