SHELL脚本生产案例集锦

Posted 2021-02-09

1、LVS客户端自动配置
#/bin/bash
VIP=(202.106.195.111 202.106.195.222)
[ -e /etc/sysctl.conf ]&&rm -f /etc/sysctl.conf
[ -e /etc/sysconfig/network-scripts/ifcfg-lo:0 ]&&rm -f /etc/sysconfig/network-scripts/ifcfg-lo:0
[ -e /etc/sysconfig/network-scripts/ifcfg-lo:1 ]&&rm -f /etc/sysconfig/network-scripts/ifcfg-lo:1

echo "net.ipv4.conf.all.arp_ignore = 1">/etc/sysctl.conf
echo "net.ipv4.conf.all.arp_announce = 2">>/etc/sysctl.conf
echo "net.ipv4.conf.default.arp_ignore = 1">>/etc/sysctl.conf
echo "net.ipv4.conf.default.arp_announce = 2">>/etc/sysctl.conf
echo "net.ipv4.conf.lo.arp_ignore = 1">>/etc/sysctl.conf
echo "net.ipv4.conf.lo.arp_announce = 2">>/etc/sysctl.conf
sysctl -p &>/dev/null

cd /etc/sysconfig/network-scripts
for ((i=0;i<echo ${#VIP[*]};i++))
do
cp ifcfg-lo ifcfg-lo:$i
echo "DEVICE=lo:$i">ifcfg-lo:$i
echo "IPADDR=${VIP[$i]}">>ifcfg-lo:$i
echo "NETMASK=255.255.255.255">>ifcfg-lo:$i
echo "ONBOOT=yes">>ifcfg-lo:$i
ifup ifcfg-lo:$i
/usr/sbin/route add -host ${VIP[$i]} dev lo:$i &>/dev/null
done

2、企业日常巡检

#!/bin/bash

function system(){
echo "#########################系统信息#########################"
OS_TYPE=uname
OS_VER=cat /etc/redhat-release
OS_KER=uname -a|awk ‘{print $3}‘
OSTIME=`date +%F%T<br/>OS_RUN_TIME=uptime |awk ‘{print $3}‘|awk -F, ‘{print $1}‘<br/>OS_LAST_REBOOT_TIME=who -b|awk ‘{print $2,$3}‘<br/>OS_HOSTNAME=hostname`

echo " 系统类型：$OS_TYPE"
echo " 系统版本：$OS_VER"
echo " 系统内核：$OS_KER"
echo " 当前时间：$OS_TIME"
echo " 运行时间：$OS_RUN_TIME"
echo "最后重启时间：$OS_LAST_REBOOT_TIME"
echo " 本机名称：$OS_HOSTNAME"
}
function network(){

echo "#########################网络信息#########################"
INTERNET=(ifconfig|grep ens|awk -F: ‘{print $1}‘)
for((i=0;i<echo ${#INTERNET[*]};i++))
do
OS_IP=ifconfig ${INTERNET[$i]}|head -2|grep inet|awk ‘{print $2}‘
echo " 本机IP：${INTERNET[$i]}:$OS_IP"
done
curl -I http://www.baidu.com &>/dev/null
if [ $? -eq 0 ]
then echo " 访问外网：成功"
else echo " 访问外网：失败"
fi
}

function hardware(){

echo "#########################硬件信息#########################"
CPUID=grep "physical id" /proc/cpuinfo |sort|uniq|wc -l
CPUCORES=grep "cores" /proc/cpuinfo|sort|uniq|awk -F: ‘{print $2}‘
CPUMODE=grep "model name" /proc/cpuinfo|sort|uniq|awk -F: ‘{print $2}‘

echo " CPU数量: $CPUID"
echo " CPU核心:$CPUCORES"
echo " CPU型号:$CPUMODE"

