基础环境准备
在所有节点都执行ssh-keygen -t rsa 生成Key
[root@linux-node1 ~]# ssh-keygen -t rsaGenerating public/private rsa key pair.Enter file in which to sa ve the key (/root/.ssh/id_rsa): Enter passphrase (empty for no passphrase): Enter same passphrase again: Your identification has been sa ved in /root/.ssh/id_rsa.Your public key has been sa ved in /root/.ssh/id_rsa.pub.虽然除了Server端之外，其他节点这一步其实可以不做，但执行一下 ssh-keygen 还是更省事：它会顺手把对应目录建好，权限也一并设置到位，这样就不用再手动折腾了。
将Ambari Server的公钥scp到其它节点上
[root@linux-node1 ~]# scp .ssh/id_rsa.pub 192.168.56.12:/root/.ssh/authorized_keys设置权限
[root@linux-node2 ~]# chmod 600 ~/.ssh/authorized_keys测试连接
[root@linux-node1 ~]# ssh 192.168.56.12Last login: Sat Apr2 16:42:46 2016 from 192.168.56.1[root@linux-node2 ~]#设置完毕无密码登录后，我们就可以开始部署ambari-server了。
安装jdk
由于ambari安装过程中的jdk下载比较缓慢，所以我们可以直接使用yum仓库里面的openjdk
[root@linux-node1 ~]# yum install -y ja va-1.8.0部署ambari-server
ambari-server的部署比较简单，很多实用实用默认即是最好的选择。
安装ambari-server
[root@test-node3 ~]# cd /etc/yum.repos.d/# wget https://public-repo-1.hortonworks.com/ambari/centos7/2.x/updates/2.2.0.0/ambari.repo# yum install -y ambari-server设置ambari-server
安装完毕后，需要使用ambari-server setup命令进行设置，均可以使用默认设置，直接回车即可。
[root@linux-node1 ~]# ambari-server setupUsing python/usr/bin/python2Setup ambari-serverChecking SELinux...SELinux status is 'disabled'Customize user account for ambari-server daemon [y/n](n)? Adjusting ambari-server permissions and ownership...Checking firewall status...Redirecting to /bin/systemctl statusiptables.serviceChecking JDK...[1] Oracle JDK 1.8 Ja va Cryptography Extension (JCE) Policy Files 8[2] Oracle JDK 1.7 Ja va Cryptography Extension (JCE) Policy Files 7[3] Custom JDK===========================================================================Enter choice (1): 3WARNING: JDK must be installed on all hosts and JA VA_HOME must be valid on all hosts.WARNING: JCE Policy files are required for configuring Kerberos security. If you plan to use Kerberos,please make sure JCE Unlimited Strength Jurisdiction Policy Files are valid on all hosts.Path to JA VA_HOME: /usr/lib/jvm/ja va-1.8.0-openjdk-1.8.0.77-0.b03.el7_2.x86_64/jre/Validating JDK on Ambari Server...done.Completing setup...Configuring database...Enter advanced database configuration [y/n](n)?Configuring database...Default properties detected. Using built-in database.Configuring ambari database...Checking PostgreSQL...Running initdb: This may take upto a minute.Initializing database ... OKAbout to start PostgreSQLConfiguring local database...Connecting to local database...done.Configuring PostgreSQL...Restarting PostgreSQLExtracting system views...ambari-admin-2.2.0.0.1310.jar......Adjusting ambari-server permissions and ownership...Ambari Server 'setup' completed successfully.启动ambari-server
[root@linux-node1 ~]# ambari-server start
查看监听端口
[root@linux-node1 ~]# netstat -ntlp | grep 8080tcp6 00 :::8080 :::*LISTEN24168/ja va访问ambari server
现在可以在浏览器访问你的ambari server了。注意端口是8080。
https://192.168.56.11:8080/默认的用户名和密码都是admin
创建Hadoop集群
进入 Ambari 后，直接点击“Launch Install Wizard”按钮，平台部署流程就正式启动了，也意味着可以着手搭建自己的大数据平台。
1.设置集群的名称
2.选择一个Stack，默认使用最新版本。
3.填写你环境的所有主机名，并上传验证的公钥。注意使用FQDN名称，并且主机名要能够解析。
4.选择需要安装的组件
5.角色分配
其它步骤均使用默认配置即可。
