Shulou(Shulou.com)06/01 Report--

LVS/DR configuration

Prepare 3 machines:

Dir (192.168.220.141)

Rs1 (192.168. 220.143)

Rs2 (192.168.220.144)

Vip (192.168.220.110)

Vim / usr/local/sbin/lvs_dr.sh / / added on Director

#! / bin/bash

Echo 1 > / proc/sys/net/ipv4/ip_forward

Ipv=/sbin/ipvsadm

Vip=192.168.220.110

Rs1=192.168.220.143

Rs2=192.168.220.144

Ifconfig eth0:0$ vip broadcast $vip netmask 255.255.255.255 up

Route add-host $vip dev eth0:0

$ipv-C

$ipv-A-t $vip:80-s rr

$ipv-a-t $vip:80-r $rs1:80-g-w 1

$ipv-a-t $vip:80-r $rs2:80-g-w 1

On two rs: vim / usr/local/sbin/lvs_dr_rs.sh

#! / bin/bash

Vip=192.168.220.110

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

Then execute on director: bash / usr/local/sbin/lvs_dr.sh

Execute on two rs: bash / usr/local/sbin/lvs_dr_rs.sh

Browser test access under Windows

Combined with keepalived

Prepare another machine as a backup dir (192.168.220.129)

On the main dir

Vim / etc/keepalived/keepalived.conf

Vrrp_instance VI_1 {

State MASTER # BACKUP on the standby server

Interface eth0

Virtual_router_id 51

90 on priority 100 # standby server

Advert_int 1

Authentication {

Auth_type PASS

Auth_pass 1111

}

Virtual_ipaddress {

192.168.220.110

}

}

Virtual_server 192.168.220.110 80 {

Delay_loop 6 # (query realserver status every 10 seconds)

Lb_algo wlc # (lvs algorithm)

Lb_kind DR # (Direct Route)

Persistence_timeout 60 # (connections to the same IP are assigned to the same realserver within 60 seconds)

Protocol TCP # (check realserver status with TCP protocol)

Real_server 192.168.220.143 80 {

Weight 100 # (weight)

TCP_CHECK {

Connect_timeout 10 # (10 seconds no response timeout)

Nb_get_retry 3

Delay_before_retry 3

Connect_port 80

}

}

Real_server 192.168.220.144 80 {

Weight 100

TCP_CHECK {

Connect_timeout 10

Nb_get_retry 3

Delay_before_retry 3

Connect_port 80

}

}

}

Scp / etc/keepalived/keepalived.conf 192.168.220.129://etc/keepalived/keepalived.conf

On standby dir

Vim / etc/keepalived/keepalived.conf

Modify the following:

State MASTER-> state BACKUP

Priority 100-> priority 90

After configuring keepalived, you need to enable port forwarding (both master and slave):

Echo 1 > / proc/sys/net/ipv4/ip_forward

Then, execute the / usr/local/sbin/lvs_dr_rs.sh script on both rs

Finally, start the keepalived service (master then slave) on the two director:

/ etc/init.d/keepalived start

In addition, it is important to note that starting the keepalived service automatically generates vip and ipvsadm rules, eliminating the need to execute the / usr/local/sbin/lvs_dr.sh script mentioned above.

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