KEEPALIVED的具体实现
具体过程是用Nginx做负载均衡，可以将Nginx和主机放在同一台机子上，也可以分开放置，只不过分开的话要指明RS是Nginx的主机地址。至于直接将虚拟地址配置在Nginx主机上我暂时还未成功下面附上我的双主模型的主keepalived服务器的配置
! Configuration File for keepalived
global_defs {
notification_email {
root@localhost
vrrp_mcast_group4224.0.11.100
}
notification_email_from kaadmin@localhost
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id sjf1
}
vrrp_scriptchk_mantaince{
script "[[-e /etc/keepalived/down]]&& exit 1 || exit 0"
interval 1
weight-4 }
vrrp_instance VI_1 {
state MASTER
interface eth1
virtual_router_id 15
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass 11111234
}
virtual_ipaddress { 11.1.0.11/16 dev eth1
}
track_script {
chk_mantaince
}
notify_master "/etc/keepalived/inotify.shmaster"
notify_backup "/etc/keepalived/inotify.shbackup"
notify_fault "/etc/keepalived/inotify.shfault"}
virtual_server 11.1.0.11 80 {
delay_loop 6
lb_algo rr
lb_kind DR#persistence_timeout 50
protocol TCP
sorry_server 11.1.0.20180
real_server 11.1.0.20380 {
weight 1
HTTP_GET {
url {
path /
status_code 200
}
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
}
}
real_server 11.1.0.20480 {
weight 1
HTTP_GET {
url {
path /
status_code 200
}
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
}
}
}
vrrp_instance VI_2 {
state BACKUP
interface eth1
virtual_router_id 16
priority 97
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress { 11.1.0.22/16 dev eth1
}
track_script {
chk_mantaince
}
notify_master "/etc/keepalived/inotify.shmaster"
notify_backup "/etc/keepalived/inotify.shbackup"
notify_fault "/etc/keepalived/inotify.shfault"}
virtual_server 11.1.0.22 80 {
delay_loop 6
lb_algo rr
lb_kind DR#persistence_timeout 50
protocol TCP
sorry_server 11.1.0.20180
real_server 11.1.0.20580 {
weight 1
HTTP_GET {
url {
path /
status_code 200
}
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
}
}
real_server 11.1.0.20680 {
weight 1
HTTP_GET {
url {
path /
status_code 200
}
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
}
}
}下面附上我的从keepalived的配置
! Configuration File for keepalived
global_defs {
notification_email {
root@localhost
vrrp_mcast_group4224.0.11.100
}
notification_email_from kaadmin@localhost
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id sjf2
}
vrrp_scriptchk_mantaince{
script "[[-e /etc/keepalived/down]]&& exit 1 || exit 0"
interval 1
weight-4 }
vrrp_instance VI_1 {
state BACKUP
interface eth1
virtual_router_id 15
priority 98
advert_int 1
authentication {
auth_type PASS
auth_pass 11111234
}
virtual_ipaddress { 11.1.0.11/16 dev eth1
}
track_script {
chk_mantaince
}
notify_master "/etc/keepalived/inotify.shmaster"
notify_backup "/etc/keepalived/inotify.shbackup"
notify_fault "/etc/keepalived/inotify.shfault"}
virtual_server 11.1.0.11 80 {
delay_loop 6
lb_algo rr
lb_kind DR#persistence_timeout 50
protocol TCP
sorry_server 11.1.0.20180
real_server 11.1.0.20380 {
weight 1
HTTP_GET {
url {
path /
status_code 200
}
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
}
}
real_server 11.1.0.20480 {
weight 1
HTTP_GET {
url {
path /
status_code 200
}
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
}
}
}
vrrp_instance VI_2 {
state MASTER
interface eth1
virtual_router_id 16
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress { 11.1.0.22/16 dev eth1
}
track_script {
chk_mantaince
}
notify_master "/etc/keepalived/inotify.shmaster"
notify_backup "/etc/keepalived/inotify.shbackup"
notify_fault "/etc/keepalived/inotify.shfault"}
virtual_server 11.1.0.22 80 {
delay_loop 6
lb_algo rr
lb_kind DR#persistence_timeout 50
protocol TCP
sorry_server 11.1.0.20180
real_server 11.1.0.20580 {
weight 1
HTTP_GET {
url {
path /
status_code 200
}
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
}
}
real_server 11.1.0.20680 {
weight 1
HTTP_GET {
url {
path /
status_code 200
}
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
}
}
}下面在附上我的设置虚拟网络的脚本
#!/bin/bashvip='11.1.0.11'vport='80'netmask='255.255.255.255'iface='lo:0'case $1 instart) echo 1 > /proc/sys/net/ipv4/conf/all/arp_ignore echo 1 > /proc/sys/net/ipv4/conf/lo/arp_ignore echo 2 > /proc/sys/net/ipv4/conf/all/arp_announce echo 2 > /proc/sys/net/ipv4/conf/lo/arp_announce
ifconfig $iface$vipnetmask $netmaskbroadcast $vip up
route add -host $vip dev $iface
;;
stop)
ifconfig $iface down echo 0 > /proc/sys/net/ipv4/conf/all/arp_ignore
echo 0 > /proc/sys/net/ipv4/conf/lo/arp_ignore
echo 0 > /proc/sys/net/ipv4/conf/all/arp_announce
echo 0 > /proc/sys/net/ipv4/conf/lo/arp_announce
esac下面附上我的跟踪脚本
#!/bin/bash#auth sjf#date 2016.11.1vip=192.16.11.99contact='root@localhost'notify() {
mailsubject="`hostname` to be $1 ;@vip floating "
mailbody="`date +'%F %H:%M%S'`;vrrp transited , `hostname ` changed to be $1 "
echo $mailbody | mail -s "$mailsubject"$contact}case "$1" inmaster)
notify master exit 0
;;
backup)
notifybackup exit 0
;;
fault)
notify fault exit 0
;;
*) echo 'Usage: `basename $0` {maser|backup|fault} '
exit 1esac
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