Liu Junqiao：生产环境中shell脚本实例

Posted 2021-02-17 liujunqiao

在生产环境中，我们时常要注意主机的各种硬件状态，如果是规模较大的服务集群zabbix等健康工具当然好用，如果只是一些小规模的服务主机，shell就会表现的更灵活，也更适用，今天就和大家分享一个系统巡检脚本！

---

 

 1 #!/bin/bash
 2 
 3 function system(){
 4 echo "#########################系统信息#########################"
 5 OS_TYPE=`uname`
 6 OS_VER=`cat /etc/redhat-release`
 7 OS_KER=`uname -a|awk ‘{print $3}‘`
 8 OS_TIME=`date +%F_%T`
 9 OS_RUN_TIME=`uptime |awk ‘{print $3}‘|awk -F, ‘{print $1}‘`
10 OS_LAST_REBOOT_TIME=`who -b|awk ‘{print $2,$3}‘`
11 OS_HOSTNAME=`hostname`
12 
13 echo "    系统类型：$OS_TYPE"
14 echo "    系统版本：$OS_VER"
15 echo "    系统内核：$OS_KER"
16 echo "    当前时间：$OS_TIME"
17 echo "    运行时间：$OS_RUN_TIME"
18 echo "最后重启时间：$OS_LAST_REBOOT_TIME"
19 echo "    本机名称：$OS_HOSTNAME"
20 }
21 function network(){
22 
23 echo "#########################网络信息#########################"
24 INTERNET=(`ifconfig|grep ens|awk -F: ‘{print $1}‘`)
25 for((i=0;i<`echo ${#INTERNET[*]}`;i++))
26 do 
27   OS_IP=`ifconfig ${INTERNET[$i]}|head -2|grep inet|awk ‘{print $2}‘`
28   echo "      本机IP：${INTERNET[$i]}:$OS_IP"
29 done
30 curl -I http://www.baidu.com &>/dev/null
31 if [ $? -eq 0 ]
32 then echo "    访问外网：成功"
33 else echo "    访问外网：失败"
34 fi
35 }
36 
37 function hardware(){
38 
39 echo "#########################硬件信息#########################"
40 CPUID=`grep "physical id" /proc/cpuinfo |sort|uniq|wc -l`
41 CPUCORES=`grep "cores" /proc/cpuinfo|sort|uniq|awk -F: ‘{print $2}‘`
42 CPUMODE=`grep "model name" /proc/cpuinfo|sort|uniq|awk -F: ‘{print $2}‘`
43 
44 echo "     CPU数量: $CPUID"
45 echo "     CPU核心:$CPUCORES"
46 echo "     CPU型号:$CPUMODE"
47 
48 MEMTOTAL=`free -m|grep Mem|awk ‘{print $2}‘`
49 MEMFREE=`free -m|grep Mem|awk ‘{print $7}‘`
50 
51 echo "  内存总容量: ${MEMTOTAL}MB"
52 echo "剩余内存容量: ${MEMFREE}MB"
53 
54 disksize=0
55 swapsize=`free|grep Swap|awk {‘print $2‘}`
56 partitionsize=(`df -T|sed 1d|egrep -v "tmpfs|sr0"|awk {‘print $3‘}`)
57 for ((i=0;i<`echo ${#partitionsize[*]}`;i++))
58 do
59 disksize=`expr $disksize + ${partitionsize[$i]}`
60 done
61 ((disktotal=($disksize+$swapsize)/1024/1024))
62 
63 echo "  磁盘总容量: ${disktotal}GB"
64 
65 diskfree=0
66 swapfree=`free|grep Swap|awk ‘{print $4}‘`
67 partitionfree=(`df -T|sed 1d|egrep -v "tmpfs|sr0"|awk ‘{print $5}‘`)
68 for ((i=0;i<`echo ${#partitionfree[*]}`;i++))
69 do
70 diskfree=`expr $diskfree + ${partitionfree[$i]}`
71 done
72 
73 ((freetotal=($diskfree+$swapfree)/1024/1024))
74 
75 echo "剩余磁盘容量：${freetotal}GB"
76 }
77 
78 
79 function secure(){
80 echo "#########################安全信息#########################"
81 
82 countuser=(`last|grep "still logged in"|awk ‘{print $1}‘|sort|uniq`)
83 for ((i=0;i<`echo ${#countuser[*]}`;i++))
84 do echo "当前登录用户：${countuser[$i]}"
85 done
86  
87 md5sum -c --quiet /opt/passwd.db &>/dev/null
88 if [ $? -eq 0 ]
89 then echo "    用户异常：否"
90 else echo "    用户异常：是"
91 fi
92 }
93 
94 function chksys(){
95 system
96 network
97 hardware
98 secure
99 }

脚本思路：因为监控的信息比较多，所以，用函数将这些功能分成4个模块、system() 系统信息模块、network()网络信息模块、hardware()硬件信息模块、secure()安全信息模块，最后通过chksys()将各个模块调用出来！