CDH6.2安装配置第二篇：CDH安装的前期配置

本篇介绍cdh安装之前需要的一些必要配置，当然这些配置也可以用shell脚本来配置。在安装之前请先配置好yum源，在文中用的统一都是阿里源。在安装的时候，要确保主机的内存是4G以上，要不然会无限重启cm服务

另外2篇传送门：

CDH6.2安装配置第一篇：CDH配置本地http服务

CDH6.2安装配置第三篇：前台页面配置讲解

其他配置的传送门：

LINUX的ssh免密码配置

LINUX之ntp时间同步服务配置

CDH版本：6.2

系统：centos7（el6是代表centos6系统，centos7则用el7表示）

主机3台：

master.com.cn 192.168.1.110 2C4G

salver1.com.cn 192.168.1.111 1C2G

salver2.com.cn 192.168.1.112 1C2G

yum服务器：yum.com.cn 192.168.1.100。这里如果不知道怎么配置的朋友，可以参考第一篇：https://www.cnblogs.com/yaowentao/p/12296329.html

基本配置

1. 主机名在系统安装的配置完毕，如果没有配置，可以进系统在修改

 $ vi /etc/hostname

2. 配置host文件

 $ vi /etc/hosts

 192.168.1.100 yum.com.cn

 192.168.1.110 master.com.cn

 192.168.1.111 salver1.com.cn

 192.168.1.112 salver2.com.cn

3. 关闭防火墙，selinux。配置完后重启

 $ sudo systemctl disable firewalld        #停止防火墙

 $ sudo systemctl stop firewalld           #禁止开机启动防火墙

 $ vi /etc/selinux/config

 SELINUX=disable　　　　　　　　　　　　　　　　#关闭selinux

4. 配置ntp服务与ssh免密码登陆配置，请参考我的另外2篇文档

ssh免密码配置传送门：https://www.cnblogs.com/yaowentao/p/12300321.html

ntp配置传送门：https://www.cnblogs.com/yaowentao/p/12300408.html

5. 如果有本地的yum源，就配置。如果没有就使用公网的yum源。

5.1 配置yum 本地库,也可以下载官网的repo文件，一个是从网上下载，一个是从本地yum库下载

 [cloudera-repo]

 name=cloudera-repo

 baseurl=http://192.168.10.225/cloudera-repos/cm6/6.2.1/redhat7/yum/

 enabled=

 gpgcheck=

5.2 网上yum源，直接下载即可

 $ sudo wget https://archive.cloudera.com/cm6/6.2.1/redhat7/yum/cloudera-manager.repo -P /etc/yum.repos.d/

6. 安装cdh专用jdk（需要在所有主机上都要安装）

 $ sudo yum -y install oracle-j2sdk1.8

7. 配置本地的mysql数据库，便于存放cdh服务器的一些配置，以及hadoop组件中需要的一些配置，如hive的源数据库。这里一般推荐用mysql，当然oracle等其他的数据库也可以。

直接用yum源安装

 $ wget http://repo.mysql.com/mysql-community-release-el7-5.noarch.rpm

 $ sudo rpm -ivh mysql-community-release-el7-.noarch.rpm

 $ sudo yum update

 $ sudo yum install mysql-server

 $ sudo systemctl start mysqld

配置mysql数据，并进行初始化，设置root密码

$vi /etc/my.cnf

[mysqld]

datadir=/var/lib/mysql

socket=/var/lib/mysql/mysql.sock

transaction-isolation = READ-COMMITTED

# Disabling symbolic-links is recommended to prevent assorted security risks;

# to do so, uncomment this line:

symbolic-links = 

key_buffer_size = 32M

max_allowed_packet = 32M

thread_stack = 256K

thread_cache_size =

query_cache_limit = 8M

query_cache_size = 64M

query_cache_type = 

max_connections =

#expire_logs_days =

#max_binlog_size = 100M

#log_bin should be on a disk with enough free space.

