LVS keepalived 高可用负载均衡
- 环境
|
IP |
HOSTNAME |
Describe |
|
192.168.100.30 |
lvs01 |
主负载 |
|
192.168.100.31 |
lvs02 |
备负载 |
|
192.168.100.40 |
|
VIP |
|
192.168.100.29 |
node01 |
节点 |
|
192.168.100.28 |
node02 |
节点 |
|
192.168.100.27 |
node03 |
节点 |
- 安装
yum -y install ipvsadm keepalived
- 主负载配置
! Configuration File for keepalived
global_defs {
notification_email {
}
notification_email_from [email protected]
smtp_server 192.168.200.1
smtp_connect_timeout 30
router_id LVS_DEVEL
vrrp_skip_check_adv_addr
vrrp_strict
vrrp_garp_interval 0
vrrp_gna_interval 0
}
vrrp_instance VI_1 {
state MASTER
interface eth0
virtual_router_id 51
priority 150
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.100.40/24 dev eth0 label eth0:0
}
}
virtual_server 192.168.100.40 3306 {
delay_loop 6
lb_algo rr
lb_kind DR
persistence_timeout 50
protocol TCP
real_server 192.168.100.27 3306 {
weight 1
MISC_CHECK {
misc_path "/etc/keepalived/check.sh 192.168.100.27"
misc_dynamic
}
}
real_server 192.168.100.28 3306 {
weight 1
MISC_CHECK {
misc_path "/etc/keepalived/check.sh 192.168.100.28"
misc_dynamic
}
}
real_server 192.168.100.29 3306 {
weight 1
MISC_CHECK {
misc_path "/etc/keepalived/check.sh 192.168.100.29"
misc_dynamic
}
}
}
- 备负载配置
! Configuration File for keepalived
global_defs {
notification_email {
}
notification_email_from [email protected]
smtp_server 192.168.200.1
smtp_connect_timeout 30
router_id LVS_DEVEL_BACKUP
vrrp_skip_check_adv_addr
vrrp_strict
vrrp_garp_interval 0
vrrp_gna_interval 0
}
vrrp_instance VI_1 {
state BACKUP
interface eth0
virtual_router_id 51
priority 50
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.100.40/24 dev eth0 label eth0:0
}
}
virtual_server 192.168.100.40 3306 {
delay_loop 6
lb_algo rr
lb_kind DR
persistence_timeout 50
protocol TCP
real_server 192.168.100.27 3306 {
weight 1
MISC_CHECK {
misc_path "/etc/keepalived/check.sh 192.168.100.27"
misc_dynamic
}
}
real_server 192.168.100.28 3306 {
weight 1
MISC_CHECK {
misc_path "/etc/keepalived/check.sh 192.168.100.28"
misc_dynamic
}
}
real_server 192.168.100.29 3306 {
weight 1
MISC_CHECK {
misc_path "/etc/keepalived/check.sh 192.168.100.29"
misc_dynamic
}
}
}
/etc/keepalived/check.sh
#!/bin/bash
mysql -uwsrep -p123456 -h$1 -e "select 1;" &>/dev/null
ret=$?
if [ $ret -eq 0 ];then
exit 0
else
exit 1
fi
- 启动服务
/etc/init.d/keepalived start
/etc/init.d/ipvsadm start
- 测试
关闭主负载keepalived，VIP漂移到备负载
/etc/init.d/keepalived stop
启动主负载keepalived，VIP漂移回来
/etc/init.d/keepalived start