LVS+keepalive

来源：互联网发布：dhcp服务器需要mac 编辑：程序博客网时间：2024/06/07 22:52

写于2013年秋，CentOS6.4

1、LVS主机

[hadoop@slave3 dw]$ sudo yum install ipvsadm[hadoop@slave3 dw]$ sudo yum install keepalived[hadoop@slave3 dw]$ sudo vi /etc/keepalived/keepalived.conf         ! Configuration File for keepalivedglobal_defs {   router_id LVS_MASTER      #网上资料说这个值也需要修改，具体不详，之前我们线上的主备就一直是一样的 ^ ^还是修改一下吧！}vrrp_instance VI_1 {    state MASTER             #LVS_Backup上修改成BACKUP    interface eth0    virtual_router_id 51    priority 100             #LVS_Backup上修改成80    advert_int 1    authentication {        auth_type PASS        auth_pass 1111    }    virtual_ipaddress {        10.95.3.68    }}virtual_server 10.95.3.68 21050 {    delay_loop 6    lb_algo rr    lb_kind DR    nat_mask 255.255.255.0    persistence_timeout 50    protocol TCP    real_server 10.95.3.67 21050 {        weight 1        TCP_CHECK {               connect_timeout 10               nb_get_retry 3               connect_port 21050        }    }    real_server 10.95.3.65 21050 {        weight 1        TCP_CHECK {               connect_timeout 10               nb_get_retry 3               connect_port 21050        }    }}virtual_server 10.95.3.68 8888 {    delay_loop 6    lb_algo rr    lb_kind DR    nat_mask 255.255.255.0    persistence_timeout 50    protocol TCP    real_server 10.95.3.67 8888 {        weight 1        TCP_CHECK {               connect_timeout 10               nb_get_retry 3               connect_port 8888        }    }    real_server 10.95.3.65 8888 {        weight 1        TCP_CHECK {               connect_timeout 10               nb_get_retry 3               connect_port 8888        }    }}

待检验
[hadoop@slave3 dw]$ vi /dw/bin/vip.sh

!/bin/bash

VIP=10.95.3.68
/sbin/ifconfig eth7:0 VIPbroadcastVIP netmask 255.255.255.255 up
/sbin/route add -host VIPdeveth7:0[hadoop@slave3dw] chmod a+x /dw/bin/vip.sh
[hadoop@slave3 dw]$ sudo /dw/bin/vip.sh
2、每台应用主机

[hadoop@slave4 ~]$  vi /dw/bin/real_server.sh#!/bin/bashVIP=10.95.3.68. /etc/rc.d/init.d/functionscase "$1" instart)     ifconfig lo:0 $VIP netmask 255.255.255.255 broadcast $VIP     /sbin/route add -host $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 $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: $0 {start|stop}"     exit 1esacexit 0[hadoop@slave4 ~]$ chmod u+x /dw/bin/real_server.sh[hadoop@slave4 ~]$ sudo /dw/bin/real_server.sh start

3、lvs主机

[hadoop@slave3 dw]$  sudo chkconfig keepalived on[hadoop@slave3 dw]$ sudo service keepalived restart

4、查看

sudo watch ipvsadm

查看LVS的连接情况: sudo ipvsadm -L -n
查看LVS的吞吐量情况: sudo ipvsadm -L -n --rate
查看LVS的统计信息: sudo ipvsadm -L -n --stats
实时查看LVS连接状态变化: sudo watch ipvsadm -ln
5、ipvsadm命令，此命令只对LVS有效，不会更新到/etc/keepalived/keepalived.conf

sudo ipvsadm -A -t 10.95.3.68:8042 -s rr                               #添加虚拟地址sudo ipvsadm -a -t 10.95.3.68:8042 -r 10.95.3.63:8042 -g        #添加real_server 10.95.3.63并使用dr模式sudo ipvsadm -a -t 10.95.3.68:8042 -r 10.95.3.64:8042 -g          #添加real_server 10.95.3.64并使用dr模式sudo ipvsadm -S                                                  #保存上述规则到内核sudo ipvsadm -d -t 10.95.3.68:8042 -r 10.95.3.64:8042            #删除real_server 10.95.3.64sudo ipvsadm -D -t 10.95.3.68:8042                                        #删除虚拟地址

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