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This article mainly introduces "how to achieve Keepalive+lvs master-slave dr load balancing in LINUX". In daily operation, I believe many people have doubts about how to achieve Keepalive+lvs master-slave dr load balancing in LINUX. The editor consulted all kinds of materials and sorted out simple and easy-to-use operation methods. I hope it will be helpful to answer the doubts about "how to achieve Keepalive+lvs master-slave dr load balancing in LINUX". Next, please follow the editor to study!

One. Master-slave keepalive + test machine 1.1Master keepalive

1.1.1 configuring a local yum source

# mkdir / media/cdrom / / create a cdrom directory

# mkdir / etc/yum.repo.d/a / / create a directory in the yum source directory

# mv / etc/yum.repo.d/Cent* / etc/yum.repo.d/a / / copy all files starting with Cent to the a directory

# mount / dev/cdrom / media/cdrom/ / Mount the CD to the / media/cdrom/ directory

# vim / etc/yum.repo.d/local.repo / / Edit the local yum source file

[base]

Name=cets

Baseurl= file:///media/cdrom

Enabled=1

Gpgcheck=0

1.1.2 install support for keepalive package

# yum-y install openssl-devel / / install openssl-devel software using yum source

# yum-y install popt-devel / / install popt-devel software using yum source

1.1.3 compile and install keepalive

# tar zxf keepalived-1.2.13.tar.gz / / decompress the keepalived package

# cd keepalived-1.2.13 / / enter the decompressed folder

#. / configure-prefix=/-- with-kernel-dir=/usr/src/kernels/2.6.32-431.el6.x86_64 / / compile to specify the installation path

# make & & make install / / compile and install keepalived

1.1.4 modify the configuration file and enable keepalive

Native ip 192.168.1.1

# cd / etc/keepalived/ enter the home directory of keepalived software

# cp keepalived.conf keepalived.conf.bak / / back up the keepalived main configuration file

# vim keepalived.conf / / Edit keepalived main configuration file

Router_id R1 / / name the keepalived host

State MASTER / / the keepalived host type is dominant

Priority 100 / / priority 100

Virtual_ipaddress {

192.168.1.254} / / Virtual ip address

# service keepalived restart / / restart the service

# service iptables stop / / turn off the firewall

# service network restart / / restart the Nic

1.2 install from keepalive1.2.1 native yum1.2.2 support keepalive package 1.2.3 compile install keepalive1.2.4 modify configuration file and enable keepalive

Native ip 192.168.1.5

Router_id r2

State SL**E remarks: you can also use BACKUP

Priority 99

Virtual_ipaddress {

192.168.1.254}

1.3 Test Machine 1.3.1 Test Machine

Ip address 192.168.1.110

Service iptables stop

Test login 192.168.1.25

1.3.2 main on / off service test

Turn off the firewall

Turn on httpd

Restart keepalive

Edit the test page # vim / var/www/html/index.html

192.168.1.1

Down drop the main service in the test machine when accessing 192.168.1.254

1.3.2 testing from enabling and shutting down services

Turn off the firewall

Turn on httpd

Restart keepalive

# ip addr show dev eth0 View Virtual APIs

Edit the test page # vim / var/www/html/index.html

192.168.1.5

II. Master-slave keepalive+ lvs + test

2.1 main keepalive2.1.1 configuration yum Source 2.1.2 install support Pack 2.1.3 compile and install keepalive2.1.4 modify configuration File

