cdh启用sentry的步骤
cdh版本：5.14
主要参照官方文档：https://www.cloudera.com/documentation/enterprise/5-14-x/topics/sentry.html
成都创新互联服务项目包括青冈网站建设、青冈网站制作、青冈网页制作以及青冈网络营销策划等。多年来，我们专注于互联网行业，利用自身积累的技术优势、行业经验、深度合作伙伴关系等，向广大中小型企业、政府机构等提供互联网行业的解决方案，青冈网站推广取得了明显的社会效益与经济效益。目前，我们服务的客户以成都为中心已经辐射到青冈省份的部分城市，未来相信会继续扩大服务区域并继续获得客户的支持与信任！
一.部署sentry服务
1.配置：官方建议将hive metastore的heap size至少设为10GB：
Set the HMS heap size to at least 10 GB. This is required because by default, Sentry uses 12 connections to communicate with HMS. To verify the HMS heap size, open the Hive service, click the Configuration tab, and search for the Java Heap Size of Hive Meatstore Server in Bytes property.
hive中每百万个对象（包括servers, databases, tables, partitions, columns, URIs, and views），则sentry的Heap Size相应地需要2.25GB：
Cloudera recommends that for each Sentry host, you have 2.25 GB memory per million objects in the Hive database. Hive objects include servers, databases, tables, partitions, columns, URIs, and views.
Make sure that the JVM heap size is set to a value that is appropriate for the memory requirements. You can check the heap size in Cloudera Manager. Open the Sentry service, click the Configuration tab, and search for the Java Heap Size of Sentry Server in Bytes property. Set that property to the maximum size for the Java process heap memory.
2.安装sentry
在CDH中添加sentry服务
3.开启sentry服务之前的准备工作
Using the default Hive warehouse directory - Permissions on the warehouse directory must be set as follows (see following Note for caveats):
771 on the directory itself (by default, /user/hive/warehouse)
771 on all subdirectories (for example, /user/hive/warehouse/mysubdir)
All files and subdirectories should be owned by hive:hive
For example:
$ sudo -u hdfs hdfs dfs -chmod -R 771 /user/hive/warehouse
$ sudo -u hdfs hdfs dfs -chown -R hive:hive /user/hive/warehouse
在hive服务中勾选开启senrty认证
去除hiveserver2配置项：HiveServer2 Enable Impersonation
增加yarn nodemanager选项-Allowed System Users：增加hive
在hive配置 hadoop.proxyuser.hive.groups，增加hive,hue,sentry
二.集成
1.hive配置项Sentry 服务，选择sentry
2.impala配置项Sentry 服务 选择sentry
3.hue配置项Sentry 服务 选择sentry
文章题目：cdh启用sentry的步骤
新闻来源：http://6mz.cn/article/jecsge.html