在企业里快速搭建大数据平台除了Ambria外还可以用Cloudera Manager，这两种工具相对于纯手工搭建确实便捷很多，但是有利也有弊，相对于新手来说就不便于掌握内部原理，不好排错等,而纯手工搭建，出错较多，不容易成功。一. 规划：
192.168.3.201 server/agent MySQL
192.168.3.202 agent namenode
192.168.3.203 agent namenode（备） resourcemanager
192.168.3.204 agent resourcemanager （备）
192.168.3.205 agent
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二. 环境准备
配置IP，hostname,
各个服务器IP配置：# vim /etc/sysconfig/network-script/ifcfg-eth0
service network restart
各个服务器名配置：# vim /etc/sysconfig/network
192.168.3.201 rac201.com
192.168.3.202 rac202.com
192.168.3.203 rac203.com
192.168.3.204 rac204.com
192.168.3.205 rac205.com
3.检查DNS配置，确保能上网
# vim /etc/resolve.conf
# ping www.baidu.com
4.关闭防火墙和禁用selinux
getenforce 查看selinux的状态并修改为disable状态
# vim /etc/sysconfig/selinux
SELINUX=disable
重启生效
5. 禁用和关闭防火墙
临时禁用 # iptables -F
# setenforce 0
或设置开机不启动
# service iptables stop
# chkconfig iptables off
6. 所有服务器卸载自带的JDK，安装新版本，比如1.7或1.8版本的
# rpm -qa | grep java
# rpm -e --nodeps tzdata-java-2012j-1.el6.noarch java-1.6.0-openjdk-1.6.0.0-1.50.1.11.5.el6_3.x86_64 java-1.7.0-openjdk-1.7.0.9-2.3.4.1.el6_3.x86_64
# mkdir -p /opt/modules
# tar zxf jdk-8u141-linux-x64.gz -C /opt/modules
7. 对所有服务器配置JAVA环境变量
# vi /etc/profile
export JAVA_HOME=/opt/modules/jdk1.8.0_141
export PATH=$PATH:$JAVA_HOME/bin
# source /etc/profile
8. 拷贝配置到其他服务器
# scp -r /opt/modules/jdk1.8.0_141 root@rac202.com:/opt/modules/
# scp -r /opt/modules/jdk1.8.0_141 root@rac203.com:/opt/modules/
# scp -r /opt/modules/jdk1.8.0_141 root@rac204.com:/opt/modules/
# scp -r /opt/modules/jdk1.8.0_141 root@rac205.com:/opt/modules/
检查： java -version
9. 配置服务器之间免密钥登录
9.1 # ssh-keygen
# ssh-copy-id -i ~/.ssh/id_rsa.pub rac201.com
# ssh-copy-id -i ~/.ssh/id_rsa.pub rac202.com
# ssh-copy-id -i ~/.ssh/id_rsa.pub rac203.com
# ssh-copy-id -i ~/.ssh/id_rsa.pub rac204.com
# ssh-copy-id -i ~/.ssh/id_rsa.pub rac205.com
9.2 # ssh rac01.com
# exit #不要忘记连接后要退出
# ssh rac02.com
# exit
# ssh rac03.com
# exit
# ssh rac04.com
# exit
# ssh rac05.com
# exit
10. 服务器时间同步
10.1 启动ntpd进程服务
# service ntpd start
# chkconfig ntpd on
# chkconfig --list | grep ntpd
10.2 修改时间服务器的配置
# vim /etc/ntp.conf
打开注释，修改成本服务器的网段
# restrict 192.168.3.0 mask 255.255.255.0 nomodify notrap
注释掉以下几行，可能是三行也可能是五行
#server 0.centos.pool.ntp.org
#server 1.centos.pool.ntp.org
#server 2.centos.pool.ntp.org
手工添加以下两行
server 127.127.1.0 # local clock
fudge 127.127.1.0 s
启动并且配置开机时启动
# service ntpd start && chkconfig ntpd on && chkconfig --list | grep ntpd
11. 对所有服务器设置能打开的文件最大数量、进程最大数，能使用的内存等
# vi /etc/security/limits.conf
* soft nofile 32728
* hard nofile 1024567
* soft nproc 65535
* hard nproc unlimited
* soft memlock unlimited
* hard memlock unlimited
复制limits.conf到其他服务器中
# scp /etc/security/limits.conf root@rac202.com:/etc/security/limits.conf
# scp /etc/security/limits.conf root@rac203.com:/etc/security/limits.conf
# scp /etc/security/limits.conf root@rac204.com:/etc/security/limits.conf
# scp /etc/security/limits.conf root@rac205.com:/etc/security/limits.conf
重启生效： ulimit -a 三. Mysql数据库安装
在rac201服务器检查并卸载系统自动安装的Mysql版本,
# rpm -e --nodeps mysql-libs-5.1.71-1.el6.x86_64采用yum源方式安装Mysql5.6, 先下载yum源文件,
# rpm -Uvh mysql57-community-release-el6-8.noarch.rpm
修改yum源文件：
