I have doubt,
I is it possible to tell apache server during runtime i.e., dynamically to
use specific wsgi daemon configuration like python-path,
wsgidaemonscriptalias based on specific http_host,
And also tried below configuration
#myapp Webservice Config
Listen 9289
<VirtualHost *:9289>
<If "%{HTTP_HOST} == 'abc.com'">
SetEnv serverName abc.com
SetEnv errorLogPath /var/log/abc_webservices.log
SetEnv daemonName 9289abc
SetEnv pythonPath
/home/client-builds/abc/myapp:/home/client-builds/abc/shared
SetEnv wsgiScriptAlias /home/client-builds/abc/myapp/conf/wsgi.py
SetEnv directoryPath /home/client-builds/abc/myapp/conf
</If>
<If "%{HTTP_HOST} == 'xyz.com'">
SetEnv serverName xyz.com
SetEnv errorLogPath /var/log/xyz_webservices.log
SetEnv daemonName 9289xyz
SetEnv pythonPath
/home/client-builds/xyz/myapp:/home/client-builds/xyz/shared
SetEnv wsgiScriptAlias /home/client-builds/xyz/myapp/conf/wsgi.py
SetEnv directoryPath /home/client-builds/xyz/myapp/conf
</If>
ServerName ${serverName}
ErrorLog ${errorLogPath}
WSGIPassAuthorization On
WSGIDaemonProcess ${daemonName} inactivity-timeout=30
python-path=${pythonPath} display-name=%{GROUP}
WSGIProcessGroup ${daemonName}
WSGIApplicationGroup %{GLOBAL}
WSGIScriptAlias / ${wsgiScriptAlias}
<Directory ${directoryPath}>
<Files wsgi.py>
Require all granted
</Files>
</Directory>
</VirtualHost>
But while iam trying to access abc.com or xyz.com it is giving me error
<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
<html><head>
<title>403 Forbidden</title>
</head><body>
<h1>Forbidden</h1>
<p>You don't have permission to access this resource.</p>
</body></html>
RajKumar
On Monday 5 August 2024 at 10:05:49 UTC+5:30 RajKumar Ambadipelli wrote:
> Understood.
>
> Thankyou
> RajKumar
>
> On Monday 5 August 2024 at 09:39:47 UTC+5:30 Graham Dumpleton wrote:
>
>> Memory will still be claimed by the process.
>>
>> I already told you to use:
>>
>> inactivity-timeout=30
>>
>> on WSGIDaemonProcess to have the daemon processes restart after non
>> activity for a while so memory will return to base amount for Python
>> interpreter.
>>
>> Graham
>>
>> On 5 Aug 2024, at 2:06 PM, RajKumar Ambadipelli <[email protected]>
>> wrote:
>>
>> After processing request with a wsgi daemon what happens to cpu and
>> memory footprints that is the cpu spike's that got during processing
>> request will be gone after processing request but what about the memory
>> footprint
>> (ram usage) does it will remain in the cache even after completing
>> requests if so how to gracefully remove it without disturbing the ongoing
>> request is it even possible.
>>
>> RajKumar
>> On Thursday 1 August 2024 at 12:35:09 UTC+5:30 Graham Dumpleton wrote:
>>
>>> The number of process/threads defined in WSGIDaemonProcess is completely
>>> independent of MPM settings and which MPM module (prefork/event/worker) is
>>> being used.
>>>
>>> Yes having 15 threads means 15 requests can be handled concurrently, but
>>> do not be deceived in thinking that is the maximum throughput in requests
>>> per second you can handle and that you need to set it higher. In fact I
>>> actually recommend people drop it down to 5 threads per process, as 3-5
>>> threads process is a bit of a sweet spot for getting best performance for
>>> one process.
>>>
>>> For more background I suggest you watch the following conference talks.
