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示例：
! Configuration File
for
keepalived
global_defs {
notification_email {
example@163.com
}
notification_email_from example@example.com
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id MYSQL_HA
}
vrrp_instance VI_1 {
state BACKUP
interface eth1
virtual_router_id 50
nopreempt
#当主down时，备接管，主恢复，不自动接管
priority 100
advert_int 1
authentication {
auth_type PASS
ahth_pass 123
}
virtual_ipaddress {
192.168.1.200
#虚拟IP地址
}
}
virtual_server 192.168.1.200 3306 {
delay_loop 6
# lb_algo rr
# lb_kind NAT
persistence_timeout 50
protocol TCP
real_server 192.168.1.201 3306 {
#监控本机3306端口
weight 1
notify_down
/etc/keepalived/kill_keepalived
.sh
#检测3306端口为down状态就执行此脚本（只有keepalived关闭，VIP才漂移 ）
TCP_CHECK {
#健康状态检测方式，可针对业务需求调整（TTP_GET|SSL_GET|TCP_CHECK|SMTP_CHECK|MISC_CHECK）
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
}
}
}
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示例：
! Configuration File
for
keepalived
global_defs {
notification_email {
example@163.com
}
notification_email_from example@example.com
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id MYSQL_HA
}
vrrp_script check_nginx {
script
/etc/keepalived/check_nginx
.sh
#检测脚本
interval 2
#执行间隔时间
}
vrrp_instance VI_1 {
state BACKUP
interface eth1
virtual_router_id 50
nopreempt
#当主down时，备接管，主恢复，不自动接管
priority 100
advert_int 1
authentication {
auth_type PASS
ahth_pass 123
}
virtual_ipaddress {
192.168.1.200
#虚拟IP地址
}
track_script {
#在实例中引用脚本
check_nginx
}
}
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脚本内容如下：
# cat /etc/keepalived/check_nginx.sh
Count1=`
netstat
-antp |
grep
-
v
grep
|
grep
nginx |
wc
-l`
if
[ $Count1 -
eq
0 ];
then
/usr/local/nginx/sbin/nginx
sleep
2
Count2=`
netstat
-antp |
grep
-
v
grep
|
grep
nginx |
wc
-l`
if
[ $Count2 -
eq
0 ];
then
service keepalived stop
else
exit
0
fi
else
exit
0
fi
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HTTP_GET或SSL_GET {
url {
path
/index
.html
#检测url，可写多个
digest 24326582a86bee478bac72d5af25089e
#检测效验码
#digest效验码获取方法：genhash -s IP -p 80 -u http://IP/index.html
status_code 200
#检测返回http状态码
}
connect_port 80
#连接端口
connect_timeout 3
#连接超时时间
nb_get_retry 3
#重试次数
delay_before_retry 2
#连接间隔时间
}
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TCP_CHECK {
connect_port 80
#健康检测端口，默认为real_server后跟端口
connect_timeout 5
nb_get_retry 3
delay_before_retry 3
}
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SMTP_CHECK {
#健康检测邮件服务器smtp
host {
connect_ip
connect_port
}
connect_timeout 5
retry 2
delay_before_retry 3
hello_name
"mail.domain.com"
}
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MISC_CHECK {
misc_path
/script
.sh
#指定外部程序或脚本位置
misc_timeout 3
#执行脚本超时时间
!misc_dynamic
#不动态调整服务器权重（weight），如果启用将通过退出状态码动态调整real_server权重值
}
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主配置默认邮件通知配置模板如下：
global_defs
# Block id
{
notification_email
# To:
{
admin@example1.com
...
}
# From: from address that will be in header
notification_email_from admin@example.com
smtp_server 127.0.0.1
# IP
smtp_connect_timeout 30
# integer, seconds
router_id my_hostname
# string identifying the machine,
# (doesn't have to be hostname).
enable_traps
# enable SNMP traps
}
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示例：
! Configuration File
for
keepalived
global_defs {
notification_email {
example@163.com
}
notification_email_from example@example.com
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id MYSQL_HA
}
vrrp_instance VI_1 {
state BACKUP
interface eth1
virtual_router_id 50
nopreempt
#当主down时，备接管，主恢复，不自动接管
priority 100
advert_int 1
authentication {
auth_type PASS
ahth_pass 123
}
virtual_ipaddress {
192.168.1.200
}
notify_master
/etc/keepalived/to_master
.sh
notify_backup
/etc/keepalived/to_backup
.sh
notify_fault
/etc/keepalived/to_fault
.sh
}
virtual_server 192.168.1.200 3306 {
delay_loop 6
persistence_timeout 50
protocol TCP
real_server 192.168.1.201 3306 {
weight 1
notify_up
/etc/keepalived/mysql_up
.sh
notify_down
/etc/keepalived/mysql_down
.sh
TCP_CHECK {
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
}
}
}
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# cat to_master.sh
#!/bin/bash
Date=$(
date
+%F
" "
%T)
IP=$(
ifconfig
eth0 |
grep
"inet addr"
|
cut
-d
":"
-f2 |
awk
'{print $1}'
)
Mail=
"baojingtongzhi@163.com"
echo
"$Date $IP change to master."
|mail -s
"Master-Backup Change Status"
$Mail
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# cat to_backup.sh
#!/bin/bash
Date=$(
date
+%F
" "
%T)
IP=$(
ifconfig
eth0 |
grep
"inet addr"
|
cut
-d
":"
-f2 |
awk
'{print $1}'
)
Mail=
"baojingtongzhi@163.com"
echo
"$Date $IP change to backup."
|mail -s
"Master-Backup Change Status"
$Mail
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# cat to_fault.sh
#!/bin/bash
Date=$(
date
+%F
" "
%T)
IP=$(
ifconfig
eth0 |
grep
"inet addr"
|
cut
-d
":"
-f2 |
awk
'{print $1}'
)
Mail=
"baojingtongzhi@163.com"
echo
"$Date $IP change to fault."
|mail -s
"Master-Backup Change Status"
$Mail
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# cat mysql_down.sh
#!/bin/bash
Date=$(
date
+%F
" "
%T)
IP=$(
ifconfig
eth0 |
grep
"inet addr"
|
cut
-d
":"
-f2 |
awk
'{print $1}'
)
Mail=
"baojingtongzhi@163.com"
pkill keepalived
echo
"$Date $IP The mysql service failure,kill keepalived."
|mail -s
"Master-Backup MySQL Monitor"
$Mail
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# cat mysql_up.sh
#!/bin/bash
Date=$(
date
+%F
" "
%T)
IP=$(
ifconfig
eth0 |
grep
"inet addr"
|
cut
-d
":"
-f2 |
awk
'{print $1}'
)
Mail=
"baojingtongzhi@163.com"
echo
"$Date $IP The mysql service is recovery."
|mail -s
"Master-Backup MySQL Monitor"
$Mail
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