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LVS DR + keepalived自动化配置脚本

分类： LINUX

2012-05-08 10:18:53

这个是按照目前网上的配置方法写的，但看过Redhat的配置说明后，发现这个不是很好，建议各位去看我的另一篇文章，这篇文章暂时保留在这里，毕竟是辛苦弄出来的。另一篇：http://blog.chinaunix.net/uid-26683919-id-3219775.html
 

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  1. #!/bin/sh
  2. #文 件 名: autogen_lvs.sh
  3. #功 能: 自动生成LVS,Keepalived配置文件,生成环境自动部署,自动运行脚本等
  4. #创建时间: 2012-02-05
  5. #自动化生成的文件列表:
  6. #(执行该脚本后,会生成autogen_lvs目录，里面会存放自动生成的相关文件)
  7. #1. ConfigAllServer.sh 配置相关服务器集群功能脚本，包括负载均衡主服务器，负载均衡备服务器，真实服务器
  8. #2. RunAllServer.sh 开启所有Server集群功能，包括负载均衡主备服务器，真实服务器
  9. #3. StopAllServer.sh 关闭所有Server集群功能，包括负载均衡主备服务器，真实服务器
  10. #4. LVSServer.sh 开启或关闭负载均衡器集群功能，该文件会被ConfigAllServer.sh部署到负载主备服务器的/etc/ha.d/下，供后续使用
  11. #5. RealServer.sh 开启或关闭真实服务器集群功能，该文件会被ConfigAllServer.sh部署到真实服务器的/etc/下，供后续使用
  12. #6. keepalvied_master.conf 文件会被ConfigAllServer.sh部署到负载主服务器的/etc/keepalived/下，并重命名为keepalived.conf，作为HA配置
  13. #7. keepalvied_backup.conf 文件会被ConfigAllServer.sh部署到负载备服务器的/etc/keepalived/下，并重命名为keepalived.conf，作为HA配置
  14. #注意事项
  15. #1. 执行ConfigAllServer.sh, RunAllServer.sh, StopAllServer.sh这三个脚本的主机需要修改/etc/ssh/ssh_config,将StrictHostKeyChecking设置为no,防止弹出提示框引起自动化无法执行完毕
  16. #2. 执行该脚本的机子上需要安装expect
  17. #3. lvs和keepalived软件需要预先安装好

  19. # -------------------------------------------------以下根据实际情况进行设定----------------------------------------------------
  20. # ROOT权限密码,该密码为所有负载均衡服务器,真实服务器的通用密码,所有服务器ROOT将使用统一密码,便于自动化控制，否则上面提到的ConfigAllServer.sh, RunAllServer.sh, StopAllServer.sh这三个文件无法正常运行
  21. ROOTPASSWORD=123qwe
  22. # 负载均衡主服务器IP地址
  23. LVS_SERVER_IP=192.168.254.3
  24. # 负载均衡备服务器IP地址
  25. LVS_BACKUP_SERVER_IP=192.168.254.4
  26. # 虚拟IP地址,对外提供服务的地址
  27. VIP=192.168.254.2
  28. # 广播地址
  29. BROADCAST=192.168.255.255
  30. # 网关,也就是路由器对内地址
  31. GATEWAY=192.168.0.2
  32. # 真实服务器数组,数据之间用空格隔开
  33. # 如'10.0.0.1 10.0.0.2' 表示10.0.0.1和10.0.0.2
  34. # 如'10 10.0.0.1' 表示10.0.0.1, 10.0.0.2, ..., 10.0.0.10
  35. RS_IPS='192.168.254.10 192.168.254.11'
  36. # 真实服务器业务对外提供服务的端口数组,数据之间用空格隔开,如'80 81'
  37. RS_PORTS='3306'
  38. #--------------------------------------------------------------------------------------------------------------------------------

  40. rm -fr ./autogen_lvs
  41. mkdir ./autogen_lvs

  43. first_string=`echo $RS_IPS | cut -d " " -f1`
  44. if [[ `echo $first_string | grep "\." | wc -l` = "0" ]];then
  45.     IP_NUM=$first_string
  46.     IP_START=`echo $RS_IPS | cut -d " " -f2 | awk 'BEGIN{ FS="." } { printf "%s.%s.%s.", $1, $2, $3}' `
  47.     OFFSET=`echo $RS_IPS | cut -d " " -f2 | cut -d "." -f4`
  48.     RS_IPS=
  49.     for((i=0;i<$IP_NUM;i++));do
  50.         RS_IPS=$RS_IPS" $IP_START`expr $OFFSET + $i`"
  51.     done
  52. fi

