6. 一键优化脚本
最后更新于：2022-04-02 07:42:48
#### 20191223 当前模版，容器镜像方式，脚本优化不需要太复杂，废弃了
>### 备注：使用前请阅读并测试
>内核优化部分感谢[海渊_haiyuan的博客](http://blog.csdn.net/ll845876425)
>早期脚本原型感谢suzezhi，抱歉当时未收藏博客
>20170918更新了Centos7的优化脚本，相关内容也更新到了Cobbler脚本调用中
### Centos 7 一键优化
#### 为了后期调用，分为公共函数，自定义函数和主文件
##### centos7_optimiz.sh
```shell
#!/bin/sh
#Author: NoteD
#Date: 2017-05-3
#Remark: Centos 7 system optimization script
# Shell variables #
script_logdir="/var/log/"
shell_name=$(basename $0)
shell_logfile="$script_logdir/${shell_name}.log"
# System variables
create_basdir="/data/ "
local_repo_name="cobbler-config.repo"
install_basesoft="gcc gcc-c++ ntp lrzsz tree telnet dos2unix sysstat sysstat iptraf ncurses-devel openssl-devel zlib-devel OpenIPMI-tools nmap screen nfs-utils"
system_user="ding"
user_id="2017"
system_user_password="ding@)!&"
ssh_port="52020"
ntp_server="202.120.2.101"
ctrlaltdel="/usr/lib/systemd/system/ctrl-alt-del.target"
# Set Check shell
system_user_check=`cat /etc/passwd |grep ${system_user} |wc -l`
system_openfile_check=`ulimit -a |grep "open files"|awk '{print $4}'`
system_kernel_check=`grep "NoteD" /etc/sysctl.conf|wc -l`
ntpdate_check=`grep "ntpdate" /var/spool/cron/root|wc -l`
check_shell=`grep "PS1" /etc/profile|wc -l`
# Load function
. ./custom_fun.sh
. ./public_fun.sh
# Exec
function_check_uid
function_create_basedir
function_set_repo
function_install_basesoft
function_create_user
function_set_openfile
function_disable_ctlaltdel
function_disable_selinux
function_set_ssh
function_disable_ipv6
function_set_kernel
function_set_ntp
function_set_shell
function_set_vim
```
##### custom_fun.sh
```shell
#Customize Function: Create basedir
function_create_basedir(){
mkdir -p ${create_basdir}
function_writelog_judgment "[create basedir]"
}
#Customize Function: set yum repo
function_set_repo(){
#clean OS default repo
mkdir /etc/yum.repos.d/old && mv /etc/yum.repos.d/C* /etc/yum.repos.d/old/
if [ ! -f "/etc/yum.repos.d/${local_repo_name}" ];then
#add repo
wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo
function_writelog_judgment "[add aliyun mirrors base]"
wget -O /etc/yum.repos.d/epel.repo http://mirrors.aliyun.com/repo/epel-7.repo
function_writelog_judgment "[add aliyun mirrors epel]"
#rpm -ivh http://repo.zabbix.com/zabbix/3.0/rhel/7/x86_64/zabbix-release-3.0-1.el7.noarch.rpm
fi
# update system soft
yum clean all
yum -y update
function_writelog_judgment "[update system]"
}
#Customize Function: install base soft
function_install_basesoft(){
yum -y install ${install_basesoft}
function_writelog_judgment "[install basesoft]"
}
#Customize Function: create user
function_create_user(){
if [ ${system_user_check} -eq 0 ];then
#add default user
useradd ${system_user} -u ${user_id}
function_writelog_judgment "[add user ${system_user}]"
echo "${system_user_password}" | passwd --stdin ${system_user} && history -c
function_writelog_judgment "[set ${system_user} password]"
#set sudo authority
echo "" >> /etc/sudoers