>>>
>>> [image: maxresdefault.jpg]
>>>
>>> Secrets of a WSGI master. <https://www.youtube.com/watch?v=H6Q3l11fjU0>
>>> youtube.com <https://www.youtube.com/watch?v=H6Q3l11fjU0>
>>> <https://www.youtube.com/watch?v=H6Q3l11fjU0>
>>>
>>> [image: maxresdefault.jpg]
>>>
>>> Using benchmarks to understand how WSGI servers work. by Graham Dumpleton
>>> <https://www.youtube.com/watch?v=SGleKfigMsk>
>>> youtube.com <https://www.youtube.com/watch?v=SGleKfigMsk>
>>> <https://www.youtube.com/watch?v=SGleKfigMsk>
>>>
>>> [image: hqdefault.jpg]
>>>
>>> Making Apache suck less for hosting Python web applications.
>>> <https://www.youtube.com/watch?v=k6Erh7oHvns>
>>> youtube.com <https://www.youtube.com/watch?v=k6Erh7oHvns>
>>> <https://www.youtube.com/watch?v=k6Erh7oHvns>
>>>
>>> As explained in the videos, even if all request threads in a daemon
>>> process are occupied, then requests will queue up within the context of the
>>> Apache worker process which proxy to the mod_wsgi daemon processes. The MPM
>>> settings control those worker processes, and is typical for those to have
>>> higher capacity for concurrent requests, thus allowing queueing up of
>>> requests. There can also be a backlog of requests connecting to Apache as
>>> well. These topics are described in the videos.
>>>
>>> Graham
>>>
>>> On 1 Aug 2024, at 4:56 PM, RajKumar Ambadipelli <[email protected]>
>>> wrote:
>>>
>>> If we don't mention options like no.of process and no.of threads in
>>> WSGIDaemonProcess directive by default it will consider 1 process with 15
>>> threads in mpm settings as event prefork right.
>>> Does the above configuration helps in serving 15 request concurrently.
>>> If so, then what happens when there are more no.of concurrent requests hit
>>> our web application.
>>> Does 15 threads means it serves 15 requests concurrently.
>>>
>>> RajKumar
>>>
>>> On Wednesday 31 July 2024 at 12:47:09 UTC+5:30 RajKumar Ambadipelli
>>> wrote:
>>>
>>>> Thankyou for clarifying.
>>>>
>>>> RajKumar
>>>>
>>>> On Wednesday 31 July 2024 at 11:56:48 UTC+5:30 Graham Dumpleton wrote:
>>>>
>>>>> If you define a daemon process group, the number of processes defined
>>>>> for the group will always be started and running.
>>>>>
>>>>> With the way you have configured things your Python web application
>>>>> code is only loaded lazily by a process in a daemon process group when
>>>>> the
>>>>> first request arrives which is to be handled by that process.
>>>>>
>>>>> Thus, prior to any request being received, the memory footprint of the
>>>>> processes should be similar to that of running an empty Python
>>>>> interpreter.
>>>>>
>>>>> If your web applications are infrequently accessed and you want to
>>>>> minimise memory usage, then add to WSGIDaemonProcess the option:
>>>>>
>>>>> inactivity-timeout=30
>>>>>
>>>>> See
>>>>> https://modwsgi.readthedocs.io/en/master/configuration-directives/WSGIDaemonProcess.html
>>>>> for
>>>>> details, but basically what it means is that the process will be
>>>>> restarted
>>>>> when idle and will revert memory usage by the process back to the base
>>>>> level.
>>>>>
>>>>> Do note however that if you Python web application takes a long time
>>>>> to load, then this may be noticeable to users if the Python web
>>>>> application
>>>>> code is going to have to be reloaded frequently.
>>>>>
>>>>> As to CPU usage, the process if not handling requests will be waiting
>>>>> on the socket on which requests are listening, so it should not be using
>>>>> any CPU at that time.
>>>>>
>>>>> There are other options to WSGIDaemonProcess you could play with to
>>>>> recycle the process periodically, but what might be appropriate really
>>>>> depends on your specific web application so I can't give concrete
>>>>> suggestions of what to use.
>>>>>
>>>>> Graham
>>>>>
>>>>> On 31 Jul 2024, at 2:55 PM, RajKumar Ambadipelli <[email protected]>
>>>>> wrote:
>>>>>
>>>>> What exactly I want is I want to know WSGIDaemonProcess which are
>>>>> ideal not receiving any requests and not serving response but only
>>>>> declared, How does this WSGIDaemonProcess effect my resources like memory
>>>>> and cpu.
