您好,登錄后才能下訂單哦!
? 上篇文章講述了LVS負(fù)載均衡相關(guān)理論知識(shí),今天主要來詳細(xì)地來對(duì)LVS工作模式之一的NAT模式進(jìn)行實(shí)驗(yàn)配置。
詳細(xì)原理可以參考:https://blog.51cto.com/14557673/2467243
? 首先我們要明確的是NAT模式的最大特點(diǎn)是什么?
? 可以這樣概述:LVS負(fù)載均衡之NAT模式(NAT充當(dāng)網(wǎng)關(guān))是一種基于網(wǎng)絡(luò)地址轉(zhuǎn)換技術(shù),通過負(fù)載均衡器實(shí)現(xiàn)高并發(fā)的數(shù)據(jù)請(qǐng)求和使用調(diào)度算法實(shí)現(xiàn)優(yōu)化服務(wù)響應(yīng)的進(jìn)出口相同的架構(gòu),具備高可用高安全性能。
? 而其最大劣勢(shì)在于數(shù)據(jù)的出入口都是在負(fù)載均衡器(NAT服務(wù)器上),這樣所造成的的后果就是無法支持高并發(fā)的數(shù)據(jù)請(qǐng)求(巨量),并且數(shù)據(jù)的響應(yīng)回傳過程加劇了這一弊病。所以才有了后續(xù)的改進(jìn)。
? 首先我們需要四臺(tái)服務(wù)器:一臺(tái)負(fù)載均衡調(diào)度器、兩臺(tái)web(這里使用兩個(gè)Apache)服務(wù)器、一臺(tái)存儲(chǔ)服務(wù)器(NFS方式)。使用一臺(tái)Windows作為外網(wǎng)客戶主機(jī)進(jìn)行模擬。
? 架構(gòu)如下:4臺(tái)Centos7和一臺(tái)win10構(gòu)成
? 網(wǎng)段ip地址分配如下表所示:
設(shè)備 | ip地址 |
---|---|
win10客戶機(jī) | 10.0.0.10/24 |
負(fù)載調(diào)度器 | 外網(wǎng)卡:10.0.0.1/24 內(nèi)網(wǎng)卡:192.168.10.1/24 |
HTTP服務(wù)器1 | 192.168.10.10/24 |
HTTP服務(wù)器2 | 192.168.10.20/24 |
NFS存儲(chǔ)服務(wù)器 | 192.168.10.100/24 |
? 那么我們從外網(wǎng)的一臺(tái)客戶機(jī)進(jìn)行網(wǎng)站訪問,實(shí)際上訪問的是負(fù)載均衡器的外網(wǎng)卡地址,而對(duì)于服務(wù)器端客戶機(jī)是一無所知的。那么我們需要進(jìn)行內(nèi)網(wǎng)與外網(wǎng)的互通,那么就可以使用NAT方式實(shí)現(xiàn)互通。從而將服務(wù)請(qǐng)求發(fā)送給真實(shí)服務(wù)器,獲取所需資源后再返回給負(fù)載均衡器進(jìn)行NAT網(wǎng)絡(luò)地址轉(zhuǎn)換后將資源返回給客戶機(jī)。在生產(chǎn)環(huán)境中一般后臺(tái)的存儲(chǔ)服務(wù)器都是有多個(gè)備份的,并且資源都是一致的,不過我們?yōu)榱蓑?yàn)證調(diào)度算法輪循訪問的機(jī)制,我們就需要在兩個(gè)網(wǎng)站寫入不同的的內(nèi)容加以區(qū)分驗(yàn)證該調(diào)度算法。
? 下面請(qǐng)看具體的配置:
? 根據(jù)上面的架構(gòu)圖和地址分配我們完成這個(gè)實(shí)驗(yàn)需要進(jìn)行如下的步驟配置。
? 1.查看相關(guān)軟件包nfs服務(wù)
[root@nfs ~]# rpm -q nfs-utils
nfs-utils-1.3.0-0.48.el7.x86_64
[root@nfs ~]# rpm -q rpcbind
rpcbind-0.2.0-42.el7.x86_64
[root@nfs ~]# mkdir /opt/ll /opt/cc #創(chuàng)建站點(diǎn)文件存儲(chǔ)目錄
? 2.掛載兩塊新的磁盤并且進(jìn)行設(shè)置
sdb磁盤配置:
[root@nfs ~]# fdisk /dev/sdb
歡迎使用 fdisk (util-linux 2.23.2)。
更改將停留在內(nèi)存中,直到您決定將更改寫入磁盤。
使用寫入命令前請(qǐng)三思。
Device does not contain a recognized partition table
使用磁盤標(biāo)識(shí)符 0x400f42da 創(chuàng)建新的 DOS 磁盤標(biāo)簽。
命令(輸入 m 獲取幫助):n
Partition type:
p primary (0 primary, 0 extended, 4 free)
e extended
Select (default p):
Using default response p
分區(qū)號(hào) (1-4,默認(rèn) 1):
起始 扇區(qū) (2048-41943039,默認(rèn)為 2048):
將使用默認(rèn)值 2048
Last 扇區(qū), +扇區(qū) or +size{K,M,G} (2048-41943039,默認(rèn)為 41943039):
將使用默認(rèn)值 41943039
分區(qū) 1 已設(shè)置為 Linux 類型,大小設(shè)為 20 GiB
命令(輸入 m 獲取幫助):w
The partition table has been altered!
