1. Install Ambari Server；
2. Enter list of hosts to be included in the cluster and provide your SSH key；
3. Register your hosts（Confirm hosts）；
4. Host checks；
5. Choose Services（HDFS，MR，Nagios，Ganglia，Hive，HBase，Pig，Sqoop，Zookeeper，，）；
6. Assign slaves and clients components to hosts you want to run them on；
7. Customize services；
8. Review（Plz review the configuration before installation）；
9. Install，Start and Test.
refer to:http://zh.hortonworks.com/kb/get-started-setting-up-ambari/
so far，hadoop ecosystem mainly maintanence by Hortonworks(HDP,that is Hortonworks Data Platform) and Cloudera.
Apache Ambari User Guide:
http://ambari.apache.org/1.2.2/installing-hadoop-using-ambari/content/index.html
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Ambari Install Hadoop ecosystem for 9 steps
原文：http://blog.csdn.net/cleverlzc/article/details/47279559