>>>>>
>>>>> On Wednesday 31 July 2024 at 10:22:23 UTC+5:30 RajKumar Ambadipelli
>>>>> wrote:
>>>>>
>>>>>> Creating multiple virtualhost with different mod_wsgi daemons I meant
>>>>>> 'WSGIDaemonProcess'
>>>>>> and not using it that is it will not server and requests but only
>>>>>> declared does this effect my resources like memory and CPU.
>>>>>> On Monday 29 July 2024 at 12:45:21 UTC+5:30 Graham Dumpleton wrote:
>>>>>>
>>>>>>> Comes down to how much memory and CPU your machine has, plus how
>>>>>>> much traffic the sites get. So will depend and you will just have to
>>>>>>> see
>>>>>>> how it goes.
>>>>>>>
>>>>>>> On 29 Jul 2024, at 5:12 PM, RajKumar Ambadipelli <[email protected]>
>>>>>>> wrote:
>>>>>>>
>>>>>>> Yeah it is working fine what I did was
>>>>>>>
>>>>>>> step1. Unlinked existing symlink
>>>>>>> Step2. Create new symlink
>>>>>>> Step3. Managed permissions and shell context of files
>>>>>>>
>>>>>>> Therefore no
>>>>>>> reload or restart is needed.
>>>>>>>
>>>>>>> But I have doubt up to how many mod_wsgi daemons we can efficiently
>>>>>>> without any disturbance and up to what extent we can trust this
>>>>>>> deployment
>>>>>>> process using mod_wsgi in daemon mode for production environment.
>>>>>>>
>>>>>>> Thankyou,
>>>>>>> RajKumar
>>>>>>> On Thursday 25 July 2024 at 13:04:18 UTC+5:30 RajKumar Ambadipelli
>>>>>>> wrote:
>>>>>>>
>>>>>>>> Sorry that uoadmin is actually admin.
>>>>>>>>
>>>>>>>> Ok I will try this one.
>>>>>>>>
>>>>>>>> Thankyou,
>>>>>>>> RajKumar
>>>>>>>>
>>>>>>>> On Thursday 25 July 2024 at 12:59:13 UTC+5:30 Graham Dumpleton
>>>>>>>> wrote:
>>>>>>>>
>>>>>>>>> You have two different directories which may complicate it a
>>>>>>>>> little, but what you can do is have something like:
>>>>>>>>>
>>>>>>>>> Listen 9002 <VirtualHost *:9002>
>>>>>>>>> ServerName test.myapp.com
>>>>>>>>> ErrorLog /var/log/webservice_error.log
>>>>>>>>> WSGIPassAuthorization On
>>>>>>>>> WSGIDaemonProcess Tes9002
>>>>>>>>> python-path=/home/uoadmin/releases/test/students:/home/admin/releases/test/shared
>>>>>>>>>
>>>>>>>>> display-name=%{GROUP}
>>>>>>>>> WSGIProcessGroup Tes9002 WSGIApplicationGroup %{GLOBAL}
>>>>>>>>> WSGIScriptAlias / /home/admin/releases/test/students/conf/wsgi.py
>>>>>>>>> <Directory /home/admin/releases/test/students/conf>
>>>>>>>>> <Files wsgi.py> Require all granted </Files>
>>>>>>>>> </Directory>
>>>>>>>>> </VirtualHost>
>>>>>>>>>
>>>>>>>>> <VirtualHost *:9002>
>>>>>>>>> ServerName dev.myapp.com
>>>>>>>>> ErrorLog /var/log/webservice_error.log
>>>>>>>>> WSGIPassAuthorization On
>>>>>>>>> WSGIDaemonProcess Dev9002
>>>>>>>>> python-path=/home/uoadmin/releases/dev/students:/home/admin/releases/dev/shared
>>>>>>>>>
>>>>>>>>> display-name=%{GROUP}
>>>>>>>>> WSGIProcessGroup Dev9002 WSGIApplicationGroup %{GLOBAL}
>>>>>>>>> WSGIScriptAlias / /home/admin/releases/dev/students/conf/wsgi.py
>>>>>>>>> <Directory /home/admin/releases/dev/students/conf>
>>>>>>>>> <Files wsgi.py> Require all granted </Files>
>>>>>>>>> </Directory>
>>>>>>>>> </VirtualHost>
>>>>>>>>>
>>>>>>>>> In this case /home/admin/releases/dev would actually be a symlink
>>>>>>>>> to the versioned directory.