echo "#set sudo authority" >> /etc/sudoers
echo "${system_user} ALL=(ALL) NOPASSWD:ALL" >> /etc/sudoers
fi
function_writelog_judgment "[set user sudo]"
}
#Customize Function: set open file
function_set_openfile(){
if [ ${system_openfile_check} -lt 65535 ];then
#set the file limit
cat >> /etc/security/limits.conf << EOF
* soft nofile 65535
* hard nofile 65535
EOF
fi
function_writelog_judgment "[set system openfile]"
}
#Customize Function: disable server
function_disable_ctlaltdel(){
if [ -f ${ctrlaltdel} ];then
#disable control-alt-delete
mv /usr/lib/systemd/system/ctrl-alt-del.target /usr/lib/systemd/system/ctrl-alt-del.target.bak
function_writelog_judgment "[disable ctrl+alt+del]"
fi
}
function_disable_selinux(){
#disable selinux
sed -i 's/SELINUX=enforcing/SELINUX=disabled/' /etc/selinux/config
function_writelog_judgment "[disable selinux]"
}
#Customize Function: set ssh
function_set_ssh(){
#set ssh
\cp /etc/ssh/sshd_config /etc/ssh/sshd_config.`date +%F`
sed -i "s/^GSSAPIAuthentication yes$/GSSAPIAuthentication no/" /etc/ssh/sshd_config
sed -i "s/#UseDNS yes/UseDNS no/" /etc/ssh/sshd_config
sed -i "s%#PermitRootLogin yes%PermitRootLogin no%g" /etc/ssh/sshd_config
sed -i "s%#PermitEmptyPasswords no%PermitEmptyPasswords no%g" /etc/ssh/sshd_config
#sed -i "s%#Port 22%Port ${ssh_port} %g" /etc/ssh/sshd_config
function_writelog_judgment "[set ssh]"
}
#Customize Function: disable ipv6
function_disable_ipv6(){
if [ `ip addr|grep inet6|wc -l ` -gt 0 ]; then
sed -i 's%^IPV6INIT="yes"%IPV6INIT="no"%g' /etc/sysconfig/network-scripts/ifcfg-eth0
#sed -i 's%^IPV6INIT="yes"%IPV6INIT="no"%g' /etc/sysconfig/network-scripts/ifcfg-eth1
#sed -i 's%^IPV6INIT="yes"%IPV6INIT="no"%g' /etc/sysconfig/network-scripts/ifcfg-eth2
#sed -i 's%^IPV6INIT="yes"%IPV6INIT="no"%g' /etc/sysconfig/network-scripts/ifcfg-eth3
echo "NETWORKING_IPV6=off" >> /etc/sysconfig/network
fi
function_writelog_judgment "[disable ipv6]"
}
#Customize Function: set kernel
function_set_kernel(){
if [ ${system_kernel_check} -eq 0 ];then
#tune kernel parametres
cat >> /etc/sysctl.conf << EOF
#20170914 NoteD update
net.ipv4.tcp_tw_recycle = 1
net.ipv4.tcp_tw_reuse = 1
net.ipv4.ip_local_port_range = 10000 65000
net.ipv4.tcp_syncookies = 1
net.ipv4.tcp_max_tw_buckets = 36000
net.ipv4.tcp_max_syn_backlog = 16384
net.ipv4.tcp_keepalive_time = 600
net.ipv4.tcp_fin_timeout = 30
vm.swappiness=10
vm.max_map_count = 262144
net.ipv6.conf.all.disable_ipv6=1
EOF
/sbin/sysctl -p
function_writelog_judgment "[set sysctl]"
fi
}
#Customize Function: set ntp
function_set_ntp(){
if [ ${ntpdate_check} -eq 0 ]; then
echo "* 4 * * * /usr/sbin/ntpdate ${ntp_server}> /dev/null 2>&1" >> /var/spool/cron/root
fi
function_writelog_judgment "[add ntp]"
}
#Customize Function: set shell
function_set_shell(){
if [ ${check_shell} -eq 0 ]; then
#modify PS1
echo 'export PS1="[ \033[01;33m\u\033[0;36m@\033[01;34m\h \033[01;31m\w\033[0m ]\033[0m \n#"' >> /etc/profile
function_writelog_judgment "[set shell]"
