Xenserver 虚拟机下配置LVS+keepalived

男娘i 2022-10-02 03:51 151阅读 0赞

测试环境：

思杰xenserver 5.5

与vmware 和真实机不一样需要安装kernel-xen并切换至Xen内核启动

之前是物理机配置。一路正常。今天却遇到了问题。所以做个记录。

测试机相关信息：

LVS-DR-Master 192.1.1.36

LVS-DR-BACKUP 192.1.1.37

LVS-DR-VIP  192.1.1.38

WEB1-Realserver 192.1.1.31

WEB2-Realserver 192.1.1.32

GateWay 192.1.1.1

一、系统配置

安装相应的包：yum -y install kernel-xen kernel-devel openssl openssl-devel

修改menu.lst文件：

1.  \# more /boot/grub/menu.lst
2.  \# grub.conf generated by anaconda
3.  \#
4.  \# Note that you do not have to rerun grub after making changes to this file
5.  \# NOTICE: You have a /boot partition. This means that
6.  \# all kernel and initrd paths are relative to /boot/, eg.
7.  \# root (hd0,0)
8.  \# kernel /vmlinuz-version ro root=/dev/xvda2
9.  \# initrd /initrd-version.img
10. \#boot=/dev/xvda
11. default=0
12. timeout=5
13. splashp\_w\_picpath=(hd0,0)/grub/splash.xpm.gz
14. hiddenmenu
15. \#title CentOS (2.6.18-128.1.10.el5.xs5.5.0.51xen)
16. \# root (hd0,0)
17. \# kernel /vmlinuz-2.6.18-128.1.10.el5.xs5.5.0.51xen ro root=LABEL=/ console=xvc0 rhgb quiet
18. \# initrd /initrd-2.6.18-128.1.10.el5.xs5.5.0.51xen.img
19. title CentOS (2.6.18-92.el5xen)
20. root (hd0,0)
21. kernel /vmlinuz-2.6.18-92.el5xen ro root=LABEL=/ console=xvc0 rhgb quiet
22. initrd /initrd-2.6.18-92.el5xen.img

\#uname -r

2.6.18-128.el5xen

\#ln -s /usr/src/kernels/2.6.18-128.el5xen-x86\_64/ /usr/src/linux

二、安装相应的包

\#mkdir /usr/local/src/lvs

\#cd /usr/local/src/lvs

\#wget [http://www.linuxvirtualserver.org/software/kernel-2.6/ipvsadm-1.24.tar.gz][http_www.linuxvirtualserver.org_software_kernel-2.6_ipvsadm-1.24.tar.gz]

\#wget [http://www.keepalived.org/software/keepalived-1.1.15.tar.gz][http_www.keepalived.org_software_keepalived-1.1.15.tar.gz]

1.  \#lsmod |grep ip\_vs
2.  \#tar zxvf ipvsadm-1.24.tar.gz
3.  \#cd ipvsadm-1.24
4.  \#make && make install
5.  \#find / -name ipvsadm \# 查看ipvsadm的位置
6.  
7.  \#tar zxvf keepalived-1.1.15.tar.gz
8.  \#cd keepalived-1.1.15
9.  \#./configure && make && make install
10. \#find / -name keepalived \# 查看keepalived位置
11. \#cp /usr/local/etc/rc.d/init.d/keepalived /etc/rc.d/init.d/
12. \#cp /usr/local/etc/sysconfig/keepalived /etc/sysconfig/
13. \#mkdir /etc/keepalived
14. \#cp /usr/local/etc/keepalived/keepalived.conf /etc/keepalived/
15. \#cp /usr/local/sbin/keepalived /usr/sbin/
16. \#service keepalived start|stop \# 做成系统启动服务方便管理.

