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:
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[root@Nginx keepalived]
# grep -Ev '#|^$' keepalived.conf
! Configuration File
for
keepalived
global_defs {
notification_email {
root@localhost
}
notification_email_from kaadmin@localhost
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id Nginx
}
vrrp_script chk_maintance {
script
"[[ -f /etc/keepalived/down ]] && exit 1 || exit 0"
interval 1
weight -2
}
vrrp_instance VI_1 {
state MASTER
interface eth0
virtual_router_id 51
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass 51ea2a78
}
virtual_ipaddress {
192.168.0.80
/24
label eth0:0
}
track_script {
chk_maintance
}
}
vrrp_instance VI_2 {
state BACKUP
interface eth0
virtual_router_id 52
#id必须修改
priority 90
advert_int 1
authentication {
auth_type PASS
auth_pass abcdefg
#认证字符串必须修改为不一致
}
virtual_ipaddress {
192.168.0.90
/24
label eth0:1
}
track_script {
chk_maintance
}
}
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第二个节点:
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[root@node1 keepalived]
# !egrep
egrep
-
v
'#|^$'
keepalived.conf
! Configuration File
for
keepalived
global_defs {
notification_email {
root@localhost
}
notification_email_from kaadmin@localhost
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
}
}
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配置结果
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[root@Nginx keepalived]
# service keepalived restart; ssh node1 'service keepalived restart'
[root@Nginx 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
[root@node1 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
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3、测试
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调度
[root@Nginx keepalived]
# service keepalived stop
停止 keepalived: [确定]
[root@Nginx 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
[root@node1 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
[root@Nginx keepalived]
# service keepalived start
正在启动 keepalived: [确定]
[root@Nginx 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
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本文转自 元婴期 51CTO博客,原文链接:http://blog.51cto.com/jiayimeng/1896830