正文
keepalive实现web服务器active/passive
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复制提示
https://github.com/acassen/keepalived/blob/v1.2.13/doc/keepalived.conf.SYNOPSIS
http://ngyuki.hatenablog.com/entry/2016/04/04/193949
master
global_defs {
notification_email {
sysadmin@mydomain.com
}
notification_email_from sysadmin@mydomain.com
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id us-1-219
}
vrrp_script chk_http_port {
script "</dev/tcp/127.0.0.1/80"
interval 1
fall 2
rise 1
}
vrrp_sync_group sync_group_1 {
group {
private
public
}
}
vrrp_instance private {
state MASTER
interface em1
virtual_router_id 110
priority 200
advert_int 1
authentication {
auth_type PASS
auth_pass cce068f9
}
virtual_ipaddress {
10.150.1.20/24 dev em1 label em1:0
}
track_script {
chk_http_port weight 0
}
}
vrrp_instance public {
state MASTER
interface em2
virtual_router_id 119
priority 200
advert_int 1
authentication {
auth_type PASS
auth_pass cce068f9
}
virtual_ipaddress {
169.169.34.29/27 dev em2 label em2:0
}
track_script {
chk_http_port weight 0
}
}
backup
global_defs {
notification_email {
sysadmin@mydomain.com
}
notification_email_from sysadmin@mydomain.com
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id us-1-220
}
vrrp_script chk_http_port {
script "</dev/tcp/127.0.0.1/80"
interval 1
fall 2
rise 1
}
vrrp_sync_group sync_group_1 {
group {
private
public
}
}
vrrp_instance private {
state BACKUP
interface em1
virtual_router_id 110
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass cce068f9
}
virtual_ipaddress {
10.150.1.20/24 dev em1 label em1:0
}
track_script {
chk_http_port weight 0
}
}
vrrp_instance public {
state BACKUP
interface em2
virtual_router_id 119
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass cce068f9
}
virtual_ipaddress {
169.169.34.29/27 dev em2 label em2:0
}
track_script {
chk_http_port weight 0
}
}
备注
#1 ip存活检测与服务存活检测
#2 同步组功能，内外网卡有一块有问题，vip就切换
#3 主机的state设置为MASTER，备机的state设置为BACKUP，priority来决定谁为主，谁为从
#4 主备机同一个vrrp_instance的id要一致
测试
#219
ifdown em1 or ifdown em2，2个vip从219飘到220
ifdown em2 or ifdown em2，2个vip又飘回219
/etc/init.d/nginx stop，2个vip从219飘到220
/etc/init.d/nginx start，2个vip又飘回219
