haproxy+keepalived负载均衡之主备切换(centos)

global
daemon
chroot /usr/local/haproxy
maxconn 256
user haproxy
group haproxy
log-send-hostname xiaokk.com
log-tag my_xiaokk
nbproc 1
pidfile /var/run/haproxy.pid
log 127.0.0.1 local0 info
defaults
maxconn 256
mode http
timeout connect 5000ms
timeout client 50000ms
timeout server 50000ms
timeout check 2000
retries 3
option httpclose
option httplog
option dontlognull
option forwardfor
option redispatch
option abortonclose
frontend http-www
bind 192.168.1.100:80
acl ha_policy hdr_reg(host) -i ^(www.test-haproxy.com|test-haproxy.com|demo.test-haproxy.com|www.hellobaby.com)
acl ha_baby hdr_dom(host) -i hellobaby.com
use_backend ha_www if ha_policy
use_backend ha_www if ha_baby
log 127.0.0.1 local0 info
listen admin_status
bind 192.168.1.100:1080
mode http
log 127.0.0.1 local0 info
stats uri /admin?status
stats refresh 30s
stats realm Haproxy Admin Center
stats auth admin:admin
stats hide-version
backend ha_www
mode http
balance source
cookie SERVERID
option httpchk HEAD /index.html
server w1 192.168.1.235:80 cookie 1 check inter 1500 rise 3 fall 3 weight 1
server w2 192.168.1.236:85 cookie 1 check inter 1500 rise 3 fall 3 weight 2

#!/bin/sh
#
# chkconfig: - 85 15
# description: HA-Proxy is a TCP/HTTP reverse proxy which is particularly
# suited for high availability environments.
#
# processname: haproxy
# config: /usr/local/haproxy/conf/haproxy.cfg
# pidfile: /var/run/haproyx.pid
#

# Source function library.
if [ -f /etc/init.d/functions ]; then
. /etc/init.d/functions
elif [ -f /etc/rc.d/init.d/functions ]; then
. /etc/rc.d/init.d/functions
else
exit 0
fi

# Source networking configuration.
. /etc/sysconfig/network

# Check that networking is up
[ ${NETWORKING} = "no" ] && exit 0

[ -f /usr/local/haproxy/conf/haproxy.cfg ] || exit 1

RETVAL=0

# start Haproxy
start() {
/usr/local/haproxy/sbin/haproxy -c -q -f /usr/local/haproxy/conf/haproxy.cfg
if [ $? -ne 0 ]; then
echo "Errors found in configuration file."
return 1
fi

echo -n "Starting Haproxy: "
daemon /usr/local/haproxy/sbin/haproxy -D -f /usr/local/haproxy/conf/haproxy.cfg -p /var/run/haproxy.pid
RETVAL=$?
echo
[ $RETVAL -eq 0 ] && touch /var/lock/subsys/haproxy
return $RETVAL
}

# stop Haproxy
stop() {
echo -n "Shutting down Haproxy: "
killproc haproxy -USR1
RETVAL=$?
echo
[ $RETVAL -eq 0 ] && rm -f /var/lock/subsys/haproxy
[ $RETVAL -eq 0 ] && rm -f /var/run/haproxy.pid
return $RETVAL
}

# restart Haproxy
restart() {
/usr/local/haproxy/sbin/haproxy -c -q -f /usr/local/haproxy/conf/haproxy.cfg
if [ $? -ne 0 ]; then
echo "ERR found in configuration file, check it with 'haproxy check'."
return 1
fi
stop
start
}

# check haproxy
check() {
/usr/local/haproxy/sbin/haproxy -c -q -V -f /usr/local/haproxy/conf/haproxy.cfg
}

# rsstatus
rhstatus() {
status haproxy
}

# condrestart
condrestart() {
[ -e /var/lock/subsys/haproxy ] && restart || :
}

# See how we were called.
case "$1" in
start)
start
;;
stop)
stop
;;
restart)
restart
;;
reload)
restart
;;
condrestart)
condrestart
;;
status)
rhstatus
;;
check)
check
;;
*)
echo $"Usage: haproxy {start|stop|restart|reload|condrestart|status|check}"
RETVAL
esac

exit $RETVAL

! Configuration File for keepalived
global_defs {
router_id LVS_1
}
vrrp_script chk_haproxy {
script "/etc/keepalived/check_haproxy.sh"
interval 2
weight 2
}
vrrp_instance VI_1 {
state MASTER
priority 99
advert_int 1
virtual_router_id 50
garp_master_delay 1
interface eth0
authentication {
auth_type PASS
auth_pass Kxiaokk345Pix
}
track_interface {
eth0
}
virtual_ipaddress {
192.168.1.100
}
track_script {
chk_haproxy
}
notify_master "/etc/keepalived/mailnotify.py master"
notify_backup "/etc/keepalived/mailnotify.py backup"
notify_fault "/etc/keepalived/mailnotify.py fault"
}

! Configuration File for keepalived
global_defs {
router_id LVS_2
}
vrrp_script chk_haproxy {
script "/etc/keepalived/check_haproxy.sh"
interval 5
weight 2
}
vrrp_instance VI_1 {
state BACKUP
priority 96
advert_int 1
virtual_router_id 50
garp_master_delay 1
interface eth0
authentication {
auth_type PASS
auth_pass Kxiaokk345Pix
}
track_interface {
eth0
}
virtual_ipaddress {
192.168.1.100
}

track_script {
chk_haproxy
}
notify_master "/etc/keepalived/mailnotify.py master"
notify_backup "/etc/keepalived/mailnotify.py backup"
notify_fault "/etc/keepalived/mailnotify.py fault"
}
 

#!/bin/bash
#
# desc: check haproxy service
#
A=`ip address show eth0 | grep 192.168.1.100 | wc -l`
B=`ps -C haproxy --no-heading | wc -l`

if [ $A -eq 1 ]; then
if [ $B -eq 0 ]; then
/usr/local/haproxy/haproxy.sh start
sleep 3
fi
fi
 

#!/usr/bin/python
#coding: utf-8
from email.MIMEMultipart import MIMEMultipart
from email.MIMEText import MIMEText
from email.MIMEImage import MIMEImage
from email.Header import Header
import sys
import smtplib

#-------------------------------
# file: mailnotify.py
# desc: send notify email
#
#-------------------------------
strFrom = 'toplover@sina.com'
strTo = 'toplover@126.com'
smtp_server = 'smtp.sina.com'
smtp_user = 'toplover'
smtp_pass = 'xxx***xxx'

if sys.argv[1] != "master" and sys.argv[1] != "backup" and sys.argv[1] != "fault":
sys.exit()
else:
notify_type = sys.argv[1]

mail_title = "[crt] Haproxy-notify-info"
mail_body_plain = notify_type + 'alive,please check it now'
mail_body_html = '<b><font color=red>' + notify_type + 'alive,please check it now'

msgRoot = MIMEMultipart('related')
msgRoot['Subject'] = Header(mail_title,'utf-8')
msgRoot['From'] = strFrom
msgRoot['To'] = strTo

msgAlternative = MIMEMultipart('alternative')
msgRoot.attach(msgAlternative)

msgText = MIMEText(mail_body_plain, 'plain', 'utf-8')
msgAlternative.attach(msgText)

msgText = MIMEText(mail_body_html, 'html', 'utf-8')
msgAlternative.attach(msgText)

smtp = smtplib.SMTP()
smtp.connect(smtp_server)
smtp.login(smtp_user,smtp_pass)
smtp.sendmail(strFrom, strTo, msgRoot.as_string())
smtp.quit()