>>>>>>>>>
>>>>>>>>> Not sure why have separate uoadmin directory, but also have
>>>>>>>>> /home/uoadmin/releases/dev as symlink to the versioned directory.
>>>>>>>>>
>>>>>>>>> To change what is used, remove/recreate symlinks so point to the
>>>>>>>>> directory for the new version.
>>>>>>>>>
>>>>>>>>> That the wsgi.py has changed should trigger a process restart if
>>>>>>>>> auto reloading is on (default).
>>>>>>>>>
>>>>>>>>> Alternatively could disable auto reloading and manually send
>>>>>>>>> SIGUSR1 to process to trigger a graceful reload after changing the
>>>>>>>>> symlink.
>>>>>>>>>
>>>>>>>>> That all said, I can't remember if you might have to configure
>>>>>>>>> Apache to tell it to allow following symlinks (Options
>>>>>>>>> FollowSymLinks). If it were static file handling would definitely be
>>>>>>>>> needed, but can't remember if would be required in this case where is
>>>>>>>>> WSGI
>>>>>>>>> application handling things.
>>>>>>>>>
>>>>>>>>> Graham
>>>>>>>>>
>>>>>>>>> On 25 Jul 2024, at 5:21 PM, RajKumar Ambadipelli <arkki...@
>>>>>>>>> gmail.com> wrote:
>>>>>>>>>
>>>>>>>>> Ok, If I have only two virtualhosts all the time and I am going to
>>>>>>>>> change only python-path will that work with the direct signal using
>>>>>>>>> SIGUSR1.
>>>>>>>>>
>>>>>>>>> If the above is possible then I think I have some kind of solution.
>>>>>>>>>
>>>>>>>>> Thankyou,
>>>>>>>>> RajKumar
>>>>>>>>>
>>>>>>>>> On Thursday 25 July 2024 at 12:35:09 UTC+5:30 Graham Dumpleton
>>>>>>>>> wrote:
>>>>>>>>>
>>>>>>>>>> Are you always using the same two virtual host server names and
>>>>>>>>>> just updating the version number in the paths?
>>>>>>>>>>
>>>>>>>>>> On 25 Jul 2024, at 4:21 PM, RajKumar Ambadipelli <arkki...@
>>>>>>>>>> gmail.com> wrote:
>>>>>>>>>>
>>>>>>>>>> Yes I am adding new virtual hosts when ever I want to release a
>>>>>>>>>> new version of that services lets say initially my virtualhost
>>>>>>>>>> config will
>>>>>>>>>> be like
>>>>>>>>>>
>>>>>>>>>> #Students Webservice Config
>>>>>>>>>> Listen 9002 <VirtualHost *:9002>
>>>>>>>>>> ServerName test.myapp.com
>>>>>>>>>> ErrorLog /var/log/webservice_error.log
>>>>>>>>>> WSGIPassAuthorization On
>>>>>>>>>> WSGIDaemonProcess Tes9002 python-path=/home/uoadmin/releases/1.0
>>>>>>>>>> .0/students:/home/admin/releases/1.0.0/shared
>>>>>>>>>> display-name=%{GROUP}
>>>>>>>>>> WSGIProcessGroup Tes9002 WSGIApplicationGroup %{GLOBAL}
>>>>>>>>>> WSGIScriptAlias / /home/admin/releases/1.0.0
>>>>>>>>>> /students/conf/wsgi.py
>>>>>>>>>> <Directory /home/admin/releases/1.0.0/students/conf>
>>>>>>>>>> <Files wsgi.py> Require all granted </Files>
>>>>>>>>>> </Directory>
>>>>>>>>>> </VirtualHost>
>>>>>>>>>>
>>>>>>>>>> When i want to go for new releases the down part is appended to
>>>>>>>>>> above part
>>>>>>>>>>
>>>>>>>>>> <VirtualHost *:9002>
>>>>>>>>>> ServerName dev.myapp.com
>>>>>>>>>> ErrorLog /var/log/webservice_error.log
>>>>>>>>>> WSGIPassAuthorization On
>>>>>>>>>> WSGIDaemonProcess Dev9002 python- path=/home/uoadmin/releases/
