实现master/master的Keepalivde 双主架构
master/slave的单主架构，同一时间只有一个Keepalived对外提供服务，此主机繁忙，而另一台主机却很空闲，利用率低下，可以使用master/master的双主架构，解决此问题。
master/master的双主架构：
即将两个或以上VIP分别运行在不同的keepalived服务器，以实现服务器并行提供web访问的目的，提高服务器资源利用率
#ha1主机配置
[root@ka1-centos8 ~]#vim /etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {
notification_email {
root@wangxiaochun.com
}
notification_email_from keepalived@localhost
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id ka1.magedu.org
vrrp_mcast_group4 224.0.100.100
}
vrrp_instance VI_1 {
state MASTER #在另一个主机上为BACKUP
interface eth0
virtual_router_id 66 #每个vrrp_instance唯一
priority 100 #在另一个主机上为80
advert_int 1
authentication {
auth_type PASS
auth_pass 12345678
}
virtual_ipaddress {
10.0.0.10/24 dev eth0 label eth0:1 #指定vrrp_instance各自的VIP
}
}
vrrp_instance VI_2 { #添加 VI_2 实例
state BACKUP #在另一个主机上为MASTER
interface eth0
virtual_router_id 88 #每个vrrp_instance唯一
priority 80 #在另一个主机上为100
advert_int 1
authentication {
auth_type PASS
auth_pass 12345678
}
virtual_ipaddress {
10.0.0.20/24 dev eth0 label eth0:1 #指定vrrp_instance各自的VIP
}
}
#ka2主机配置,和ka1配置只需五行不同
[root@ka2-centos8 ~]#vim /etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {
notification_email {
root@wangxiaochun.com
}
notification_email_from keepalived@localhost
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id ka2.magedu.org #修改此行
vrrp_mcast_group4 224.0.100.100
}
vrrp_instance VI_1 {
state BACKUP #此修改行为BACKUP
interface eth0
virtual_router_id 66
priority 80 #此修改行为80
advert_int 1
authentication {
auth_type PASS
auth_pass 12345678
}
virtual_ipaddress {
10.0.0.10/24 dev eth0 label eth0:1
}
}
vrrp_instance VI_2 {
state MASTER #修改此行为MASTER
interface eth0
virtual_router_id 88
priority 100 #修改此行为100
advert_int 1
authentication {
auth_type PASS
auth_pass 12345678
}
virtual_ipaddress {
10.0.0.20/24 dev eth0 label eth0:1
}
}实战案例：利用子配置文件实现master/master的Keepalived双主架构
[root@ka1-centos8 ~]#cat /etc/keepalived/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 ha1.magedu.org
vrrp_skip_check_adv_addr
#vrrp_strict
vrrp_garp_interval 0
vrrp_gna_interval 0
}
include /etc/keepalived/conf.d/*.conf
[root@ka1-centos8 ~]#mkdir /etc/keepalived/conf.d/
[root@ka1-centos8 ~]#cat /etc/keepalived/conf.d/cluster1.conf
vrrp_instance VI_1 {
state MASTER
interface eth0
virtual_router_id 66
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass 123456
}
virtual_ipaddress {
10.0.0.10/24 dev eth0 label eth0:1
}
unicast_src_ip 10.0.0.8
unicast_peer{
10.0.0.18
}
notify_master "/etc/keepalived/notify.sh master"
notify_backup "/etc/keepalived/notify.sh backup"
notify_fault "/etc/keepalived/notify.sh fault"
}
[root@ka1-centos8 ~]#cat /etc/keepalived/conf.d/cluster2.conf
vrrp_instance VI_2 {
state BACKUP
interface eth0
virtual_router_id 88
priority 80
advert_int 1
authentication {
auth_type PASS
auth_pass 123456
}
virtual_ipaddress {
10.0.0.20/24 dev eth0 label eth0:1
}
unicast_src_ip 10.0.0.8
unicast_peer{
10.0.0.18
}
notify_master "/etc/keepalived/notify.sh master"
notify_backup "/etc/keepalived/notify.sh backup"
notify_fault "/etc/keepalived/notify.sh fault"
}
[root@ka1-centos8 ~]#tree /etc/keepalived/
/etc/keepalived/
├── conf.d
│ ├── cluster1.conf
│ └── cluster2.conf
├── keepalived.conf
├── keepalived.conf.bak
└── notify.sh
1 directory, 5 files
[root@ka1-centos8 ~]#
#ka2主机的配置
[root@ka2-centos8 ~]#cat /etc/keepalived/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 ha2.magedu.org
vrrp_skip_check_adv_addr
#vrrp_strict
vrrp_garp_interval 0
vrrp_gna_interval 0
}
include /etc/keepalived/conf.d/*.conf
[root@ka2-centos8 ~]#cat /etc/keepalived/conf.d/cluster1.conf
vrrp_instance VI_1 {
state BACKUP
interface eth0
virtual_router_id 66
priority 80
advert_int 1
authentication {
auth_type PASS
auth_pass 123456
}
virtual_ipaddress {
10.0.0.10/24 dev eth0 label eth0:1
}
unicast_src_ip 10.0.0.18
unicast_peer {
10.0.0.8
}
notify_master "/etc/keepalived/notify.sh master"
notify_backup "/etc/keepalived/notify.sh backup"
notify_fault "/etc/keepalived/notify.sh fault"
}
[root@ka2-centos8 ~]#cat /etc/keepalived/conf.d/cluster2.conf
vrrp_instance VI_2 {
state MASTER
interface eth0
virtual_router_id 88
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass 123456
}
virtual_ipaddress {
10.0.0.20/24 dev eth0 label eth0:1
}
unicast_src_ip 10.0.0.18
unicast_peer{
10.0.0.8
}
notify_master "/etc/keepalived/notify.sh master"
notify_backup "/etc/keepalived/notify.sh backup"
notify_fault "/etc/keepalived/notify.sh fault"
}
[root@ka2-centos8 ~]#
#查看IP
[root@ka1-centos8 ~]#hostname -I
10.0.0.8 10.0.0.10
[root@ka2-centos8 ~]#hostname -I
10.0.0.18 10.0.0.20
#ka1主机故障，测试VIP漂移至ka2主机
[root@ka1-centos8 ~]#killall keepalived
[root@ka1-centos8 ~]#hostname -I
10.0.0.8
[root@ka2-centos8 ~]#hostname -I
10.0.0.18 10.0.0.20 10.0.0.10
#恢复ka1主机
[root@ka1-centos8 ~]#systemctl start keepalived.service
[root@ka1-centos8 ~]#hostname -I
10.0.0.8 10.0.0.10
[root@ka2-centos8 ~]#hostname -I
10.0.0.18 10.0.0.20 实战案例：三个节点的多主架构实现
第一个节点ka1配置：
Vrrp instance 1：MASTER，优先级100
Vrrp instance 2：BACKUP，优先级80
Vrrp instance 3：BACKUP，优先级60
第二个节点ka2配置：
Vrrp instance 1：BACKUP，优先级60
Vrrp instance 2：MASTER，优先级100
Vrrp instance 3：BACKUP，优先级80
第三个节点ka3配置：
Vrrp instance 1：BACKUP，优先级80
Vrrp instance 2：BACKUP，优先级60
Vrrp instance 3：MASTER，优先级100本文链接：http://www.yunweipai.com/35376.html
原创文章，作者：ItWorker，如若转载，请注明出处：https://blog.ytso.com/52717.html