pacemaker+Haproxy实现集群负载均衡

其他 2018-08-08 06:57:26 阅读次数: 0 
server2,server3:集群节点

server5,server6:后端服务器

一、配置Haproxy

 HAProxy 是一款提供高可用性、负载均衡以及基于TCP（第四层）和HTTP（第七层）应用的代理软件。也是是一种高效、可靠、免费的高可用及负载均衡解决方案，非常适合于高负载站点的七层数据请求。客户端通过HAProxy代理服务器获得站点页面，而代理服务器收到客户请求后根据负载均衡的规则将请求数据转发给后端真实服务器。
同一客户端访问服务器，HAProxy保持回话的三种方案：
1 HAProxy将客户端ip进行Hash计算并保存，由此确保相同IP访问时被转发到同一真实服务器上。
2 HAProxy依靠真实服务器发送给客户端的cookie信息进行回话保持。
3 HAProxy保存真实服务器的session及服务器标识，实现会话保持功能。

在server2：

[root@serve2 yum.repos.d]# yum install haproxy -y  安装haproxy
Loaded plugins: product-id, subscription-manager
This system is not registered to Red Hat Subscription Management. You can use subscription-manager to register.
Setting up Install Process
Package haproxy-1.4.24-2.el6.x86_64 already installed and latest version
Nothing to do
[root@serve2 yum.repos.d]# vim /etc/haproxy/haproxy.cfg  编辑主配置文件
[root@serve2 yum.repos.d]# cat /etc/haproxy/haproxy.cfg 
#---------------------------------------------------------------------
# Example configuration for a possible web application.  See the
# full configuration options online.
#
#   http://haproxy.1wt.eu/download/1.4/doc/configuration.txt
#
#---------------------------------------------------------------------

#---------------------------------------------------------------------
# Global settings
#---------------------------------------------------------------------
global
    # to have these messages end up in /var/log/haproxy.log you will
    # need to:
    #
    # 1) configure syslog to accept network log events.  This is done
    #    by adding the '-r' option to the SYSLOGD_OPTIONS in
    #    /etc/sysconfig/syslog
    #
    # 2) configure local2 events to go to the /var/log/haproxy.log
    #   file. A line like the following can be added to
    #   /etc/sysconfig/syslog
    #
    #    local2.*                       /var/log/haproxy.log
    #
    log         127.0.0.1 local2

    chroot      /var/lib/haproxy
    pidfile     /var/run/haproxy.pid
    maxconn     65535
    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
    stats uri               /admin/stats  健康检查
    monitor-uri             /monitoruri   监控管理
#---------------------------------------------------------------------
# main frontend which proxys to the backends
#---------------------------------------------------------------------
frontend  main *:5000
#    acl url_static       path_beg       -i /static /images /javascript /stylesheets
#    acl url_static       path_end       -i .jpg .gif .png .css .js

#    use_backend static          if url_static
    bind        172.25.254.100:80    添加虚拟IP
    default_backend           static

#---------------------------------------------------------------------
# static backend for serving up images, stylesheets and such
#---------------------------------------------------------------------
backend static
    balance     roundrobin
    server      static  172.25.254.6:80 check   添加后端IP
    server      static  172.25.254.7:80 check

#---------------------------------------------------------------------
# round robin balancing between the various backends
#---------------------------------------------------------------------
backend app
    balance     roundrobin
    server  app1 127.0.0.1:5001 check
    server  app2 127.0.0.1:5002 check
    server  app3 127.0.0.1:5003 check
    server  app4 127.0.0.1:5004 check

这里写图片描述

[root@serve2 yum.repos.d]# ip addr add 172.25.254.100/24 dev eth0  添加虚拟IP
[root@serve2 yum.repos.d]# vim /etc/security/limits.conf 
[root@serve2 yum.repos.d]# cat /etc/security/limits.conf| tail -n 1
haproxy     -   nofile  65535 
[root@serve2 yum.repos.d]# /etc/init.d/haproxy start  打开服务
Starting haproxy:                                          [  OK  ]
[root@serve2 yum.repos.d]# ip addr  查看IP
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN 
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
    link/ether 52:54:00:ee:d7:80 brd ff:ff:ff:ff:ff:ff
    inet 172.25.254.2/24 brd 172.25.254.255 scope global eth0
    inet 172.25.254.100/24 scope global secondary eth0
    inet6 fe80::5054:ff:feee:d780/64 scope link 
       valid_lft forever preferred_lft forever

