python - os.makedirs leads to OSError on Amazon AWS Ubuntu instance -


on ubuntu aws instance, trying set flask service after setting apache.

in /var/www/html/myapp/, have these files, among others:

myapp.py

myapp.wsgi

here contents of myapp.wsgi:

import sys sys.path.insert(0, '/var/www/html/myapp')  myapp import app application

and here contents of /etc/apache2/sites-enabled/000-default.conf:

<virtualhost *:80>     # servername directive sets request scheme, hostname , port     # server uses identify itself. used when creating     # redirection urls. in context of virtual hosts, servername     # specifies hostname must appear in request's host: header     # match virtual host. default virtual host (this file)     # value not decisive used last resort host regardless.     # however, must set further virtual host explicitly.     #servername www.example.com      serveradmin webmaster@localhost     documentroot /var/www/html      wsgidaemonprocess charter threads=5     wsgiscriptalias / /var/www/html/myapp/myapp.wsgi      <directory flaskapp>         wsgiprocessgroup myapp         wsgiapplicationgroup %{global}         order deny,allow         allow     </directory>      # available loglevels: trace8, ..., trace1, debug, info, notice, warn,     # error, crit, alert, emerg.     # possible configure loglevel particular     # modules, e.g.     #loglevel info ssl:warn      errorlog ${apache_log_dir}/error.log     customlog ${apache_log_dir}/access.log combined      # configuration files conf-available/,     # enabled or disabled @ global level, possible     # include line 1 particular virtual host. example     # following line enables cgi configuration host     # after has been globally disabled "a2disconf".     #include conf-available/serve-cgi-bin.conf </virtualhost>

and in myapp.py, have code make directory:

if not os.path.exists("dir"):     os.makedirs("dir")

but when navigate browser http://my-ubuntu-ec2-address.compute-1.amazonaws.com/myapp/, returns 500 error.

when check error log @ /var/log/apache2/error.log, see these lines:

[mon aug 14 22:57:06.346698 2017] [:error] [pid 6641:tid 139812646708992] [client ip-address-removed:48792] mod_wsgi (pid=6641): target wsgi script '/var/www/html/myapp/myapp.wsgi' cannot loaded python module. [mon aug 14 22:57:06.346734 2017] [:error] [pid 6641:tid 139812646708992] [client ip-address-removed:48792] mod_wsgi (pid=6641): exception occurred processing wsgi script '/var/www/html/myapp/myapp.wsgi'. [mon aug 14 22:57:06.346750 2017] [:error] [pid 6641:tid 139812646708992] [client ip-address-removed:48792] traceback (most recent call last): [mon aug 14 22:57:06.346768 2017] [:error] [pid 6641:tid 139812646708992] [client ip-address-removed:48792]   file "/var/www/html/myapp/myapp.wsgi", line 4, in <module> [mon aug 14 22:57:06.346791 2017] [:error] [pid 6641:tid 139812646708992] [client ip-address-removed:48792]     myapp import app application [mon aug 14 22:57:06.346797 2017] [:error] [pid 6641:tid 139812646708992] [client ip-address-removed:48792]   file "/var/www/html/myapp/myapp.py", line 12, in <module> [mon aug 14 22:57:06.346806 2017] [:error] [pid 6641:tid 139812646708992] [client ip-address-removed:48792]     os.makedirs(graphicsfiles) [mon aug 14 22:57:06.346811 2017] [:error] [pid 6641:tid 139812646708992] [client ip-address-removed:48792]   file "/usr/lib/python2.7/os.py", line 157, in makedirs [mon aug 14 22:57:06.346820 2017] [:error] [pid 6641:tid 139812646708992] [client ip-address-removed:48792]     mkdir(name, mode) [mon aug 14 22:57:06.346837 2017] [:error] [pid 6641:tid 139812646708992] [client ip-address-removed:48792] oserror: [errno 13] permission denied: 'dir'

what need change ensure app has permission make directory or file?

you can't use relative path names, nor use directory apache user can't write to. see documentation at:

your apache configuration wrong.

<directory flaskapp>     wsgiprocessgroup myapp     wsgiapplicationgroup %{global}     order deny,allow     allow </directory>

using flaskapp argument here directory isn't correct. argument should directory wsgi script file located in.

<directory /var/www/html/myapps>     wsgiprocessgroup myapp     wsgiapplicationgroup %{global}     order deny,allow     allow </directory>

a further issues is bad practice put source code under directory specified documentroot. if make mistake in apache configuration, people download source code, possibly including configuration secrets in source code.


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