>>>>>>>>>> 1.1.0/students:/home/admin/releases/1.1.0/shared
>>>>>>>>>> display-name=%{GROUP}
>>>>>>>>>> WSGIProcessGroup Dev9002 WSGIApplicationGroup %{GLOBAL}
>>>>>>>>>> WSGIScriptAlias / /home/admin/releases/1.1.0
>>>>>>>>>> /students/conf/wsgi.py
>>>>>>>>>> <Directory /home/admin/releases/1.1.0/students/conf>
>>>>>>>>>> <Files wsgi.py> Require all granted </Files>
>>>>>>>>>> </Directory>
>>>>>>>>>> </VirtualHost>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> Now I am going to have two virtualhosts with two daemons 1st is
>>>>>>>>>> already recognized by apache server where as second one is not yet
>>>>>>>>>> recognized by apache server
>>>>>>>>>>
>>>>>>>>>> Thankyou,
>>>>>>>>>> RajKumar
>>>>>>>>>>
>>>>>>>>>> On Thursday 25 July 2024 at 11:40:31 UTC+5:30 Graham Dumpleton
>>>>>>>>>> wrote:
>>>>>>>>>>
>>>>>>>>>>> What is the reason for doing the graceful restart? Is it because
>>>>>>>>>>> you are adding/removing virtual hosts, or making some other Apache
>>>>>>>>>>> config
>>>>>>>>>>> change.
>>>>>>>>>>>
>>>>>>>>>>> You do not need to do a complete Apache restart if just want to
>>>>>>>>>>> force a daemon process to restart, you can instead send the
>>>>>>>>>>> processes a
>>>>>>>>>>> signal directly. From memory it is SIGUSR1 that triggers a graceful
>>>>>>>>>>> restart
>>>>>>>>>>> of processes, but you will need to confirm that.
>>>>>>>>>>>
>>>>>>>>>>> On 25 Jul 2024, at 3:28 PM, RajKumar Ambadipelli <arkki...@
>>>>>>>>>>> gmail.com> wrote:
>>>>>>>>>>>
>>>>>>>>>>> When i have 260 microservices those all are light weight
>>>>>>>>>>> applications using same python interpreter and with django rest api
>>>>>>>>>>> framework, and currently each application hosted on apache server
>>>>>>>>>>> usign
>>>>>>>>>>> mod_wsgi daemon mode and my main problem is while making changes to
>>>>>>>>>>> one of
>>>>>>>>>>> application virtualhost other ongoing daemons are distured as i
>>>>>>>>>>> need to
>>>>>>>>>>> reload or restart.
>>>>>>>>>>> All those 260 services very light weight each listen to http
>>>>>>>>>>> request on unique ports.
>>>>>>>>>>>
>>>>>>>>>>> ThankYou
>>>>>>>>>>> RajKumar
>>>>>>>>>>>
>>>>>>>>>>> On Tuesday 23 July 2024 at 16:37:42 UTC+5:30 Graham Dumpleton
>>>>>>>>>>> wrote:
>>>>>>>>>>>
>>>>>>>>>>>> One can optimise embedded mode for better performance, but I
>>>>>>>>>>>> would put a big caveat on that and say is only probably a good
>>>>>>>>>>>> idea to
>>>>>>>>>>>> tackle if you have the one web service.
>>>>>>>>>>>>
>>>>>>>>>>>> Running 260 micro services in one Apache httpd instance with
>>>>>>>>>>>> mod_wsgi sounds rather scary either way.
>>>>>>>>>>>>
>>>>>>>>>>>> If you use mod_wsgi daemon mode where each micro service is in
>>>>>>>>>>>> its own daemon process group (with a single process and small
>>>>>>>>>>>> number of
>>>>>>>>>>>> threads), then you might get away with it if these aren't high
>>>>>>>>>>>> volume
>>>>>>>>>>>> sites. That said, it is still a lot of managed daemon mode
>>>>>>>>>>>> processes and
>>>>>>>>>>>> not sure how well Apache will handle that, especially on restarts.
