一，Linux 6,7 下的安装依赖
yum -y install pcre-devel openssl openssl-devel libssl-dev gcc-c++
二，安装 pcre，让 Nginx 支持 Rewrite 功能
0，pcre 地址：https://sourceforge.net/projects/pcre/
1，下载：wget ftp://ftp.csx.cam.ac.uk/pub/software/programming/pcre/pcre-8.44.tar.gz
2，解压：tar zxvf pcre-8.44.tar.gz
3，进入：cd pcre-8.44
4，配置：./configure
5，编译：make
6，安装：make install
7，验证：pcre-config --version，会出现：8.44，表示安装成功！
三，安装 Nginx
1，下载：wget http://nginx.org/download/nginx-1.16.1.tar.gz
2，解压：tar zxvf nginx-1.16.1.tar.gz
3，进入：cd nginx-1.16.1
4，配置：./configure（可以加上：--with-http_stub_status_module --with-http_ssl_module --with-pcre=/usr/local/src/pcre-8.44）
5，编译：make
6，安装：make install
7，验证：/usr/local/nginx/sbin/nginx -t，出现：nginx: ... syntax is ok ... test is successful ，表示安装成功！
四，CentOS 7 安装 Nginx
1，添加 yum 源：rpm -ivh http://nginx.org/packages/centos/7/noarch/RPMS/nginx-release-centos-7-0.el7.ngx.noarch.rpm
2，安装：yum -y install nginx
3，启动：systemctl start nginx
4，开机自启动：systemctl enable nginx
5，重启服务：systemctl restart nginx
6，重新加载配置：systemctl reload nginx
7，配置文件：配置文件：/etc/nginx/nginx.conf
8，默认配置文件：/etc/nginx/conf.d/default.conf
五，配置
1，启动服务：/usr/local/nginx/sbin/nginx
2，关闭服务：/usr/local/nginx/sbin/nginx -s stop
3，重启服务：/usr/local/nginx/sbin/nginx -s reload
4，加入系统服务：vim /etc/rc.local，添加：/usr/local/nginx/sbin/nginx
5，在 /usr/local/nginx/conf 中创建：gzip.conf
gzip on;
gzip_min_length 1k;
gzip_buffers 4 16k;
gzip_types text/plain text/css application/x-javascript;
output_buffers 1 64k;
postpone_output 1460;
6，在 /usr/local/nginx/conf 中创建：proxy.conf
proxy_redirect off;
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
client_max_body_size 10m; #文件上传大小限制
client_body_buffer_size 256k;
proxy_connect_timeout 300;
proxy_send_timeout 300;
proxy_read_timeout 300;
proxy_buffer_size 16k;
proxy_buffers 4 32k;
proxy_busy_buffers_size 64k;
proxy_temp_file_write_size 64k;
六，最精简的 nginx.conf
七，Nginx 负载均衡配置：
upstream test {
server localhost:8080;
server localhost:8081;
}
server {
listen 80;
server_name localhost;
client_max_body_size 1024M;
location / {
proxy_pass http://test;
proxy_set_header Host $host:$server_port;
}
}
