haproxy调度web案例

一、实验架构图

haproxy通过ACL规则来实现智能负载均衡
当输入bbs.linux.com时，haproxy将请求转发到后端bbs服务器
当输入blog.linux.com时，haproxy将请求转发到后端blog服务器
前端两台haproxy服务器通过部署keepalived来实现haproxy高可用

二、准备工作

系统版本：centos7
haproxy服务器
haproxy01 192.168.122.100
haproxy02 192.168.122.200
bbs服务器
web01 192.168.122.101
web02 192.168.166.102
blog服务器
web03 192.168.122.103
web04 192.168.122.104
关闭firewalld和SElinux,各主机均为固定ip

三、部署bbs服务器和blog服务器的测试页面

安装httpd并启动

[root@web01 ~]# yum install -y httpd [root@web01 ~]# echo "web01.bbs.com" >/var/www/html/index.html [root@web01 ~]# systemctl start httpd [root@web01 ~]# systemctl enable httpd

web01与web02测试页面分别为web01.bbs.com和web02.bbs.com
web03与web04测试页面分别为web03.blog.com和web04.blog.com

四、在haproxy01主机上安装haproxy,并进行配置

[root@haproxy01 ~]# yum install -y haproxy

配置文件所在位置

[root@haproxy01 ~]# rpm -qc haproxy /etc/haproxy/haproxy.cfg /etc/logrotate.d/haproxy

打开并编辑配置文件

[root@haproxy01 ~]# vim /etc/haproxy/haproxy.cfg globalmaxconn 2000nbproc 1user nobodygroup nobodylog 127.0.0.1 local0 infodaemonpidfile /var/run/haproxy.piddefaultsmode httpretries 3timeout connect 5stimeout client 10stimeout server 30stimeout check 2slisten admin_statusbind 0.0.0.0:9088mode httplog 127.0.0.1 local0 errstats refresh 30sstats uri /haproxy-statusstats realm welcome loginstats auth admin:adminstats hide-versionstats admin if TRUEfrontend test-proxybind *:80mode httplog globaloption httplogoption forwardforacl host_bbs hdr_dom(host) -i bbs.linux.comacl host_blog hdr_beg(host) -i blog.use_backend server_bbs if host_bbsuse_backend server_blog if host_blogbackend server_bbsmode httpoption redispatchcookie SERVERIDoption abortonclosebalance roundrobinserver bbs01 192.168.122.101:80 cookie bbs01 weight 3 check inter 2000 rise 1 fall 2server bbs02 192.168.122.102:80 cookie bbs02 weight 3 check inter 2000 rise 1 fall 2backend server_blogmode httpoption redispatchcookie SERVERIDoption abortonclosebalance roundrobinserver blog01 192.168.122.103:80 cookie blog01 weight 3 check inter 2000 rise 1 fall 2server blog02 192.168.122.104:80 cookie blog02 weight 3 check inter 2000 rise 1 fall 2

启动haproxy服务

[root@haproxy01 ~]# systemctl start haproxy [root@haproxy01 ~]# ss -antp |grep haproxy LISTEN 0 128 *:9088 *:* users:(("haproxy",8742,4),("haproxy",8741,4)) LISTEN 0 128 *:80 *:* users:(("haproxy",8742,6),("haproxy",8741,6))

五、阶段测试
打开浏览器，通过输入bbs.linux.com,可看到web01和web02的负载均衡效果。通过输入blog.linux.com,可看到web03和web04的负载均衡效果。

六、测试访问haproxy的监控页面

七、安装配置haproxy02
软件安装方法和配置文件与haproxy01一致

[root@haproxy02 ~]# yum install -y haproxy [root@haproxy02 ~]# scp 192.168.122.100:/etc/haproxy/haproxy.cfg /etc/haproxy/ [root@haproxy02 ~]# systemctl start haproxy [root@haproxy02 ~]# systemctl enable haproxy