Calling ioctl() to re-read partition table.
正在同步磁盤。
[root@nfs ~]# mkfs.xfs /dev/sdb1
meta-data=/dev/sdb1 isize=512 agcount=4, agsize=1310656 blks
= sectsz=512 attr=2, projid32bit=1
= crc=1 finobt=0, sparse=0
data = bsize=4096 blocks=5242624, imaxpct=25
= sunit=0 swidth=0 blks
naming =version 2 bsize=4096 ascii-ci=0 ftype=1
log =internal log bsize=4096 blocks=2560, version=2
= sectsz=512 sunit=0 blks, lazy-count=1
realtime =none extsz=4096 blocks=0, rtextents=0
sdc磁盤配置:
[root@nfs ~]# fdisk /dev/sdc
歡迎使用 fdisk (util-linux 2.23.2)。
更改將停留在內(nèi)存中,直到您決定將更改寫入磁盤。
使用寫入命令前請(qǐng)三思。
Device does not contain a recognized partition table
使用磁盤標(biāo)識(shí)符 0x1ef07039 創(chuàng)建新的 DOS 磁盤標(biāo)簽。
命令(輸入 m 獲取幫助):n
Partition type:
p primary (0 primary, 0 extended, 4 free)
e extended
Select (default p):
Using default response p
分區(qū)號(hào) (1-4,默認(rèn) 1):
起始 扇區(qū) (2048-41943039,默認(rèn)為 2048):
將使用默認(rèn)值 2048
Last 扇區(qū), +扇區(qū) or +size{K,M,G} (2048-41943039,默認(rèn)為 41943039):
將使用默認(rèn)值 41943039
分區(qū) 1 已設(shè)置為 Linux 類型,大小設(shè)為 20 GiB
命令(輸入 m 獲取幫助):w
The partition table has been altered!
Calling ioctl() to re-read partition table.
正在同步磁盤。
[root@nfs ~]# mkfs.xfs /dev/sdc1
meta-data=/dev/sdc1 isize=512 agcount=4, agsize=1310656 blks
= sectsz=512 attr=2, projid32bit=1
= crc=1 finobt=0, sparse=0
data = bsize=4096 blocks=5242624, imaxpct=25
= sunit=0 swidth=0 blks
naming =version 2 bsize=4096 ascii-ci=0 ftype=1
log =internal log bsize=4096 blocks=2560, version=2
= sectsz=512 sunit=0 blks, lazy-count=1
realtime =none extsz=4096 blocks=0, rtextents=0
? 3.對(duì)兩塊磁盤進(jìn)行掛載設(shè)置——使用永久掛載
[root@nfs ~]# vim /etc/fstab #在該文件最后添加掛載信息,如下所示
[root@nfs ~]# tail /etc/fstab
#
# Accessible filesystems, by reference, are maintained under '/dev/disk'
# See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info
#
UUID=3f9b526a-3a51-4f87-b68a-37292b4e2e59 / xfs defaults 0 0
UUID=33d508c7-a776-4d6a-9c9b-a51bf3855004 /boot xfs defaults 0 0
UUID=90be4302-e340-4fe3-9ed2-3c40e346979e /home xfs defaults 0 0
UUID=09112ee8-0d24-4c5e-83d2-08c1f16bc738 swap swap defaults 0 0
/dev/sdb1 /opt/ll xfs defaults 0 0
/dev/sdc1 /opt/cc xfs defaults 0 0
[root@nfs ~]# mount -a
[root@nfs ~]# df -hT
文件系統(tǒng) 類型 容量 已用 可用 已用% 掛載點(diǎn)
/dev/sda2 xfs 15G 3.7G 12G 25% /
devtmpfs devtmpfs 898M 0 898M 0% /dev
tmpfs tmpfs 912M 0 912M 0% /dev/shm
tmpfs tmpfs 912M 9.0M 903M 1% /run
tmpfs tmpfs 912M 0 912M 0% /sys/fs/cgroup
/dev/sda5 xfs 11G 33M 11G 1% /home
/dev/sda1 xfs 30G 174M 30G 1% /boot
tmpfs tmpfs 183M 4.0K 183M 1% /run/user/42
tmpfs tmpfs 183M 16K 183M 1% /run/user/0
/dev/sdb1 xfs 20G 33M 20G 1% /opt/ll
/dev/sdc1 xfs 20G 33M 20G 1% /opt/cc
#編輯/etc/exports文件
[root@nfs network-scripts]# vim /etc/exports
[root@nfs network-scripts]# cat /etc/exports
