1. 编写2个APP应用

在 Streamlit 中一个 .py 文件就是一个 APP 应用，下面我们在 Nginx 上部署 2 个 Streamlit APP：

:::tips 📑 hello.py :::

  1. import streamlit as st
  2. import numpy as np
  3. import time
  5. progress_bar = st.progress(0)
  6. status_text = st.empty()
  7. chart = st.line_chart(np.random.randn(10, 2))
  9. for i in range(100):
  10.     # Update progress bar.
  11.     progress_bar.progress(i + 1)
  13.     new_rows = np.random.randn(10, 2)
  15.     # Update status text.
  16.     status_text.text(
  17.         'The latest random number is: %s' % new_rows[-1, 1])
  19.     # Append data to the chart.
  20.     chart.add_rows(new_rows)
  22.     # Pretend we're doing some computation that takes time.
  23.     time.sleep(0.1)
  25. status_text.text('Done!')
  26. st.balloons()

:::tips 📑 hello2.py :::

  1. import streamlit as st
  2. import numpy as np
  3. import pandas as pd
  5. if st.checkbox('Show dataframe'):
  6.     chart_data = pd.DataFrame(
  7.        np.random.randn(20, 3),
  8.        columns=['a', 'b', 'c'])
  10.     chart_data

2. nohup启动APPs

Streamlit 需要在单独启动每一个 APP 应用：

  1. $ nohup streamlit run --server.port 8051 hello.py > /dev/null 2>&1 &
  2. $ nohup streamlit run --server.port 8052 hello2.py > /dev/null 2>&1 &

3. Nginx设置反向代码

  1. server {
  2.         listen       8081;
  3.         server_name  localhost;
  5.         location /hello {
  6.             rewrite /hello/(.*) /$1  break;
  7.             proxy_pass http://localhost:8501;
  8.             proxy_http_version 1.1;
  9.             proxy_buffering    off;
  10.             proxy_set_header Upgrade $http_upgrade;
  11.             proxy_set_header Connection "upgrade";
  12.             proxy_read_timeout 86400;
  13.         }
  15.         location /hello2 {
  16.             rewrite /hello2/(.*) /$1  break;
  17.             proxy_pass http://localhost:8502;
  18.             proxy_http_version 1.1;
  19.             proxy_buffering    off;
  20.             proxy_set_header Upgrade $http_upgrade;
  21.             proxy_set_header Connection "upgrade";
  22.             proxy_read_timeout 86400;
  23.         }

注意：由于 Streamlit 采用的是 Tornado 框架，所以无法像 Django、Flask 一样结合 uWSGI 进行部署。

4. 访问

这样你就可以访问 http://localhost:8081/hello/ 和 http://localhost:8081/hello2/ 来访问 2 个应用了，当来你使用 http://localhost:8501 和 http://localhost:8502 也是可以访问得到应用的。

5. 参考文档