I want to customize my cluster
Recommended steps
Cluster can be customized using the following methods:
  - Some configuration files relating to hive, hbase, storm and yarn can be customized using Bootstrap with Azure Powershell, .NET SDK or the resource manager template.
 
  - Script actions can be used to invoke custom scripts on cluster nodes on new or running clusters.
 
  - Custom applications can be added on new or running clusters to enable multiple scenarios.
 
Recommended documents
Bootstrap actions
Custom Script actions
Custom Applications