一、虚拟机初始化脚本 

#!/bin/bash

## -bash: ./lucky.sh: /bin/bash^M: bad interpreter: No such file or directory

## vim 或者 vi 的命令模式下，输入命令 set fileformat=unix 即可解决换行问题

echo -e "\e[1;31m 【 ---------------------------------------- 在 opt 和 var 创建 lucky 文件

夹】 \e[0m"

sleep 5

mkdir -p /opt/lucky

mkdir -p /var/lucky

mkdir -p /usr/local/script

echo -e "\e[1;31m 【 ---------------------------------------- 禁用防火墙】 \e[0m"

sleep 5

systemctl stop firewalld

systemctl disable firewalld

systemctl status firewalld

echo -e "\e[1;32m 【 ---------------------------------------- 修改 selinux 】 \e[0m"

sleep 5

sed -i '/^SELINUX=/c SELINUX=disabled' /etc/selinux/config

echo -e "\e[1;32m 【 ---------------------------------------- 安装 wget 】 \e[0m"

sleep 5

yum install wget -y

echo -e "\e[1;33m 【 ---------------------------------------- 修改 yum 源】 \e[0m"

sleep 5

mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backup

wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-

7.repo

yum clean all

yum makecache

echo -e "\e[1;33m 【 ---------------------------------------- 安装常用软件】 \e[0m"

yum install man man-pages ntp vim lrzsz zip unzip telnet perl net-tools -y

echo -e "\e[1;34m 【 ---------------------------------------- 同步系统时间】 \e[0m"

yum info ntp && ntpdate cn.ntp.org.cn

echo -e "\e[1;34m 【 ----------------------------------------DNS 域名配置】 \e[0m"

sleep 5

echo "192.168.58.100 basenode" >> /etc/hosts

echo "192.168.58.161 bd1601" >> /etc/hosts

echo "192.168.58.162 bd1602" >> /etc/hosts

echo "192.168.58.163 bd1603" >> /etc/hosts

echo -e "\e[1;34m 【 ---------------------------------------- 安装 JDK 】 \e[0m"

sleep 5

rpm -ivh jdk-8u231-linux-x64.rpm

echo 'export JAVA_HOME=/usr/java/jdk1.8.0_231-amd64' >> /etc/profile

echo 'export PATH=$JAVA_HOME/bin:$PATH' >> /etc/profile

source /etc/profile

echo -e "\e[1;35m 【 ---------------------------------------- 安装 Tomcat 】 \e[0m"

sleep 5

tar -zxf apache-tomcat-8.5.47.tar.gz

mv apache-tomcat-8.5.47 /opt/lucky/

echo -e "\e[1;35m 【 ---------------------------------------- 安装 Mysql 】 \e[0m"

sleep 5

rpm -e --nodeps `rpm -qa | grep mariadb`

tar -xvf mysql-5.7.28-1.el7.x86_64.rpm-bundle.tar

rpm -ivh mysql-community-common-5.7.28-1.el7.x86_64.rpm

rpm -ivh mysql-community-libs-5.7.28-1.el7.x86_64.rpm

rpm -ivh mysql-community-client-5.7.28-1.el7.x86_64.rpm

rpm -ivh mysql-community-server-5.7.28-1.el7.x86_64.rpm

systemctl start mysqld

systemctl enable mysqld

temppasswd = `grep "A temporary password" /var/log/mysqld.log | awk '{ print

$NF }'`

mysql -uroot -p $temppasswd --connect-expired-password << EOF

set global validate_password_policy = low;

set global validate_password_length = 6 ;

alter user root@localhost identified by '123456' ;

use mysql;

update user set host = '%' where user = 'root' ;

commit;

quit

EOF

systemctl restart mysqld

echo -e "\e[1;35m 【 ---------------------------------------- 安装 Nginx 】 \e[0m"

sleep 5

echo -e "\e[1;36m 【 ---------------------------------------- 设置开机启动项】 \e[0m"

sleep 5

touch /usr/local/script/auto_ntpdate.sh

echo '#!/bin/bash' >> /usr/local/script/auto_ntpdate.sh

echo 'yum info ntp && ntpdate cn.ntp.org.cn' >>

/usr/local/script/auto_ntpdate.sh

chmod u + x /usr/local/script/auto_ntpdate.sh

echo '/usr/local/script/auto_ntpdate.sh' >> /etc/rc.local

chmod u + x /etc/rc.local

echo -e "\e[1;36m 【 ---------------------------------------- 删除文件】 \e[0m"

sleep 5

rm -rf apache-tomcat-8.5.47.tar.gz

rm -rf jdk-8u231-linux-x64.rpm

rm -rf mysql*

rm -rf *.sh

echo -e "\e[1;36m 【 ---------------------------------------- 关闭计算器，拍快照】

\e[0m"

sleep 5

shutdown -h now

二、虚拟机相互免秘钥

## 三台主机分别生成秘钥

【 123 】 ssh-keygen -t rsa -P '' -f ~/.ssh/id_rsa

##host 验证

【 123 】 vim /etc/ssh/ssh_config 在最后添加

StrictHostKeyChecking no

UserKnownHostsFile /dev/null

## 将秘钥分别拷贝给自己和别人

【 123 】 ssh-copy-id -i ~/.ssh/id_rsa.pub root@bd1701

【 123 】 ssh-copy-id -i ~/.ssh/id_rsa.pub root@bd1702

【 123 】 ssh-copy-id -i ~/.ssh/id_rsa.pub root@bd1703

123456

## 关闭主机拍摄快照

power off