如何快速构建高可用集群(Keepalived+Haproxy+Nginx)
yum -y install keepalived # 两节点都需部署# 172.16.25.109
# vi /etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {
notification_email {
root@localhost
}
notification_email_from admin@lnmmp.com
smtp_connect_timeout 3
smtp_server 127.0.0.1
router_id LVS_DEVEL
}
vrrp_script chk_maintaince_down {
script "[[ -f /etc/keepalived/down ]] && exit 1 || exit 0"
interval 1
weight 2
}
vrrp_script chk_haproxy {
script "killall -0 haproxy"
interval 1
weight 2
}
vrrp_instance VI_1 {
interface eth0
state MASTER
priority 100
virtual_router_id 125
garp_master_delay 1
authentication {
auth_type PASS
auth_pass 1e3459f77aba4ded
}
track_interface {
eth0
}
virtual_ipaddress {
172.16.25.10/16 dev eth0 label eth0:0
}
track_script {
chk_haproxy
}
notify_master "/etc/keepalived/notify.sh master 172.16.25.10"
notify_backup "/etc/keepalived/notify.sh backup 172.16.25.10"
notify_fault "/etc/keepalived/notify.sh fault 172.16.25.10"
}
vrrp_instance VI_2 {
interface eth0
state BACKUP
priority 99
virtual_router_id 126
garp_master_delay 1
authentication {
auth_type PASS
auth_pass 7615c4b7f518cede
}
track_interface {
eth0
}
virtual_ipaddress {
172.16.25.11/16 dev eth0 label eth0:1
}
track_script {
chk_haproxy
chk_maintaince_down
}
notify_master "/etc/keepalived/notify.sh master 172.16.25.11"
notify_backup "/etc/keepalived/notify.sh backup 172.16.25.11"
notify_fault "/etc/keepalived/notify.sh fault 172.16.25.11"
}
# 172.16.25.110
# vi /etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {
notification_email {
root@localhost
}
notification_email_from admin@lnmmp.com
smtp_connect_timeout 3
smtp_server 127.0.0.1
router_id LVS_DEVEL
}
vrrp_script chk_maintaince_down {
script "[[ -f /etc/keepalived/down ]] && exit 1 || exit 0"
interval 1
weight 2
}
vrrp_script chk_haproxy {
script "killall -0 haproxy"
interval 1
weight 2
}
vrrp_instance VI_1 {
interface eth0
state BACKUP
priority 99
virtual_router_id 125
garp_master_delay 1
authentication {
auth_type PASS
auth_pass 1e3459f77aba4ded
}
track_interface {
eth0
}
virtual_ipaddress {
172.16.25.10/16 dev eth0 label eth0:0
}
track_script {
chk_haproxy
chk_maintaince_down
}
notify_master "/etc/keepalived/notify.sh master 172.16.25.10"
notify_backup "/etc/keepalived/notify.sh backup 172.16.25.10"
notify_fault "/etc/keepalived/notify.sh fault 172.16.25.10"
}
vrrp_instance VI_2 {
interface eth0
state MASTER
priority 100
virtual_router_id 126
garp_master_delay 1
authentication {
auth_type PASS
auth_pass 7615c4b7f518cede
}
track_interface {
eth0
}
virtual_ipaddress {
172.16.25.11/16 dev eth0 label eth0:1
}
track_script {
chk_haproxy
}
notify_master "/etc/keepalived/notify.sh master 172.16.25.11"
notify_backup "/etc/keepalived/notify.sh backup 172.16.25.11"
notify_fault "/etc/keepalived/notify.sh fault 172.16.25.11"
}
# vi /etc/keepalived/notify.sh
#!/bin/bash
# Author: Jason.Yu
# description: An example of notify script
#
contact='root@localhost'
notify() {
mailsubject="`hostname` to be $1: $2 floating"
mailbody="`date '+%F %H:%M:%S'`: vrrp transition, `hostname` changed to be $1"
echo $mailbody | mail -s "$mailsubject" $contact
}
case "$1" in
master)
notify master $2
/etc/rc.d/init.d/haproxy restart
exit 0
;;
backup)
notify backup $2 # 在节点切换成backup状态时，无需刻意停止haproxy服务，防止chk_maintaince和chk_haproxy多次对haproxy服务操作；
exit 0
;;
fault)
notify fault $2 # 同上
exit 0
;;
*)
echo 'Usage: `basename $0` {master|backup|fault}'
exit 1
;;
esac
页:
[1]