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：
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
router_id LVS_DEVEL
}
vrrp_instance VI_1 {
state MASTER
authentication {
auth_type PASS
}
virtual_ipaddress {
}
}
从配置如下：
! Configuration File for keepalived
global_defs {
notification_email {
test@localhost.com
}
notification_email_from localhost@localhost.com
router_id LVS_DEVEL
}
vrrp_instance VI_1 {
state BACKUP
authentication {
auth_type PASS
}
virtual_ipaddress {
}
}
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
inet 127.0.0.1/8 scope host lo
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
link/ether 78:2b:cb:66:44:2a brd ff:ff:ff:ff:ff:ff
inet6 fe80::7a2b:cbff:fe66:442a/64 scope link
valid_lft forever preferred_lft forever
link/ether 78:2b:cb:66:44:2c brd ff:ff:ff:ff:ff:ff
inet6 fe80::7a2b:cbff:fe66:442c/64 scope link
valid_lft forever preferred_lft forever
link/ether 78:2b:cb:66:44:2e brd ff:ff:ff:ff:ff:ff
link/ether 78:2b:cb:66:44:30 brd ff:ff:ff:ff:ff:ff
6: sit0: <NOARP> mtu 1480 qdisc noop
从机：
[@server_157 ~]# keepalived start
[@server_157 ~]# ip addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue
inet 127.0.0.1/8 scope host lo
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
link/ether 78:2b:cb:65:7f:9f brd ff:ff:ff:ff:ff:ff
inet6 fe80::7a2b:cbff:fe65:7f9f/64 scope link
valid_lft forever preferred_lft forever
link/ether 78:2b:cb:65:7f:a1 brd ff:ff:ff:ff:ff:ff
inet6 fe80::7a2b:cbff:fe65:7fa1/64 scope link
valid_lft forever preferred_lft forever
link/ether 78:2b:cb:65:7f:a3 brd ff:ff:ff:ff:ff:ff
link/ether 78:2b:cb:65:7f:a5 brd ff:ff:ff:ff:ff:ff
6: sit0: <NOARP> mtu 1480 qdisc noop
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
inet 127.0.0.1/8 scope host lo
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
link/ether 78:2b:cb:66:44:2a brd ff:ff:ff:ff:ff:ff
inet6 fe80::7a2b:cbff:fe66:442a/64 scope link
valid_lft forever preferred_lft forever
link/ether 78:2b:cb:66:44:2c brd ff:ff:ff:ff:ff:ff
inet6 fe80::7a2b:cbff:fe66:442c/64 scope link
valid_lft forever preferred_lft forever
link/ether 78:2b:cb:66:44:2e brd ff:ff:ff:ff:ff:ff
link/ether 78:2b:cb:66:44:30 brd ff:ff:ff:ff:ff:ff
6: sit0: <NOARP> mtu 1480 qdisc noop
从机：
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue
inet 127.0.0.1/8 scope host lo
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
link/ether 78:2b:cb:65:7f:9f brd ff:ff:ff:ff:ff:ff
inet6 fe80::7a2b:cbff:fe65:7f9f/64 scope link
valid_lft forever preferred_lft forever
link/ether 78:2b:cb:65:7f:a1 brd ff:ff:ff:ff:ff:ff
inet6 fe80::7a2b:cbff:fe65:7fa1/64 scope link
valid_lft forever preferred_lft forever
link/ether 78:2b:cb:65:7f:a3 brd ff:ff:ff:ff:ff:ff
link/ether 78:2b:cb:65:7f:a5 brd ff:ff:ff:ff:ff:ff
6: sit0: <NOARP> mtu 1480 qdisc noop
发现虚ip已经从主机绑定到从机，配置测试完成。
查看更多关于keepalived配置 - Linux操作系统：Ubuntu_Centos_Debian -的详细内容...