1. 搭建一个测试集群，集群有4台机器，配置集群中每一台机器的/etc/hosts文件：
[root@nn .ssh]# cat /etc/hosts
127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
172.28.3.40 nn nn.hadoop.plat
172.28.3.41 dn1 dn0.hadoop.plat
172.28.3.42 dn2 dn1.hadoop.plat
172.28.3.43 dn3 dn2.hadoop.plat
2. 配置namenode到datanode ssh免密码登陆：
在nn上执行，ssh-keygen –t rsa
cd ~/.ssh
cat id_rsa.put >> authorized_keys
对集群中每一台data node执行: ssh-copy-id root@dn1 ssh-copy-id root@dn2 ssh-copy-id root@dn13
这样就可以保证，nn节点可以免密码登陆到dn1, dn2, dn3
[root@nn .ssh]# ifconfig
eth0 Link encap:Ethernet HWaddr 00:1A:4A:C6:6B:A0
inet addr:172.28.3.40 Bcast:172.28.7.255 Mask:255.255.248.0
inet6 addr: fe80::21a:4aff:fec6:6ba0/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:1064845 errors:0 dropped:0 overruns:0 frame:0
TX packets:557212 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:1578655986 (1.4 GiB) TX bytes:647178854 (617.1 MiB) lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:103276 errors:0 dropped:0 overruns:0 frame:0
TX packets:103276 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:58108687 (55.4 MiB) TX bytes:58108687 (55.4 MiB) [root@nn .ssh]# cat /etc/hosts
127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
172.28.3.40 nn nn.hadoop.plat
172.28.3.41 dn1 dn0.hadoop.plat
172.28.3.42 dn2 dn1.hadoop.plat
172.28.3.43 dn3 dn2.hadoop.plat
[root@nn .ssh]# ssh dn1
SIOCADDRT: File exists
3. 关闭iptables
chkconfig iptables off
/etc/init.d/iptables stop
4. 关闭seLinux
查看selinux状态：
[root@localhost ~]# /usr/sbin/sestatus –v
/usr/sbin/setenforce 0 #使SELinux工作模式变成permissive模式
/usr/sbin/setenforce 1 #使SELinux工作模式变成enforcing模式
这样就可以实时控制SELinux的启用和不启用了。
三个参数介绍介绍
-
enforcing — The SELinux security policy is enforced.
-
permissive — The SELinux system prints warnings but does not enforce policy.
disabled — SELinux is fully disabled. SELinux hooks are disengaged from the kernel and the pseudo-file system is unregistered.
永久关闭SELinux
编辑/etc/selinux/config，找到SELINUX 行修改成为：SELINUX=disabled:
# 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 - Only targeted network daemons are protected.
# strict - Full SELinux protection.
SELINUXTYPE=targeted
如果重启系统，就会发现SELinux的状态变成disabled
5. 关闭linux内核huge_page:
Add the following lines in /etc/rc.local and reboot the server:
echo never > /sys/kernel/mm/redhat_transparent_hugepage/enabled
echo never > /sys/kernel/mm/redhat_transparent_hugepage/defrag
6. 安装java，配置JAVA_HOME
mkdir /usr/java
cd /usr/java
rz -be
/usr/java/jdk1.7.0_75
ln -s /usr/java/jdk1.7.0_75 /usr/java/default vim /etc/profile route add default gw 172.28.0.1
export JAVA_HOME=/usr/java/default
export PATH=$JAVA_HOME/bin:$PATH
编辑好/etc/profile，执行source /etc/profile使配置生效，保证每一台机器上的java版本都是一致的，并且JAVA_HOME环境变量是有效的：
7. 每台机器上安装ntpd
rpm -aq | grep ntpd
yum install ntpd
chkconfig ntpd on
service ntpd start
确保每台机器的ntpd服务都处于运行状态：
8. 确保机器上安装了openssh-server，并且升级openssl到最新：
rpm -qa | grep ssh
yum install openssh-server
service sshd restart
chkconfig sshd on
确保openssl最新：
yum install openssl-devel-1.0.1e-42.el6.x86_64
9. yum源确保可以用，本次安装采用了163的yum源，先将/etc/yum.repos.d/中，所有的文件都删掉，然后新建文件CentOS6-Base-163.repo，填入如下内容：
