以兩台節點為例來組件Hadoop分布式集群，這里采用的系統版本為Centos7，如下表所示：
| 主機名 |
內存 |
硬盤 |
IP地址 |
角色 |
| master |
8192MB |
100G |
192.168.200.131 |
Ambari-Server Ambari-Agent |
| slave1 |
4096MB |
100G |
192.168.200.133 |
Ambari-Agent |
1.1 配置主機名
# master
# hostnamectl set-hostname master
# hostname
master
# slave1
# hostnamectl set-hostname slave1
# hostname
slave1
1.2 修改hosts文件
# master
# vi /etc/hosts
192.168.200.131 master.hadoop master
192.168.200.133 slave1.hadoop
# slave1
# vi /etc/hosts
192.168.200.131 master.hadoop
192.168.200.133 slave1.hadoop slave1
注意：主機名映射采用FQDN格式。
1.3 修改yum源
# master
將XianDian-BigData-v2.2.iso掛在到/mnt目錄下，將其中的ambari解壓到/opt目錄下，並在master節點配置ftp服務。
注意：
因為安裝大數據相關軟件包時，可能會用到相關依賴軟件包，所以需要配置Centos7 Yum源，這里可以采用IAAS中的Centos7 Yum源。
# master & slave1
# cd /etc/yum.repos.d/
# rm -vf *
配置Yum源
# vi ambari.repo
[centos7]
baseurl=ftp://192.168.2.10/centos7/
（ 注：具體的yum源根據真實環境配置，本次為實驗室測試環境 )
gpgcheck=0
enabled=1
name=centos
[ambari]
name=ambari
baseurl=ftp://10.0.3.61/ambari
（ 注：具體的yum源根據真實環境配置，本次為實驗室測試環境 )
enabled=1
gpgcheck=0
# master
# yum -y install httpd
將/mnt/文件夾中HDP-2.6.1.0和HDP-UTILS-1.1.0.21兩個文件夾拷貝到/var/www/html/目錄下。啟動httpd服務。
# systemctl enable httpd.service
# systemctl status httpd.service
1.4 配置ntp
# master
# yum -y install ntp
# vi /etc/ntp.conf
注釋或者刪除以下四行
server 0.centos.pool.ntp.org iburst
server 1.centos.pool.ntp.org iburst
server 2.centos.pool.ntp.org iburst
server 3.centos.pool.ntp.org iburst
添加以下兩行
server 127.127.1.0
fudge 127.127.1.0 stratum 10
#systemctl enable ntpd
#systemctl start ntpd
# slave1
# yum -y install ntpdate
# ntpdate master
# systemctl enable ntpdate
1.5 配置SSH
# master & slave1
檢查2個節點是否可以通過無密鑰相互訪問，如果未配置，則進行SSH無密碼公鑰認證配置。如下：
# yum install openssh-clients
# ssh-keygen
# ssh-copy-id master.hadoop
# ssh-copy-id slave1.hadoop
ssh登錄遠程主機查看是否成功
# ssh master.hadoop
# exit
# ssh slave1.hadoop
# exit
1.6 禁用Transparent Huge Pages
操作系統后台有一個叫做khugepaged的進程，它會一直掃描所有進程占用的內存，在可能的情況下會把4kpage交換為Huge Pages，在這個過程中，對於操作的內存的各種分配活動都需要各種內存鎖，直接影響程序的內存訪問性能，並且，這個過程對於應用是透明的，在應用層面不可控制,對於專門為4k page優化的程序來說，可能會造成隨機的性能下降現象。
# master & slave1
# cat /sys/kernel/mm/transparent_hugepage/enabled
[always] madvise never
# echo never > /sys/kernel/mm/transparent_hugepage/enabled
# echo never > /sys/kernel/mm/transparent_hugepage/defrag
# cat /sys/kernel/mm/transparent_hugepage/enabled
always madvise [never]
重啟后失效，需要再次執行
1.7 安裝配置JDK
# master
# mkdir /usr/jdk64/
# mount -o loop XianDian-BigData-v2.2.iso /mnt/
# cd /mnt/
# tar -zxvf jdk-8u77-linux-x64.tar.gz -C /usr/jdk64/
# vi /etc/profile
export JAVA_HOME=/usr/jdk64/jdk1.8.0_77
export PATH=$JAVA_HOME/bin:$PATH
# source /etc/profile
#java –version
java version "1.8.0_77"
Java(TM) SE Runtime Environment (build 1.8.0_77-b03)
Java HotSpot(TM) 64-Bit Server VM (build 25.77-b03, mixed mode)
# slave1
#mkdir /usr/jdk64/
#scp 172.24.14.106://mnt/jdk-8u77-linux-x64.tar.gz .
