Linux下羣集服務之LB集羣-lvs-nat模式

時間 2020-01-31

標籤 linux 羣集服務集羣 lvs nat 模式欄目 Linux 简体版

原文原文鏈接

O:\RHCA\羣集_Cluster\Linux下羣集服務之LB羣集-lvs-nat模式.docxhtml

Linux下羣集服務之lvs在企業網絡中的應用案例web

案例應用拓撲圖：vim

案例應用實現詳細步驟以下：服務器

1. Client-pc客戶端配置網絡

2. Director服務器配置dom

2.1 Director服務器ip地址配置ide

[root@junjie ~]# vim /etc/sysconfig/network-scripts/ifcfg-eth0

DEVICE=eth0

BOOTPROTO=none

ONBOOT=yes

NETMASK=255.255.255.0

IPADDR=10.106.6.254

GATEWAY=10.106.6.1

[root@junjie ~]# vim /etc/sysconfig/network-scripts/ifcfg-eth1oop

DEVICE=eth1

BOOTPROTO=none

ONBOOT=yes

NETMASK=255.255.255.0

IPADDR=192.168.1.1

[root@junjie ~]# service network restart測試

Shutting down interface eth0: [ OK ]

Shutting down interface eth1: [ OK ]

Shutting down loopback interface: [ OK ]url

Bringing up loopback interface: [ OK ]

Bringing up interface eth0: [ OK ]

Bringing up interface eth1: [ OK ]

[root@junjie ~]# ifconfig eth0

eth0 Link encap:Ethernet HWaddr 00:0C:29:66:E1:DA

inet addr:10.106.6.254 Bcast:10.106.6.255 Mask:255.255.255.0

[root@junjie ~]# ifconfig eth1

eth1 Link encap:Ethernet HWaddr 00:0C:29:66:E1:E4

inet addr:192.168.1.1 Bcast:192.168.1.255 Mask:255.255.255.0

[root@junjie ~]# hostname director.junjie.com #註銷從新登陸

2.2 開啓director數據包轉發能力

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

7 net.ipv4.ip_forward = 1

[root@director ~]# sysctl -p

net.ipv4.ip_forward = 1

2.3 配置本地yum服務器：

[root@director ~]# vim /etc/yum.repos.d/server.repo

[rhel-server]

name=Red Hat Enterprise Linux server

baseurl=file:///mnt/cdrom/Server/

enabled=1

gpgcheck=1

gpgkey=file:///mnt/cdrom/RPM-GPG-KEY-redhat-release

[rhel-cluster]

name=Red Hat Enterprise Linux cluster

baseurl=file:///mnt/cdrom/Cluster/

enabled=1

gpgcheck=1

gpgkey=file:///mnt/cdrom/RPM-GPG-KEY-redhat-release

[root@director ~]#mkdir /mnt/cdrom

[root@director ~]# mount /dev/cdrom /mnt/cdrom/

mount: block device /dev/cdrom is write-protected, mounting read-only

[root@director ~]#yum list all

2.4 安裝配置dircetor服務器：

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

[root@director ~]# ipvsadm -ln

IP Virtual Server version 1.2.1 (size=4096)

Prot LocalAddress:Port Scheduler Flags

-> RemoteAddress:Port Forward Weight ActiveConn InActConn

[root@director ~]# ipvsadm -A -t 10.106.6.254:80 -s wrr

[root@director ~]# ipvsadm -a -t 10.106.6.254:80 -r 192.168.1.2 -m -w 1

[root@director ~]# ipvsadm -a -t 10.106.6.254:80 -r 192.168.1.3 -m -w 2

[root@director ~]# ipvsadm -ln

IP Virtual Server version 1.2.1 (size=4096)

Prot LocalAddress:Port Scheduler Flags

-> RemoteAddress:Port Forward Weight ActiveConn InActConn

TCP 10.106.6.254:80 wrr

-> 192.168.1.3:80 Masq 2 0 0

-> 192.168.1.2:80 Masq 1 0 0

[root@director ~]# service ipvsadm save

Saving IPVS table to /etc/sysconfig/ipvsadm: [ OK ]

[root@director ~]# service ipvsadm start

Clearing the current IPVS table: [ OK ]

Applying IPVS configuration: [ OK ]

3. 配置real-server-1的web服務器：

3.1 ip地址配置

[root@junjie ~]# hostname r1.junjie.com

註銷從新登陸

[root@r1 ~]# vim /etc/sysconfig/network-scripts/ifcfg-eth0

DEVICE=eth0

BOOTPROTO=none

ONBOOT=yes

HWADDR=00:0c:29:1b:f1:ba

NETMASK=255.255.255.0

IPADDR=192.168.1.2

GATEWAY=192.168.1.1

[root@r1 ~]# service network restart

Shutting down interface eth0: [ OK ]

Shutting down loopback interface: [ OK ]

Bringing up loopback interface: [ OK ]

Bringing up interface eth0: [ OK ]

3.2 配置本地yum服務器：

[root@r1 ~]# vim /etc/yum.repos.d/server.repo

[rhel-server]

name=Red Hat Enterprise Linux server

baseurl=file:///mnt/cdrom/Server/

enabled=1

gpgcheck=1

gpgkey=file:///mnt/cdrom/RPM-GPG-KEY-redhat-release

[root@ r1 ~]#mkdir /mnt/cdrom

[root@r1 ~]# mount /dev/cdrom /mnt/cdrom/

mount: block device /dev/cdrom is write-protected, mounting read-only

[root@r1 ~]#yum list all

3.3 Real-server-1的Web服務器：

[root@r1 ~]# rpm -ivh /mnt/cdrom/Server/httpd-2.2.3-31.el5.i386.rpm

warning: /mnt/cdrom/Server/httpd-2.2.3-31.el5.i386.rpm: Header V3 DSA signature: NOKEY, key ID 37017186

