1）使用yum安装http服务（主节点）
yum -y install httpd
2）将httpd服务加入系统自启动服务并设置开机启动
systemctl start httpd #启动apache服务器
systemctl stop httpd #关闭apache服务器
systemctl enable httpd #设置开机自动启动
systemctl status httpd.service #检查httpd服务状态
3）下载CM5.12.1rpm包（注意：此路径包含的是CentOS7版本的rpm包）
（https://archive.cloudera.com/cm5/redhat/7/x86_64/cm/5.12.1/RPMS/x86_64/）
将以上7个文件下载/var/www/html/cm5.12.1目录下
mkdir -p /var/www/html/cm5.12.1
cd /var/www/html/cm5.12.1/
4）创建cm本地源
[root@hadoop101 cm5.12.1]# cd /var/www/html/cm5.12.1/
[root@hadoop101 cm5.12.1]# createrepo .
Spawning worker 0 with 7 pkgs
Workers Finished
Saving Primary metadata
Saving file lists metadata
Saving other metadata
Generating sqlite DBs
Sqlite DBs complete
5）访问http://hadoop101.com/cm5.12.1/确认本地源是否能正常访问
6）配置cm的本地源，在/etc/yum.repo.d/目录下增加cm.repo文件，写入以下配置
[root@hadoop101 cm5.12.1]# vim /etc/yum.repos.d/cm.repo
[cmrepo]
name=CM5.12.1
baseurl=http://hadoop101.com/cm5.12.1
gpgcheck=false
enabled=true
7）验证CM源是否配置成功
[root@hadoop101 cm5.12.1]# yum repolist
Loaded plugins: fastestmirror, langpacks
Loading mirror speeds from cached hostfile
* base: mirrors.nju.edu.cn
* extras: mirrors.njupt.edu.cn
* updates: mirrors.njupt.edu.cn
cmrepo | 2.9 kB 00:00:00
cmrepo/primary_db | 1.1 kB 00:00:00
repo id repo name status
base/7/x86_64 CentOS-7 - Base 10,019
cmrepo CM5.12.1 0
extras/7/x86_64 CentOS-7 - Extras 435
updates/7/x86_64 CentOS-7 - Updates 2,500
repolist: 12,954
8）将cm.repo分发到其余各节点
[root@hadoop101 cm5.12.1]# xsync /etc/yum.repos.d/cm.repo
fname=cm.repo
pdir=/etc/yum.repos.d
------------------- hadoop102 --------------
sending incremental file list
cm.repo
sent 181 bytes received 35 bytes 144.00 bytes/sec
total size is 89 speedup is 0.41
------------------- hadoop103 --------------
sending incremental file list
cm.repo
sent 181 bytes received 35 bytes 432.00 bytes/sec
total size is 89 speedup is 0.41
3.4 启动CM服务