keepalived 多節點配置方法
準備3臺主機
| server | hostname | ip |
|---|---|---|
| keepalived | s1 | 172.20.27.10 |
| keepalived | s2 | 172.20.27.11 |
| keepalived | s3 | 172.20.27.12 |
S1節點配置
1.修改配置文件
[root@s1 ~]# vim /etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {
notification_email {
[email protected]
}
notification_email_from [email protected]
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id s1.mylinuxops.com
vrrp_skip_check_adv_addr
#vrrp_strict
vrrp_iptables #需要關閉讓keepalived產生iptables規則
vrrp_garp_interval 0
vrrp_gna_interval 0
}
vrrp_instance VI_1 {
state Master
interface ens33
virtual_router_id 27
priority 100 #需要注意各個節點的優先級，當主機點掛了之後，其餘的節點會根據，優先級的高低選舉出，新的主機點。
advert_int 2
authentication {
auth_type PASS
auth_pass 1111
}
unicast_src_ip 172.20.27.10
unicast_peer {
172.20.27.11 #單播配置時需要將所有的節點都加入
172.20.27.12
}
virtual_ipaddress {
172.20.27.100 dev ens33 label ens33:0
}
}2.啓動服務
[root@s1 ~]# systemctl start keepaliveds2節點配置
1.修改配置文件
[root@s2 ~]# vim /etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {
notification_email {
[email protected]
}
notification_email_from [email protected]
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id s2.mylinuxops.com
vrrp_skip_check_adv_addr
#vrrp_strict
vrrp_iptables
vrrp_garp_interval 0
vrrp_gna_interval 0
}
vrrp_instance VI_1 {
state BACKUP
interface ens33
virtual_router_id 27
priority 80
advert_int 2
authentication {
auth_type PASS
auth_pass 1111
}
unicast_src_ip 172.20.27.11
unicast_peer {
172.20.27.10
172.20.27.12
}
virtual_ipaddress {
172.20.27.100 dev ens33 label ens33:0
}
}2.啓動服務
[root@s2 ~]# systemctl start keepaliveds3節點配置
1.修改配置文件
[root@s3 ~]# vim /etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {
notification_email {
[email protected]
}
notification_email_from [email protected]
smtp_server 172.0.0.1
smtp_connect_timeout 30
router_id s3.mylinuxops.com
vrrp_skip_check_adv_addr
#vrrp_strict
vrrp_iptables
vrrp_garp_interval 0
vrrp_gna_interval 0
}
vrrp_instance VI_1 {
state BACKUP
interface ens33
virtual_router_id 27
priority 50
advert_int 2
authentication {
auth_type PASS
auth_pass 1111
}
unicast_src_ip 172.20.27.12
unicast_peer {
172.20.27.10
172.20.27.11
}
virtual_ipaddress {
172.20.27.100 dev ens33 label ens33:0
}
}2.啓動服務
[root@s3 ~]# systemctl start keepalived測試
查看當前VIP所在主機
[root@s1 ~]# ifconfig
ens33: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 172.20.27.10 netmask 255.255.0.0 broadcast 172.20.255.255
inet6 fe80::20c:29ff:fec5:123c prefixlen 64 scopeid 0x20<link>
ether 00:0c:29:c5:12:3c txqueuelen 1000 (Ethernet)
RX packets 283462 bytes 22421914 (21.3 MiB)
RX errors 0 dropped 12 overruns 0 frame 0
TX packets 50515 bytes 9459257 (9.0 MiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
ens33:0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 172.20.27.100 netmask 255.255.255.255 broadcast 0.0.0.0
ether 00:0c:29:c5:12:3c txqueuelen 1000 (Ethernet)
lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536
inet 127.0.0.1 netmask 255.0.0.0
inet6 ::1 prefixlen 128 scopeid 0x10<host>
loop txqueuelen 1000 (Local Loopback)
RX packets 2 bytes 140 (140.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 2 bytes 140 (140.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0vip在s1主機上，當s1節點掛了之後，由於s2節點的優先級高於s3，所以s2獲得了vip
[root@s2 ~]# ifconfig
ens33: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 172.20.27.11 netmask 255.255.0.0 broadcast 172.20.255.255
inet6 fe80::20c:29ff:fe4d:1ce3 prefixlen 64 scopeid 0x20<link>
ether 00:0c:29:4d:1c:e3 txqueuelen 1000 (Ethernet)
RX packets 271011 bytes 21681786 (20.6 MiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 16217 bytes 1380138 (1.3 MiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
ens33:0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 172.20.27.100 netmask 255.255.255.255 broadcast 0.0.0.0
ether 00:0c:29:4d:1c:e3 txqueuelen 1000 (Ethernet)
lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536
inet 127.0.0.1 netmask 255.0.0.0
inet6 ::1 prefixlen 128 scopeid 0x10<host>
loop txqueuelen 1000 (Local Loopback)
RX packets 6 bytes 482 (482.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 6 bytes 482 (482.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
當s2節點也掛了之後，s3節點獲得vip
[root@s3 ~]# ifconfig
ens33: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 172.20.27.12 netmask 255.255.0.0 broadcast 172.20.255.255
inet6 fe80::20c:29ff:fe99:608a prefixlen 64 scopeid 0x20<link>
ether 00:0c:29:99:60:8a txqueuelen 1000 (Ethernet)
RX packets 20519 bytes 1491603 (1.4 MiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 1775 bytes 215565 (210.5 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
ens33:0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 172.20.27.100 netmask 255.255.255.255 broadcast 0.0.0.0
ether 00:0c:29:99:60:8a txqueuelen 1000 (Ethernet)
lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536
inet 127.0.0.1 netmask 255.0.0.0
inet6 ::1 prefixlen 128 scopeid 0x10<host>
loop txqueuelen 1000 (Local Loopback)
RX packets 106 bytes 8744 (8.5 KiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 106 bytes 8744 (8.5 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0