net25-第17周作业

栏目: 服务器 · 发布时间: 6年前

内容简介:net25-第17周作业

1、结合图形描述LVS的工作原理;

net25-第17周作业

lvs-nat模型,相当于多目标的dnat,通过将请求报文中的目标地址和目标端口修改为调度出的rs的rip和port来实现转发,整个请求如下:

cip -> vip -> vs(nat转换) -> rip  请求

rip -> dip(默认网关) -> vs(nat转换) ->  cip  响应

net25-第17周作业

lvs-dr模型,通过请求报文的重新封装一个mac地址进行转发;源mac是dip所在的接口的mac,目标mac是挑选出某rs的rip所在接口的mac地址,ip首部不会放生变化(cip<==>vip)

cip->vs(vip)->rs(vip) 请求

client_mac -> vs(vip_mac) -> rs(rs_mac) 请求

rs(vip) -> cip 响应

rs(rs_mac) -> client_mac  响应

net25-第17周作业

lvs-tun,转发方式不修改请求报文的ip首部(源ip为cip,目标为vip),而是在原ip首部之外再封装一个ip首部(源ip为dip,目标ip为挑选的rip):

net25-第17周作业

lvs-fullnat通过修改报文的源代码的源ip(cip->dip)和目标地址(vip->rip)来进行转发。

2、搭建一套LVS-DR模型的高性能集群,并实现以下功能:

(1)、wordpress程序通过nfs共享给各个realserver;

(2)、后端realserver中的nginx和 php 分离

nfs server

nfs server

~]# yum install -y nfs

~]# mkdir /mysqldata

~]# mkdir /www

~]# chown -R apache.apache /www

~]# chown -R mysql.mysql /mysqldata

~]# vim /etc/exports

/mysqldata 10.211.55.0/24(rw,sync,no_root_squash)

/www 10.211.55.0/24(rw,sync,no_root_squash)

~]# service nfs start

real server

~]# echo 1 > /proc/sys/net/ipv4/conf/all/arp_ignore

~]# echo 1 > /proc/sys/net/ipv4/conf/lo/arp_ignore

~]# echo 2 > /proc/sys/net/ipv4/conf/all/arp_announce

~]# echo 2 > /proc/sys/net/ipv4/conf/lo/arp_announce

~]# ifconfig lo:0 10.37.129.24 netmask 255.255.255.255 broadcast 10.37.129.24

~]# route add -host 10.37.129.24 dev lo:0

~]# vim /etc/yum.repo.d/epel.repo

[epel]

name=epel

baseurl=http://mirrors.aliyun.com/epel/6Server/x86_64/

enable=1

gpgcheck=0

~]#yum install -y nginx

~]#yum install -y php-fpm

~]#yum install -y mysql-server

~]# mount -t nfs 10.211.55.39:/mysqldata /mysqldata

~]# ll -d /mysqldata

~]# mysql_install_db –datadir=/mysqldata –user=mysql

~]# service mysqld start

~]# mount -t nfs 10.211.55.39:/www /www

~]# tar xf wordpress.tar.gz -C /www

~]#vim /etc/nginx/nginx.conf

server {

listen 80;

server_name blog.jusene.com;

index index.html index.php;

root /www;

location \ {

proxy_pass 129.0.0.1:9000;

fastcgi_index index.php;

include fastcgi.conf;

}

}

~]# service php-fpm start

~]# service nginx start

lvs 配置

~]# yum install -y ipvsadm

~]# ifconfig eth0:0 10.37.129.24 netmask 255.255.255.0 broadcast 10.37.129.24

~]# route add -host 10.37.129.24 dev eth0:0

~]# ipvsadm -A -t 10.37.129.24 -s sh

~]# ipvsadm -a -t 10.37.129.24 -r 10.37.129.10:80 -g

~]# ipvsadm -a -t 10.37.129.24 -r 10.37.129.11:80 -g

3、基于heartbeat v2 crm实现HA LAMP组合;要求,部署wordpress,用于编辑的文章中的任何数据在节点切换后都能正常访问;

nfs server

~]# yum install -y nfs

~]# mkdir /mysqldata

~]# mkdir /www

~]# chown -R apache.apache /www

~]# chown -R mysql.mysql /mysqldata

~]# vim /etc/exports

/mysqldata 10.211.55.0/24(rw,sync,no_root_squash)

/www 10.211.55.0/24(rw,sync,no_root_squash)

~]# service nfs start

node 1

~]# yum install -y showmount httpd php mysql-server

~]# showmount -e 10.211.55.39

Export list for 10.211.55.39:

/mysqldata 10.211.55.0/24

/www 10.211.55.0/24

~]# mkdir /mysqldata

~]# mount -t nfs 10.211.55.39:/mysqldata /mysqldata

~]# ll -d /mysqldata

~]# mysql_install_db –datadir=/mysqldata –user=mysql

~]# service mysqld start

~]# mount -t nfs 10.211.55.39:/www /var/www/html

~]# tar xf wordpress.tar.gz -C /var/www/html

~]# mysql

Welcome to the MySQL monitor. Commands end with ; or \g.

Your MySQL connection id is 2

Server version: 5.1.73 Source distribution

Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its

affiliates. Other names may be trademarks of their respective

owners.

Type ‘help;’ or ‘\h’ for help. Type ‘\c’ to clear the current input statement.

mysql> create database wordpress;

Query OK, 1 row affected (0.04 sec)

mysql> grant all on wordpress.* to wordpress@’10.211.55.63′ identified by ‘wordpress’;

Query OK, 0 rows affected (0.00 sec)

~]# service httpd start

~]# service httpd stop

~]# service mysqld stop

node 2

~]# yum install -y showmount httpd php mysql-server

~]# mkdir /mysqldata

~]# mount -t nfs 10.211.55.39:/mysqldata /mysqldata

~]# ll -d /mysqldata

~]# service mysqld start

~]# mount -t nfs 10.211.55.39:/www /var/www/html

~]# service mysqld start

~]# service httpd start

~]# service httpd stop

~]# service mysqld stop

heartbeat配置

~]# yum install -y pygtk2-libglade net-snmp-libs libnet httpd

~]# rpm -ivh heartbeat-gui-2.1.4-12.el6.x86_64.rpm heartbeat-2.1.4-12.el6.x86_64.rpm heartbeat-pils-2.1.4-12.el6.x86_64.rpm heartbeat-stonith-2.1.4-12.el6.x86_64.rpm

~]#cd /etc/ha.d/

~]#cp /usr/share/doc/heartbeat-2.1.4/{ha.cf,authkeys,haresources} .

~]#chmod 600 authkeys

~]#cat authkeys

auth 2

1 crc

2 sha1 HI!@@@

3 md5 Hello!

~]#vim /etc/ha.d/ha.cf

logfile /var/log/ha-log

crm on

mcast eth0 225.0.12.1 694 1 0

ping 10.211.55.1

compression bz2

compression_threshold 2

其他默认即可

node2

~]#yum groupinstall -y ‘Development Tools’

~]# yum install -y pygtk2-libglade net-snmp-libs libnet httpd

~]# rpm -ivh heartbeat-gui-2.1.4-12.el6.x86_64.rpm heartbeat-2.1.4-12.el6.x86_64.rpm heartbeat-pils-2.1.4-12.el6.x86_64.rpm heartbeat-stonith-2.1.4-12.el6.x86_64.rpm

node1

~]#scp /etc/ha.d/{authkeys,ha.cf} node2:/etc/ha.cf

~]#service heartbeat start;ssh node2 ‘service heartbeat start’

echo “jusene” | passwd –stdin hacluster

~]#hb_gui

net25-第17周作业


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