/opt/ll 192.168.10.0/24(rw,sync,no_root_squash)
/opt/cc 192.168.10.0/24(rw,sync,no_root_squash)
? 4.關(guān)閉防火墻配置網(wǎng)卡為僅主機(jī)模式并且設(shè)置靜態(tài)ip地址
[root@nfs ~]# systemctl stop firewalld.service
[root@nfs ~]# setenforce 0
[root@nfs ~]# cd /etc/sysconfig/network-scripts/
[root@nfs network-scripts]# vim ifcfg-ens33
[root@nfs network-scripts]# systemctl restart network
[root@nfs network-scripts]# ifconfig ens33
ens33: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.10.100 netmask 255.255.255.0 broadcast 192.168.10.255
inet6 fe80::9be8:a170:f918:1f5 prefixlen 64 scopeid 0x20<link>
ether 00:0c:29:0b:d9:36 txqueuelen 1000 (Ethernet)
RX packets 1151 bytes 685357 (669.2 KiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 444 bytes 39849 (38.9 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
? 5.啟動(dòng)服務(wù)
[root@nfs network-scripts]# systemctl start nfs
[root@nfs network-scripts]# systemctl start rpcbind
[root@nfs network-scripts]# showmount -e #查看掛載情況信息
Export list for nfs:
/opt/cc 192.168.10.0/24
/opt/ll 192.168.10.0/24
? 1.在兩臺(tái)Centos7虛擬機(jī)上安裝httpd網(wǎng)站服務(wù)
[root@localhost ~]# hostnamectl set-hostname web1
[root@localhost ~]# su
[root@web1 ~]# yum install -y httpd
...//省略部分內(nèi)容
[root@localhost ~]# hostnamectl set-hostname web2
[root@localhost ~]# su
[root@web2 ~]# yum install -y httpd
...//省略部分內(nèi)容
? 2.關(guān)閉兩個(gè)web網(wǎng)站服務(wù)器防火墻
[root@web1 ~]# systemctl stop firewalld.service
[root@web1 ~]# setenforce 0
[root@web2 ~]# systemctl stop firewalld.service
[root@web2 ~]# setenforce 0
? 3.配置網(wǎng)卡
#web1配置
[root@web1 ~]# cd /etc/sysconfig/network-scripts/
[root@web1 network-scripts]# vim ifcfg-ens33
[root@web1 network-scripts]# systemctl restart network
[root@web1 network-scripts]# ifconfig ens33
ens33: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.10.10 netmask 255.255.255.0 broadcast 192.168.10.255
inet6 fe80::bdab:b59b:d041:d8b0 prefixlen 64 scopeid 0x20<link>
ether 00:0c:29:e6:6d:eb txqueuelen 1000 (Ethernet)
RX packets 726004 bytes 1067841474 (1018.3 MiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 345476 bytes 21387015 (20.3 MiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
#web2配置
[root@web2 ~]# cd /etc/sysconfig/network-scripts/
[root@web2 network-scripts]# vim ifcfg-ens33
[root@web2 network-scripts]# systemctl restart network
[root@web2 network-scripts]# ifconfig ens33
ens33: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.10.20 netmask 255.255.255.0 broadcast 192.168.10.255
inet6 fe80::bdab:b59b:d041:d8b0 prefixlen 64 scopeid 0x20<link>
ether 00:0c:29:e6:6d:eb txqueuelen 1000 (Ethernet)
RX packets 726004 bytes 1067841474 (1018.3 MiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 345476 bytes 21387015 (20.3 MiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
