Handle plugins + add healtcheck plugin

Support the installation of plugins, and add the healthcheck plugin,
which we use for status reports to the reverse proxy servers, as a first
one.

Signed-off-by: Georg Pfuetzenreuter <georg.pfuetzenreuter@suse.com>

Dockerfile

@@ -66,6 +66,18 @@ COPY docker/launch-netbox.sh /opt/netbox/launch-netbox.sh
 COPY configuration/ /etc/netbox/config/
 COPY docker/nginx-unit.json /etc/unit/
 
+# Plugins and plugin configuration
+COPY ./plugin_requirements.txt /opt/netbox/
+COPY configuration/configuration.py /etc/netbox/config/configuration.py
+COPY configuration/plugins.py /etc/netbox/config/plugins.py
+
+# Plugin configuration only possible via settings.py
+COPY ./local_settings.py /opt/netbox/netbox/netbox/
+
+# Install plugins
+RUN /opt/netbox/venv/bin/pip install  --no-warn-script-location -r /opt/netbox/plugin_requirements.txt
+RUN SECRET_KEY="dummydummydummydummydummydummydummydummydummydummy" /opt/netbox/venv/bin/python /opt/netbox/netbox/manage.py collectstatic --no-input
+
 WORKDIR /opt/netbox/netbox
 
 # Must set permissions for '/opt/netbox/netbox/media' directory

local_settings.py

@@ -0,0 +1,4 @@
+from os import environ
+from urllib.parse import quote
+
+REDIS_URL = f"redis://:{quote(environ.get('REDIS_PASSWORD', ''))}@{environ.get('REDIS_HOST', 'localhost')}:{environ.get('REDIS_PORT', '6379')}/{environ.get('REDIS_DATABASE', '1')}"

plugin_requirements.txt

@@ -0,0 +1 @@
+git+https://github.com/netbox-community/netbox-healthcheck-plugin