使用 bash 脚本创建 Linux 健康检查工具

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。

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