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centos7系统巡检

Linux 2298 0 创建时间：2020-11-10 17:27:11

shell脚本系统巡检

#### centos7系统巡检
实用脚本

```shell
#!/bin/bash
##############################################################
# File Name: CenOS7.sh
# Version: V1.0
# Author: hwb
# Created Time : date
# Description: xunjian for centos7
##############################################################

#参数定义
date=`date +"%Y-%m-%d-%H:%M:%S"`
centosVersion=$(awk '{print $(NF-1)}' /etc/redhat-release)
VERSION=`date +%F`
#日志相关
LOGPATH="/tmp/awr"
[ -e $LOGPATH ] || mkdir -p $LOGPATH
RESULTFILE="$LOGPATH/HostCheck-`hostname`-`date +%Y%m%d`.txt"

#调用函数库
[ -f /etc/init.d/functions ] && source /etc/init.d/functions
export PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin
source /etc/profile

#root用户执行脚本
[ $(id -u) -gt 0 ] && echo "请用root用户执行此脚本！" && exit 1

function version(){
    echo ""
    echo ""
    echo "[${date}] >>> `hostname -s` 主机巡检"
}

function getSystemStatus(){
    echo ""
    echo -e "\033[33m****************************************************系统检查****************************************************\033[0m"
    if [ -e /etc/sysconfig/i18n ];then
        default_LANG="$(grep "LANG=" /etc/sysconfig/i18n | grep -v "^#" | awk -F '"' '{print $2}')"
    else
        default_LANG=$LANG
    fi
    export LANG="en_US.UTF-8"
    Release=$(cat /etc/redhat-release 2>/dev/null)
    Kernel=$(uname -r)
    OS=$(uname -o)
    Hostname=$(uname -n)
    SELinux=$(/usr/sbin/sestatus | grep "SELinux status: " | awk '{print $3}')
    LastReboot=$(who -b | awk '{print $3,$4}')
    uptime=$(uptime | sed 's/.*up $[^,]*$, .*/\1/')
    echo "     系统：$OS"
    echo " 发行版本：$Release"
    echo "     内核：$Kernel"
    echo "   主机名：$Hostname"
    echo "  SELinux：$SELinux"
    echo "语言/编码：$default_LANG"
    echo " 当前时间：$(date +'%F %T')"
    echo " 最后启动：$LastReboot"
    echo " 运行时间：$uptime"
    export LANG="$default_LANG"
}

function getCpuStatus(){
    echo ""
    echo -e "\033[33m****************************************************CPU检查*****************************************************\033[0m"
    Physical_CPUs=$(grep "physical id" /proc/cpuinfo| sort | uniq | wc -l)
    Virt_CPUs=$(grep "processor" /proc/cpuinfo | wc -l)
    CPU_Kernels=$(grep "cores" /proc/cpuinfo|uniq| awk -F ': ' '{print $2}')
    CPU_Type=$(grep "model name" /proc/cpuinfo | awk -F ': ' '{print $2}' | sort | uniq)
    CPU_Arch=$(uname -m)
    echo "物理CPU个数:$Physical_CPUs"
    echo "逻辑CPU个数:$Virt_CPUs"
    echo "每CPU核心数:$CPU_Kernels"
    echo "    CPU型号:$CPU_Type"
    echo "    CPU架构:$CPU_Arch"
}

function getMemStatus(){
    echo ""
    echo  -e "\033[33m**************************************************内存检查*****************************************************\033[0m"
    if [[ $centosVersion < 7 ]];then
        free -mo
    else
        free -h
    fi
    #报表信息
    MemTotal=$(grep MemTotal /proc/meminfo| awk '{print $2}')  #KB
    MemFree=$(grep MemFree /proc/meminfo| awk '{print $2}')    #KB
    let MemUsed=MemTotal-MemFree
    MemPercent=$(awk "BEGIN {if($MemTotal==0){printf 100}else{printf \"%.2f\",$MemUsed*100/$MemTotal}}") 
}

function getDiskStatus(){
    echo ""
    echo -e "\033[33m**************************************************磁盘检查******************************************************\033[0m"
