实战：运维必备Linux巡检脚本

巡检意义

及时发现隐患：对服务器进行巡检能够及时发现服务器的隐患，以便于改善和优化服务器的性能。

观察运行状况：观察服务器的运行状况，及时对设备进行调整，保证服务器的24小时不间断的工作。

采集网内服务器信息：通过巡检，可以采集网内服务器信息，了解服务器的配置和运行情况。

提高效率：使用巡检脚本可以有效地减少人力、物力和时间成本，提高巡检效率。

保证全面性和准确性：人工巡检很容易出现疏漏和错误，而巡检脚本可以自动化处理巡检任务，避免疏漏和错误，保证巡检的全面性和准确性。

确保服务器安全性：巡检脚本可以扫描服务器的安全漏洞，及时发现风险，减少服务器被攻击的可能性，确保服务器安全性。

巡检脚本

vim /root/dean.sh

#! /bin/bash# Author：Dean# Web：https://www.bunian.cn# 微信公众号：不念博客#color notesNC='33[0m'GREEN='33[0;32m'RED='33[0;31m'YELLOW='33[0;33m'cyan='33[0;36m'yellow='33[0;33m'#Sectioning .........echo -e "${YELLOW}---------------------------------------------------------------------------------------------------------------${NC}"echo "Server details:"echo -e "${YELLOW}---------------------------------------------------------------------------------------------------------------${NC}"#fetching basic specs from the server(user,ip,os)user=`whoami`echo -e "${cyan}User:${NC} $user"hostname=`hostname`echo -e "${cyan}hostname:${NC} $hostname"ip=`hostname -I`echo -e "${cyan}IP address:${NC} $ip"os=`cat /etc/os-release | grep 'NAME|VERSION' | grep -v 'VERSION_ID' | grep -v 'PRETTY_NAME' | grep NAME`echo -e "${cyan}OS:${NC} $os"#Sectioning.....echo -e "${YELLOW}---------------------------------------------------------------------------------------------------------------${NC}"echo "Service status:"echo -e "${YELLOW}---------------------------------------------------------------------------------------------------------------${NC}"sleep 1#checking tomcat statusecho -e "${yellow}1) Tomcat${NC}"#grepping tomcat status from ps auxpp=`ps aux | grep tomcat | grep "[D]java.util"`if [[ $pp =~ "-Xms512M" ]];then echo -e " Status: ${GREEN}UP${NC}"else echo -e " Status: ${RED}DOWN${NC}"fiecho ""#function to check apache is running or not!function apache(){echo -e "${yellow}2) Apache-httpd${NC}"#grepping apache status from ps auxhttpd=`ps aux | grep httpd | grep apache`if [[ $httpd =~ "apache" ]];then echo -e " Status: ${GREEN}UP${NC}"else echo -e " Status: ${RED}DOWN${NC}"fi}#function to check elastic is running or notfunction elastic(){echo -e "${yellow}3) Elasticsearch${NC}"#grepping elasticsearch status from ps auxelastic=`ps aux | grep elasticsearch`if [[ $elastic =~ "elastic+" ]];thenecho -e " Status: ${GREEN}UP${NC}"else echo -e "Status: ${RED}DOWN${NC}"fi#function to check mysql is running or not}function mysql(){echo -e "${yellow}4) Mysql${NC}"#grepping mysql status from ps auxmysql=`ps aux | grep mysqld`if [[ $mysql =~ "mysqld" ]];then echo -e " Status: ${GREEN}UP${NC}"else echo -e " Status: ${RED}DOWN${NC}"fi}function docker(){echo -e "${yellow}5) Docker${NC}"#grepping docker status from ps auxdocker=`systemctl status docker | grep dead`if [[ $docker =~ "dead" ]];then echo -e " Status: ${GREEN}UP${NC}"else echo -e " Status: ${RED}DOWN${NC}"fi}#calling functionsapacheecho ""elasticecho ""mysqlecho ""dockerecho ""#Sectioning............#Fetching mem and cpu informationsecho -e "${YELLOW}---------------------------------------------------------------------------------------------------------------${NC}"echo "Memory Details:"echo -e "${YELLOW}---------------------------------------------------------------------------------------------------------------${NC}"sleep 1#view mem infofree -h#get uptime detailsuptime=$(uptime | awk '{print $3,$4}' | cut -f1 -d,)echo -e "${cyan}System Uptime:${NC} :$uptime"#Fetching the load averageloadaverage=$(top -n 1 -b | grep "load average:" | awk '{print $10 $11 $12}')echo -e "${cyan}Load average:${NC}: $loadaverage"echo -e "${cyan}The top 10 services with high resource usage are listed below.${NC}"#Get top services with high resource utilizationps -eo pid,ppid,cmd,%mem,%cpu --sort=-%mem | head#sectioning...........#Fetching server space details!echo -e "${YELLOW}---------------------------------------------------------------------------------------------------------------${NC}"echo "Server space Details:"echo -e "${YELLOW}---------------------------------------------------------------------------------------------------------------${NC}"#View disk space detailsdf -hecho "----------------------------------------------------------------------------------------------------------------"

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我们可以将该脚本转换为全局命令，将文件移动到 sbin 目录，并赋予执行权限。

mv /root/dean.sh /usr/sbinchmod +x /usr/sbin/dean.sh

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添加至别名里

vim /root/.bashrcalias dean='sh /usr/sbin/dean.sh'

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生效

source .bashrc

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现在您可以在 shell 的任何位置调用该脚本。

dean

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执行效果

优势

• 只需一个命令就可以轻松访问完整的服务器信息，并且还可以在出现问题时安排警报通知。
• 编辑脚本并添加服务非常简单。
• 显示有关正在运行的进程、磁盘空间、宕机时间、内存详细信息、高进程列表等的详细信息。

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