This is an almost empty Django project, initialize by following the Django tutorial.
The relevant code is in test/views.py, the only thing that is done is:
Build the containers:
- Unit:
sudo docker build -f Dockerfiles.unit -t django:unit . - Gunicorn:
sudo docker build -f Dockerfiles.gunicorn -t django:gunicorn .
Related to issue : nginx/unit#868
Run the containers: sudo docker run -it --rm -p 8000:8000 django:unit
In another terminal, I use curl to do a requests:
romain@grace-hopper:~ » curl --header "ASCIITEST: 1" http://localhost:8000/test/
Hello, HTTP_ASCIITEST is ascii? False
We see that the value of request.META.get("HTTP_DNT") is not ascii.
Run the container: sudo docker run -it --rm -p 8000:8000 django:gunicorn
In another terminal, I use curl to do a requests:
romain@grace-hopper:~ » curl --header "ASCIITEST: 1" http://localhost:8000/test/
Hello, HTTP_ASCIITEST is ascii? True
We see that the value of request.META.get("HTTP_DNT") is ascii.
Run the containers: sudo docker run -it --rm -p 8000:8000 --name django_unit django:unit
In another terminal, I use curl to do a requests: romain@grace-hopper:~ » curl http://localhost:8000/test/timeout
In another terminal, I use docker to ask a graceful shutdown before the end of the processing: sudo docker stop -t 60 -s 15 django_unit
What I see:
In the curl output, we have an error with and empty reply just after the launch of the docker stop command:
romain@grace-hopper:~ curl http://localhost:8000/test/timeout
curl: (52) Empty reply from serve
In the container output, we see two processes killed just after the docker stop command, but the processing continue.
At the end the process can't respond to the client because the socket is gone, I guess.
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2023/05/11 14:29:09 [notice] 1#1 process 44 exited with code 0
2023/05/11 14:29:09 [notice] 1#1 process 45 exited with code 0
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2023/05/11 14:29:23 [warn] 47#47 [unit] sendmsg(11, 311) failed: Broken pipe (32)
2023/05/11 14:29:23 [notice] 46#46 app process 47 exited with code 0
2023/05/11 14:29:23 [alert] 46#46 sendmsg(13, -1, -1, 2) failed (32: Broken pipe)
2023/05/11 14:29:23 [notice] 1#1 process 46 exited with code 0
Run the containers: sudo docker run -it --rm -p 8000:8000 --name django_gunicorn django:gunicorn
In another terminal, I use curl to do a requests: romain@grace-hopper:~ » curl http://localhost:8000/test/timeout
In another terminal, I use docker to ask a graceful shutdown before the end of the processing: sudo docker stop -t 60 -s 15 django_gunicorn
What I see: In the curl output, everything is normal:
romain@grace-hopper:~ curl http://localhost:8000/test/timeout
Graceful shutdown.
In the container output, we see a log to inform us that the term signal is handle, the process continue, and the answer to the client is correctly sent to the client and then the gunicorn successfuly exited
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[2023-05-11 14:35:37 +0000] [1] [INFO] Handling signal: term
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[2023-05-11 14:35:55 +0000] [7] [INFO] Worker exiting (pid: 7)
[2023-05-11 14:35:55 +0000] [1] [INFO] Shutting down: Master