MEMTOTAL=free -m|grep Mem|awk ‘{print $2}‘
MEMFREE=free -m|grep Mem|awk ‘{print $7}‘

echo " 内存总容量: ${MEMTOTAL}MB"
echo "剩余内存容量: ${MEMFREE}MB"

disksize=0
swapsize=free|grep Swap|awk {‘print $2‘}
partitionsize=(df -T|sed 1d|egrep -v "tmpfs|sr0"|awk {‘print $3‘})
for ((i=0;i<echo ${#partitionsize[*]};i++))
do
disksize=expr $disksize + ${partitionsize[$i]}
done
((disktotal=($disksize+$swapsize)/1024/1024))

echo " 磁盘总容量: ${disktotal}GB"

diskfree=0
swapfree=free|grep Swap|awk ‘{print $4}‘
partitionfree=(df -T|sed 1d|egrep -v "tmpfs|sr0"|awk ‘{print $5}‘)
for ((i=0;i<echo ${#partitionfree[*]};i++))
do
diskfree=expr $diskfree + ${partitionfree[$i]}
done

((freetotal=($diskfree+$swapfree)/1024/1024))

echo "剩余磁盘容量：${freetotal}GB"
}

function secure(){
echo "#########################安全信息#########################"

countuser=(last|grep "still logged in"|awk ‘{print $1}‘|sort|uniq)
for ((i=0;i<echo ${#countuser[*]};i++))
do echo "当前登录用户：${countuser[$i]}"
done

md5sum -c --quiet /opt/passwd.db &>/dev/null
if [ $? -eq 0 ]
then echo " 用户异常：否"
else echo " 用户异常：是"
fi
}

function chksys(){
system
network
hardware
secure
}

3、检测网站地址是否存活

#!/bin/bash
. /etc/init.d/functions
url_list=(www.tec.com www.stu.com)

function chkurl(){
i=0
while [ $i -lt 2 ]
do
curl http://${url_list[$i]} &>/dev/null
if [ $? -eq 0 ]
then
action "${url_list[$i]}" /bin/true
else
action "${url_list[$i]}" /bin/false
fi
let i++
done
}

function main(){
while true
do chkurl
sleep 3
done
}
main

4、LVS节点健康检查

#!/bin/bash
VIP=202.106.195.1
PORT=80
RIP=(192.168.100.10 192.168.100.20)

while true
do
for ((i=0;i<echo ${#RIP[*]};i++))
do
code=curl -I -m 10 -o /dev/null -s -w %{http_code} http://${RIP[$i]}
if [ $code -ne 200 -a $(ipvsadm -Ln|grep ${RIP[$i]}|wc -l) -eq 1 ]
then ipvsadm -d -t $VIP:$PORT -r ${RIP[$i]}:$PORT
elif [ $code -eq 200 -a $(ipvsadm -Ln|grep ${RIP[$i]}|wc -l) -lt 1 ]
then ipvsadm -a -t $VIP:$PORT -r ${RIP[$i]}:$PORT
fi
done
sleep 5
done

5、Keepalived监控服务

#!/bin/bash
while true
do
if [ $(pidof httpd|wc -l) -eq 1 -a $(pidof keepalived|wc -l) -eq 0 ]
then systemctl start keepalived
fi

pidof httpd &>/dev/null
if [ $? -ne 0 ]
then systemctl start httpd &>/dev/null
fi
sleep 3

pidof httpd &>/dev/null
if [ $? -ne 0 ]
then systemctl stop keepalived
fi
sleep 3
done

6、mysql建库建表插入数据

#!/bin/bash
user="root"
password="123456"
mycmd="mysql -u$user -p$password"

for dbname in tec stu
do
$mycmd -e "create database $dbname;"
$mycmd -e "use $dbname;create table test(id int,name varchar(18));insert into test values(1,‘rainman‘);"
done

