Pod name generation fails on some images

[ig248]

Pod name generation relies on getpass.getuser(). As per documentation,
getpass.getuser() checks env for LOGNAME, USER, LNAME and USERNAME. As a matter of fact, daskdev/dask:latest does not set these.

[jacobtomlinson]

There are likely many assumptions along these lines. This library is often used with zero-to-jupyterhub which does set these are part of the scheduling.

Would be great to fix this with some more sensible default.

[jacobtomlinson]

The classic KubeCluster was removed in #890. All users will need to migrate to the Dask Operator. Closing.