Setting up a Flask app in a Amazon EC2 instance, getting ImportError: No module named flask

Question

I'm having issues trying to deploy my Flask app on an Amazon EC2 server.

I followed a tutorial here and here as well .

When I go to run my server, after doing sudo apachect1 restart I get a 500 Internal Error when navigating to my ec2 site. Checking the log I get the following error.

[Tue Jun 20 19:10:48.429468 2017] [wsgi:error] ImportError: No module named flask, referer: http://ec2-<MY-EC2-URL>.amazonaws.com/

Though yet, through the PuTTY I am using to access the EC2 instance, I can see Python and flask are installed doing...

Python 2.7.12 (default, Nov 19 2016, 06:48:10)
[GCC 5.4.0 20160609] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import flask
>>> flask.__version__
'0.12.2'

Which I thought it/read it may be an issue of not finding my Python path. So I added in my configuration file for apache the python-path=/usr/lib/python2.7 ....

000-default.conf

<VirtualHost *:80>
    # The ServerName directive sets the request scheme, hostname and port that
    # the server uses to identify itself. This is used when creating
    # redirection URLs. In the context of virtual hosts, the ServerName
    # specifies what hostname must appear in the request's Host: header to
    # match this virtual host. For the default virtual host (this file) this
    # value is not decisive as it is used as a last resort host regardless.
    # However, you must set it for any further virtual host explicitly.
    #ServerName www.example.com

    ServerAdmin webmaster@localhost
    DocumentRoot /var/www/html

    WSGIDaemonProcess leu threads=5 python-path=/usr/lib/python2.7
    WSGIScriptAlias / /var/www/html/leu/app.wsgi

    <Directory leu>
        WSGIProcessGroup leu
        WSGIApplicationGroup %{GLOBAL}
        Order deny,allow
        Allow from all
    </Directory>

    # Available loglevels: trace8, ..., trace1, debug, info, notice, warn,
    # error, crit, alert, emerg.
    # It is also possible to configure the loglevel for particular
    # modules, e.g.
    #LogLevel info ssl:warn

    ErrorLog ${APACHE_LOG_DIR}/error.log
    CustomLog ${APACHE_LOG_DIR}/access.log combined

    # For most configuration files from conf-available/, which are
    # enabled or disabled at a global level, it is possible to
    # include a line for only one particular virtual host. For example the
    # following line enables the CGI configuration for this host only
    # after it has been globally disabled with "a2disconf".
    #Include conf-available/serve-cgi-bin.conf
</VirtualHost>

# vim: syntax=apache ts=4 sw=4 sts=4 sr noet

Yet still no luck. I've seen a lot with setting up Virtual Environments but I haven't done that. I originally created the project in PyCharm using Python 3.5, but then I went back through the project settings and created it with Python 2.7 and added all the corresponding imports. Still no luck when I did that.

Should I restart again with a virtualenv? Is there something I am missing with setting up Apache?

I was able to get the splash page for Apache saying I set it up correctly.

app.wsgi

import sys
sys.path.insert(0, 'var/www/html/leu')

from app import app as application

Any help?

EDIT: Also tried changing the path to Python in my Apache config file above to /usr/local/lib/python2.7 but still no luck

Answer 1

I know i am way too late....Hope this is useful to someone is struggling!

ServerName your EC2 instance

you have to mention your EC2 instance

Answer 2

使用 sudo -H 安装您的模块。例如 sudo -H pp install flask 如果仍然存在，那么您必须更改配置以使用 python 2.7 而不是 python3