How to Migrate the cloudbees Jenkins Enterprise analytics to set our own Elasticsearch Analytics



We our jenkins environment running with elaticsearch which configured by cloudbees analytics and we are planning to set up our own elasticsearch set up for our Jenkins environment. Refer to this article(
Since we have ES running, we would like to migrate the current ES analytics from CJE default to own Analytics.
Our ES details are below:

curl -u id:pwd https://ourjenkinswebsite/elasticsearch give the following.

"status" : 200,
"name" : "Fin",
"cluster_name" : "elasticsearch",
"version" : {
"number" : "1.7.3",
"build_hash" : "05d4530971ef0ea46d0f4fa6ee64dbc8df659682",
"build_timestamp" : "2015-10-15T09:14:17Z",
"build_snapshot" : false,
"lucene_version" : "4.10.4"
"tagline" : "You Know, for Search"

We would like to know how to migrate and what are the steps we need to follow.
our first step would to upgrade the ES to 2.X. can you help us how to do it? or Please let us know what are steps we need to follow to complete this set up.