三、配置keepalived

1.  ! Configuration File for keepalived
2.  
3.  global\_defs \{
4.  router\_id LVS\_DEVEL
5.  \}
6.  
7.  vrrp\_sync\_group VGM \{
8.  group \{
9.  VI\_OUT1
10. \}
11. \}
12. 
13. \#vip1
14. vrrp\_instance VI\_OUT1 \{
15. state MASTER
16. interface eth0
17. virtual\_router\_id 51
18. priority 100
19. advert\_int 1
20. authentication \{
21. auth\_type PASS
22. auth\_pass 1111
23. \}
24. virtual\_ipaddress \{
25. 192.1.1.38
26. \}
27. \}
28. 
29. virtual\_server 192.1.1.38 80 \{
30. delay\_loop 6
31. lb\_algo rr
32. lb\_kind DR
33. persistence\_timeout 50
34. protocol TCP
35. 
36. real\_server 192.1.1.31 80 \{
37. weight 100
38. TCP\_CHECK \{
39. connect\_timeout 3
40. nb\_get\_retry 3
41. delay\_before\_retry 3
42. connect\_port 80
43. \}
44. \}
45. 
46. real\_server 192.1.1.32 80 \{
47. weight 100
48. TCP\_CHECK \{
49. connect\_timeout 3
50. nb\_get\_retry 3
51. delay\_before\_retry 3
52. connect\_port 80
53. \}
54. \}
55. \}

Backup 机器的keepalived需要修改：

State BACKUP

weight 10数值比master小即可

四、客户端绑定VIP

脚本：

1.  \#vi /usr/local/sbin/realserver.sh
2.  \#!/bin/bash
3.  SNS\_VIP=192.1.1.38 （只需要修改此处）
4.  . /etc/rc.d/init.d/functions
5.  
6.  case "$1" in
7.  start)
8.  ifconfig lo:0 $SNS\_VIP netmask 255.255.255.255 broadcast $SNS\_VIP
9.  /sbin/route add \-host $SNS\_VIP dev lo:0
10. echo "1" >/proc/sys/net/ipv4/conf/lo/arp\_ignore
11. echo "2" >/proc/sys/net/ipv4/conf/lo/arp\_announce
12. echo "1" >/proc/sys/net/ipv4/conf/all/arp\_ignore
13. echo "2" >/proc/sys/net/ipv4/conf/all/arp\_announce
14. sysctl -p >/dev/null 2>&1
15. echo "RealServer Start OK"
16. ;;
17. stop)
18. ifconfig lo:0 down
19. route del $SNS\_VIP >/dev/null 2>&1
20. echo "0" >/proc/sys/net/ipv4/conf/lo/arp\_ignore
21. echo "0" >/proc/sys/net/ipv4/conf/lo/arp\_announce
22. echo "0" >/proc/sys/net/ipv4/conf/all/arp\_ignore
23. echo "0" >/proc/sys/net/ipv4/conf/all/arp\_announce
24. echo "RealServer Stoped"
25. ;;
26. \*)
27. echo "Usage: $0 \{start|stop\}"
28. exit 1
29. esac
30. exit 0

五、测试客户端绑定VIP

启动脚本。使用ip a 查看是否在lo绑定了VIP 停止后消失。

六、启动master backup 的keepalived查看日志。是否正常。

启动客户端apache 定义一个index.html 即可测试

本文不写测试过程。

就是停WEB1 再停WEB2 再停master看backup是否接管

七、错误

之前是在真实机上搞、一步没有出错。今天在Xenserver上需要注意一定要切到Xen内核启动。

由于配置客户端apache时。习惯性指定了listen IP：80 这是个错误。

原因：客户端绑定VIP后。监听127.0.0.1 80 用这个与LVS端进行通讯。

如果指定IP需要加上127 要不然就会出现拒绝请求的错误。

这个问题折腾了我一下午。在秋香的帮助下得到解决。低级错误了。长记性了。

参考：linuxtone sery.blog.51cto.com

转载于:https://blog.51cto.com/liuyu/291947

[http_www.linuxvirtualserver.org_software_kernel-2.6_ipvsadm-1.24.tar.gz]: http://www.linuxvirtualserver.org/software/kernel-2.6/ipvsadm-1.24.tar.gz
[http_www.keepalived.org_software_keepalived-1.1.15.tar.gz]: http://www.keepalived.org/software/keepalived-1.1.15.tar.gz