Nginx编译安装

        Nginx官方网站, 从官方网站可以看到Nginx更新速度很快，这也反映了一个事实，目前使用Nginx跑网站的公司或者个人越来越多。

1.下载 Nginx

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cd /usr/local/src/
wget http://nginx.org/download/nginx-1.4.4.tar.gz

2.解压 nginx

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tar zxvf nginx-1.4.4.tar.gz

3.配置编译参数

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cd nginx-1.4.4
./configure \
--prefix=/usr/local/nginx \
--with-http_realip_module \
--with-http_sub_module \
--with-http_gzip_static_module \
--with-http_stub_status_module \
--with-pcre

        编译报错

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./configure: error: the HTTP rewrite module requires the PCRE library.

        解决办法

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yum -y install pcre-devel

        编译报错

        解决办法

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yum -y install gcc

        编译报错

        解决办法

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yum install -y zlib-devel

4.编译、安装 nginx

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make && make install

        因为 nginx 比较小，所以很快就会安装完，而且也不会出什么错误。

5.编写 nginx 启动脚本，并加入系统服务

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vim /etc/init.d/nginx

        添加下内容

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#!/bin/bash
# chkconfig: - 30 21
# description: http service.
# Source Function Library
. /etc/init.d/functions
# Nginx Settings
NGINX_SBIN="/usr/local/nginx/sbin/nginx"
NGINX_CONF="/usr/local/nginx/conf/nginx.conf"
NGINX_PID="/usr/local/nginx/logs/nginx.pid"
RETVAL=0
prog="Nginx"
start() {
        echo -n $"Starting $prog: "
        mkdir -p /dev/shm/nginx_temp
        daemon $NGINX_SBIN -c $NGINX_CONF
        RETVAL=$?
        echo
        return $RETVAL
}
stop() {
        echo -n $"Stopping $prog: "
        killproc -p $NGINX_PID $NGINX_SBIN -TERM
        rm -rf /dev/shm/nginx_temp
        RETVAL=$?
        echo
        return $RETVAL
}
reload(){
        echo -n $"Reloading $prog: "
        killproc -p $NGINX_PID $NGINX_SBIN -HUP
        RETVAL=$?
        echo
        return $RETVAL
}
restart(){
        stop
        start
}
configtest(){
    $NGINX_SBIN -c $NGINX_CONF -t
    return 0
}
case "$1" in
  start)
        start
        ;;
  stop)
        stop
        ;;
  reload)
        reload
        ;;
  restart)
        restart
        ;;
  configtest)
        configtest
        ;;
  *)
        echo $"Usage: $0 {start|stop|reload|restart|configtest}"
        RETVAL=1
esac
exit $RETVAL

        保存后，更改权限：

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chmod 755 /etc/init.d/nginx
chkconfig --add nginx

        如果需要开机启动，执行：

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chkconfig nginx on

6.更改 nginx 配置

        首先把原来的配置文件清空

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> /usr/local/nginx/conf/nginx.conf

        “>”这个符号为重定向的意思，单独用它，可以把一个文本文档快速清空。

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vim /usr/local/nginx/conf/nginx.conf

        添加如下内容：

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user nobody nobody;
worker_processes 2;
error_log /usr/local/nginx/logs/nginx_error.log crit;
pid /usr/local/nginx/logs/nginx.pid;
worker_rlimit_nofile 51200;
events
{
    use epoll;
    worker_connections 6000;
}
http
{
    include mime.types;
    default_type application/octet-stream;
    server_names_hash_bucket_size 3526;
    server_names_hash_max_size 4096;
    log_format combined_realip '$remote_addr $http_x_forwarded_for [$time_local]'
    '$host "$request_uri" $status'
    '"$http_referer" "$http_user_agent"';
    sendfile on;
    tcp_nopush on;
    keepalive_timeout 30;
    client_header_timeout 3m;
    client_body_timeout 3m;
    send_timeout 3m;
    connection_pool_size 256;
    client_header_buffer_size 1k;
    large_client_header_buffers 8 4k;
    request_pool_size 4k;
    output_buffers 4 32k;
    postpone_output 1460;
    client_max_body_size 10m;
    client_body_buffer_size 256k;
    client_body_temp_path /usr/local/nginx/client_body_temp;
    proxy_temp_path /usr/local/nginx/proxy_temp;
    fastcgi_temp_path /usr/local/nginx/fastcgi_temp;
    fastcgi_intercept_errors on;
    tcp_nodelay on;
    gzip on;
    gzip_min_length 1k;
    gzip_buffers 4 8k;
    gzip_comp_level 5;
    gzip_http_version 1.1;
    gzip_types text/plain application/x-javascript text/css text/htm application/xml;
server
{
    listen 80;
    server_name localhost;
    index index.html index.htm index.php;
    root /usr/local/nginx/html;
    location ~ \.php$ {
        include fastcgi_params;
        fastcgi_pass unix:/tmp/php-fcgi.sock;
        fastcgi_index index.php;
        fastcgi_param SCRIPT_FILENAME /usr/local/nginx/html$fastcgi_script_name;
    }
}
}

        保存配置后，先检验一下配置文件是否有错误存在：

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/usr/local/nginx/sbin/nginx -t

        如果显示内容如下，则配置正确，否则需要根据错误提示修改配置文件：

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nginx: the configuration file /usr/local/nginx/conf/nginx.conf syntax is ok
nginx: configuration file /usr/local/nginx/conf/nginx.conf test is successful
```    
## 7.启动 nginx
```bash
service nginx start

        如果不能启动，查看 /usr/local/nginx/logs/error.log 文件，检查 nginx 是否启动

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ps aux |grep nginx

        看是否有进程