keepalived配置

之前已经安装完成，接下来我们配置keepalived。

假设我的ip地址如下：

server1:192.168.0.150

server2:192.168.0.157

vip:192.168.0.50

在两台服务器上分别执行如下命令：

[@server_150 keepalived]# mkdir /etc/keepalived

[@server_150 keepalived]# cp /usr/local/keepalived/sbin/keepalived /usr/sbin/

[@server_150 keepalived]# cp /usr/local/keepalived/etc/rc.d/init.d/keepalived /etc/init.d/

[@server_150 keepalived]# cp /usr/local/keepalived/etc/keepalived/keepalived.conf /etc/keepalived/

对应操作的含义：

mkdir /etc/keepalived  ##为keepalived创建配置文件目录，默认配置文件从/etc/keepalived下读取

cp /usr/local/keepalived/sbin/keepalived /usr/sbin/ ##复制keepalived的二进制命令

cp /usr/local/keepalived/etc/rc.d/init.d/keepalived /etc/init.d/  ##提供启动脚本

cp /usr/local/keepalived/etc/keepalived/keepalived.conf /etc/keepalived/ ##keepalived的主配置文件

编辑/etc/keepalived/keepalived.conf文件，主机修改内容如下:

! Configuration File for keepalived

global_defs {

notification_email {

test@localhost.com

}

notification_email_from localhost@localhost.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 {

192.168.0.50

}

}

从配置如下：

! Configuration File for keepalived

global_defs {

notification_email {

test@localhost.com

}

notification_email_from localhost@localhost.com

smtp_server 127.0.0.1

smtp_connect_timeout 30

router_id LVS_DEVEL

}

vrrp_instance VI_1 {

state BACKUP

interface eth0

virtual_router_id 51

priority 80

advert_int 1

authentication {

auth_type PASS

auth_pass 1111

}

virtual_ipaddress {

192.168.0.50

}

}

启动主从的keepalived：

在主从上分布执行：

[@server_150 ~]# keepalived start

[@server_150 ~]# ip addr

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 78:2b:cb:66:44:2a brd ff:ff:ff:ff:ff:ff

inet 192.168.0.150/24 brd 10.10.79.255 scope global eth0

inet 192.168.0.50/32 scope global eth0

inet6 fe80::7a2b:cbff:fe66:442a/64 scope link

valid_lft forever preferred_lft forever

3: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast qlen 1000

link/ether 78:2b:cb:66:44:2c brd ff:ff:ff:ff:ff:ff

inet 220.181.26.82/24 brd 220.181.26.255 scope global eth1

inet6 fe80::7a2b:cbff:fe66:442c/64 scope link

valid_lft forever preferred_lft forever

4: eth2: <BROADCAST,MULTICAST> mtu 1500 qdisc noop qlen 1000

link/ether 78:2b:cb:66:44:2e brd ff:ff:ff:ff:ff:ff

5: eth3: <BROADCAST,MULTICAST> mtu 1500 qdisc noop qlen 1000

link/ether 78:2b:cb:66:44:30 brd ff:ff:ff:ff:ff:ff

6: sit0: <NOARP> mtu 1480 qdisc noop

link/sit 0.0.0.0 brd 0.0.0.0

从机：

[@server_157 ~]# keepalived start

[@server_157 ~]# ip addr

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 78:2b:cb:65:7f:9f brd ff:ff:ff:ff:ff:ff

inet 192.168.0.157/24 brd 10.10.79.255 scope global eth0

inet6 fe80::7a2b:cbff:fe65:7f9f/64 scope link

valid_lft forever preferred_lft forever

3: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast qlen 1000

link/ether 78:2b:cb:65:7f:a1 brd ff:ff:ff:ff:ff:ff

inet 220.181.26.92/24 brd 220.181.26.255 scope global eth1

inet6 fe80::7a2b:cbff:fe65:7fa1/64 scope link

valid_lft forever preferred_lft forever

4: eth2: <BROADCAST,MULTICAST> mtu 1500 qdisc noop qlen 1000

link/ether 78:2b:cb:65:7f:a3 brd ff:ff:ff:ff:ff:ff

5: eth3: <BROADCAST,MULTICAST> mtu 1500 qdisc noop qlen 1000

link/ether 78:2b:cb:65:7f:a5 brd ff:ff:ff:ff:ff:ff

6: sit0: <NOARP> mtu 1480 qdisc noop

link/sit 0.0.0.0 brd 0.0.0.0

现在停止从机的keepalived服务，再次查看主从ip addr，与上面的结果一样。

启动从机的keepalived服务，然后停止主机的keepalived服务。

再次查看主从的ip addr

主机：

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 78:2b:cb:66:44:2a brd ff:ff:ff:ff:ff:ff

inet 192.168.0.150/24 brd 10.10.79.255 scope global eth0

inet6 fe80::7a2b:cbff:fe66:442a/64 scope link

valid_lft forever preferred_lft forever

3: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast qlen 1000

link/ether 78:2b:cb:66:44:2c brd ff:ff:ff:ff:ff:ff

inet 220.181.26.82/24 brd 220.181.26.255 scope global eth1

inet6 fe80::7a2b:cbff:fe66:442c/64 scope link

valid_lft forever preferred_lft forever

4: eth2: <BROADCAST,MULTICAST> mtu 1500 qdisc noop qlen 1000

link/ether 78:2b:cb:66:44:2e brd ff:ff:ff:ff:ff:ff

5: eth3: <BROADCAST,MULTICAST> mtu 1500 qdisc noop qlen 1000

link/ether 78:2b:cb:66:44:30 brd ff:ff:ff:ff:ff:ff

6: sit0: <NOARP> mtu 1480 qdisc noop

link/sit 0.0.0.0 brd 0.0.0.0

从机：

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 78:2b:cb:65:7f:9f brd ff:ff:ff:ff:ff:ff

inet 192.168.0.157/24 brd 10.10.79.255 scope global eth0

&nbs

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