    df -hiP | sed 's/Mounted on/Mounted/'> /tmp/inode
    df -hTP | sed 's/Mounted on/Mounted/'> /tmp/disk 
    join /tmp/disk /tmp/inode | awk '{print $1,$2,"|",$3,$4,$5,$6,"|",$8,$9,$10,$11,"|",$12}'| column -t
    #报表信息
    diskdata=$(df -TP | sed '1d' | awk '$2!="tmpfs"{print}') #KB
    disktotal=$(echo "$diskdata" | awk '{total+=$3}END{print total}') #KB
    diskused=$(echo "$diskdata" | awk '{total+=$4}END{print total}')  #KB
    diskfree=$((disktotal-diskused)) #KB
    diskusedpercent=$(echo $disktotal $diskused | awk '{if($1==0){printf 100}else{printf "%.2f",$2*100/$1}}') 
    inodedata=$(df -iTP | sed '1d' | awk '$2!="tmpfs"{print}')
    inodetotal=$(echo "$inodedata" | awk '{total+=$3}END{print total}')
    inodeused=$(echo "$inodedata" | awk '{total+=$4}END{print total}')
    inodefree=$((inodetotal-inodeused))
    inodeusedpercent=$(echo $inodetotal $inodeused | awk '{if($1==0){printf 100}else{printf "%.2f",$2*100/$1}}')
}

function get_resource(){
    echo ""
    echo -e "\033[33m**************************************************资源消耗统计**************************************************\033[0m"

echo -e "\033[36m*************带宽资源消耗统计*************\033[0m"
	#用数组存放网卡名
    nic=(`ifconfig | grep ^[a-z] | grep -vE 'lo|docker0'| awk -F: '{print $1}'`)
	time=`date "+%Y-%m-%d %k:%M"`
	num=0
	
    for ((i=0;i<${#nic[@]};i++))
	do
	   #循环五次，避免看到的是偶然的数据
       while (( $num<5 ))
	   do
	     rx_before=$(cat /proc/net/dev | grep '${nic[$i]}' | tr : " " | awk '{print $2}')
         tx_before=$(cat /proc/net/dev | grep '${nic[$i]}' | tr : " " | awk '{print $10}')
		 sleep 2
		 #用sed先获取第7列,再用awk获取第2列，再cut切割,从第7个到最后，即只切割网卡流量数字部分
         rx_after=$(cat /proc/net/dev | grep '${nic[$i]}' | tr : " " | awk '{print $2}')
         tx_after=$(cat /proc/net/dev | grep '${nic[$i]}' | tr : " " | awk '{print $10}')
		 #注意下面截取的相差2秒的两个时刻的累计和发送的bytes(即累计传送和接收的位)
         rx_result=$[(rx_after-rx_before)/1024/1024/2*8]
         tx_result=$[(tx_after-tx_before)/1024/1024/2*8]
		 echo  "$time Now_In_Speed: $rx_result Mbps  Now_OUt_Speed: $tx_result Mbps" >> /tmp/network.txt
		 let "num++"
	   done
	   #注意下面grep后面的$time变量要用双引号括起来
       rx_result=$(cat /tmp/network.txt|grep "$time"|awk '{In+=$4}END{print In}')
       tx_result=$(cat /tmp/network.txt|grep "$time"|awk '{Out+=$7}END{print Out}')
       In_Speed=$(echo "scale=2;$rx_result/5"|bc)
       Out_Speed=$(echo "scale=2;$tx_result/5"|bc)
       echo -e  "\033[32m In_Speed_average: $In_Speed Mbps Out_Speed_average: $Out_Speed Mbps! \033[0m" 
	done

echo -e "\033[36m*************CPU资源消耗统计*************\033[0m"

#使用vmstat 1 5命令统计5秒内的使用情况，再计算每秒使用情况
	total=`vmstat 1 5|awk '{x+=$13;y+=$14}END{print x+y}'`
	cpu_average=$(echo "scale=2;$total/5"|bc)
	
	#判断CPU使用率（浮点数与整数比较）
	if [ `echo "${cpu_average} > 70" | bc` -eq 1 ];then
	    echo -e  "\033[31m Total CPU is already use: ${cpu_average}%,请及时处理！\033[0m" 
    else 
	    echo -e  "\033[32m Total CPU is already use: ${cpu_average}%! \033[0m" 
    fi

echo -e "\033[36m*************磁盘资源消耗统计*************\033[0m"
    #磁盘使用情况(注意：需要用sed先进行格式化才能进行累加处理)
    disk_used=$(df -m | sed '1d;/ /!N;s/\n//;s/ \+/ /;' | awk '{used+=$3} END{print used}')
    disk_totalSpace=$(df -m | sed '1d;/ /!N;s/\n//;s/ \+/ /;' | awk '{totalSpace+=$2} END{print totalSpace}')
    disk_all=$(echo "scale=4;$disk_used/$disk_totalSpace" | bc)
