Configuring Horizon caching with memcached

To better address large-scale environments while using the Horizon dashboard service, with a large amount of users, it is recommended to configure a caching layer in front of the dashboard. This reduces the amount of calls httpd needs to address and allows Horizon dashboard to serve a larger amount of users.

Getting started

In this recipe, we will configure Horizon to use a memcached caching service. We will need to install and configure the memcached service first.

Install the memcached service with dependent packages:

[root@controller ~]# yum install -y memcached memcached-selinux

Edit the memcached configuration file:

[root@controller ~]# vi /etc/sysconfig/memcached

Make sure that the following settings are done:

PORT="11211"
USER="memcached"
OPTIONS="-l 127.0.0.1"

Enable and start the memcached service:

[root@controller ~]# systemctl enable memcached
[root@controller ~]# systemctl start memcached

Test if memcached is running and functional as follows...