User creation errors in the log upon server startup
Looking at the logs with
sudo journalctl -u jupyterhub
Reveals hundred of errors upon startup:
mars 30 15:51:56 jupytercloud.lal.in2p3.fr jupyterhub[4613]: [I 2020-03-30 15:51:56.878 JupyterHub auth:511] Creating user: adduser --password '#NoLogin' -G do
cker celine.yan-at-u-psud.fr celine.yan-at-u-psud.fr
mars 30 15:51:56 jupytercloud.lal.in2p3.fr jupyterhub[4613]: [E 2020-03-30 15:51:56.885 JupyterHub app:1004] Error adding user celine.yan-at-u-psud.fr already
in db
mars 30 15:51:56 jupytercloud.lal.in2p3.fr jupyterhub[4613]: Traceback (most recent call last):
mars 30 15:51:56 jupytercloud.lal.in2p3.fr jupyterhub[4613]: File "/pdisk/anaconda3-5.1.0/lib/python3.6/site-packages/jupyterhub/app.py", line 1002, in init_us
ers
mars 30 15:51:56 jupytercloud.lal.in2p3.fr jupyterhub[4613]: yield gen.maybe_future(self.authenticator.add_user(user))
mars 30 15:51:56 jupytercloud.lal.in2p3.fr jupyterhub[4613]: File "/pdisk/anaconda3-5.1.0/lib/python3.6/site-packages/jupyterhub/auth.py", line 487, in add_use
r
mars 30 15:51:56 jupytercloud.lal.in2p3.fr jupyterhub[4613]: yield gen.maybe_future(self.add_system_user(user))
mars 30 15:51:56 jupytercloud.lal.in2p3.fr jupyterhub[4613]: File "/pdisk/anaconda3-5.1.0/lib/python3.6/site-packages/jupyterhub/auth.py", line 516, in add_sys
tem_user
mars 30 15:51:56 jupytercloud.lal.in2p3.fr jupyterhub[4613]: raise RuntimeError("Failed to create system user %s: %s" % (name, err))
mars 30 15:51:56 jupytercloud.lal.in2p3.fr jupyterhub[4613]: RuntimeError: Failed to create system user XXX.YYY-at-u-psud.fr: adduser: group 'docker' does n
ot exist
mars 30 15:51:56 jupytercloud.lal.in2p3.fr jupyterhub[4613]: [W 2020-03-30 15:51:56.886 JupyterHub app:1016]
mars 30 15:51:56 jupytercloud.lal.in2p3.fr jupyterhub[4613]: You can set
mars 30 15:51:56 jupytercloud.lal.in2p3.fr jupyterhub[4613]: c.Authenticator.delete_invalid_users = True
mars 30 15:51:56 jupytercloud.lal.in2p3.fr jupyterhub[4613]: to automatically delete users from the Hub database that no longer pass
mars 30 15:51:56 jupytercloud.lal.in2p3.fr jupyterhub[4613]: Authenticator validation,
mars 30 15:51:56 jupytercloud.lal.in2p3.fr jupyterhub[4613]: such as when user accounts are deleted from the external system
mars 30 15:51:56 jupytercloud.lal.in2p3.fr jupyterhub[4613]: without notifying JupyterHub.