[noSQL] Installing cluster Apache CouchDB with BigCouch on Ubuntu server

BigCouch is an open source, highly available, fault-tolerant, clustered & API-compliant version of Apache CouchDB.
BigCouch allows users to create clusters of CouchDBs that are distributed over an arbitrary number of servers. While it appears to the end-user as one CouchDB instance, it is in fact one or more nodes in an elastic cluster, acting in concert to store and retrieve documents, index and serve views, and serve CouchApps.
In this document, I setup on bigcouch-ckl001.local and bigcouch-ckl002.local (nslookup completed)