keepalived configuration of HA based on LVS Dr model

The basic architecture diagram is as follows:

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Platform Environment: centos6.x
1. Install the keepalived, install the Ipvsadm
Yum–y Install keepalived Ipvsadm

2. Configure the Service
2.1 LVs realserver Configuration Script
#!/bin/bash
vip1=192.168.1.199
Case "$" in
Start
echo "Start LVS of Realserver"
/sbin/ifconfig lo:0 $VIP 1 broadcast $VIP 1 netmask 255.255.255.255 up
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
;;
Stop
/sbin/ifconfig lo:0 Down
echo "Close LVS directorserver"
echo "0" >/proc/sys/net/ipv4/conf/lo/arp_ignore
echo "0" >/proc/sys/net/ipv4/conf/lo/arp_announce
echo "0" >/proc/sys/net/ipv4/conf/all/arp_ignore
echo "0" >/proc/sys/net/ipv4/conf/all/arp_announce
;;
*)
echo "Usage: $ {start|stop}"
Exit 1
Esac

2.2 Keepalived Master configuration file
! Configuration File for Keepalived

Global_defs {
Notification_email {
[Email protected]
}
Notification_email_from [email protected]
Smtp_server 127.0.0.1
Smtp_connect_timeout 30
router_id Lvs_devel
}

Vrrp_instance Vi_1 {
State MASTER
Interface eth0
VIRTUAL_ROUTER_ID 52
Priority 100
Advert_int 1
Authentication {
Auth_type PASS
Auth_pass 1111
}
virtual_ipaddress {
192.168.1.199
}
Notify_master "/etc/keepalived/notify.sh Master"
Notify_backup "/etc/keepalived/notify.sh Backup"
Notify_fault "/etc/keepalived/notify.sh Fault"
}

Virtual_server 192.168.1.199 80 {
Delay_loop 6
Lb_algo RR
Lb_kind DR
Nat_mask 255.255.255.0
Persistence_timeout 50
Protocol TCP

Real_server 192.168.1.204 80 {
Weight 1
Http_get {
URL {
Path http://192.168.1.204/index.html
Status_code 200
}
Connect_timeout 3
Nb_get_retry 3
Delay_before_retry 3
}
}

Real_server 192.168.1.205 80 {
Weight 1
Http_get {
URL {
Path http://192.168.1.205/index.html
Status_code 200
}
Connect_timeout 3
Nb_get_retry 3
Delay_before_retry 3

}
}
}


2.3 Keepalived Backup configuration file
! Configuration File for Keepalived

Global_defs {
Notification_email {
[Email protected]
}
Notification_email_from [email protected]
Smtp_server 127.0.0.1
Smtp_connect_timeout 30
router_id Lvs_devel
}

Vrrp_instance Vi_1 {
State BACKUP
Interface eth0
VIRTUAL_ROUTER_ID 52
Priority 99
Advert_int 1
Authentication {
Auth_type PASS
Auth_pass 1111
}
virtual_ipaddress {
192.168.1.199
}
Notify_master "/etc/keepalived/notify.sh Master"
Notify_backup "/etc/keepalived/notify.sh Backup"
Notify_fault "/etc/keepalived/notify.sh Fault"
}

Virtual_server 192.168.1.199 80 {
Delay_loop 6
Lb_algo RR
Lb_kind DR
Nat_mask 255.255.255.0
Persistence_timeout 50
Protocol TCP

Real_server 192.168.1.204 80 {
Weight 1
Http_get {
URL {
Path http://192.168.1.204/index.html
Status_code 200
}
Connect_timeout 3
Nb_get_retry 3
Delay_before_retry 3
}
}

Real_server 192.168.1.205 80 {
Weight 1
Http_get {
URL {
Path http://192.168.1.205/index.html
Status_code 200
}
Connect_timeout 3
Nb_get_retry 3
Delay_before_retry 3

}
}
}

3. Testing

Start the service and view the Ipvs rule status on Master

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Maill command to view messages

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down master to see If Backup can take over successfully

View whether the state is converted

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See if the Ipvs rule is in effect

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See if VIP transfers

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This article is from the "left-handed" blog, make sure to keep this source http://mofeihu.blog.51cto.com/1825994/1720089

keepalived configuration of HA based on LVS Dr model