主机网络配置--CentOS系统配置/Java环境配置

CentOS系统配置

centos7关闭防火墙
systemctl stop firewalld.service
systemctl disable firewalld.service
关闭selinux
setenforce 0
vim /etc/selinux/config
SELINUX=disabled

centos7配置主机名
临时修改主机名
hostname master
永久修改主机名
vim /etc/hostname
master

vim /etc/hosts
127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
192.168.88.200 master
192.168.88.201 slave1
192.168.88.202 slave2

修改网卡:
TYPE=“Ethernet”
BOOTPROTO=“static”
NAME=“ens33”
DEVICE=“ens33”
IPADDR=“192.168.88.200”
ONBOOT=“yes”

重启网络
systemctl restart network.service

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YUM配置（三节点）

cd /etc/yum.repos.d/
rm -rf *
vim base.repo
[base]
name=Base
enabled=1
baseurl=file:///media
gpgcheck=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-6

挂载yum源
mount /dev/sr0 /media
yum -y install telnet

#更新yum缓存
yum makecache

yum repolist

Java环境配置（三节点root）

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目前hadoop安装需要JDK8.0以上版本，同时JDK需要ORACLE官方JDK，不能使用OPENJDK
tar -xvf jdk-8u144-linux-x64.tar
cp -rf jdk-8u144-linux-x64.tar /usr/local/jdk

yum -y remove java

修改环境变量:
vim /etc/profile
export JAVA_HOME=/usr/local/jdk
export PATH= $PATH:$JAVA_HOME/bin

source /etc/profile

scp -r /usr/local/jdk slave1:/usr/local/jdk
通过ssh向远程主机拷贝文件和目录（-r）