esac
exit 0
添加加可执行的权限
chmod +x /etc/rc.d/init.d/realserver.sh
注：四台sql节点都要进行此步操作
五、启动LVS节点（mysql cluster中的sql节点)
/etc/rc.d/init.d/realserver.sh start
六、启动调度器（keepalived的服务器端启动）
/etc/rc.d/init.d/keepalived start
启动后可以用命令 tail -f /var/log/messages 进行查看
若看到如下提示，则表示配置成功。
1. [root@sg204 mysql-cluster]# tail -f /var/log/messages
2. May 29 17:21:01 sg204 Keepalived_vrrp: Opening file '/etc/keepa
lived/keepalived.conf'.
3. May 29 17:21:01 sg204 Keepalived_vrrp: Configuration is using :
63921 Bytes
4. May 29 17:21:01 sg204 Keepalived_healthcheckers: Using LinkWatc
h kernel netlink reflector...
5. May 29 17:21:01 sg204 Keepalived_vrrp: Using LinkWatch kernel n
etlink reflector...
6. May 29 17:21:01 sg204 Keepalived_healthcheckers: Activating hea
ltchecker for service [172.16.48.206:3306]
7. May 29 17:21:01 sg204 Keepalived_healthcheckers: Activating hea
ltchecker for service [172.16.48.207:3306]
8. May 29 17:21:01 sg204 Keepalived_healthcheckers: Activating hea
ltchecker for service [172.16.48.208:3306]
9. May 29 17:21:01 sg204 Keepalived_healthcheckers: Activating hea
ltchecker for service [172.16.48.211:3306]
10.May 29 17:21:01 sg204 Keepalived_vrrp: VRRP sockpool: [ifindex(
3), proto(112), fd(10,11)]
11.May 29 17:21:02 sg204 Keepalived_vrrp: VRRP_Instance(VI_MYSQL)
Transition to MASTER STATE
12.May 29 17:21:03 sg204 Keepalived_vrrp: VRRP_Instance(VI_MYSQL)
Entering MASTER STATE
13.May 29 17:21:03 sg204 Keepalived_vrrp: VRRP_Instance(VI_MYSQL)
setting protocol VIPs.