前端两台DNS做主从复制及两台apache做负载均衡，实现LAMP的一台NFS+MySQL负载均衡访问，安装discuz软件。
httpd-2.4.10.tar.bz2
openlogic-mysql-5.6.10-linux-ia32-bin-glibc2.5-1.zip
php-5.4.13.tar.bz2
Discuz_X3.2_SC_UTF8.zip
主机A IP：192.168.100.100 搭建DNS服务器
主机B IP：192.168.100.101 搭建DNS服务器
主机C IP：192.168.100.102 安装apache和php
主机D IP：192.168.100.103 安装apache和php
主机E IP：192.168.100.104NFS服务器，MySQL服务器
域名：XUANZI.COM
实施规划：
主机E搭建的NFS服务器共享/shared目录，主机C和主机D将主机A共享的/shared目录挂载至本地的/www/xuanzi目录，当做Apache的DocumenRoot。当通过主机C的IP和主机D的IP以及其域名来访问页面时，页面内容要求一样。
在搭建DNS服务器时，主机名www.xuanzi.com有两个A记录，分别指向主机C的IP和主机D的IP。这样在浏览器输入www.xuanzi.com访问页面时，轮流解析到主机C和主机D的IP，这样便能达到负载均衡的效果。
主机A
1，DNS搭建
# yum -y install bind bind-utils
配置/etc/named.conf 文件
//
// named.conf
//
// Provided by Red Hat bind package to configure the ISC BIND named(8) DNS
// server as a caching only nameserver (as a localhost DNS resolver only).
//
// See /usr/share/doc/bind*/sample/ for example named configuration files.
//
options {
// listen-on port 53 { 127.0.0.1; };
listen-on-v6 port 53 { ::1; };
directory "/var/named";
dump-file "/var/named/data/cache_dump.db";
statistics-file "/var/named/data/named_stats.txt";
memstatistics-file "/var/named/data/named_mem_stats.txt";
allow-query { any; };
recursion yes;
// dnssec-enable yes;
// dnssec-validation yes;
/* Path to ISC DLV key */
// bindkeys-file "/etc/named.iscdlv.key";
// managed-keys-directory "/var/named/dynamic";
};
logging {
channel default_debug {
file "data/named.run";
"/etc/named.conf" 43L, 988C 26,1 Top
"/etc/named.rfc1912.zones"
allow-update { none; };
};
zone "localhost" IN {
type master;
file "named.localhost";
allow-update { none; };
};
zone "1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.ip6.arpa" IN {
type master;
file "named.loopback";
allow-update { none; };
};
zone "1.0.0.127.in-addr.arpa" IN {
type master;
file "named.loopback";
allow-update { none; };
};
zone "0.in-addr.arpa" IN {
type master;
file "named.empty";
allow-update { none; };
};
zone "xuanzi.com" IN {
type master;
file "xuanzi.com.zone";
};
zone "100.168.192.in-addr.arpa" IN {
"/etc/named.rfc1912.zones" 49L, 1075C
区域文件
$TTL 86400
$ORIGIN xuanzi.com.
@ IN SOA ns1.xuanzi.com. admin.xuanzi.com (
2017081402
1H
5M
7D
1D )
IN NS ns1
IN NS ns2
IN MX 10 mx1
ns1 IN A 192.168.100.100
ns2 IN A 192.168.100.101
mx1 IN A 192.168.100.106
www IN A 192.168.100.102
www IN A 192.168.100.103
pop3 IN CNAME mx1
从DNS服务器配置
"/etc/named.root.key"
//
// named.conf
//
// Provided by Red Hat bind package to configure the ISC BIND named(8) DNS
// server as a caching only nameserver (as a localhost DNS resolver only).
//
// See /usr/share/doc/bind*/sample/ for example named configuration files.
//
options {
// listen-on port 53 { 127.0.0.1; };
listen-on-v6 port 53 { ::1; };
directory "/var/named";
dump-file "/var/named/data/cache_dump.db";
statistics-file "/var/named/data/named_stats.txt";
memstatistics-file "/var/named/data/named_mem_stats.txt";
allow-query { any; };
recursion yes;
// dnssec-enable yes;
// dnssec-validation yes;
/* Path to ISC DLV key */
// bindkeys-file "/etc/named.iscdlv.key";
// managed-keys-directory "/var/named/dynamic";
};
logging {
channel default_debug {
file "data/named.run";
"/etc/named.conf" 43L, 988C 26,1 Top
反向区域文件
$TTL 86400
$ORIGIN 100.168.192.in-addr.arpa.
@ IN SOA ns1.xuanzi.com. admin.xuanzi.com (
2017081402
1H
5M
7D
1D )
IN NS ns1.xuanzi.com.
IN NS ns2.xuanzi.com.
100 IN PTR ns1.xuanzi.com.
101 IN PTR ns2.xuanzi.com.
102 IN PTR www.xuanzi.com.
103 IN PTR www.xuanzi.com.
106 IN PTR mx1.xuanzi.com.
imap IN PTR imap.xuanzi.com.
