Nginx 0.7.x + PHP 5.2.10(FastCGI)搭建支持高并发量的Web服务器

时间:2021-03-03 20:20:06

      Nginx ("engine x") 是一个高性能的 HTTP 和反向代理服务器,也是一个 IMAP/POP3/SMTP 代理服务器。 Nginx 是由 Igor Sysoev 为俄罗斯访问量第二的 Rambler.ru 站点开发的,它已经在该站点运行超过两年半了。Igor 将源代码以类BSD许可证的形式发布。

一、为什么选择Nginx
1、在高连接并发的情况下,Nginx是Apache服务器不错的替代品,能够支持高达 50,000 个并发连接数的响应, Nginx选择了 epoll and kqueue 作为开发模型。

2、 Nginx作为负载均衡服务器: Nginx 既可以在内部直接支持 Rails 和 PHP 程序对外进行服务, 也可以支持作为 HTTP代理服务器对外进行服务. Nginx采用C进行编写, 不论是系统资源开销还是CPU使用效率都比 Perlbal 要好很多。

3、作为邮件代理服务器: Nginx 同时也是一个非常优秀的邮件代理服务器。

为什么 Nginx的性能要比Apache高得多?这得益于Nginx使用了最新的epoll(Linux 2.6内核)和kqueue(freebsd)网络I/O模型,而Apache则使用的是传统的select模型。目前Linux下能够承受高并发访问的 Squid、Memcached都采用的是epoll网络I/O模型。其基本原理请见我的另一篇文章:Linux服务器网络开发模型

二、Nginx的安装以及配置
系统要求:Linux 2.6+ 内核,本文中的Linux操作系统为CentOS 5.2+
1、获取相关的开源程序:(适用CentOS操作系统)利用CentOS Linux系统自带的yum命令安装、升级所需的程序库。
yum -y install gcc gcc-c++ autoconf libjpeg libjpeg-devel libpng libpng-devel freetype freetype-devel libxml2 libxml2-devel zlib zlib-devel glibc glibc-devel glib2 glib2-devel bzip2 bzip2-devel ncurses ncurses-devel curl curl-devel e2fsprogs e2fsprogs-devel krb5 krb5-devel libidn libidn-devel openssl openssl-devel openldap openldap-devel nss_ldap openldap-clients openldap-servers

2、安装PHP 5.2.10(FastCGI模式)
编译安装PHP 5.2.10所需的支持库:
tar zxvf libiconv-1.13.tar.gz
cd libiconv-1.13/
./configure --prefix=/usr/local
make
make install
cd ../

tar zxvf libmcrypt-2.5.8.tar.gz
cd libmcrypt-2.5.8/
./configure
make
make install
/sbin/ldconfig
cd libltdl/
./configure --enable-ltdl-install
make
make install
cd ../../

tar zxvf mhash-0.9.9.9.tar.gz
cd mhash-0.9.9.9/
./configure
make
make install
cd ../

ln -s /usr/local/lib/libmcrypt.la /usr/lib/libmcrypt.la
ln -s /usr/local/lib/libmcrypt.so /usr/lib/libmcrypt.so
ln -s /usr/local/lib/libmcrypt.so.4 /usr/lib/libmcrypt.so.4
ln -s /usr/local/lib/libmcrypt.so.4.4.8 /usr/lib/libmcrypt.so.4.4.8
ln -s /usr/local/lib/libmhash.a /usr/lib/libmhash.a
ln -s /usr/local/lib/libmhash.la /usr/lib/libmhash.la
ln -s /usr/local/lib/libmhash.so /usr/lib/libmhash.so
ln -s /usr/local/lib/libmhash.so.2 /usr/lib/libmhash.so.2
ln -s /usr/local/lib/libmhash.so.2.0.1 /usr/lib/libmhash.so.2.0.1

tar zxvf mcrypt-2.6.8.tar.gz
cd mcrypt-2.6.8/
/sbin/ldconfig
./configure
make
make install
cd ../

