As part of Ambari 2.0, Ambari includes built-in systems for alerting and metrics collection. Therefore, when upgrading to Ambari 2.0, the legacy Nagios and Ganglia services must be removed and replaced with the new systems.
![[Important]](../common/images/admon/important.png) | Important |
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We highly recommended that you perform and validate this procedure in a test environment prior to attempting the Ambari upgrade on production systems. |
