Jupyterhub: c.JupyterHub.logo_file is not working on after Jupyterhub Version: 0.8.1 upgrade

[pkasinathan]

Hi,

I upgraded Jupterhub from 0.6 to 0.8.1. Everything looks good so far, except logo file feature.

I override the Jupyter logo file by mentioning the below config, but it's not working. I'm still getting the original Jupyter logo. It was working previously.

c.JupyterHub.logo_file = '/path/to/my_logo.png'

Please let me know how to fix the issue.

Thanks!

[minrk]

That same config continues to work in 0.8.1. Are you sure your config file is being loaded?

[pkasinathan]

Hi @minrk, Thanks for looking into it.

Yes, my configuration was correctly loaded.

To confirm it, I modified app.py to see whether my logo file is getting loaded. And, I can see the log file showing as Loading logo file - /opt/jupyterhub/images/my_notebooks_logo.png.

Script Changes:

    def init_handlers(self):
        ....
        h.append((r'/logo', LogoHandler, {'path': self.logo_file}))
        self.log.info("Loading logo file - %s", self.logo_file)

Log File:

[18:53]:[root@jupy004:jupyterhub]# cat /opt/jupyterhub/logs/jupyterhub.jupy004.log 
[D 2017-12-16 18:52:56.937 JupyterHub application:555] Looking for /opt/jupyterhub/jupyterhub_config_dev in /opt/jupyterhub
[D 2017-12-16 18:52:56.938 JupyterHub application:577] Loaded config file: /opt/jupyterhub/jupyterhub_config_dev.py
[W 2017-12-16 18:52:56.939 JupyterHub app:489] JupyterHub.api_tokens is pending deprecation since JupyterHub version 0.8.  Consider using JupyterHub.service_tokens.  If you have a use case for services that identify as users, let us know: https://github.com/jupyterhub/jupyterhub/issues
[D 2017-12-16 18:52:56.939 JupyterHub app:1350] Writing PID 59757 to /opt/jupyterhub/pid/jupyterhub.jupy004.pid
[I 2017-12-16 18:52:56.942 JupyterHub app:836] Loading cookie_secret from /opt/jupyterhub/jupyterhub_cookie_secret
[D 2017-12-16 18:52:56.942 JupyterHub app:888] Connecting to db: sqlite:////opt/jupyterhub/db/jupyterhub.jupy004.sqlite
[D 2017-12-16 18:52:56.954 JupyterHub orm:504] database schema version found: 3ec6993fe20c
[I 2017-12-16 18:52:56.975 JupyterHub app:985] Not using whitelist. Any authenticated user will be allowed.
[D 2017-12-16 18:52:57.001 JupyterHub app:1087] Not duplicating token <APIToken('1a21...', user='prabhu')>
[D 2017-12-16 18:52:57.006 JupyterHub user:184] Creating <class 'MySpawner'> for root:
[D 2017-12-16 18:52:57.007 JupyterHub app:1213] Loading state for root from db
[D 2017-12-16 18:52:57.007 JupyterHub app:1238] root not running
[D 2017-12-16 18:52:57.010 JupyterHub user:184] Creating <class 'MySpawner'> for prabhu:
[D 2017-12-16 18:52:57.011 JupyterHub app:1213] Loading state for prabhu from db
[D 2017-12-16 18:52:57.012 JupyterHub app:1238] prabhu not running
[D 2017-12-16 18:52:57.013 JupyterHub app:1243] Loaded users: 
        root admin
    prabhu admin
[I 2017-12-16 18:52:57.013 JupyterHub app:795] Loading logo file - /opt/jupyterhub/images/my_notebooks_logo.png
[I 2017-12-16 18:52:57.017 JupyterHub app:1530] Hub API listening on http://127.0.0.1:8081/hub/

But, when I hit https://jupyter.myhost.com:8443/hub/logo, I see only the jupyter logo and my logo is not getting loaded.

Can you please guide me how to fix the issue? Thanks in advance!

Thanks
Prabhu

[minrk]

Have you tried clearing your cache and/or loading in an incognito/private window?

[pkasinathan]

It worked! I just cleared my browser cache and it displayed updated image. Awesome!

Thanks @minrk!