前言
LVS(Linux Virtual Server) 是一款开源的 LB(load balancing) 软件
The Linux Virtual Server is a highly scalable and highly available server built on a cluster of real servers, with the load balancer running on the Linux operating system. The architecture of the server cluster is fully transparent to end users, and the users interact as if it were a single high-performance virtual server
LVS 的主要目的是构建一个高性能，高可用，可扩展，可靠的 Linux 集群服务
Build a high-performance and highly available server for Linux using clustering technology, which provides good scalability, reliability and serviceability.
LVS 主要有三种模式：
- NAT
- TUN
- DR
它们的主要区别可以参考
VS/NAT | VS/TUN | VS/DR | |
|---|---|---|---|
server | any | tunneling | non-arp device |
server network | private | LAN/WAN | LAN |
server number | low (10~20) | high | high |
server gateway | load balancer | own router | own router |
详细区别可以参考 How virtual server works
这里演示一下如何配置 LVS 的 NAT 模式
参考 负载均衡LVS基本介绍 和 Virtual Server via NAT
Tip: 当前的版本为 IPVS 1.2.1
操作
系统环境
DS
代码语言：javascript复制[root@ds1 ~]# hostnamectl
Static hostname: ds1
Icon name: computer-vm
Chassis: vm
Machine ID: fce1d1d9ca0345dca5e300f4ee8f6b0a
Boot ID: 74351cfc58704f39bf68e5e487700c7a
Virtualization: kvm
Operating System: CentOS Linux 7 (Core)
CPE OS Name: cpe:/o:centos:centos:7
Kernel: Linux 3.10.0-862.2.3.el7.x86_64
Architecture: x86-64
[root@ds1 ~]# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
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 group default qlen 1000
link/ether 52:54:00:c9:c7:04 brd ff:ff:ff:ff:ff:ff
inet 10.0.2.15/24 brd 10.0.2.255 scope global noprefixroute dynamic eth0
valid_lft 80818sec preferred_lft 80818sec
inet6 fe80::5054:ff:fec9:c704/64 scope link
valid_lft forever preferred_lft forever
3: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
link/ether 08:00:27:fc:bf:30 brd ff:ff:ff:ff:ff:ff
inet 192.168.1.181/24 brd 192.168.1.255 scope global noprefixroute eth1
valid_lft forever preferred_lft forever
inet6 fe80::a00:27ff:fefc:bf30/64 scope link
valid_lft forever preferred_lft forever
4: eth2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
link/ether 08:00:27:b3:ae:0b brd ff:ff:ff:ff:ff:ff
inet 192.168.56.181/24 brd 192.168.56.255 scope global noprefixroute eth2
valid_lft forever preferred_lft forever
inet6 fe80::a00:27ff:feb3:ae0b/64 scope link
valid_lft forever preferred_lft forever
[root@ds1 ~]# cat /etc/centos-release
CentOS Linux release 7.5.1804 (Core)
[root@ds1 ~]# RS
代码语言：javascript复制[root@rs1 ~]# hostnamectl
Static hostname: rs1
Icon name: computer-vm
Chassis: vm
Machine ID: f7f1e12e7c2b48cd90739bb41d24c97d
Boot ID: 8d41cd0741874572aa2564a790a8cdc5
Virtualization: kvm
Operating System: CentOS Linux 7 (Core)
CPE OS Name: cpe:/o:centos:centos:7
Kernel: Linux 3.10.0-862.2.3.el7.x86_64
Architecture: x86-64
[root@rs1 ~]# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
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 group default qlen 1000
link/ether 52:54:00:c9:c7:04 brd ff:ff:ff:ff:ff:ff
inet 10.0.2.15/24 brd 10.0.2.255 scope global noprefixroute dynamic eth0
valid_lft 80707sec preferred_lft 80707sec
inet6 fe80::5054:ff:fec9:c704/64 scope link
