【发布时间】：2020-10-10 09:18:47
【问题描述】：
我正在尝试将 python dash 应用程序部署到我的 apache 服务器。我跟踪了我能找到的有关此配置的少量信息（officials docs；this troubleshooting thread was a bit better）。当我访问该网站时，页面返回一个500 Internal Server Error，在服务器错误日志中描述为"Dash object not callable"。这些是配置文件：
>> cat /var/www/html/wsgi/dashGAF.wsgi
#!/usr/bin/python
import sys
sys.path.insert(0,"/home/ubuntu/dashboards/")
from dashGAF import app as application
>> cat /etc/apache2/sites-available/dash.conf
WSGIDaemonProcess dashGAF user=ubuntu group=ubuntu home=/home/ubuntu threads=5
WSGIScriptAlias /dashGAF /var/www/html/wsgi/dashGAF.wsgi
<Directory /home/ubuntu/dashboards>
WSGIProcessGroup dashGAF
WSGIApplicationGroup %{GLOBAL}
WSGIScriptReloading On
Require all granted
</Directory>
>> cat dashGAF.py
# -*- coding: utf-8 -*-
import dash
import dash_core_components as dcc
import dash_html_components as html
external_stylesheets = ['https://codepen.io/chriddyp/pen/bWLwgP.css']
app = dash.Dash(__name__, external_stylesheets=external_stylesheets, routes_pathname_prefix='/dashGAF/')
server = app.server
app.layout = html.Div(children=[
html.H1(children='Hello Dash'),
html.Div(children='''
Dash: A web application framework for Python.
'''),
dcc.Graph(
id='example-graph',
figure={
'data': [
{'x': [1, 2, 3], 'y': [4, 1, 2], 'type': 'bar', 'name': 'SF'},
{'x': [1, 2, 3], 'y': [2, 4, 5], 'type': 'bar', 'name': u'Montréal'},
],
'layout': {
'title': 'Dash Data Visualization'
}
}
)
])
if __name__ == '__main__':
app.run_server(debug=True, host='0.0.0.0')
当我在the_ip_address/dashGAF 访问我的dash 应用程序时，我得到一个500 Internal Server Error。检查我看到的error.log：
[Sat Jun 20 04:42:59.502528 2020] [wsgi:error] [pid 6064:tid 140622992238336] [client 118.210.193.245:50042] mod_wsgi (pid=6064): Exception occurred processing WSGI script '/var/www/html/wsgi/dashGAF.wsgi'.
[Sat Jun 20 04:42:59.502675 2020] [wsgi:error] [pid 6064:tid 140622992238336] [client 118.210.193.245:50042] TypeError: 'Dash' object is not callable
非常感谢您在解决此问题方面的任何帮助！此外，任何有关更改配置文件的建议都会有所帮助。
更多细节：
- 我收到模块导入错误，例如 /var/log/apache2/error.log 中的以下内容：
[2020 年 6 月 20 日星期六 03:38:58.556219] [wsgi:error] [pid 583:tid 140297735726848] [client 118.210.193.245:55574] 文件“/home/ubuntu/dashboards/dashGAF.py”，第 2 行, 在 [2020 年 6 月 20 日星期六 03:38:58.556265] [wsgi:error] [pid 583:tid 140297735726848] [client 118.210.193.245:55574] 导入破折号 [2020 年 6 月 20 日星期六 03:38:58.556285] [wsgi:error] [pid 583:tid 140297735726848] [client 118.210.193.245:55574] ImportError: No module named dash
我可以通过 sudo pip install dash==1.13.2 解决这个问题。
-
我已经制作了所有的 *.py 和 *.wsgi 文件
-rwxr-xr-x -
我使用
sudo a2ensite dash.conf启用了站点配置，并使用udo systemctl reload apache2重新加载了配置。 -
我相信正在运行的python版本是python2.7（基于apache error.log）；不确定如何指定 2.7 或 3。
-
如果我将 dashGAF.wsgi 编辑为
from dashGAF import server as application，我会收到 500 内部错误，但服务器日志中有以下详细信息：
[Sun Jun 21 06:33:28.181450 2020] [wsgi:error] [pid 12237:tid 139670549669632] [client 118.210.193.245:52221] mod_wsgi (pid=12237): Target WSGI script '/var/www/html/wsgi/dashGAF.wsgi' cannot be loaded as Python module.
[Sun Jun 21 06:33:28.181512 2020] [wsgi:error] [pid 12237:tid 139670549669632] [client 118.210.193.245:52221] mod_wsgi (pid=12237): Exception occurred processing WSGI script '/var/www/html/wsgi/dashGAF.wsgi'.
[Sun Jun 21 06:33:28.181545 2020] [wsgi:error] [pid 12237:tid 139670549669632] [client 118.210.193.245:52221] Traceback (most recent call last):
[Sun Jun 21 06:33:28.181577 2020] [wsgi:error] [pid 12237:tid 139670549669632] [client 118.210.193.245:52221] File "/var/www/html/wsgi/dashGAF.wsgi", line 4, in <module>
[Sun Jun 21 06:33:28.181685 2020] [wsgi:error] [pid 12237:tid 139670549669632] [client 118.210.193.245:52221] from dashGAF import server as application
[Sun Jun 21 06:33:28.181714 2020] [wsgi:error] [pid 12237:tid 139670549669632] [client 118.210.193.245:52221] ImportError: cannot import name server
可能有一个有用的细节，它说“目标 WSGI 脚本 '/var/www/html/wsgi/dashGAF.wsgi' 不能作为 Python 模块加载。” ??
- 如果我将 dashGAF.wsgi 编辑为
application = app.server，我会收到 404 Not Found：
from dashGAF import app
application = app.server
【问题讨论】：
标签： python apache mod-wsgi wsgi plotly-dash