> On 21 Oct 2022, at 6:40 pm, Malcolm Cook <[email protected]> wrote:
>
> Hello,
>
> I have configured apache2 for running any .wsgi apps out of ~/public_html
>
> It works for a simple ~/public_html/hello_world.wsgi
>
> Hooray!
>
> However, I am having trouble when my app uses
>
> /usr/bin/python3 -m venv venv
>
> with the simplest of dash apps.
>
> I have so far learned to include in my app.wsgi the following:
>
> site.addsitedir('/home/mec/public_html/dash101/dash101.wsgi')
The site.addsitedir() function accepts a directory, not a file. For working
with virtual environments ensure you read
https://modwsgi.readthedocs.io/en/master/user-guides/virtual-environments.html
> allowing the app to find the dash modules installed into its venv when run
> under apache mod_wsgi.
>
> The app now works from the command line; when run under apache mod_wsgi it
> only successfully finds the modules in the venv but then fails with:
>
> [root@hd1991356yb mec]# [Fri Oct 21 01:04:29.974555 2022] [wsgi:info] [pid
> 69391] mod_wsgi (pid=69391): Create interpreter
> 'hd1991356yb.sgc.loc|/~mec/dash101/app.wsgi'.
> [Fri Oct 21 01:04:29.989457 2022] [wsgi:info] [pid 69391] [client
> 10.2.20.25:41124] mod_wsgi (pid=69391, process='',
> application='hd1991356yb.sgc.loc|/~mec/dash101/app.wsgi'): Loading Python
> script file '/home/mec/public_html/dash101/app.wsgi'., referer:
> http://hd1991356yb/~mec/dash101/
> [Fri Oct 21 01:04:30.891229 2022] [wsgi:error] [pid 69391]
> /home/mec/public_html/dash101/app.py:2: UserWarning:
> [Fri Oct 21 01:04:30.891279 2022] [wsgi:error] [pid 69391] The
> dash_html_components package is deprecated. Please replace
> [Fri Oct 21 01:04:30.891289 2022] [wsgi:error] [pid 69391] `import
> dash_html_components as html` with `from dash import html`
> [Fri Oct 21 01:04:30.891298 2022] [wsgi:error] [pid 69391] import
> dash_html_components as html
> [Fri Oct 21 01:04:33.661364 2022] [wsgi:error] [pid 69391]
> /home/mec/public_html/dash101/app.py:4: UserWarning:
> [Fri Oct 21 01:04:33.661397 2022] [wsgi:error] [pid 69391]
> [Fri Oct 21 01:04:33.661403 2022] [wsgi:error] [pid 69391]
> [Fri Oct 21 01:04:33.661408 2022] [wsgi:error] [pid 69391] The
> dash_core_components package is deprecated. Please replace
> [Fri Oct 21 01:04:33.661413 2022] [wsgi:error] [pid 69391] `import
> dash_core_components as dcc` with `from dash import dcc`
> [Fri Oct 21 01:04:33.661417 2022] [wsgi:error] [pid 69391]
> [Fri Oct 21 01:04:34.825419 2022] [core:info] [pid 69391] [client
> 10.2.20.25:41124] AH00128: File does not exist:
> /var/www/html/_dash-component-suites/dash/deps/[email protected]_6_2m1666328797.12.1.min.js,
> referer: http://hd1991356yb/~mec/dash101/app.wsgi/
>
> I am for now ignoring the deprecation warnings.
>
> I error comes from the app looking for dash's .js files within /var/www/html
> (apache's root).
>
> How can my app.wsgi alter this path?
>
> I tried adding this to my app.wsgi:
>
> os.environ["DASH_URL_BASE_PATHNAME"] = "/home/mec/public_html/dash101/"
That is a file system path you are giving it, not a URL path the web server
understands.
> which does effect where the js files are sought, only not correctly, as the
> error is now:
>
> [Fri Oct 21 01:48:29.019458 2022] [core:info] [pid 8597] [client
> 10.2.20.25:43445] AH00128: File does not exist:
> /var/www/html/home/mec/public_html/dash101/_dash-component-suites/dash/deps/[email protected]_6_2m1666328797.12.1.min.js,
> referer: http://hd1991356yb/~mec/dash101/app.wsgi
Where is the "_dash-component-suites" actually located on the file system. That
directory should be copied into /var/www/html and DASH_URL_BASE_PATHNAME not
set, or, you need to set up the Apache Alias directory to map some URL prefix
to filesystem location where it is.
> So far, apache2 is configured with:
>
> LoadModule wsgi_module
> /usr/lib64/python3.6/site-packages/mod_wsgi/server/mod_wsgi-py36.cpython-36m-x86_64-linux-gnu.so
>
> <IfModule mod_userdir.c>
> UserDir public_html
> </IfModule>
>
> <Directory "/home/*/public_html">
> AllowOverride FileInfo AuthConfig Limit Indexes
> Options MultiViews Indexes SymLinksIfOwnerMatch IncludesNoExec ExecCGI
> Require method GET POST OPTIONS
> AddHandler cgi-script .cgi
> AddHandler wsgi-script .wsgi
> </Directory>
>
> I am not issuing any other wSGI configuration directives in my apache2
> configuration.
>
> Perhaps I should not expect apache2+userdir+mod_wsgi to work at all...???
In general it is best to avoid using mod_userdir with mod_wsgi as it confuses
typical WSGI application URL handling.
Why are you trying to use mod_userdir. Do you not control the whole Apache
server?
> All advice as to how to proceed very welcome.
>
> update: I've now read
> https://groups.google.com/g/modwsgi/c/Lnik3YHFujA/m/3QRuwEZXP6sJ and have
> tried the approach mentioned there:
>
> WSGIRestrictEmbedded On
>
> WSGIDaemonProcess mec
> <Directory /home/mec/public_html>
> WSGIProcessGroup mec user=mec
> </Directory>
>
> I modifed it remove the (now deprecated?) `user=mec` (which causes apache
> restart to fail)
>
> But it did not alter the error sequence I am getting.
>
> That advice is from 2011. Perhaps things have changed and there is now a
> best approach to this (possibly including a "means for dynamic creation of
> daemon
> process groups")...???
Daemon process groups still have to be defined up from.
> I also read https://groups.google.com/g/modwsgi/c/K9hBYI07EsM/m/A_Ao9g4vFgAJ
> but could not determine if there was relevant advice there.
>
> Thanks !
>
> ~Malcolm COok
>
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