valid_lft forever preferred_lft forever
3: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
link/ether 08:00:27:ab:52:cb brd ff:ff:ff:ff:ff:ff
inet 192.168.56.183/24 brd 192.168.56.255 scope global noprefixroute eth1
valid_lft forever preferred_lft forever
inet6 fe80::a00:27ff:feab:52cb/64 scope link
valid_lft forever preferred_lft forever
[root@rs1 ~]# cat /etc/centos-release
CentOS Linux release 7.5.1804 (Core)
[root@rs1 ~]# 网络环境
代码语言：javascript复制ds1:
192.168.1.181
192.168.56.181
rs1:
192.168.56.183
rs2:
192.168.56.184VIP 为 192.168.1.183
拓扑
代码语言：javascript复制client<-->ds1<-->rs1
`->rs2概念
- DS：Director Server 指的是前端负载均衡器节点
- RS：Real Server 后端真实的工作服务器
- VIP：向外部直接面向用户请求，作为用户请求的目标的IP地址
- DIP：Director Server IP，主要用于和内部主机通讯的IP地址
- RIP：Real Server IP，后端服务器的IP地址
- CIP：Client IP，访问客户端的IP地址
安装 nginx
代码语言：javascript复制[root@rs1 ~]# rpm -Uvh http://nginx.org/packages/centos/7/noarch/RPMS/nginx-release-centos-7-0.el7.ngx.noarch.rpm
Retrieving http://nginx.org/packages/centos/7/noarch/RPMS/nginx-release-centos-7-0.el7.ngx.noarch.rpm
warning: /var/tmp/rpm-tmp.dehFJg: Header V4 RSA/SHA1 Signature, key ID 7bd9bf62: NOKEY
Preparing... ################################# [100%]
Updating / installing...
1:nginx-release-centos-7-0.el7.ngx ################################# [100%]
[root@rs1 ~]# yum list all | grep -i nginx
nginx-release-centos.noarch 7-0.el7.ngx installed
nginx.x86_64 1:1.14.0-1.el7_4.ngx nginx
nginx-debug.x86_64 1:1.8.0-1.el7.ngx nginx
nginx-debuginfo.x86_64 1:1.14.0-1.el7_4.ngx nginx
nginx-module-geoip.x86_64 1:1.14.0-1.el7_4.ngx nginx
nginx-module-geoip-debuginfo.x86_64 1:1.14.0-1.el7_4.ngx nginx
nginx-module-image-filter.x86_64 1:1.14.0-1.el7_4.ngx nginx
nginx-module-image-filter-debuginfo.x86_64 1:1.14.0-1.el7_4.ngx nginx
nginx-module-njs.x86_64 1:1.14.0.0.2.0-1.el7_4.ngx nginx
nginx-module-njs-debuginfo.x86_64 1:1.14.0.0.2.0-1.el7_4.ngx nginx
nginx-module-perl.x86_64 1:1.14.0-1.el7_4.ngx nginx
nginx-module-perl-debuginfo.x86_64 1:1.14.0-1.el7_4.ngx nginx
nginx-module-xslt.x86_64 1:1.14.0-1.el7_4.ngx nginx
nginx-module-xslt-debuginfo.x86_64 1:1.14.0-1.el7_4.ngx nginx
nginx-nr-agent.noarch 2.0.0-12.el7.ngx nginx
pcp-pmda-nginx.x86_64 3.12.2-5.el7 base
[root@rs1 ~]# yum install -y nginx.x86_64
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
* base: mirrors.vinahost.vn
* extras: mirrors.vinahost.vn
* updates: centos.ipserverone.com
Resolving Dependencies
--> Running transaction check
---> Package nginx.x86_64 1:1.14.0-1.el7_4.ngx will be installed
--> Finished Dependency Resolution
Dependencies Resolved
================================================================================
Package Arch Version Repository Size
================================================================================
Installing:
nginx x86_64 1:1.14.0-1.el7_4.ngx nginx 750 k
Transaction Summary
================================================================================
Install 1 Package
Total download size: 750 k
Installed size: 2.6 M
Downloading packages:
nginx-1.14.0-1.el7_4.ngx.x86_64.rpm | 750 kB 00:02
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
Warning: RPMDB altered outside of yum.
