實戰：運維必備Linux巡檢腳本

巡檢意義

及時發現隱患：對服務器進行巡檢能夠及時發現服務器的隱患，以便於改善和優化服務器的性能。

觀察運行狀況：觀察服務器的運行狀況，及時對設備進行調整，保證服務器的24小時不間斷的工作。

採集網內服務器信息：通過巡檢，可以採集網內服務器信息，瞭解服務器的配置和運行情況。

提高效率：使用巡檢腳本可以有效地減少人力、物力和時間成本，提高巡檢效率。

保證全面性和準確性：人工巡檢很容易出現疏漏和錯誤，而巡檢腳本可以自動化處理巡檢任務，避免疏漏和錯誤，保證巡檢的全面性和準確性。

確保服務器安全性：巡檢腳本可以掃描服務器的安全漏洞，及時發現風險，減少服務器被攻擊的可能性，確保服務器安全性。

巡檢腳本

vim /root/dean.sh

#! /bin/bash# Author：Dean# Web：https://www.bunian.cn# 微信公衆號：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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我們可以將該腳本轉換爲全局命令，將文件移動到 sbin 目錄，並賦予執行權限。

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

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添加至別名裏

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

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生效

source .bashrc

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現在您可以在 shell 的任何位置調用該腳本。

dean

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執行效果

優勢

• 只需一個命令就可以輕鬆訪問完整的服務器信息，並且還可以在出現問題時安排警報通知。
• 編輯腳本並添加服務非常簡單。
• 顯示有關正在運行的進程、磁盤空間、宕機時間、內存詳細信息、高進程列表等的詳細信息。

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