对Hive连接metastore数据库的密码进行加密处理

默认情况下，Hive连接metastore数据库的用户名和密码都是在hive-site.xml配置文件中明文设置的，存在安全隐患。生产环境中，这样做是不允许的，因此我们可以采用如下对密码进行加密处理的方式。

1. Original configuration
   
   javax.jdo.option.ConnectionPassword
   xxxxxx
   password to use against metastore database
   

2. Generate a JCEK file
   hadoop credential create javax.jdo.option.ConnectionPassword -provider jceks://file//usr/local/clo/ven/hive/conf/hive.jceks
   Enter password:
   Enter password again:
   javax.jdo.option.ConnectionPassword has been successfully created.
   org.apache.hadoop.security.alias.JavaKeyStoreProvider has been updated.

3. View the new file
   -rwx------ 1 hbase hbase 522 Jan 30 04:39 hive.jceks

4. Use the new file
   vi hive-site.xml

hadoop.security.credential.provider.path
jceks://file//usr/local/clo/ven/hive/conf/hive.jceks

5. Remove the Hive Metastore password entry (javax.jdo.option.ConnectionPassword) from the Hive configuration. The CredentialProvider will be used instead.

6. Restart Hive Metastore Server

重新启动Hive CLI，正常连接，说明配置成功。