Virtual machine initialization script, virtual machine mutual secret key free

One 、 Virtual machine initialization script  

#!/bin/bash
## -bash: ./lucky.sh: /bin/bash^M: bad interpreter: No such file or directory
## vim perhaps vi In command mode , Enter the command  set fileformat=unix  You can solve the line feed problem 
echo -e "\e[1;31m【---------------------------------------- stay opt and var establish lucky Folder 】\e[0m"
sleep5
mkdir -p /opt/lucky
mkdir -p /var/lucky
mkdir -p /usr/local/script

echo -e "\e[1;31m【---------------------------------------- Disable firewall 】\e[0m"
sleep 5
systemctl stop firewalld
systemctl disable firewalld
systemctl status firewalld

echo -e "\e[1;32m【---------------------------------------- modify selinux】\e[0m"
sleep 5
sed -i '/^SELINUX=/c SELINUX=disabled' /etc/selinux/config

echo -e "\e[1;32m【---------------------------------------- install wget】\e[0m"
sleep 5
yum install wget -y

echo -e "\e[1;33m【---------------------------------------- modify yum Source 】\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【---------------------------------------- Install common software 】\e[0m"
yum install man man-pages ntp vim lrzsz zip unzip telnet perl net-tools -y

echo -e "\e[1;34m【---------------------------------------- Synchronization system time 】\e[0m"
yum info ntp && ntpdate cn.ntp.org.cn

echo -e "\e[1;34m【----------------------------------------DNS Domain name configuration 】\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【---------------------------------------- install 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【---------------------------------------- install 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【---------------------------------------- install 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 [email protected] identified by '123456';

use mysql;
update user set host='%' where user = 'root';
commit;
quit
EOF

systemctl restart mysqld

echo -e "\e[1;35m【---------------------------------------- install Nginx】\e[0m"
sleep 5
echo -e "\e[1;36m【---------------------------------------- Set the boot entry 】\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【---------------------------------------- Delete file 】\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【---------------------------------------- Close the calculator , Take a snapshot 】
\e[0m"
sleep 5
shutdown -h now

Two 、 Virtual machines are mutually keyless

## The three hosts generate secret keys 
【123】ssh-keygen -t rsa -P '' -f ~/.ssh/id_rsa

##host verification 
【123】vim /etc/ssh/ssh_config  Add at the end 

StrictHostKeyChecking no
UserKnownHostsFile /dev/null

## Copy the secret key to yourself and others 
【123】ssh-copy-id -i ~/.ssh/id_rsa.pub [email protected]
【123】ssh-copy-id -i ~/.ssh/id_rsa.pub [email protected]
【123】ssh-copy-id -i ~/.ssh/id_rsa.pub [email protected]

123456

## Turn off the host to take a snapshot 
power off