1. LVS + Keepalived之三大模式
  2. ======================================================================================
  3. NAT模式:
  4. ======================================================================================
  5. 一、仅lvs服务器端安装
  6. yum install ipvsadm openssl-devel popt popt-devel libnl-devel
  7. cd /opt/src/
  8. tar xzvf keepalived-1.2.7.tar.gz
  9. cd keepalived-1.2.7
  10. ./configure
  11. make && make install
  12. cp /usr/local/etc/rc.d/init.d/keepalived /etc/rc.d/init.d/
  13. cp /usr/local/etc/sysconfig/keepalived /etc/sysconfig/
  14. mkdir /etc/keepalived
  15. cp /usr/local/etc/keepalived/keepalived.conf /etc/keepalived/
  16. cp /usr/local/sbin/keepalived /usr/sbin/
  17.  
  18. 修改/etc/keepalived/keepalived.conf文件
  19. [root@WEB ~]# cat /etc/keepalived/keepalived.conf
  20. ! Configuration File for keepalived
  21.  
  22. global_defs {
  23.    notification_email {
  24.  
  25.      123@123.com
  26.    }
  27.    notification_email_from 123@123.com
  28.    smtp_server mail.123.com
  29.    smtp_connect_timeout 30
  30.    router_id LVS_DEVEL
  31. }
  32.  
  33. vrrp_instance VI_1 {
  34.     state MASTER
  35.     interface eth0
  36.     virtual_router_id 52
  37.     priority 100
  38.     advert_int 1
  39.     authentication {
  40.         auth_type PASS
  41.         auth_pass 1111
  42.     }
  43.     virtual_ipaddress {
  44.        88.88.88.88
  45.     }
  46. }
  47. vrrp_instance LAN_GATEWAY {
  48.     state MASTER
  49.     interface eth1
  50.     virtual_router_id 52
  51.     priority 100
  52.     advert_int 1
  53.     authentication {
  54.         auth_type PASS
  55.         auth_pass 1111
  56.     }
  57.     virtual_ipaddress {
  58.         192.168.1.88
  59.     }
  60. }
  61. virtual_server 88.88.88.88 80 {
  62.     delay_loop 6
  63.     lb_algo lc
  64.     #lb_kind DR
  65.     #lb_kind TUN
  66.     lb_kind NAT
  67.     persistence_timeout 60
  68.     protocol TCP
  69.  
  70.     real_server 192.168.1.18 80 {
  71.         weight 3
  72.         TCP_CHECK {
  73.         connect_timeout 30
  74.         nb_get_retry 3
  75.         delay_before_retry 2
  76.         connect_port 80
  77.         }
  78.     }
  79.     real_server 192.168.1.68 80 {
  80.         weight 3
  81.         TCP_CHECK {
  82.         connect_timeout 30
  83.         nb_get_retry 3
  84.         delay_before_retry 2
  85.         connect_port 80
  86.         }
  87.      }
  88.  }
  89. [root@WEB ~]#
  90. [root@WEB ~]# service ipvsadm start
  91. [root@WEB ~]# service keepalived start
  92.  
  93. 注意：
  94. echo "1" > /proc/sys/net/ipv4/ip_forward
  95.  
  96. 二、实际服务器端的操作
  97. 将网关设置为lanvip的地址192.168.1.88
  98.  
  99. 三、lvs查看
  100.  
  101. ipvsadm -ln
  102. ipvsadm -lnc
  103. ipvsadm -l -n --stats
  104.  
  105. 调度算法：rr|wrr|lc|wlc|lblc|lblcr|dh|sh|sed|nq
  106. ======================================================================================
  107. TUN模式:
  108. ======================================================================================
  109. 一、仅lvs服务器端安装
  110. yum install ipvsadm openssl-devel popt popt-devel libnl-devel
  111. cd /opt/src/
  112. tar xzvf keepalived-1.2.7.tar.gz
  113. cd keepalived-1.2.7
  114. ./configure
  115. make && make install
  116. cp /usr/local/etc/rc.d/init.d/keepalived /etc/rc.d/init.d/
  117. cp /usr/local/etc/sysconfig/keepalived /etc/sysconfig/
  118. mkdir /etc/keepalived
  119. cp /usr/local/etc/keepalived/keepalived.conf /etc/keepalived/
  120. cp /usr/local/sbin/keepalived /usr/sbin/
  121.  
  122. 修改/etc/keepalived/keepalived.conf文件
  123. [root@WEB ~]# cat /etc/keepalived/keepalived.conf
  124. ! Configuration File for keepalived
  125.  
  126. global_defs {
  127.    notification_email {
  128.      123@123.com
  129.    }
  130.    notification_email_from 123@123.com
  131.    smtp_server mail.123.com
  132.    smtp_connect_timeout 30
  133.    router_id LVS_DEVEL
  134. }
  135.  
