Test with the littlest jupyterhub

[minrk]

Perhaps before we go all the way to kubernetes in #26, we should try using this in the littlest jupyterhub. TLJH is a small, single-machine JupyterHub installation that already includes traefik as an edge proxy (pretty much just for letsencrypt support), in addition to configurable-http-proxy. We could use this traefik-proxy to eliminate the extra configurable-http-proxy service and use only traefik.

What it will look like:

1. remove configurable-http-proxy
2. traefik is already launched by systemd (not by TraefikProxy.start() here, so no 'static configuration' would be loaded from the code in this repo), so static config would have to be created in tljh.
3. probably use the toml implementation in TraefikTomlProxy #31. Alternately, we would need to add and run an etcd service

[GeorgianaElena]

@minrk, I've added new commits addressing your comments in the PR opened on tljh, if you want to take a look.

[GeorgianaElena]

@minrk, there's the test_long_username that fails intermittently in tljh.
From the logs it seems that the timeout to wait for a route (20s currently) ends before the route is actually added. Assuming is not something else, I believe it would be good to increase this timeout since we are dealing with I/O operations. Do you agree?

[minrk]

Yeah, go ahead and increase the timeout on the test to see if it helps.

[GeorgianaElena]

@minrk, thanks a lot for solving the issues with the credentials. Everything seems to work now 🎊