LVS compilation and installation of Dr Model

I. Environment

System: centos 6.4x64 minimal installation

DR: 192.168.3.20

RS1: 192.168.3.21

Rs2: 192.168.3.22

VIP: 192.168.3.23

2. Configure the HTTPd service on the RealServer for testing.

RS1 Configuration

[[Email protected] ~] # Yum install httpd-y [[email protected] ~] # Service httpd startstarting httpd: apr_sockaddr_info_get () failed for rs1httpd: cocould not reliably determine the server's fully qualified domain name, using 127.0.0.1 for servername [OK] # firewall disabled, avoid impact on the experiment [[email protected] ~] # Service iptables stopiptables: flushing firewall rules: [OK] iptables: Setting chains to policy accept: Filter [OK] iptables: unloading modules: [OK] [email protected] ~] # Echo "RS1 server">/var/www/html/index.html [[email protected] ~] # Curl http: // 127.0.0.1rs1 Server

Rs2 Configuration

[[Email protected] ~] # Yum install httpd-y [[email protected] ~] # Service httpd startstarting httpd: apr_sockaddr_info_get () failed for rs2httpd: cocould not reliably determine the server's fully qualified domain name, using 127.0.0.1 for servername [OK] # firewall disabled, avoid impact on the experiment [[email protected] ~] # Service iptables stopiptables: flushing firewall rules: [OK] iptables: Setting chains to policy accept: Filter [OK] iptables: unloading modules: [OK] [email protected] ~] # Echo "rs2 server">/var/www/html/index.html [[email protected] ~] # Curl rs2 Server

Iii. Dr configuration and installation

Install basic software package

[[email protected] ~]# yum install make popt  libnl  libnl-devel  popt-static gcc* -y

Download and install the software package

[[Email protected] ~] # Wget http://www.linuxvirtualserver.org/software/kernel-2.6/?sadm-1.26.tar.gz##email protected] ~] # Tar xf ipvsadm-1.26.tar.gz [[email protected] ~] # Cd ipvsadm-1.26 [[email protected] ipvsadm-1.26] # Make [[email protected] ipvsadm-1.26] # make install # execute ipvsadm -- help after installation is complete, if the help information output, indicates that the [[email protected] ipvsadm-1.26] # installing SADM -- Help

4. Configure the RealServer VIP

Run the script on RealServer to configure VIP. The script content is as follows:

#!/bin/bashVIP=192.168.3.23source /etc/rc.d/init.d/functionscase "$1" instart)       ifconfig lo:0 $VIP netmask 255.255.255.255 broadcast $VIP       /sbin/route add -host $VIP dev lo:0       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       echo "RealServer Start OK"       ;;stop)       ifconfig lo:0 down       route del $VIP >/dev/null 2>&1       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 "RealServer Stoped"       ;;       *)       echo "Usage: $0 {start|stop}"       exit 1esacexit 0

Execute scripts

[[email protected] ~]# sh realserver.sh startRealServer Start OK[[email protected] ~]# ip a|grep 3.23    inet 192.168.3.23/32 brd 192.168.3.23 scope global lo:0

Perform the same operation on rs2

[[email protected] ~]# sh realserver.sh startRealServer Start OK[[email protected] ~]# ip a |grep 3.23    inet 192.168.3.23/32 brd 192.168.3.23 scope global lo:0

5. Add cluster services on Dr

# Configure VIP on Dr [[email protected] ~] # Ifconfig eth0: 0 192.168.3.23 [[email protected] ~] # IP A1: Lo: <loopback, up, lower_up> MTU 16436 qdisc noqueue state unknown link/loopback 00: 00: 00: 00: 00 BRD 00: 00: 00: 00: 00: 00: 00 Inet 127.0.0.1/8 Scope host lo inet6: 1/128 scope host valid_lft forever preferred_lft forever2: eth0: <broadcast, multicast, up, lower_up> MTU 1500 qdisc pfifo_fast state up qlen 1000 link/ether 00: 0C: 29: E0: CA: 92 brd ff: FF Inet 192.168.3.20/24 BRD 192.168.3.255 Scope global eth0 Inet 192.168.3.23/24 BRD 192.168.3.255 scope global secondary eth0: 0 inet6 fe80: 20c: 29ff: fee0: ca92/64 scope link valid_lft forever preferred_lft forever [[email protected] ~] # Ipvsadm-a-t 192.168.3.23: 80-s RR # description #-A indicates adding #-T indicates adding a VIP record, the listening port is 80 #-s, indicating that the scheduling algorithm is polling [[email protected] ~] # Ipvsadm-a-t 192.168.3.23: 80-r 192.168.3.21-G [[email protected] ~] # Ipvsadm-a-t 192.168.3.23: 80-r 192.168.3.22-G # The preceding command indicates adding the backend RealServer service.-G indicates the Dr mode [email protected] ~] # Ipvsadm-L-nip virtual server version 1.2.1 (size = 4096) prot localaddress: Port sched1_flags-> remoteaddress: port forward weight activeconn inactconntcp 192.168.3.23: 80 rr-> 192.168.3.21: 80 Route 1 0 0-> 192.168.3.22: 80 Route 1 0 0 # disable Dr firewall [email protected] ~] # Service iptables stop

Test 1: Access http: // 192.168.3.23 directly

[[Email protected] ~] # Curl http: // 192.168.3.23rs2 server [[email protected] ~] # Curl http: // 192.168.3.23rs1 server [[email protected] ~] # Curl http: // 192.168.3.23rs2 server [[email protected] ~] # Curl http: // 192.168.3.23rs1 serve # The above results show that the basic functions of LVS have been implemented.

Test 2: delete the backend RS1 and verify that http: // 192.168.3.23 can be accessed.

[[Email protected] ~] # Ipvsadm-D-T 192.168.3.23: 80-r 192.168.3.21 [[email protected] ~] # Ipvsadm-L-nip virtual server version 1.2.1 (size = 4096) prot localaddress: Port sched1_flags-> remoteaddress: port forward weight activeconn inactconntcp 192.168.3.23: 80 rr-> 192.168.3.22: 80 Route 1 0 0 # at this time, RealServer only provides HTTPd service for 192.168.3.22. The access result should be rs2 server # Test Access http: // 192.168.3.23. The result is correct [email protected] ~] # Curl http: // 192.168.3.23rs2 server [[email protected] ~] # Curl http: // 192.168.3.23rs2 Server

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LVS compilation and installation of Dr Model