  136. vrrp_instance VI_1 {
  137.     state MASTER
  138.     interface eth0
  139.     virtual_router_id 52
  140.     priority 100
  141.     advert_int 1
  142.     authentication {
  143.         auth_type PASS
  144.         auth_pass 1111
  145.     }
  146.     virtual_ipaddress {
  147.        192.168.1.88
  148.     }
  149. }
  150. virtual_server 192.168.1.88 80 {
  151.     delay_loop 6
  152.     lb_algo lc
  153.     lb_kind TUN
  154.     persistence_timeout 60
  155.     protocol TCP
  156.  
  157.     real_server 192.168.2.18 80 {
  158.         weight 3
  159.         TCP_CHECK {
  160.         connect_timeout 30
  161.         nb_get_retry 3
  162.         delay_before_retry 2
  163.         connect_port 80
  164.         }
  165.     }
  166.     real_server 192.168.3.68 80 {
  167.         weight 3
  168.         TCP_CHECK {
  169.         connect_timeout 30
  170.         nb_get_retry 3
  171.         delay_before_retry 2
  172.         connect_port 80
  173.         }
  174.      }
  175.  }
  176. [root@WEB ~]#
  177. [root@WEB ~]# service ipvsadm start
  178. [root@WEB ~]# service keepalived start
  179.  
  180. 注意：
  181. 打开转发或关闭，dr/tun模式无影响
  182. echo "1" > /proc/sys/net/ipv4/ip_forward
  183.  
  184. 二、实际服务器端的操作
  185. [root@]# cat /usr/local/vip_tun.sh
  186. #!/bin/bash
  187. #srcipt to start LVS TUN realserver
  188.  
  189. VIP=192.168.1.88
  190. case "$1" in
  191.  
  192. start)
  193. #start LVS-TUN real server on this machine
  194. echo 1 >/proc/sys/net/ipv4/conf/tunl0/arp_ignore
  195. echo 2 >/proc/sys/net/ipv4/conf/tunl0/arp_announce
  196. echo 1 >/proc/sys/net/ipv4/conf/all/arp_ignore
  197. echo 2 >/proc/sys/net/ipv4/conf/all/arp_announce
  198. echo 0 >/proc/sys/net/ipv4/conf/tunl0/rp_filter
  199. echo 0 >/proc/sys/net/ipv4/conf/all/rp_filter
  200. sysctl -p >/dev/null 2>&1
  201. /sbin/modprobe ipip
  202. /sbin/ifconfig tunl0 $VIP broadcast $VIP netmask 255.255.255.255  up
  203. /sbin/route add -host $VIP dev tunl0
  204. /sbin/ifconfig eth0 mtu 1440
  205.  
  206. ;;
  207. stop)
  208. #stop lvs-TUN real server loopback device
  209. echo 0 > /proc/sys/net/ipv4/conf/tunl0/arp_ignore
  210. echo 0 > /proc/sys/net/ipv4/conf/tunl0/arp_announce
  211. echo 1 > /proc/sys/net/ipv4/conf/tunl0/rp_filter
  212. echo 0 > /proc/sys/net/ipv4/conf/all/arp_ignore
  213. echo 0 > /proc/sys/net/ipv4/conf/all/arp_announce
  214. echo 1 > /proc/sys/net/ipv4/conf/all/rp_filter
  215. /sbin/ifconfig tunl0 down
  216. /sbin/modprobe -r ipip
  217. /sbin/ifconfig eth0 mtu 1500
  218.  
  219. ;;
  220. status)
  221. islothere='/sbin/ifconfig tunl0 |grep $VIP'
  222. isrothere='netstat -rn |grep "tunl0"|grep $VIP'
  223. if [ ! "$islothere" -o ! "$isrothere" ];then
  224. echo "LVS-TUN real server stopped"
  225. else echo "LVS-TUN Running"
  226. fi
  227. ;;
  228. *)
  229. echo "$0: Usage: $0 {start|stop|status}"
  230. exit 1
  231. ;;
  232. esac
  233. [root@localhost ~]#  /usr/local/vip.sh start|stop|status
  234.  
  235. 三、lvs查看
  236.  
  237. ipvsadm -ln
  238. ipvsadm -lnc
  239. ipvsadm -l -n --stats
  240.  
  241. 调度算法：rr|wrr|lc|wlc|lblc|lblcr|dh|sh|sed|nq
  242. ======================================================================================
  243. DR模式:
  244. ======================================================================================
  245. 一、仅lvs服务器端安装
  246. yum install ipvsadm openssl-devel popt popt-devel libnl-devel
  247. cd /opt/src/
  248. tar xzvf keepalived-1.2.7.tar.gz
  249. cd keepalived-1.2.7
  250. ./configure
  251. make && make install
  252. cp /usr/local/etc/rc.d/init.d/keepalived /etc/rc.d/init.d/
  253. cp /usr/local/etc/sysconfig/keepalived /etc/sysconfig/
  254. mkdir /etc/keepalived
  255. cp /usr/local/etc/keepalived/keepalived.conf /etc/keepalived/
  256. cp /usr/local/sbin/keepalived /usr/sbin/
  257.  
