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

In this issue, the editor will bring you about LVS-DR cluster mode + keepalived how to achieve high availability, the article is rich in content and professional analysis and description for you, I hope you can get something after reading this article.

Conditions: five virtual machines:

(main) load scheduler:

Create a mapped port (VIP)

Optimize the environment: (/ etc/sysctl.conf)

Net.ipv4.conf.all.send_redirects = 0

Net.ipv4.conf.default.send_redirects = 0

Net.ipv4.conf.eth0.send_redirects = 0

Sysctl-p

Load ip_vs module

Modprobe ip_vs

View ipvs

Cat / proc/net/ip_vs

Install IPVS

Yum install-y ipvsadm

View the version:

Ipvsadm-v

Set load scheduler setting mode

Ipvsadm-A-t 192.168.115.100 ipvsadm 80-s rr

Ipvsadm-a-t 192.168.115.100 RS 80-r 192.168.115.173 80-g

Ipvsadm-a-t 192.168.115.100 purl 80-r 192.168.115.176 purl 80-g

View:

Ipvsadm-Ln

Install keepalived

Yum install-y gcc* kernel-devel openssl-devel popt-devel ipvsadm

Tar-xvf keepalived-1.2.7.tar.gz

. / configure-- prefix=/-- with-kernel-dir=/usr/src/kernels/2.6.32-131.0.15.el6.i686

Make & & make install

Chkconfig-add keepalived

Chkconfig keepalived on

Configure the keepalived file:

Start the service:

Service keepalived start

Chkconfig keepalived on

Shared Resource Server:

Set up NFS for RS to hang in use

RS1:

Install the Apache service

Configure local loopback port mapping:

Set up a route:

Route add-host 192.168.115.100 dev lo:0

Optimize the environment:

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

RS2:

Install the Apache service and hang the content from the NFS server:

Mount-t nfs 192.168.115.177:/share / var/www/html

Set up the mapping network card:

Optimize the environment:

Net.ipv4.conf.all.arp_ignore = 1

Net.ipv4.conf.all.arp_announce = 2

Net.ipv4.conf.default.arp_announce = 2

Net.ipv4.conf.default.arp_ignore = 1

Net.ipv4.conf.lo.arp_ignore = 1

Net.ipv4.conf.lo.arp_announce = 2

Set up routing:

Set up a route:

Route add-host 192.168.115.100 dev lo:0

Test machine access:

With each refresh, the content is polled:

The following is to build LVS-DR based on keepalived

Add a virtual machine as a slave load scheduler:

Load ip_vs module

Modprobe ip_vs

View ipvs

Cat / proc/net/ip_vs

Install IPVS

Yum install-y ipvsadm

View the version:

Ipvsadm-v

Set load scheduler setting mode

Ipvsadm-A-t 192.168.115.100 ipvsadm 80-s rr

Ipvsadm-a-t 192.168.115.100 RS 80-r 192.168.115.173 80-g

Ipvsadm-a-t 192.168.115.100 purl 80-r 192.168.115.176 purl 80-g

View:

Ipvsadm-Ln

Optimize the environment:

Net.ipv4.conf.all.send_redirects = 0

Net.ipv4.conf.default.send_redirects = 0

Net.ipv4.conf.eth0.send_redirects = 0

Install keepalived

Yum install-y gcc* kernel-devel openssl-devel popt-devel ipvsadm

Tar-xvf keepalived-1.2.7.tar.gz

. / configure-- prefix=/-- with-kernel-dir=/usr/src/kernels/2.6.32-131.0.15.el6.i686

Make & & make install

Chkconfig-add keepalived

Chkconfig keepalived on

Service keepalived start

Chkconfig keepalived on

Test machine test:

Successfully taking over from the server: the experiment was successful:

Profile template:

! Configuration File for keepalived

Global_defs {

Router_id LVS_R1

}

Vrrp_instance VI_1 {

State MASTER

Interface eth0

Virtual_router_id 51

Priority 100

Advert_int 1

Authentication {

Auth_type PASS

Auth_pass 1111

}

Virtual_ipaddress {

192.168.115.100

}

}

Virtual_server 192.168.115.100 80 {

Delay_loop 6

Lb_algo rr

Lb_kind DR

Protocol TCP

Real_server 192.168.115.173 80 {

Weight 1

TCP_CHECK {

Connect_port 80

Connect_timeout 3

Nb_get_retry 3

Delay_before_retry 3

}

}

Real_server 192.168.115.176 80 {

Weight 1

TCP_CHECK {

Connect_port 80

Connect_timeout 3

Nb_get_retry 3

Delay_before_retry 3

}

}

}

When doing the slave load scheduler, because two network cards share the same address, an error will be reported when starting the network card.

Solution:

Vim / etc/sysconfig/network-scripts/ifup-eth

Just annotate the contents of the icon.

Then restart the network card

The above is the LVS-DR cluster mode + keepalived shared by Xiaobian to achieve high availability. If you happen to have similar doubts, please refer to the above analysis to understand. If you want to know more about it, you are welcome to follow the industry information channel.

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