Nginx-nginx状态监控

• 环境说明：

//安装依赖环境
[root@agent ~]# yum -y install pcre-devel openssl openssl-devel gd-devel gcc gcc-c++ make 
[root@agent ~]# yum -y groups mark install 'Development Tools'

//创建系统用户nginx
[root@agent ~]#  useradd -r -M -s /sbin/nologin nginx

//创建日志存放目录
[root@agent ~]#  mkdir -p /var/log/nginx
[root@agent ~]#  chown -R nginx.nginx /var/log/nginx

//下载nginx
[root@agent src]# wget http://nginx.org/download/nginx-1.20.1.tar.gz

//编译安装
[root@agent nginx-1.20.1]# ./configure 
--prefix=/usr/local/nginx 
--user=nginx 
--group=nginx 
--with-debug 
--with-http_ssl_module 
--with-http_realip_module 
--with-http_image_filter_module 
--with-http_gunzip_module 
--with-http_gzip_static_module 
--with-http_stub_status_module 
--http-log-path=/var/log/nginx/access.log 
--error-log-path=/var/log/nginx/error.log

[root@agent nginx-1.20.1]# make -j $(grep 'processor' /proc/cpuinfo | wc -l) && make install

//配置环境变量
[root@agent ~]# echo 'export PATH=/usr/local/nginx/sbin:$PATH' > /etc/profile.d/nginx.sh
[root@agent ~]#  source /etc/profile.d/nginx.sh
[root@agent ~]# which nginx
/usr/local/nginx/sbin/nginx

//设置开机自启
[root@agent ~]# vi /usr/lib/systemd/system/nginx.service

[Unit]
Description=nginx start
After=network.target
  
[Service]
Type=forking
ExecStart=/usr/local/nginx/sbin/nginx
ExecStop=/usr/local/nginx/sbin/nginx -s stop
ExecReload=/bin/kill -HUP  

[Install]
WantedBy=multi-user.target
[root@agent ~]# systemctl daemon-reload

//启动并开机自启nginx
[root@agent ~]# systemctl enable --now nginx
[root@agent ~]# ss -antl 
State  Recv-Q Send-Q Local Address:Port Peer Address:PortProcess 
LISTEN 0      128          0.0.0.0:80        0.0.0.0:*           
LISTEN 0      128          0.0.0.0:22        0.0.0.0:*           
LISTEN 0      128             [::]:22           [::]:*   

//开启状态页面
[root@agent ~]# vim /usr/local/nginx/conf/nginx.conf
......
        location /status {
            stub_status;
        }
......
[root@agent ~]# nginx -s reload

• 编写脚本

//编写脚本
[root@agent scripts]# pwd
/scripts

//监控waiting值
[root@agent scripts]# vim check_wait.sh
#!/bin/bash 

waiting=$(curl -s http://192.168.218.133/status|awk 'NR==4{print $6}')

if [ $waiting -gt 40 ];then
    echo "1"
else
    echo "0"
fi

//监控reading值
[root@agent scripts]# vim check_read.sh
#!/bin/bash

reading=$(curl  -s http://192.168.218.133/status | awk 'NR==4{print $2}')

if [ $reading -gt 80 ];then
    echo "1"    
else
    echo "0"   
fi  

//监控wrinting值
[root@agent scripts]# vim check_write.sh
#!/bin/bash 

writing=$(curl  -s http://192.168.218.133/status | awk 'NR==4{print $4}')

if [ $writing -gt 40 ];then
    echo "1"
else
    echo "0"
fi     
[root@agent scripts]# chmod +x check_wait.sh check_read.sh check_write.sh 

• 修改zabbix_agentd.conf文件

[root@agent etc]# pwd
/usr/local/etc
[root@agent etc]# vim zabbix_agentd.conf
......
UnsafeUserParameters=1
......
//在结尾添加以下三行
UserParameter=check_read,/scripts/check_read.sh
UserParameter=check_write,/scripts/check_write.sh
UserParameter=check_wait,/scripts/check_wait.sh

• 重启服务

[root@agent ~]# pkill zabbix
[root@agent ~]# zabbix_agentd 

• 测试key(服务端)

[root@server ~]# zabbix_get -s 192.168.218.133 -k check_read
0
[root@server ~]# zabbix_get -s 192.168.218.133 -k check_write
0
[root@server ~]# zabbix_get -s 192.168.218.133 -k check_wait
0

• 添加监控项
  Reading监控项
  
  Writing监控项
  
  Waiting监控项
  
• 添加触发器
  添加Reading触发器
  
  添加Writing触发器
  
  添加Waiting触发器
  
• 查看实时是否正常
  
  
  
• 测试

//修改脚本check_wait.sh中的比较值，主动触发报警
[root@agent scripts]# vim check_wait.sh 
#!/bin/bash 
  
waiting=$(curl -s http://192.168.218.133/status|awk 'NR==4{print $6}')

if [ $waiting -gt 0 ];then      //改为0，主动触发
    echo "1"
else
    echo "0"
fi

//修改完成以后无需重启服务就会立即报警

• 合并脚本
  以上自定义监控nginx状态时，写了三个脚本，虽然功能可以实现，但是编辑配置文件时需要写三条UserParameter，如果数量太大就相对来讲比较麻烦，以下我们把三个脚本合并到一个脚本中

[root@agent ~]# cat /scripts/check_nginx_status.sh 
#!/bin/bash 

case $1 in
	'Reading')
	    if [ `curl  -s http://192.168.218.133/status | awk 'NR==4{print $2}'` -gt 80 ];then
	        echo "1"
	    else 
		echo "0"
	    fi
	  ;;
	'Writing')
            if [ `curl  -s http://192.168.218.133/status | awk 'NR==4{print $4}'` -gt 40 ];then
	        echo "1"
	    else
		echo "0"
	    fi
	  ;;
	'Waiting')
	    if [ `curl -s http://192.168.218.133/status|awk 'NR==4{print $6}'` -gt 40 ];then
                echo "1"
	    else
		echo "0"
	    fi
		;;	
esac

• 修改zabbix_agentd.conf文件

[root@agent etc]# pwd
/usr/local/etc
[root@agent etc]# vim zabbix_agentd.conf
......
UnsafeUserParameters=1
......
//在结尾添加以下内容
UserParameter=check_nginx_status[*],/scripts/check_nginx_status.sh $1