The Gunicorn type now supports systemd sockets only. With uWSGI, you can
choose between it and the native sockets based on the parameters chosen.
This is done because it could not be implemented to have multiple
protocols with the systemd sockets (so you may choose).
The systemd socket unit file is generally available, so both types use
the same script to generate the socket unit file.
Cause of corrupt databases if the services are restarted incorrectly,
the order and dependencies are adjusted. Now, the `netbox-rq` service
will be included in restarts of `netbox` and required for the WSGI
servers that it must running.
For these changes, the restart command of `__netbox` was adjusted. The
other ones where edited too, to use the same command.
All services now require redis and postgresql to be started before them
to prevent any start order issues.
If someone asked for what the RQ worker is required, see here:
https://netbox.readthedocs.io/en/stable/additional-features/webhooks/#webhook-processing
The `uwsgi-netbox` service now works, also the `netbox` wrapper service.
The PID file was removed from the Gunicorn service as it is not required
and a bit more efford to move it to `/run/` due to permissions.
Generally, all depend on `network.target` instead of
`network-online.target` now, and signals for reload, stop and kill were
added (especially required the uwsgi service).
The wrapper service will "control" the services added from the
__netbox_* types to provide a general interface. This is more dynamic
than the alias approach used previously. Through this, it is possible
to handle multiple wsgi services for netbox - if this works ..
See as a reference:
http://alesnosek.com/blog/2016/12/04/controlling-a-multi-service-application-with-systemd/
Because someone *want* to use something other than just gunicorn, it was
extracted to a own type. Because gunicorn is a bit deep in the netbox
installation process, it's a bit harder to isolate it.
`__netbox_uwsgi` will come, too.
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