ubuntu LVS+keepalived 笔记

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环境：

虚拟机系统：Ubuntu 12.04

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模式需要的VIP： 192.168.31.200
NET模式需要的VIP： 10.10.100.200

真实服务器配置

参照lvs 笔记

安装

LVSMaster和LVSBackup安装keepalived和lvs

apt-get install keepalivedapt-get install ipvsadm

lvs配置

LVSMaster配置文件

vim /etc/keepalived/keepalived.conf! Configuration File for keepalivedglobal_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一样，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, 两个节点设置必须一样        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，可以为{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，不然看不出效果    protocol TCP  #指定转发协议类型可以设置{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.confvim /etc/keepalived/keepalived.conf

只用修改
state BACKUP
priority 90

! Configuration File for keepalivedglobal_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

service keepalived start

测试

root@LVSMaster:~# ip a1: 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 forever2: 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 #现在序列IP在LVSMaster上       valid_lft forever preferred_lft forever    inet6 fe80::20c:29ff:fe2b:e971/64 scope link        valid_lft forever preferred_lft forever3: 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/

模拟master出问题

root@LVSMaster:~# service keepalived stop#vip已经没了root@LVSMaster:~# ip a1: 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 forever2: 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 forever3: 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 a1: 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 forever2: 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 forever3: 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

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