Kamalika,
The UCCX 8.5 installation/upgrade guide as well as the administration guide shows all of the examples that you have requested. You can access them off the CCO site. To add to the cluster, you will use the install/upgrade guide. To remove, use the admin guide to use the section "changeing a cluster." Hopefully this will help.
Regards.
Robert W. Rogier
CSE - TAC UCC
Robert W. Rogier
Technical Consulting Engineer – Contact Center Enterprise
E2E Lead | Subject Matter Expert – ECE, CCMP, CCDM
Phone: +1 919 574 5993
Email: rorogier@cisco.com
Business Hours: 8AM to 5PM ET