Problems during install testing - HTTP: failed to make connection to backend

[Sean Scarfo]

Hey everyone,  

I'm new(ish) to linux, but can follow directions, tail a log, and have been using ubuntu server on and off for the past few years.  Trying to install netbox, and 'seemed' to be able to follow instructions all the way through. 

However when I test of course it fails.   

Getting error 503 in browswer

Service Unavailable

The server is temporarily unable to service your request due to maintenance downtime or capacity problems. Please try again later.

Apache/2.4.18 (Ubuntu) Server at 192.168.20.8 Port 8081

[Mon Nov 13 18:12:03.558979 2017] [proxy:error] [pid 1870] (111)Connection refused: AH00957: HTTP: attempt to connect to 127.0.0.1:8001 (127.0.0.1) failed
[Mon Nov 13 18:12:03.559163 2017] [proxy:error] [pid 1870] AH00959: ap_proxy_connect_backend disabling worker for (127.0.0.1) for 60s
[Mon Nov 13 18:12:03.559224 2017] [proxy_http:error] [pid 1870] [client 192.168.20.59:59932] AH01114: HTTP: failed to make connection to backend: 127.0.0.1
[Mon Nov 13 18:12:03.675474 2017] [proxy:error] [pid 1873] (111)Connection refused: AH00957: HTTP: attempt to connect to 127.0.0.1:8001 (127.0.0.1) failed
[Mon Nov 13 18:12:03.675593 2017] [proxy:error] [pid 1873] AH00959: ap_proxy_connect_backend disabling worker for (127.0.0.1) for 60s
[Mon Nov 13 18:12:03.675642 2017] [proxy_http:error] [pid 1873] [client 192.168.20.59:59933] AH01114: HTTP: failed to make connection to backend: 127.0.0.1, referer: http://192.168.20.8:8081/

I've verified that SELinux is not installed.   

I've verified that PIP and django are installed as well as gunicorn, wsgi, and supervisor.  

Trying to find the cause, I tried running gunicorn manually, and I got these errors. 

 sudo gunicorn -c /opt/netbox/gunicorn_config.py netbox.wsgi
[2017-11-13 18:16:53 -0500] [1973] [INFO] Starting gunicorn 19.7.1
[2017-11-13 18:16:53 -0500] [1973] [INFO] Listening at: http://127.0.0.1:8001 (1973)
[2017-11-13 18:16:53 -0500] [1973] [INFO] Using worker: sync
[2017-11-13 18:16:53 -0500] [1976] [INFO] Booting worker with pid: 1976
[2017-11-13 18:16:53 -0500] [1976] [ERROR] Exception in worker process
Traceback (most recent call last):
  File "/usr/local/lib/python3.5/dist-packages/gunicorn/arbiter.py", line 578, in spawn_worker
    worker.init_process()
  File "/usr/local/lib/python3.5/dist-packages/gunicorn/workers/base.py", line 126, in init_process
    self.load_wsgi()
  File "/usr/local/lib/python3.5/dist-packages/gunicorn/workers/base.py", line 135, in load_wsgi
    self.wsgi = self.app.wsgi()
  File "/usr/local/lib/python3.5/dist-packages/gunicorn/app/base.py", line 67, in wsgi
    self.callable = self.load()
  File "/usr/local/lib/python3.5/dist-packages/gunicorn/app/wsgiapp.py", line 65, in load
    return self.load_wsgiapp()
  File "/usr/local/lib/python3.5/dist-packages/gunicorn/app/wsgiapp.py", line 52, in load_wsgiapp
    return util.import_app(self.app_uri)
  File "/usr/local/lib/python3.5/dist-packages/gunicorn/util.py", line 352, in import_app
    __import__(module)
  File "/opt/netbox/netbox/netbox/wsgi.py", line 12, in <module>
    from django.core.wsgi import get_wsgi_application
ImportError: No module named 'django'
[2017-11-13 18:16:53 -0500] [1976] [INFO] Worker exiting (pid: 1976)
[2017-11-13 18:16:53 -0500] [1977] [INFO] Booting worker with pid: 1977
[2017-11-13 18:16:53 -0500] [1977] [ERROR] Exception in worker process

Any suggestions?  I'm trying to run this on a different port 80 as I have another IPAM that I have in use and need to leave up till I get this working. 

[Jeremy Stretch]

> ImportError: No module named 'django'

This line indicates that the Django framework hasn't been found in your Python path. First, I'll note that you're running Python 3: Make sure you used pip3 to install packages and not pip (which would install them for Python 2).

You can verify installed packages with `pip freeze` (Python 2) and `pip3 freeze` (Python 3).

Jeremy

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[Sean Scarfo]

Verified that packages were installed under pip3.  However, I do see packages under pip as well.  

Suggestions?

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[Sean Scarfo]

Any suggestions on how to make sure Django finds my python path?

[Jeremy Stretch]

Make sure you've installed and are invoking the Python3 version of gunicorn ("pip3 install gunicorn"). To check what version you have installed:

$ head `which gunicorn`
#!/usr/bin/python3
...

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[Sean Scarfo]

Yep, definately shows as 

#!/usr/bin/python3

Any suggestions?

[Jacob Mansfield]

What happens if you run /usr/bin/python3, then type import django?


(Hit Ctrl+D to exit)


Regards,

Jacob Mansfield

www.jacobmansfield.co.uk

@KingCyberJacob

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[Sean Scarfo]

I'm able to enter into the python interpreter, and when I type import django, I get no feedback from the interpreter.  I'm assuming it was able to successfully import the module. 

[Simon Meister]

Not sure but I had the same issue after the upgrade. I changed in gunicorn_config.py the bind to 127.0.0.1:8001 instead of 0.0.0.0:8001

sudo supervisorctl restart netbox

And the netbox was up and running.

Regards,

Simon

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