1.添加nginx的安装源

vi /etc/yum.repos.d/nginx.repo

2.输入下面内容，并保存退出

[nginx]
name=nginx repo
baseurl=http://nginx.org/packages/mainline/centos/7/$basearch/
gpgcheck=0
enabled=1

这里是RHEL7

[nginx]
name=nginx repo
baseurl=http://nginx.org/packages/mainline/rhel/7/$basearch/
gpgcheck=0
enabled=1

3.安装

yum install nginx

4.启动

[root@freesaber tmp]# systemctl start nginx
[root@freesaber tmp]# systemctl status nginx
● nginx.service - nginx - high performance web server
   Loaded: loaded (/usr/lib/systemd/system/nginx.service; disabled; vendor preset: disabled)
   Active: active (running) since Thu 2019-03-28 16:16:38 CST; 7s ago
     Docs: http://nginx.org/en/docs/
  Process: 6538 ExecStart=/usr/sbin/nginx -c /etc/nginx/nginx.conf (code=exited, status=0/SUCCESS)
 Main PID: 6539 (nginx)
   CGroup: /system.slice/nginx.service
           ├─6539 nginx: master process /usr/sbin/nginx -c /etc/nginx/nginx.conf
           └─6540 nginx: worker process

 

下面安装node

1.安装nvm https://github.com/creationix/nvm

wget -qO- https://raw.githubusercontent.com/creationix/nvm/v0.34.0/install.sh | bash

2.进入nodejs官网，查看当前nodejs的版本

3.使用nvm安装node

nvm install 10.15.3

4.指定node的版本

[root@freesaber ~]# nvm use v10.15.3
Now using node v10.15.3 (npm v6.4.1)
[root@freesaber ~]# nvm alias default v10.15.3
default -> v10.15.3

5.查看版本

[root@freesaber ~]# node -v
v10.15.3
[root@freesaber ~]# npm -v
6.4.1

6.编写一段node.js脚本，并运行

vi app.js

const http = require('http')

http.createServer(function(req,res){
res.writeHead(200,{'Content-Type':'text/plan;charset=utf-8'});
res.end('来自8081端口的node响应')
}).listen(8081);

node app.js

7.在阿里云的安全组中添加端口入规则

8.访问

 

下面是我的两个域名，默认都是访问的服务器的80端口

http://www.freesaber.cn/
http://nodetree.freesaber.cn/

由于没有配置nginx访问这两个域名，都会得到同一个返回页面

下面将我的二级域名nodetree.freesaber.cn反向代理到我的8081端口，新开一个shell远程窗口，不要关闭node

1.nginx的目录结构和配置文件，我们新增的配置放在conf.d目录下

[root@freesaber nginx]# cd /etc/nginx
[root@freesaber nginx]# ll
total 40
drwxr-xr-x 2 root root 4096 Mar 28 16:14 conf.d
-rw-r--r-- 1 root root 1007 Mar 26 22:27 fastcgi_params
-rw-r--r-- 1 root root 2837 Mar 26 22:27 koi-utf
-rw-r--r-- 1 root root 2223 Mar 26 22:27 koi-win
-rw-r--r-- 1 root root 5231 Mar 26 22:27 mime.types
lrwxrwxrwx 1 root root   29 Mar 28 16:14 modules -> ../../usr/lib64/nginx/modules
-rw-r--r-- 1 root root  643 Mar 26 22:25 nginx.conf
-rw-r--r-- 1 root root  636 Mar 26 22:27 scgi_params
-rw-r--r-- 1 root root  664 Mar 26 22:27 uwsgi_params
-rw-r--r-- 1 root root 3610 Mar 26 22:27 win-utf

[root@freesaber nginx]# cat nginx.conf 

user  nginx;
worker_processes  1;

error_log  /var/log/nginx/error.log warn;
pid        /var/run/nginx.pid;


events {
    worker_connections  1024;
}


http {
    include       /etc/nginx/mime.types;
    default_type  application/octet-stream;

    log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
                      '$status $body_bytes_sent "$http_referer" '
                      '"$http_user_agent" "$http_x_forwarded_for"';

    access_log  /var/log/nginx/access.log  main;

    sendfile        on;
    #tcp_nopush     on;

    keepalive_timeout  65;

    #gzip  on;

    include /etc/nginx/conf.d/*.conf;
}

2.复制一份默认的配置文件

[root@freesaber nginx]# cd /etc/nginx/conf.d
[root@freesaber conf.d]# ls
default.conf
[root@freesaber conf.d]# cp default.conf nodetree.conf
[root@freesaber conf.d]# ll
total 8
-rw-r--r-- 1 root root 1093 Mar 26 22:25 default.conf
-rw-r--r-- 1 root root 1093 Mar 28 16:58 nodetree.conf
[root@freesaber conf.d]# 

3.修改内容新增的nodetree.conf，并保存退出

upstream freesaber{
    server 127.0.0.1:8081;
}

server {
    listen 80;
    server_name  nodetree.freesaber.cn;
    location / {
      proxy_set_header X-Real-IP $remote_addr;
      proxy_set_header X-Forward-For $proxy_add_x_forwarded_for;
      proxy_set_header Host $http_host;
      proxy_set_header X-Nginx-Proxy true;

      proxy_pass http://freesaber;
      proxy_redirect off;
    }
}

4.重启nginx，访问二级域名，这时请求被反向代理到了8081端口的node服务，而对外的服务都是nginx的80端口。其实这个时候，可以从阿里云的安全组中删除8081的入规则。因为nginx代理到本地的8081，而8081不会被外部访问。