Lvs-dr+keepalived website Server dual-machine hot standby configuration

Keepalived is a software similar to the Layer3, 4 & 7 switch, which is what we normally call the 3rd, 4th, and 7th layers of exchange. The keepalived is auto-completed and does not require manual intervention.
Dispatch server:
It needs to be done on the basis of LVS.
Refer to the previous two sections:
One of the load Balancing clusters lvs-dr:http://blog.51cto.com/13572519/2084197
-lvs-nat:http://blog.51cto.com/13572519/2084181 of load Balancing cluster

A network card:
vmnet1:192.168.80.100
Master and Slave Scheduler do the following 3 steps: Load, install IPVSADM package
: http://www.keepalived.org/download.html
[Email protected] ~]# modprobe Ip_vs
[Email protected] ~]# rpm-ivh/mnt/packages/ipvsadm-1.27-7.el7.x86_64.rpm
---------keepalived Installation configuration (master, slave configuration)----
[Email protected] ~]# yum-y install popt-devel kernel-devel openssl-devel
WinSCP uploading keepalived to master server

[Email protected] ~]# tar FX keepalived-1.4.2.tar.gz-c/opt
[Email protected] opt]# cd/opt/keepalived-1.4.2/
[[email protected] keepalived-1.4.2]# yum-y install \
GCC \
gcc-c++ \
Make
[Email protected] keepalived-1.4.2]#/configure--prefix=/
[[email protected] keepalived-1.4.2]# make && make install
[Email protected] keepalived]# cp-r/opt/keepalived-1.4.2/keepalived/etc/keepalived//ETC/INIT.D
[Email protected] keepalived]# Systemctl enable keepalived
--------------------------------Modify the configuration file (main scheduler)-------------
[Email protected] keepalived]# vi/etc/keepalived/keepalived.conf
! Configuration File for Keepalived
Global_defs {
Notification_email {br/>[email protected]
[Email protected]Br/>[email protected]
Notification_email_from[email protected]
Smtp_server 192.168.200.1
Smtp_connect_timeout 30
router_id lvs_01
}

Vrrp_instance Vi_1 {
State MASTER
Interface Ens33
VIRTUAL_ROUTER_ID 51
Priority 110
Advert_int 1
Authentication {
Auth_type PASS
Auth_pass 6666
}
virtual_ipaddress {
192.168.80.188
}
}
Virtual_server 192.168.80.188 80 {
Delay_loop 6
Lb_algo RR
Lb_kind DR
Persistence_timeout 60
Protocol TCP
Real_server 192.168.80.101 80 {
Weight 1
Tcp_check {
Connect_port 80
Connect_timeout 3
Nb_get_retry 3
Delay_before_retry 3
}
}
Real_server 192.168.80.102 80 {
Weight 1
Tcp_check {
Connect_port 80
Connect_timeout 3
Nb_get_retry 3
Delay_before_retry 3
}
}
}
[[email protected]keepalived]# Service keepalived Start
[[email protected]keepalived]# IP addr Show Dev ens33//Verify that the virtual address is bound
inet 192.168.80.188/32 Scope Global ENS33
[[email protected]keepalived]# ipvsadm-l
[[email protected]keepalived]# tail-f/var/log/messages//Shutdown Verification for Business Server and main scheduler hot standby and Health check effect.
Master State represents the primary server
Backup state stands for standby server

---------------------------------Modify the configuration file (from the scheduler)-----------------
[[email protected]~]# modprobe Ip_vs
[[email protected]~]# rpm-ivh/mnt/packages/ipvsadm-1.27-7.el7.x86_64.rpm
[[email protected]~]# yum-y install \
GCC \
gcc-c++ \
Make
[[email protected]~]# Tar FX keepalived-1.4.2.tar.gz-c/opt
[[email protected]~]# cd/opt/keepalived-1.4.2/
[[email protected]keepalived-1.4.2]#./configure--prefix=/
[[email protected]keepalived-1.4.2]# make && make install
[[email protected]keepalived-1.4.2]# Cp-r keepalived/etc/init.d/keepalived/etc/init.d/
[[email protected]keepalived-1.4.2]# Systemctl Enable keepalived
[[email protected]keepalived-1.4.2]# vi/etc/keepalived/keepalived.conf
! Configuration File for Keepalived

Global_defs {
Notification_email {
[email protected]
}
Notification_email_from benet [email protected]
Smtp_server 127.0.0.1
Smtp_connect_timeout 30
router_id lvs_02//Master or slave is not the same
}

Vrrp_instance Vi_1 {
State BACKUP//hot standby from Scheduler
Interface Ens33
VIRTUAL_ROUTER_ID 51//Number Master is the same as from both sides.
Priority 105//precedence from Scheduler
Advert_int 1
Authentication {//master, from hot standby authentication information
Auth_type PASS
Auth_pass 6666
}
virtual_ipaddress {//Specifies the cluster VIP address (virtual server address), you can specify multiple
192.168.80.188
}
}

Virtual_server 192.168.80.188 80 {//Virtual server address (VIP), Port
Delay_loop 6//Health check interval (seconds) is normal.
Lb_algo RR//polling (RR) scheduling algorithm
Lb_kind dr//Direct Routing (DR) cluster operating mode
Persistence_timeout 60//Connection hold time, (seconds), if commented out add a "!" At this time, the same client's request is handled by the same server
protocol TCP//application service is using the TCP protocol

Real_server 192.168.80.101 80 {//First Web node address, port
Weight 1///node weight
Tcp_check {//Health check
Connect_port 80//Check for Destination Port
Connect_timeout 3//Connection timeout (seconds)
Nb_get_retry 3//retry attempts
Delay_before_retry 3//retry interval (seconds)
}
}
Real_ Server 192.168.80.102 80 {//second Web node address, port
Weight 1
Tcp_check {
Connect_port
Connect_timeout 3
Nb_ Get_retry 3
Delay_before_retry 3
}
}
}
[ [email protected] keepalived-1.4.2 ]# service keepalived start
[[email  Protected] keepalived-1.4.2]# IP addr Show dev ens33
[[email protected] keepalived-1.4.2]# tail-f/var/log/messages
MASTER State represents the primary server
Backup state represents the standby server

Here is the Web server:
192.168.80.101 Server:
[email protected] ~]# yum install-y httpd
[email protected] ~]# vi/etc/httpd/conf/httpd.confservername www.aa.com
[email protected] ~]# vi/var/www/html/index.html

192.168.80.102 Server:
[email protected] ~]# yum install-y httpd
[email protected] ~]# vi/etc/httpd/conf/httpd.conf
ServerName www.bb.com
[email protected] ~]# vi/var/www/html/index.html

Lvs-dr+keepalived Web server dual-machine hot standby configuration