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  • Centos7系统初始化脚本

    前言:

      因公司业务增加,陆续新增服务器,时不时的来几台,手动地一台台对服务器初始化操作感觉太麻烦。

      于是乎,根据初始化需求整合了一个初始化脚本,实现批量脚本初始化操作。

    说明:

      本脚本根据自身需求编写而成,集成了Centos7服务器的基本初始化步骤。

      其中包含如下基础优化内容:

      1)SELinux关闭;

      2)Firewalld关闭;

      3)Bash环境修改;

      4)Openfile系统最大打开文件数配置;

      5)系统内核参数优化配置;

      6)Hostname主机名修改;

      7)History历史记录配置;

      8)个性化配置等。

    注意:

      A)脚本执行完后将自动重启服务器;

      B)执行脚本前应在/etc/hosts中配置好对应的解析,如 10.10.10.10 kazihuo 内容添加到hosts文件中,执行完脚本后,服务器10.10.10.10将自动将Hostname主机名配置成 “kazihuo” ;

      C)确保存在 /tmp/sysctl.conf 文件,即将已配置好的Kernel内核优化参数文件放置 /tmp 目录下,执行完脚本后,其优化参数将自动配置到服务器中;如无优化文件,即在最后的函数中注释137行 Kernel 即可;

    内容:

      脚本内容如下:

    [root@kazihuo ~]# cat init.sh

      1 #!/bin/bash
      2 #====================================================
      3 # Author: kazihuo
      4 # Blog: https://www.cnblogs.com/kazihuo
      5 # Create Date: 2019-01-24
      6 # Description: It works for system initalization.
      7 #====================================================
      8 
      9 #State:Plese confirm the files of /etc/hosts and /tmp/sysctl.conf before using the script
     10 
     11 [ -f /etc/init.d/functions ] && source /etc/init.d/functions
     12 
     13 # Defined result function
     14 function Msg(){
     15     if [ $? -eq 0 ];then
     16         action "$1" /bin/true
     17     else 
     18         action "$1" /bin/false
     19     fi
     20 }
     21 
     22 # Defined close selinux function
     23 function Selinux(){
     24     [ -f /etc/selinux/config ] && {
     25     sed -i 's/SELINUX=enforcing/SELINUX=disabled/g' /etc/selinux/config
     26     setenforce 0
     27     Msg "Close selinux"
     28     }
     29 }
     30 
     31 # Defined close firewalld function
     32 function Firewalld(){
     33     systemctl stop firewalld.service
     34     systemctl disable firewalld.service  >/dev/null 2>&1
     35     Msg "Close firewalld"
     36 }
     37 
     38 # Defined bashrc function
     39 function Bashrc(){
     40     sed -i 's/\h \W/\h \w/g' /etc/bashrc
     41     Msg "Bashrc"
     42 }
     43 
     44 # Defined open files function for Centos6.
     45 function Openfile6(){
     46     if [ `egrep "^*" /etc/security/limits.conf|wc -l` -eq 0 ];then
     47         echo '* - nofile 65535' >> /etc/security/limits.conf
     48         ulimit -SHn 65535
     49         Msg "Open files" 
     50     fi
     51 }
     52 
     53 # Defined open files function for Centos7.
     54 function Openfile7(){
     55     if [ `egrep "^De" /etc/systemd/system.conf|wc -l` -eq 0 ];then
     56         echo 'DefaultLimitCORE=infinity' >> /etc/systemd/system.conf
     57         echo 'DefaultLimitNOFILE=100000' >> /etc/systemd/system.conf
     58         echo 'DefaultLimitNPROC=100000' >> /etc/systemd/system.conf
     59         ulimit -SHn 100000
     60         Msg "Open files" 
     61     fi
     62 }
     63 
     64 # Defined kernel paramters function
     65 function Kernel(){
     66     if [ -f /tmp/sysctl.conf ];then 
     67         /usr/bin/cp /etc/sysctl.conf /etc/sysctl.conf.$RANDOM
     68         /usr/bin/cp /tmp/sysctl.conf /etc/
     69         sysctl -p >/dev/null 2>&1
     70         Msg "kernel paramters"
     71     else
     72         echo "/tmp/sysctl.conf is not exist"
     73     fi
     74 }
     75 
     76 # Defined hostname function
     77 function Hostname(){
     78     ip=`/usr/sbin/ip addr|grep brd|awk 'NR==3{print $2}'|awk -F "/" '{print $1}'`
     79     name=`grep -w "$ip" /etc/hosts|awk '{print $2}'`
     80     if [ -z $name ];then
     81         sleep 1
     82     else
     83         echo $name > /etc/hostname
     84         hostnamectl set-hostname $name
     85         Msg "Hostname"
     86     fi
     87 }
     88 
     89 # Defined device function
     90 function Device(){
     91     /usr/sbin/ip addr|grep eth0  >/dev/null
     92     RETVAL=$?
     93     if [ $RETVAL -ne 0 ];then
     94         /usr/bin/mv /etc/sysconfig/network-scripts/ifcfg-e* /etc/sysconfig/network-scripts/ifcfg-eth0 >/dev/null 2>&1
     95         sed -i 's/quiet/quiet net.ifnames=0 biosdevname=0/g' /etc/default/grub
     96         sed -i 's/^DEVICE/#DEVICE/g' /etc/sysconfig/network-scripts/ifcfg-e*
     97         sed -i '1i DEVICE=eth0' /etc/sysconfig/network-scripts/ifcfg-e*
     98         /usr/sbin/grub2-mkconfig -o /boot/grub2/grub.cfg >/dev/null 2>&1
     99         Msg "Device--[WARNING]effecting after reboot~~~"
    100     else
    101         echo "the name of eths is exist"
    102     fi
    103 }
    104 
    105 # History collect
    106 function History(){
    107     cat >>/etc/profile.d/history.sh <<EOF
    108 #history
    109 USER=\`whoami\`
    110 USER_IP=\`who -u am i 2>/dev/null|egrep -o "([0-9]{1,3}\.){3}[0-9]{1,3}"\`
    111 if [ "$USER_IP" = "" ]; then
    112 USER_IP=\`hostname\`
    113 fi
    114 if [ ! -d /var/log/history ]; then
    115 mkdir /var/log/history
    116 chmod 777 /var/log/history
    117 fi
    118 if [ ! -d /var/log/history/${LOGNAME} ]; then
    119 mkdir /var/log/history/${LOGNAME}
    120 chmod 300 /var/log/history/${LOGNAME}
    121 fi
    122 export HISTSIZE=4096
    123 DT=\`date +"%Y%m%d_%H:%M:%S"\`
    124 export HISTFILE="/var/log/history/${LOGNAME}/${USER}@${USER_IP}_$DT"
    125 chmod 600 /var/log/history/${LOGNAME}/*history* 2>/dev/null
    126 EOF
    127     Msg "History collect"
    128 }
    129 
    130 # Defined the hobby.
    131 function Hobby(){
    132     mkdir -p /{luomurui,luomurui-bak}/{scr,pkg,test,info}
    133 }
    134 
    135 # Defined wait function
    136 function Wait(){
    137     echo ""
    138     echo -n -e "33[31mTHE SYSTEM IS REBOOTING33[0m"
    139     for ((i=0;i<3;i++))
    140     do
    141         echo -n "~~ "
    142         sleep 1
    143     done
    144     echo 
    145 }
    146 
    147 # Defined main function
    148 function main(){
    149 Selinux
    150 Firewalld
    151 Bashrc
    152 #Openfile6
    153 Openfile7
    154 Kernel
    155 Hostname
    156 #Device
    157 History
    158 Hobby
    159 Wait 
    160 reboot
    161 }
    162 main

      若有其他需求,可以其为基底进行个性化修改!

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  • 原文地址:https://www.cnblogs.com/kazihuo/p/10313219.html
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