LVS负载均衡实现双向设备

LVS负载均衡实现双向热备

LVS1服务器配置

一、准备四台虚拟机

首先将四台虚拟机关闭防火墙

systemctl stop firewalld

iptabled -F

setenforce 0

第一台虚拟机

一、安装ipvsadm,keepalived

[root@localhost ~]# yum -y install ipvsadm

[root@localhost ~]# yum -y install keepalived

二、配置keepalived文件

[root@localhost ~]# cd /etc/keepalived/

[root@localhost keepalived]# ls

keepalived.conf

[root@localhost keepalived]# cp keepalived.conf keepalived.conf.bak

[root@localhost keepalived]# vim keepalived.conf

1 ! Configuration File for keepalived

3 global_defs {

4 notification_email {

5 [email protected]

6 }

7 notification_email_from [email protected]

8 smtp_server 192.168.200.1

9 smtp_connect_timeout 30

10 router_id LVS_MASTER

11 vrrp_skip_check_adv_addr

12 vrrp_strict

13 vrrp_garp_interval 0

14 vrrp_gna_interval 0

15 }

17 vrrp_instance VI_1 {

18 state MASTER

19 interface eno16777728

20 virtual_router_id 51

21 priority 100

22 advert_int 1

23 authentication {

24 auth_type PASS

25 auth_pass 1111

26 }

27 virtual_ipaddress {

28 192.168.200.16

29 192.168.200.17

30 192.168.200.18

31 }

32 }

34 virtual_server 192.168.200.254 80 {

35 delay_loop 6

36 lb_algo rr

37 lb_kind DR

38 protocol TCP

40 real_server 192.168.200.14 80 {

41 weight 1

42 TCP_CHECK {

43 connect_timeout 3

44 nb_get_retry 3

45 delay_before_retry 3

46 connect_port 80

47 }

48 real_server 192.168.200.15 80 {

49 weight 1

50 TCP_CHECK {

51 connect_timeout 3

52 nb_get_retry 3

53 delay_before_retry 3

54 connect_port 80

55 }

56 }

三、启动keepalived服务

[root@localhost ~]# systemctl start keepalived

四、查看VIP

ifconfig eno16777728:0 192.168.200.254 netmask 255.255.255.0

ifconfig eno16777728:0

[root@localhost ~]# ip a

五、查看策略

[root@localhost ~]# ipvsadm -A -t 192.168.200.253:80 -s rr

[root@localhost ~]# ipvsadm -a -t 192.168.200.253:80 -r 192.168.200.14:80 -g -w 1

[root@localhost ~]# ipvsadm -a -t 192.168.200.253:80 -r 192.168.200.15:80 -g -w 1

[root@localhost ~]# ipvsadm -Ln

IP Virtual Server version 1.2.1 (size=4096)

Prot LocalAddress:Port Scheduler Flags

-> RemoteAddress:Port Forward Weight ActiveConn InActConn

TCP 192.168.200.254:80 rr

-> 192.168.200.14:80 Route 1 0 0

-> 192.168.200.15:80 Route 1 0 0

第二台虚拟机（LVS2备用）

一、安装ipvsadm,keepalived

[root@localhost ~]# yum -y install ipvsadm

[root@localhost ~]# yum -y install keepalived

二、配置keepalived文件

[root@localhost ~]# cd /etc/keepalived/

[root@localhost keepalived]# ls

keepalived.conf

[root@localhost keepalived]# cp keepalived.conf keepalived.conf.bak

[root@localhost keepalived]# vim keepalived.conf

1 ! Configuration File for keepalived

3 global_defs {

4 notification_email {

5 [email protected]

6 }

7 notification_email_from [email protected]

8 smtp_server 192.168.200.1

9 smtp_connect_timeout 30

10 router_id LVS_ BACKUP

11 vrrp_skip_check_adv_addr

12 vrrp_strict

13 vrrp_garp_interval 0

14 vrrp_gna_interval 0

15 }

17 vrrp_instance VI_1 {

18 state MASTER

19 interface eno16777728

20 virtual_router_id 51

21 priority 90

22 advert_int 1

23 authentication {

24 auth_type PASS

25 auth_pass 1111

26 }

27 virtual_ipaddress {

28 192.168.200.16

29 192.168.200.17

30 192.168.200.18

31 }

32 }

34 virtual_server 192.168.200.253 80 {

35 delay_loop 6

36 lb_algo rr

37 lb_kind DR

38 protocol TCP

40 real_server 192.168.200.14 80 {

41 weight 1

42 TCP_CHECK {

43 connect_timeout 3

44 nb_get_retry 3

45 delay_before_retry 3

46 connect_port 80

47 }

48 real_server 192.168.200.15 80 {

49 weight 1

50 TCP_CHECK {

51 connect_timeout 3

52 nb_get_retry 3

53 delay_before_retry 3

54 connect_port 80

55 }

56 }

六、启动keepalived服务

[root@localhost ~]# systemctl start keepalived

七、查看VIP

ifconfig eno16777728:0 192.168.200.254 netmask 255.255.255.0

ifconfig eno16777728:0

[root@localhost ~]# ip a

八、查看策略

[root@localhost ~]# ipvsadm -A -t 192.168.200.253:80 -s rr

[root@localhost ~]# ipvsadm -a -t 192.168.200.253:80 -r 192.168.200.14:80 -g -w 1

