1.centos安装包，两个DVD的ISO都要，做YUM源
2.EPEL包
3.AMBARI包，可在官网下载repo，然后再通过以下方式获取，其它包的yum源在通过ambari安装时会自动下载
yum repolist
reposync -r ambari-2.5.0.3
reposync -r HDP-2.6
reposync -r HDP-UTILS-1.1.0.21
4.做本地yum源
5.关闭iptables和seliunx
5.关闭THP
echo never > /sys/kernel/mm/redhat_transparent_hugepage/defrag
echo never > /sys/kernel/mm/redhat_transparent_hugepage/enabled
echo never > /sys/kernel/mm/transparent_hugepage/enabled
echo never > /sys/kernel/mm/transparent_hugepage/defrag

centos安装hdp