利用keepalvied实现负载均衡和和高可用性 -凯发app官方网站

! configuration file for keepalived
global_defs {
notification_email {
yhai_ying@163.com
}
notification_email_from sns-lvs@gmail.com
smtp_server 127.0.0.1
# smtp_connect_timeout 30
router_id lvs_devel
}
#written by :netseek
# vip1
vrrp_instance vi_1 {
state master #备份服务器上将master改为backup
interface eth0
virtual_router_id 51
priority 100 # 备份服务上将100改为99
advert_int 1
authentication {
auth_type pass
auth_pass 1111
}
virtual_ipaddress {
192.168.1.188
#(如果有多个vip，继续换行填写.)
}
}
virtual_server 192.168.1.188 80 {
delay_loop 6 #(每隔10秒查询realserver状态)
lb_algo wrr #(lvs 算法)
lb_kind dr #(direct route)
persistence_timeout 60 #(同一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 192.168.1.121 80 {
weight 3 #(权重)
tcp_check {
connect_timeout 10 #(10秒无响应超时)
nb_get_retry 3
        delay_before_retry 3
        connect_port 80
        }
    }
    real_server 192.168.1.122 80 {
        weight 3
        tcp_check {
        connect_timeout 10
        nb_get_retry 3
        delay_before_retry 3
        connect_port 80
        }
     }
}

[root@vm1 ~]# /etc/init.d/keepalived start

2.在lvs的backup节点上设置：
[root@vm4 ~]# yum install keepalived -y
[root@vm4 ~]# vim /etc/keepalived/keepalived.conf

点击(此处)折叠或打开

! configuration file for keepalived

global_defs {
   notification_email {
         yhai_ying@163.com
   }
   notification_email_from sns-lvs@gmail.com
   smtp_server 127.0.0.1
# smtp_connect_timeout 30
   router_id lvs_devel
}

#written by :netseek
# vip1
vrrp_instance vi_1 {
    state backup             #备份服务器上将master改为backup
    interface eth0
    virtual_router_id 51
    priority 99    # 备份服务上将100改为99
    advert_int 1
    authentication {
        auth_type pass
        auth_pass 1111
    }
    virtual_ipaddress {
        192.168.1.188
        #(如果有多个vip，继续换行填写.)
    }
}

virtual_server 192.168.1.188 80 {
    delay_loop 6                  #(每隔10秒查询realserver状态)
    lb_algo wrr                  #(lvs 算法)
    lb_kind dr                  #(direct route)
    persistence_timeout 60        #(同一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 192.168.1.121 80 {
        weight 3               #(权重)
        tcp_check {
        connect_timeout 10       #(10秒无响应超时)
        nb_get_retry 3
        delay_before_retry 3
        connect_port 80
        }
    }
    real_server 192.168.1.122 80 {
        weight 3
        tcp_check {
        connect_timeout 10
        nb_get_retry 3
        delay_before_retry 3
        connect_port 80
        }
     }
}

下面我们做个测试：
配置完成后我们停掉master上的keepalived服务然后去查看日志文件，看看backup节点是否接管服务：
[root@vm1 ~]# /etc/init.d/keepalived stop
stopping keepalived: [ ok ]
[root@vm1 ~]# tail -f /var/log/messages
apr 20 07:05:43 vm1 keepalived_vrrp[1163]: vrrp_instance(vi_1) transition to master state
apr 20 07:05:44 vm1 keepalived_vrrp[1163]: vrrp_instance(vi_1) entering master state
apr 20 07:05:44 vm1 keepalived_vrrp[1163]: vrrp_instance(vi_1) setting protocol vips.
apr 20 07:05:44 vm1 keepalived_vrrp[1163]: vrrp_instance(vi_1) sending gratuitous arps on eth0 for 192.168.1.188
apr 20 07:05:49 vm1 keepalived_vrrp[1163]: vrrp_instance(vi_1) sending gratuitous arps on eth0 for 192.168.1.188
apr 20 07:08:10 vm1 keepalived[1160]: stopping keepalived v1.2.7 (09/26,2012)
apr 20 07:08:10 vm1 keepalived_vrrp[1163]: vrrp_instance(vi_1) sending 0 priority
apr 20 07:08:10 vm1 keepalived_vrrp[1163]: vrrp_instance(vi_1) removing protocol vips.
apr 20 07:08:10 vm1 keepalived_healthcheckers[1162]: netlink reflector reports ip 192.168.1.188 removed
apr 20 07:08:10 vm1 kernel: ipvs: __ip_vs_del_service: enter
我们可以看到keepalived健康检查已经被移除。
再来看看backup的日志文件：
[root@vm4 ~]# tail -f /var/log/messages
apr 20 07:05:58 vm4 keepalived_healthcheckers[1180]: ipvs: destination already exists
apr 20 07:05:58 vm4 keepalived_healthcheckers[1180]: ipvs: destination already exists
apr 20 07:05:58 vm4 keepalived_healthcheckers[1180]: using linkwatch kernel netlink reflector...
apr 20 07:05:58 vm4 keepalived_healthcheckers[1180]: activating healthchecker for service [192.168.1.121]:80
apr 20 07:05:58 vm4 keepalived_healthcheckers[1180]: activating healthchecker for service [192.168.1.122]:80
apr 20 07:08:10 vm4 keepalived_vrrp[1181]: vrrp_instance(vi_1) transition to master state
apr 20 07:08:11 vm4 keepalived_vrrp[1181]: vrrp_instance(vi_1) entering master state
apr 20 07:08:11 vm4 keepalived_vrrp[1181]: vrrp_instance(vi_1) setting protocol vips.
apr 20 07:08:11 vm4 keepalived_vrrp[1181]: vrrp_instance(vi_1) sending gratuitous arps on eth0 for 192.168.1.188
apr 20 07:08:16 vm4 keepalived_vrrp[1181]: vrrp_instance(vi_1) sending gratuitous arps on eth0 for 192.168.1.188
之前backup节点一直在监视master的keepalived服务的状态，当master节点上健康检查出现故障的时候，backup自动接管服务。

阅读(9948) | 评论(0) | 转发(1) |

上一篇：lvs负载均衡的配置

给主人留下些什么吧！~~

| | | | |

感谢所有关心和支持过chinaunix的朋友们