配置/etc/named.rfc1912.zones文件
file "named.localhost";
allow-update { none; };
};
zone "1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.ip6.arpa" IN {
type master;
file "named.loopback";
allow-update { none; };
};
zone "1.0.0.127.in-addr.arpa" IN {
type master;
file "named.loopback";
allow-update { none; };
};
zone "0.in-addr.arpa" IN {
type master;
file "named.empty";
allow-update { none; };
};
zone "xuanzi.com" IN {
type slave;
masters { 192.168.100.100; };
file "slaves/xuanzi.com.zone";
};
zone "100.168.192.in-addr.arpa" IN {
type slave;
masters { 192.168.100.100; };
file "slaves/192.168.100.zone";
};
"/etc/named.rfc1912.zones" 51L, 1149C 51,1 Bot
2，MySQL搭建
yum install mysql-server
# mysql
mysql> UPDATE user SET password=PASSWORD('xuanzi') WHERE USER='xuanzi';
mysql> GRANT ALL PRIVILEGES ON *.* TO root@'192.168.100.%' IDENTIFIED BY 'xuanzi';
mysql> FLUSH PRIVILEGES;
3，NFS配置
# mkdir /shared
# groupadd -g 500 xuanzi
# useradd -g 500 -u 500 xuanzi
# vim /etc/exportfs
/shared 192.168.100.0/24(rw,all_squash,anonuid=500,anongid=500)
# setfacl -m u:xuanzi:rwx /shared
主机C
主机C挂载NFS共享的/shared目录，执行以下命令：
# mkdir /www/xuanzi
# mount -t nfs 192.168.1.2:/shared /www/xuanzi
安装Apache
安装apr
# cd /usr/local
# tar xf apr-1.5.1.tar.bz2
# cd apr-1.5.1
# ./configure --prefix=/usr/local/apr
# make
# make install
安装apr-util
# ./configure --prefix=/usr/local/apr-util --with-apr=/usr/local/apr
# make
# make install
安装httpd
# tar xf httpd-2.4.10.tar.bz2
# cd httpd-2.4.10
# ./configure
--prefix=/usr/local/apache
--sysconfdir=/etc/httpd
--enable-so
--enable-rewrite
--enable-ssl
--enable-cgi
--enable-cgid
--enable-modules=most
--enable-mods-shared=most
--enable-mpms-shared=all
--with-mpm=event
--with-apr=/usr/local/apr
--with-apr-util=/usr/local/apr-util
出现错误：
configure: error: pcre-config for libpcre not found. PCRE is required anavailabl from
解决办法
# yum install -y pcre-devel
# make
# make install
提供SysV风格的启动脚本：/etc/init.d/httpd
#
# 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/functions
if [ -f /etc/sysconfig/httpd ]; then
. /etc/sysconfig/httpd
fi
# 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/apachectl
httpd=${HTTPD-/usr/local/apache/bin/httpd}
prog=httpd
pidfile=${PIDFILE-/var/run/httpd.pid}
lockfile=${LOCKFILE-/var/lock/subsys/httpd}
RETVAL=0
start() {
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 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 "$1" 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 $@
RETVAL=$?
;;
*)
echo $"Usage: $prog {start|stop|restart|condrestart|reload|status|fullstatus|graceful|help|configtest}"
exit 1
esac
exit $RETVAL
chmod +x /etc/init.d/httpd
chkconfig --add httpd
编辑/etc/profile.d/httpd.sh
1
PATH=$PATH:
/usr/local/apache/bin
# source /etc/profile.d/httpd.sh
# service httpd start
安装php
# cd php-5.4.13
# ./configure
--prefix=/usr/local/php
--with-mysql=mysqlnd
--with-mysqli=mysqlnd
--with-pdo-mysql=mysqlnd
--with-openssl
--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-config-file-path=/etc
--with-config-file-scan-dir=/etc/php.d
--with-bz2 --enable-maintainer-zts
出现错误：
configure: error: mcrypt.h not found. Please reinstall libmcrypt.
解决办法：
#yum -y install libmcrypt-devel mhash-devel
# make
# make install
提供php配置文件
cp php.ini-production /etc/php.ini
/etc/httpd/httpd.conf配置文件
AddType application/x-httpd-php .php
AddType application/x-httpd-php-source .phps
DirectoryIndex index.php index.html
注释掉
#/DocumentRoot "/usr/local/apache/htdocs"
取消注释
Include /etc/httpd/extra/httpd-vhosts.conf
主机C和主机D /etc/httpd/extra/httpd-vhosts.conf配置
<VirtualHost *:80>
DocumentRoot "/www/xuanzi"
<Directory "/www/xuanzi">
Options none
AllowOverride none
Require all granted
</Directory>
ServerName www.xuanzi.com
ErrorLog "/var/log/httpd/xuanzi.com_error.log"
CustomLog "/var/log/httpd/xuanzi.com_access.log" combined
</VirtualHost>
主机D
主机D和主机C配置相同，参考以上文档
*主机E **
Discuz论坛测试
# unzip Discuz_X3.2_SC_UTF8.zip
# cd upload/
# cp -R ./ /shared/
浏览器输入www.xuanzi.com即可配置安装Discuz了，要注意的是安装Discuz论坛时填入mysql服务器IP地址时，要填入192.168.1.104不能填入localhost。并且输入主机C的IP和输入主机D的IP访问的内容是相同的，比如主机C上发帖，用主机D的IP访问可以看到。
