LVS-DR Architecture principle and implementation scheme

Implementing virtual servers via direct routing (VS/DR)

As with the Vs/tun method, VS/DR takes advantage of the asymmetric features of most internet services, where the load scheduler is only responsible for scheduling requests, and the server directly returns the response to the customer, which can greatly improve the throughput of the entire cluster system. VS/DR Architecture: Both the Scheduler and the server group must physically have a network card connected via a disconnected LAN, such as through a high-speed switch or hub. VIP address for Dispatcher and server group sharing, dispatcher configuration VIP address is externally visible, used to receive virtual service request message; All servers configure VIP addresses on their non-arp network devices, which are not visible to the outside, but only for the purpose of handling network requests with the VIP address.

650) this.width=650; "style=" width:600px;height:571px; "src=" http://s3.51cto.com/wyfs02/M02/6E/3A/ Wkiol1v28dudkvjbaagzkyn5ztq578.jpg "title=" vs-dr.jpg "alt=" wkiol1v28dudkvjbaagzkyn5ztq578.jpg "border=" 0 "height=" 571 "hspace=" 0 "vspace=" 0 "width="/> "

Dr Basic Architecture implementation

Environment Preparation:

Equipment	Software Environment	Network environment
Director_server (DIRDR)	Centos+ipvs	RIP eth0_192.168.1.121
		VIP eth0:0_192.168.1.200
Real_server_a (RSA)	Centos	RIP eth0_192.168.1.118
		VIP lo:0_192.168.1.200
Real_server_b (RSB)	Centos	RIP eth0_192.168.1.119
		VIP lo:0_192.168.1.200

Operation Scheme:

The #  is configured on dir [[Email protected] ~]# vim /usr/local/sbin/lvs_dr.sh#! /bin/bashecho  1 > /proc/sys/net/ipv4/ip_forwardipv=/sbin/ipvsadmvip=192.168.1.200rs1=192.168.1.118rs2= 192.168.1.119ifconfig eth0:0  $VIP  broadcast  $vip  netmask 255.255.255.255  uproute add -host  $vip  dev eth0:0$ipv -C$ipv -A -t  $VIP: 80 - s rr$ipv -a -t  $VIP:80 -r  $rs 1:80 -g -w 1$ipv -a -t   $VIP:80 -r  $rs 2:80 -g -w 1[[email protected] ~]# chmod a+x  /usr/local/sbin/lvs_dr.sh[[email protected] ~]# /bin/bash /usr/local/sbin/lvs_dr.sh[ [email protected] ~]# ipvsadm -lnip virtual server version 1.2.1  (size=4096) prot localaddress:port scheduler flags  -> remoteaddress:port            forward weight activeconn inactconntcp   192.168.1.200:80 rr  -> 192.168.1.118:80              Route   1      0           0  -> 192.168.1.119:80              Route   1       0          0[[email protected] ~]#  ifconfig -aeth0      Link encap:Ethernet  HWaddr  00:0c:29:55:3e:24          inet addr:192.168.1.121   Bcast:192.168.1.255  Mask:255.255.255.0           INET6 ADDR: FE80::20c:29ff:fe55:3e24/64 scope:link          up  broadcast running multicast  mtu:1500  metric:1           rx packets:700 errors:0 dropped:0 overruns:0 frame:0           tx packets:474 errors:0 dropped:0  overruns:0 carrier:0          collisions:0  txqueuelen:1000          rx bytes:68287  (66.6  kib)   TX bytes:76635  (74.8 kib)            interrupt:18 base address:0x2000eth0:0    link encap:ethernet   hwaddr 00:0c:29:55:3e:24          inet  addr:192.168.1.200   bcast:192.168.1.200  mask:255.255.255.255           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1           Interrupt:18 Base address:0x2000lo         Link encap:Local Loopback           inet addr:127.0.0.1  Mask:255.0.0.0           inet6 addr: ::1/128 Scope:Host           UP LOOPBACK RUNNING  MTU:65536  Metric:1           rx packets:0 errors:0 dropped:0 overruns:0 frame : 0          tx packets:0 errors:0 dropped:0  overruns:0 carrier:0          collisions:0 txqueuelen:0           RX bytes:0  (0.0 b)   TX bytes:0  ( 0.0 B) #  configured on RSA and RSB [[email protected] ~]# vim /usr/local/sbin/lvs_dr_rs.sh#!  /bin/bashvip=192.168.1.200ifconfig lo:0  $VIP  broadcast  $vip  netmask  255.255.255.255 uproute add -host  $vip  lo:0echo  "1"  >/proc/sys/net/ipv4/ conf/lo/arp_ignoreecho  "2"  >/proc/sys/net/ipv4/conf/lo/arp_announceecho  "1"  >/proc/ sys/net/ipv4/conf/all/arp_ignoreecho  "2"  >/proc/sys/net/ipv4/conf/all/arp_announce[[email  protected] ~]# chmod a+x /usr/local/sbin/lvs_dr_rs.sh[[email protected] ~]#  /bin/bash /usr/local/sbin/lvs_dr_rs.sh[[email protected] ~]# ifconfig -aeth0      &nbSp link encap:ethernet  hwaddr 00:0c:29:56:5c:c5           inet addr:192.168.1.118  bcast:192.168.1.255  mask:255.255.255.0           inet6 addr: fe80::20c:29ff:fe56:5cc5/64  scope:link          up broadcast running  MULTICAST  MTU:1500  Metric:1           RX packets:549 errors:0 dropped:0 overruns:0 frame:0           TX packets:424 errors:0 dropped:0 overruns:0  carrier:0          collisions:0 txqueuelen:1000           RX bytes:55100  (53.8 kib)   tx  bytes:61251  (59.8&NBsp KiB)           interrupt:18 base address:0x2000lo         Link encap:Local Loopback           inet addr:127.0.0.1  Mask:255.0.0.0           inet6 addr: ::1/128 Scope:Host           up loopback running  mtu:65536  metric:1           rx packets:2 errors:0 dropped:0  overruns:0 frame:0          tx packets:2  errors:0 dropped:0 overruns:0 carrier:0           collisions:0 txqueuelen:0          RX  bytes:160  (160.0 b)   tx bytes:160  (160.0 b) lo:0      link encap:local  Loopback          inet addr:192.168.1.200   Mask:255.255.255.255          UP LOOPBACK  Running  mtu:65536  metric:1

Browser testing:

650) this.width=650; "src=" Http://s3.51cto.com/wyfs02/M01/6E/3B/wKioL1V3AfexagjeAACAsWoBmRw122.jpg "title=" 200a.jpg "alt=" Wkiol1v3afexagjeaacaswobmrw122.jpg "/>

650) this.width=650; "src=" Http://s3.51cto.com/wyfs02/M01/6E/3E/wKiom1V3AGDSom3aAACIdgLgNqE124.jpg "title=" 200b.jpg "alt=" Wkiom1v3agdsom3aaacidglgnqe124.jpg "/>

Testing effects on Linux clients

[Email protected] ~]# Curl 192.168.1.200This is test page,this was a.[[email protected] ~]# Curl 192.168.1.200This is test Page,this is b.[[email protected] ~]# Curl 192.168.1.200This are test page,this is a.[[email protected] ~]# Curl 192.168.1 .200This is test page,this is b.[[email protected] ~]# Curl 192.168.1.200This are test page,this is a.[[email protected] ~] # Curl 192.168.1.200This is Test page,this is B.

This article is from the "topspeed_king" blog, make sure to keep this source http://mylinuxlife.blog.51cto.com/4706737/1660237

LVS-DR Architecture principle and implementation scheme