Horizon functionality broken after enabling new plugins

[Pierre Riteau]

When an existing Horizon deployment is reconfigured with extra dashboards (for example if enable_horizon_cloudkitty has switched from no to yes) without updating Horizon settings, some dashboard functionality becomes broken: no charts in Overview panel, Launch Instance button not working, etc.

/var/log/kolla/horizon/horizon.log reports issues such as:

[Tue Mar 17 16:19:09.033037 2020] [:error] [pid 75] Exception raised while rendering {% include %} for template 'auth/login.html'. Empty string rendered instead.
[Tue Mar 17 16:19:09.033122 2020] [:error] [pid 75] Traceback (most recent call last):
[Tue Mar 17 16:19:09.033137 2020] [:error] [pid 75] File "/usr/lib/python2.7/site-packages/django/template/loader_tags.py", line 216, in render
[Tue Mar 17 16:19:09.033141 2020] [:error] [pid 75] return template.render(context)
[Tue Mar 17 16:19:09.033145 2020] [:error] [pid 75] File "/usr/lib/python2.7/site-packages/django/template/base.py", line 209, in render
[Tue Mar 17 16:19:09.033149 2020] [:error] [pid 75] return self._render(context)
[Tue Mar 17 16:19:09.033153 2020] [:error] [pid 75] File "/usr/lib/python2.7/site-packages/django/template/base.py", line 199, in _render
[Tue Mar 17 16:19:09.033156 2020] [:error] [pid 75] return self.nodelist.render(context)
[Tue Mar 17 16:19:09.033160 2020] [:error] [pid 75] File "/usr/lib/python2.7/site-packages/django/template/base.py", line 990, in render
[Tue Mar 17 16:19:09.033164 2020] [:error] [pid 75] bit = node.render_annotated(context)
[Tue Mar 17 16:19:09.033168 2020] [:error] [pid 75] File "/usr/lib/python2.7/site-packages/django/template/base.py", line 957, in render_annotated
[Tue Mar 17 16:19:09.033171 2020] [:error] [pid 75] return self.render(context)
[Tue Mar 17 16:19:09.033175 2020] [:error] [pid 75] File "/usr/lib/python2.7/site-packages/compressor/templatetags/compress.py", line 127, in render
[Tue Mar 17 16:19:09.033179 2020] [:error] [pid 75] return self.render_compressed(context, self.kind, self.mode, forced=forced)
[Tue Mar 17 16:19:09.033183 2020] [:error] [pid 75] File "/usr/lib/python2.7/site-packages/compressor/templatetags/compress.py", line 86, in render_compressed
[Tue Mar 17 16:19:09.033187 2020] [:error] [pid 75] return self.render_offline(context)
[Tue Mar 17 16:19:09.033190 2020] [:error] [pid 75] File "/usr/lib/python2.7/site-packages/compressor/templatetags/compress.py", line 71, in render_offline
[Tue Mar 17 16:19:09.033194 2020] [:error] [pid 75] 'You may need to run "python manage.py compress".' % key)
[Tue Mar 17 16:19:09.033198 2020] [:error] [pid 75] OfflineGenerationError: You have offline compression enabled but key "e462cdaf344e8f8d59c0ae440b3cf152" is missing from offline manifest. You may need to run "python manage.py compress".

A workaround is to update local settings and reconfigure horizon, which will properly regenerate static files.

[Radosław Piliszek (yoctozepto)]

So we need another trigger.

[Uriel Medina (uriel-oncloud)]

I can reproduce the same bug, and it always happens with Cloudkitty plugin.
The "solution" I could find by now was to deploy/reconfigure again, as the Horizon container didnt let me to "python manage.py compress" due I couldnt find the right "manage.py" file.

[Michal Nasiadka (mnasiadka)]

All releases mentioned in this bug report are EOL, marking as Invalid.