ubuntu LVS+keepalived 笔记

时间 2019-12-09

标签 ubuntu lvs+keepalived lvs keepalived 笔记栏目 Ubuntu 繁體版

原文原文链接

环境：

虚拟机系统：Ubuntu 12.04算法

hostname	ip
LVSMaster	eth0:192.168.31.198 eth1:10.10.100.100
LVSBackup	eth0:192.168.31.197 eth1:10.10.100.101	LVS 备机
RealserverNet1	eth0:10.10.100.53	真实机器 lvs net模式
RealserverNet2	eth0:10.10.100.54	真实机器 lvs net模式
RealserverDR1	eth0:192.168.31.186	真实机器 lvs dr模式

DR模式须要的VIP： 192.168.31.200
NET模式须要的VIP： 10.10.100.200vim

真实服务器配置

参照lvs 笔记服务器

安装

LVSMaster和LVSBackup安装keepalived和lvsmarkdown

apt-get install keepalived
apt-get install ipvsadm

lvs配置

LVSMaster配置文件

vim /etc/keepalived/keepalived.conf

! Configuration File for keepalived

global_defs {
   router_id LVSMaster
}

vrrp_instance VI_1 {
    state MASTER
    interface eth0 # 对外服务的网卡
    virtual_router_id 100 #VRRP组名，两个节点的设置必须同样，以指明各个节点属于同一VRRP组
    priority 100 #主节点的优先级（1-254之间），备用节点必须比主节点优先级低
    advert_int 1 #设置主备之间同步检查的时间间隔单位秒 
    authentication { #设置验证信息，两个节点必须一致
        auth_type PASS
        auth_pass 123456   
    } 
    virtual_ipaddress { #指定虚拟IP, 两个节点设置必须同样
        192.168.31.200
    }
}

#lvs NAT配置
virtual_server 192.168.31.200 80 {
    delay_loop 6
    lb_algo wrr #设置负载高度算法，wrr带权循环
    lb_kind NAT #设置LVS实现负载均衡的机制，能够为{NAT|TUN|DR}三种
    #persistence_timeout 50 #会话保持时间，单位为秒。动态网页session共享简单的决解办法。测试的时候注掉，否则看不出效果
    protocol TCP  #指定转发协议类型能够设置{TCP|UDP}两种

    real_server 10.10.100.53 80 { #真实的主机
        weight 10 #真实的主机的权重,数字越大，权重越高 
        TCP_CHECK { #设置检测Realserver的方式
            connect_timeout 3
            nb_get_retry 3
            delay_before_retry 3
            connect_port 80
        }
    }

    real_server 10.10.100.54 80 {
        weight 10
        TCP_CHECK {
            connect_timeout 3
            nb_get_retry 3
            delay_before_retry 3
            connect_port 80
        }
    }

}

#lvs DR配置
virtual_server 192.168.31.200 80 {
    delay_loop 6
    lb_algo wrr
    lb_kind DR
    persistence_timeout 50
    protocol TCP

    real_server 192.168.31.186 80 {
        weight 1
        TCP_CHECK {
            connect_timeout 3
            nb_get_retry 3
            delay_before_retry 3
            connect_port 80
        }
    }

}

LVSBackup配置文件

scp /etc/keepalived/keepalived.conf 10.10.100.101:/etc/keepalived/keepalived.conf
vim /etc/keepalived/keepalived.conf

只用修改
state BACKUP
priority 90session

! Configuration File for keepalived

global_defs { router_id LVSMaster }

vrrp_instance VI_1 { state BACKUP interface eth0 virtual_router_id 100 priority 90 advert_int 1 authentication { auth_type PASS auth_pass 123456 } 
    virtual_ipaddress { 192.168.31.200 }
}

virtual_server 192.168.31.200 80 { delay_loop 6 lb_algo wrr lb_kind NAT #persistence_timeout 50 protocol TCP real_server 10.10.100.53 80 { weight 10 TCP_CHECK { connect_timeout 3 nb_get_retry 3 delay_before_retry 3 connect_port 80 }
    }

    real_server 10.10.100.54 80 { weight 10 TCP_CHECK { connect_timeout 3 nb_get_retry 3 delay_before_retry 3 connect_port 80 }
    }

}

virtual_server 192.168.31.200 80 { delay_loop 6 lb_algo wrr lb_kind DR persistence_timeout 50 protocol TCP real_server 192.168.31.186 80 { weight 1 TCP_CHECK { connect_timeout 3 nb_get_retry 3 delay_before_retry 3 connect_port 80 }
    }
}

启动

master 和backup 启动 keepalived负载均衡

service keepalived start

测试

root@LVSMaster:~# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN 
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
    link/ether 00:0c:29:2b:e9:71 brd ff:ff:ff:ff:ff:ff
    inet 192.168.31.198/24 brd 192.168.31.255 scope global eth0
       valid_lft forever preferred_lft forever
    inet 192.168.31.200/32 scope global eth0 #如今序列IP在LVSMaster上
       valid_lft forever preferred_lft forever
    inet6 fe80::20c:29ff:fe2b:e971/64 scope link 
       valid_lft forever preferred_lft forever
3: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
    link/ether 00:0c:29:2b:e9:7b brd ff:ff:ff:ff:ff:ff
    inet 10.10.100.100/24 brd 10.10.100.255 scope global eth1
       valid_lft forever preferred_lft forever
    inet6 fe80::20c:29ff:fe2b:e97b/64 scope link 
       valid_lft forever preferred_lft forever

访问 http://192.168.31.200/ oop

模拟master出问题测试

root@LVSMaster:~# service keepalived stop
#vip已经没了
root@LVSMaster:~# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN 
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
    link/ether 00:0c:29:2b:e9:71 brd ff:ff:ff:ff:ff:ff
    inet 192.168.31.198/24 brd 192.168.31.255 scope global eth0
       valid_lft forever preferred_lft forever
    inet6 fe80::20c:29ff:fe2b:e971/64 scope link 
       valid_lft forever preferred_lft forever
3: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
    link/ether 00:0c:29:2b:e9:7b brd ff:ff:ff:ff:ff:ff
    inet 10.10.100.100/24 brd 10.10.100.255 scope global eth1
       valid_lft forever preferred_lft forever
    inet6 fe80::20c:29ff:fe2b:e97b/64 scope link 
       valid_lft forever preferred_lft forever

#vip在LVSBackup上
root@LVSBackup:~# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN 
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
    link/ether 00:0c:29:7f:11:bd brd ff:ff:ff:ff:ff:ff
    inet 192.168.31.197/24 brd 192.168.31.255 scope global eth0
       valid_lft forever preferred_lft forever
    inet 192.168.31.200/32 scope global eth0
       valid_lft forever preferred_lft forever
    inet6 fe80::20c:29ff:fe7f:11bd/64 scope link 
       valid_lft forever preferred_lft forever
3: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
    link/ether 00:0c:29:7f:11:c7 brd ff:ff:ff:ff:ff:ff
    inet 10.10.100.101/24 brd 10.10.100.255 scope global eth1
       valid_lft forever preferred_lft forever
    inet6 fe80::20c:29ff:fe7f:11c7/64 scope link 
       valid_lft forever preferred_lft forever