fi
}
#Customize Function: set vim
function_set_vim(){
if [ ! -f /root/.vimrc ]; then
#modify vimrc
cat >> /root/.vimrc << EOF
syntax enable
syntax on
set ruler
set number
set cursorline
set cursorcolumn
set hlsearch
set incsearch
set ignorecase
set nocompatible
set wildmenu
set paste
set expandtab
set tabstop=2
set shiftwidth=4
set softtabstop=4
set gcr=a:block-blinkon0
set guioptions-=l
set guioptions-=L
set guioptions-=r
set guioptions-=R
highlight CursorLine cterm=NONE ctermbg=black ctermfg=green guibg=NONE guifg=NONE
highlight CursorColumn cterm=NONE ctermbg=black ctermfg=green guibg=NONE guifg=NONE
EOF
cp /root/.vimrc /home/${system_user}/
fi
function_writelog_judgment "[set vim]"
}
```
##### public_fun.sh（部分函数未使用）
```shell
#Public Function: judgment lockfile
function_create_lockfile(){
if [ -f $shell_lockfile ];then
function_writelog_simple "[Warning] The script is running！ please wait."
exit
else
echo $$ > $shell_lockfile
fi
}
#Public Function: directly_delete shell lockfile
function_delete_lockfile(){
rm -f ${shell_lockfile} && exit 1
}
#Public Function: judgment after delete shell lockfile
function_judgment_delete_lockfile(){
if [ $? -ne 0 ];then
function_delete_lockfile
exit
fi
}
#Public Function: judgment and write Log
function_writelog_judgment(){
if [ $? -eq 0 ];then
log_info=$1
echo "$(date "+%Y-%m-%d") $(date "+%H-%M-%S") [Note]: ${shell_name} : ${log_info} executed sucessfully" >> ${shell_logfile}
else
echo "$(date "+%Y-%m-%d") $(date "+%H-%M-%S") [Error]: ${shell_name} : ${log_info} executed failed" |tee -a ${shell_logfile}
exit
fi
}
#Public Function: simple write Log
function_writelog_simple(){
log_info=$1
echo "$(date "+%Y-%m-%d") $(date "+%H-%M-%S") : ${shell_name} : ${log_info} " >> ${shell_logfile}
}
#Public Function: judgment UID
function_check_uid(){
if [ $UID -eq 0 ];then
return 0
else
echo "Please use root run script."
exit 1
fi
}
function_check_network(){
if [ `curl -s -w %{http_code} http://www.baidu.com -o /dev/null` -ne 200 ];then
function_writelog_simple "network "
exit
else
echo $$ > $shell_lockfile
fi
}
```
### Centos 6 一键优化(由于时间关系，6.x的优化没有做完全转化)
centos6_optimiz.sh
```shell
#crond clean mail file
echo "find /var/spool/clientmqueue/ -type f -mtime +30 |xargs rm -f" > /app/scripts/del_clientmqueue.sh
chmod +x /app/scripts/del_clientmqueue.sh
echo "00 00 * * 6 /bin/sh /server/scripts/del_clientmqueue.sh >/dev/null 2>&1" >> /var/spool/cron/root
#update system character
cp /etc/sysconfig/i18n /etc/sysconfig/i18n.Brandyn
echo 'LANG="en_US.UTF-8"' >/etc/sysconfig/i18n
source /etc/sysconfig/i18n
#set the control-alt-delete to guard against the miSUSE
mv /etc/init/control-alt-delete.conf /etc/init/control-alt-delete.conf.bak
#disabel service
LANG=en
for chkoff in `chkconfig --list|grep 3:on|awk '{print $1}'`;do chkconfig --level 3 $chkoff off;done
for chkoff in crond network rsyslog sshd;do chkconfig --level 3 $chkoff on;done
```
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