这里写图片描述

server1上Haproxy实现轮询： 测试

配置后端服务器server5：

[root@server5 ~]# yum install httpd -y  安装阿帕其
Loaded plugins: product-id, subscription-manager
This system is not registered to Red Hat Subscription Management. You can use subscription-manager to register.
Setting up Install Process
Package httpd-2.2.15-29.el6_4.x86_64 already installed and latest version
Nothing to do
[root@server5 ~]# cd /var/www/html/  编写访问目录
[root@server5 html]# ls
[root@server5 html]# vim index.html
[root@server5 html]# cat index.html
server5
[root@server5 html]# /etc/init.d/httpd start  打开阿帕其
Starting httpd: httpd: Could not reliably determine the server's fully qualified domain name, using 172.25.254.5 for ServerName
                                                           [  OK  ]
[root@server5 html]# /etc/init.d/httpd restart  重启阿帕其
Stopping httpd:                                            [  OK  ]
Starting httpd: httpd: Could not reliably determine the server's fully qualified domain name, using 172.25.254.5 for ServerName
                                                           [  OK  ]

这里写图片描述

配置后端服务器server6：

[root@server6 ~]# yum install httpd -y  安装阿帕其
Loaded plugins: product-id, subscription-manager
This system is not registered to Red Hat Subscription Management. You can use subscription-manager to register.
rhel-source                                              | 3.9 kB     00:00     
Setting up Install Process
Package httpd-2.2.15-29.el6_4.x86_64 already installed and latest version
Nothing to do
[root@server6 ~]# cd /var/www/html/   编写访问目录
[root@server6 html]# ls
[root@server6 html]# vim index.html
[root@server6 html]# cat index.html 
server6
[root@server6 html]# /etc/init.d/httpd start 打开阿帕其
Starting httpd: httpd: Could not reliably determine the server's fully qualified domain name, using 172.25.254.6 for ServerName
                                                           [  OK  ]
[root@server6 html]# /etc/init.d/httpd restart重启阿帕其
Stopping httpd:                                            [  OK  ]
Starting httpd: httpd: Could not reliably determine the server's fully qualified domain name, using 172.25.254.6 for ServerName
                                                           [  OK  ]

这里写图片描述

在真机写入解析在浏览器测试可以正常轮询：

这里写图片描述
这里写图片描述

在浏览器测试健康检查：

这里写图片描述

在浏览器测试监控界面：

这里写图片描述

在server3和server2作同样的配置防止一个节点坏掉系统崩溃：

[root@serve3 ~]# yum install haproxy -y  安装haproxy服务
[root@serve3 ~]# scp server2:/etc/haproxy/haproxy.cfg /etc/haproxy/
root@server2's password: 
haproxy.cfg                                   100% 3301     3.2KB/s   00:00    
[root@serve3 ~]# ip addr add 172.25.254.100/24 dev eth0  添加虚拟IP
[root@serve3 ~]# ip addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN 
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
    link/ether 52:54:00:42:fc:3a brd ff:ff:ff:ff:ff:ff
    inet 172.25.254.3/24 brd 172.25.254.255 scope global eth0
    inet 172.25.254.100/24 scope global secondary eth0
    inet6 fe80::5054:ff:fe42:fc3a/64 scope link 
       valid_lft forever preferred_lft forever
[root@serve3 ~]#

二、配置pacemaker：

     Pacemaker是一个集群资源管理器。它利用集群基础构件
（OpenAIS 、heartbeat或corosync）提供的消息和成
员管理能力来探测并从节点或资源级别的故障中恢复，以实现
群集服务（亦称资源）的最大可用性。
    Corosync是集群管理套件的一部分，它在传递信息的时候可以
    通过一个简单的配置文件来定义信息传递的方式和协议等。
传递心跳信息和集群事务信息，pacemaker工作在资源分配层，提供资
源管理器的功能，并以crmsh这个资源配置的命令接口来配置资源

在server2:

[root@serve2 ~]# yum install pacemaker corosync -y  安装pacemaker
[root@serve2 ~]# cp /etc/corosync/corosync.conf.example /etc/corosync/corosync.conf
[root@serve2 ~]# rpm -ivh crmsh-1.2.6-0.rc2.2.1.x86_64.rpm --nodeps  安装crm
warning: crmsh-1.2.6-0.rc2.2.1.x86_64.rpm: Header V3 DSA/SHA1 Signature, key ID 7b709911: NOKEY
Preparing...                ########################################### [100%]
   1:crmsh                  ########################################### [100%]

这里写图片描述

[root@serve2 ~]# vim /etc/corosync/corosync.conf  修改配置文件

这里写图片描述
这里写图片描述

[root@serve2 ~]# scp crmsh-1.2.6-0.rc2.2.1.x86_64.rpm server3:/root  将配置文件传到server3
root@server3's password: 
crmsh-1.2.6-0.rc2.2.1.x86_64.rpm              100%  483KB 483.4KB/s   00:00    
[root@serve2 ~]# /etc/init.d/pacemaker start  开启服务
[root@serve2 ~]# scp /etc/corosync/corosync.conf server3:/etc/corosync/
root@server3's password: 
corosync.conf                                 100%  642     0.6KB/s   00:00    
[root@serve2 ~]# /etc/init.d/corosync start  开启服务
Starting Corosync Cluster Engine (corosync):               [  OK  ]
[root@serve2 ~]# crm    只有server2状态
crm(live)# status
Last updated: Fri Aug  3 20:47:36 2018
Last change: Fri Aug  3 20:45:38 2018 via crmd on serve2
Stack: classic openais (with plugin)
Current DC: serve2 - partition WITHOUT quorum
Version: 1.1.10-14.el6-368c726
1 Nodes configured, 2 expected votes
0 Resources configured