    disk_percent1=$(echo $disk_all | cut -c 2-3)
    disk_percent2=$(echo $disk_all | cut -c 4-5)
    disk_warning=`df -m | sed '1d;/ /!N;s/\n//;s/ \+/ /;' | awk '{if ($5>85) print $6 "目录使用率：" $5;} '`
    
	echo -e  "\033[32m Total disk has used: $disk_percent1.$disk_percent2% \033[0m" 
    #echo -e "\t\t.." 表示换行
	if [ -n  "$disk_warning" ];then
	    echo -e "\033[31m${disk_warning} \n [Error]以上目录使用率超过85%，请及时处理！\033[0m" 
	fi
	
    echo -e "\033[36m*************内存资源消耗统计*************\033[0m"
	
    #获得系统总内存
	memery_all=$(free -m | awk 'NR==2' | awk '{print $2}')
	#获得占用内存（操作系统 角度）
	system_memery_used=$(free -m | awk 'NR==2' | awk '{print $3}')
	#获得buffer、cache占用内存，当内存不够时会及时回收，所以这两部分可用于可用内存的计算
	buffer_used=$(free -m | awk 'NR==2' | awk '{print $6}')
	cache_used=$(free -m | awk 'NR==2' | awk '{print $7}')
	#获得被使用内存，所以这部分可用于可用内存的计算，注意计算方法
	actual_used_all=$[memery_all-(free+buffer_used+cache_used)]
	#获得实际占用的内存
	actual_used_all=`expr $memery_all - $free + $buffer_used + $cache_used `
    memery_percent=$(echo "scale=4;$system_memery_used / $memery_all" | bc)
    memery_percent2=$(echo "scale=4; $actual_used_all / $memery_all" | bc)
    percent_part1=$(echo $memery_percent | cut -c 2-3)
    percent_part2=$(echo $memery_percent | cut -c 4-5)
    percent_part11=$(echo $memery_percent2 | cut -c 2-3)
    percent_part22=$(echo $memery_percent2 | cut -c 4-5)
    
	#获得占用内存（操作系统角度）
    echo -e "\033[32m system memery is already use: $percent_part1.$percent_part2% \033[0m"
    #获得实际内存占用率
    echo -e "\033[32m actual memery is already use: $percent_part11.$percent_part22% \033[0m"
    echo -e "\033[32m buffer is already used : $buffer_used M \033[0m"
    echo -e "\033[32m cache is already used : $cache_used M \033[0m"
}

function getServiceStatus(){
    echo ""
    echo -e "\033[33m*************************************************服务检查*******************************************************\033[0m"
    echo ""
    if [[ $centosVersion > 7 ]];then
        conf=$(systemctl list-unit-files --type=service --state=enabled --no-pager | grep "enabled")
        process=$(systemctl list-units --type=service --state=running --no-pager | grep ".service")      
    else
        conf=$(/sbin/chkconfig | grep -E ":on|:启用")
        process=$(/sbin/service --status-all 2>/dev/null | grep -E "is running|正在运行")        
    fi
	echo -e "\033[36m******************服务配置******************\033[0m"
    echo "$conf"  | column -t
    echo ""
	echo -e "\033[36m**************正在运行的服务****************\033[0m"
    echo "$process"
}

function getAutoStartStatus(){
    echo ""
    echo -e "\033[33m***********************************************自启动检查*******************************************************\033[0m"
    echo -e "\033[36m****************自启动命令*****************\033[0m"
	conf=$(grep -v "^#" /etc/rc.d/rc.local| sed '/^$/d')
    echo "$conf"  
}

function getLoginStatus(){
    echo ""
    echo -e "\033[33m************************************************登录检查********************************************************\033[0m"
    last | head 
}

function getListenStatus(){
    echo ""
    echo  -e "\033[33m***********************************************监听检查********************************************************\033[0m"
    TCPListen=$(ss -ntul | column -t)
    echo "$TCPListen"