[root@localhost ~]# ipvsadm -a -t 192.168.200.253:80 -r 192.168.200.15:80 -g -w 1

[root@localhost ~]# ipvsadm -Ln

IP Virtual Server version 1.2.1 (size=4096)

Prot LocalAddress:Port Scheduler Flags

-> RemoteAddress:Port Forward Weight ActiveConn InActConn

TCP 192.168.200.253:80 rr

-> 192.168.200.14:80 Route 1 0 0

-> 192.168.200.15:80 Route 1 0 0

第三台虚拟机（Apache服务器的配置）

一、网络配置

[root@localhost ~]# ifconfig lo:0 192.168.200.254 netmask 255.255.255.255

[root@localhost ~]# ifconfig lo:1 192.168.200.253 netmask 255.255.255.255

[root@localhost ~]# 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

inet 192.168.200.254/32 scope global lo:0

valid_lft forever preferred_lft forever

inet 192.168.200.253/32 scope global lo:1

valid_lft forever preferred_lft forever

inet6 ::1/128 scope host

valid_lft forever preferred_lft forever

2: eno16777728: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000

link/ether 00:0c:29:76:5e:d7 brd ff:ff:ff:ff:ff:ff

inet 192.168.200.14/24 brd 192.168.200.255 scope global eno16777728

valid_lft forever preferred_lft forever

inet6 fe80::20c:29ff:fe76:5ed7/64 scope link

valid_lft forever preferred_lft forever

二、路由配置

[root@localhost ~]# route add -host 192.168.200.254 dev lo:0

[root@localhost ~]# route add -host 192.168.200.253 dev lo:1

三、参数配置

[root@localhost ~]# vim /etc/sysctl.conf

1 net.ipv4.conf.all.arp_ignore = 1

2 net.ipv4.conf.all.arp_announce = 2

3 net.ipv4.conf.default.arp_ignore = 1

4 net.ipv4.conf.default.arp_announce = 2

5 net.ipv4.conf.lo.arp_ignore = 1

6net.ipv4.conf.lo.arp_announce = 2

启用参数

[root@localhost ~]# sysctl -p

net.ipv4.conf.all.arp_ignore = 1

net.ipv4.conf.all.arp_announce = 2

net.ipv4.conf.default.arp_ignore = 1

net.ipv4.conf.default.arp_announce = 2

net.ipv4.conf.lo.arp_ignore = 1

net.ipv4.conf.lo.arp_announce = 2

四、安装http服务

准备测试文件

[root@localhost ~]# yum -y install httpd

[root@localhost ~]# echo "1111" > /var/www/html/index.html

[root@localhost ~]# systemctl start httpd

第四台虚拟机（Apache服务器的配置）

一、网络配置

[root@localhost ~]# ifconfig lo:0 192.168.200.254 netmask 255.255.255.255

[root@localhost ~]# ifconfig lo:1 192.168.200.253 netmask 255.255.255.255

[root@localhost ~]# 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

inet 192.168.200.254/32 scope global lo:0

valid_lft forever preferred_lft forever

inet 192.168.200.253/32 scope global lo:1

valid_lft forever preferred_lft forever

inet6 ::1/128 scope host

valid_lft forever preferred_lft forever

2: eno16777728: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000

link/ether 00:0c:29:76:5e:d7 brd ff:ff:ff:ff:ff:ff

inet 192.168.200.14/24 brd 192.168.200.255 scope global eno16777728

valid_lft forever preferred_lft forever

inet6 fe80::20c:29ff:fe76:5ed7/64 scope link

valid_lft forever preferred_lft forever

二、路由配置

[root@localhost ~]# route add -host 192.168.200.254 dev lo:0

[root@localhost ~]# route add -host 192.168.200.253 dev lo:1

三、参数配置

[root@localhost ~]# vim /etc/sysctl.conf

1 net.ipv4.conf.all.arp_ignore = 1

2 net.ipv4.conf.all.arp_announce = 2

3 net.ipv4.conf.default.arp_ignore = 1

4 net.ipv4.conf.default.arp_announce = 2

5 net.ipv4.conf.lo.arp_ignore = 1

6net.ipv4.conf.lo.arp_announce = 2

启用参数

[root@localhost ~]# sysctl -p

net.ipv4.conf.all.arp_ignore = 1

net.ipv4.conf.all.arp_announce = 2

net.ipv4.conf.default.arp_ignore = 1

net.ipv4.conf.default.arp_announce = 2

net.ipv4.conf.lo.arp_ignore = 1

net.ipv4.conf.lo.arp_announce = 2

四、安装http服务

准备测试文件

[root@localhost ~]# yum -y install httpd

[root@localhost ~]# echo "2222" > /var/www/html/index.html

[root@localhost ~]# systemctl start httpd

五、测试

LVS负载均衡实现双向设备

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