| Keepalived+LVS | 您所在的位置：网站首页 › 拓扑图的概念 › Keepalived+LVS |
|
环境: 虚拟机:VMware Workstation 操作系统:CentOS 5.5 一、keepalived+lvs-DR模式配置高可用负载均衡 拓扑如下：
二、服务器ip配置信息 1. ip_lb 主机(master) :
2.ip_lb_2 主机 (backup)
3.web1 主机 4.web2 主机
三、在master和backup分别查看是否有ipvsadm软件 1. 检查ipvsadm是否安装成功.可以直接输入 [[email protected] ~]# ipvsadm IP Virtual Server version 1.2.1 (size=4096) Prot LocalAddress:Port Scheduler Flags -> RemoteAddress:Port Forward Weight ActiveConn InActConn 2. 检查模版是否加入内核 [[email protected] ~]# lsmod |grep ip_vs ip_vs 78081 0 四、分别在web1和web2上面安装apache服务. # 安装apache服务不说明了. 开放的端口是:8099 五、在master主机(192.168.96.2)和backup主机(192.168.96.22)上安装keepalived 1. keepalived-1.2.1.tar.gz # 解压这个文件并且安装 (tar -zxvf keepalived-1.2.1.tar.gz) 2. ./configure --prefix=/home/keepalived/ --with-kernel-dir=/usr/src/kernels/2.6.18-164.el5-i686 3.make 4.make install 5.配置文件的路径 cp /home/keepalived/etc/rc.d/init.d/keepalived /etc/init.d/ cp /home/keepalived/etc/sysconfig/keepalived /etc/sysconfig/ cp /home/keepalived/etc/keepalived/keepalived.conf /etc/keepalived/ cp /home/keepalived/sbin/keepalived /sbin/ 6.配置keepalived.conf文件.( ip_lb 主机 ) vim /etc/keepalived/keepalived.conf #global define global_defs { router_id LVS_T1 } vrrp_sync_group bl_group { group { bl_one } } vrrp_instance bl_one { state MASTER interface eth0 lvs_sync_daemon_interface eth0 virtual_router_id 38 priority 150 advert_int 3 authentication { auth_type PASS auth_pass 1111 } virtual_ipaddress { 192.168.96.100 } } virtual_server 192.168.96.100 8099 { delay_loop 3 lb_algo rr lb_kind DR persistence_timeout 1 protocol TCP real_server 192.168.96.33 8099 { weight 1 TCP_CHECK { connect_timeout 10 nb_get_retry 3 delay_before_retry 3 connect_port 8099 } } real_server 192.168.96.4 8099 { weight 1 TCP_CHECK { connect_timeout 10 nb_get_retry 3 delay_before_retry 3 connect_port 8099 } } } 7、配置keepalived.conf文件.(ip_lb_2 主机 ) vim /etc/keepalived/keepalived.conf #global define global_defs { router_id LVS_T2 } vrrp_sync_group bl_group { group { bl_one } } vrrp_instance bl_one { state BACKUP interface eth0 lvs_sync_daemon_interface eth0 virtual_router_id 38 priority 120 advert_int 3 authentication { auth_type PASS auth_pass 1111 } virtual_ipaddress { 192.168.96.100 } } virtual_server 192.168.96.100 8099 { delay_loop 3 lb_algo rr lb_kind DR persistence_timeout 1 protocol TCP real_server 192.168.96.33 8099 { weight 1 TCP_CHECK { connect_timeout 10 nb_get_retry 3 delay_before_retry 3 connect_port 8099 } } real_server 192.168.96.4 8099 { weight 1 TCP_CHECK { connect_timeout 10 nb_get_retry 3 delay_before_retry 3 connect_port 8099 } } } 8. 分别在主备上启动keepalived [[email protected]_lb home]# /etc/init.d/keepalived start Starting keepalived: [ OK ] [[email protected]_lb home]# tail -f /var/log/message # PS:这里说的LVS.并不是用ipvsadm软件配置.而是直接用keepalived的virtual_server配置项控制的. # 安装ipvsadm只是可以看到负载状况.其实只需要keepalived也可以实现负载均衡集群. 六、在web1和web2主机上配置LVS-DR的相关配置. 1. vim /etc/init.d/lvsDR_node （web1主机） #! /bin/sh # descript : start real server DR VIP=192.168.96.100 . /etc/rc.d/init.d/functions case "$1" in start) echo "start LVS of RealServer DR" /sbin/ifconfig lo:0 $VIP broadcast $VIP netmask 255.255.255.255 up echo "1" > /proc/sys/net/ipv4/conf/all/arp_ignore echo "2" > /proc/sys/net/ipv4/conf/all/arp_announce ;; stop) /sbin/ifconfig lo:0 down echo "close LVS of RealServer DR" echo "0" > /proc/sys/net/ipv4/conf/all/arp_ignore echo "0" > /proc/sys/net/ipv4/conf/all/arp_announce ;; *) echo "Usage : $0 {start|stop}" exit 1 esac 2. 把这个文件复制到web2主机上. 3. 在web1和web2上分别启动这个脚本: /etc/init.d/lvsDR_node start 七、web1和web2主机上开启httpd服务. /etc/init.d/httpd start # ================= TEST ======================================= 八、测试是否可以负载均衡. 编写测试脚本: #! /bin/sh for((i=1;i> /tmp/q; done 结果: 九、测试断开一个web服务或加入一个web服务 现在关闭 web2主机(192.168.96.4) 的web 服务.. 查看日志可以看到: 现在再把 web2主机(192.168.96.4)的web 服务加入进来: 查看日志可以看到: 十、 测试HA 现在模拟主(master)的keepalived主机死掉. 备机的日志文件: 可以看到备机的keepalived已经开始工作.... 整个部署就完成了. 官方参考中文文档:http://www.keepalived.org/pdf/sery-lvs-cluster.pdf |
| CopyRight 2018-2019 实验室设备网 版权所有 |