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
    inet 192.168.0.50/32 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

发现虚ip已经从主机绑定到从机，配置测试完成。