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:
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