3、编译安装MySQL 5.1.38

/usr/sbin/groupadd mysql           // 建立mysql组
/usr/sbin/useradd -g mysql mysql   // 建立mysql用户并且加入到mysql组中

tar zxvf mysql-5.1.38.tar.gz

cd mysql-5.1.38/

./configure --prefix=/usr/local/webserver/mysql/ --enable-thread-safe-client

make && make install

cp /usr/local/src/mysql/support-files/my-medium.cnf /etc/my.cnf 在 support-files目录下有4个模版文件,我们选择其中一个座位Mysql的配置文件,覆盖/etc/my.cnf(系统默认的配置,其中设置了性能参数和Mysql的一些路径参数);

cd /usr/local/mysql    //进入mysql目录

/usr/local/webserver/mysql/bin/mysql_install_db --basedir=/usr/local/webserver/mysql --datadir=/usr/local/webserver/mysql/data --user=mysql  //初试化表并且规定用mysql用户来访问。初始化表以后就开始给mysql和root用户设定访问权限;

chown -R root .      //设定root能访问/usr/local/mysql;

chown -R mysql data  //设定mysql用户能访问/usr/local/mysql/data ,里面存的是mysql的数据库文件.这个目录是在/etc/my.cnf中有配置,mysql_install_db时产生;

chown -R mysql data/.  //设定mysql用户能访问/usr/local/mysql/data/mysql下的所有文件;

chgrp -R mysql .   //(此处 .前面有空格哦)设定mysql组能够访问/usr/local/mysql;

/usr/local/mysql/bin/mysqld_safe --user=mysql &  //运行mysql;

/usr/local/src/mysql/bin/mysqladmin -u root password 'yourpassword' //MYSQL默认安装密码为空,为mysql设置密码,利用的是/usr/local/src/mysql/bin/下的mysqladmin文件;


启动MySQL服务:
    cp /usr/local/src/mysql/support-files/mysql.server /etc/init.d/mysql
    vi /etc/init.d/mysql
    修改如下定义使其内容为:
    basedir=/usr/local/webserver/mysql
    datadir=/usr/local/webserver/mysql/data

    chmod +x mysql   //赋予shell脚本可执行权限:
    chkconfig --level 345 mysql on
    service mysql restart
    Shutting down MySQL...                    [  OK  ]
    Starting MySQL                            [  OK  ]

连接:
   /usr/local/src/mysql/bin/mysql -u root -p
   Enter password:
   Welcome to the MySQL monitor.  Commands end with ; or /g.
   Your MySQL connection id is 5 to server version: 4.1.14-standard
   Type 'help;' or '/h' for help. Type '/c' to clear the buffer.
   mysql>

4、编译安装PHP(FastCGI模式)
tar zxvf php-5.2.10.tar.gz
gzip -cd php-5.2.10-fpm-0.5.11.diff.gz | patch -d php-5.2.10 -p1
cd php-5.2.10/
./configure --prefix=/usr/local/webserver/php --with-config-file-path=/usr/local/webserver/php/etc --with-mysql=/usr/local/webserver/mysql --with-mysqli=/usr/local/webserver/mysql/bin/mysql_config --with-iconv-dir=/usr/local --with-freetype-dir --with-jpeg-dir --with-png-dir --with-zlib --with-libxml-dir=/usr --enable-xml --disable-rpath --enable-discard-path --enable-safe-mode --enable-bcmath --enable-shmop --enable-sysvsem --enable-inline-optimization
--with-curl --with-curlwrappers --enable-mbregex --enable-fastcgi --enable-fpm --enable-force-cgi-redirect --enable-mbstring --with-mcrypt --with-gd --enable-gd-native-ttf --with-openssl --with-mhash --enable-pcntl --enable-sockets --with-ldap --with-ldap-sasl --with-xmlrpc --enable-zip --enable-soap --without-pear
make ZEND_EXTRA_LIBS='-liconv'
make install
cp php.ini-dist /usr/local/webserver/php/etc/php.ini
cd ../