}

function getHowLongAgo(){
    # 计算一个时间戳离现在有多久了
    datetime="$*"
    [ -z "$datetime" ] && echo `stat /etc/passwd|awk "NR==6"`
    Timestamp=$(date +%s -d "$datetime")  
    Now_Timestamp=$(date +%s)
    Difference_Timestamp=$(($Now_Timestamp-$Timestamp))
    days=0;hours=0;minutes=0;
    sec_in_day=$((60*60*24));
    sec_in_hour=$((60*60));
    sec_in_minute=60
    while (( $(($Difference_Timestamp-$sec_in_day)) > 1 ))
    do
        let Difference_Timestamp=Difference_Timestamp-sec_in_day
        let days++
    done
    while (( $(($Difference_Timestamp-$sec_in_hour)) > 1 ))
    do
        let Difference_Timestamp=Difference_Timestamp-sec_in_hour
        let hours++
    done
    echo "$days 天 $hours 小时前"
}

function getPasswordStatus {
    echo ""
    echo -e "\033[33m*************************************************密码检查*******************************************************\033[0m"
    pwdfile="$(cat /etc/passwd)"
    echo ""
    echo -e "\033[36m****************密码过期检查****************\033[0m"
    result=""
    for shell in $(grep -v "/sbin/nologin" /etc/shells);do
        for user in $(echo "$pwdfile" | grep "$shell" | cut -d: -f1);do
            get_expiry_date=$(/usr/bin/chage -l $user | grep 'Password expires' | cut -d: -f2)
            if [[ $get_expiry_date = ' never' || $get_expiry_date = 'never' ]];then
                printf "%-15s 永不过期\n" $user
                result="$result,$user:never"
            else
                password_expiry_date=$(date -d "$get_expiry_date" "+%s")
                current_date=$(date "+%s")
                diff=$(($password_expiry_date-$current_date))
                let DAYS=$(($diff/(60*60*24)))
                printf "%-15s %s天后过期\n" $user $DAYS
                result="$result,$user:$DAYS days"
            fi
        done
    done
    report_PasswordExpiry=$(echo $result | sed 's/^,//')
    echo ""
	echo -e "\033[36m****************密码策略检查****************\033[0m"
    grep -v "#" /etc/login.defs | grep -E "PASS_MAX_DAYS|PASS_MIN_DAYS|PASS_MIN_LEN|PASS_WARN_AGE"
}

function getSudoersStatus(){
    echo ""
    echo -e "\033[33m**********************************************Sudoers检查*******************************************************\033[0m"
    conf=$(grep -v "^#" /etc/sudoers| grep -v "^Defaults" | sed '/^$/d')
    echo "$conf"
    echo ""
}

function getInstalledStatus(){
    echo ""
    echo -e "\033[33m*************************************************软件检查*******************************************************\033[0m"
    rpm -qa --last | head | column -t 
}

function getSyslogStatus(){
    echo ""
    echo -e "\033[33m***********************************************syslog检查*******************************************************\033[0m"
    echo "SYSLOG服务状态：$(getState rsyslog)"
    echo ""
    echo -e "\033[36m***************rsyslog配置******************\033[0m"
    cat /etc/rsyslog.conf 2>/dev/null | grep -v "^#" | grep -v "^\\$" | sed '/^$/d'  | column -t
}

function getFirewallStatus(){
    echo ""
    echo -e "\033[33m***********************************************防火墙检查*******************************************************\033[0m"

echo -e "\033[36m****************防火墙状态******************\033[0m"
    if [[ $centosVersion = 7 ]];then
        systemctl status firewalld >/dev/null  2>&1
        status=$?