  258. 修改/etc/keepalived/keepalived.conf文件
  259. [root@WEB ~]# cat /etc/keepalived/keepalived.conf
  260. ! Configuration File for keepalived
  261.  
  262. global_defs {
  263.    notification_email {
  264.  
  265.      123@123.com
  266.    }
  267.    notification_email_from 123@123.com
  268.    smtp_server mail.123.com
  269.    smtp_connect_timeout 30
  270.    router_id LVS_DEVEL
  271. }
  272.  
  273. vrrp_instance VI_1 {
  274.     state MASTER
  275.     interface eth0
  276.     virtual_router_id 52
  277.     priority 100
  278.     advert_int 1
  279.     authentication {
  280.         auth_type PASS
  281.         auth_pass 1111
  282.     }
  283.     virtual_ipaddress {
  284.        192.168.1.88
  285.     }
  286. }
  287. virtual_server 192.168.1.88 80 {
  288.     delay_loop 6
  289.     lb_algo lc
  290.     lb_kind DR
  291.     persistence_timeout 60
  292.     protocol TCP
  293.  
  294.     real_server 192.168.1.18 80 {
  295.         weight 3
  296.         TCP_CHECK {
  297.         connect_timeout 30
  298.         nb_get_retry 3
  299.         delay_before_retry 2
  300.         connect_port 80
  301.         }
  302.     }
  303.     real_server 192.168.1.68 80 {
  304.         weight 3
  305.         TCP_CHECK {
  306.         connect_timeout 30
  307.         nb_get_retry 3
  308.         delay_before_retry 2
  309.         connect_port 80
  310.         }
  311.      }
  312.  }
  313. [root@WEB ~]#
  314. [root@WEB ~]# service ipvsadm start
  315. [root@WEB ~]# service keepalived start
  316.  
  317. 注意：
  318. 打开转发或关闭，dr/tun模式无影响
  319. echo "1" > /proc/sys/net/ipv4/ip_forward
  320.  
  321. 二、实际服务器端的操作
  322. [root@localhost ~]# cat /usr/local/vip.sh
  323. #!/bin/bash
  324. # Script to start LVS DR real server.
  325. # description: LVS DR real server
  326. .  /etc/rc.d/init.d/functions
  327. VIP=192.168.1.88
  328. #host=`/bin/hostname`
  329. case "$1" in
  330. start)
  331.        # Start LVS-DR real server on this machine.
  332.         /sbin/ifconfig lo down
  333.         /sbin/ifconfig lo up
  334.         echo 1 > /proc/sys/net/ipv4/conf/lo/arp_ignore
  335.         echo 2 > /proc/sys/net/ipv4/conf/lo/arp_announce
  336.         echo 1 > /proc/sys/net/ipv4/conf/all/arp_ignore
  337.         echo 2 > /proc/sys/net/ipv4/conf/all/arp_announce
  338.         /sbin/ifconfig lo:0 $VIP broadcast $VIP netmask 255.255.255.255 up
  339.         /sbin/route add  $VIP dev lo:0
  340. ;;
  341. stop)
  342.         # Stop LVS-DR real server loopback device(s).
  343.         /sbin/ifconfig lo:0 down
  344.         echo 0 > /proc/sys/net/ipv4/conf/lo/arp_ignore
  345.         echo 0 > /proc/sys/net/ipv4/conf/lo/arp_announce
  346.         echo 0 > /proc/sys/net/ipv4/conf/all/arp_ignore
  347.         echo 0 > /proc/sys/net/ipv4/conf/all/arp_announce
  348. ;;
  349. status)
  350.         # Status of LVS-DR real server.
  351.         islothere=`/sbin/ifconfig lo:0 | grep $VIP`
  352.         isrothere=`netstat -rn | grep "lo:0" | grep $VIP`
  353.         if [ ! "$islothere" -o ! "isrothere" ];then
  354.             # Either the route or the lo:0 device
  355.             # not found.
  356.             echo "LVS-DR real server Stopped."
  357.         else
  358.             echo "LVS-DR real server Running."
  359.         fi
  360. ;;
  361. *)
  362.             # Invalid entry.
  363.             echo "$0: Usage: $0 {start|status|stop}"
  364.             exit 1
  365. ;;
  366. esac
  367. [root@localhost ~]#  /usr/local/vip.sh start|stop|status
  368.  
  369. 三、lvs查看
  370.  
  371. ipvsadm -ln
  372. ipvsadm -lnc
  373. ipvsadm -l -n --stats
  374.  
  375. 调度算法：rr|wrr|lc|wlc|lblc|lblcr|dh|sh|sed|nq
  376.  
  377. 注意：
  378.     1.TUN模式使用的IP都要是公网IP.
  379.     2.VIP的port要和后端realserver的port保持一致，但是不会影响VIP本机的port被其他服务使用.
  380.  
  381. 转载自：http://www.gaizaoren.com/archives/998
  382. 　　

　

附加：
LVS可以使用iptables同时做多个服务的负载均衡并实现持久化连接，使用iptables对包打上标签之后再进行匹配处理。配置如下：

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