1、安装VirtualBox
https://www.virtualbox.org/
下载最新版6.0
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安装启动。
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2、下载Ubuntu18.04镜像
应为计划搭建hadoop集群，所以用server版本。
https://www.ubuntu.com/download/server
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3、安装Ubuntu
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启动安装。
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选择下载的iso文件。
用户和密码都设置成为hadoop，一路安装即可。
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4、配置主机
开启root账户
sudo passwd root
设置密码为hadoop
安装ssh服务
apt-get install openssh-server
设置允许超级管理员远程访问
# vi /etc/ssh/sshd_config
找到并用#注释掉这行：PermitRootLogin prohibit-password
新建一行 添加：PermitRootLogin yes
重启服务
# service ssh restart
设置网络桥接方式。
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配置固定ip
/etc/netplan/50-cloud-init.yaml
network:
version: 2
renderer: networkd
ethernets:
ens33: #配置的网卡名称
dhcp4: no #dhcp4关闭
dhcp6: no #dhcp6关闭
addresses: [192.168.0.151/24] #设置本机IP及掩码
gateway4: 192.168.0.151 #设置网关
nameservers:
addresses: [114.114.114.114, 8.8.8.8] #设置DNS
netplan apply 使配置生效。
配置hosts
/etc/hosts
#主机信息
192.168.0.151 hadoop01
192.168.0.152 hadoop02
192.168.0.153 hadoop03
192.168.0.154 hadoop04
192.168.0.155 hadoop05
配置hostname
sudo vi /etc/hostname
修改/etc/cloud/cloud.cfg
sudo vi/etc/cloud/cloud.cfg
preserve_hostname: true #这里是将false改成true
修改最大线程数
vim /etc/security/limits.conf
root soft nofile 10240
root hard nofile 10240
root soft noproc 10240
root hard noproc 10240
设置时区
sudo tzselect
sudo cp /usr/share/zoneinfo/Asia/Shanghai /etc/localtime
设置ntp
sudo apt-get install ntp
service ntp start
安装jdk1.8
自带安装
apt install openjdk-8-jdk-headless
修改etc/profile
export JAVA_HOME=/usr/lib/jvm/java-8-openjdk-amd64
export JRE_HOME=$JAVA_HOME/jre
export CLASSPATH=.:${JAVA_HOME}/lib:${JRE_HOME}/lib
export PATH=${JAVA_HOMR}/bin:$PATH
配置生效
source /etc/profile
5、复制主机
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登录更改相关的hostname和ip地址即可。
6、集群间主机互信
生成密钥（主机全部执行一遍)
hadoop@hadoop01:~$ ssh-keygen -t rsa
Generating public/private rsa key pair.
Enter file in which to save the key (/home/hadoop/.ssh/id_rsa):
Created directory '/home/hadoop/.ssh'.
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in /home/hadoop/.ssh/id_rsa.
Your public key has been saved in /home/hadoop/.ssh/id_rsa.pub.
The key fingerprint is:
SHA256:3QfoHhnfu/GwcJ0zKNWIYYq7cCQko6vZjdAP47lR1cA hadoop@hadoop01
The key's randomart image is:
+---[RSA 2048]----+
| .. |
| Eo . |
| o .. . oo. |
| . +. .oo=ooo |
| . .. oS.=.ooo. |
| ... o .. ....o.|
|..= . o ....=+.|
|.= O o . .o *o|
|o *.o . o .|
+----[SHA256]-----+
传给互信主机
cat ~/.ssh/id_rsa.pub >> ~/.ssh/authorized_keys
scp ~/.ssh/authorized_keys hadoop01:/root/.ssh/authorized_keys
scp ~/.ssh/authorized_keys hadoop02:/root/.ssh/authorized_keys
scp ~/.ssh/authorized_keys hadoop03:/root/.ssh/authorized_keys
scp ~/.ssh/authorized_keys hadoop04:/root/.ssh/authorized_keys
scp ~/.ssh/authorized_keys hadoop05:/root/.ssh/authorized_keys
全文完。