集群环境自动配置脚本

在学习的过程中，有时候就把环境搞坏了，反复反复反复，浪费了很多时间，所以就搞了一个自动化环境配置脚本，在这里记一下

一、环境准备

1. 安装多台虚拟机实例，这是使用的是CentOS 6.9；
2. 保证每台虚拟机实例可以联网，至少可以内部互通；
3. 在一台机器A上安装httpd，遇到的问题具体的配置这里，把jdk放在html文件夹中；

二、配置脚本

1. 配置A机器的脚本：install.sh

   #!/bin/bash
   
   SERVERS="192.168.70.131 192.168.70.132 192.168.70.133"
   PASSWORD=CentOS6.9
   BASE_SERVER=192.168.70.100
   
   config_ssh_auto_login() {
       expect -c "set timeout -1;
           spawn ssh-copy-id $1;
           expect {
               *(yes/no)* {send -- yes\r;exp_continue;}
               *password:* {send -- $2\r;exp_continue;}
               eof        {exit 0;}
           }";
   }
   
   config_ssh_auto_login_batch() {
       echo ~~~~~~~~~~~~~~~~~~~~~~~~~~ Starting ssh-copy-id ~~~~~~~~~~~~~~~~~~~~~~~~~~
       for SERVER in $SERVERS
       do
           config_ssh_auto_login $SERVER $PASSWORD
       done
   }
   
   config_local_env() {
       yum install -y openssh-clients;
       yum install -y expect;
   }
   
   config_remote_openssh_clients() {
       for SERVER in $SERVERS
       do
           expect -c "set timeout -1;
               spawn ssh root@$SERVER yum install -y openssh-clients;
               expect {
                   *password:* {send -- $PASSWORD\r;exp_continue;}
                   *(yes/no)* {send -- yes\r;exp_continue;}
                   eof        {exit 0;}
               }";
       done
   }
   
   make_rsa_key() {
       expect -c "set timeout -1;
           spawn ssh-keygen;
           expect {
               */.ssh/id_rsa* {send -- \r;exp_continue;}
               *empty* {send -- \r;exp_continue;}
               *again* {send -- \r;exp_continue;}
               eof        {exit 0;}
           }";
   }
   
   echo ~~~~~~~~~~~~~~~~~~~~~~~~~~ config local environment ~~~~~~~~~~~~~~~~~~~~~~~~~~
   config_local_env
   
   echo ~~~~~~~~~~~~~~~~~~~~~~~~~~ config remote openssh-clients ~~~~~~~~~~~~~~~~~~~~~~~~~~
   config_remote_openssh_clients
   
   echo ~~~~~~~~~~~~~~~~~~~~~~~~~~ make rsa key ~~~~~~~~~~~~~~~~~~~~~~~~~~
   make_rsa_key
   
   echo ****************************** config ssh auto login ~~~~~~~~~~~~~~~~~~~~~~~~~~
   config_ssh_auto_login_batch
   
   echo ~~~~~~~~~~~~~~~~~~~~~~~~~~ copy and execute config.sh ~~~~~~~~~~~~~~~~~~~~~~~~~~
   for SERVER in $SERVERS
   do
       ssh root@$SERVER mkdir /root/scripts
       scp config.sh root@$SERVER:/root/scripts
       ssh root@$SERVER /root/scripts/config.sh
   done
   

2. 自动配置其他机器：config.sh

   #!/bin/bash
   
   BASE_SERVER=192.168.70.100
   
   yum install -y openssh-clients;
   yum install -y expect;
   yum install -y wget
   
   # Download jdk-8u171-linux-x64.tar.gz
   wget $BASE_SERVER/jdk-8u171-linux-x64.tar.gz
   tar -zxvf jdk-8u171-linux-x64.tar.gz -C /usr/local/bin
   cat >> /etc/profile << EOF
   export JAVA_HOME=/usr/local/bin/jdk1.8.0_171
   export PATH=\$PATH:\$JAVA_HOME/bin
   EOF
   

三、最后

1. 这个脚本的原型源自网络，自己再加工了一下；
2. 内部还有很多改善的地方，后面慢慢改善吧。。。