On Sun, May 12, 2024 at 10:22 PM A McBain <[email protected]> wrote:
>
> On Sun, May 12, 2024 at 10:05 PM A McBain <[email protected]> wrote:
> >
> > On Sun, May 12, 2024 at 9:47 PM Graham Dumpleton
> > <[email protected]> wrote:
> > >
> > >
> > >
> > > On 13 May 2024, at 2:33 PM, A McBain <[email protected]> wrote:
> > >
> > > The old one is running on the same physical server, just with its own
> > > Apache config and own subdomain. As to having multiple things running,
> > > that's why I set WSGIApplicationGroup to %{SERVER} but just in case I
> > > changed it explicitly to "enfilade.asmcbain.net" (no effect, but
> > > shouldn't hurt anything to keep the change).
> > >
> > >
> > > The WSGIApplicationGroup directive sets which Python interpreter context
> > > is used. It is distinct from the daemon process group.
> > >
> > > You want each WSGI application instance to run in a different mod_wsgi
> > > daemon process group if using the main Python interpreter context
> > > (application group %{GLOBAL}).
> > >
> > > So what you want is for each VirtualHost to use a different named
> > > mod_wsgi dameon process group.
> > >
> > > <VirtualHost ...>
> > > ServerName site-1.example.com
> > > WSGIDaemonProcess site-1 \
> > > user=asmcbain group=asmcbain \
> > > display-name='%{GROUP}' \
> > > lang='en_US.UTF-8' \
> > > locale='en_US.UTF-8' \
> > > threads=5 \
> > > queue-timeout=45 \
> > > socket-timeout=60 \
> > > connect-timeout=15 \
> > > request-timeout=60 \
> > > inactivity-timeout=0 \
> > > startup-timeout=15 \
> > > deadlock-timeout=60 \
> > > graceful-timeout=15 \
> > > eviction-timeout=0 \
> > > restart-interval=0 \
> > > shutdown-timeout=5 \
> > > maximum-requests=0 \
> > > python-home=/home/asmcbain/enfilade/.env \
> > > python-path=/home/asmcbain/enfilade
> > > WSGIProcessGroup site-1
> > > WSGIApplicationGroup %{GLOBAL}
> > > WSGIScriptAlias / /home/asmcbain/enfilade/atcid/wsgi.py
> > > </VirtualHost>
> > >
> > > <VirtualHost ...>
> > > ServerName site-2.example.com
> > > WSGIDaemonProcess site-2 \
> > > user=asmcbain group=asmcbain \
> > > display-name='%{GROUP}' \
> > > lang='en_US.UTF-8' \
> > > locale='en_US.UTF-8' \
> > > threads=5 \
> > > queue-timeout=45 \
> > > socket-timeout=60 \
> > > connect-timeout=15 \
> > > request-timeout=60 \
> > > inactivity-timeout=0 \
> > > startup-timeout=15 \
> > > deadlock-timeout=60 \
> > > graceful-timeout=15 \
> > > eviction-timeout=0 \
> > > restart-interval=0 \
> > > shutdown-timeout=5 \
> > > maximum-requests=0 \
> > > python-home=/home/asmcbain/enfilade/.env \
> > > python-path=/home/asmcbain/enfilade
> > > WSGIProcessGroup site-2
> > > WSGIApplicationGroup %{GLOBAL}
> > > WSGIScriptAlias / /home/asmcbain/enfilade/atcid/wsgi.py
> > > </VirtualHost>
> > >
> > > So each site should have different name to WSGIDaemonProcess, with
> > > matching WSGIProcessGroup, and WSGIApplicationGroup should be %{GLOBAL}
> > > for both, not {SERVER}.
> > >
> > > The {SERVER} value has a different meaning and best avoiding it.
> > >
> > > So lets make sure each is running in separate daemon process groups.
> > >
> > > BTW, also make sure that somewhere outside of all VirtualHost definitions
> > > you add:
> > >
> > > WSGIRestrictEmbedded On
> >
> > OK, I updated both the old site and the new one to make
> > WSGIApplicationGroup %{GLOBAL}. They always had different
> > WSGIProcessGroup values.
> >
> > I also added WSGIRestrictEmbedded to the base Apache config.
> >
> > Apache restarts fine, and the old site loads up but the new one still
> > prints the import math error even after the changes. 😕
> >
> > I've attached the relevant bits to both.
> >
> > - Alastair
>
> Originally I'd compiled this Python 3.11 myself, but I've just double
> checked and verified Python 3.11 and the -dev package are from
> official packages and not my own manual build+install.
>
> I also checked that inside or outside of the virtual env (results are
> the same) I can run the Python interpreter shell and do:
>
> import math
> math.ceil(1.1)
>
> I don't get any errors.
>
> - Alastair
Update to that. The modules loaded are different between the daemon
one and the regular interpreter.