# tar -zxvf jdk-8u77-linux-x64.tar.gz -C /usr/jdk64/
# vi /etc/profile
export JAVA_HOME=/usr/jdk64/jdk1.8.0_77
export PATH=$JAVA_HOME/bin:$PATH
# source /etc/profile
#java –version
java version "1.8.0_77"
Java(TM) SE Runtime Environment (build 1.8.0_77-b03)
Java HotSpot(TM) 64-Bit Server VM (build 25.77-b03, mixed mode)
2 配置ambari-server
# master
# yum -y install ambari-server
2.1 安裝MariaDB數據庫
# master
# yum install mariadb mariadb-server mysql-connector-java
啟動服務
# systemctl enable mariadb
# systemctl start mariadb
配置MySQL
#mysql_secure_installation
按enter確認后設置數據庫root密碼，我們這里設置為“bigdata”
Remove anonymous users? [Y/n] y
Disallow root login remotely? [Y/n] n
Remove test database and access to it? [Y/n] y
Reload privilege tables now? [Y/n] y
創建ambari數據庫
# mysql -uroot -pbigdata
MariaDB [(none)]> create database ambari;
MariaDB [(none)]> grant all privileges on ambari.* to 'ambari'@'localhost' identified by 'bigdata';
MariaDB [(none)]> grant all privileges on ambari.* to 'ambari'@'%' identified by 'bigdata';
MariaDB [(none)]> use ambari;
MariaDB [ambari]> source /var/lib/ambari-server/resources/Ambari-DDL-MySQL-CREATE.sql
MariaDB [ambari]> quit
2.2 安裝配置ambari-server
# master
vi /etc/profile
export buildNumber=2.6.0.0
# ambari-server setup
WARNING: SELinux is set to 'permissive' mode and temporarily disabled.
OK to continue [y/n] (y)?
Customize user account for ambari-server daemon [y/n] (n)? n
Checking JDK...
[1] Oracle JDK 1.8 + Java Cryptography Extension (JCE) Policy Files 8
[2] Oracle JDK 1.7 + Java Cryptography Extension (JCE) Policy Files 7
[3] Custom JDK
==============================================================================
Enter choice (1): 3
Path to JAVA_HOME: /usr/jdk64/jdk1.8.0_77
Validating JDK on Ambari Server...done.
Completing setup...
Configuring database...
Enter advanced database configuration [y/n] (n)? y
Configuring database...
====================================================================
Choose one of the following options:
[1] - PostgreSQL (Embedded)
[2] - Oracle
[3] - MySQL
[4] - PostgreSQL
[5] - Microsoft SQL Server (Tech Preview)
[6] - SQL Anywhere
====================================================================
Enter choice (1): 3
Hostname (localhost):
Port (3306):
Database name (ambari):
Username (ambari):
Enter Database Password (bigdata):
Proceed with configuring remote database connection properties [y/n] (y)?
Ambari Server 'setup' completed successfully.
# ambari-server setup --jdbc-db=mysql --jdbc-driver=/usr/share/java/mysql-connector-java.jar
啟動ambari-server服務
# ambari-server start
登陸界面http://192.168.200.131:8080/
登錄用戶名密碼為admin：admin
3 配置ambari-agent
# master & slave1
# yum -y install ambari-agent
# vi /etc/ambari-agent/conf/ambari-agent.ini
[server]
hostname= master.hadoop
# ambari-agent restart
# tail -f /var/log/ambari-agent/ambari-agent.log
INFO 2017-01-12 09:44:20,919 Controller.py:265 - Heartbeat response received (id = 1340)
INFO 2017-01-12 09:44:30,820 Heartbeat.py:78 - Building Heartbeat: {responseId = 1340, timestamp = 1484214270820, commandsInProgress = False, componentsMapped = True}