Linux keepalived配置
1.1 安装ipvsadm-1.24-8.1.x86_64.rpm

rpm -ivh ipvsadm-1.24-8.1.x86_64.rpm

1.2.检查ipvsadm是否被正确安装:

[root@proxy1 ~]# ipvsadm
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
  -> RemoteAddress:Port           Forward Weight ActiveConn InActConn

1.3.查看是否存在ip_vs模块:

[root@proxy1 ~]# lsmod | grep ip_vs
ip_vs                 121217  0 

2.1 安装keepalived
下载地址:http://www.keepalived.org/download.htm

tar -zxvf keepalived-1.1.18.tar.gz
cd keepalived-1.1.18
./configure --prefix=/usr --sysconf=/etc --with-kernel-dir=/usr/src/kernels/2.6.18-128.el5-x86_64/

2.2 configure成功后的显示为:

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

2.3 编译，安装

make
make install

3.1 编辑keepalved.conf配置文件（主服务器）

vi /etc/keepalived/keepalived.conf

global_defs {
        router_id NGBOSSLVS_NODE_1
}

vrrp_instance V_NGBOSS {
        state MASTER
        interface eth0
        lvs_sync_daemon_inteface eth0
        virtual_router_id 51
        priority 200
        advert_int 2
        authentication {
                auth_type PASS
                auth_pass 1111
        }
        virtual_ipaddress {
                10.238.15.103
        }
}

3.2 编辑keepalved.conf配置文件（备份服务器）

vi /etc/keepalived/keepalived.conf

global_defs {
        router_id NGBOSSLVS_NODE_2
}

vrrp_instance V_NGBOSS {
        state BACKUP
        interface eth0
        lvs_sync_daemon_inteface eth0
        virtual_router_id 51
        priority 100
        advert_int 2
        authentication {
                auth_type PASS
                auth_pass 1111
        }
        virtual_ipaddress {
                10.238.15.103
        }
}

4.1 将keepalived服务加入开机启动启动。

chkconfig --add keepalived
chkconfig --level 35 keepalived on

4.2 启动keepalived

keepalived

查看keepalived是否已经启动

[root@proxy1 keepalived]# ps -ef | grep keepalived
root      4003     1  0 Apr01 ?        00:00:00 keepalived -D
root      4004  4003  0 Apr01 ?        00:05:32 keepalived -D
root      4019  4003  0 Apr01 ?        00:05:39 keepalived -D

发现VIP 10.238.15.103地址，证明MASTER一起启动浮动IP

[root@proxy1 keepalived]# ip add
1: lo: <LOOPBACK,UP,LOWER_UP> 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
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast qlen 1000
    link/ether 00:23:7d:d1:be:0e brd ff:ff:ff:ff:ff:ff
    inet 10.238.15.101/24 brd 10.238.15.255 scope global eth0
    inet 10.238.15.103/32 scope global eth0
    inet6 fe80::223:7dff:fed1:be0e/64 scope link 
       valid_lft forever preferred_lft forever
3: eth1: <BROADCAST,MULTICAST> mtu 1500 qdisc noop qlen 1000
    link/ether 00:23:7d:d1:be:10 brd ff:ff:ff:ff:ff:ff
4: sit0: <NOARP> mtu 1480 qdisc noop 
    link/sit 0.0.0.0 brd 0.0.0.0
5: bond0: <BROADCAST,MULTICAST,MASTER> mtu 1500 qdisc noop 
    link/ether 00:00:00:00:00:00 brd ff:ff:ff:ff:ff:ff