Doing "print(sys.builtin_module_names)" results in the following for
the daemon version:
[Sun May 12 22:31:33.744235 2024] [wsgi:error] [pid 7430:tid
140134038087360] ('_abc', '_ast', '_codecs', '_collections',
'_functools', '_imp', '_io', '_locale', '_operator', '_signal',
'_sre', '_stat', '_string', '_symtable', '_thread', '_tokenize',
'_tracemalloc', '_warnings', '_weakref', 'atexit', 'builtins',
'errno', 'faulthandler',
'gc', 'itertools', 'marshal', 'posix', 'pwd', 'sys', 'time', 'xxsubtype')
And this substantially longer list for the one I just run from the CLI myself:
('_abc', '_ast', '_bisect', '_blake2', '_codecs', '_collections',
'_csv', '_datetime', '_elementtree', '_functools', '_heapq', '_imp',
'_io', '_locale', '_md5', '_opcode', '_operator', '_pickle',
'_posixsubprocess', '_random', '_sha1', '_sha256', '_sha3', '_sha512',
'_signal', '_socket', '_sre', '_stat', '_statistics', '_string',
'_struct', '_symtable', '_thread', '_tokenize', '_tracemalloc',
'_warnings', '_weakref', 'array', 'atexit', 'binascii', 'builtins',
'cmath', 'errno', 'faulthandler', 'fcntl', 'gc', 'grp', 'itertools',
'marshal', 'math', 'posix', 'pwd', 'pyexpat', 'select', 'spwd', 'sys',
'syslog', 'time', 'unicodedata', 'xxsubtype', 'zlib')
Now I just have to figure out why.
> >
> > >
> > > This will cause an error if mod_wsgi daemon process groups aren't being
> > > configured properly.
> > >
> > > Graham
> > >
> > >
> > > This is the result of the wsgi.prod.py printouts:
> > >
> > > [Sun May 12 21:29:11.788518 2024] [wsgi:error] [pid 5671:tid
> > > 140047682610880] sys.prefix '/home/asmcbain/enfilade/.env'
> > > [Sun May 12 21:29:11.788639 2024] [wsgi:error] [pid 5671:tid
> > > 140047682610880] sys.path ['/home/asmcbain/enfilade',
> > > '/usr/lib/python311.zip', '/usr/lib/python3.11',
> > > '/usr/lib/python3.11/lib-dynload',
> > > '/home/asmcbain/enfilade/.env/lib/python3.11/site-packages']
> > >
> > > Alastair
> > >
> > > On Sun, May 12, 2024 at 9:24 PM Graham Dumpleton
> > > <[email protected]> wrote:
> > >>
> > >>
> > >> On 13 May 2024, at 2:02 PM, A McBain <[email protected]> wrote:
> > >>
> > >>
> > >> Hi, I looked at previous messages and others on StackOverflow but none
> > >> seem to solve my issue.
> > >>
> > >> I have an app I wrote working perfectly fine under Python 3.11 with
> > >> mod_wsgi and Apache 2.
> > >>
> > >> I did a bunch of development on the app (upgraded django, new features),
> > >> and set up a new checkout of that on my server, with its own virtual
> > >> environment (using venv). It uses effectively the same config (different
> > >> subdomain) in Apache2 as the original older copy, but the new one fails
> > >> with an import error while the old one is still chugging along.
> > >>
> > >>
> > >> When you say "old one is still chugging along" can you confirm you are
> > >> saying that the existing one is still running on the same server at the
> > >> same time, or it is a completely new server you have set up.
> > >>
> > >> I double checked the instructions at
> > >> https://docs.djangoproject.com/en/5.0/howto/deployment/wsgi/modwsgi/
> > >>
> > >> I've also re-verified the mod_wsgi I installed (via pip) matches the
> > >> Python version I'm using (both are Python 3.11).
> > >>
> > >> I also tried:
> > >>
> > >> Removing the python-path argument
> > >>
> > >> The mod_wsgi docs suggest I don't need that if I specify python-home?
> > >>
> > >> Removing python-path if it refers to site-packages directory of virtual
> > >> environment specified to python-home is okay as path would be redundant.
> > >> If python-path is used to tell it where your Django project is, that
> > >> still needs to stay.
> > >>
> > >> Setting WSGIApplicationGroup to %{GLOBAL}
> > >>
> > >> That is recommended, but if you are hosting multiple WSGI applications
> > >> on the same server, they would need to be delegated to different
> > >> mod_wsgi daemon process groups.
> > >>
> > >> Unfortunately the error didn't change at all after trying those.
> > >>
> > >> I've attached the relevant apache2 config section which includes all the
> > >> mod_wsgi-setup (the rest is just redirects, ssl stuff, aliases, etc.)
> > >>
> > >> I also attached the error from the log. It looks like it's trying to use
> > >> the system Python instead of the one that exists in my .env (virtual
> > >> environment) directory.
> > >>
> > >>
> > >> The virtual environment doesn't have a copy of Python stdlib files so
> > >> they are still imported from the system Python the virtual environment
> > >> was created from. The virtual environment effectively only has its own
> > >> site-packages directory.
> > >>
> > >> I'm banging my head as to why this worked before but not now so any help
> > >> is much appreciated. Thank you! 🙂
> > >>
> > >> Other details:
> > >>
> > >> wsgi.prod.py is the default wsgi.py, just modified to load
> > >> settings.prod.py
> > >> The server is Devuan Daedalus
> > >>
> > >>
> > >> At the start of your WSGI script file add:
> > >>
> > >> import sys
> > >> print('sys.prefix', repr(sys.prefix))
> > >> print('sys.path', repr(sys.path))
> > >>
> > >> and check Apache logs for what paths it is using.
> > >>
> > >> Compare that to the working site.
> > >>
> > >> Post what you learn from that.
> > >>
> > >> Graham
> > >>
> > >>
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> > >
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