Installing : 1:nginx-1.14.0-1.el7_4.ngx.x86_64 1/1
----------------------------------------------------------------------
Thanks for using nginx!
Please find the official documentation for nginx here:
* http://nginx.org/en/docs/
Please subscribe to nginx-announce mailing list to get
the most important news about nginx:
* http://nginx.org/en/support.html
Commercial subscriptions for nginx are available on:
* http://nginx.com/products/
----------------------------------------------------------------------
Verifying : 1:nginx-1.14.0-1.el7_4.ngx.x86_64 1/1
Installed:
nginx.x86_64 1:1.14.0-1.el7_4.ngx
Complete!
[root@rs1 ~]# systemctl start nginx.service
[root@rs1 ~]# curl localhost:80
<!DOCTYPE html>
<html>
<head>
<title>Welcome to nginx!</title>
<style>
body {
width: 35em;
margin: 0 auto;
font-family: Tahoma, Verdana, Arial, sans-serif;
}
</style>
</head>
<body>
<h1>Welcome to nginx!</h1>
<p>If you see this page, the nginx web server is successfully installed and
working. Further configuration is required.</p>
<p>For online documentation and support please refer to
<a href="http://nginx.org/">nginx.org</a>.<br/>
Commercial support is available at
<a href="http://nginx.com/">nginx.com</a>.</p>
<p><em>Thank you for using nginx.</em></p>
</body>
</html>
[root@rs1 ~]#
[root@rs1 conf.d]# echo 'rs1' > /usr/share/nginx/html/index.html
[root@rs1 conf.d]# curl localhost:80
rs1
[root@rs1 conf.d]# 将 RS2 也执行相同的操作
代码语言：javascript复制[root@rs2 ~]# echo 'rs2' > /usr/share/nginx/html/index.html
[root@rs2 ~]# curl localhost:80
rs2
[root@rs2 ~]# 安装 ipvsadm
代码语言：javascript复制[root@ds1 ~]# yum install ipvsadm
Loaded plugins: fastestmirror
Determining fastest mirrors
* base: mirrors.vhost.vn
* extras: mirrors.vhost.vn
* updates: mirrors.vhost.vn
base | 3.6 kB 00:00
extras | 3.4 kB 00:00
updates | 3.4 kB 00:00
(1/4): extras/7/x86_64/primary_db | 147 kB 00:00
(2/4): base/7/x86_64/group_gz | 166 kB 00:00
(3/4): updates/7/x86_64/primary_db | 2.0 MB 00:02
(4/4): base/7/x86_64/primary_db | 5.9 MB 00:04
Resolving Dependencies
--> Running transaction check
---> Package ipvsadm.x86_64 0:1.27-7.el7 will be installed
--> Finished Dependency Resolution
Dependencies Resolved
================================================================================
Package Arch Version Repository Size
================================================================================
Installing:
ipvsadm x86_64 1.27-7.el7 base 45 k
Transaction Summary
================================================================================
Install 1 Package
Total download size: 45 k
Installed size: 75 k
Is this ok [y/d/N]: y
Downloading packages:
warning: /var/cache/yum/x86_64/7/base/packages/ipvsadm-1.27-7.el7.x86_64.rpm: Header V3 RSA/SHA256 Signature, key ID f4a80eb5: NOKEY
Public key for ipvsadm-1.27-7.el7.x86_64.rpm is not installed
ipvsadm-1.27-7.el7.x86_64.rpm | 45 kB 00:00
Retrieving key from file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
Importing GPG key 0xF4A80EB5:
Userid : "CentOS-7 Key (CentOS 7 Official Signing Key) <security@centos.org>"
Fingerprint: 6341 ab27 53d7 8a78 a7c2 7bb1 24c6 a8a7 f4a8 0eb5
Package : centos-release-7-5.1804.el7.centos.x86_64 (@anaconda)
From : /etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
Is this ok [y/N]: y
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
Installing : ipvsadm-1.27-7.el7.x86_64 1/1
Verifying : ipvsadm-1.27-7.el7.x86_64 1/1
Installed:
ipvsadm.x86_64 0:1.27-7.el7
Complete!
