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ubuntu LVS+keepalived 笔记

2016-02-21 17:26 169 查看

环境：

虚拟机系统：Ubuntu 12.04

hostnameip
LVSMastereth0:192.168.31.198
eth1:10.10.100.100
LVSBackupeth0:192.168.31.197
eth1:10.10.100.101		LVS 备机
RealserverNet1eth0:10.10.100.53真实机器 lvs net模式
RealserverNet2eth0:10.10.100.54真实机器 lvs net模式
RealserverDR1eth0:192.168.31.186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 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.conf
vim /etc/keepalived/keepalived.conf


只用修改

state BACKUP

priority 90

! 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

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 #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 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/

模拟master出问题

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
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标签：  ubuntu lvs keepalived 负载均衡
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