keepalived实现高可用负载均衡DR模式
#################################################################keepalived master eth0: 192.168.108.18
keepalived slave eth0: 192.168.108.19
real server 1 eth0: 192.168.108.10
real server 1 eth0: 192.168.108.21
vip: 192.168.108.17
real server 1 & 2: 安装nginx 开启80端口
test server eth0: 192.168.108.25
#################################################################
##################### keepalived master ##########################
global_defs {
notification_email {
****@****.com
}
notification_email_from keepalived@localhost.com
smtp_server ********
smtp_connect_timeout 30
router_id LVS_DEVEL
}
vrrp_instance VI_1 {
state BACKUP
nopreempt
interface eth0
virtual_router_id 51
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.108.17
}
}
virtual_server 192.168.108.17 80 {
delay_loop 6
lb_algo wrr
lb_kind DR
persistence_timeout 0
protocol TCP
real_server 192.168.108.10 80 {
weight 100
TCP_CHECK {
connect_timeout 10
nb_get_retry 3
delay_before_retry 3
connect_port 80
}
}
real_server 192.168.108.21 80 {
weight 100
TCP_CHECK {
connect_timeout 10
nb_get_retry 3
delay_before_retry 3
connect_port 80
}
}
}
##################### keepalived master ##########################
##################### keepalived slave ##########################
global_defs {
notification_email {
****@****.com
}
notification_email_from keepalived@localhost.com
smtp_server ********
smtp_connect_timeout 30
router_id LVS_DEVEL
}
vrrp_instance VI_1 {
state BACKUP
interface eth0
virtual_router_id 51
priority 99
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.108.17
}
}
virtual_server 192.168.108.17 80 {
delay_loop 6
lb_algo wrr
lb_kind DR
persistence_timeout 0
protocol TCP
real_server 192.168.108.10 80 {
weight 100
TCP_CHECK {
connect_timeout 10
nb_get_retry 3
delay_before_retry 3
connect_port 80
}
}
real_server 192.168.108.21 80 {
weight 100
TCP_CHECK {
connect_timeout 10
nb_get_retry 3
delay_before_retry 3
connect_port 80
}
}
}
##################### keepalived slave ##########################
###################### real server 1 & 2 ########################
#!/bin/bash
#/usr/local/sbin/lvs_rs.sh
vip=192.168.108.17
ifconfig lo:0 $vip broadcast $vip netmask 255.255.255.255 up
route add -host $vip lo:0
echo "1" > /proc/sys/net/ipv4/conf/lo/arp_ignore
echo "2" > /proc/sys/net/ipv4/conf/lo/arp_announce
echo "1" > /proc/sys/net/ipv4/conf/all/arp_ignore
echo "2" > /proc/sys/net/ipv4/conf/all/arp_announce
###################### real server 1 & 2 ########################
################## real server 1 & 2 setting###################
ifconfig lo:0 down
systemctl start nginx
sh /usr/local/sbin/lvs_dr.sh
################## real server 1 & 2 setting###################
################## keepalived master & slave setting###########
#服务器上开启路由转发功能：
echo 1 > /proc/sys/net/ipv4/ip_forward
ipvsadm -C
systemctl start keepalived
################## keepalived master & slave setting###########
######################## test server###########################
curl 192.168.108.17
#分别关闭重启 keepalived master & salve 的keepalvied
systemctl stop keepalvide
systemctl restart keepalvide
#分别关闭 real server 1 & 2 nginx
systemctl stop nginx
######################## test server###########################
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