nginx status配置及参数配置小结

   #NGINX 状态监控 ,需要确认是否安装监控模块 http_stub_status_module，如果已经安装该模块，可以为 NGINX 启用状态监控：
   server {
	    listen 91;
	    
	    location /status {            
	      stub_status on;            
	      access_log off;            
	    }
    }    

import urllib.request
import re
import time

url = 'http://localhost/nginx_status'

while True:
    response = urllib.request.urlopen(url)
    html = response.read().decode('utf-8')
    status = re.findall(r'Requests\s+(\d+)', html)[0]    # requests信息
    traffic = re.findall(r'(\d+)\skB', html)[0]    # bytes信息
    print('Requests:{} | Traffic:{}kB'.format(status, traffic))
    time.sleep(5)    # 每5秒更新一次

#!/bin/bash

# 配置备用服务器地址
backup_server=192.168.1.2

while true
do
    # 获取Active连接数
    active_conn=$(curl -s http://localhost/nginx_status | grep 'Active' | awk '{print $3}')

    # 当Active连接数大于100时，自动将流量切到备用服务器
    if [ $active_conn -gt 100 ]
    then
        sed -i 's/server\ 192\.168\.1\.1/server\ 192\.168\.1\.2/g' /etc/nginx/nginx.conf
        nginx -s reload
    fi

    # 当Active连接数小于50时，自动将流量切回主服务器
    if [ $active_conn -lt 50 ]
    then
        sed -i 's/server\ 192\.168\.1\.2/server\ 192\.168\.1\.1/g' /etc/nginx/nginx.conf
        nginx -s reload
    fi

    sleep 10    # 每10秒检查一次
done

import urllib.request
import re
import time
import subprocess

url = 'http://localhost/nginx_status'

while True:
    response = urllib.request.urlopen(url)
    html = response.read().decode('utf-8')
    handled = re.findall(r'Handled\s+(\d+)', html)[0]
    status = subprocess.Popen('service nginx status', shell=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
    output = status.communicate()[0].decode('utf-8')

    if 'active (running)' not in output or int(handled) == 0:
        subprocess.Popen('service nginx restart', shell=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
        time.sleep(30)    # 等待30秒后再次检测

    time.sleep(5)    # 每5秒检查一次