在您的 Amazon EMR 集群上安装其他软件

EmrCluster提供了在亚马逊EMR集群上安装第三方软件的supportedProducts字段，例如，它允许您安装 Hadoop 的自定义发行版，例如 MapR。它接受适用于第三方软件读取和处理的参数的逗号分隔列表。以下示例说明如何使用 EmrCluster 的 supportedProducts 字段来创建已安装 Karmasphere Analytics 的自定义 MapR M3 版本集群，并在该集群上运行 EmrActivity 对象。

{
    "id": "MyEmrActivity",
    "type": "EmrActivity",
    "schedule": {"ref": "ResourcePeriod"},
    "runsOn": {"ref": "MyEmrCluster"},
    "postStepCommand": "echo Ending job >> /mnt/var/log/stepCommand.txt",    
    "preStepCommand": "echo Starting job > /mnt/var/log/stepCommand.txt",
    "step": "/home/hadoop/contrib/streaming/hadoop-streaming.jar,-input,s3n://elasticmapreduce/samples/wordcount/input,-output, \
     hdfs:///output32113/,-mapper,s3n://elasticmapreduce/samples/wordcount/wordSplitter.py,-reducer,aggregate"
  },
  {    
    "id": "MyEmrCluster",
    "type": "EmrCluster",
    "schedule": {"ref": "ResourcePeriod"},
    "supportedProducts": ["mapr,--edition,m3,--version,1.2,--key1,value1","karmasphere-enterprise-utility"],
    "masterInstanceType": "m3.xlarge",
    "taskInstanceType": "m3.xlarge"
}