5、编译安装 PHP5 扩展模块
tar zxvf memcache-2.2.5.tgz
cd memcache-2.2.5/
/usr/local/webserver/php/bin/phpize
./configure --with-php-config=/usr/local/webserver/php/bin/php-config
make
make install
cd ../

tar jxvf eaccelerator-0.9.5.3.tar.bz2
cd eaccelerator-0.9.5.3/
/usr/local/webserver/php/bin/phpize
./configure --enable-eaccelerator=shared --with-php-config=/usr/local/webserver/php/bin/php-config
make
make install
cd ../

tar zxvf PDO_MYSQL-1.0.2.tgz
cd PDO_MYSQL-1.0.2/
/usr/local/webserver/php/bin/phpize
./configure --with-php-config=/usr/local/webserver/php/bin/php-config --with-pdo-mysql=/usr/local/webserver/mysql
make
make install
cd ../

tar zxvf ImageMagick.tar.gz
cd ImageMagick-6.5.1-2/
./configure
make
make install
cd ../

tar zxvf imagick-2.2.2.tgz
cd imagick-2.2.2/
/usr/local/webserver/php/bin/phpize
./configure --with-php-config=/usr/local/webserver/php/bin/php-config
make
make install
cd ../

6、修改php.ini文件
查找/usr/local/webserver/php/etc/php.ini中的extension_dir = "./"
修改为extension_dir = "/usr/local/webserver/php/lib/php/extensions/no-debug-non-zts-20060613/"
并在此行后增加以下几行,然后保存:
extension = "memcache.so"
extension = "pdo_mysql.so"
extension = "imagick.so"

再查找output_buffering = Off
修改为output_buffering = On

也可执行以下shell命令,自动完成对php.ini文件的修改:
sed -i 's#extension_dir = "./"#extension_dir = "/usr/local/webserver/php/lib/php/extensions/no-debug-non-zts-20060613/"/nextension = "memcache.so"/nextension

= "pdo_mysql.so"/nextension = "imagick.so"/n#' /usr/local/webserver/php/etc/php.ini
sed -i 's#output_buffering = Off#output_buffering = On#' /usr/local/webserver/php/etc/php.ini

7、配置eAccelerator加速PHP:
mkdir -p /usr/local/webserver/eaccelerator_cache  //创建存储缓存文件的目录
vi /usr/local/webserver/php/etc/php.ini

按shift+g键跳到配置文件的最末尾,加上以下配置信息:
[eaccelerator]
zend_extension="/usr/local/webserver/php/lib/php/extensions/no-debug-non-zts-20060613/eaccelerator.so"
eaccelerator.shm_size="64"
eaccelerator.cache_dir="/usr/local/webserver/eaccelerator_cache"
eaccelerator.enable="1"
eaccelerator.optimizer="1"
eaccelerator.check_mtime="1"
eaccelerator.debug="0"
eaccelerator.filter=""
eaccelerator.shm_max="0"
eaccelerator.shm_ttl="3600"
eaccelerator.shm_prune_period="3600"
eaccelerator.shm_only="0"
eaccelerator.compress="1"
eaccelerator.compress_level="9"

8、创建www用户和组,以及供blog主机使用的目录:
/usr/sbin/groupadd www
/usr/sbin/useradd -g www www
mkdir -p /var/www/blog
chmod +w /var/www/blog
chown -R www:www /var/www/blog

9、创建php-fpm配置文件(php-fpm是为PHP打的一个FastCGI管理补丁,可以平滑变更php.ini配置而无需重启php-cgi):
在/usr/local/webserver/php/etc/目录中创建php-fpm.conf文件:
rm -f /usr/local/webserver/php/etc/php-fpm.conf
vi /usr/local/webserver/php/etc/php-fpm.conf
输入以下内容(如果您安装 Nginx + PHP 用于程序调试,请将以下的<value name="display_errors">0</value>改为<value name="display_errors">1</value>,以便显示PHP错误信息,否则,Nginx 会报状态为500的空白错误页)

<?xml version="1.0" ?>
<configuration>

  All relative paths in this config are relative to php's install prefix

  <section name="global_options">

    Pid file
    <value name="pid_file">/usr/local/webserver/php/logs/php-fpm.pid</value>

    Error log file
    <value name="error_log">/usr/local/webserver/php/logs/php-fpm.log</value>

    Log level
    <value name="log_level">notice</value>

    When this amount of php processes exited with SIGSEGV or SIGBUS ...
    <value name="emergency_restart_threshold">10</value>

    ... in a less than this interval of time, a graceful restart will be initiated.
    Useful to work around accidental curruptions in accelerator's shared memory.
    <value name="emergency_restart_interval">1m</value>

    Time limit on waiting child's reaction on signals from master
    <value name="process_control_timeout">5s</value>

