keepalived单主模型和nginx双主模型

主程序：keepalived

主配置文件：/etc/keepalived/keepalived.conf

单主模型ipvs：

global_defs {

notification_email {

root@localhost

}

notification_email_from keepalived@localhost

smtp_server 127.0.0.1

smtp_connect_timeout 30

router_id node1

vrrp_mcast_group4 224.0.100.19

}

vrrp_instance VI_1 {

state MASTER

interface eno16777736

virtual_router_id 14

priority 100

advert_int 1

authentication {

auth_type PASS

auth_pass 571f97b2

}

virtual_ipaddress {

10.1.0.93/16 dev eno16777736

}

notify_master “/etc/keepalived/notify.sh master”

notify_backup “/etc/keepalived/notify.sh backup”

notify_fault “/etc/keepalived/notify.sh fault”

}

virtual_server 10.1.0.93 80 {

delay_loop 3

lb_algo rr

lb_kind DR

protocol TCP

sorry_server 127.0.0.1 80

real_server 10.1.0.69 80 {

weight 1

HTTP_GET {

url {

path /

status_code 200

}

connect_timeout 1

nb_get_retry 3

delay_before_retry 1

}

}

real_server 10.1.0.71 80 {

weight 1

HTTP_GET {

url {

path /

status_code 200

}

connect_timeout 1

nb_get_retry 3

delay_before_retry 1

}

}

}

双主模型nginx：

global_defs {

notification_email {

root@localhost

}

notification_email_from keepalived@localhost

smtp_server 127.0.0.1

smtp_connect_timeout 30

router_id node1

vrrp_mcast_group4 224.0.100.19

}

vrrp_script chk_down {

script “[[ -f /etc/keepalived/down ]] && exit 1 || exit 0”

interval 1

weight -5

}

vrrp_script chk_nginx {

script “killall -0 nginx && exit 0 || exit 1”

interval 1

weight -5

fall 2

rise 1

}

vrrp_instance VI_1 {

state MASTER

interface ens33

virtual_router_id 14

priority 100

advert_int 1

authentication {

auth_type PASS

auth_pass 571f97b2

}

virtual_ipaddress {

172.16.0.99/16 dev ens33

}

track_script {

chk_down

chk_nginx

}

notify_master “/etc/keepalived/notify.sh master”

notify_backup “/etc/keepalived/notify.sh backup”

notify_fault “/etc/keepalived/notify.sh fault”

}

vrrp_instance VI_2 {

state MASTER

interface ens33

virtual_router_id 24

priority 96

advert_int 1

authentication {

auth_type PASS

auth_pass 571errrb2

}

virtual_ipaddress {

172.16.0.98/16 dev ens33

}

track_script {

chk_down

chk_nginx

}

notify_master “/etc/keepalived/notify.sh master”

notify_backup “/etc/keepalived/notify.sh backup”

notify_fault “/etc/keepalived/notify.sh fault”

}

#!/bin/bash

#

contact=’root@localhost’

notify() {

mailsubject=”$(hostname) to be $1, vip floating”

mailbody=”$(date +’%F %T’): vrrp transition, $(hostname) changed to be $1″

echo “$mailbody” | mail -s “$mailsubject” $contact

}

case $1 in

master)

notify master

;;

backup)

notify backup

;;

fault)

notify fault

;;

*)

echo “Usage: $(basename $0) {master|backup|fault}”

exit 1

;;

esac