Download cluster blueprints

Ensure you download the cluster blueprints before you begin the upgrade.

To download the cluster blueprints with hosts, do the following:

curl ${securecurl} -H "X-Requested-By: ambari" -X GET -u ${ambariuser}:${ambaripwd} ${ambariprotocol}://${ambariserver}:${ambariport}/api/v1/clusters/${clustername}?format=blueprint_with_hosts > "${backupdir}"/${clustername}_blueprint_with_hosts_"$(date +"%Y%m%d%H%M%S")".json

To download the cluster blueprints without hosts, do the following:
```
curl ${securecurl} -H "X-Requested-By: ambari" -X GET -u ${ambariuser}:${ambaripwd} ${ambariprotocol}://${ambariserver}:${ambariport}/api/v1/clusters/${clustername}?format=blueprint > "${backupdir}"/${clustername}_blueprint_without_hosts_"$(date +"%Y%m%d%H%M%S")".json
```
where,
securecurl = -k for https
securecurl = -k for https
ambariuser = Ambari User Name
ambaripwd = Ambari Password
ambariprotocol = http or https
ambariserver = Ambari Server Name
ambariport = Ambari Port
clustername = The Name of the cluster
backupdir = The folder to download the blueprint