    Set to 'no' to debug fpm
    <value name="daemonize">yes</value>

  </section>

  <workers>

    <section name="pool">
      Name of pool. Used in logs and stats.
      <value name="name">default</value>

      Address to accept fastcgi requests on.
      Valid syntax is 'ip.ad.re.ss:port' or just 'port' or '/path/to/unix/socket'
      <value name="listen_address">127.0.0.1:9000</value>

      <value name="listen_options">

        Set listen(2) backlog
        <value name="backlog">-1</value>

        Set permissions for unix socket, if one used.
        In Linux read/write permissions must be set in order to allow connections from web server.
        Many BSD-derrived systems allow connections regardless of permissions.
        <value name="owner"></value>
        <value name="group"></value>
        <value name="mode">0666</value>
      </value>

      Additional php.ini defines, specific to this pool of workers.
      <value name="php_defines">
        <value name="sendmail_path">/usr/sbin/sendmail -t -i</value>
        <value name="display_errors">1</value>
      </value>

      Unix user of processes
        <value name="user">www</value>

      Unix group of processes
        <value name="group">www</value>

      Process manager settings
      <value name="pm">

        Sets style of controling worker process count.
        Valid values are 'static' and 'apache-like'
        <value name="style">static</value>

        Sets the limit on the number of simultaneous requests that will be served.
        Equivalent to Apache MaxClients directive.
        Equivalent to PHP_FCGI_CHILDREN environment in original php.fcgi
        Used with any pm_style.
        <value name="max_children">128</value>

        Settings group for 'apache-like' pm style
        <value name="apache_like">

          Sets the number of server processes created on startup.
          Used only when 'apache-like' pm_style is selected
          <value name="StartServers">20</value>

          Sets the desired minimum number of idle server processes.
          Used only when 'apache-like' pm_style is selected
          <value name="MinSpareServers">5</value>

          Sets the desired maximum number of idle server processes.
          Used only when 'apache-like' pm_style is selected
          <value name="MaxSpareServers">35</value>

        </value>

      </value>

      The timeout (in seconds) for serving a single request after which the worker process will be terminated
      Should be used when 'max_execution_time' ini option does not stop script execution for some reason
      '0s' means 'off'
      <value name="request_terminate_timeout">0s</value>

      The timeout (in seconds) for serving of single request after which a php backtrace will be dumped to slow.log file
      '0s' means 'off'
      <value name="request_slowlog_timeout">0s</value>

      The log file for slow requests
      <value name="slowlog">logs/slow.log</value>

      Set open file desc rlimit
      <value name="rlimit_files">65535</value>

      Set max core size rlimit
      <value name="rlimit_core">0</value>

      Chroot to this directory at the start, absolute path
      <value name="chroot"></value>

      Chdir to this directory at the start, absolute path
      <value name="chdir"></value>

      Redirect workers' stdout and stderr into main error log.
      If not set, they will be redirected to /dev/null, according to FastCGI specs
      <value name="catch_workers_output">yes</value>

      How much requests each process should execute before respawn.
      Useful to work around memory leaks in 3rd party libraries.
      For endless request processing please specify 0
      Equivalent to PHP_FCGI_MAX_REQUESTS
      <value name="max_requests">102400</value>

      Comma separated list of ipv4 addresses of FastCGI clients that allowed to connect.
      Equivalent to FCGI_WEB_SERVER_ADDRS environment in original php.fcgi (5.2.2+)
      Makes sense only with AF_INET listening socket.
      <value name="allowed_clients">127.0.0.1</value>

      Pass environment variables like LD_LIBRARY_PATH
      All $VARIABLEs are taken from current environment
      <value name="environment">
        <value name="HOSTNAME">$HOSTNAME</value>
        <value name="PATH">/usr/local/bin:/usr/bin:/bin</value>
        <value name="TMP">/tmp</value>
        <value name="TMPDIR">/tmp</value>
        <value name="TEMP">/tmp</value>
        <value name="OSTYPE">$OSTYPE</value>
        <value name="MACHTYPE">$MACHTYPE</value>
        <value name="MALLOC_CHECK_">2</value>
      </value>

