1. 概述

本文首先会简单介绍Kylin的安装配置，然后介绍启用Kerberos的CDH集群中如何部署及使用Kylin。

Apache Kylin™是一个开源的分布式分析引擎，提供Hadoop/Spark之上的SQL查询接口及多维分析（OLAP）能力以支持超大规模数据，最初由eBay Inc. 开发并贡献至开源社区。它能在亚秒内查询巨大的Hive表。

1.2 环境说明

• CDH版本：5.11.2
• Linux版本：7.4.1708
• Docker版本：Docker version 18.06.0-ce
• JDK版本：1.8
• 操作用户：root

2.Kylin安装配置

2.1 安装

此处以Kylin 2.0.0版本为例。
社区版Kylin地址：https://archive.apache.org/dist/kylin/

[root@node-3 ~]# cd /usr/local/src/
[root@node-3 src]# wget https://archive.apache.org/dist/kylin/apache-kylin-2.0.0/apache-kylin-2.0.0-bin-cdh57.tar.gz
[root@node-3 src]# tar xf apache-kylin-2.0.0-bin-cdh57.tar.gz 
[root@node-3 src]# cp -a apache-kylin-2.0.0-bin /usr/local/
[root@node-3 src]# ln -s /usr/local/apache-kylin-2.0.0-bin /usr/local/kylin

2.2 环境配置

export BASE_PATH_BIG=/opt/cloudera/parcels/CDH/lib

#added by Hbase
export HBASE_HOME=$BASE_PATH_BIG/hbase

#added by HCat
export HCAT_HOME=/opt/cloudera/parcels/CDH/lib/hive-hcatalog/share/hcatalog

#added by Kylin
export KYLIN_HOME=/usr/local/kylin
export PATH=$HBASE_HOME/bin:$PATH

然后执行source /etc/profile生效。

2.3 Kylin配置

编辑/usr/local/kylin/conf/kylin.properites文件，新增以下配置：

Kylin2.0+版本配置的名称有变化，具体参考：https://github.com/apache/kylin/blob/2.0.x/core-common/src/main/resources/kylin-backward-compatibility.properties

## 修改配置（替换地址）
kylin.rest.servers=192.168.100.102:7070

## 新增配置
kylin.job.jar=/usr/local/apache-kylin-2.0.0-bin/lib/kylin-job-2.0.0.jar
kylin.coprocessor.local.jar=/usr/local/apache-kylin-2.0.0-bin/lib/kylin-coprocessor-2.0.0.jar
## 替换地址
kylin.job.yarn.app.rest.check.status.url=http://cdh-node-2:8088/ws/v1/cluster/apps/${job_id}?anonymous=true
kylin.job.mr.lib.dir=/opt/cloudera/parcels/CDH-5.11.2-1.cdh5.11.2.p0.4/lib/sentry/lib

配置说明：

• kylin.rest.servers：kylin实例服务器列表，注意：不包括以job模式运行的服务器实例！

• kylin.job.jar：MR jobs依赖

• kylin.coprocessor.local.jar：Hbase协同处理依赖，用于提高性能。

• kylin.job.yarn.app.rest.check.status.url：yarn工作区

• kylin.job.mr.lib.dir：Hive/Hbase依赖目录。（在没有安装Hive/Hbase的节点上构建Cube会因为找不到依赖报ClassNotFoundException错误，需要此配置。具体参考这边博文《上传Kylin MR依赖》
  )。

更多配置请参考官网配置指南。

2.4 创建用户

在每个节点创建Kylin用户

useradd kylin

3. Kerberos配置

3.1 创建kylin账号

在Kerberos server上创建kylin账号：

[root@cdh-node-1 /]# kadmin.local
Authenticating as principal admin/admin@HWINFO.COM with password.
kadmin.local:  addprinc kylin
WARNING: no policy specified for kylin@HWINFO.COM; defaulting to no policy
Enter password for principal "kylin@HWINFO.COM":
Re-enter password for principal "kylin@HWINFO.COM":
add_principal: Principal or policy already exists while creating "kylin@HWINFO.COM".
kadmin.local:

3.2 生成keytab文件

生成kylin账号keytab文件：

xst -norandkey -k klin.keytab kylin@HWINFO.COM

将kylin.keytab复制到每个kylin节点上。

3.3 定时刷新kt

在kylin节点上配置定时任务进行kinit命令：

kinit -k -t /root/kylin.keytab kylin@HWINFO.COM

添加定时任务,这里设置每天凌晨1点执行一次，可根据kerberos的过期时间自己配置。

• 编写shell脚本：

[root@cdh-node-2 security]# cat init_kt.sh
#!/bin/bash
kinit -kt ./kylin.keytab kylin@HWINFO.COM

• 添加定时任务：

[root@cdh-node-2 security]# crontab -e

# 添加以下内容
0 1 * * * root /home/security/init_kt.sh  > /tmp/kylin-ktinit.log 2>&1

# 查看定时任务
[root@cdh-node-2 security]# crontab -l
0 1 * * * root /home/security/init_kt.sh  > /tmp/kylin-ktinit.log 2>&1

3.4 添加Hive权限

• 登录Hive
  使用拥有操作hive权限的kerberos账户登录beeline：

[root@cdh-node-3 hive]# beeline -u \'jdbc:hive2://cdh-node-3:10000/default;principal=hive/cdh-node-3@HWINFO.COM\'
Java HotSpot(TM) 64-Bit Server VM warning: ignoring option MaxPermSize=512M; support was removed in 8.0
Java HotSpot(TM) 64-Bit Server VM warning: Using incremental CMS is deprecated and will likely be removed in a future release
Java HotSpot(TM) 64-Bit Server VM warning: ignoring option MaxPermSize=512M; support was removed in 8.0
scan complete in 2ms
Connecting to jdbc:hive2://cdh-node-3:10000/default;principal=hive/cdh-node-3@HWINFO.COM
Connected to: Apache Hive (version 1.1.0-cdh5.11.2)
Driver: Hive JDBC (version 1.1.0-cdh5.11.2)
Transaction isolation: TRANSACTION_REPEATABLE_READ
Beeline version 1.1.0-cdh5.11.2 by Apache Hive
0: jdbc:hive2://cdh-node-3:10000/default>

