CentOS6.4系统配置Nginx服务器反向代理和缓存

1. 最小化安装 centos 6.2

2. 编译环境前提
# yum -y install gcc gcc-c++ make openssl-devel pcre-devel
# groupadd -g 80 www
# useradd -u 80 -g www -M -s /sbin/nologin www

3. Nginx服务端安装
# wget http://nginx.org/download/nginx-1.2.2.tar.gz
# wget http://labs.frickle.com/files/ngx_cache_purge-1.6.tar.gz
# tar zxvf nginx-1.2.2.tar.gz
# tar zxvf ngx_cache_purge-1.6.tar.gz
# cd nginx-1.2.2
# ./configure --add-module=../ngx_cache_purge-1.6 --prefix=/usr/local/nginx --user=www --group=www --with-http_ssl_module --with-http_gzip_static_module --with-http_stub_status_module --with-http_sub_module && make && make install

4. 开机自启动脚本
# vi /etc/init.d/nginx
#!/bin/sh
#
# nginx - this script starts and stops the nginx daemon
#
# chkconfig:   - 85 15
# description: Nginx is an HTTP(S) server, HTTP(S) reverse \
#               proxy and IMAP/POP3 proxy server
# processname: nginx
# config:      /etc/nginx/nginx.conf
# config:      /etc/sysconfig/nginx
# pidfile:     /var/run/nginx.pid
# Source function library.
. /etc/rc.d/init.d/functions
# Source networking configuration.
. /etc/sysconfig/network
# Check that networking is up.
[ "$NETWORKING" = "no" ] && exit 0
nginx="/usr/local/nginx/sbin/nginx"
prog=$(basename $nginx)
NGINX_CONF_FILE="/usr/local/nginx/conf/nginx.conf"
[ -f /etc/sysconfig/nginx ] && . /etc/sysconfig/nginx
lockfile=/var/lock/subsys/nginx
start() {
    [ -x $nginx ] || exit 5
    [ -f $NGINX_CONF_FILE ] || exit 6
    echo -n $"Starting $prog: "
    daemon $nginx -c $NGINX_CONF_FILE
    retval=$?
    echo
    [ $retval -eq 0 ] && touch $lockfile
    return $retval
}
stop() {
    echo -n $"Stopping $prog: "
    killproc $prog -QUIT
    retval=$?
    echo
    [ $retval -eq 0 ] && rm -f $lockfile
    return $retval
killall -9 nginx
}
restart() {
    configtest || return $?
    stop
    sleep 1
    start
}
reload() {
    configtest || return $?
    echo -n $"Reloading $prog: "
    killproc $nginx -HUP
RETVAL=$?
    echo
}
force_reload() {
    restart
}
configtest() {
$nginx -t -c $NGINX_CONF_FILE
}
rh_status() {
    status $prog
}
rh_status_q() {
    rh_status >/dev/null 2>&1
}
case "$1" in
    start)
        rh_status_q && exit 0
    $1
        ;;
    stop)
        rh_status_q || exit 0
        $1
        ;;
    restart|configtest)
        $1
        ;;
    reload)
        rh_status_q || exit 7
        $1
        ;;
    force-reload)
        force_reload
        ;;
    status)
        rh_status
        ;;
    condrestart|try-restart)
        rh_status_q || exit 0
;;
    *)
      echo $"Usage: $0 {start|stop|status|restart|condrestart|try-restart|reload|force-reload|configtest}"
        exit 2
esac
# chmod 755 /etc/init.d/nginx
# chkconfig --add nginx
# chkconfig --level 2345 nginx on

配置文件
# vi /usr/local/nginx/conf/nginx.conf
user www www;
worker_processes 8;
error_log logs/error.log crit;
pid logs/nginx.pid;
worker_rlimit_nofile 1024;
events {
    use epoll;
    worker_connections 1024;
}
http {
    include mime.types;
    default_type application/octet-stream;
    server_names_hash_bucket_size 128;
    client_header_buffer_size 32k;
    large_client_header_buffers 4 32k;
    client_max_body_size 300m;
    sendfile on;
    tcp_nopush on;
    tcp_nodelay on;
    keepalive_timeout 60;
    gzip on;
    gzip_min_length 1k;
    gzip_buffers 4 16k;
    gzip_http_version 1.1;
    gzip_comp_level 2;
    gzip_types text/plain application/x-Javascript text/css application/xml;
    gzip_vary on;
#缓存目录设置
    proxy_temp_path /cache/proxy_temp_dir;
    proxy_cache_path /cache/proxy_cache_dir levels=1:2 keys_zOne=cache_one:200m inactive=1d max_size=4g;
#负载均衡
    upstream backend_server {
        server 8.8.4.4:80 weight=1 max_fails=2 fail_timeout=30s;
        server 4.4.4.4:80 weight=1 max_fails=2 fail_timeout=30s;
    }
#状态监控
    server {
        listen 84;
        server_name _;
        location / {
stub_status on;
access_log off;
        }
    }
#空主机头
    server {
        listen 80;
        server_name 8.8.8.8;
        return 404;
    }
#代理域名配置
    server {
        listen 80;
        server_name www.server110.com;
        index index.html index.htm index.php index.asp;
        access_log logs/www.server110.com.log;
#清除缓存配置
        location ~ /purge(/.*) {
allow all;
deny 127.0.0.1;
proxy_cache_purge cache_one $host$1$is_args$args;
        }
#反向代理
        location / {
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-Forwarded-For $remote_addr;
proxy_pass http://8.8.8.8:80;
        }
#缓存类型
        location ~ .*\.(gif|jpg|jpeg|png|bmp|swf|js|css)$ {
proxy_next_upstream http_502 http_504 error timeout invalid_header;
proxy_cache cache_one;
proxy_cache_valid 200 304 24h;
proxy_cache_valid 301 302 1m;
proxy_cache_valid any 1m;
proxy_cache_key $host$uri$is_args$args;
proxy_set_header Host  $host;
proxy_set_header X-Forwarded-For $remote_addr;
proxy_pass http://8.8.8.8:80;
add_header X-Cache HIT-PY;
expires 1d;
        }
    }
}
如果要清理 http://www.server110.com/logo.jpg 这个缓存文件，通过访问http://www.server110.com/purge/logo.jpg就可以清除掉了。