[root@ds1 ~]#
[root@ds1 ~]# ipvsadm --version
ipvsadm v1.27 2008/5/15 (compiled with popt and IPVS v1.2.1)
[root@ds1 ~]# 装的东西很少
代码语言：javascript复制[root@ds1 ~]# rpm -ql ipvsadm
/etc/sysconfig/ipvsadm-config
/usr/lib/systemd/system/ipvsadm.service
/usr/sbin/ipvsadm
/usr/sbin/ipvsadm-restore
/usr/sbin/ipvsadm-save
/usr/share/doc/ipvsadm-1.27
/usr/share/doc/ipvsadm-1.27/README
/usr/share/man/man8/ipvsadm-restore.8.gz
/usr/share/man/man8/ipvsadm-save.8.gz
/usr/share/man/man8/ipvsadm.8.gz
[root@ds1 ~]# 查看帮助
代码语言：javascript复制[root@ds1 ~]# ipvsadm -h
ipvsadm v1.27 2008/5/15 (compiled with popt and IPVS v1.2.1)
Usage:
ipvsadm -A|E -t|u|f service-address [-s scheduler] [-p [timeout]] [-M netmask] [--pe persistence_engine] [-b sched-flags]
ipvsadm -D -t|u|f service-address
ipvsadm -C
ipvsadm -R
ipvsadm -S [-n]
ipvsadm -a|e -t|u|f service-address -r server-address [options]
ipvsadm -d -t|u|f service-address -r server-address
ipvsadm -L|l [options]
ipvsadm -Z [-t|u|f service-address]
ipvsadm --set tcp tcpfin udp
ipvsadm --start-daemon state [--mcast-interface interface] [--syncid sid]
ipvsadm --stop-daemon state
ipvsadm -h
Commands:
Either long or short options are allowed.
--add-service -A add virtual service with options
--edit-service -E edit virtual service with options
--delete-service -D delete virtual service
--clear -C clear the whole table
--restore -R restore rules from stdin
--save -S save rules to stdout
--add-server -a add real server with options
--edit-server -e edit real server with options
--delete-server -d delete real server
--list -L|-l list the table
--zero -Z zero counters in a service or all services
--set tcp tcpfin udp set connection timeout values
--start-daemon start connection sync daemon
--stop-daemon stop connection sync daemon
--help -h display this help message
Options:
--tcp-service -t service-address service-address is host[:port]
--udp-service -u service-address service-address is host[:port]
--fwmark-service -f fwmark fwmark is an integer greater than zero
--ipv6 -6 fwmark entry uses IPv6
--scheduler -s scheduler one of rr|wrr|lc|wlc|lblc|lblcr|dh|sh|sed|nq,
the default scheduler is wlc.
--pe engine alternate persistence engine may be sip,
not set by default.