  54. LVS_CMD=
  55. for rs_port in $RS_PORTS;do
  56.     LVS_CMD=$LVS_CMD$'\t'$'\t'"ipvsadm -A -t $VIP:$rs_port -s wlc;"$'\n'
  57.     for rs_ip in $RS_IPS;do
  58.         LVS_CMD=$LVS_CMD$'\t'$'\t'"ipvsadm -a -t $VIP:$rs_port -r $rs_ip:$rs_port -g -w 1;"$'\n'
  59.     done
  60. done

  62. #Create lvs-dr.sh
  63. cat > ./autogen_lvs/lvs-dr.sh << end
  64. #!/bin/sh
  65. service iptables stop
  66. chkconfig iptables off
  67. chmod 777 /etc/rc.d/init.d/functions
  68. /etc/rc.d/init.d/functions
  69. case "\$1" in
  70.     start)
  71.         echo "start LVS of DirectorServer"
  72.         #Set the virtual IP Address
  73.         ifconfig eth0:1 $VIP broadcast $BROADCAST netmask 255.255.255.255 up
  74.         route add host $VIP dev eth0:1
  75.         #Clear IPVS Table
  76.         ipvsadm -C
  77.         #set LVS
  78.         
  79. $LVS_CMD
  80.         #Run LVS
  81.         ipvsadm
  82.         ;;
  83.     stop)
  84.         echo "close LVS Directorserver"
  85.         ipvsadm -C
  86.         ifconfig eth0:1 down
  87.         ;;
  88.     *)
  89.         echo "Usage: \$0 {start|stop}"
  90.         exit 1
  91. esac
  92. route del default gw $GATEWAY
  93. route add default gw $GATEWAY

  95. end

  97. #Create LVSServer.sh
  98. cat > ./autogen_lvs/LVSServer.sh << end
  99. #!/bin/sh
  100. service iptables stop
  101. chkconfig iptables off
  102. case "\$1" in
  103.     start)
  104.         /etc/init.d/keepalived start
  105.         ;;
  106.     stop)
  107.         /etc/init.d/keepalived stop
  108.         ;;
  109.     restart)
  110.         /etc/init.d/keepalived restart
  111.         ;;
  112.     *)
  113.         echo "Usage: \$0 {start|stop|restart}"
  114.         exit 1
  115. esac
  116. route del default gw $GATEWAY
  117. route add default gw $GATEWAY

  119. if ! grep LVSServer /etc/rc.local > /dev/null
  120. then
  121.         echo "sh /etc/LVSServer.sh start" >> /etc/rc.local
  122. fi

  124. end

  126. #Create RealServer.sh
  127. cat > ./autogen_lvs/RealServer.sh << end
  128. #!/bin/sh
  129. chmod 777 /etc/rc.d/init.d/functions
  130. /etc/rc.d/init.d/functions
  131. case "\$1" in
  132.     start)
  133.         echo "reparing for Real Server"
  134.         echo "1">/proc/sys/net/ipv4/conf/lo/arp_ignore
  135.         echo "2">/proc/sys/net/ipv4/conf/lo/arp_announce
  136.         echo "1">/proc/sys/net/ipv4/conf/all/arp_ignore
  137.         echo "2">/proc/sys/net/ipv4/conf/all/arp_announce
  138.         ifconfig lo:0 $VIP netmask 255.255.255.255 broadcast $BROADCAST up
  139.         route add -host $VIP dev lo:0
  140.         ;;
  141.     stop)
  142.         ifconfig lo:0 down
  143.         echo "0">/proc/sys/net/ipv4/conf/lo/arp_ignore
  144.         echo "0">/proc/sys/net/ipv4/conf/lo/arp_announce
  145.         echo "0">/proc/sys/net/ipv4/conf/all/arp_ignore
  146.         echo "0">/proc/sys/net/ipv4/conf/all/arp_announce
  147.         ;;
  148.     *)
  149.         echo "Usage: \$0 {start|stop}"
  150.         exit 1
  151. esac
  152. route del default gw $GATEWAY
  153. route add default gw $GATEWAY

  155. if ! grep RealServer /etc/rc.local > /dev/null
  156. then
  157.         echo "sh /etc/RealServer.sh start" >> /etc/rc.local
  158. fi

