keepalived+haproxy+nginx
keepalived+haproxy+nginxvm1-keepalived+haproxy
eth0 172.16.3.2/16 up
eth1 192.168.1.2/24 up
vm2-keepalived+haproxy
eth0 172.16.3.3/16 up
eth1 192.168.1.3/24 up
vm3-web:
eth0 192.168.1.1/24 up
vm4-web:
ech0 192.168.1.10/24 up
VRRP: 172.16.3.88/16
测试机本机：
vm1-keepalived+haproxy配置
# ifconfig eth0 172.16.3.2/16 up
# ifconfig eth1 192.168.1.2/24 up
# yum install keepalived haproxy -y
haproxy配置文件：
# vim /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 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
frontend main
bind :80
bind :8088
# acl clear dst_port 8088
#acl login path_beg /login
#redirect location http://www.baidu.com if login
#redirect prefix / if clear
# reqadd X-Proto:\ SSL if clear
#rspadd X-Via:\ haproxy if clear
#option forwardfor except 127.0.0.0/8
#acl url_static path_beg -i /images /stylesheets /vedios /javascript
#acl url_static path_end -i .jpg .html .css .js .png .gif
#use_backend static if url_static
default_backend webservers
#backend static
# balance roundrobin
# server s1 192.168.1.10:80check port 80
# server b1 127.0.01:8080 backup check port 8080
backend webservers
balance roundrobin
#cookie ninghongliang insert nocache
server s2 192.168.1.1:80 check port 80
server s1 192.168.1.10:80check port 80
server b1 127.0.01:8080 backup check port 8080
stats enable
stats hide-version
stats uri /haha?stats
stats scope .
stats realmHAPorx\ boy
stats auth admin1:admin
stats admin if TRUE
keepalived配置文件
! Configuration File for keepalived
global_defs {
notification_email {
root@localhost
}
notification_email_from ning@qq.com
smtp_server 127.0.0.1
smtp_connect_timeout 30
}
vrrp_script chk_sched_down {
script "[ -e /etc/keepalived/down ] && exit 1 || exit 0"
interval 2
weight -50
fall 2
rise 1
}
vrrp_script chk_haproxy {
script "/etc/keepalived/check_haproxy.sh"
interval 2
weight -50
fall 2
rise 1
}
vrrp_instance VI_1 {
state MASTER
interface eth0
virtual_router_id 77
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass ning
}
virtual_ipaddress {
172.16.3.88
}
track_script {
chk_sched_down
chk_haproxy
}
}
vm2-keepalived+haproxy配置
# ifconfig eth0 172.16.3.3/16 up
# ifconfig eth1 192.168.1.3/24 up
# yum install keepalived haproxy -y
haproxy配置文件：(这里的配置和上面的一样，不在此说明)
keepalived配置文件
! Configuration File for keepalived
global_defs {
notification_email {
root@localhost
}
notification_email_from ning@qq.com
smtp_server 127.0.0.1
smtp_connect_timeout 30
}
vrrp_script chk_sched_down {
script "[ -e /etc/keepalived/down ] && exit 1 || exit 0"
interval 2
weight -50
fall 2
rise 1
}
vrrp_script chk_haproxy {
script "/etc/keepalived/check_haproxy.sh"
interval 2
weight -50
fall 2
rise 1
}
vrrp_instance VI_1 {
stateBACKUP
interface eth0
virtual_router_id 77
priority 99
advert_int 1
authentication {
auth_type PASS
auth_pass ning
}
virtual_ipaddress {
172.16.3.88
}
track_script {
chk_sched_down
chk_haproxy
}
}
这里面使用的检测脚本haprxoy脚本chk_haproxy(测试检测为3秒后如果haproxy还不能上线，就关闭keepalived)
#!/bin/bash
A=`ps -C haproxy --no-header |wc -l`
if [ $A -eq 0 ];then
/usr/sbin/haproxy -f /etc/haproxy/haproxy.cfg
sleep 3
if [ `ps -C haproxy --no-header |wc -l` -eq 0 ];then
/etc/init.d/keepalived stop
fi
fi
vm3-web:配置
# ifconfig eth0 192.168.1.1/24 up
# yum install nginx -y
# echo "192.168.1.1" > /usr/share/nginx/html/index.html
vm4-web:配置
# ifconfig eth0 192.168.1.10/24 up
# yum install nginx -y
# echo "192.168.1.10" > /usr/share/nginx/html/index.html
测试：
（1）主备同时执行 # ip addr show
主： eth0:mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 00:0c:29:d7:f7:9c brd ff:ff:ff:ff:ff:ff
inet 172.16.3.2/16 brd 172.16.255.255 scope global eth0
inet 172.16.3.88/32 scope global eth0
valid_lft forever preferred_lft forever
从： eth0:mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 00:0c:29:0b:35:6a brd ff:ff:ff:ff:ff:ff
inet 172.16.3.3/16 brd 172.16.255.255 scope global eth0
inet6 fe80::20c:29ff:fe0b:356a/64 scope link
valid_lft forever preferred_lft forever
（2）停掉主上的haproxy，2秒后keepalived会自动将其再次启动
（3）停掉主的keepalived，备机马上接管服务
eth0:mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 00:0c:29:0b:35:6a brd ff:ff:ff:ff:ff:ff
inet 172.16.3.3/16 brd 172.16.255.255 scope global eth0
inet 172.16.3.88/32 scope global eth0
valid_lft forever preferred_lft forever
（4）本机测试：(因为上面只是简单的定义了轮训，没有定义动静分离)
http://172.16.3.88
有图有真相
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