Installing Memcached

Install Memcached on the controller node.

1. Install the Memcached component.

   yum install memcached python3-memcached

2. Modify the /etc/sysconfig/memcached file.
   1. Open the /etc/sysconfig/memcached file.

      vi /etc/sysconfig/memcached 

   2. Press i to enter the insert mode and add the following content to OPTIONS:

      OPTIONS="-l 127.0.0.1,::1,controller"

   3. Press Esc to exit the insert mode. Type :wq! and press Enter to save the file and exit.
3. Start the Memcached service and configure it to start upon system startup.

   systemctl enable memcached.service 
   systemctl start memcached.service

4. Optional: After the Memcached service is started, view the service status as required.

   memcached-tool controller stats