HaProxy配置负载均衡

作者: 07b287742148 | 来源:发表于2019-03-05 09:23 被阅读0次

使用Haproxy
HaProxy配置负载均衡
Haproxy的ACL与负载均衡、tcp与http模式及相关健康
HAProxy安装配置详解
Haproxy 基础
MySQL-14mysql负载均衡
HAProxy
HAProxy
十八、01-运用haproxy实现nginx、mysql服务负载
常见的负载均衡技术

下载

yum install -y haproxy

配置

#---------------------------------------------------------------------
global
    log         127.0.0.1 local2

    chroot      /var/lib/haproxy
    pidfile     /var/run/haproxy.pid
    maxconn     4000
    user        haproxy
    group       haproxy
    daemon

    # turn on stats unix socket
    stats socket /var/lib/haproxy/stats

#---------------------------------------------------------------------
# common defaults that all the 'listen' and 'backend' sections will
# use if not designated in their block
#---------------------------------------------------------------------
defaults
    mode                    http
    log                      global
    option                  httplog
    option                  dontlognull
    #option http-server-close
    #option forwardfor       except 127.0.0.0/8
    option                  redispatch
    retries                 3
    timeout http-request    10s
    timeout queue           1m
    timeout connect         10s
    timeout client          1m
    timeout server          1m
    timeout http-keep-alive 10s
    timeout check           10s
    maxconn                 3000

# haproxy管理页面端口
listen stats
    bind 0.0.0.0:1080
    mode http
    option httplog
    maxconn 5000
    stats refresh 30s
    stats  uri /stats

# 代理tomcat访问的端口
listen web
    bind 0.0.0.0:80 # 对外访问端口
    mode http
    option httplog
    balance roundrobin
    server bigdata2-test bigdata2-test:8080 check # 还可以定制其他参数
    server bigdata3-test bigdata3-test:8080 check
    server bigdata4-test bigdata4-test:8080 check

启动tomcat，

注意tomcat页面访问要关掉linux防火墙

systemctl stop firewalld

启动haproxy，查看ip:1080/stats

service haproxy start

service haproxy status

# 常见bug：“cannot bind socket”
    # 执行命令
    setsebool -P haproxy_connect_any=1

    # 修改配置
    vi   /etc/sysctl.conf
    添加：net.ipv4.ip_nonlocal_bind=1
    sysctl -p

再重新启动haproxy

此时访问ip:80端口会自动分配到配置的三台服务器上，

一个小py脚本监听haproxy是否GG

主要是监听haproxy的ui界面是否还可以访问

// pip安装
wget https://bootstrap.pypa.io/get-pip.py
python get-pip.py

// 安装python模块 
pip install requests

// 监听脚本
#-*- coding:utf-8 -*-
import requests
import time
import json

url = 'http://bigdata2:1080/stats'

# 发送钉钉提醒
def dingDingMsg(text):
    headers = {'Content-Type': 'application/json;charset=utf-8'}
    api_url = 'https://oapi.dingtalk.com/robot/send?access_token=5e07a7ce2a75e7536e32a5782d0e040a85bb407c6946ed67d93e0e5f24012911'
    json_text = {
        "msgtype": "text",
        "isAtAll": True,
        "text": {
            "content": text
        }
    }
    post_return = requests.post(api_url,json.dumps(json_text),headers=headers)
    print post_return.content

while True:
    cnt = 0
    try:
        response = requests.get(url)
        time.sleep(30)
    except RuntimeError,e:
        dingDingMsg('haproxy异常')
        dingDingMsg('haproxy已重启')
        cnt += 1
        if cnt < 5:
            continue
        else:
            e = raw_input('pauseing.........continue ?! (press enter or ctrl c)')
    except Exception,e:
        dingDingMsg('haproxy异常')
        dingDingMsg('haproxy已重启')
        cnt += 1
        if cnt < 5:
            continue
        else:
            e = raw_input('pauseing.........continue ?! (press enter or ctrl c)')
    except KeyboardInterrupt:
        exit(0)
    except :
        dingDingMsg('haproxy异常')
        dingDingMsg('haproxy已重启')
        cnt += 1
        if cnt < 5:
            continue
        else:
            e = raw_input('pauseing.........continue ?! (press enter or ctrl c)')



// python发布命令
nohup python /etc/haproxy/listen_haproxy.py > listen.log 2>&1 &

// shell定时任务

#删除脚本
#!/bin/bash
cat /dev/null > /etc/haproxy/listen.log

#脚本授权
chmod 777 clean_log.sh


#进入定时任务
crontab -e

0 */3 * * * /etc/haproxy/clean_log.sh

#查看任务
crontab -l

#定时任务日志

tail -500f /var/log/cron