搭建CDH的yum本地源
https://my.oschina.net/u/876354/blog/1610253
https://my.oschina.net/u/876354 博主 雪饼
http://archive.cloudera.com/cdh5/
https://archive.cloudera.com/cdh6/
为了方便在局域网中安装CDH集群，搭建一个CDH的yum本地源，方便局域网内各节点安装。
在Cloudera的官网中给出了CDH本地源的搭建过程（官网说明文档链接），下面是本人亲自搭建的详细过程，首先要找一台能联网的主机来制作本地源，可自动下载必要的安装包（如果全部都无法联网，则手动下载相关的rpm安装包，只是麻烦了一些，过程是一样的），制作好本地源后该主机再断网给本地局域网作为yum源使用即可。
1、关闭防火墙、关闭selinux
service iptables stop
chkconfig iptables off
[root@test001 selinux]# cat /etc/selinux/config
# This file controls the state of SELinux on the system.
# SELINUX= can take one of these three values:
# enforcing - SELinux security policy is enforced.
# permissive - SELinux prints warnings instead of enforcing.
# disabled - No SELinux policy is loaded.
SELINUX=disabled
# SELINUXTYPE= can take one of these two values:
# targeted - Targeted processes are protected,
# mls - Multi Level Security protection.
SELINUXTYPE=targeted
2、下载repo文件
根据操作系统下载repo文件（本人使用的是centos 7.4，x86_64位），到cloudera官网上下载repo文件，这是centos7对应的repo文件
下载链接:https://archive.cloudera.com/cdh5/redhat/7/x86_64/cdh/
cloudera-cdh5.repo
RPM-GPG-KEY-cloudera
下载后，将cloudera-cdh5.repo文件保存到/etc/yum.repos.d/目录下
3、安装本地http服务器
官网推荐的http服务器是lighttpd，这是一款极轻量级的http服务器，安装也非常简单
yum install epel-release
yum update
yum install lighttpd
本人习惯使用apache httpd，因此最后安装的是apache httpd
yum install httpd
设置可读取目录列表，对于lighttpd的设置如下：
vi /etc/lighttpd/conf.d/dirlisting.conf
dir-listing.activate = "enable"
dir-listing.hide-dotfiles = "enable"
对于apache httpd的设置方式为修改httpd.conf文件，加入以下配置项
cd /etc/httpd/conf
<Directory />
Options FollowSymLinks
AllowOverride None
Order deny,allow
allow from all
</Directory>
4、制作repo文件
安装createrepo程序
yum install yum-utils createrepo
下载CDH相关的rpm包
cd /var/www/html/
reposync -r cloudera-cdh5
在该目录下，制作repodata文件
createrepo -d /var/www/html/cloudera-cdh5/RPMS
下载RPM-GPG-KEY-cloudera文件，放到/var/www/html/cloudera-cdh5/RPMS 目录下，
下载链接:https://archive.cloudera.com/cdh5/redhat/7/x86_64/cdh/
5、修改repo文件中的本地源
修改/etc/yum.repos.d/cloudera-cdh5.repo中的下载url，指向本地源
cat cloudera-cdh5.repo
[cloudera-cdh5]
# Packages for Cloudera's Distribution for Hadoop, Version 5, on RedHat or CentOS 7 x86_64
name=Cloudera's Distribution for Hadoop, Version 5
#baseurl=https://archive.cloudera.com/cdh5/redhat/7/x86_64/cdh/5/
baseurl=http://192.168.80.131/cloudera-cdh5/RPMS
gpgkey =http://192.168.80.131/cloudera-cdh5/RPMS/RPM-GPG-KEY-cloudera
gpgcheck = 1
systemctl start httpd
systemctl enable httpd
6、更新源，安装CDH hadoop
yum update
yum install hadoop
然后再安装JDK，安装后cdh-hadoop就能运行了