        if [ $status -eq 0 ];then
                s="active"
        elif [ $status -eq 3 ];then
                s="inactive"
        elif [ $status -eq 4 ];then
                s="permission denied"
        else
                s="unknown"
        fi
    else
        s="$(getState iptables)"
    fi
    echo "firewalld: $s"
    echo ""
    echo -e "\033[36m****************防火墙配置******************\033[0m"
    cat /etc/sysconfig/firewalld 2>/dev/null
}

function getSNMPStatus(){
    #SNMP服务状态，配置等
    echo ""
    echo -e "\033[33m***********************************************SNMP检查*********************************************************\033[0m"
    status="$(getState snmpd)"
    echo "SNMP服务状态：$status"
    echo ""
    if [ -e /etc/snmp/snmpd.conf ];then
        echo "/etc/snmp/snmpd.conf"
        echo "--------------------"
        cat /etc/snmp/snmpd.conf 2>/dev/null | grep -v "^#" | sed '/^$/d'
    fi
}

function getState(){
    if [[ $centosVersion < 7 ]];then
        if [ -e "/etc/init.d/$1" ];then
            if [ `/etc/init.d/$1 status 2>/dev/null | grep -E "is running|正在运行" | wc -l` -ge 1 ];then
                r="active"
            else
                r="inactive"
            fi
        else
            r="unknown"
        fi
    else
        #CentOS 7+
        r="$(systemctl is-active $1 2>&1)"
    fi
    echo "$r"
}

function getNTPStatus(){
    #NTP服务状态，当前时间，配置等
    echo ""
    echo -e "\033[33m***********************************************NTP检查**********************************************************\033[0m"
    if [ -e /etc/ntp.conf ];then
        echo "NTP服务状态：$(getState ntpd)"
        echo ""
        echo -e "\033[36m*************NTP服务配置******************\033[0m"
        cat /etc/ntp.conf 2>/dev/null | grep -v "^#" | sed '/^$/d'
    fi
}

function check(){
    version
    getSystemStatus
	get_resource
    getCpuStatus
    getMemStatus
    getDiskStatus
    getNetworkStatus
    getListenStatus
    getProcessStatus
    getServiceStatus
    getAutoStartStatus
    getLoginStatus
    getCronStatus
    getUserStatus
    getPasswordStatus
    getSudoersStatus
    getFirewallStatus
    getSSHStatus
    getSyslogStatus
    getSNMPStatus
    getNTPStatus
    getInstalledStatus
}
#执行检查并保存检查结果
check > $RESULTFILE
echo -e "\033[44;37m 主机巡检结果存放在：$RESULTFILE   \033[0m"

#上传检查结果的文件
#curl -F "filename=@$RESULTFILE" "$uploadHostDailyCheckApi" 2>/dev/null
cat $RESULTFILE
```

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