7、mysql分库分表备份

#!/bin/bash
user="root"
password="123456"
mycmd="mysql -u$user -p$password -h 192.168.100.1"
mydump="mysqldump -u$user -p$password -h 192.168.100.1 --lock-tables=0"

for dbname in $mycmd -e "show databases;"|egrep -v "Database|schema"

do
[ -d /opt/$dbname ]||mkdir -p /opt/$dbname
for tabname in $mycmd -e "show tables from $dbname"|sed 1d
do $mydump $dbname $tabname > /opt/$dbname/${tabname}_$(date +%F).sql
done
done

8、检测MySQL主从复制是否异常

#!/bin/bash
user="root"
password="123456"
mycmd="mysql -u$user -p$password -h 192.168.100.20"

function chkdb() {
list=($($mycmd -e "show slave status G"|egrep "Running|Behind"|awk -F: ‘{print $2}‘))
if [ ${list[0]} = "Yes" -a ${list[1]} = "Yes" -a ${list[2]} -lt 120 ]
then echo "Mysql slave is ok"
else echo "Mysql slave replation is filed"
fi
}

function main() {
while true
do chkdb
sleep 3
done
}
main

9、mysql日志切割

#!/bin/bash

logfile=/var/log/httpd/access_log
pid=/run/httpd/httpd.pid

mv $logfile /opt/access_$(date -d "yesterday" +"%Y-%m-%d").log
kill -USR1 $(cat $pid)

size=du -sh /opt|awk ‘{print $1}‘|awk -F "M" ‘{print $1}‘

if [ $size -gt 1000 ]
then find /opt -type f -name access* -mtime +30 -exec rm -f {} ;
fi

10、防DOS***-网络连接法

#!/bin/bash
netstat -antup|grep SYN_RECV|awk ‘{print $5}‘|awk -F: ‘{print $1}‘|sort|uniq -c>/opt/tmp
exec</opt/tmp
while read line
do
count=echo $line|awk ‘{print $1}‘
ip=echo $line |awk ‘{print $2}‘
if [ $count -gt 128 ]
then iptables -I INPUT -s $ip -j DROP
fi
done

11、***检测与邮件报警

#!/bin/bash
webdir=/var/www/html
cd $webdir
md5sum -c --quiet /opt/sumfile.db &>/opt/sum_err.log
if [ $? -ne 0 ]
then
echo "the file_sum is changed"
mail -s "sum_error" [email protected] </opt/sum_err.log
else
echo "check file_sum is ok"
fi

find /var/www/html/ -type f >/opt/countfile.dbsec
diff /opt/countfile.db &>/opt/counterr.log
if [ $(diff /opt/countfile.db|wc -l) -gt 0 ]
then
echo "the file_count is changed"
mail -s "count_err" [email protected] </opt/count_err.log
else
echo "check file_count is ok"
fi

12、企业微信报警

function sendmsg() {

CorpID="ww3c6298264d839e2f"
Secret="YvyMQpMRIoXtdQRWo0RNkMBTZnHWKvBwC3ILkyuCsKQ"
agentid=1000002

GURL="https://qyapi.weixin.qq.com/cgi-bin/gettoken?corpid=$CorpID&corpsecret=$Secret"
Gtoken=$(/usr/bin/curl -s -G $GURL|awk -F" ‘{print $10}‘)

#echo $Gtoken
PURL="https://qyapi.weixin.qq.com/cgi-bin/message/send?access_token=$Gtoken"

Ip=$(ip a |grep ens33 |grep inet|awk -F "/" ‘{ print $1 }‘ |awk -F " " ‘{ print $2 }‘)

/usr/bin/curl --data-ascii ‘{
"touser": "@all",
"toparty": "2",
"msgtype": "text",
"agentid": "1000002",
"text": {"content": "‘"警告:[$msg] 主机:[uname -n] 日期:[$(date +%F-%T)] 地址:[$Ip]"‘"},
"safe":"0"

}‘ $PURL >/dev/null 2>&1
}