实战案例：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

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原创文章，作者：ItWorker，如若转载，请注明出处：https://blog.ytso.com/52717.html