LVS +keepalived

环境准备：#

  准备4台机器，两台装好LVS和Keepalived，作为调度器，另外两台装好httpd服务，作为Real Server。

网络配置:

Diretcory:

名称	接口	IP	用途
MASTER	eth0	192.168.1.19	用于WAN的数据转发
	eth1	10.0.0.19	用于LAN的数据转发
	eth2	10.0.2.19	用于LB之间的心跳连接
VIP		192.168.1.29	解析到www.zydev.com
BACKUP	eth0	192.168.1.16	用于WAN的数据转发
	eth1	10.0.0.16	用于LAN的数据转发
	eth2	10.0.2.16	用于LB之间的心跳连接
VIP		暂无
LAN不需要配置网关

 

 

 

 

 

 

 

 

 

 

 

 

 

 

具体的网卡参数配置以MASTER的3块网卡为例

DEVICE=eth0
HWADDR=00:0c:29:e7:ba:c6
TYPE=Ethernet
UUID=af441a22-3ba9-42fe-9748-eeb78eccb374
ONBOOT=yes
NM_CONTROLLED=yes
BOOTPROTO=none
USERCTL=no
IPV6INIT=no
IPADDR=192.168.1.19
NETMASK=255.255.255.0
GATEWAY=192.168.1.1

DEVICE=eth1
HWADDR=00:0c:29:e7:ba:bc
TYPE=Ethernet
ONBOOT=yes
BOOTPROTO=none
IPADDR=10.0.0.19
NETMASK=255.255.255.0

DEVICE=eth2
HWADDR=00:0c:29:e7:ba:d0
TYPE=Ethernet
ONBOOT=yes
BOOTPROTO=none
IPADDR=10.0.2.19
NETMASK=255.255.255.0

 

RSV

Real Server

名称	接口	IP	用途
RS1	eth0	192.168.1.17	用于WAN数据转发
	eth1	10.0.0.17	用于LAN数据转发
RS2	eh0	192.168.1.18	用于WAN数据转发
	eth1	10.0.0.18	用于LAN数据转发
VIP		暂无

 

 

 

 

 

 

 

 

具体的网卡参数配置：

DEVICE=eth0
HWADDR=00:0c:29:a4:65:08
TYPE=Ethernet
ONBOOT=yes
NM_CONTROLLED=yes
BOOTPROTO=none
DNS2=8.8.8.8
DNS1=114.114.114.114
IPV6INIT=no
USERCTL=no
IPADDR=192.168.1.17
NETMASK=255.255.255.0
GATEWAY=192.168.1.1

DEVICE=eth1
HWADDR=00:0c:29:a4:65:12
TYPE=Ethernet
ONBOOT=yes
BOOTPROTO=none
IPADDR=10.0.0.17
NETMASK=255.255.255.0
~                       

 

配置调度器#

Master

vim /etc/keepalived/keepalived.conf

! Configuration File for keepalived

global_defs {
   notification_email {
    zy5724@163.com
   }
   notification_email_from Alexandre.Cassen@firewall.loc
   smtp_server 127.0.0.1
   smtp_connect_timeout 30
   router_id LVS_01
}
                                                     
vrrp_instance VI_1 {
    state MASTER                       #备份服务器上MASTER为BACKUP
    interface eth0        
    lvs_sync_daemon_inteface eth2    #心跳线的网卡
    virtual_router_id 51
    priority 100                        #备份服务上优先级要低于100，如改为90
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    virtual_ipaddress {
      192.168.1.29/24                   #注意，这是是模拟外网IP。
    }
}
#
virtual_server 192.168.1.29 80 {
    delay_loop 6              
    lb_algo wrr                
    lb_kind DR                
    nat_mask 255.255.255.0
    persistence_timeout 50        #会话保持  
    protocol TCP                

    real_server 192.168.1.17 80 {
        weight 1              
        TCP_CHECK {
        connect_timeout 8       
        nb_get_retry 3
        delay_before_retry 3
        connect_port 80
        }
    }

    real_server 192.168.1.18 80 {
        weight 1              
        TCP_CHECK {
        connect_timeout 8       
        nb_get_retry 3
        delay_before_retry 3
        connect_port 80
        }
    }
}

BACKUP

! Configuration File for keepalived

global_defs {
   notification_email {
    zy5724@163.com
   }
   notification_email_from Alexandre.Cassen@firewall.loc
   smtp_server 127.0.0.1
   smtp_connect_timeout 30
   router_id LVS_02
}
                                                     
vrrp_instance VI_1 {
    state BACKUP               #备份服务器上MASTER为BACKUP
    interface eth0
    lvs_sync_daemon_inteface eth2
    virtual_router_id 51
    priority 90                #备份服务上优先级要低于100，如改为90
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    virtual_ipaddress {
      192.168.1.29/24             #注意，这是是模拟外网IP。
    }
}
#
virtual_server 192.168.1.29 80 {
    delay_loop 6              
    lb_algo wrr                
    lb_kind DR                
    nat_mask 255.255.255.0
    persistence_timeout 50     
    protocol TCP                

    real_server 192.168.1.17 80 {
        weight 1              
        TCP_CHECK {
        connect_timeout 8       
        nb_get_retry 3
        delay_before_retry 3
        connect_port 80
        }
    }

    real_server 192.168.1.18 80 {
        weight 1              
        TCP_CHECK {
        connect_timeout 8       
        nb_get_retry 3
        delay_before_retry 3
        connect_port 80
        }
    }
}

 

启动keepalived,查看LVS情况

 

 

配置RealServer#

RS1

ifconfig lo:17 192.168.1.29 netmask 255.255.255.255 up
route add -host 192.168.1.29 dev lo
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

RS2

ifconfig lo:18 192.168.1.29 netmask 255.255.255.255 up
route add -host 192.168.1.29 dev lo
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

 

访问http://192.168.1.29,可以发现实现了高可用和负载均衡。