CentOS6.4 lvs+keepalived High Availability load Balancing service configuration

CentOS6.4 lvs+keepalived High Availability load Balancing service configuration

One: test environment information

Server dell-r720

Virtualization KVM

Virtual Machine 4 units: IPVS01,IPVS02,WEB01,WEB02

[root@kvm01~]# Virsh List

Id Name State

----------------------------------------------------

1 SN-WEB01 Running

2 SN-WEB02 Running

3 Sn-ipvs01 Running

4 SN-IPVS02 Running

Network environment:

ipvs01:192.168.40.90

ipvs02:192.168.40.91

web01:192.168.40.86

web02:192.168.40.87

vip:192.168.40.6

System version:

Physics Machine CentOS6.4 64bit

Virtual Machine CentOS6.4 64bit

Second: Service configuration

The package 6.4 system has been ipvs1.25 and keepalived1.2.7 tested with Yum self installation.

Main LVS Server IPVS01 configuration:

[Root@ipvs01 ~]# Yum list >yum.list

[Root@ipvs01 ~]# cat Yum.list|grep Ipvs

ipvsadm.x86_64 1.25-10.el6 @base

[Root@ipvs01 ~]# cat yum.list |grep keepalived

keepalived.x86_64 1.2.7-3.el6 @base

[root@ipvs01 ~] #yum Install Ipvsadm keepalived

[Root@ipvs01 ~] #ipvsadm

[root@ipvs01 ~] #lsmod |grep Ip_vs to see if the module was loaded successfully

IP_VS_RR 1420 1

IP_VS_WRR 2179 0

Ip_vs 115643 5 IP_VS_RR,IP_VS_WRR

LIBCRC32C 1246 1 Ip_vs

IPv6 321422 Ip_vs

[root@ipvs01 ~] #cd/etc/keepalived/

[root@ipvs01 ~] #cp-a keepalived.conf/keepalived.bak

[root@ipvs01 ~] #vi 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

router_id Lvs_master

}

Vrrp_instance Vi_1 {

State MASTER #角色主MASTER, the standby server is changed to backup

Interface Eth0 #HA侦听接口

virtual_router_id #虚拟路由标记ID, the same group VRRP consistent

Priority #优先级自定义, master higher than backup

Advert_int 1 #HA interception interval: 1 seconds

Authentication {#认证形式

Auth_type Pass #认证类型PASS: Pass/ah 2 kinds of optional

Auth_pass 1111 #认证密码, same group VRRP passwords consistent

}

virtual_ipaddress {#虚拟服务地址, can be multiple, divided multiple lines

192.168.40.6

}

}

Virtual_server 192.168.40.6 {#虚拟服务地址和端口

Delay_loop 6 #运行情况检查, unit seconds

Lb_algo RR #负载调度算法, RR for polling

Lb_kind DR #LVS负载工作模式为DR, three modes NAT,TUN,DR

Nat_mask 255.255.255.0 #网络掩码

#persistence_timeout #会话保持时间, allocate the same node within 50 seconds, the test time to see the balance effect can be commented out

Protocol TCP #协议类型TCP/UDP

Real_server 192.168.40.86 {#配置真实服务器节点1 IP and port

Weight 5 #权值大小, the more powerful the higher the value

Tcp_check {#realserver state detection time, unit seconds

Connect_timeout 3 #连接超时时间3秒

Nb_get_retry 3 #重试次数: 3 times

Delay_before_retry 3 #重试间隔

Connect_port #连接端口

}

}

Real_server 192.168.40.87 80 {

Weight 5

Tcp_check {

Connect_timeout 3

Nb_get_retry 3

Delay_before_retry 3

Connect_port 80

}

}

}

Standby server IPVS02 Copy the primary server configuration file, and then modify 2:

State BACKUP

Priority 100

Others remain unchanged.

Three: Service node configuration:

WEB01,WEB02, HTTP service installation slightly

[Root@web01 ~]# cat/var/www/html/index.html

[Root@web02 ~]# cat/var/www/html/index.html

Run scripts separately on WEB01 and WEB02

Ifconfig lo:0 192.168.40.6 netmask 255.255.255.0 up

Route add-host 192.168.40.6 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

View route after execution to have a virtual IP route pointing lo Interface

[Root@web01 ~]# Route-n

Kernel IP Routing Table

Destination Gateway genmask Flags Metric Ref use Iface

192.168.40.6 0.0.0.0 255.255.255.255 UH 0 0 0 Lo

Four: Test LVs

Will IPVS01,IPVS02, keepalived service launch

Will web01,web02, HTTP service start

View the LVS status on the main LVS server as described in the following configuration effective

[Root@ipvs01 ~]# Ipvsadm-ln

IP Virtual Server version 1.2.1 (size=4096)

Prot Localaddress:port Scheduler Flags

-> remoteaddress:port Forward Weight activeconn inactconn

TCP 192.168.40.6:80 RR Persistent 50

-> 192.168.40.86:80 Route 5 0 0

-> 192.168.40.87:80 Route 5 0 0

From the IP a command, the virtual IP is now on the ipvs01, and IP A has no virtual IP from the server

[Root@ipvs01 ~]# IP A

1:lo: <LOOPBACK,UP,LOWER_UP> MTU 16436 qdisc noqueue State UNKNOWN

Link/loopback 00:00:00:00:00:00 BRD 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 Forever

2:eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> MTU 1500 Qdisc pfifo_fast State up Qlen 1000

Link/ether 52:54:00:06:88:F4 BRD FF:FF:FF:FF:FF:FF

inet 192.168.40.90/24 BRD 192.168.40.255 Scope Global eth0

inet 192.168.40.6/32 Scope Global eth0

Inet6 FE80::5054:FF:FE06:88F4/64 Scope link

Valid_lft Forever Preferred_lft Forever

> Test Load Balancing Effect:

To open the browser test:

Refresh a bit.