Simple case for load balancing of two Web servers with Lvs-nat

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Case topology diagram

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Configuring Host 1

Installing Ipvsadm

# yum-y Install ipvsadm# ipvsadm-a-T 10.170.2.80:80-s rr# ipvsadm-a-t 10.170.2.80:80-r 192.168.3.101-m# ipvsadm-a -T 10.170.2.80:80-r 192.168.3.102-m# echo 1 >/proc/sys/net/ipv4/ip_forward

Configuring Subjects 2 and 3

Compiling and installing apr-1.5.0

# Tar XF apr-1.5.0.tar.bz2# cd apr-1.5.0#./configure--prefix=/usr/local/apr# make && make install

Compiling and installing apr-util-1.5.3

# tar XF apr-util-1.5.3.tar.bz2 # cd apr-util-1.5.3 #./configure--prefix=/usr/local/apr-util--WITH-APR=/USR/LOCAL/APR /# make && make install

Compiling and installing httpd-2.4.9

# tar XF httpd-2.4.9.tar.bz2 # cd httpd-2.4.9#./configure--prefix=/usr/local/apache--sysconfdir=/etc/httpd24-- Enable-so--enable-ssl--enable-cgi--enable-rewrite--with-zlib--with-pcre--with-apr=/usr/local/apr--with-apr- Util=/usr/local/apr-util--enable-modules=most--enable-mpms-shared=all--with-mpm=event# make && make Insta ll

Modify the httpd Master profile to set the path of the PID file

# vim/etc/httpd24/httpd.conf

Add a line below the ServerRoot "/usr/local/apache" line:

Pidfile "/var/run/httpd.pid"

SysV Service Script/etc/rc.d/init.d/httpd24 is provided, this file needs to be created

# VIM/ETC/RC.D/INIT.D/HTTPD24

#!/bin/bash## httpd        startup script for the  apache http server## chkconfig: - 85 15# description: apache  is a world wide web server.  it is used to serve  #        html files and cgi.# processname:  httpd# config: /etc/httpd/conf/httpd.conf# config: /etc/sysconfig/httpd#  Pidfile: /var/run/httpd.pid# source function library.  /etc/rc.d/init.d/functionsif [ -f /etc/sysconfig/httpd ]; then         . /etc/sysconfig/httpdfi# start httpd in the  c locale by default. httpd_lang=${httpd_lang-"C"}# this will prevent initlog from swallowing up  a pass-phrase Prompt if# mod_ssl needs a pass-phrase from the user. Initlog_args= "" # set httpd=/usr/sbin/httpd.worker in /etc/sysconfig/httpd to use  a server# with the thread-based  "Worker"  MPM; BE WARNED  That some modules may not# work correctly with a thread-based  MPM; notably PHP will refuse to start.# Path to the  Apachectl script, server binary, and short-form for messages.apachectl=/usr /local/apache/bin/apachectlhttpd=${httpd-/usr/local/apache/bin/httpd}prog=httpdpidfile=${pidfile-/var/run/ Httpd.pid}lockfile=${lockfile-/var/lock/subsys/httpd}retval=0start ()  {         echo -n $ "starting  $prog: "          lang= $HTTPD _lang daemon --pidfile=${pidfile}  $httpd   $OPTIONS         RETVAL=$?         echo        [  $RETVAL  =  0 ] && touch ${lockfile}         return  $RETVAL}stop ()  {  echo -n $ "stopping  $prog: "    killproc -p ${pidfile} -d 10  $httpd   retval=$?  echo  [   $RETVAL  = 0 ] && rm -f ${lockfile} ${pidfile}}reload ()  {    echo -n $ "reloading  $prog: "     if  ! lang= $HTTPD _lang  $httpd   $OPTIONS  -t >&/dev/null; then         retval=$?        echo $ "not  reloading due to&Nbsp;configuration syntax error "        failure $" not  reloading  $httpd  due to configuration syntax error "     else        killproc -p ${pidfile}  $httpd  - hup        retval=$?    fi     echo}# see how we were called.case  "$"  in  start)    start  ;;   stop)   stop  ;;   status)         status -p ${pidfile}  $httpd   RETVAL=$?  ;;   restart)   stop  start  ;;   condrestart)   if [ -f ${pidfile} ] ; then     stop    start  fi  ;;   reload)         reload  ;;   graceful|help|configtest|fullstatus)    $apachectl  [email protected]   retval=$?  ;;   *)   echo $ "usage:  $prog  {start|stop|restart|condrestart|reload|status| Fullstatus|graceful|help|configtest} "  exit 1esacexit  $RETVAL

