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【Hadoop】使用Ambari安装部署Hadoop集群

原文：

https://www.jianshu.com/p/73f9670f71cf

部署环境使用4台机器，OS使用CentOS7，部署图如下：

Paste_Image.png

环境准备

1、节点间互信

# ssh-keygen -t rsa
# cat .ssh/id_rsa.pub >> .ssh/authorized_keys
# scp .ssh/authorized_keys hadoop-node1:~/.ssh/authorized_keys

将所有节点的rsa公钥信息都保存到authorized_keys文件中，并且保存到每个节点~/.ssh/目录里。然后验证一下。

# ssh hadoop-node1 date
Fri Mar 24 13:27:12 CST 2017

2、关闭防火墙、selinux

# systemctl stop firewalld
# systemctl disable firewalld

# sestatus 
SELinux status:                 enabled
SELinuxfs mount:                /sys/fs/selinux
SELinux root directory:         /etc/selinux
Loaded policy name:             targeted
Current mode:                   enforcing
Mode from config file:          enforcing
Policy MLS status:              enabled
Policy deny_unknown status:     allowed
Max kernel policy version:      28

# setenforce 0
# vi /etc/sysconfig/selinux
SELINUX=disabled

安装Ambari-server

在控制节点上，安装ambari-server包（关于ambari编译，请参考另一篇文章“Ambari 2.4.2源代码编译”）及其依赖。

# yum install ambari-server -y

配置ambari server。

# ambari-server setup
/usr/sbin/ambari-server: line 33: buildNumber: unbound variable

查看执行脚本，发现33行buildNumber环境变量没有定义值。

# export buildNumber=2.4.2.0
# ambari-server setup

询问daemon的用户账号，使用默认root用户即可。

检查防火墙和配置JDK。

配置数据库，选择1，其余默认即可。

完成ambari-server的配置。
启动ambari-server。

# ambari-server start
Using python  /usr/bin/python
Starting ambari-server
Ambari Server running with administrator privileges.
Organizing resource files at /var/lib/ambari-server/resources...
Ambari database consistency check started...
No errors were found.
Ambari database consistency check finished
Server PID at: /var/run/ambari-server/ambari-server.pid
Server out at: /var/log/ambari-server/ambari-server.out
Server log at: /var/log/ambari-server/ambari-server.log
Waiting for server start....................
Ambari Server 'start' completed successfully.

在受控节点上，安装Ambari-agent

# yum install ambari-agent -y
# vi /etc/ambari-agent/conf/ambari-agent.ini
[server]
#改为控制节点的机器名（IP也可）
hostname=hadoop-node0
# scp /etc/ambari-agent/conf/ambari-agent.ini 
   hadoop-node2:/etc/ambari-agent/conf/ambari-agent.ini
# scp /etc/ambari-agent/conf/ambari-agent.ini 
   hadoop-node3:/etc/ambari-agent/conf/ambari-agent.ini

启动agent。

# export buildNumber=2.4.2.0
# ambari-agent start
Verifying Python version compatibility...
Using python  /usr/bin/python
Checking for previously running Ambari Agent...
Starting ambari-agent
Verifying ambari-agent process status...
Ambari Agent successfully started
Agent PID at: /run/ambari-agent/ambari-agent.pid
Agent out at: /var/log/ambari-agent/ambari-agent.out
Agent log at: /var/log/ambari-agent/ambari-agent.log