? 4.啟動(dòng)兩個(gè)web網(wǎng)站服務(wù)并且驗(yàn)證掛載情況
#web1
[root@web1 network-scripts]# systemctl start httpd
[root@web1 network-scripts]# netstat -natp | grep 80
tcp6 0 0 :::80 :::* LISTEN 59242/httpd
[root@web1 network-scripts]# showmount -e 192.168.10.100
Export list for 192.168.10.100:
/opt/cc 192.168.10.0/24
/opt/ll 192.168.10.0/24
#web2
[root@web2 network-scripts]# netstat -natp | grep 80
[root@web2 network-scripts]# systemctl start httpd.service
[root@web2 network-scripts]# netstat -natp | grep 80
tcp6 0 0 :::80 :::* LISTEN 54271/httpd
[root@web2 network-scripts]# showmount -e 192.168.10.100
Export list for 192.168.10.100:
/opt/cc 192.168.10.0/24
/opt/ll 192.168.10.0/24
5.兩個(gè)服務(wù)器上分別提供站點(diǎn),寫入測(cè)試信息
#web1
[root@web1 network-scripts]#vim /etc/fstab
192.168.10.100:/opt/ll /var/www/html nfs defaults._netdev 0 0
[root@web1 network-scripts]# cd /var/www/html/
[root@web1 html]# ls
[root@web1 html]# vim index.html
[root@web1 html]# cat index.html
<head>this is ll web</head>
#web2
[root@web2 network-scripts]#vim /etc/fstab
192.168.10.100:/opt/cc /var/www/html nfs defaults._netdev 0 0
[root@web2 network-scripts]# cd /var/www/html/
[root@web2 html]# ls
[root@web2 html]# vim index.html
[root@web2 html]# cat index.html
<head>this is cc web</head>
1.安裝環(huán)境包
[root@localhost ~]# hostnamectl set-hostname lvs
[root@localhost ~]# su
[root@lvs ~]# yum install -y ipvsadm
已加載插件:fastestmirror, langpacks
Loading mirror speeds from cached hostfile
* base: mirrors.aliyun.com
* extras: mirrors.163.com
* updates: mirrors.tuna.tsinghua.edu.cn
正在解決依賴關(guān)系
--> 正在檢查事務(wù)
---> 軟件包 ipvsadm.x86_64.0.1.27-7.el7 將被 安裝
--> 解決依賴關(guān)系完成
依賴關(guān)系解決
=======================================================================================
Package 架構(gòu) 版本 源 大小
=======================================================================================
正在安裝:
ipvsadm x86_64 1.27-7.el7 base 45 k
事務(wù)概要
=======================================================================================
安裝 1 軟件包
總下載量:45 k
安裝大?。?5 k
Downloading packages:
警告:/var/cache/yum/x86_64/7/base/packages/ipvsadm-1.27-7.el7.x86_64.rpm: 頭V3 RSA/SHA256 Signature, 密鑰 ID f4a80eb5: NOKEY
ipvsadm-1.27-7.el7.x86_64.rpm 的公鑰尚未安裝
ipvsadm-1.27-7.el7.x86_64.rpm | 45 kB 00:00:00
從 file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7 檢索密鑰
導(dǎo)入 GPG key 0xF4A80EB5:
用戶ID : "CentOS-7 Key (CentOS 7 Official Signing Key) <security@centos.org>"
指紋 : 6341 ab27 53d7 8a78 a7c2 7bb1 24c6 a8a7 f4a8 0eb5
軟件包 : centos-release-7-4.1708.el7.centos.x86_64 (@anaconda)
來自 : /etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
正在安裝 : ipvsadm-1.27-7.el7.x86_64 1/1
驗(yàn)證中 : ipvsadm-1.27-7.el7.x86_64 1/1
已安裝:
ipvsadm.x86_64 0:1.27-7.el7
完畢!
