Nginx 学习笔记一

Nginx 是一个高性能的 HTTP 和 反向代理 服务器
安装nginx

Nginx依赖

安装 pcre，支持 rewrite

yum install pcre*

安装 openssl，需要 ssl 的支持

yum install openssl*

安装

# ./configure --prefix=/usr/local/nginx \
--with-http_ssl_module   \
--with-http_stub_status_module
--with-pcre
#–with-http_stub_status_module：支持 nginx 状态查询
#–with-http_ssl_module：支持 https
#–with-pcre：为了支持 rewrite 重写功能，必须制定 pcre

make && make install

启动 关闭 nginx
启动 /usr/local/nginx/sbin/nginx
关闭 /usr/local/nginx/sbin/nginx -s stop

或者
添加启动脚本

#!/bin/sh
#
# nginx - this script starts and stops the nginx daemin
#
# chkconfig: - 85 15
# description: Nginx is an HTTP(S) server, HTTP(S) reverse \
# proxy and IMAP/POP3 proxy server
# processname: nginx
# config: /usr/local/nginx/conf/nginx.conf
# pidfile: /usr/local/nginx/logs/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"

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
}

restart() {
configtest || return $?
stop
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

nginx添加清缓存模块安装

tar xf ngx_cache_purge-2.3.tar.gz -C /usr/local/ngx_cache_purge
进入nginx源文件 重新配置
# ./configure --prefix=/usr/local/nginx \
--with-http_ssl_module   \
--with-http_stub_status_module
--with-pcre
--add-module=/usr/local/ngx_cache_purge
make 不需要make install
复制obj目录下面的nginx二进制文件到/usr/local/nginx/sbin下
cp obj/nginx /usr/local/nginx/sbin

查看加载的模块 nginx -V

内核参数优化

vi sysctl.conf 增加以下配置
net.ipv4.netfilter.ip_conntrack_tcp_timeout_established = 1800
net.ipv4.ip_conntrack_max = 16777216 ＃ 如果使用默认参数,容易出现网络丢包
net.ipv4.netfilter.ip_conntrack_max = 16777216＃ 如果使用默认参数,容易出现网络丢包
net.ipv4.tcp_max_syn_backlog = 65536
net.core.netdev_max_backlog = 32768
net.core.somaxconn = 32768
net.core.wmem_default = 8388608
net.core.rmem_default = 8388608
net.core.rmem_max = 16777216
net.core.wmem_max = 16777216
net.ipv4.tcp_timestamps = 0
net.ipv4.tcp_synack_retries = 2
net.ipv4.tcp_syn_retries =
net.ipv4.tcp_tw_recycle = 1
net.ipv4.tcp_tw_reuse = 1
net.ipv4.tcp_mem = 94500000 915000000 927000000
net.ipv4.tcp_max_orphans = 3276800
net.ipv4.ip_local_port_range = 1024 65535
配置生效
# sysctl –p

简单站点配置

server {
listen       80;
# 在本机所有 ip 上监听 80
server_name  www.jwh5566.com;#域名
location / {
index  index.html index.htm;# 索引文件
}
error_page   500 502 503 504  /50x.html;
#定义错误页面,如果是 500 错误,则把站点根目录下的 50x.html 返回给用户
location = /50x.html {
root   /www/html/www.jwh5566.com;站点根目录
}

测试
mkdir –p /www/html/www.jwh5566.com

echo “www.jwh5566.com” > /www/html/www.jwh5566.com/index.html

打开浏览器访问http：//www.jwh5566.com即可！

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