Reference Guide
Achieve high availability for Teradici devices
Wyse Management Suite uses the HAProxy hosted on the Ubuntu server 16.04.1 LTS to perform load balancing between the EMSDK
servers. HAProxy is a load balancer proxy that can also provide high availability based on how it is congured. It is a popular open source
software for TCP/HTTP Load Balancer, and proxy solution which runs on Linux operating system. The most common use is to improve the
performance and reliability of a server environment by distributing the workload across multiple servers.
The following points explains how to achieve high availability for Teradici devices using HAProxy on Linux operating system:
• There will be only one instance of Teradici server as part of high availability with Wyse Management Suite.
• Teradici device support requires installation of EMSDK. EMSDK is a software component provided by Teradici that is integrated into
Wyse Management Suite. Wyse Management Suite Installer installs EMSDK can be installed on Wyse Management Suite server or on a
separate server. You need minimum of two instances of EMSDK to support more than 5000 devices, and all EMSDK servers should be
on remote servers.
• Only one instance of EMSDK can be installer per server.
• Teradici Device support requires a PRO license.
• High availability of Teradici will be provided through HAProxy.
• If Teradici server goes down, device will reconnect automatically to the next available EMSDK server.
Install and congure HAProxy
HAProxy which is the load balancer for ThreadX 5x devices is congured on Ubuntu Linux version 16.04.1 with HAproxy version 1.6.
Do the following to install and congure HAProxy on Ubuntu Linux system:
1 Log in to Ubuntu system using the user credentials used during the installation of Ubuntu operating system.
2 Run the following commands to install HAProxy
sudo apt-get install software-properties-common
sudo add-apt-repository ppa:vbernat/haproxy-1.6
sudo apt-get update
sudo apt-get install haproxy
3 Run the following command to take backup of the original conguration:
sudo cp /etc/haproxy/haproxy.cfg /etc/haproxy/ haproxy.cfg.original
4 Edit the HAProxy conguration le in a suitable text editor by running the following commands:
sudo nano /etc/haproxy/haproxy.cfg
Add the following entries in the conguration le:
Global section: Maxconn <maximum number of connections>
Frontend tcp-in: bind :5172
Back end servers: server :5172
maxconn <maximum number of connections per Teradici device proxy server>
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