vim /etc/yum.repos.d/mysql-community.repo
[mysql56-community]
enabled=1
gpgcheck=1
[mysql57-community]
enabled=0
gpgcheck=1
vim /etc/yum.repos.d/mysql-community-source.repo
[mysql56-community-source]
enabled=1
gpgcheck=1
[mysql-tools-preview-source]
name=MySQL Tools Preview - Source
baseurl=http://repo.mysql.com/yum/mysql-tools-preview/el/6/SRPMS
enabled=1
gpgcheck=1
用yum repolist mysql这个命令查看一下是否已经有mysql可安装文件
#yum repolist all | grep mysql
yum安装mysql, 一直yes下去
# yum -y install mysql-community-server
安装成功后，启动并初始化
# service mysqld start
# service mysqld status
mysql刚安装完，mysql的root用户的密码默认是空的，需要给root用户设置密码密码，执行下列命令进行安全设置
# mysql_secure_installation
输入当前用户：回车
输入root密码：123456
production environment.
Remove anonymous users? [Y/n] y
... Success!
Normally, root should only be allowed to connect from 'localhost'. This
ensures that someone cannot guess at the root password from the network.
Disallow root login remotely? [Y/n] n
... skipping.
By default, MySQL comes with a database named 'test' that anyone can
access. This is also intended only for testing, and should be removed
before moving into a production environment.
Remove test database and access to it? [Y/n] n
... skipping.
Reloading the privilege tables will ensure that all changes made so far
will take effect immediately.
Reload privilege tables now? [Y/n] y
... Success! 四. Cloudera Manager安装
在每台服务器上安装第三方依赖包，或者在Centos系统安装时安装好开发包
yum -y install chkconfig python bind-utils psmisc libxslt zlib sqlite cyrus-sasl-plain cyrus-sasl-gssapi fuse portmap fuse-libs redhat-lsb
提前下载好cloudera-manager-el6-cm5.3.6_x86_64.tar.gz
http://archive.cloudera.com/cm5/cm/5/cloudera-manager-el6-cm5.3.6_x86_64.tar.gz
在rac201服务器上创建CM的解压目录
在rac201服务器上修改修改agent配置
server_host=rac201.com
server_port=7182 拷贝解压后的CM文件夹到其他服务器
# scp -r /opt/cloudera-manager/ root@rac203.com:/opt/
# scp -r /opt/cloudera-manager/ root@rac204.com:/opt/
# scp -r /opt/cloudera-manager/ root@rac205.com:/opt/在所有服务器上创建CM的用户
# cat /etc/passwd | grep cloudera-scm设置CM数据库的权限
mysql> grant all privileges on *.* to 'temp'@'%' identified by 'temp' with grant option;
mysql> grant all privileges on *.* to 'temp'@'rac01.com' identified by 'temp' with grant option;
mysql> flush privileges;
mysql> use mysql;
mysql> select host ,user from user;
进入rac201服务器以下文件夹，执行脚本命令，事先要将mysql-connector-java.jar放入/usr/share/java文件夹中
# cd /opt/cloudera-manager/cm-5.3.6/share/cmf/schema
# ./scm_prepare_database.sh mysql -h rac01.com -utemp -ptemp --scm-host rac01.com scm scm scm 提前下载好CDH源文件
CDH-5.3.6-1.cdh6.3.6.p0.11-el6.parcel
CDH-5.3.6-1.cdh6.3.6.p0.11-el6.parcel.sha
在rac201服务器上创建以下目录
# mv CDH-5.3.6-1.cdh6.3.6.p0.11-el6.parcel* /opt/cloudera/parcel-repo/
在所有服务器上创建
# mkdir -p /opt/cloudera/parcels
更改parcel目录的所有人
在rac201服务器上
# chown -R cloudera-scm:cloudera-scm /opt/cloudera/parcel-repo/
在所有服务器上
# chown -R cloudera-scm:cloudera-scm /opt/cloudera/parcels 启动CM的进程
在rac201服务器上
# ./cloudera-scm-server start 在所有服务器上启动agent进程
# ./cloudera-scm-agent start CM的服务器登录界面
http://rac01.com:7180
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