Linux下群集服务之LB集群-lvs-nat模式

O:\RHCA\群集_Cluster\Linux下群集服务之LB群集-lvs-nat模式.docx

Linux下群集服务之lvs在企业网络中的应用案例

案例应用拓扑图：

案例应用实现详细步骤如下：

1. Client-pc客户端配置

2. Director服务器配置

2.1 Director服务器ip地址配置

[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-eth1

DEVICE=eth1

IPADDR=192.168.1.1

[root@junjie ~]# service network restart

Shutting down interface eth0: [ OK ]

Shutting down interface eth1: [ OK ]

Shutting down loopback interface: [ OK ]

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 #注销重新登录

2.2 开启director数据包转发能力

[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服务器：

[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/

[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 安装配置dircetor服务器：

[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

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服务器：

3.1 ip地址配置

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

注销重新登录

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

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

IPADDR=192.168.1.2

GATEWAY=192.168.1.1

[root@r1 ~]# service network restart

Bringing up interface eth0: [ OK ]

3.2 配置本地yum服务器：

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

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

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

[root@r1 ~]#yum list all

3.3 Real-server-1的Web服务器：

[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 客户端访问real-server-1的web服务：（使用vmnet1）

4. 配置real-server2的web服务器：

4.1 ip地址配置

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

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

IPADDR=192.168.1.3

[root@r2 ~]# service network restart

4.2 配置本地yum服务器：

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

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

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

[root@r2 ~]#yum list all

4.3 Real-server-2的Web服务器：

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

[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

[ OK ]

4.4 客户端访问real-server-2的web服务：（使用vmnet1）

5. 客户端测试：wrr

5.1 客户端访问director的群集服务服务：（网卡使用桥接模式）http：//10.106.6.254

5.2 客户端不断刷新，发现出现2次web2，一次web1界面，说明按权重轮询

5.3 在director上查看信息如下：轮询调度比几乎为2:1

-> 192.168.1.2:80 Masq 1 0 12

-> 192.168.1.3:80 Masq 2 0 24

5.4 客户端测试-2：rr

[root@director ~]# ipvsadm –C #首先清空以前配置

[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

TCP 10.106.6.254:80 rr

-> 192.168.1.3:80 Masq 1 0 0

[root@director ~]# service ipvsadm save

[root@director ~]# service ipvsadm restart

客户端访问director的群集服务服务：（网卡使用桥接模式）http：//10.106.6.254

客户端不断刷新，发现web2和web1交替出现，比率为1:1，说明依次轮询rr

在director上查看信息如下：轮询调度比几乎为1:1；

说明lvs调度方法是用的是RR模式

-> 192.168.1.2:80 Masq 1 0 15

-> 192.168.1.3:80 Masq 1 0 15

《完》

关于Linux下集群服务简介和lvs的详解请参看我的博客：

<a href="http://xjzhujunjie.blog.51cto.com/3582724/850650">http://xjzhujunjie.blog.51cto.com/3582724/850650</a>

本文转自xjzhujunjie 51CTO博客，原文链接:http://blog.51cto.com/xjzhujunjie/850866

Linux下群集服务之LB集群-lvs-nat模式

继续阅读

debian9升级4.9.0内核到4.19.2内核过程

centOS7 配置 vsftpd 虚拟用户及权限Vsftpd配置虚拟用户及权限

linux-svn卸载与安装

vsftp虚拟多用户多权限一键部署脚本

Ubuntu14.04 LTS下安装mongodb

Nginx服务优化（1）——隐藏版本号、修改用户与组、网页缓存时间、日志切割、连接超时一、隐藏版本号二、修改用户与组三、配置Nginx网页缓存时间四、实现Nginx日志分割五、配置Nginx实现连接超时六、补充关于时间日期的命令

httpd服务的部署、启动、配置和简单优化一、部署二、启动三、配置文件

配置网页内容访问

手动安装Intel network I217-LM网卡的Linux驱动

禁止ubuntu系统弹出报错界面

Ubuntu Linux下Apache的配置文件

27 Best Free Eclipse Plug-ins for Java Developer to be ProductiveCode Quality PluginsText Editor PluginsDependency ManagementVersion Control Integration PluginsFramework Development Continuous Integration Related PluginsOther Utility Plugins

samba服务器的功能

【Linux】UDP广播报文接收速率问题

Linux设备模型（中）之上层容器

PowerPC平台 Linux移植三