docker部署flask无法成功（nginx+gunicorn）

Question

flask+nginx+gunicorn+supervisor用docker方式部署，用supervisor启动后，访问http://127.0.0.1 只能看到nginx的欢迎界面，无法看到flask的界面

相关代码如下：

app.py

from flask import Flask
app = Flask(__name__)

@app.route('/')
def hello_world():
    return 'Hello World!'

if __name__ == '__main__':
    app.run(host='0.0.0.0', port=80)

flask.conf

server {
   listen  80;
   server_name 120.0.0.1;

   location  /  {
      proxy_pass   http://127.0.0.1:8001;
   }
  }
  

supervisor.conf

[program:nginx-app]
command = /usr/sbin/nginx -g "daemon off;"
stdout_logfile = /var/log/supervisor/nginx_stdout.log
stdout_logfile_maxbytes = 10MB
stderr_logfile = /var/log/supervisor/nginx_error.log
stderr_logfile_maxbytes = 10MB

[program:app-gunicorn]
command = /usr/local/bin/gunicorn -w 4 -b 127.0.0.1:8001 app:app
directory = /app
stdout_logfile = /var/log/supervisor/gunicorn_out.log
stdout_logfile_maxbytes = 10MB
stderr_logfile = /var/log/supervisor/gunicorn_error.log
stderr_logfile_maxbytes = 10MB

gunicorn日志：

[2018-12-12 03:29:48 +0000] [8824] [INFO] Starting gunicorn 19.9.0
[2018-12-12 03:29:48 +0000] [8824] [INFO] Listening at: http://127.0.0.1:8001 (8824)
[2018-12-12 03:29:48 +0000] [8824] [INFO] Using worker: sync
[2018-12-12 03:29:48 +0000] [8829] [INFO] Booting worker with pid: 8829
[2018-12-12 03:29:49 +0000] [8830] [INFO] Booting worker with pid: 8830
[2018-12-12 03:29:49 +0000] [8831] [INFO] Booting worker with pid: 8831
[2018-12-12 03:29:49 +0000] [8834] [INFO] Booting worker with pid: 8834

启动supervisor后，只能看到nginx欢迎界面，求解~

Answer 1

在别处得到答案了，原因是没有删除/etc/nginx/sites-enabled/default这个默认配置文件，导致80端口监听重复。

Answer 2

没有用过gunicorn。但印象里nginx配置中，和flask监听端口对应的是在location里声明而非listen，或许可以试着对换一下端口看看