  160. end


  163. VIRTUAL_SERVER_LIST=
  164. for rs_port in $RS_PORTS;do
  165.     VIRTUAL_SERVER_LIST=$VIRTUAL_SERVER_LIST"virtual_server $VIP $rs_port {"$'\n'
  166.     VIRTUAL_SERVER_LIST=$VIRTUAL_SERVER_LIST$'\t'"delay_loop 6"$'\n'
  167.     VIRTUAL_SERVER_LIST=$VIRTUAL_SERVER_LIST$'\t'"lb_algo wlc"$'\n'
  168.     VIRTUAL_SERVER_LIST=$VIRTUAL_SERVER_LIST$'\t'"lb_kind DR"$'\n'
  169.     VIRTUAL_SERVER_LIST=$VIRTUAL_SERVER_LIST$'\t'"#persistence_timeout 60"$'\n'
  170.     VIRTUAL_SERVER_LIST=$VIRTUAL_SERVER_LIST$'\t'"protocol TCP"$'\n'
  171.     for rs_ip in $RS_IPS;do
  172.         VIRTUAL_SERVER_LIST=$VIRTUAL_SERVER_LIST$'\t'"real_server $rs_ip $rs_port {"$'\n'
  173.         VIRTUAL_SERVER_LIST=$VIRTUAL_SERVER_LIST$'\t'$'\t'"weight 1"$'\n'
  174.         VIRTUAL_SERVER_LIST=$VIRTUAL_SERVER_LIST$'\t'$'\t'"TCP_CHECK {"$'\n'
  175.         VIRTUAL_SERVER_LIST=$VIRTUAL_SERVER_LIST$'\t'$'\t'$'\t'"connect_timeout 10"$'\n'
  176.         VIRTUAL_SERVER_LIST=$VIRTUAL_SERVER_LIST$'\t'$'\t'$'\t'"nb_get_retry 3"$'\n'
  177.         VIRTUAL_SERVER_LIST=$VIRTUAL_SERVER_LIST$'\t'$'\t'$'\t'"delay_before_retry 3"$'\n'
  178.         VIRTUAL_SERVER_LIST=$VIRTUAL_SERVER_LIST$'\t'$'\t'$'\t'"connect_port $rs_port"$'\n'
  179.         VIRTUAL_SERVER_LIST=$VIRTUAL_SERVER_LIST$'\t'$'\t'"}"$'\n'
  180.         VIRTUAL_SERVER_LIST=$VIRTUAL_SERVER_LIST$'\t'"}"$'\n'
  181.     done
  182.     VIRTUAL_SERVER_LIST=$VIRTUAL_SERVER_LIST"}"$'\n'$'\n'
  183. done

  185. #Create keepalived_master.conf
  186. cat > ./autogen_lvs/keepalived_master.conf << end
  187. ! Configuration File for keepalived

  189. global_defs {
  190.    router_id LVS_DEVEL
  191. }

  193. vrrp_instance VI_1 {
  194.     state MASTER
  195.     interface eth0
  196.     virtual_router_id 51
  197.     priority 100
  198.     advert_int 1
  199.     authentication {
  200.         auth_type PASS
  201.         auth_pass 1111
  202.     }
  203.     virtual_ipaddress {
  204.         $VIP
  205.     }
  206. }

  208. $VIRTUAL_SERVER_LIST
  209. end

  211. #Create keepalived_backup.conf
  212. sed -e 's/state MASTER/state BACKUP/' -e 's/priority 100/priority 99/' ./autogen_lvs/keepalived_master.conf > ./autogen_lvs/keepalived_backup.conf

  214. SCP_LIST=
  215. for rs_ip in $RS_IPS;do
  216.     SCP_LIST=$SCP_LIST"if test_host_online $rs_ip;then"$'\n'
  217.     SCP_LIST=$SCP_LIST"/usr/bin/expect << endexpect"$'\n'
  218.     SCP_LIST=$SCP_LIST$'\t'"set timeout 10"$'\n'
  219.     SCP_LIST=$SCP_LIST$'\t'"spawn scp RealServer.sh root@$rs_ip:/etc/"$'\n'
  220.     SCP_LIST=$SCP_LIST$'\t'"expect \"*password*\""$'\n'
  221.     SCP_LIST=$SCP_LIST$'\t'"send \"$ROOTPASSWORD\r\""$'\n'
  222.     SCP_LIST=$SCP_LIST$'\t'"expect eof"$'\n'
  223.     SCP_LIST=$SCP_LIST"endexpect"$'\n'
  224.     SCP_LIST=$SCP_LIST"fi"$'\n'$'\n'
  225. done

