AWS Ubuntu20.04部署Ghost后网站出现404错误无法访问

基础信息 #

• 网站URL：http://www.vincentyuan.us/
• Ghost版本：5.54.0
• 部署方式：Ghost CLI安装
• 使用浏览器：Chrome
• 问题现象：Ghost状态无报错，但网站访问返回404错误，页面底部标注nginx/1.18.0 (Ubuntu)

已完成操作：创建AWS弹性IP，在Route53配置托管区域，在NameCheap域名服务商处修改对应域名服务器，等待DNS传播后问题仍存在。

配置文件信息 #

config.production.json内容：

{
  "url": "https://vincentyuan.us",
  "server": {
    "port": 2368,
    "host": "127.0.0.1"
  },
  "database": {
    "client": "mysql",
    "connection": {
      "host": "my_host",
      "user": "my_user",
      "password": "password",
      "database": "my_database",
      "ssl": "Amazon RDS"
    }
  },
  "mail": {
    "transport": "Direct"
  },
  "logging": {
    "transports": [
      "file",
      "stdout"
    ]
  },
  "process": "systemd",
  "paths": {
    "contentPath": "/var/www/sitename/content"
  }
}

Ghost Doctor检测日志 #

✔ Checking system Node.js version - found v16.20.1
✔ Checking logged in user
✔ Ensuring user is not logged in as ghost user
✔ Checking if logged in user is directory owner
✔ Checking current folder permissions
✔ Checking system compatibility
+ sudo systemctl is-active ghost_vincentyuan-us
Instance is currently running
ℹ Validating config [skipped]
✔ Checking folder permissions
✔ Checking file permissions
✔ Checking content folder ownership
✖ Checking memory availability
✔ Checking binary dependencies
✔ Checking free space
✔ Checking systemd unit file
✔ Checking systemd node version - found v16.20.1
One or more errors occurred.

1) SystemError

Message: You are recommended to have at least 150 MB of memory available for smooth operation. It looks like you have ~111.0390625 MB available.

Debug Information:
    OS: Ubuntu, v20.04.6 LTS
    Node Version: v16.20.1
    Ghost Version: 5.54.0
    Ghost-CLI Version: 1.24.2
    Environment: production
    Command: 'ghost doctor'

Try running ghost doctor to check your system for known issues.

Nginx状态信息 #

ubuntu@ip-172-31-41-64:/var/www/sitename/current$ service nginx status
● nginx.service - A high performance web server and a reverse proxy server
     Loaded: loaded (/lib/systemd/system/nginx.service; enabled; vendor preset: enabled)
     Active: active (running) since Sun 2023-07-09 03:06:19 UTC; 13h ago
       Docs: man:nginx(8)
   Main PID: 545 (nginx)
      Tasks: 2 (limit: 1141)
     Memory: 3.0M
     CGroup: /system.slice/nginx.service
             ├─545 nginx: master process /usr/sbin/nginx -g daemon on; master_process on;
             └─546 nginx: worker process

Jul 09 03:06:19 ip-172-31-41-64 systemd[1]: Starting A high performance web server and a reverse proxy server...
Jul 09 03:06:19 ip-172-31-41-64 systemd[1]: Started A high performance web server and a reverse proxy server.

SSL设置结果 #

执行ghost set up ssl命令返回：

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SSL has already been set up, skipping
ℹ Setting up SSL [skipped]

1. 检查Nginx配置文件 #

Nginx返回404说明请求未正确转发到Ghost服务，检查Ghost生成的Nginx配置（通常在/etc/nginx/sites-available/或/etc/nginx/sites-enabled/下，文件名对应域名）：

• 确认server_name包含www.vincentyuan.us和vincentyuan.us
• 确认反向代理配置指向http://127.0.0.1:2368，无路径错误
• 检查SSL配置是否匹配：Ghost配置中url为https，但访问用http，可能存在跳转或配置不匹配

2. 验证DNS解析 #

执行以下命令确认域名解析到正确的弹性IP：

nslookup www.vincentyuan.us
ping www.vincentyuan.us

若解析结果不是你的AWS弹性IP，说明DNS配置未生效，检查NameCheap的域名服务器设置是否和Route53托管区域的NS记录完全一致。

3. 检查端口连通性 #

在服务器上执行curl http://127.0.0.1:2368，确认Ghost服务能正常返回内容：

• 返回正常：问题出在Nginx转发
• 返回异常：即使ghost doctor显示运行，内存不足也可能导致服务异常

4. 解决内存不足问题 #

Ghost Doctor提示仅约111MB可用内存，这会影响服务运行，可通过以下方式解决：

• 升级服务器配置至至少1GB内存（Ghost官方推荐）
• 关闭不必要的服务释放内存
• 配置swap分区缓解压力：

  sudo fallocate -l 1G /swapfile
  sudo chmod 600 /swapfile
  sudo mkswap /swapfile
  sudo swapon /swapfile
  

5. 重启服务确保配置生效 #

sudo systemctl restart nginx
ghost restart

内容的提问来源于stack exchange，提问作者Vincent Yuan