2.配置雙網(wǎng)卡
添加網(wǎng)卡,然后進(jìn)行設(shè)置
[root@lvs ~]# cd /etc/sysconfig/network-scripts/
[root@lvs network-scripts]# ls
ifcfg-ens33 ifdown-isdn ifup ifup-plip ifup-tunnel
ifcfg-lo ifdown-post ifup-aliases ifup-plusb ifup-wireless
ifdown ifdown-ppp ifup-bnep ifup-post init.ipv6-global
ifdown-bnep ifdown-routes ifup-eth ifup-ppp network-functions
ifdown-eth ifdown-sit ifup-ib ifup-routes network-functions-ipv6
ifdown-ib ifdown-Team ifup-ippp ifup-sit
ifdown-ippp ifdown-TeamPort ifup-ipv6 ifup-Team
ifdown-ipv6 ifdown-tunnel ifup-isdn ifup-TeamPort
[root@lvs network-scripts]# vim ifcfg-ens33
[root@lvs network-scripts]# cp -p ifcfg-ens33 ifcfg-ens36
#配置網(wǎng)卡后重啟網(wǎng)絡(luò)
[root@lvs network-scripts]# systemctl restart network
兩個(gè)網(wǎng)卡信息如下:
[root@lvs network-scripts]# ifconfig
ens33: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 10.0.0.1 netmask 255.255.255.0 broadcast 10.0.0.255
inet6 fe80::7eb1:2dde:8a54:6927 prefixlen 64 scopeid 0x20<link>
ether 00:0c:29:56:d3:4a txqueuelen 1000 (Ethernet)
RX packets 397693 bytes 574961333 (548.3 MiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 92656 bytes 5683776 (5.4 MiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
ens36: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.10.1 netmask 255.255.255.0 broadcast 192.168.10.255
inet6 fe80::e638:fc7c:8a5b:dc5d prefixlen 64 scopeid 0x20<link>
ether 00:0c:29:56:d3:54 txqueuelen 1000 (Ethernet)
RX packets 51 bytes 6809 (6.6 KiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 83 bytes 13712 (13.3 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
3.測(cè)試是否互通
root@lvs network-scripts]# ping 192.168.10.10
PING 192.168.10.10 (192.168.10.10) 56(84) bytes of data.
64 bytes from 192.168.10.10: icmp_seq=1 ttl=64 time=0.552 ms
64 bytes from 192.168.10.10: icmp_seq=2 ttl=64 time=0.299 ms
64 bytes from 192.168.10.10: icmp_seq=3 ttl=64 time=0.255 ms
^C
--- 192.168.10.10 ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2001ms
rtt min/avg/max/mdev = 0.255/0.368/0.552/0.132 ms
[root@lvs network-scripts]# ping 192.168.10.20
PING 192.168.10.20 (192.168.10.20) 56(84) bytes of data.
