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tags: binder, meeting, notes
---

# JupyterHub and BinderHub Team Meeting - January

Date: 17 January 2019 at 6pm Zurich time

**Videoconference link:** https://calpoly.zoom.us/my/jupyter
[Link to prior meeting's virtual meeting report](https://hackmd.io/KS4Tw2__RVWJgiZ_5aeanA)

## Welcome to the Team Meeting

Hello!

If you are joining the team video meeting, sign in below so we know who was here. Roll call:

* name / institution / GitHub handle
* Zach / Cal Poly / @Zsailer
* Tim / WTT / @betatim
* Carol / Project Jupyter / @willingc
* Craig Willis / NCSA / @craig-willis
* Joe Hamman / NCAR-Pangeo / @jhamman
* Yuvi Panda / UCB / @yuvipanda
* Lindsey Heagy / UCB / @lheagy
* Kacper Kowalik / NCSA / @xarthisius
* Brian / Cal Poly / @ellisonbg

## Agenda items

Let's collect all potential agenda items here before the start of the meeting (**closing time 24h before**). We will then attempt to create a coherent agenda that fits in the 60m meeting slot. If there are similar items try and group them already.

* Resources definitions/requests by the repository creator or repository launcher, following up on December 2018 [name=@jhamman]
* relevant issues: https://github.com/jupyterhub/binderhub/issues/731, https://github.com/jupyterhub/binderhub/issues/759, https://github.com/jupyterhub/binderhub/issues/712
* Relevant questions
* What resource fields do we need?
* Can use the Kubernetes docs as a reference (since ultimately we'll be passing the values of these fields to k8s)
* check if we can read docker image LABELs without pulling the image? If yes then storing resource requests in the repo and repo2docker will store it in LABELs
* Q from Craig: Why encode things in the URL parameter, why not allow them to be encoded in the repository itself (e.g., so an author could define the resources needed for a repo to run)
* The URL parameter stuff wouldn't preclude this from being possible - one idea is to let authors store this in the repository, and set some kind of "defaults" in the built docker image than could be *overridden* by URL parameters.

* Rust End of year thoughts/what is next style process, see https://discourse.jupyter.org/t/end-of-year-thoughts-from-the-rust-community/295/7?u=betatim
* propose to create a post on the discourse forum asking for blogs/tweets/gists/replies for the next four(?) weeks which then get compiled into the Binder Roadmap for the next 12months. [name=@betatim]
* When would we start this?
* Maybe after dev meeting in March.
* Make it clear that this is about getting input and ideas, taking the temperature, not about formal proposals and deliverables
* How do we collect suggestions from the many different mediums?
* Use discourse as the primary list and allow others to link to their ideas from there.
* Reach out to the Rust community to ask for adivce on mechanics and such
* Tim contacts Luiz Irber (Determine time to produce, resources that did the work re: paid/volunteer)
* If you don't have a highly structured format for such ideas, it becomes difficult to evaluate suggestions from the community. Maybe suggest a format/questions to make it easier to digest?

* JupyterHub Helm Chart v 0.8 [nearly ready to go](https://github.com/jupyterhub/zero-to-jupyterhub-k8s/issues?q=is%3Aissue+is%3Aopen+sort%3Aupdated-desc+milestone%3A0.8) [name=@choldgraf]
* Has been about 7 months since last release
* Only remaining issue is to find a list of the JupyterHub versions for each helm chart. Does anybody know this? (https://github.com/jupyterhub/zero-to-jupyterhub-k8s/issues/1094)
* Need to update the change log.
* Anything else to be done?

* (no need to discuss) Chris would like help putting together a "how to spot a bitcoin miner" page in the SRE guide. He opened an issue to put together a list of tips (https://github.com/jupyterhub/mybinder.org-deploy/issues/879)
* +100 Tim plans to write what he knows in the PR with the "find high CPU pods and processes"

* (no need to discuss) Chris would like help finishing the BinderHub@NeurIPS post: https://hackmd.io/ZEVbmiWHQiOuRUQzRmjnNg?edit

* Graphics, diagrams, drawings, "zines"
* Tim is commissioning work to help explain what Binder is, how to use it, etc +100
* Will probably select a small agency in Germany based on recommendations
* They will pitch a concept mid February
* Ideas for what kind of artefacts would be useful for the project welcome
* Need to figure out how to integrate this into the normal GitHub based workflow. I don't think they've ever worked with an open-source project like us.
* Figma, is like sketch but web-based good for collaborating and reviewing work
* Cool binder drawing: https://pbs.twimg.com/media/Dwe4jVdU0AA2Ss-.jpg:large
* Apparently figma and slack paid the same design firm for their logo :-)
* 
* 
* Three one pagers
* architecture and ecosystem for JupyterHub
* architecture and ecosystem for BinderHub
* how does it work and ecosystem for mybinder.org

* repo2docker.version PR check-in - Craig
* Is there anything useful to discuss that isn't covered on Github?
* https://github.com/jupyter/repo2docker/pull/550
* use local repo2docker to fetch source
* local repo2docker starts a containerised repo2docker-in-specified-version with a local directory content provider

Items added after the cut-off will be in the "bonus material" section. We will go through the ordinary agenda items first and then cover bonus items if the clock hasn't run out.

## Reports

Things people should know about.

* Cost per student for Berkeley's hub (of 4.5k students) is between 1$ / month / user to 2$ / month / user based on how active a student is before you consider them a 'user'. Open (anonymized) data + cool graphs at https://github.com/berkeley-dsep-infra/datahub-usage-analysis/blob/master/notebooks/03-visualize-cost-and-usage.ipynb. Mean daily active users is 1006 students! (Yuvi)
* how does the cost scale if your cluster has less users?
* if I only have 100 students, do I still only pay $1 per student or more because there are "fixed" costs
* Yuvi working on getting Space Telescope Sciences Institute to buy out some of his time at Berkeley to focus more on JupyterHub / BinderHub
* RStudio has explicitly granted us trademark permission on mybinder.org

Our next meeting is **February 21st, 2019** at 6pm Zurich time.