Read:

  http://code.google.com/p/modwsgi/wiki/ConfigurationIssues

about permission denied problem.

Haven't had a chance to read rest of email yet, will do so later when have time.

Graham

2009/6/1 Evgeny <evgeny.fad...@gmail.com>:
>
> Hi Graham,
>
> Thank you for your answer. I've tried to do what you've suggested -
> that one change - make WSGIDaemonProcess and WSGIProcessGroup match
>
> Now I have in the error log:
> (13)Permission denied: mod_wsgi (pid=4456): Unable to connect to WSGI
> daemon process 'web2py' on '/etc/httpd/logs/wsgi.4427.0.1.sock' after
> multiple attempts
>
> It used to be:
> [Sun May 31 22:57:18 2009] [error] [client 128.200.203.33] No WSGI
> daemon process called 'web2py' has been configured: /var/www/vhosts/
> default/htdocs/wsgi/web2py/applications/admin/controllers/appadmin.py
> - when WSGIProcessGroup was not the same as WSGIDaemonProcess.
>
> Does value of WSGIDaemonProcess have to be path (?) to daemon
> executable (?) or python script (?) relative to some directory (?)
> Or python script has to be in python path?
> is .py extension assumed, so process name omits .py ?
> - this is something I am confused about.
>
> I do have to run this wsgi in the virtual host, because I use server
> for several websites (some use php) so I think can't put wsgi script
> at the server root.
>
> Now answers to your three questions:
> 1) Where do you want the web2py application mounted, at the root of
> the web server, ie., '/', or a sub URL of the site? Is the reason for
> aliasing a whole directory because you will have multiple WSGI
> applications hosted at different sub URLs?
>
> - I don't really have to mount the whole directory - but you're right
> - I did so just to be able to try
> all the apps that came with web2py - and I wasn't even sure which one
> should be in the url...
>
> 2) You appear to want to use daemon mode, but do you want to use a
> multi threaded or single threaded process?
>
> -at this point I don't care. because I'm just trying to wake it up on
> a (remote) apache server.
> (I've seen options to WSGIDaemonProcess for threads and processes -
> didn't touch them yet)
>
> 3) What requirements does web2py have for the web server to serve
> static files on its behalf? If there are static files the web server
> needs to serve up, what URL are they served from and where in the file
> system are they located?
>
> - none at the moment, what if indeed I do have static stuff in some
> dir
> how can I have that within the same virtual host?
> - in fact I would like to eventually be able to have PHP, web2py and
> static content
> co-exist within the same virtual host.
> -would setting WSGIScriptAlias to a concrete resolve the issue?
>
> Kind regards,
> Evgeny.
>
>
>
> On May 31, 5:42 pm, Graham Dumpleton <graham.dumple...@gmail.com>
> wrote:
>> On Jun 1, 10:06 am, Evgeny <evgeny.fad...@gmail.com> wrote:
>>
>> > Hi I'm trying to run web2py as deamon
>>
>> > and in apache error_log I'm getting
>> > [Sun May 31 20:06:09 2009] [info] mod_wsgi (pid=3673): Attach
>> > interpreter ''.
>>
>> There is nothing wrong with that message, it is an informational
>> message only and indicates that mod_wsgi has merely done its
>> initialisation to grab a handle to the Python main interpreter within
>> that process.
>>
>> > interpreter is httpd, not what I want - and the app fails
>>
>> > Could somebody shed some light on this issue?
>> > Thank you!
>> > Evgeny. (more info is below)
>>
>> > in my httpd.conf i got:
>> > -------------------------------------
>> > User apache
>> > Group apache
>>
>> > <VirtualHost...>
>>
>> >      DocumentRoot /var/www/vhosts/default/htdocs/wsgi/web2py
>>
>> Why have you changed DocumentRoot to that value?
>>
>> I hope you aren't just copying what the web2py book and web2py people
>> are telling you. Practically every configuration I have seen from the
>> web2py people in regard to using web2py with Apache/mod_wsgi has been
>> wrong in some way. The main example they tell people to use is
>> actually a bit dangerous and makes your Apache web server less secure
>> than it could be due to using what would be regarded as being bad
>> practice. They seem not to have much idea of how to use Apache