#Replace '/var/lib/mysql/mysql_binary_log' with an appropriate path for your

#system and chown the specified folder to the mysql user.

log_bin=/var/lib/mysql/mysql_binary_log

#In later versions of MySQL, if you enable the binary log and do not set

#a server_id, MySQL will not start. The server_id must be unique within

#the replicating group.

server_id=

binlog_format = mixed

read_buffer_size = 2M

read_rnd_buffer_size = 16M

sort_buffer_size = 8M

join_buffer_size = 8M

# InnoDB settings

innodb_file_per_table =

innodb_flush_log_at_trx_commit  =

innodb_log_buffer_size = 64M

innodb_buffer_pool_size = 4G

innodb_thread_concurrency =

innodb_flush_method = O_DIRECT

innodb_log_file_size = 512M

[mysqld_safe]

log-error=/var/log/mysqld.log

pid-file=/var/run/mysqld/mysqld.pid

sql_mode=STRICT_ALL_TABLES

配置开机自启动

 $ sudo systemctl enable mysqld

 $ sudo systemctl start mysqld

初始化mysql，设置root密码

 $ sudo /usr/bin/mysql_secure_installation

 [...]

 Enter current password for root (enter for none):

 OK, successfully used password, moving on...

 [...]

 Set root password? [Y/n] Y

 New password:

 Re-enter new password:

 Remove anonymous users? [Y/n] Y

 [...]

 Disallow root login remotely? [Y/n] N

 [...]

 Remove test database and access to it [Y/n] Y

 [...]

 Reload privilege tables now? [Y/n] Y

 All done!

安装mysql的jdbc

 $ wget https://dev.mysql.com/get/Downloads/Connector-J/mysql-connector-java-5.1.46.tar.gz

 $ tar zxvf mysql-connector-java-5.1..tar.gz

 $ sudo mkdir -p /usr/share/java/

 $ cd mysql-connector-java-5.1.

 $ sudo cp mysql-connector-java-5.1.-bin.jar /usr/share/java/mysql-connector-java.jar

给root授远程登陆权限

 mysql> GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY '' WITH GRANT OPTION;

 mysql> FLUSH PRIVILEGES;

创建cm服务，hadoop组件需要的库。用户统一用root。

 CREATE DATABASE scm DEFAULT CHARACTER SET utf8 DEFAULT COLLATE utf8_general_ci;

 GRANT ALL ON scm.* TO 'root'@'%' IDENTIFIED BY '';

 CREATE DATABASE amon DEFAULT CHARACTER SET utf8 DEFAULT COLLATE utf8_general_ci;

 GRANT ALL ON amon.* TO 'root'@'%' IDENTIFIED BY '';

 CREATE DATABASE rman DEFAULT CHARACTER SET utf8 DEFAULT COLLATE utf8_general_ci;

 GRANT ALL ON rman.* TO 'root'@'%' IDENTIFIED BY '';

 CREATE DATABASE hue DEFAULT CHARACTER SET utf8 DEFAULT COLLATE utf8_general_ci;

 GRANT ALL ON hue.* TO 'root'@'%' IDENTIFIED BY '';

 CREATE DATABASE metastore DEFAULT CHARACTER SET utf8 DEFAULT COLLATE utf8_general_ci;

 GRANT ALL ON metastore.* TO 'root'@'%' IDENTIFIED BY '';

 CREATE DATABASE sentry DEFAULT CHARACTER SET utf8 DEFAULT COLLATE utf8_general_ci;

 GRANT ALL ON sentry.* TO 'root'@'%' IDENTIFIED BY '';

 CREATE DATABASE nav DEFAULT CHARACTER SET utf8 DEFAULT COLLATE utf8_general_ci;

 GRANT ALL ON nav.* TO 'root'@'%' IDENTIFIED BY '';

 CREATE DATABASE navms DEFAULT CHARACTER SET utf8 DEFAULT COLLATE utf8_general_ci;

 GRANT ALL ON navms.* TO 'root'@'%' IDENTIFIED BY '';

 CREATE DATABASE oozie DEFAULT CHARACTER SET utf8 DEFAULT COLLATE utf8_general_ci;

 GRANT ALL ON oozie.* TO 'root'@'%' IDENTIFIED BY '';

安装cm服务器文件

 master:

 $ sudo yum -y install cloudera-manager-daemons cloudera-manager-agent cloudera-manager-server

 salver:

 $ sudo yum -y install cloudera-manager-daemons cloudera-manager-agent

scm初始化

 $ sudo /opt/cloudera/cm/schema/scm_prepare_database.sh mysql scm root

完成以上配置，就能正常登陆cm服务器的前台了。下面进入服务器的配置。请看第三篇。
1. 　　启动cm服务
```
 $ sudo systemctl start cloudera-scm-server

 $ sudo tail -f /var/log/cloudera-scm-server/cloudera-scm-server.log
```

启动成功：

各位小伙伴，对以上如有问题，请在下方留言沟通。以上都是我亲自测试通过安装成功的。

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