--persistent -p [timeout] persistent service
--netmask -M netmask persistent granularity mask
--real-server -r server-address server-address is host (and port)
--gatewaying -g gatewaying (direct routing) (default)
--ipip -i ipip encapsulation (tunneling)
--masquerading -m masquerading (NAT)
--weight -w weight capacity of real server
--u-threshold -x uthreshold upper threshold of connections
--l-threshold -y lthreshold lower threshold of connections
--mcast-interface interface multicast interface for connection sync
--syncid sid syncid for connection sync (default=255)
--connection -c output of current IPVS connections
--timeout output of timeout (tcp tcpfin udp)
--daemon output of daemon information
--stats output of statistics information
--rate output of rate information
--exact expand numbers (display exact values)
--thresholds output of thresholds information
--persistent-conn output of persistent connection info
--nosort disable sorting output of service/server entries
--sort does nothing, for backwards compatibility
--ops -o one-packet scheduling
--numeric -n numeric output of addresses and ports
--sched-flags -b flags scheduler flags (comma-separated)
[root@ds1 ~]# 启动 DS 路由转发
开启内核转发
代码语言：javascript复制[root@ds1 ~]# cat /proc/sys/net/ipv4/ip_forward
0
[root@ds1 ~]# echo 1 > /proc/sys/net/ipv4/ip_forward
[root@ds1 ~]# cat /proc/sys/net/ipv4/ip_forward
1
[root@ds1 ~]# 开启防火墙转发
代码语言：javascript复制[root@ds1 ~]# iptables -A FORWARD -i eth2 -j ACCEPT
[root@ds1 ~]# iptables -t nat -A POSTROUTING -s 192.168.56.0/24 -j MASQUERADE
[root@ds1 ~]#
[root@ds1 ~]# iptables -t nat -L -nv
Chain PREROUTING (policy ACCEPT 3 packets, 244 bytes)
pkts bytes target prot opt in out source destination
Chain INPUT (policy ACCEPT 0 packets, 0 bytes)
pkts bytes target prot opt in out source destination
Chain OUTPUT (policy ACCEPT 2 packets, 152 bytes)
pkts bytes target prot opt in out source destination
Chain POSTROUTING (policy ACCEPT 2 packets, 152 bytes)
pkts bytes target prot opt in out source destination
2 168 MASQUERADE all -- * * 192.168.56.0/24 0.0.0.0/0
[root@ds1 ~]# 这两步的主要目的是将 DS 变成一台路由器
配置 RS 路由
代码语言：javascript复制[root@rs2 ~]# ip route
default via 192.168.56.181 dev eth1
[root@rs2 ~]# [root@rs1 ~]# ip route
default via 192.168.56.181 dev eth1
[root@rs1 ~]# 让 RS 的出口流量都经过 DS
在没有了外网网关后，可以通过，ping 一个被 DS 连接而没被 RS 直接连接的网络来确认路由已经配置正常
比如：
手动绑定 VIP 到 DS 上
代码语言：javascript复制[root@ds1 ~]# ip address add 192.168.1.183/24 dev eth1
[root@ds1 ~]# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
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 group default qlen 1000
link/ether 52:54:00:c9:c7:04 brd ff:ff:ff:ff:ff:ff
inet 10.0.2.15/24 brd 10.0.2.255 scope global noprefixroute dynamic eth0
valid_lft 74014sec preferred_lft 74014sec
inet6 fe80::5054:ff:fec9:c704/64 scope link
valid_lft forever preferred_lft forever
3: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
link/ether 08:00:27:fc:bf:30 brd ff:ff:ff:ff:ff:ff
inet 192.168.1.181/24 brd 192.168.1.255 scope global noprefixroute eth1
valid_lft forever preferred_lft forever
inet 192.168.1.183/24 scope global secondary eth1
valid_lft forever preferred_lft forever
inet6 fe80::a00:27ff:fefc:bf30/64 scope link
valid_lft forever preferred_lft forever
4: eth2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
link/ether 08:00:27:b3:ae:0b brd ff:ff:ff:ff:ff:ff
inet 192.168.56.181/24 brd 192.168.56.255 scope global noprefixroute eth2
valid_lft forever preferred_lft forever
inet6 fe80::a00:27ff:feb3:ae0b/64 scope link
valid_lft forever preferred_lft forever
[root@ds1 ~]# LVS NAT 配置
代码语言：javascript复制[root@ds1 ~]# ipvsadm -A -t 192.168.1.183:80 -s rr
[root@ds1 ~]# ipvsadm -a -t 192.168.1.183:80 -r 192.168.56.183 -m
[root@ds1 ~]# ipvsadm -a -t 192.168.1.183:80 -r 192.168.56.184 -m
[root@ds1 ~]# echo $?