八、配置keepalived实现haproxy高可用

分别在两台haproxy主机上安装keepalived

[root@haproxy01 ~]# yum install -y keepalivedhaproxy01主机keepalived配置文件如下 [root@haproxy01 ~]# vim /etc/keepalived/keepalived.conf ! Configuration File for keepalivedglobal_defs {router_id haproxy01 }vrrp_instance VI_1 {state MASTERinterface eth0virtual_router_id 80priority 100advert_int 1authentication {auth_type PASSauth_pass redhat}virtual_ipaddress {192.168.122.111} } [root@haproxy01 ~]# scp /etc/keepalived/keepalived.conf 192.168.122.200:/etc/keepalived/haproxy02主机keepalived配置文件如下[root@haproxy01 ~]# scp /etc/keepalived/keepalived.conf 192.168.122.200:/etc/keepalived/ ! Configuration File for keepalivedglobal_defs {router_id haproxy02 }vrrp_instance VI_1 {state BACKUPinterface eth0virtual_router_id 80priority 50advert_int 1authentication {auth_type PASSauth_pass redhat}virtual_ipaddress {192.168.122.111} }

分别启动keepalived服务

[root@haproxy01 ~]# systemctl start keepalived [root@haproxy01 ~]# systemctl enable keepalived ln -s '/usr/lib/systemd/system/keepalived.service' '/etc/systemd/system/multi-user.target.wants/keepalived.service' [root@haproxy01 ~]# systemctl status keepalived keepalived.service - LVS and VRRP High Availability MonitorLoaded: loaded (/usr/lib/systemd/system/keepalived.service; enabled)Active: active (running) since 二 2018-06-05 19:56:24 CST; 33s agoMain PID: 8821 (keepalived)CGroup: /system.slice/keepalived.service├─8821 /usr/sbin/keepalived -D├─8822 /usr/sbin/keepalived -D└─8823 /usr/sbin/keepalived -D [root@haproxy01 ~]# ip addr show eth0 2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000link/ether 52:54:00:4f:62:e6 brd ff:ff:ff:ff:ff:ffinet 192.168.122.100/24 brd 192.168.122.255 scope global eth0valid_lft forever preferred_lft foreverinet 192.168.122.111/32 scope global eth0valid_lft forever preferred_lft foreverinet6 fe80::5054:ff:fe4f:62e6/64 scope link valid_lft forever preferred_lft forever [root@haproxy02 ~]# systemctl start keepalived [root@haproxy02 ~]# systemctl enable keepalived ln -s '/usr/lib/systemd/system/keepalived.service' '/etc/systemd/system/multi-user.target.wants/keepalived.service' [root@haproxy02 ~]# systemctl status keepalived keepalived.service - LVS and VRRP High Availability MonitorLoaded: loaded (/usr/lib/systemd/system/keepalived.service; enabled)Active: active (running) since 二 2018-06-05 19:57:24 CST; 12s agoMain PID: 8738 (keepalived)CGroup: /system.slice/keepalived.service├─8738 /usr/sbin/keepalived -D├─8739 /usr/sbin/keepalived -D└─8740 /usr/sbin/keepalived -D

配置haproxy的记录日志

[root@haproxy02 ~]# vim /etc/sysconfig/rsyslog # Options for rsyslogd # Syslogd options are deprecated since rsyslog v3. # If you want to use them, switch to compatibility mode 2 by "-c 2" # See rsyslogd(8) for more details SYSLOGD_OPTIONS="-c 2 -r" [root@haproxy02 ~]# vim /etc/rsyslog.conf $ModLoad imudp $UDPServerRun 514local0.* /var/log/haproxy.log [root@haproxy02 ~]# systemctl restart rsyslog.service haproxy.service [root@haproxy02 ~]# ls /var/log/ anaconda boot.log cron dmesg.old lastlog messages rhsm spooler tuned yum.log audit btmp dmesg haproxy.log maillog ppp secure tallylog wtmp [root@haproxy02 ~]# tail -f /var/log/haproxy.log Jun 5 20:13:58 localhost haproxy[8805]: Proxy test-proxy started.

转载于:https://blog.51cto.com/12244079/2125240

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