结合keepalived实现lvs的高可用群集故障自动转移
直上干活dr1上keepalived的配置:/etc/keepalived/keepalived.confglobal_defs { router_id LVS1 # 设置lvs的id，在一个网络内应该是唯一的}vrrp_sync_group test { #设置vrrp组 group { loadbalance }}vrrp_instance loadbalance { state MASTER #设置lvs的状态，报错MASTER和BACKUP两种，必须大写 interface eth0 #设置对外服务的接口 lvs_sync_daemon_inteface eth0 #设置lvs监听的接口 virtual_router_id 51 #设置虚拟路由表示 priority 180 #设置优先级，数值越大，优先级越高 advert_int 1 #设置同步时间间隔 authentication { #设置验证类型和密码 auth_type PASS auth_pass 1111 } virtual_ipaddress { 192.168.56.200 }}virtual_server 192.168.56.200 80 { delay_loop 6 #健康检查时间间隔 lb_algo rr #负载均衡调度算法 lb_kind DR #负载均衡转发规则 #persistence_timeout 20#设置会话保持时间，对bbs等很有用 protocol TCP #协议 real_server 192.168.56.105 80 { weight 3 #设置权重 TCP_CHECK { connect_timeout 3 nb_get_retry 3 delay_before_retry 3 connect_port 80 } } real_server 192.168.56.106 80 { weight 3 TCP_CHECK { connect_timeout 3 nb_get_retry 3 delay_before_retry 3 connect_port 80 } }}dr2上keepalived的配置/etc/keepalived/keepalived.conf
global_defs { router_id LVS2}vrrp_sync_group test { group { loadbalance }}vrrp_instance loadbalance { state BACKUP interface eth0 lvs_sync_daemon_inteface eth0 virtual_router_id 51 priority 150 advert_int 1 authentication { auth_type PASS auth_pass 1111 } virtual_ipaddress { 192.168.56.200 }}virtual_server 192.168.56.200 80 { delay_loop 6 lb_algo rr lb_kind DR #persistence_timeout 20 protocol TCP real_server 192.168.56.105 80 { weight 3 TCP_CHECK { connect_timeout 3 nb_get_retry 3 delay_before_retry 3 connect_port 80 } } real_server 192.168.56.106 80 { weight 3 TCP_CHECK { connect_timeout 3 nb_get_retry 3 delay_before_retry 3 connect_port 80 } }}}
启动dr1上的keepalivedkeepalived -f /etc/keepalived/keepalived.conf查看信息
然后启动dr2上keepalivedkeepalived -f /etc/keepalived/keepalived.conf查看信息
在realserver1与realserver2上分别执行下面的脚本
/home/lhb/sh/rs.sh#!/bin/bashvip=192.168.56.200ifconfig lo:0 $vip netmask 255.255.255.255route add -host $vip dev lo:0route -necho "1" >/proc/sys/net/ipv4/conf/lo/arp_ignoreecho "2" >/proc/sys/net/ipv4/conf/lo/arp_announceecho "1" >/proc/sys/net/ipv4/conf/all/arp_ignoreecho "2" >/proc/sys/net/ipv4/conf/all/arp_announce#sysctl -p#查看sysctl的配置变化，可不执行
然后我们开一个客户端方位vip：
在dr1上执行ipvsadm -ln
然后我们在dr1上关闭keepalived
这是我们继续访问vip,访问正常如图所示:
访问正常，说明web业务没有停止：由此推断我们的dr2已经开始接管业务了.然后到dr2上看一下信息:
说明故障发生时，业务服务已经自动从dr1转移到dr2上了。然后当我们的dr1修复好后，我们执行keepalived -f /etc/keepalived/keepalived.conf
此时访问vip,业务仍然正常访问.回到dr2上看信息
到此为止，keepalived实现lvs的故障在主备机自动切换已经展示完毕。
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