CentOS6.5安装nginx及负载均衡配置

[root@localhost download]# wget http://nchc.dl.sourceforge.net/project/pcre/pcre/8.37/pcre-8.37.tar.gz

[root@localhost download]# tar zxvf pcre-8.36.tar.gz

2、下载zlib库

[root@localhost pcre-8.36]# cd /tmp/download/
[root@localhost download]# wget http://ncu.dl.sourceforge.net/project/libpng/zlib/1.2.8/zlib-1.2.8.tar.gz

[root@localhost download]# tar -zxvf zlib-1.2.8.tar.gz cd zlib-1.2.8

4、下载SSL

[root@localhost zlib-1.2.8]# cd ..
[root@localhost download]# wget http://www.openssl.org/source/openssl-1.0.1p.tar.gz

[root@localhost download]# cd openssl-1.0.1c

[root@localhost openssl-1.0.1c]# tar -zxvf openssl-1.0.1c.tar.gz

5、下载nginx

[root@localhost download]# wget http://nginx.org/download/nginx-1.2.8.tar.gz

[root@localhost download]# tar -zxvf nginx-1.2.8.tar.gz

6、安装

[root@localhost download]mv pcre-8.36 /usr/local/

[root@localhost download]mv zlib-1.2.8 /usr/local/

[root@localhost download]mv openssl-1.0.1c /usr/local/

[root@localhost download]mv nginx-1.2.8 /usr/local/

[root@localhost download]cd /usr/local/

[root@localhost local]# cd pcre-8.36

[root@localhost pcre-8.36]# ./configure&&make&&make install

[root@localhost pcre-8.36] cd ../zlib-1.2.8

[root@localhost zlib-1.2.8]# ./configure && make && make install

7、启动nginx

[root@localhost nginx]# /usr/local/nginx/sbin/nginx -c /usr/local/nginx/conf/nginx.conf

8、测试

在确保可以连接到服务器的电脑上，浏览器输入装了nginx的机器的ip地址，会看到Welcome to nginx!的提示说明安装配配置成功了。

9、设置开机自动启动（shell脚本处理）

[root@localhost logs]# vi /etc/init.d/nginx

添加以下shell脚本。

#!/bin/bash
# nginx Startup script for the Nginx HTTP Server
# it is v.0.0.2 version.
# chkconfig: - 85 15
# description: Nginx is a high-performance web and proxy server.
#              It has a lot of features, but it's not for everyone.
# processname: nginx
# pidfile: /var/run/nginx.pid
# config: /usr/local/nginx/conf/nginx.conf
nginxd=/usr/local/nginx/sbin/nginx
nginx_config=/usr/local/nginx/conf/nginx.conf
nginx_pid=/var/run/nginx.pid
RETVAL=0
prog="nginx"
# Source function library.
. /etc/rc.d/init.d/functions
# Source networking configuration.
. /etc/sysconfig/network
# Check that networking is up.
[ ${NETWORKING} = "no" ] && exit 0
[ -x $nginxd ] || exit 0
# Start nginx daemons functions.
start() {
if [ -e $nginx_pid ];then
echo "nginx already running...."
exit 1
fi
echo -n $"Starting $prog: "
daemon $nginxd -c ${nginx_config}
RETVAL=$?
echo
[ $RETVAL = 0 ] && touch /var/lock/subsys/nginx
return $RETVAL
}
# Stop nginx daemons functions.
stop() {
echo -n $"Stopping $prog: "
killproc $nginxd
RETVAL=$?
echo
[ $RETVAL = 0 ] && rm -f /var/lock/subsys/nginx /var/run/nginx.pid
}
# reload nginx service functions.
reload() {
echo -n $"Reloading $prog: "
#kill -HUP `cat ${nginx_pid}`
killproc $nginxd -HUP
RETVAL=$?
echo
}
# See how we were called.
case "$1" in
start)
start
;;
stop)
stop
;;
reload)
reload
;;
restart)
stop
start
;;
status)
status $prog
RETVAL=$?
;;
*)
echo $"Usage: $prog {start|stop|restart|reload|status|help}"
exit 1
esac
exit $RETVAL

保存后，设置权限让所有人可以操作。

[root@localhost ~]# chmod a+x /etc/init.d/nginx

[root@localhost logs]#  /etc/init.d/nginx status
nginx (pid 2417 2416) is running...
[root@localhost logs]#  /etc/init.d/nginx stop
Stopping nginx: [  OK  ]
[root@localhost logs]#  /etc/init.d/nginx start
Starting nginx: [  OK  ]
[root@localhost logs]#  /etc/init.d/nginx status
nginx (pid 2454 2452) is running...

[root@localhost ~]# vi /etc/rc.local

添加：

/etc/init.d/nginx start

重启电脑就会生效。

注意：脚本里面关于启动目录的，如果你的安装地址不一样，要进行修改。

负载均衡配置：

现有两部服务器：

192.168.137.197     （按照以上操作安装有 nginx， 作为转发机，虚拟机）

192.168.137.33     （无安装nginx，运行有测试用的web工程，虚拟机）

10.10.33.59    （无安装nginx，运行有测试用的web工程，本地电脑地址）

，运行有测试用的web工程

127.0.0.1 web_app

[root@a conf]# vi /usr/local/nginx/conf/nginx.conf

配置如下展示：

worker_processes 8;
pid /usr/local/nginx/nginx.pid;
worker_rlimit_nofile 102400;
events
{
use epoll;
worker_connections 102400;
}
http
{
include       mime.types;
default_type  application/octet-stream;
fastcgi_intercept_errors on;
charset  utf-8;
server_names_hash_bucket_size 128;
client_header_buffer_size 4k;
large_client_header_buffers 4 32k;
client_max_body_size 300m;
sendfile on;
tcp_nopush     on;

keepalive_timeout 60;

tcp_nodelay on;
client_body_buffer_size  512k;

proxy_connect_timeout    5;
proxy_read_timeout       60;
proxy_send_timeout       5;
proxy_buffer_size        16k;
proxy_buffers            4 64k;
proxy_busy_buffers_size 128k;
proxy_temp_file_write_size 128k;

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;

###2012-12-19 change nginx logs
log_format  main  '$http_x_forwarded_for - $remote_user [$time_local] "$request" '
'$status $body_bytes_sent "$http_referer" '
'"$http_user_agent"  $request_time $remote_addr';

upstream web_app {
server 192.168.137.197:8080 weight=1 max_fails=2 fail_timeout=30s;
server 192.168.137.33:8080 weight=1 max_fails=2 fail_timeout=30s;
server 10.10.33.59:8080 weight=1 max_fails=2 fail_timeout=30s;
}

####chinaapp.sinaapp.com
server {
listen 80;
server_name  chinaapp.sinaapp.com;
index index.jsp index.html index.htm;
#发布目录/data/www
root  /data/www;

location /
{
proxy_next_upstream http_502 http_504 error timeout invalid_header;
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_pass http://web_app;
expires      3d;
}
}
}

设置host：

[root@a conf]# vi /etc/hosts

添加hosts：

127.0.0.1 web_app

启动三部服务器的web应用：

在192.168.137.197执行指令：

[root@a PROGRAM]# curl "http://web_app/index.jsp"

测试结果如下：

常见问题及解决办法：