haproxy调度web案例
一、实验架构图http://i2.运维网.com/images/blog/201806/05/d5fadf94fd4c808a83d6c2ea28e66ee6.png
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
# yum install -y httpd
# echo "web01.bbs.com" >/var/www/html/index.html
# systemctl start httpd
# 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
# yum install -y haproxy
配置文件所在位置
# rpm -qc haproxy
/etc/haproxy/haproxy.cfg
/etc/logrotate.d/haproxy
打开并编辑配置文件
# vim /etc/haproxy/haproxy.cfg
global
maxconn 2000
nbproc 1
user nobody
group nobody
log 127.0.0.1 local0 info
daemon
pidfile /var/run/haproxy.pid
defaults
mode http
retries 3
timeout connect 5s
timeout client 10s
timeout server 30s
timeout check 2s
listen admin_status
bind 0.0.0.0:9088
mode http
log 127.0.0.1 local0 err
stats refresh 30s
stats uri /haproxy-status
stats realm welcome login
stats auth admin:admin
stats hide-version
stats admin if TRUE
frontend test-proxy
bind *:80
mode http
log global
option httplog
option forwardfor
acl host_bbs hdr_dom(host) -i bbs.linux.com
acl host_blog hdr_beg(host) -i blog.
use_backend server_bbs if host_bbs
use_backend server_blog if host_blog
backend server_bbs
mode http
option redispatch
cookie SERVERID
option abortonclose
balance roundrobin
server bbs01 192.168.122.101:80 cookie bbs01 weight 3 check inter 2000 rise 1 fall 2
server bbs02 192.168.122.102:80 cookie bbs02 weight 3 check inter 2000 rise 1 fall 2
backend server_blog
mode http
option redispatch
cookie SERVERID
option abortonclose
balance roundrobin
server blog01 192.168.122.103:80 cookie blog01 weight 3 check inter 2000 rise 1 fall 2
server blog02 192.168.122.104:80 cookie blog02 weight 3 check inter 2000 rise 1 fall 2
启动haproxy服务
# systemctl start haproxy
# 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。
http://i2.运维网.com/images/blog/201806/05/ef81d56621b67881731f92ed2204c2ef.png
http://i2.运维网.com/images/blog/201806/05/c3d860c06a5e47d464d6a8489e942a6d.png
http://i2.运维网.com/images/blog/201806/05/3453f6085e1198d3341e100dca6ddf3d.png
http://i2.运维网.com/images/blog/201806/05/9484e89bbc1d5544d9806ebbe017497f.png
六、测试访问haproxy的监控页面
http://i2.运维网.com/images/blog/201806/05/95cc0b8b26d57820e649e99bc52457d1.png
七、安装配置haproxy02
软件安装方法和配置文件与haproxy01一致
# yum install -y haproxy
# scp 192.168.122.100:/etc/haproxy/haproxy.cfg /etc/haproxy/
# systemctl start haproxy
# 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
# yum install -y keepalived
haproxy01主机keepalived配置文件如下
# vim /etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {
router_id haproxy01
}
vrrp_instance VI_1 {
state MASTER
interface eth0
virtual_router_id 80
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass redhat
}
virtual_ipaddress {
192.168.122.111
}
}
# scp /etc/keepalived/keepalived.conf 192.168.122.200:/etc/keepalived/
haproxy02主机keepalived配置文件如下
# scp /etc/keepalived/keepalived.conf 192.168.122.200:/etc/keepalived/
! Configuration File for keepalived
global_defs {
router_id haproxy02
}
vrrp_instance VI_1 {
state BACKUP
interface eth0
virtual_router_id 80
priority 50
advert_int 1
authentication {
auth_type PASS
auth_pass redhat
}
virtual_ipaddress {
192.168.122.111
}
}
分别启动keepalived服务
# systemctl start keepalived
# systemctl enable keepalived
ln -s '/usr/lib/systemd/system/keepalived.service' '/etc/systemd/system/multi-user.target.wants/keepalived.service'
# systemctl status keepalived
keepalived.service - LVS and VRRP High Availability Monitor
Loaded: loaded (/usr/lib/systemd/system/keepalived.service; enabled)
Active: active (running) since 二 2018-06-05 19:56:24 CST; 33s ago
Main PID: 8821 (keepalived)
CGroup: /system.slice/keepalived.service
├─8821 /usr/sbin/keepalived -D
├─8822 /usr/sbin/keepalived -D
└─8823 /usr/sbin/keepalived -D
# ip addr show eth0
2: eth0:mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 52:54:00:4f:62:e6 brd ff:ff:ff:ff:ff:ff
inet 192.168.122.100/24 brd 192.168.122.255 scope global eth0
valid_lft forever preferred_lft forever
inet 192.168.122.111/32 scope global eth0
valid_lft forever preferred_lft forever
inet6 fe80::5054:ff:fe4f:62e6/64 scope link
valid_lft forever preferred_lft forever
# systemctl start keepalived
# systemctl enable keepalived
ln -s '/usr/lib/systemd/system/keepalived.service' '/etc/systemd/system/multi-user.target.wants/keepalived.service'
# systemctl status keepalived
keepalived.service - LVS and VRRP High Availability Monitor
Loaded: loaded (/usr/lib/systemd/system/keepalived.service; enabled)
Active: active (running) since 二 2018-06-05 19:57:24 CST; 12s ago
Main 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
# 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"
# vim /etc/rsyslog.conf
$ModLoad imudp
$UDPServerRun 514
local0.* /var/log/haproxy.log
# systemctl restart rsyslog.service haproxy.service
# ls /var/log/
anacondaboot.logcron dmesg.old lastlogmessagesrhsm spooler tunedyum.log
audit btmp dmesghaproxy.logmaillogppp securetallylogwtmp
# tail -f /var/log/haproxy.log
Jun5 20:13:58 localhost haproxy: Proxy test-proxy started.
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