Keepalived单双主模型配置

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Keepalived单双主模型配置

Keepalived单主配置实例：

一、安装keepalived包

[root@keepalived-1 ~]# hostnamectl set-hostname keepalived-1
[root@keepalived-1 ~]# yum install keepalived.x86_64
　　主配置文件：/etc/keepalived/keepalived.conf
主程序文件：/usr/sbin/keepalived

二、进行配置主配置文件：
　　主keepalived服务器：

[root@keepalived-1 ~]# vim /etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {
notification_email {
root@localhost        #定义收件人地址
}
notification_email_from      keepalived@localhost        #邮件发件人地址
smtp_server 127.0.0.1      #发送邮件服务器地址
smtp_connect_timeout 5    #连接邮件服务器的超时时间
router_id 10.10.10.101       #当前路由的id信息网络中的节点标识(物理IP地址或主机名)
vrrp_mcast_group4 224.0.122.22    #组播地址
}
vrrp_instance VI_1 {    #一个虚拟路由器的标识，
state MASTER         #重要选项，初始或状态；只能有一个是MASTER，余下的都应该为BACKUP；
interface ens33        # 绑定为当前虚拟路由器使用的物理接口；一般为网卡地址；
virtual_router_id 11      #当前虚拟路由器的惟一标识（相同组的两台机器必须一致）
priority 100               #当前主机在此虚拟路径器中的优先级；范围1-254；
advert_int 1              #vrrp通告的时间间隔；心跳间隔时间。
authentication {             #认证方式为：域共享密钥
auth_type PASS
auth_pass 11112222        #最多不要超过8位
}
virtual_ipaddress {
10.10.1.1/16 dev ens33    #（接口辅助地址，vip地址，虚拟地址）
}
}
　　备服务器：
　　更改项如下：

[root@keepalived-2 ~]# vim /etc/keepalived/keepalived.conf
global_defs {} 中：
router_id 10.10.10.101     #当前路由的id信息网络中的节点标识(物理IP地址或主机名)
vrrp_instance VI_1 {} 中：
state BACKUP     #重要选项，初始或状态；只能有一个是MASTER，余下的都应该为BACKUP；
priority 98     #当前主机在此虚拟路径器中的优先级；范围1-254
三、启动服务查看日志：

命令参考如下：
启动服务器
[root@keepalived-2 ~]# systemctl start keepalived.service
停止服务
[root@keepalived-1 ~]# systemctl stop keepalived.service
查看服务状态和日志信息
[root@keepalived-1 ~]# systemctl status keepalived.service
查看ip地址信息
[root@keepalived-1 ~]# ip a l
装包工具使用:
[root@localhost etc]# tcpdump -i ens33 host 224.0.122.22
　　1、先启动备keepalived-server抓包并查看日志信息
　　抓包结果如下：

13:39:51.734593 IP 10.10.10.102 > 224.0.122.22: VRRPv2, Advertisement, vrid 11, prio 98, authtype simple, intvl 1s, length 20
13:39:52.737100 IP 10.10.10.102 > 224.0.122.22: VRRPv2, Advertisement, vrid 11, prio 98, authtype simple, intvl 1s, length 20
　　日志结果如下：

May 25 13:39:57 keepalived-2 Keepalived_vrrp[1742]: Sending gratuitous ARP on ens33 for 10.10.1.1
May 25 13:39:57 keepalived-2 Keepalived_vrrp[1742]: VRRP_Instance(VI_1) Sending/queueing gratuitous ARPs on en....1.1 # 224.0.122.22: VRRPv2, Advertisement, vrid 11, prio 98, authtype simple, intvl 1s, length 20
13:47:55.032137 IP 10.10.10.102 > 224.0.122.22: VRRPv2, Advertisement, vrid 11, prio 98, authtype simple, intvl 1s, length 20
13:47:56.033873 IP 10.10.10.102 > 224.0.122.22: VRRPv2, Advertisement, vrid 11, prio 98, authtype simple, intvl 1s, length 20
13:47:56.033883 IP 10.10.10.101 > 224.0.122.22: VRRPv2, Advertisement, vrid 11, prio 100, authtype simple, intvl 1s, length 20# 224.0.122.22: VRRPv2, Advertisement, vrid 11, prio 100, authtype simple, intvl 1s, length 20
13:47:58.041992 IP 10.10.10.101 > 224.0.122.22: VRRPv2, Advertisement, vrid 11, prio 100, authtype simple, intvl 1s, length 20
13:47:59.043760 IP 10.10.10.101 > 224.0.122.22: VRRPv2, Advertisement, vrid 11, prio 100, authtype simple, intvl 1s, length 20
　　日志结果如下：

主：
May 25 13:41:31 keepalived-1 Keepalived_vrrp[1872]: Sending gratuitous ARP on ens33 for 10.10.1.1
May 25 13:41:31 keepalived-1 Keepalived_vrrp[1872]: VRRP_Instance(VI_1) Sending/queueing gratuitous ARPs on ens33 for 10.10.1.1# 224.0.122.22: VRRPv2, Advertisement, vrid 11, prio 98, authtype simple, intvl 1s, length 20
　　Ip地址信息：

ens33:  mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 00:0c:29:92:37:53 brd ff:ff:ff:ff:ff:ff
inet 10.10.10.102/16 brd 10.10.255.255 scope global ens33
valid_lft forever preferred_lft forever
inet 10.10.1.1/16 scope global secondary ens33#