    </section>

  </workers>

</configuration>

10、启动php-cgi进程,监听127.0.0.1的9000端口,进程数为200(如果服务器内存小于3GB,可以只开启64个进程),用户为www:
ulimit -SHn 65535 
/usr/local/webserver/php/sbin/php-fpm start
另:ulimit命令是用于shell启动进程所占用的资源。其所有的设置都是针对shell进程的,每个进程是独立的。
ulimit -n 1024 表示每个启动的进程可以同时打开的文件描述符的最大值是1024。
-H 设置硬件资源限制。
-S 设置软件资源限制。
注:/usr/local/webserver/php/sbin/php-fpm还有其他参数,包括:start|stop|quit|restart|reload|logrotate,修改php.ini后不重启php-cgi,重新加载配置文件使用reload



三、安装Nginx 0.8.15
1、安装Nginx所需的pcre库:
tar zxvf pcre-7.9.tar.gz
cd pcre-7.9/
./configure
make && make install
cd ../


2、安装Nginx
tar zxvf nginx-0.8.15.tar.gz
cd nginx-0.8.15/
./configure --user=www --group=www --prefix=/usr/local/webserver/nginx --with-http_stub_status_module --with-http_ssl_module
make && make install
cd ../

3、创建Nginx日志目录
mkdir -p /data1/logs
chmod +w /data1/logs
chown -R www:www /data1/logs

4、创建Nginx配置文件
(1) 在/usr/local/webserver/nginx/conf/目录中创建nginx.conf文件:
rm -f /usr/local/webserver/nginx/conf/nginx.conf
vi /usr/local/webserver/nginx/conf/nginx.conf

输入以下内容:

#使用小号
user  www www;

#开启进程数
worker_processes 8;      #worker_processes 指明了nginx要开启的进程数,据实践表明,nginx的这个参数在一般情况下开4个或8个就可以了,再往上开的话优化不太大。

#制定进程到cpu(四cpu:0001 0010 0100 1000)
#worker_cpu_affinity 0001 0010 0100 1000 0001 0010 0100 1000;

error_log  /data1/logs/nginx_error.log  crit;

#进程号保存文件
pid    /usr/local/webserver/nginx/nginx.pid;

#Specifies the value for maximum file descriptors that can be opened by this process. #每个进程最大打开文件数
worker_rlimit_nofile 65535;   #worker_rlimit_nofile 配置要和系统的单进程打开文件数一致,linux 2.6内核下开启文件打开数为65535,worker_rlimit_nofile就相应应该填写65535

events
{
  #使用epoll(linux2.6的高性能方式)
  use epoll;
  #每个进程最大连接数(最大连接=连接数x进程数)
  worker_connections 65535;
}

http
{
  #文件扩展名与文件类型映射表
  include       mime.types;
  #默认文件类型
  default_type  application/octet-stream;

  #charset  gb2312;
     
  server_names_hash_bucket_size 128;
  client_header_buffer_size 32k;
  large_client_header_buffers 4 32k;
  client_max_body_size 8m;
     
  sendfile on;
  tcp_nopush     on;
  #长链接超时时间
  keepalive_timeout 60;

  tcp_nodelay on;

  fastcgi_connect_timeout 300;
  fastcgi_send_timeout 300;
  fastcgi_read_timeout 300;
  fastcgi_buffer_size 64k;
  fastcgi_buffers 4 64k;
  fastcgi_busy_buffers_size 128k;
  fastcgi_temp_file_write_size 128k;
 
  gzip on;  #打开gzip压缩
  gzip_min_length  1k;  #最小压缩文件大小
  gzip_buffers     4 16k;   #压缩缓冲区
  gzip_http_version 1.0;  #压缩版本
  gzip_comp_level 2;  #压缩比率
  gzip_types       text/plain application/x-javascript text/css application/xml;  #压缩类型
  gzip_vary on;  #vary header支持

  #limit_zone  crawler  $binary_remote_addr  10m;

  server
  {
    listen       80;
    server_name  blog.s135.com;
    index index.html index.htm index.php;
    root  /data0/htdocs/blog;