Router_id r1

State MASTER

Priority 100

Virtual_ipaddress {

192.168.1.254}

Virtual_server 192.168.1.254 80 {

Delay_loop 6

Lb_algo rr

Lb_kind DR

Nat_mask 255.255.255.0

Persistence_timeout 50

Protocol TCP

Real_server 192.168.1.11 80 {

Weight 1

TCP_CHECK {

Connect-port 80

Connect_timeout 3

Nb_get_retry 3

Delay_before_retry 3

}}

}

Virtual_server 192.168.1.254 80 {

Delay_loop 6

Lb_algo rr

Lb_kind DR

Nat_mask 255.255.255.0

Persistence_timeout 50

Protocol TCP

Real_server 192.168.1.22 80 {

Weight 1

TCP_CHECK {

Connect-port 80

Connect_timeout 3

Nb_get_retry 3

Delay_before_retry 3

}}

}

2.1.5 install ipvsadm test to see the effect 2.2 from keepalive

1. Local yum

two。 Install the support keepalive package

3. Compile and install keepalive

4. Modify the configuration file and enable keepalive

Copy backup cp keepalive.conf keepalive.conf.bak

Native ip 192.168.1.5

Router_id r2

State SL**E

Priority 99

Virtual_ipaddress {

192.168.1.254}

Virtual_server 192.168.1.254 80 {

Delay_loop 6

Lb_algo rr

Lb_kind DR

Nat_mask 255.255.255.0

Persistence_timeout 50

Protocol TCP

Real_server 192.168.1.11 80 {

Weight 1

TCP_CHECK {

Connect-port 80

Connect_timeout 3

Nb_get_retry 3

Delay_before_retry 3

}}

}

5. Install ipvsadm

Yum-y install ipvsadm

Ipvsadm-Lnc / Ln

2.3 Node Web12.3.1 modifies ip address

192.168.1.11

2.3.2 add lo:0

# cd / etc/sysconfig/network-scripts

# cp ifcfg-lo ifcfg-lo:0

# vim ifcfg-lo:0

DEVICE=lo:0

IPADDR=192.168.1.254

NETMASK=255.255.255.255

ONBOOT=yes

Restart the service service network restart

Add as appropriate

Vi / etc/rc.local / / add VIP local access route

/ sbin/route add-host 192.168.1.254 dev lo:0

# route add-host 192.168.1.254 dev lo:0

2.3.3 adjust the / proc parameter to disable the ARP response

Vim / etc/sysctl.conf

Net.ipv4.conf.all.arp_ignore = 1

Net.ipv4.conf.all.arp_announce = 2

Net.ipv4.conf.default.arp_ignore = 1

Net.ipv4.conf.default.arp_announce = 2

Net.ipv4.conf.lo.arp_ignore = 1

Net.ipv4.conf.lo.arp_announce = 2

Sysctl-p

2.3.4 restart the httpd service to create a test web page

Vi / var/www/html/index.html

192.168.1.11 color-test web page /

# service httpd start

# chkconfig httpd on

2.4 Node web22.4.1 modifies ip address

192.168.1.22

2.4.2 add lo:0

# cd / etc/sysconfig/network-scripts

# cp ifcfg-lo ifcfg-lo:0

# vim ifcfg-lo:0

DEVICE=lo:0

IPADDR=192.168.1.254

NETMASK=255.255.255.255

ONBOOT=yes

Restart the service service network restart

Add as appropriate

Vi / etc/rc.local / / add VIP local access route

/ sbin/route add-host 192.168.1.254 dev lo:0

# route add-host 192.168.1.254 dev lo:0

2.4.3 adjust the / proc parameter to disable the ARP response

Vim / etc/sysctl.conf

Net.ipv4.conf.all.arp_ignore = 1

Net.ipv4.conf.all.arp_announce = 2

Net.ipv4.conf.default.arp_ignore = 1

Net.ipv4.conf.default.arp_announce = 2

Net.ipv4.conf.lo.arp_ignore = 1

Net.ipv4.conf.lo.arp_announce = 2

Sysctl-p

2.4.4 restart the httpd service to create a test web page

Vi / var/www/html/index.html

192.168.1.22/

# service httpd start

# chkconfig httpd on

2.5 Test Machine 2.5.1 Test Master + lvs

Configure ip 192.168.1.110

Turn off the firewall to communicate with other hosts

Log in 192.168.1.254

Master ipvsadm-Ln

2.5.2 Test from + lvs

Down loses the primary keepalive

Landing

2.5.3 Test Node

Login success Node 1 down at Test Node 2

At this point, the study on "how to achieve Keepalive+lvs master-slave dr load balancing in LINUX" is over. I hope to be able to solve everyone's doubts. The collocation of theory and practice can better help you learn, go and try it! If you want to continue to learn more related knowledge, please continue to follow the website, the editor will continue to work hard to bring you more practical articles!

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