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Linux 下简便的方法来查找服务状态、健康检查和服务器资源利用率等等。

注：适用于单体架构。

通过使用这种方法，我们可以使用单个工具检查服务器的健康状态、服务状态和服务器详细信息。只需更改脚本以添加其他服务或使用相同的模板即可。此外，通过设置定时任务，我们可以在出现问题时收到通知。

让我们开始吧！

编写脚本

$ vim linuxmi

#! /bin/bash #color notes NC='\033[0m' GREEN='\033[0;32m' RED='\033[0;31m' YELLOW='\033[0;33m' cyan='\033[0;36m' yellow='\033[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}---------------------------------------------------------------------------------------------------------------${NC}" sleep 1 #checking tomcat status echo -e "${yellow}1) Tomcat${NC}" #grepping tomcat status from ps aux pp=`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}" fi echo "" #function to check apache is running or not! function apache(){ echo -e "${yellow}2) Apache-httpd${NC}" #grepping apache status from ps aux httpd=`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 not function elastic(){ echo -e "${yellow}3) Elasticsearch${NC}" #grepping elasticsearch status from ps aux elastic=`ps aux | grep elasticsearch` if [[ $elastic =~ "elastic+" ]];then echo -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 aux mysql=`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 aux docker=`systemctl status docker | grep dead` if [[ $docker =~ "dead" ]];then echo -e " Status: ${GREEN}UP${NC}" else echo -e " Status: ${RED}DOWN${NC}" fi } #calling functions apache echo "" elastic echo "" mysql echo "" docker echo "" #Sectioning............ #Fetching mem and cpu informations echo -e "${YELLOW}---------------------------------------------------------------------------------------------------------------${NC}" echo "Memory Details:" echo -e "${YELLOW}---------------------------------------------------------------------------------------------------------------${NC}" sleep 1 #view mem info free -h #get uptime details uptime=$(uptime | awk '{print $3,$4}' | cut -f1 -d,) echo -e "${cyan}System Uptime:${NC} :$uptime" #Fetching the load average loadaverage=$(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.${NC}" #Get top services with high resource utilization ps -eo pid,ppid,cmd,%mem,%cpu --sort=-%mem | head #sectioning........... #Fetching server space details! echo -e "${YELLOW}---------------------------------------------------------------------------------------------------------------${NC}" echo "Server space Details:" echo -e "${YELLOW}---------------------------------------------------------------------------------------------------------------${NC}" #View disk space details df -h echo "----------------------------------------------------------------------------------------------------------------"

2、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。

linuxmi@linuxmi ~/www.linuxmi.com % sudo cp linuxmi /usr/sbin/ [sudo] linuxmi 的密码： linuxmi@linuxmi ~/www.linuxmi.com % sudo chmod +x /usr/sbin/linuxmi linuxmi@linuxmi ~/www.linuxmi.com

3、现在您可以在 shell 的任何位置调用该脚本。

linuxmi@linuxmi ~/www.linuxmi.com % linuxmi

示例输出如下：

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。