cdh啓用sentry的步驟

cdh版本：5.14
主要參照官方文檔：https://www.cloudera.com/documentation/enterprise/5-14-x/topics/sentry.html

一.部署sentry服務
1.配置：官方建議將hive metastore的heap size至少設爲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中每百萬個對象（包括servers, databases, tables, partitions, columns, URIs, and views），則sentry的Heap Size相應地須要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.安裝sentry
在CDH中添加sentry服務

3.開啓sentry服務以前的準備工做
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服務中勾選開啓senrty認證
去除hiveserver2配置項：HiveServer2 Enable Impersonation
增長yarn nodemanager選項-Allowed System Users：增長hive
在hive配置 hadoop.proxyuser.hive.groups，增長hive,hue,sentry

二.集成

1.hive配置項Sentry 服務，選擇sentry
2.impala配置項Sentry 服務 選擇sentry
3.hue配置項Sentry 服務 選擇sentry