# chmod +X/ETC/RC.D/INIT.D/HTTPD24 # chkconfig--add httpd24# chkconfig httpd24 on

Start the HTTP24 service and test

# service HTTPD24 Start

Add different pages on host 2 and host 3

Host 2

# vim/usr/local/apache/htdocs/test.html 
Host 3
# vim/usr/local/apache/htdocs/test.html 
Type 10.170.2.80/test.html in the browser and refresh to get different results
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Compiling and installing php-5.4.26
# Tar XF php-5.4.26.tar.bz2# cd php-5.4.26#./configure--prefix=/usr/local/php--with-mysql=mysqlnd--with-openssl-- With-mysqli=mysqlnd--enable-mbstring--with-freetype-dir--with-jpeg-dir--with-png-dir--with-zlib-- WITH-LIBXML-DIR=/USR--enable-xml--enable-sockets--with-apxs2=/usr/local/apache/bin/apxs--with-mcrypt--with-con Fig-file-path=/etc--with-config-file-scan-dir=/etc/php.d--with-bz2--enable-maintainer-zts# make && do in Stall
Provide a configuration file for PHP
# CP Php.ini-production/etc/php.ini
Edit the httpd configuration file to support PHP
# vim/etc/httpd24/httpd.conf
Add the following two lines below the AddType application/x-gzip. GZ tgz Line: AddType application/x-httpd-php. Phpaddtype application/ X-httpd-php-source. Phps DirectoryIndex index.html This line to: DirectoryIndex index.php index.html
Add a test page to host 2 and host 3
Host 2
# vim/usr/local/apache/htdocs/index.php 
Host 3
# vim/usr/local/apache/htdocs/index.php 
Restart the HTTPD24 service for Host 2 and host 3
# Service HTTPD24 Restart
Type 10.170.2.80 in the browser, refresh to get different results
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Configuring host 4

 
  
 
Compiling and installing mariadb-5.5.36
# tar XF mariadb-5.5.36-linux-x86_64.tar.gz-c/usr/local# cd/usr/local/# ln-sv mariadb-5.5.36-linux-x86_64/mysql# Mkdi r-pv/mysql/data# groupadd-r mysql# useradd-g mysql-s/sbin/nologin-m-d/mysql/data-r mysql# chown-r mysql:mysql/ mysql# Chown-r Mysql:mysql/mysql/data
To provide a configuration file for the database:
# CD mysql# mkdir/etc/mysql# chown-r root.mysql./*# cp support-files/my-large.cnf/etc/mysql/my.cnf Modify File/etc/mysql/my.c NF file content, add a line under Thread_concurrency = 8 line: DataDir =/mysql/data
Provide a SysV startup script for the database and set it to boot:
# CP support-files/mysql.server/etc/init.d/mysqld# chkconfig--add mysqld# chkconfig mysqld on
Initialize the database and start the database:
# echo "Export Path=/usr/local/mysql/bin: $PATH" >/etc/profile.d/mysql.sh# source/etc/profile.d/mysql.sh # echo "/ Usr/local/mysql/lib ">/etc/ld.so.conf.d/mysql.conf# ldconfig# ln-sv/usr/local/mysql/include//usr/include/mysql # scripts/mysql_install_db--user=mysql--datadir=/mysql/data/#/etc/init.d/mysqld start
Create a database and authorize:
MariaDB [(None)]> CREATE DATABASE discuz; MariaDB [(None)]> GRANT all on discuz.* to [e-mail protected] ' 192.168.3.% ' identified by ' dscpass '; MariaDB [(None)]> FLUSH privileges;
Start the NFS sharing service
# useradd-u discuz# vim/etc/exports/var/www/html 192.168.3.0/24 (rw,no_root_squash) #/etc/init.d/rpcbind start#/ Etc/init.d/nfs start#/etc/init.d/nfslock Start
Unzip the DISCUZ_X2.5_SC_GBK to/var/www/html and modify the permissions
# unzip Discuz_x2.5_sc_gbk.zip. # CD upload# chmod-r go+w config# chmod-r go+w data# chmod-r go+w uc_*
Build a test environment and test

 
  
 
Related configuration on Host 2 and host 3
# useradd-u discuz# mount-f NFS 192.168.3.36:/var/www/html/usr/local/apache/htdocs
Type 10.170.2.80/upload in the browser to get the Installation Discuz forum page
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Click "I agree"-click "Next"-click "Next"-based on the database authorization information, fill in "Install Database Contents" and then click "Next"-after the successful installation of the database, click on "Temporarily not open" on the displayed page to get the forum page
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Simple case for load balancing of two Web servers with Lvs-nat