>>>>>>>>>>>>
>>>>>>>>>>>> Running them all in embedded mode would be a bad idea if each
>>>>>>>>>>>> needs a separate Python interpreter context because the Apache
>>>>>>>>>>>> worker
>>>>>>>>>>>> process would be huge in size. If Apache httpd was configured for
>>>>>>>>>>>> prefork
>>>>>>>>>>>> MPM it would be even worse because you would have a potentially
>>>>>>>>>>>> large
>>>>>>>>>>>> number of worker processes since all are single thread. You also
>>>>>>>>>>>> run a big
>>>>>>>>>>>> risk with micro services interfering with each other in strange
>>>>>>>>>>>> ways if
>>>>>>>>>>>> running in different sub interpreter contexts of the one process
>>>>>>>>>>>> due to how
>>>>>>>>>>>> Python imports C extensions, and process wide environment
>>>>>>>>>>>> variables work.
>>>>>>>>>>>> Various third party Python packages with C extensions will not
>>>>>>>>>>>> even work in
>>>>>>>>>>>> Python sub interpreters (eg., anything related to numpy).
>>>>>>>>>>>>
>>>>>>>>>>>> You definitely want event or worker MPM, but even then, for 260
>>>>>>>>>>>> micro services, if they need separate Python interpreter context I
>>>>>>>>>>>> can't
>>>>>>>>>>>> really recommend it still because of size concerns for processes
>>>>>>>>>>>> and
>>>>>>>>>>>> potential cross sub interpreter interference.
>>>>>>>>>>>>
>>>>>>>>>>>> So the question is whether when you said 260 micro services you
>>>>>>>>>>>> really mean independent web applications, or whether you just mean
>>>>>>>>>>>> you have
>>>>>>>>>>>> 260 different unique HTTP handlers as part of the one application,
>>>>>>>>>>>> and thus
>>>>>>>>>>>> in the same Python interpreter context.
>>>>>>>>>>>>
>>>>>>>>>>>> When people talk about such large number of micro services,
>>>>>>>>>>>> usually you would not be aiming to host them in a single Apache
>>>>>>>>>>>> instance
>>>>>>>>>>>> but would instead be looking at running something which can handle
>>>>>>>>>>>> things
>>>>>>>>>>>> at scale like Kubernetes and creating separate deployments for
>>>>>>>>>>>> them in
>>>>>>>>>>>> that, relying on the ingress routing Kubernetes provides to get
>>>>>>>>>>>> traffic to
>>>>>>>>>>>> the appropriate micro service.
>>>>>>>>>>>>
>>>>>>>>>>>> Graham
>>>>>>>>>>>>
>>>>>>>>>>>> On 23 Jul 2024, at 7:13 PM, RajKumar Ambadipelli <arkki...@
>>>>>>>>>>>> gmail.com> wrote:
>>>>>>>>>>>>
>>>>>>>>>>>> mod_wsgi in embeded mode allows graceful restart,
>>>>>>>>>>>> What are the potential issues that I will face if I use
>>>>>>>>>>>> mod_wsgi in embedded mode instead of daemon mode,
>>>>>>>>>>>> I have to host around 260 python micro services.
>>>>>>>>>>>>
>>>>>>>>>>>> I have saw your blog on 'why are you using mod_wsgi in embedded
>>>>>>>>>>>> mode?' But, I unable to understand it very well in that you
>>>>>>>>>>>> mentioned if we
>>>>>>>>>>>> configure mpm settings correctly then mod_wsgi in embedded mode is
>>>>>>>>>>>> better
>>>>>>>>>>>> than daemon mode but not mentioned any configurations.