>> properly. However, because they got upset at me at one point and asked
>> me not to answer questions on the web2py lists, I haven't bothered to
>> try and correct all the wrong posts on their list.
>>
>> >      WSGIScriptAlias / /var/www/vhosts/default/htdocs/wsgi/web2py/
>>
>> Why are you aliasing the whole directory? Why aren't you just mounting
>> the specific script on the root of the web server?
>>
>> With the way you have it, your URL will need to have the name of the
>> WSGI script in the URL, ie.,
>>
>>   /web2py.py
>>
>> Is that way you really want?
>>
>> From what I have seen, web2py doesn't necessarily always work properly
>> when it isn't mounted at the root of the web server. At the least you
>> possibly need to do some manual configuration or fiddles in URL
>> mapping to get it to work. Seems it may not honour SCRIPT_NAME in WSGI
>> environment as mount point properly. Whether this is all still true
>> for latest web2py versions am not sure, but do keep seeing people
>> having problems with mounting web2py at a sub URL.
>>
>> >      WSGIDaemonProcess web2py.py
>> >      WSGIProcessGroup web2py
>>
>> Your WSGIProcessGroup argument for name of process group, should match
>> the name you gave it in WSGIDaemonProcess directive. In your case that
>> isn't happening. This at least is the absolute minimum change you need
>> to make if you don't care about the other issues I am raising.
>>
>> You also shouldn't need the WSGIProcessGroup directive here anyway, as
>> you have it within the Directory directive container below.
>>
>> > </VirtualHost>
>>
>> > #Below I have
>>
>> > <Directory "/var/www/vhosts/default/htdocs/wsgi/web2py/">
>> >     Order allow,deny
>> >     Allow from all
>> >     WSGIProcessGroup web2py
>> > </Directory>
>>
>> Note that that Directory directive container would still normally be
>> within the VirtualHost as you likely only want to open up access to
>> that directory to that VirtualHost and not inadvertently some other
>> virtual host. Opening it up to all virtual hosts may have security
>> implications if this is a shared system and specific users virtual
>> hosts are setup with option to allow Apache to follow symbolic links
>> when resolving URLs.
>>
>> > ----------------------------------------
>> > if I type
>> > ls -l /var/www/vhosts/default/htdocs/wsgi/web2py/web2py.py
>>
>> > I get:
>> > -rwxr-xr-x 1 root root 379 May 31 03:02 /var/www/vhosts/default/htdocs/
>> > wsgi/web2py/web2py.py
>>
>> Unless you are happy to make the one change to WSGIProcessGroup and
>> just get on with trying to make it all work regardless, perhaps you
>> should start over and answer the following questions for me. Then I'll
>> tell you what you should be using.
>>
>> 1. Where do you want the web2py application mounted, at the root of
>> the web server, ie., '/', or a sub URL of the site? Is the reason for
>> aliasing a whole directory because you will have multiple WSGI
>> applications hosted at different sub URLs?
>>
>> 2. You appear to want to use daemon mode, but do you want to use a
>> multi threaded or single threaded process?
>>
>> Once upon a time the default configuration of web2py was such that it
>> wasn't technically safe to use in a multithreaded process which was
>> shared with code which wanted to independently fiddle with the current
>> working directory. This is because web2py used the bad practice of
>> changing the working directory on each request. A change was
>> apparently made to it to allow it to use absolute paths and not rely
>> on changing the working directory, but this was optional and not the
>> default behaviour. Anyway, not sure what it is you may have to do to
>> make web2py completely safe to use in a multi threaded process, or
>> whether proper thread safety is now the default, or the problems
>> otherwise addressed.
>>
>> 3. What requirements does web2py have for the web server to serve
>> static files on its behalf? If there are static files the web server
>> needs to serve up, what URL are they served from and where in the file
>> system are they located?
>>
>> Graham
> >
>

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