Online: [ serve2 ]
crm(live)# quit
bye

这里写图片描述

[root@serve2 ~]# crm status
Last updated: Fri Aug  3 21:26:49 2018
Last change: Fri Aug  3 21:10:22 2018 via crmd on serve2
Stack: classic openais (with plugin)
Current DC: serve2 - partition with quorum
Version: 1.1.10-14.el6-368c726
2 Nodes configured, 2 expected votes
0 Resources configured


Online: [ serve2 serve3 ]
[root@serve2 ~]# crm node standby  将server2节点关闭

这里写图片描述

在server3：

[root@serve3 ~]# yum install pacemaker corosync -y 安装pacemaker安装包
[root@serve3 ~]# rpm -ivh crmsh-1.2.6-0.rc2.2.1.x86_64.rpm --nodeps
error: open of crmsh-1.2.6-0.rc2.2.1.x86_64.rpm failed: No such file or directory
[root@serve3 ~]# rpm -ivh crmsh-1.2.6-0.rc2.2.1.x86_64.rpm --nodeps
warning: crmsh-1.2.6-0.rc2.2.1.x86_64.rpm: Header V3 DSA/SHA1 Signature, key ID 7b709911: NOKEY
Preparing...                ########################################### [100%]
   1:crmsh                  ########################################### [100%]
[root@serve3 ~]# /etc/init.d/corosync start  打开服务
Starting Corosync Cluster Engine (corosync):               [  OK  ]
[root@serve3 ~]# /etc/init.d/pacemaker start  打开服务

这里写图片描述

[root@serve3 ~]# crm status  查看状态server2和server3工作
Last updated: Fri Aug  3 21:25:33 2018
Last change: Fri Aug  3 21:10:22 2018 via crmd on serve2
Stack: classic openais (with plugin)
Current DC: serve2 - partition with quorum
Version: 1.1.10-14.el6-368c726
2 Nodes configured, 2 expected votes
0 Resources configured


Online: [ serve2 serve3 ]
[root@serve3 ~]# crm status  server2关闭之后
Last updated: Fri Aug  3 21:27:18 2018
Last change: Fri Aug  3 21:27:12 2018 via crm_attribute on serve2
Stack: classic openais (with plugin)
Current DC: serve2 - partition with quorum
Version: 1.1.10-14.el6-368c726
2 Nodes configured, 2 expected votes
0 Resources configured


Node serve2: standby
Online: [ serve3 ]
[root@serve3 ~]# crm node standby   将server3关闭没有节点工作
[root@serve3 ~]# crm status
Last updated: Fri Aug  3 21:29:11 2018
Last change: Fri Aug  3 21:29:07 2018 via crm_attribute on serve2
Stack: classic openais (with plugin)
Current DC: serve2 - partition with quorum
Version: 1.1.10-14.el6-368c726
2 Nodes configured, 2 expected votes
0 Resources configured


Node serve2: standby
Node serve3: standby

这里写图片描述

猜你喜欢

转载自blog.csdn.net/aaaaaab_/article/details/81393876
今日推荐
LFOSSA 源来如此公开课 | 掌握云原生未来：CNCF 认证全面攻略与备考秘籍
国产云输入法——仅华为无云端数据上传安全问题
开源日报 | 工业开源项目OGG 1.0；姐姐，你要和我一起配置火狐吗；苹果AI遥遥落后？Fedora 40
开放签电子签章：停止新增，优化体验，前进更进（五一假期前工作）
开源日报 | 中学生开源前端动画引擎；全球首个Llama3 8B中文版开源模型；联想电脑恐出局；Linus讽刺AI炒作
“百模大战”必有一战 | 2024中国“百模大战”竞争格局分析
周排行
Family Tree 题解
BZOJ 1093 最大半连通子图 SCC + DP
幂等处理
Spring----学习（2）----XML 配置Bean 自动装配
SQL Server 远程更新目标表数据
HIbernate3.6 环境搭建
特殊符号正则表达式
【Linux】第一章 进程的理解
843. n-皇后问题（dfs+输出各种情况）
空间数据库2
每日归档
更多
2024-04-26(39)
2024-04-25(22)
2024-04-24(36)
2024-04-23(26)
2024-04-22(39)
2024-04-21(0)
2024-04-20(6)
2024-04-19(5)
2024-04-18(0)
2024-04-17(5)

代码天地 © 2018 codetd.com

境外服务器   最新电视剧2022