一、keepalived双实例
keepalived在master/backup工作模式下，会有一个主机处于闲置，所以keepalived可以使用vrrp的特性配置双master模式，使资源最大化。
1、承接上文配置 ---> keepalived基础配置
2、双主配置
第一个节点：
[[email protected] keepalived]# grep -Ev ‘#|^$‘ keepalived.conf
! Configuration File for keepalived
global_defs {
notification_email {
[email protected]
}
notification_email_from [email protected]
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id Nginx
}
vrrp_script chk_maintance {
script "[[ -f /etc/keepalived/down ]] && exit 1 || exit 0"
interval 1
weight -2
}
vrrp_instance VI_1 {
state MASTER
interface eth0
virtual_router_id 51
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass 51ea2a78
}
virtual_ipaddress {
192.168.0.80/24 label eth0:0
}
track_script {
chk_maintance
}
}
vrrp_instance VI_2 {
state BACKUP
interface eth0
virtual_router_id 52 #id必须修改
priority 90
advert_int 1
authentication {
auth_type PASS
auth_pass abcdefg #认证字符串必须修改为不一致
}
virtual_ipaddress {
192.168.0.90/24 label eth0:1
}
track_script {
chk_maintance
}
}
第二个节点：
[[email protected] keepalived]# !egrep
egrep -v ‘#|^$‘ 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 node1
}
vrrp_script chk_maintance {
script "[[ -f /etc/keepalived/down ]] && exit 1 || exit 0"
interval 1
weight -2
}
vrrp_instance VI_1 {
state BACKUP
interface eth0
virtual_router_id 51
priority 90
advert_int 1
authentication {
auth_type PASS
auth_pass 51ea2a78
}
virtual_ipaddress {
192.168.0.80/24 label eth0:0
}
track_script {
chk_maintance
}
}
vrrp_instance VI_2 {
state MASTER
interface eth0
virtual_router_id 52
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass abcdefg
}
virtual_ipaddress {
192.168.0.90/24 label eth0:1
}
track_script {
chk_maintance
}
}
配置结果
[[email protected] keepalived]# service keepalived restart; ssh node1 ‘service keepalived restart‘ [[email protected] keepalived]# ip addr | grep eth0 2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000 inet 192.168.0.104/24 brd 192.168.0.255 scope global eth0 inet 192.168.0.80/24 scope global secondary eth0:0 [[email protected] keepalived]# ip addr | grep eth0 2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000 inet 192.168.0.40/24 brd 192.168.0.255 scope global eth0 inet 192.168.0.90/24 scope global secondary eth0:1
3、测试
调度 [[email protected] keepalived]# service keepalived stop 停止 keepalived： [确定] [[email protected] keepalived]# ip add | grep eth0 2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000 inet 192.168.0.104/24 brd 192.168.0.255 scope global eth0 [[email protected] keepalived]# ip add | grep eth0 2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000 inet 192.168.0.40/24 brd 192.168.0.255 scope global eth0 inet 192.168.0.90/24 scope global secondary eth0:1 inet 192.168.0.80/24 scope global secondary eth0:0 抢回 [[email protected] keepalived]# service keepalived start 正在启动 keepalived： [确定] [[email protected] keepalived]# ip add | grep eth0 2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000 inet 192.168.0.104/24 brd 192.168.0.255 scope global eth0 inet 192.168.0.80/24 scope global secondary eth0:0
时间： 2024-12-29 12:31:59