>>>>>>>>>>>>
>>>>>>>>>>>> Thanking you,
>>>>>>>>>>>> RajKumar
>>>>>>>>>>>>
>>>>>>>>>>>> On Tuesday 23 July 2024 at 13:04:50 UTC+5:30 Graham Dumpleton
>>>>>>>>>>>> wrote:
>>>>>>>>>>>>
>>>>>>>>>>>>> On 23 Jul 2024, at 4:09 PM, RajKumar Ambadipelli <arkki...@
>>>>>>>>>>>>> gmail.com> wrote:
>>>>>>>>>>>>>
>>>>>>>>>>>>> I am using Apache Server with mod_wsgi for hosting my python
>>>>>>>>>>>>> django applications. Versions: Python 3.9.18 Server version:
>>>>>>>>>>>>> Apache/2.4.57
>>>>>>>>>>>>> mod-wsgi==4.7.1
>>>>>>>>>>>>>
>>>>>>>>>>>>> One of my application virtual host configuration with two
>>>>>>>>>>>>> different versions:
>>>>>>>>>>>>>
>>>>>>>>>>>>> ...
>>>>>>>>>>>>>
>>>>>>>>>>>>> So, When the source code is modified I can referesh the wsgi
>>>>>>>>>>>>> daemon using touch
>>>>>>>>>>>>> /home/uoadmin/releases/1.1.0/students/conf/wsgi.py touch
>>>>>>>>>>>>> /home/uoadmin/releases/1.0.0/students/conf/wsgi.py But when I
>>>>>>>>>>>>> added new
>>>>>>>>>>>>> virtualhost to the above configuration file or else when I modify
>>>>>>>>>>>>> above
>>>>>>>>>>>>> file the apache server unable to recognize modifications made the
>>>>>>>>>>>>> existing
>>>>>>>>>>>>> virtualhost or newly added virtualhost until doing apachectl
>>>>>>>>>>>>> graceful (or)
>>>>>>>>>>>>> apachectl restart (or) systemctl reload httpd but all the
>>>>>>>>>>>>> commands above
>>>>>>>>>>>>> killing the ongoing requests forcefully directly terminating them.
>>>>>>>>>>>>>
>>>>>>>>>>>>> How to handle above situation.
>>>>>>>>>>>>>
>>>>>>>>>>>>> I want to know how will apache server recognize modifications
>>>>>>>>>>>>> to virtualhost or newly added virtual host without reloading or
>>>>>>>>>>>>> restarting.
>>>>>>>>>>>>>
>>>>>>>>>>>>> It can't, Apache httpd requires you to perform a restart
>>>>>>>>>>>>> (reload) in order to read changes to the Apache configuration
>>>>>>>>>>>>> files. That
>>>>>>>>>>>>> is how it works.
>>>>>>>>>>>>>
>>>>>>>>>>>>> If above is not possible then is there anyway for restarting
>>>>>>>>>>>>> or reloading apache server gracefully that is without terminating
>>>>>>>>>>>>> or
>>>>>>>>>>>>> killing other ongoing requests or daemons while using apache
>>>>>>>>>>>>> server +
>>>>>>>>>>>>> mod_wsgi for serving python with django?
>>>>>>>>>>>>>
>>>>>>>>>>>>> Unfortunately not. The way Apache httpd manages the mod_wsgi
>>>>>>>>>>>>> daemon processes it will force a restart of those as well and
>>>>>>>>>>>>> even though
>>>>>>>>>>>>> Apache has a concept of graceful restart for it's own worker
>>>>>>>>>>>>> child
>>>>>>>>>>>>> processes, it doesn't extend that to managed process like the
>>>>>>>>>>>>> mod_wsgi
>>>>>>>>>>>>> daemon process and always restarts them immediately even when it
>>>>>>>>>>>>> is a
>>>>>>>>>>>>> graceful restart. There is nothing that can be done about this.
>>>>>>>>>>>>>
>>>>>>>>>>>>> The only way you could handle it if you need to be able to
>>>>>>>>>>>>> freely restart the main Apache server and have it not affect your
>>>>>>>>>>>>> Python
>>>>>>>>>>>>> web applications, is to run the Python web applications in
>>>>>>>>>>>>> distinct
>>>>>>>>>>>>> secondary web server processes and use the main Apache server to
>>>>>>>>>>>>> only proxy
>>>>>>>>>>>>> requests through to the secondary web servers.