0
[root@ds1 ~]# 列出配置
代码语言：javascript复制[root@ds1 ~]# ipvsadm -L -n
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
-> RemoteAddress:Port Forward Weight ActiveConn InActConn
TCP 192.168.1.183:80 rr
-> 192.168.56.183:80 Masq 1 0 4
-> 192.168.56.184:80 Masq 1 0 4
[root@ds1 ~]# 进行访问
代码语言：javascript复制wilmos@Nothing:~$ curl http://192.168.1.183
rs2
wilmos@Nothing:~$ curl http://192.168.1.183
rs1
wilmos@Nothing:~$ curl http://192.168.1.183
rs2
wilmos@Nothing:~$ curl http://192.168.1.183
rs1
wilmos@Nothing:~$ curl http://192.168.1.183
rs2
wilmos@Nothing:~$ curl http://192.168.1.183
rs1
wilmos@Nothing:~$ curl http://192.168.1.183
rs2
wilmos@Nothing:~$ curl http://192.168.1.183
rs1
wilmos@Nothing:~$ curl http://192.168.1.183
rs2
wilmos@Nothing:~$ curl http://192.168.1.183
rs1
wilmos@Nothing:~$ 可见 rs1 和 rs2 在接受轮询访问
这就代表 LVS NAT 已经正常配置了
端口映射
再给 DS 的 eth1 加一个 VIP 192.168.1.184
代码语言：javascript复制[root@ds1 ~]# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
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 group default qlen 1000
link/ether 52:54:00:c9:c7:04 brd ff:ff:ff:ff:ff:ff
inet 10.0.2.15/24 brd 10.0.2.255 scope global noprefixroute dynamic eth0
valid_lft 72579sec preferred_lft 72579sec
inet6 fe80::5054:ff:fec9:c704/64 scope link
valid_lft forever preferred_lft forever
3: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
link/ether 08:00:27:fc:bf:30 brd ff:ff:ff:ff:ff:ff
inet 192.168.1.181/24 brd 192.168.1.255 scope global noprefixroute eth1
valid_lft forever preferred_lft forever
inet 192.168.1.183/24 scope global secondary eth1
valid_lft forever preferred_lft forever
inet 192.168.1.184/24 scope global secondary eth1
valid_lft forever preferred_lft forever
inet6 fe80::a00:27ff:fefc:bf30/64 scope link
valid_lft forever preferred_lft forever
4: eth2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
link/ether 08:00:27:b3:ae:0b brd ff:ff:ff:ff:ff:ff
inet 192.168.56.181/24 brd 192.168.56.255 scope global noprefixroute eth2
valid_lft forever preferred_lft forever
inet6 fe80::a00:27ff:feb3:ae0b/64 scope link
valid_lft forever preferred_lft forever
[root@ds1 ~]#配置端口映射，将 80 映射为 8099
代码语言：javascript复制[root@ds1 ~]# ipvsadm -A -t 192.168.1.184:8099 -s wrr
[root@ds1 ~]# ipvsadm -a -t 192.168.1.184:8099 -r 192.168.56.183:80 -m -w 1
[root@ds1 ~]# ipvsadm -a -t 192.168.1.184:8099 -r 192.168.56.184:80 -m -w 1
[root@ds1 ~]# echo $?
0
[root@ds1 ~]# 查看配置
代码语言：javascript复制[root@ds1 ~]# ipvsadm -L -n
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
-> RemoteAddress:Port Forward Weight ActiveConn InActConn
TCP 192.168.1.183:80 rr
-> 192.168.56.183:80 Masq 1 0 0
-> 192.168.56.184:80 Masq 1 0 0
TCP 192.168.1.184:8099 wrr
-> 192.168.56.183:80 Masq 1 0 0
-> 192.168.56.184:80 Masq 1 0 0
[root@ds1 ~]# 进行访问测试