  227. #Create ConfigAllServer.sh
  228. cat > ./autogen_lvs/ConfigAllServer.sh << end
  229. #!/bin/sh

  231. function test_host_online() {
  232.     if [[ \` ping \$1 -c 1 -w 1 | grep "1 received" | wc -l \` = "1" ]];then
  233.         return 0
  234.     else
  235.         return 1
  236.     fi
  237. }

  239. if test_host_online $LVS_SERVER_IP;then
  240. /usr/bin/expect << endexpect
  241.     set timeout 10
  242.     spawn scp LVSServer.sh root@$LVS_SERVER_IP:/etc/
  243.     expect "*password*"
  244.     send "$ROOTPASSWORD\r"
  245.     expect eof

  247.     spawn scp keepalived_master.conf root@$LVS_SERVER_IP:/etc/keepalived/keepalived.conf
  248.     expect "*password*"
  249.     send "$ROOTPASSWORD\r"
  250.     expect eof
  251. endexpect
  252. fi

  254. if test_host_online $LVS_BACKUP_SERVER_IP;then
  255. /usr/bin/expect << endexpect
  256.     set timeout 10
  257.     spawn scp LVSServer.sh root@$LVS_BACKUP_SERVER_IP:/etc/
  258.     expect "*password*"
  259.     send "$ROOTPASSWORD\r"
  260.     expect eof

  262.     spawn scp keepalived_backup.conf root@$LVS_BACKUP_SERVER_IP:/etc/keepalived/keepalived.conf
  263.     expect "*password*"
  264.     send "$ROOTPASSWORD\r"
  265.     expect eof
  266. endexpect
  267. fi
  268. $SCP_LIST
  269. end

  271. RUN_LIST=
  272. for rs_ip in $RS_IPS;do
  273.     RUN_LIST=$RUN_LIST"if test_host_online $rs_ip;then"$'\n'
  274.     RUN_LIST=$RUN_LIST"/usr/bin/expect << endexpect"$'\n'
  275.     RUN_LIST=$RUN_LIST$'\t'"set timeout 10"$'\n'
  276.     RUN_LIST=$RUN_LIST$'\t'"spawn ssh root@$rs_ip"$'\n'
  277.     RUN_LIST=$RUN_LIST$'\t'"expect \"*password*\""$'\n'
  278.     RUN_LIST=$RUN_LIST$'\t'"send \"$ROOTPASSWORD\r\""$'\n'
  279.     RUN_LIST=$RUN_LIST$'\t'"expect \"#\""$'\n'
  280.     RUN_LIST=$RUN_LIST$'\t'"send \"sh /etc/RealServer.sh start\r\""$'\n'
  281.     RUN_LIST=$RUN_LIST$'\t'"expect eof"$'\n'
  282.     RUN_LIST=$RUN_LIST$'\t'"send \"exit\r\""$'\n'
  283.     RUN_LIST=$RUN_LIST"endexpect"$'\n'
  284.     RUN_LIST=$RUN_LIST"fi"$'\n'$'\n'
  285. done
  286. #Create RunAllServer.sh
  287. cat > ./autogen_lvs/RunAllServer.sh << end
  288. #!/bin/sh

  290. function test_host_online() {
  291.     if [[ \` ping \$1 -c 1 -w 1 | grep "1 received" | wc -l \` = "1" ]];then
  292.         return 0
  293.     else
  294.         return 1
  295.     fi
  296. }

  298. $RUN_LIST
  299. if test_host_online $LVS_SERVER_IP;then
  300. /usr/bin/expect << endexpect
  301.     set timeout 10
  302.     spawn ssh root@$LVS_SERVER_IP
  303.     expect "*password*"
  304.     send "$ROOTPASSWORD\r"
  305.     expect "#"
  306.     send "sh /etc/LVSServer.sh start\r"
  307.     expect eof
  308.     send "exit\r"
  309. endexpect
  310. fi

  312. if test_host_online $LVS_BACKUP_SERVER_IP;then
  313. /usr/bin/expect << endexpect
  314.     set timeout 10
  315.     spawn ssh root@$LVS_BACKUP_SERVER_IP
  316.     expect "*password*"
  317.     send "$ROOTPASSWORD\r"
  318.     expect "#"
  319.     send "sh /etc/LVSServer.sh start\r"
  320.     expect eof
  321.     send "exit\r"
  322. endexpect
  323. fi

  325. end

  327. #Create StopAllServer.sh
  328. sed 's/start/stop/' ./autogen_lvs/RunAllServer.sh > ./autogen_lvs/StopAllServer.sh


 

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