Node1: 10.0.17.154
Node2: 10.0.17.155
VIP: 10.0.17.158
环境 centos5.2
##########################LVS+Keepalived########################
1、安装ipvsadm
yum -y install ipvsadm
2、安装keepalived
[root@mysql-n2 ~]# wget
[root@mysql-n2 ~]# tar zxvf keepalived-1.1.15.tar.gz
[root@mysql-n2 ~]# cd keepalived-1.1.15
[root@mysql-n2 keepalived-1.1.15]# ./configure --prefix=/ --mandir=/usr/local/share/man/ --with-kernel-dir=/usr/src/kernels/2.6.18-194.el5-x86_64/
配置后会出现如下结果,则配置正确:
Keepalived configuration
------------------------
Keepalived version : 1.1.15
Compiler : gcc
Compiler flags : -g -O2
Extra Lib : -lpopt -lssl -lcrypto
Use IPVS Framework : Yes
IPVS sync daemon support : Yes
Use VRRP Framework : Yes
Use LinkWatch : No
Use Debug flags : No
[root@mysql-n2 keepalived-1.1.15]make && make install
[root@mysql-n2 keepalived-1.1.15]# cd /etc/keepalived/
[root@mysql-n2 keepalived-1.1.15]# vim keepalived.conf
3.keepalived.conf配置细节:
! Configuration File for keepalived
global_defs {
notification_email {
zhangshengdongly@gmail.com
}
notification_email_from zhangshengdongly@gmail.com
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id LVS_DEVEL
}
vrrp_instance VI_1 {
state MASTER
interface eth0
virtual_router_id 51
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
10.0.17.158
}
}
virtual_server 10.0.17.158 443 {
delay_loop 6
lb_algo wlc
lb_kind DR
persistence_timeout 50
protocol TCP
real_server 10.0.17.154 443 {
weight 3
TCP_CHECK {
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
}
}
real_server 10.0.17.155 443 {
weight 1
TCP_CHECK {
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
}
}
}
BACKUP:只要修改"state MASTER"为"state BACKUP"
将 "priority 100"更改为"priority 80"
4.配置realserver脚本:(由于只有两台主机,所以既当lvs,也当realserver)
疑问:netmask 255.255.255.255 up修改为netmask 255.255.252.0 up就出现问题
[root@mysql-n2 keepalived-1.1.15]vim realserver
#!/bin/bash
#description : start realserver
VIP=192.168.1.250
/etc/rc.d/init.d/functions
case "$1" in
start)
echo " start LVS of REALServer"
/sbin/ifconfig lo:0 $VIP broadcast $VIP netmask 255.255.255.255 up
echo "1" >/proc/sys/net/ipv4/conf/lo/arp_ignore
echo "2" >/proc/sys/net/ipv4/conf/lo/arp_announce
echo "1" >/proc/sys/net/ipv4/conf/all/arp_ignore
echo "2" >/proc/sys/net/ipv4/conf/all/arp_announce
;;
stop)
/sbin/ifconfig lo:0 down
echo "close LVS Directorserver"
echo "0" >/proc/sys/net/ipv4/conf/lo/arp_ignore
echo "0" >/proc/sys/net/ipv4/conf/lo/arp_announce
echo "0" >/proc/sys/net/ipv4/conf/all/arp_ignore
echo "0" >/proc/sys/net/ipv4/conf/all/arp_announce
;;
*)
echo "Usage: $0 {start|stop}"
exit 1
esac
[root@mysql-n2 keepalived-1.1.15]# chmod +x realserver
[root@mysql-n2 keepalived-1.1.15]# ./realserver start
5.主&副keepalived启动:
[root@mysql-n2 ~]# /etc/init.d/keepalived start
Starting keepalived: [ OK ]
[root@mysql-n1 keepalived]# /etc/init.d/keepalived start
Starting keepalived: [ OK ]
6.查看日志&IP,看看是否启动成功,ip是否绑定
[root@mysql-n2 ~]# tail -f /var/log/messages
Aug 8 14:47:05 mysql-n2 Keepalived_healthcheckers: SMTP alert successfully sent.
Aug 8 14:47:05 mysql-n2 Keepalived_healthcheckers: SMTP alert successfully sent.
Aug 8 14:47:06 mysql-n2 Keepalived_vrrp: VRRP_Instance(VI_1) Entering MASTER STATE
Aug 8 14:47:06 mysql-n2 Keepalived_vrrp: VRRP_Instance(VI_1) setting protocol VIPs.
Aug 8 14:47:06 mysql-n2 Keepalived_vrrp: VRRP_Instance(VI_1) Sending gratuitous ARPs on eth0 for 10.0.17.158
Aug 8 14:47:06 mysql-n2 Keepalived_vrrp: Netlink reflector reports IP 10.0.17.158 added
Aug 8 14:47:06 mysql-n2 Keepalived_healthcheckers: Netlink reflector reports IP 10.0.17.158 added
Aug 8 14:47:06 mysql-n2 avahi-daemon[3052]: Registering new address record for 10.0.17.158 on eth0.
Aug 8 14:47:11 mysql-n2 Keepalived_vrrp: VRRP_Instance(VI_1) Sending gratuitous ARPs on eth0 for 10.0.17.158
Aug 8 14:47:31 mysql-n2 avahi-daemon[3052]: Invalid query packet.
[root@mysql-n2 ~]# ip a
1: lo: mtu 16436 qdisc noqueue
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
inet 10.0.17.158/32 brd 10.0.17.158 scope global lo:0
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eth0: mtu 1500 qdisc pfifo_fast qlen 1000
link/ether 00:0c:29:ed:e8:c6 brd ff:ff:ff:ff:ff:ff
inet 10.0.17.154/22 brd 10.0.19.255 scope global eth0
inet 10.0.17.158/32 scope global eth0
inet6 fe80::20c:29ff:feed:e8c6/64 scope link
valid_lft forever preferred_lft forever
3: sit0: mtu 1480 qdisc noop
link/sit 0.0.0.0 brd 0.0.0.0
LVS+keepalived成功安装后,开始配置mysql的双主。
第一步:安装mysql5.5 http://blog.chinaunix.net/uid-26446098-id-3261946.html
第二步:配置mysql双主 http://blog.chinaunix.net/uid-26446098-id-3267556.html
配置完之后,插入几条数据。
让第一台宕机,看看ip是否漂移,如成功,则安装成功。
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