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This article mainly introduces "LVS environment building steps". In daily operation, I believe many people have doubts about the steps of building LVS environment. The editor consulted all kinds of materials and sorted out simple and easy-to-use operation methods. I hope it will be helpful for you to answer the doubts about "LVS environment building steps"! Next, please follow the editor to study!

[root@localhost soft] # uname-a

Linux localhost.localdomain 2.6.32-431.el6.x86_64 # 1 SMP Fri Nov 22 03:15:09 UTC 2013 x86'64 GNU/Linux

[root@localhost soft] # cat / etc/redhat-release

CentOS release 6.5 (Final)

LVS version: ipvsadm-1.26

Keepalived version: keepalived-1.2.4

Popt-static:popt-static-1.13-7.el6.x86_64.rpm

[root@localhost soft] # yum install popt*

Http://linux.linuxidc.com/2012%E5%B9%B4%E8%B5%84%E6%96%99/3%E6%9C%88/24%E6%97%A5/%E8%A7%A3%E5%86%B3CentOS%206.2%E4%B8%8B%E5%AE%89%E8%A3%85ipvsadm-1.26%E6%8A%A5%E9%94%99/

Free download address at http://linux.linuxidc.com/

Both user name and password are www.linuxidc.com

Download the directory in / 2012 / March / 24 / solve the error report of installing ipvsadm-1.26 under CentOS 6.2 /

Ln-s / usr/src/kernels/2.6.32-279.el6.i686//usr/src/linux/

Ip planning

External vip192.168.88.100

LVS1

[root@localhost ipvsadm-1.26] # rpm-qa | grep popt

Popt-1.13-7.el6.x86_64

Popt-static-1.13-7.el6.x86_64

Popt-devel-1.13-7.el6.x86_64

[root@localhost ipvsadm-1.26] # rpm-qa | grep libnl

Libnl-1.1.4-2.el6.x86_64

Libnl-devel-1.1.4-2.el6.x86_64

[root@localhost soft] # cd ipvsadm-1.26

[root@localhost soft] # tar-zxf ipvsadm-1.26.tar.gz

[root@localhost ipvsadm-1.26] # make & & make install

[root@localhost ~] # lsmod | grep ip_vs

Ip_vs_rr 1420 0

Ip_vs 125220 2 ip_vs_rr

Libcrc32c 1246 1 ip_vs

Ipv6 317340 144 ip_vs,ip6t_REJECT,nf_conntrack_ipv6,nf_defrag_ipv6

Echo "1" > / proc/sys/net/ipv4/ip_forward

[root@localhost ~] # ifconfig eth2:1 192.168.88.100 netmask 255.255.255.0 up

Or

[root@localhost ~] # ifconfig eth2:1 192.168.88.100 netmask 255.255.255.255 up

[root@localhost ~] # route add-host 192.168.88.100 dev eth2

[root@localhost] # ipvsadm-C

[root@localhost] # ipvsadm-A-t 192.168.88.100 rr 80-s rr-p 600

[root@localhost] # ipvsadm-a-t 192.168.88.100REV 80-r 192.168.88.147RV 80-g

[root@localhost] # ipvsadm-a-t 192.168.88.100REV 80-r 192.168.88.149RV 80-g

[root@localhost] # ipvsadm-L-n-- stats

IP Virtual Server version 1.2.1 (size=4096)

Prot LocalAddress:Port Conns InPkts OutPkts InBytes OutBytes

-> RemoteAddress:Port

TCP 192.168.88.100:80 00 00 0

-> 192.168.60.149Vera 8000000

-> 192.168.88.147Vera 8000000

LVS

REALSERVER

[root@localhost ~] # ifconfig lo:0 192.168.88.100 netmask 255.255.255.255 up

[root@localhost ~] # route add-host 192.168.88.100 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

In the above operation, the first line clears all records from the kernel virtual server list, and the second line adds a new virtual IP record. The new IP is 192.168.60.200

At the same time, the service duration is specified as 600 seconds. The third and fourth lines add two new IP records to the new virtual Real Server record, and specify that the working mode of the LVS is direct routing mode.

