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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