[lvs]lvs的三种模式

回顾了下lvs的三种模式的调度机制
1.lvs的dr模式中的arp的抑制,eth用自己口arp回应.
2.keepalive是否直接操作rs? 不直接操作, 只操作dr(配lvs)
3.tunnel模式keepalive怎么配置?
4.lvs支持的wrr,rr动态调整?

lvs的三种模式和调度机制

http://www.cnblogs.com/f-ck-need-u/p/8451982.html
https://www.cnblogs.com/edisonchou/p/4281978.html

dr模式图

tunnel模式图

三种模式对比

keepalive高可用(vip+rsip)

1,配置lvs
2,实现vip的漂移(vrrp)

dr模式实验

手动配置rs: 思路: 手动绑定vip到rs, 而dr的vip不需要手动配置,ka搞定

SNS_VIP=192.168.80.200
/etc/rc.d/init.d/functions
case "$1" in
start)
       ifconfig lo:0 $SNS_VIP netmask 255.255.255.255 broadcast $SNS_VIP
       /sbin/route add -host $SNS_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
       sysctl -p >/dev/null 2>&1
       echo "RealServer Start OK"
       ;;
stop)
       ifconfig lo:0 down
       route del $SNS_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 1
esac
exit 0

keepalive主的配置

global_defs {  
   notification_email {  
         edisonchou@hotmail.com  
   }  
   notification_email_from sns-lvs@gmail.com  
   smtp_server 192.168.80.1  
   smtp_connection_timeout 30
   router_id LVS_DEVEL  # 设置lvs的id，在一个网络内应该是唯一的
}  
vrrp_instance VI_1 {  
    state MASTER   #指定Keepalived的角色，MASTER为主，BACKUP为备          
    interface eth1  #指定Keepalived的角色，MASTER为主，BACKUP为备
    virtual_router_id 51  #虚拟路由编号，主备要一致
    priority 100  #定义优先级，数字越大，优先级越高，主DR必须大于备用DR    
    advert_int 1  #检查间隔，默认为1s
    authentication {  
        auth_type PASS  
        auth_pass 1111  
    }  
    virtual_ipaddress {  
        192.168.80.200  #定义虚拟IP(VIP)为192.168.2.33，可多设，每行一个
    }  
}  
# 定义对外提供服务的LVS的VIP以及port
virtual_server 192.168.80.200 80 {  
    delay_loop 6 # 设置健康检查时间，单位是秒                    
    lb_algo wrr # 设置负载调度的算法为wlc                   
    lb_kind DR # 设置LVS实现负载的机制，有NAT、TUN、DR三个模式   
    nat_mask 255.255.255.0                
    persistence_timeout 0          
    protocol TCP                  
    real_server 192.168.80.102 80 {  # 指定real server1的IP地址
        weight 3   # 配置节点权值，数字越大权重越高              
        TCP_CHECK {  
        connect_timeout 10         
        nb_get_retry 3  
        delay_before_retry 3  
        connect_port 80  
        }  
    }  
    real_server 192.168.80.103 80 {  # 指定real server2的IP地址
        weight 3  # 配置节点权值，数字越大权重越高  
        TCP_CHECK {  
        connect_timeout 10  
        nb_get_retry 3  
        delay_before_retry 3  
        connect_port 80  
        }  
     }  
} 

另一个tunnel实验附: lvs的tunnel模式rs的一段配置(看他手动配了tun0)

# ifconfig tunl0 10.6.2.195 broadcast 10.6.2.195 netmask 255.255.255.255 up
# route add -host 10.6.2.195 dev tunl0
# echo "0" > /proc/sys/net/ipv4/ip_forward
# echo 1 > /proc/sys/net/ipv4/conf/tunl0/arp_ignore
# echo 2 > /proc/sys/net/ipv4/conf/tunl0/arp_announce
# echo 1 > /proc/sys/net/ipv4/conf/all/arp_ignore
# echo 2 > /proc/sys/net/ipv4/conf/all/arp_announce
# echo 0 > /proc/sys/net/ipv4/conf/tunl0/rp_filter
# echo 0 > /proc/sys/net/ipv4/conf/all/rp_filter