View ipv list status: watch ipvsadm-ln

Modify / etc/selinux/config file

Change SELINUX=enforcing to SELINUX=disabled

Yum install openssl-devel

[root@localhost soft] # wget http://www.keepalived.org/software/keepalived-1.2.4.tar.gz

[root@localhost soft] # tar zxvf keepalived-1.2.4.tar.gz

[root@localhost soft] # cd keepalived-1.2.4

[root@localhost keepalived-1.2.4] # / configure & & make & & make install

# make keepalived into a startup service for easy management #

[root@localhost keepalived-1.2.4] # mkdir / etc/keepalived/

[root@localhost keepalived-1.2.4] # cp / usr/local/etc/rc.d/init.d/keepalived / etc/init.d/

[root@localhost keepalived-1.2.4] # cp / usr/local/etc/sysconfig/keepalived / etc/sysconfig/

[root@localhost keepalived-1.2.4] # cp / usr/local/etc/keepalived/keepalived.conf / etc/keepalived/

[root@localhost keepalived-1.2.4] # cp / usr/local/sbin/keepalived / usr/sbin/

[root@localhost keepalived-1.2.4] # service keepalived start

2. Enable routing forwarding

[root@localhost keepalived-1.2.4] # vim / etc/sysctl.conf

Net.ipv4.ip_forward = 1

Root@localhost keepalived-1.2.4] # sysctl-p

Net.ipv4.ip_forward = 1

Net.ipv4.conf.default.rp_filter = 1

Net.ipv4.conf.default.accept_source_route = 0

Kernel.sysrq = 0

Kernel.core_uses_pid = 1

Net.ipv4.tcp_syncookies = 1

Net.bridge.bridge-nf-call-ip6tables = 0

Net.bridge.bridge-nf-call-iptables = 0

Net.bridge.bridge-nf-call-arptables = 0

Kernel.msgmnb = 65536

Kernel.msgmax = 65536

Kernel.shmmax = 68719476736

Kernel.shmall = 4294967296

3. Configure Keepalived vi / etc/keepalived/keepalived.conf

! Configuration File for keepalived

Global_defs {

Notification_email {

Acassen@firewall.loc

Failover@firewall.loc

Sysadmin@firewall.loc

}

Notification_email_from Alexandre.Cassen@firewall.loc

Smtp_server 192.168.200.1

Smtp_connect_timeout 30

Change to LVS_BACKUP on router_id LVS_MASTER # BACKUP

}

Vrrp_instance VI_1 {

Change to BACKUP on state MASTER # BACKUP

Interface eth2

Virtual_router_id 51

Modified to 80 on priority 100 # BACKUP

Advert_int 1

Authentication {

Auth_type PASS

Auth_pass 1111

}

Virtual_ipaddress {

192.168.88.100

}

}

Vrrp_instance LAN_GATEWAY {

Change to LVS_BACKUP on state MASTER # BACKUP

Interface eth3

Virtual_router_id 52

Modified to 80 on priority 100 # BACKUP

Advert_int 1

Authentication {

Auth_type PASS

Auth_pass 1111

}

Virtual_ipaddress {

192.168.88.2

}

}

Virtual_server 192.168.88.100 80 {

Delay_loop 6

Lb_algo rr

Lb_kind NAT

Nat_mask 255.255.255.0

Persistence_timeout 50

Protocol TCP

Real_server 192.168.88.147 80 {

Weight 1

TCP_CHECK {

Connect_timeout 3

Nb_get_retry 3

Delay_before_retry 3

Connect_port 80

}

}

Real_server 192.168.88.148 80 {

Weight 3

TCP_CHECK {

Connect_timeout 3

Nb_get_retry 3

Delay_before_retry 3

Connect_port 80

}

}

}

The BACKUP server is the same as the above configuration, first install lvs and then install keepalived, and then configure / etc/keepalived/keepalived.conf, you only need to change the annotations.

, LVS load balancing configuration

Ifconfig eth2:0 192.168.88.100 netmask 255.255.255.255 broadcast 192.168.88.255 up

Route add-host 192.168.10.3 dev eth2:0

Ipvsadm-C

Ipvsadm-A-t 192.168.10.3 8080-s rr

# Set Real Server

Ipvsadm-a-t 192.168.10.3 8080-r 192.168.10.7 purl 8080-g

Ipvsadm-a-t 192.168.10.3 8080-r 192.168.10.11 purl 8080-g

Ipvsadm

IP Virtual Server version 1.2.1 (size=4096)

Prot LocalAddress:Port Scheduler Flags

-> RemoteAddress:Port

Forward Weight ActiveConn InActConn

TCP

192.168.10.3:webcache wrr

-> 192.168.10.11:webcache

Route

-> 192.168.10.7:webcache

In addition, each one

Real Server

To execute the following command on the

Ifconfig lo:0 192.168.10.3 netmask 255.255.255.255 broadcast 192.168.10.255 up

Route add-host 192.168.10.3 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

Sysctl-p

Http://www.cnblogs.com/mchina/archive/2012/08/27/2644391.html

Http://blog.chinaunix.net/uid-20794164-id-1840738.html

At this point, the study on the steps of building a LVS environment is over. I hope to be able to solve your 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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