CENTOS7.2 安装 CDH5.16 集群一前置检查

1主机情况
Df -h
Lsblk
Cat /etc/fstab

2统一主机名和域名
Vim /etc/hosts

Vim /etc/hostname

3修改网关
Vim /etc/sysconfig/network-scripts/ifcfg-ens192

Service network restart 重启网卡服务，使上述生效

4禁用SELinux
Vim /etc/selinux/config

为了SELinux更换失效，需要重新启动reboot

5关闭防火墙
关闭：Systemctl stop firewalld

查看状态：Systemctl status firewalld

6关闭透明大页
echo never > /sys/kernel/mm/transparent_hugepage/defrag
echo never > /sys/kernel/mm/transparent_hugepage/enabled

7 swap设置为1
并永久修改并保存到文件：echo vm.swappiness = 1 >> /etc/sysctl.conf
sysctl -p 可以立即生效

8安装Httpd服务
安装：Sudo yum -y install httpd
启动：Sudo systemctl start httpd
关闭：Sudo systemctl stop httpd

9 yum源的安装
rhel-server-7.2-x86_64-dvd.iso镜像文件挂载
mount -o loop /root/iso/rhel-server-7.2-x86_64-dvd.iso /root/dev/centos
sudo scp -r /root/dev/centos/* /var/www/html/iso/
配置yum的repo
Local.repo

本地yum源

通过该配置，可以使集群的主机访问http://192.168.0.197/cm5.16目录下的文件
Os.repo

Yum repolist 使repo生效

10集群时间同步
安装ntp：Yum -y install ntp
修改配置文件：Vim /etc/ntp.conf
基准主机：所有集群同步node1主机

跟随主机 node2,node3,node4

11安装MariaDB
1安装：yum-y install mariadb mariadb-server
2启动： systemctl start mariadb
3初始化数据库：sudo /usr/bin/mysql_secure_installation
设置密码123456，移除匿名用户，允许远程连接，删除测试数据库并访问它，重新加载特权表
4建立组件对用的元数据表，以cm和hive为例：
mysql -uroot -p123456
create database metastore default character set utf8;
CREATE USER ‘hive’@’%’ IDENTIFIED BY ‘password’;
GRANT ALL PRIVILEGES ON metastore. * TO ‘hive’@’%’;
FLUSH PRIVILEGES;
create database cm default character set utf8;
CREATE USER ‘cm’@’%’ IDENTIFIED BY ‘password’;
GRANT ALL PRIVILEGES ON cm. * TO ‘cm’@’%’;
FLUSH PRIVILEGES;

5建立jdbc驱动的软连接
sudo ln -s mysql-connector-java-5.1.37.jar
mysql-connector-java.jar