    #limit_conn   crawler  20;   
                           
    location ~ .*/.(php|php5)?$
    {     
      #fastcgi_pass  unix:/tmp/php-cgi.sock;
      fastcgi_pass  127.0.0.1:9000;
      fastcgi_index index.php;
      include fcgi.conf;
    }
   
    location ~ .*/.(gif|jpg|jpeg|png|bmp|swf)$
    {
      expires      30d;
    }

    location ~ .*/.(js|css)?$
    {
      expires      1h;
    }   
    #日志文件格式
    log_format  access  '$remote_addr - $remote_user [$time_local] "$request" '
              '$status $body_bytes_sent "$http_referer" '
              '"$http_user_agent" $http_x_forwarded_for';
    #日志文件
    access_log  /data1/logs/access.log  access;
      }
}
(2) 在/usr/local/webserver/nginx/conf/目录中创建fcgi.conf文件:
vi /usr/local/webserver/nginx/conf/fcgi.conf

输入以下内容:
fastcgi_param  GATEWAY_INTERFACE  CGI/1.1;
fastcgi_param  SERVER_SOFTWARE    nginx;

fastcgi_param  QUERY_STRING       $query_string;
fastcgi_param  REQUEST_METHOD     $request_method;
fastcgi_param  CONTENT_TYPE       $content_type;
fastcgi_param  CONTENT_LENGTH     $content_length;

fastcgi_param  SCRIPT_FILENAME    $document_root$fastcgi_script_name;
fastcgi_param  SCRIPT_NAME        $fastcgi_script_name;
fastcgi_param  REQUEST_URI        $request_uri;
fastcgi_param  DOCUMENT_URI       $document_uri;
fastcgi_param  DOCUMENT_ROOT      $document_root;
fastcgi_param  SERVER_PROTOCOL    $server_protocol;

fastcgi_param  REMOTE_ADDR        $remote_addr;
fastcgi_param  REMOTE_PORT        $remote_port;
fastcgi_param  SERVER_ADDR        $server_addr;
fastcgi_param  SERVER_PORT        $server_port;
fastcgi_param  SERVER_NAME        $server_name;

# PHP only, required if PHP was built with --enable-force-cgi-redirect
fastcgi_param  REDIRECT_STATUS    200;

5、启动Nginx
ulimit -SHn 65535
/usr/local/webserver/nginx/sbin/nginx


四、配置开机自动启动Nginx + PHP
vi /etc/rc.local

在末尾增加以下内容:
ulimit -SHn 65535
/usr/local/webserver/php/sbin/php-fpm start
/usr/local/webserver/nginx/sbin/nginx

六、在不停止Nginx服务的情况下平滑变更Nginx配置
1、修改/usr/local/webserver/nginx/conf/nginx.conf配置文件后,请执行以下命令检查配置文件是否正确:
/usr/local/webserver/nginx/sbin/nginx -t

如果屏幕显示以下两行信息,说明配置文件正确:
the configuration file /usr/local/webserver/nginx/conf/nginx.conf syntax is ok
the configuration file /usr/local/webserver/nginx/conf/nginx.conf was tested successfully

2、这时,输入以下命令查看Nginx主进程号:
ps -ef | grep "nginx: master process" | grep -v "grep" | awk -F ' ' '{print $2}'

屏幕显示的即为Nginx主进程号,例如:
4913
这时,执行以下命令即可使修改过的Nginx配置文件生效:
kill -HUP 4913

或者无需这么麻烦,找到Nginx的Pid文件:
kill -HUP `cat /usr/local/webserver/nginx/nginx.pid`


七、编写每天定时切割Nginx日志的脚本
1、创建脚本/usr/local/webserver/nginx/sbin/cut_nginx_log.sh
vi /usr/local/webserver/nginx/sbin/cut_nginx_log.sh

输入以下内容:

#!/bin/bash
# This script run at 00:00

# The Nginx logs path
logs_path="/usr/local/webserver/nginx/logs/"

mkdir -p ${logs_path}$(date -d "yesterday" +"%Y")/$(date -d "yesterday" +"%m")/
mv ${logs_path}access.log ${logs_path}$(date -d "yesterday" +"%Y")/$(date -d "yesterday" +"%m")/access_$(date -d "yesterday" +"%Y%m%d").log
kill -USR1 `cat /usr/local/webserver/nginx/nginx.pid`


2、设置crontab,每天凌晨00:00切割nginx访问日志
crontab -e

输入以下内容:
00 00 * * * /bin/bash  /usr/local/webserver/nginx/sbin/cut_nginx_log.sh
能有这篇文章主要还是得益于张宴大哥的博客,在此代表
学习以及从事web开发的人员再次的感谢张宴大哥的贡献精神。