>>>>>>>>>>>>>
>>>>>>>>>>>>> For the second web servers you could use mod_wsgi-express to
>>>>>>>>>>>>> make things easier, but you could also just not use mod_wsgi for
>>>>>>>>>>>>> the
>>>>>>>>>>>>> secondary web servers and use gunicorn or some other standalone
>>>>>>>>>>>>> Python
>>>>>>>>>>>>> WSGI/asyncio web server.
>>>>>>>>>>>>>
>>>>>>>>>>>>> Graham
>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>> --
>>>>>>>>>>>> You received this message because you are subscribed to the
>>>>>>>>>>>> Google Groups "modwsgi" group.
>>>>>>>>>>>> To unsubscribe from this group and stop receiving emails from
>>>>>>>>>>>> it, send an email to [email protected].
>>>>>>>>>>>> To view this discussion on the web visit
>>>>>>>>>>>> https://groups.google.com/d/msgid/modwsgi/d28663bc-a143-4e4f-949d-38e065c5ac9fn%40googlegroups.com
>>>>>>>>>>>>
>>>>>>>>>>>> <https://groups.google.com/d/msgid/modwsgi/d28663bc-a143-4e4f-949d-38e065c5ac9fn%40googlegroups.com?utm_medium=email&utm_source=footer>
>>>>>>>>>>>> .
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>> --
>>>>>>>>>>> You received this message because you are subscribed to the
>>>>>>>>>>> Google Groups "modwsgi" group.
>>>>>>>>>>> To unsubscribe from this group and stop receiving emails from
>>>>>>>>>>> it, send an email to [email protected].
>>>>>>>>>>>
>>>>>>>>>>> To view this discussion on the web visit
>>>>>>>>>>> https://groups.google.com/d/msgid/modwsgi/1fffb2f7-ed8a-4d88-a52b-00e7e82e98d5n%40googlegroups.com
>>>>>>>>>>>
>>>>>>>>>>> <https://groups.google.com/d/msgid/modwsgi/1fffb2f7-ed8a-4d88-a52b-00e7e82e98d5n%40googlegroups.com?utm_medium=email&utm_source=footer>
>>>>>>>>>>> .
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>> --
>>>>>>>>>> You received this message because you are subscribed to the
>>>>>>>>>> Google Groups "modwsgi" group.
>>>>>>>>>> To unsubscribe from this group and stop receiving emails from it,
>>>>>>>>>> send an email to [email protected].
>>>>>>>>>>
>>>>>>>>>> To view this discussion on the web visit
>>>>>>>>>> https://groups.google.com/d/msgid/modwsgi/27697b57-c903-4881-bddd-691060d62b47n%40googlegroups.com
>>>>>>>>>>
>>>>>>>>>> <https://groups.google.com/d/msgid/modwsgi/27697b57-c903-4881-bddd-691060d62b47n%40googlegroups.com?utm_medium=email&utm_source=footer>
>>>>>>>>>> .
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>> --
>>>>>>>>> You received this message because you are subscribed to the Google
>>>>>>>>> Groups "modwsgi" group.
>>>>>>>>> To unsubscribe from this group and stop receiving emails from it,
>>>>>>>>> send an email to [email protected].
>>>>>>>>>
>>>>>>>>> To view this discussion on the web visit
>>>>>>>>> https://groups.google.com/d/msgid/modwsgi/0794a799-7f70-4d68-affe-b2b7a4f43529n%40googlegroups.com
>>>>>>>>>
>>>>>>>>> <https://groups.google.com/d/msgid/modwsgi/0794a799-7f70-4d68-affe-b2b7a4f43529n%40googlegroups.com?utm_medium=email&utm_source=footer>
>>>>>>>>> .
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>> --
>>>>>>> You received this message because you are subscribed to the Google
>>>>>>> Groups "modwsgi" group.
>>>>>>> To unsubscribe from this group and stop receiving emails from it,
>>>>>>> send an email to [email protected].
>>>>>>>
>>>>>>> To view this discussion on the web visit
>>>>>>> https://groups.google.com/d/msgid/modwsgi/7edb7907-915b-41a6-a581-097ea1b87dc0n%40googlegroups.com
>>>>>>>
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>>>>>>> .
>>>>>>>
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