keepalived编译安装配置自启动

1、Centos配置Keepalived 做双机热备切换分类:网站架构2009-07-25 13:53 7823人阅读评论(0 收藏举报centosserverdelayauthenticationsnscompilerKeepalived系统环境:*两台服务器都装了CentOS-5.2-x86_64系统Virtual IP: 0Squid1+Real Server 1:网卡地址(eth0:2Squid2+Real Server 2:网卡地址(eth0:3*软件列表:keepalivedhttp:/www.keepalived

2、.org/software/keepalived-1.1.17.tar.gzopenssl-develyum -y install openssl-devel*配置:配置基于高可用keepalived,确定LVS使用DR模式1.安装配置keepalived1.1安装依赖软件如果系统为基本文本安装,需要安装一下软件# yum -y install ipvsadm# yum -y install kernel kernel-devel# reboot 重启系统切换内核# yum -y install openssl-devel ;安装keepalived依赖软件#ln -s /usr/src/ke

3、rnels/uname -r-uname -m/ /usr/src/linux;建立内核链接,编译keepalived支持lvs时需要注意建立链接的内核名和当前运行的内核一致,否则导致安装失败#tar zxvf keepalived-1.1.17.tar.gz#cd keepalived-1.1.17#./configure -prefix=/usr -sysconf=/etcKeepalived configuration-Keepalived version : 1.1.17Compiler : gccCompiler flags : -g -O2Extra Lib : -lpopt -l

4、ssl -lcryptoUse IPVS Framework : Yes ;注意编译时一定要支持lvsIPVS sync daemon support : YesUse VRRP Framework : YesUse LinkWatch : NoUse Debug flags : No#make#make install1.2编辑keepalived配置文件#Vi /etc/keepalived/keepalived.confglobal_defs notification_email testnotification_email_from rootlocalhostsmtp_server 1

5、smtp_connect_timeout 30router_id LVS_DEVELvrrp_instance VI_1 state MASTER #备份服务器上将MASTER改为BACKUPinterface eth0 # HA 监测网络接口virtual_router_id 51 #主、备机的virtual_router_id必须相同priority 100 #主、备机取不同的优先级,主机值较大,备份机值较小 advert_int 2 # VRRP Multicast 广播周期秒数authentication auth_type PASS #VRRP 认证方式auth_pa

6、ss 1111 #VRRP 口令字virtual_ipaddress 0 # VRRP HA 虚拟地址如果有多个VIP,继续换行填写 virtual_server 0 80 delay_loop 2 #每隔6秒查询realserver状态lb_algo rr #lvs 算法lb_kind DR #Direct Routepersistence_timeout 50 #同一IP 的连接60 秒内被分配到同一台realserverprotocol TCP #用TCP协议检查realserver状态real_server 2 8

7、0 weight 3 #(权重TCP_CHECK connect_timeout 10 #(10秒无响应超时nb_get_retry 3delay_before_retry 3connect_port 80real_server 3 80 weight 3 #(权重TCP_CHECK connect_timeout 10 #(10秒无响应超时nb_get_retry 3delay_before_retry 3connect_port 801.3BACKUP服务器同上配置,先安装lvs再按装keepalived,仍后配置/etc/keepalived/keepalived

8、.conf,只需将红色标示的部分改一下即可.global_defs notification_email testnotification_email_from rootlocalhostsmtp_server smtp_connect_timeout 30router_id LVS_DEVELvrrp_instance VI_1 state BACKUP #备份服务器上将MASTER改为BACKUPinterface eth0 # HA 监测网络接口virtual_router_id 51 #主、备机的virtual_router_id必须相同priority 99 #主、

9、备机取不同的优先级,主机值较大,备份机值较小 advert_int 2 # VRRP Multicast 广播周期秒数authentication auth_type PASS #VRRP 认证方式auth_pass 1111 #VRRP 口令字virtual_ipaddress 0 # VRRP HA 虚拟地址virtual_server 0 80 delay_loop 2 #每隔6秒查询realserver状态lb_algo rr #lvs 算法lb_kind DR #Direct Routepersistence_timeout 50 #同

10、一IP 的连接60 秒内被分配到同一台realserver protocol TCP #用TCP协议检查realserver状态real_server 2 80 weight 3 #(权重TCP_CHECK connect_timeout 10 #(10秒无响应超时nb_get_retry 3delay_before_retry 3connect_port 80real_server 3 80 weight 3 #(权重TCP_CHECK connect_timeout 10 #(10秒无响应超时nb_get_retry 3delay_befor

11、e_retry 3connect_port 802. 配置lvs客户端脚本c-sharpview plaincopyprint?1.#vi /usr/local/sbin/realserver.sh2. #!/bin/bash3. # description: Config realserver lo and apply noarp4. #Written by :NetSeek 5. 6. 7. 8. 9. 10. case "$1" in 11. start 12. 13. 14. 15. 16. 17. 18. 19. 20

12、. 21. 22. stop 23. 24. 25. 26. 27. 28. 29. 30. 31. * 32. 33. 34. esac 35. 36. exit 0 echo "Usage: $0 start|stop" exit 1 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/con

13、f/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" ; ; ifconfig lo:0 $SNS_VIP netmask 55 broadcast $SNS_VIP /sbin/route add -host $SNS_VIP dev lo:0 echo "

14、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 Sta

15、rt OK" . /etc/rc.d/init.d/functions SNS_VIP=0 或者采用 secondary ip address 方式配置 # vi /etc/sysctl.conf net.ipv4.conf.lo.arp_ignore = 1 net.ipv4.conf.lo.arp_announce = 2 net.ipv4.conf.all.arp_ignore = 1 net.ipv4.conf.all.arp_announce = 2 #sysctl -p #ip addr add 0/32 dev lo #i

16、p add list 查看是否绑定 3. 启动 lvs-dr 脚本和 realserver 启本，在 DR 上可以查看 LVS 当前状态: #watch ipvsadm -ln 4. 启动 keepalived 服务 #service httpd start #/etc/init.d/keepalived start 查看 keepalived 的安装位置： # find / -name keepalived 将 keepalived 作为服务添加到 chkconfig 中，并设置开机启动 # chkconfig -add keepalived # chkconfig -level 35 keepalived on # chkconfig -list keepalived keepalived 用 6:关闭 0:关闭 1:关闭 2:关闭 3:启用 4:关闭 5:启 “各等级”包括 2、3、4、5 等级 等级 0 表示：表示关机 等级 1 表示：单用户模式 等级 2 表示：无网络连接的多用户命令行模式 等级 3 表示：有网络连接的多用户命令行模式 等级 4 表示：不可用 等级 5 表示：带图形界面的多用户模式 等级 6 表示：重新启动 5. 测试 lvs