# CentOS-Base.repo
#
# The mirror system uses the connecting IP address of the client and the
# update status of each mirror to pick mirrors that are updated to and
# geographically close to the client. You should use this for CentOS updates
# unless you are manually picking other mirrors.
#
# If the mirrorlist= does not work for you, as a fall back you can try the
# remarked out baseurl= line instead.
#
# [base]
name=CentOS-$releasever - Base - 163.com
baseurl=http://mirrors.163.com/centos/$releasever/os/$basearch/
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=os
gpgcheck=1
gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6 #released updates
[updates]
name=CentOS-$releasever - Updates - 163.com
baseurl=http://mirrors.163.com/centos/$releasever/updates/$basearch/
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=updates
gpgcheck=1
gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6 #additional packages that may be useful
[extras]
name=CentOS-$releasever - Extras - 163.com
baseurl=http://mirrors.163.com/centos/$releasever/extras/$basearch/
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=extras
gpgcheck=1
gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6 #additional packages that extend functionality of existing packages
[centosplus]
name=CentOS-$releasever - Plus - 163.com
baseurl=http://mirrors.163.com/centos/$releasever/centosplus/$basearch/
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=centosplus
gpgcheck=1
enabled=0
gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6 #contrib - packages by Centos Users
[contrib]
name=CentOS-$releasever - Contrib - 163.com
baseurl=http://mirrors.163.com/centos/$releasever/contrib/$basearch/
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=contrib
gpgcheck=1
enabled=0
gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6
配置ambari的yum源，本配置源是部署在本地局域网中的一台apache服务器上的：
[root@hdp159 yum.repos.d]# cat ambari.repo
[Updates-ambari-2.0.1]
name=ambari-2.0.1 - Updates
baseurl=http://172.28.4.159/ambari-test/centos6
gpgcheck=1
gpgkey=http://172.28.4.159/ambari-test/centos6/RPM-GPG-KEY/RPM-GPG-KEY-Jenkins
enabled=1
priority=1
[root@hdp159 yum.repos.d]#
将yum源配置好好了后，执行如下命令：
yum clean all
yum repolist
10. 在nn机器上，安装ambari-servier，执行如下命令，之所以加—nogpgcheck参数，是因为此处安装的是公司修改后的ambari，如果是安装原生的ambari，不用加该选项：
yum install --nogpgcheck ambari-server
11.配置和启动ambari-server, setup –j 配置ambari-server要使用的java环境：
ambari-server setup -j /usr/java/default
ambari-server start
12. 在浏览器中，输入nn:8080进入ambari的登陆页面，用户名和密码都是admin:
13. 配置HDP的redhat6的baseURL,此处使用的是本地局域网中的HDP安装源：
http://172.28.4.159/HDP2.2.6/HDP/centos6/2.x/updates/2.2.6.0/
http://172.28.4.159/HDP2.2.6/HDP-UTILS-1.1.0.20/repos/centos6/
14. 将nn节点下，/root/.ssh/id_rsa文件上传到ambari中，配置好Target Hosts:
15. 发现一个警告消息，在每一台机器上执行如下命令，消除警告：
[root@dn3 yum.repos.d]# python /usr/lib/python2.6/site-packages/ambari_agent/HostCleanup.py --silent --skip=users
INFO:HostCleanup:
Killing pid's: [''] INFO:HostCleanup:Deleting packages: [''] INFO:HostCleanup:
Deleting directories: ['']
INFO:HostCleanup:Path doesn't exists:
INFO:HostCleanup:
Deleting additional directories: ['']
INFO:HostCleanup:
Deleting repo files: []
INFO:HostCleanup:
Erasing alternatives:{'symlink_list': [''], 'target_list': ['']} INFO:HostCleanup:Path doesn't exists:
INFO:HostCleanup:Clean-up completed. The output is at /var/lib/ambari-agent/data/hostcleanup.result
16. 分配slaves和clients:
设置好，hive和oozie数据库的用户名和密码：
查看总结信息：
17. 进入安装流程，最后安装成功：
