This tutorial explains how to use a OpenStack image I already built to quickly deploy a Jupyterhub Virtual Machine that can provide a good initial setup for a workshop, providing students access to Python 2/3, Julia, R, file editor and terminal with bash.
For details about building the instance yourself for more customization, see the full tutorial at http://zonca.github.io/2016/04/jupyterhub-sdsc-cloud.html.
Create a Virtual Machine in OpenStack with the pre-built image
Follow the 3 steps at the step by step tutorial under “Create a Virtual Machine in OpenStack”:
- Network setup
- Create a new Virtual Machine: here instead of choosing the base
jupyterhub_docker, also you can choose any size, I recommend to start with a
c1.largefor experimentation, you can then resize it later to a more powerful instance depending on the needs of your workshop
- Give public IP to the instance
Connect to Jupyterhub
The Jupyterhub instance is ready! Just open your browser and connect to the floating IP of the instance you just created.
The browser should show a security error related to the fact that the pre-installed SSL certificate is not trusted, click on “Advanced properties” and choose to connect anyway, we’ll see later how to fix this.
You already have 50 training users, named
training50, all with the same password
jupyterhubSDSC (see below how to change it). Check that you can login and create a notebook.
Administer the Jupyterhub instance
Login into the Virtual Machine with
ssh -i jupyterhub.pem email@example.com using the key file and the public IP setup in the previous steps.
To get rid of the annoying “unable to resolve host” warning, add the hostname of the machine (check by running hostname) to
/etc/hosts, i.e. the first line should become something like
127.0.0.1 localhost jupyterhub if jupyterhub is the hostname
Change password/add more users
In the home folder of the
ubuntu users, there is a file named
create_users.sh, edit it to change the
PASSWORD variable and the number of users from
50 to a larger number. Then run it with
bash create_users.sh. Training users cannot SSH into the machine.
sudo passwd trainingXX to change the password of a single user.
Setup a domain (needed for SSL certificate)
If you do not know how to get a domain name, here some options:
- you can generally request a subdomain name from your institution, see for example UCSD
- if you own a domain, go in the DNS settings, add a record of type A to a subdomain, like
jupyterhub.yourdomain.comthat points to the floating IP of the Jupyterhub instance
- you can get a free dynamic dns at websites like noip.com
In each case you need to have a DNS record of type A that points to the floating IP of the Jupyterhub instance.
Setup a SSL Certificate
Letsencrypt provides free SSL certificates by using a command line client.
SSH into the server, run:
git clone https://github.com/letsencrypt/letsencrypt cd letsencrypt sudo service nginx stop ./letsencrypt-auto certonly --standalone -d jupyterhubdeploy.ddns.net
Follow instructions at the terminal to obtain a certificate
Now open the nginx configuration file:
sudo vim /etc/nginx/nginx.conf
And modify the SSL certificate lines:
ssl_certificate /etc/letsencrypt/live/yoursub.domain.edu/cert.pem; ssl_certificate_key /etc/letsencrypt/live/yoursub.domain.edu/privkey.pem;
sudo service nginx start
Connect again to Jupyterhub and check that your browser correctly detects that the HTTPS connection is safe.
zoncaon the domain