MySQL+LVS+TUN高可用
LVS-VIP：192.168.159.250LVS-server：192.168.159.91
mysql-server：192.168.151.150
####系统版本CentOS6.4###
####由于LVS DR模式基于同一网段，MySQL实例基于不同网段，所以选择TUN模式，本例由于是测试环境，所有只有一台realserver。
一、在lvs-server安装ipvsadm和keepalived
1.安装ipvsadm
1.1初始化环境
yum install libnl* libpopt* kernel-devel
###安装popt-static###
wget http://mirrors.163.com/centos/6/os/x86_64/Packages/popt-static-1.13-7.el6.x86_64.rpm
rpm -ivh popt-static-1.13-7.el6.x86_64.rpm
###环境初始化完毕###
1.2创建软连接
ln -s /usr/src/kernels/2.6.32-358.el6.x86_64/ /usr/src/linux
1.3安装ipvsadm
cd /usr/local/src/ipvsadm-1.26
make
make install
1.4测试ipvsadm
ipvsadm -v
#ipvsadm v1.26 2008/5/15 (compiled with popt and IPVS v1.2.1)
安装完成
2.安装keepalived
yum -y install popt-devel openssl openssl-devel
cd /usr/local/src/keepalived-1.2.13
./configure --prefix=/usr/local/src/keepalived --with-kernel-dir=/usr/src/kernels/2.6.32-358.el6.x86_64/
make && make install
cp /usr/local/src/keepalived-1.2.13/sbin/keepalived /usr/sbin/
cp /usr/local/src/keepalived-1.2.13/etc/sysconfig/keepalived /etc/sysconfig/
cp /usr/local/src/keepalived-1.2.13/etc/rc.d/init.d/keepalived /etc/init.d/
chkconfig --add keepalived
chkconfig keepalived on
二、整合keepalived和lvs
1.1添加keepalived.conf配置文件
! Configuration File for keepalived
vrrp_instance VIP_91
{
state MASTER
interface eth0
virtual_router_id 91
priority 100
advert_int 2
smtp_alert
authentication
{
auth_type PASS
auth_pass 123456
}
virtual_ipaddress
{
192.168.159.250/24
}
}
virtual_server 192.168.159.250 3358 {
delay_loop 6
lb_algo rr
#lb_kind DR
lb_kind TUN
persistence_timeout 60
protocol TCP
real_server 192.168.151.150 3358 {
weight 3
TCP_CHECK {
connect_timeout 10
nb_get_retry 3
delay_before_retry 3
connect_port 3358
}
}
}
1.2lvs-server绑定vip到tunl0网卡
###vim /usr/locsl/src/ipvsdr.sh###
#!/bin/bash
VIP=192.168.159.250
RIP1=192.168.151.150
. /etc/rc.d/init.d/functions
case "$1" in
start)
echo "start LVS of DirectorServer"
#Set the Virtual IP Address
/sbin/ifconfig tunl0 $VIP broadcast $VIP netmask 255.255.255.255 up
/sbin/route add -host $VIP dev tunl0
#Clear IPVS Table
/sbin/ipvsadm -C
#Set Lvs
/sbin/ipvsadm -A -t $VIP:3358 -s rr
/sbin/ipvsadm -a -t $VIP:3358 -r $RIP1:3358 -g
#Run Lvs
/sbin/ipvsadm
;;
stop)
echo "close LVS Directorserver"
ifconfig tunl0 down
/sbin/ipvsadm -C
;;
*)
echo "Usage: $0 {start|stop}"
exit 1
esac
#####执行ipvsdr.sh脚本、启动keepalived#####
sh ipvsdr.sh
service keepalived restart
####测试vip可用性######
# ping 192.168.159.250 -c 4
PING 192.168.159.250 (192.168.159.250) 56(84) bytes of data.
64 bytes from 192.168.159.250: icmp_seq=1 ttl=64 time=10.6 ms
64 bytes from 192.168.159.250: icmp_seq=2 ttl=64 time=0.053 ms
64 bytes from 192.168.159.250: icmp_seq=3 ttl=64 time=0.038 ms
64 bytes from 192.168.159.250: icmp_seq=4 ttl=64 time=0.049 ms
--- 192.168.159.250 ping statistics ---
4 packets transmitted, 4 received, 0% packet loss, time 3000ms
rtt min/avg/max/mdev = 0.038/2.692/10.628/4.581 ms
1.3real-server绑定vip并禁止ARP广播响应
###vim realserver.sh###
#!/bin/bash
VIP=192.168.159.250
case $1 in
start)
ifconfig tunl0 up
/sbin/ifconfig tunl0 $VIP broadcast $VIP netmask 255.255.255.255 up
/sbin/route add -host $VIP dev tunl0
echo "1" > /proc/sys/net/ipv4/conf/tunl0/arp_ignore
echo "2" > /proc/sys/net/ipv4/conf/tunl0/arp_announce
echo "1" > /proc/sys/net/ipv4/conf/all/arp_ignore
echo "2" > /proc/sys/net/ipv4/conf/all/arp_announce
echo 0 > /proc/sys/net/ipv4/conf/tunl0/rp_filter
echo 1 > /proc/sys/net/ipv4/conf/tunl0/forwarding
echo 1 > /proc/sys/net/ipv4/ip_forward
sysctl -p >/dev/null 2>&1
echo "RealServer Start OK"
;;
stop)
ifconfig tunl0 down
route del $VIP >/dev/null 2>&1
echo "0" > /proc/sys/net/ipv4/conf/tunl0/arp_ignore
echo "0" > /proc/sys/net/ipv4/conf/tunl0/arp_announce
echo "0" > /proc/sys/net/ipv4/conf/all/arp_ignore
echo "0" > /proc/sys/net/ipv4/conf/all/arp_announce
echo "RealServer Stoped"
;;
*)
echo "Usage: $0 {start|stop}"
exit 1
esac
exit 0
最后，测试mysql连接状态，查看lvs调度信息
# ipvsadm -ln
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
-> RemoteAddress:Port Forward Weight ActiveConn InActConn
TCP192.168.159.250:3358 rr persistent 60
-> 192.168.151.150:3358 Tunnel3 1 0
至此搭建完毕。
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