keepalived主从配置

keepalived主从配置

master 192.168.146.130

backup 192.168.146.131

master

yum install keepalived

vim keepalived.conf

! Configuration File for keepalived

global_defs {
notification_email {
acassen@firewall.loc
failover@firewall.loc
sysadmin@firewall.loc
}
notification_email_from Alexandre.Cassen@firewall.loc
smtp_server 192.168.200.1
smtp_connect_timeout 30
router_id LVS_DEVEL
vrrp_skip_check_adv_addr
vrrp_strict
vrrp_garp_interval 0
vrrp_gna_interval 0
vrrp_mcast_group4 224.1.1.1 广播地址
}

vrrp_instance VI_1 {
state MASTER 主机
interface ens33
virtual_router_id 51
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.146.100
}
}

backup

vim keepalived.conf

! Configuration File for keepalived

global_defs {
notification_email {
acassen@firewall.loc
failover@firewall.loc
sysadmin@firewall.loc
}
notification_email_from Alexandre.Cassen@firewall.loc
smtp_server 192.168.200.1
smtp_connect_timeout 30
router_id LVS_DEVEL
vrrp_skip_check_adv_addr
vrrp_strict
vrrp_garp_interval 0
vrrp_gna_interval 0
vrrp_mcast_group4 224.1.1.1
}

vrrp_instance VI_1 {
state BACKUP 备用机
interface ens33 网卡接口
virtual_router_id 51 路由组id 主从id相同
priority 50 优先级
advert_int 1
authentication {
auth_type PASS
auth_pass 1111 口令
}
virtual_ipaddress {
192.168.146.100
}
}

测试

虚拟ip在主机上

[root@master keepalived]# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN qlen 1
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 00:0c:29:86:c1:46 brd ff:ff:ff:ff:ff:ff
inet 192.168.146.130/24 brd 192.168.146.255 scope global ens33
valid_lft forever preferred_lft forever
inet 192.168.146.100/32 scope global ens33
valid_lft forever preferred_lft forever ##虚拟ip信息
inet6 fe80::20c:29ff:fe86:c146/64 scope link
valid_lft forever preferred_lft forever
3: virbr0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN qlen 1000
link/ether 52:54:00:28:16:4a brd ff:ff:ff:ff:ff:ff
inet 192.168.122.1/24 brd 192.168.122.255 scope global virbr0
valid_lft forever preferred_lft forever
4: virbr0-nic: <BROADCAST,MULTICAST> mtu 1500 qdisc pfifo_fast master virbr0 state DOWN qlen 1000
link/ether 52:54:00:28:16:4a brd ff:ff:ff:ff:ff:ff

停掉主机 systemctl stop keepalived

[root@backup keepalived]# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN qlen 1
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 00:0c:29:5e:a2:83 brd ff:ff:ff:ff:ff:ff
inet 192.168.146.131/24 brd 192.168.146.255 scope global ens33
valid_lft forever preferred_lft forever
inet 192.168.146.100/32 scope global ens33**
valid_lft forever preferred_lft forever** ###虚拟ip漂移到 backup上
inet6 fe80::20c:29ff:fe5e:a283/64 scope link
valid_lft forever preferred_lft forever
3: virbr0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN qlen 1000
link/ether 52:54:00:28:16:4a brd ff:ff:ff:ff:ff:ff
inet 192.168.122.1/24 brd 192.168.122.255 scope global virbr0
valid_lft forever preferred_lft forever
4: virbr0-nic: <BROADCAST,MULTICAST> mtu 1500 qdisc pfifo_fast master virbr0 state DOWN qlen 1000
link/ether 52:54:00:28:16:4a brd ff:ff:ff:ff:ff:ff

抓包

关闭主机前

vird 51 虚拟路由组id

prio 100 优先级

关闭之后

可以看到关闭之后主机的优先级先变成0，然后切换到备用机上 ip从192.168.146.130变成192.168.146.131