Preparing... #################################### [100%]

1:httpd ########################################### [100%]

[root@r1 ~]#echo "web1" > /var/www/html/index.html

[root@r1 ~]# service httpd start

Starting httpd: httpd: apr_sockaddr_info_get() failed for r1.junjie.com

httpd: Could not reliably determine the server's fully qualified domain name, using 127.0.0.1 for ServerName

[ OK ]

3.4 客戶端訪問real-server-1的web服務：（使用vmnet1）

4. 配置real-server2的web服務器：

4.1 ip地址配置

[root@junjie ~]# hostname r2.junjie.com

註銷從新登陸

[root@r2 ~]# vim /etc/sysconfig/network-scripts/ifcfg-eth0

DEVICE=eth0

BOOTPROTO=none

ONBOOT=yes

HWADDR=00:0c:29:1b:f1:ba

NETMASK=255.255.255.0

IPADDR=192.168.1.3

GATEWAY=192.168.1.1

[root@r2 ~]# service network restart

Shutting down interface eth0: [ OK ]

Shutting down loopback interface: [ OK ]

Bringing up loopback interface: [ OK ]

Bringing up interface eth0: [ OK ]

4.2 配置本地yum服務器：

[root@r2 ~]# vim /etc/yum.repos.d/server.repo

[rhel-server]

name=Red Hat Enterprise Linux server

baseurl=file:///mnt/cdrom/Server/

enabled=1

gpgcheck=1

gpgkey=file:///mnt/cdrom/RPM-GPG-KEY-redhat-release

[root@r2 ~]#mkdir /mnt/cdrom

[root@r2 ~]# mount /dev/cdrom /mnt/cdrom/

mount: block device /dev/cdrom is write-protected, mounting read-only

[root@r2 ~]#yum list all

4.3 Real-server-2的Web服務器：

[root@r2 ~]# rpm -ivh /mnt/cdrom/Server/httpd-2.2.3-31.el5.i386.rpm

warning: /mnt/cdrom/Server/httpd-2.2.3-31.el5.i386.rpm: Header V3 DSA signature: NOKEY, key ID 37017186

Preparing... #################################### [100%]

1:httpd ########################################### [100%]

[root@r2 ~]#echo "web2" > /var/www/html/index.html

[root@r2 ~]# service httpd start

Starting httpd: httpd: apr_sockaddr_info_get() failed for r2.junjie.vom

httpd: Could not reliably determine the server's fully qualified domain name, using 127.0.0.1 for ServerName

[ OK ]

4.4 客戶端訪問real-server-2的web服務：（使用vmnet1）

5. 客戶端測試：wrr

5.1 客戶端訪問director的羣集服務服務：（網卡使用橋接模式）http：//10.106.6.254

5.2 客戶端不斷刷新，發現出現2次web2，一次web1界面，說明按權重輪詢

5.3 在director上查看信息以下：輪詢調度比幾乎爲2:1

[root@director ~]# ipvsadm -ln

IP Virtual Server version 1.2.1 (size=4096)

Prot LocalAddress:Port Scheduler Flags

-> RemoteAddress:Port Forward Weight ActiveConn InActConn

TCP 10.106.6.254:80 wrr

-> 192.168.1.2:80 Masq 1 0 12

-> 192.168.1.3:80 Masq 2 0 24

5.4 客戶端測試-2：rr

[root@director ~]# ipvsadm –C #首先清空之前配置

[root@director ~]# ipvsadm -ln

IP Virtual Server version 1.2.1 (size=4096)

Prot LocalAddress:Port Scheduler Flags

-> RemoteAddress:Port Forward Weight ActiveConn InActConn

[root@director ~]# ipvsadm -A -t 10.106.6.254:80 -s rr

[root@director ~]# ipvsadm -a -t 10.106.6.254:80 -r 192.168.1.2 -m

[root@director ~]# ipvsadm -a -t 10.106.6.254:80 -r 192.168.1.3 –m

[root@director ~]# ipvsadm -ln

IP Virtual Server version 1.2.1 (size=4096)

Prot LocalAddress:Port Scheduler Flags

-> RemoteAddress:Port Forward Weight ActiveConn InActConn

TCP 10.106.6.254:80 rr

-> 192.168.1.3:80 Masq 1 0 0

-> 192.168.1.2:80 Masq 1 0 0

[root@director ~]# service ipvsadm save

Saving IPVS table to /etc/sysconfig/ipvsadm: [ OK ]

[root@director ~]# service ipvsadm restart

Clearing the current IPVS table: [ OK ]

Applying IPVS configuration: [ OK ]

客戶端訪問director的羣集服務服務：（網卡使用橋接模式）http：//10.106.6.254

客戶端不斷刷新，發現web2和web1交替出現，比率爲1:1，說明依次輪詢rr

在director上查看信息以下：輪詢調度比幾乎爲1:1；

說明lvs調度方法是用的是RR模式

[root@director ~]# ipvsadm -ln

IP Virtual Server version 1.2.1 (size=4096)

Prot LocalAddress:Port Scheduler Flags

-> RemoteAddress:Port Forward Weight ActiveConn InActConn

TCP 10.106.6.254:80 rr

-> 192.168.1.2:80 Masq 1 0 15

-> 192.168.1.3:80 Masq 1 0 15

《完》

關於Linux下集羣服務簡介和lvs的詳解請參看個人博客：

http://xjzhujunjie.blog.51cto.com/3582724/850650

--xjzhujunjie

--2012/05/03

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