26. Upgrade Apache Ranger

Ranger is the new name for XASecure, an HDP 2.1 add-on product.

Backup the following config directories:
```
xapolicymgr config (from /usr/lib/xapolicymgr)
uxugsync config (from /usr/lib/uxugsync)
agents config (/etc/hadoop/conf, /etc/hive/conf, /etc/hbase/conf)
```
Backup Apache Ranger policy/audit databases. For example:
mysqldump xasecure > /tmp/xasecure/backup_xasecure.sql
Note
The DB host and xaadmin and xalogger user details are important to note because you must specify the same database details when installing the HDP 2.2 version of Ranger.
Stop services.
- Stop Policy Admin
  service xapolicymgr stop
- Stop user sync.
  service uxugsync stop
- Stop other HDP Services.

	Note
The DB host and xaadmin and xalogger user details are important to note because you must specify the same database details when installing the HDP 2.2 version of Ranger.

Cleanup startup files/symbolic links

rm -f /etc/init.d/xapolicymgr
rm -rf /etc/rc*.d/*xapolicymgr
rm -f /etc/init.d/uxugsync
rm -rf /etc/rc*.d/*uxugsync
rm -f /usr/lib/xapolicymgr
rm -f /usr/lib/uxugsync

Follow the Ranger Install instructions for HDP 2.2 to install the following Ranger components: Ranger-Admin Ranger-UserSync (Plugins for HDFS, HBase, Hive, Knox and Storm as required.)
Restart Ranger Services
service ranger-admin start
service ranger-usersync start

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