• 添加kylin权限
  将admin角色权限赋予kylin：

0: jdbc:hive2://cdh-node-3:10000/default> grant role admin to user kylin;
INFO  : Compiling command(queryId=hive_20180914174141_6359e1a1-251f-4116-b646-0aa9f55dcfa8): grant role admin to user leili
INFO  : Semantic Analysis Completed
INFO  : Returning Hive schema: Schema(fieldSchemas:null, properties:null)
INFO  : Completed compiling command(queryId=hive_20180914174141_6359e1a1-251f-4116-b646-0aa9f55dcfa8); Time taken: 0.069 seconds
INFO  : Executing command(queryId=hive_20180914174141_6359e1a1-251f-4116-b646-0aa9f55dcfa8): grant role admin to user leili
INFO  : Starting task [Stage-0:DDL] in serial mode
INFO  : Completed executing command(queryId=hive_20180914174141_6359e1a1-251f-4116-b646-0aa9f55dcfa8); Time taken: 0.331 seconds
INFO  : OK
No rows affected (0.528 seconds)

3.5 添加Hbase权限

使用拥有操作hbase权限的kerberos账户登录hbase shell：

[root@cdh-node-3 hive]# hbase shell
Java HotSpot(TM) 64-Bit Server VM warning: Using incremental CMS is deprecated and will likely be removed in a future release
18/09/14 17:44:40 INFO Configuration.deprecation: hadoop.native.lib is deprecated. Instead, use io.native.lib.available
HBase Shell; enter \'help<RETURN>\' for list of supported commands.
Type "exit<RETURN>" to leave the HBase Shell
Version 1.2.0-cdh5.11.2, rUnknown, Fri Aug 18 14:09:37 PDT 2017

• 给kylin用户授权

base(main):001:0> grant \'kylin\',\'RWXCA\'
0 row(s) in 0.5830 seconds

切换到kylin用户重新登录hbase shell，测试一下：

hbase(main):001:0> whoami
kylin@HWINFO.COM (auth:KERBEROS)
    groups: kylin

hbase(main):002:0> create \'test\', \'cf\'
0 row(s) in 2.6930 seconds

=> Hbase::Table - test
hbase(main):003:0> list
TABLE
test
1 row(s) in 0.0310 seconds

3.6 执行Kylin检查

[root@cdh-node-2 bin]# ./check-env.sh
Retrieving hadoop conf dir...
KYLIN_HOME is set to /usr/local/apache-kylin-2.0.0-bin

3.7 启动kylin服务

先确认主机使用kerberos凭据为kylin，再启动：

[root@cdh-node-2 bin]# klist
Ticket cache: FILE:/tmp/krb5cc_0
Default principal: kylin@HWINFO.COM

Valid starting       Expires              Service principal
09/14/2018 17:48:28  09/15/2018 17:48:28  krbtgt/HWINFO.COM@HWINFO.COM
	renew until 09/21/2018 17:48:28
[root@cdh-node-2 bin]# ./kylin.sh start
Retrieving hadoop conf dir...
KYLIN_HOME is set to /usr/local/kylin
Retrieving hive dependency...
Retrieving hbase dependency...
Retrieving hadoop conf dir...
Retrieving kafka dependency...
Retrieving Spark dependency...
KYLIN_JVM_SETTINGS is -Xms1024M -Xmx4096M -Xss1024K -XX:MaxPermSize=128M -verbose:gc -XX:+PrintGCDetails -XX:+PrintGCDateStamps -Xloggc:/usr/local/kylin/logs/kylin.gc.3982 -XX:+UseGCLogFileRotation -XX:NumberOfGCLogFiles=10 -XX:GCLogFileSize=64M

A new Kylin instance is started by root. To stop it, run \'kylin.sh stop\'
Check the log at /usr/local/kylin/logs/kylin.log
Web UI is at http://<hostname>:7070/kylin

4. 使用Kylin Sample测试

Kylin本身自带了一个测试例子，创建流程如下：
执行sample.sh脚本，这个主要是创建kylin的project、model、cube以及相关的hive表等。

[root@cdh-node-2 bin]# ./sample.sh
Retrieving hadoop conf dir...
Retrieving hadoop conf dir...
KYLIN_HOME is set to /usr/local/kylin
Loading sample data into HDFS tmp path: /tmp/kylin/sample_cube/d

...

Sample cube is created successfully in project \'learn_kylin\'.
Restart Kylin server or reload the metadata from web UI to see the change.

进入Kylin Web界面system – reload metadata
然后构建示例的cube，如果构建成功，并且能成功执行查询命令，则表示整个配置全部完成。

[1] Cloudera Configuring Authentication Doc：
https://www.cloudera.com/documentation/enterprise/5-11-x/topics/sg_authentication.html
[2] Kylin官网配置指南：
http://kylin.apache.org/cn/docs/install/configuration.html
[3] Linux下的crontab定时执行任务命令详解：
https://www.cnblogs.com/longjshz/p/5779215.html