64 bytes from 192.168.10.20: icmp_seq=1 ttl=64 time=0.536 ms
64 bytes from 192.168.10.20: icmp_seq=2 ttl=64 time=0.340 ms
^C
--- 192.168.10.20 ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 1000ms
rtt min/avg/max/mdev = 0.340/0.438/0.536/0.098 ms
4.開啟路由轉(zhuǎn)發(fā)功能
[root@lvs network-scripts]# vim /etc/sysctl.conf #末尾加上
root@lvs network-scripts]# cat /etc/sysctl.conf
# sysctl settings are defined through files in
# /usr/lib/sysctl.d/, /run/sysctl.d/, and /etc/sysctl.d/.
#
# Vendors settings live in /usr/lib/sysctl.d/.
# To override a whole file, create a new file with the same in
# /etc/sysctl.d/ and put new settings there. To override
# only specific settings, add a file with a lexically later
# name in /etc/sysctl.d/ and put new settings there.
#
# For more information, see sysctl.conf(5) and sysctl.d(5).
net.ipv4.ip_forward=1
5.設(shè)置防火墻及其規(guī)則
[root@lvs network-scripts]# systemctl status firewalld.service
● firewalld.service - firewalld - dynamic firewall daemon
Loaded: loaded (/usr/lib/systemd/system/firewalld.service; enabled; vendor preset: enabled)
Active: active (running) since 四 2020-02-20 09:34:20 CST; 8min ago
Docs: man:firewalld(1)
此時(shí)防火墻是開啟狀態(tài),不需要將其關(guān)閉,我們可以使用iptables進(jìn)行設(shè)置
#清空轉(zhuǎn)發(fā)表
[root@lvs network-scripts]# iptables -F
#清空nat地址轉(zhuǎn)發(fā)表
[root@lvs network-scripts]# iptables -t nat -F
#配置轉(zhuǎn)發(fā)規(guī)則(四表五鏈)
[root@lvs network-scripts]# iptables -t nat -A POSTROUTING -o ens33 -s 192.168.10.0/24 -j SNAT --to-source 10.0.0.1
#加載路由轉(zhuǎn)發(fā)功能
[root@lvs network-scripts]# sysctl -p
net.ipv4.ip_forward = 1
6.加載LVS內(nèi)核模塊
[root@lvs network-scripts]# modprobe ip_vs #加載命令
[root@lvs network-scripts]# cat /proc/net/ip_vs #查看
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
-> RemoteAddress:Port Forward Weight ActiveConn InActConn
[root@lvs network-scripts]# systemctl start ipvsadm
Job for ipvsadm.service failed because the control process exited with error code. See "systemctl status ipvsadm.service" and "journalctl -xe" for details.
#Centos7系統(tǒng)需要使用--save保存
[root@lvs network-scripts]# ipvsadm --save > /etc/sysconfig/ipvsadm
[root@lvs network-scripts]# systemctl start ipvsadm
7.定義腳本
[root@lvs network-scripts]# cd /opt/
[root@lvs opt]# vim nat.sh
[root@lvs opt]# chmod 777 nat.sh
[root@lvs opt]# ./nat.sh
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
-> RemoteAddress:Port Forward Weight ActiveConn InActConn
TCP lvs:http rr
-> 192.168.10.10:http Masq 1 0 0
-> 192.168.10.20:http Masq 1 0 0
nat.sh的腳本如下:
#!/bin/bash
#echo "1" > /proc/sys/net/ipv4/ip_forward 這里之前設(shè)置過,所以注釋了
ipvsadm -C #初始化
ipvsadm -A -t 10.0.0.1:80 -s rr #指定訪問入口,rr指定的是輪循算法
ipvsadm -a -t 10.0.0.1:80 -r 192.168.10.10:80 -m #建立ip地址映射關(guān)系
ipvsadm -a -t 10.0.0.1:80 -r 192.168.10.20:80 -m
ipvsadm #開啟
我們可以用win10虛擬機(jī)或者一臺(tái)Centos7客戶機(jī)測(cè)試
但是都需要進(jìn)行網(wǎng)卡設(shè)置,設(shè)置為僅主機(jī)模式且ip地址為10.0.0.10(10.0.0.0網(wǎng)段就行),網(wǎng)關(guān)為lvs負(fù)載均衡器外網(wǎng)口ip地址,在客戶端的瀏覽器中訪問的也是這個(gè)地址;測(cè)試結(jié)果的圖如下所示:
1.網(wǎng)卡和網(wǎng)絡(luò)測(cè)試
2.測(cè)試網(wǎng)站服務(wù)及輪循機(jī)制
訪問lvs外網(wǎng)網(wǎng)關(guān),lvs作為中間件或者說橋梁的角色,其實(shí)本質(zhì)上是訪問網(wǎng)站和存儲(chǔ)服務(wù)器
刷新訪問切換服務(wù)器
這邊在線網(wǎng)上實(shí)際上兩個(gè)存儲(chǔ)的頁(yè)面內(nèi)容是保持一致的,這里主要是為了測(cè)試輪循機(jī)制的效果,大家需要注意一下。
至此就是lvs負(fù)載均衡NAT模式的配置流程和測(cè)試方法,謝謝閱讀!
免責(zé)聲明:本站發(fā)布的內(nèi)容(圖片、視頻和文字)以原創(chuàng)、轉(zhuǎn)載和分享為主,文章觀點(diǎn)不代表本網(wǎng)站立場(chǎng),如果涉及侵權(quán)請(qǐng)聯(lián)系站長(zhǎng)郵箱:is@yisu.com進(jìn)行舉報(bào),并提供相關(guān)證據(jù),一經(jīng)查實(shí),將立刻刪除涉嫌侵權(quán)內(nèi)容。