Permission Denied when attempting to start Daphne systemctl process - django

Question

I'm deploying a website using Django and Django-Channels, with Channel's daphne ASGI server substituting for the typical Gunicorn WSGI setup. Using this Gunicorn WSGI tutorial as a jumping off guide, I attempted to write a systemctl service for my daphne server, when I hit the below error:
CRITICAL Listen failure: [Errno 13] Permission denied: '27646' -> b'/run/daphne.sock.lock'
I was unfortunately unable to find any answers to why permissions would be denied to the .sock file, (in context to Daphne) so I was hoping I could get some hints on where to begin debugging this problem. Below are my daphne.socket and my daphne.service files.
daphne.service
[Unit]
Description=daphne daemon
Requires=daphne.socket
After=network.target
[Service]
User=brianl
Group=www-data
WorkingDirectory=/home/brianl/autoXMD
ExecStart=/home/brianl/autoXMD/env/bin/daphne -u /run/daphne.sock -b 0.0.0.0 -p 8000 autoXMD.asgi:application
[Install]
WantedBy=multi-user.target
daphne.socket
[Unit]
Description=daphne socket
[Socket]
ListenStream=/run/daphne.sock
[Install]
WantedBy=sockets.target
Based off the linked DigitalOcean tutorial, I start my service with sudo systemctl start daphne.socket.
My guess is that there's some kind of discrepancy between setting up systemctl services for Gunicorn and Daphne that I missed, but I don't know for sure.
(If it helps, I'm planning on using Nginx as the main server, but I haven't reached that point yet)
EDIT:
It would help if I also attached the full output systemd gives:
● daphne.service - daphne daemon
Loaded: loaded (/etc/systemd/system/daphne.service; enabled; vendor preset: enabled)
Active: failed (Result: start-limit-hit) since Thu 2019-09-05 22:00:43 UTC; 1min 51s ago
Process: 22041 ExecStart=/home/brianl/autoXMD/env/bin/daphne -u /run/daphne.sock -b 0.0.0.0 -p 8000 autoXMD.asgi:application (code=exited, status=0/SUCCESS)
Main PID: 22041 (code=exited, status=0/SUCCESS)
Sep 05 22:00:43 autoxmd daphne[22041]: warnings.warn('%s. joblib will operate in serial mode' % (e,))
Sep 05 22:00:43 autoxmd daphne[22041]: 2019-09-05 22:00:43,013 INFO Starting server at tcp:port=8000:interface=0.0.0.0, unix:/run/daphne.sock
Sep 05 22:00:43 autoxmd daphne[22041]: 2019-09-05 22:00:43,017 INFO HTTP/2 support not enabled (install the http2 and tls Twisted extras)
Sep 05 22:00:43 autoxmd daphne[22041]: 2019-09-05 22:00:43,020 INFO Configuring endpoint tcp:port=8000:interface=0.0.0.0
Sep 05 22:00:43 autoxmd daphne[22041]: 2019-09-05 22:00:43,022 INFO Listening on TCP address 0.0.0.0:8000
Sep 05 22:00:43 autoxmd daphne[22041]: 2019-09-05 22:00:43,022 INFO Configuring endpoint unix:/run/daphne.sock
Sep 05 22:00:43 autoxmd daphne[22041]: 2019-09-05 22:00:43,022 CRITICAL Listen failure: [Errno 13] Permission denied: '22041' -> b'/run/daphne.sock.lock'
Sep 05 22:00:43 autoxmd systemd[1]: daphne.service: Start request repeated too quickly.
Sep 05 22:00:43 autoxmd systemd[1]: daphne.service: Failed with result 'start-limit-hit'.
Sep 05 22:00:43 autoxmd systemd[1]: Failed to start daphne daemon.

Answer 1

I think this occurred for the permission issue. By default /run directory is owned by root. So the daphne socket failed to create the daphne.sock.lock file in /run directory.
The solution is that create a folder in /run directory and give permission to your user and group.
For example:
sudo mkdir /run/daphne
sudo chown brianl:www-data /run/daphne
Now change the Unix sock path in the service & socket file.
daphne.service
[Unit]
Description=daphne daemon
Requires=daphne.socket
After=network.target
[Service]
User=brianl
Group=www-data
WorkingDirectory=/home/brianl/autoXMD
ExecStart=/home/brianl/autoXMD/env/bin/daphne -u /run/daphne/daphne.sock -b 0.0.0.0 -p 8000 autoXMD.asgi:application
[Install]
WantedBy=multi-user.target
daphne.socket
[Unit]
Description=daphne socket
[Socket]
ListenStream=/run/daphne/daphne.sock
[Install]
WantedBy=sockets.target
Hopefully, this works for you. For further you can go through a similar issue MySQL Daemon Lock issue