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GNU AFFERO GENERAL PUBLIC LICENSE
Version 3, 19 November 2007
Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
Everyone is permitted to copy and distribute verbatim copies
of this license document, but changing it is not allowed.
Preamble
The GNU Affero General Public License is a free, copyleft license for
software and other kinds of works, specifically designed to ensure
cooperation with the community in the case of network server software.
The licenses for most software and other practical works are designed
to take away your freedom to share and change the works. By contrast,
our General Public Licenses are intended to guarantee your freedom to
share and change all versions of a program--to make sure it remains free
software for all its users.
When we speak of free software, we are referring to freedom, not
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Developers that use our General Public Licenses protect your rights
with two steps: (1) assert copyright on the software, and (2) offer
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A secondary benefit of defending all users' freedom is that
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software used on network servers, this result may fail to come about.
The GNU General Public License permits making a modified version and
letting the public access it on a server without ever releasing its
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The GNU Affero General Public License is designed specifically to
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provide the source code of the modified version running there to the
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code of the modified version.
An older license, called the Affero General Public License and
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a different license, not a version of the Affero GPL, but Affero has
released a new version of the Affero GPL which permits relicensing under
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TERMS AND CONDITIONS
0. Definitions.
"This License" refers to version 3 of the GNU Affero General Public License.
"Copyright" also means copyright-like laws that apply to other kinds of
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The Corresponding Source need not include anything that users
can regenerate automatically from other parts of the Corresponding
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The Corresponding Source for a work in source code form is that
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All rights granted under this License are granted for the term of
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that supports equivalent copying facilities, provided you maintain
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you inform other peers where the object code and Corresponding
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product received by a particular user, "normally used" refers to a
typical or common use of that class of product, regardless of the status
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requirement to continue to provide support service, warranty, or updates
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Corresponding Source conveyed, and Installation Information provided,
in accord with this section must be in a format that is publicly
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remove any additional permissions from that copy, or from any part of
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All other non-permissive additional terms are considered "further
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received it, or any part of it, contains a notice stating that it is
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must place, in the relevant source files, a statement of the
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where to find the applicable terms.
Additional terms, permissive or non-permissive, may be stated in the
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the above requirements apply either way.
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You may not propagate or modify a covered work except as expressly
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However, if you cease all violation of this License, then your
license from a particular copyright holder is reinstated (a)
provisionally, unless and until the copyright holder explicitly and
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holder fails to notify you of the violation by some reasonable means
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Moreover, your license from a particular copyright holder is
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violation by some reasonable means, this is the first time you have
received notice of violation of this License (for any work) from that
copyright holder, and you cure the violation prior to 30 days after
your receipt of the notice.
Termination of your rights under this section does not terminate the
licenses of parties who have received copies or rights from you under
this License. If your rights have been terminated and not permanently
reinstated, you do not qualify to receive new licenses for the same
material under section 10.
9. Acceptance Not Required for Having Copies.
You are not required to accept this License in order to receive or
run a copy of the Program. Ancillary propagation of a covered work
occurring solely as a consequence of using peer-to-peer transmission
to receive a copy likewise does not require acceptance. However,
nothing other than this License grants you permission to propagate or
modify any covered work. These actions infringe copyright if you do
not accept this License. Therefore, by modifying or propagating a
covered work, you indicate your acceptance of this License to do so.
10. Automatic Licensing of Downstream Recipients.
Each time you convey a covered work, the recipient automatically
receives a license from the original licensors, to run, modify and
propagate that work, subject to this License. You are not responsible
for enforcing compliance by third parties with this License.
An "entity transaction" is a transaction transferring control of an
organization, or substantially all assets of one, or subdividing an
organization, or merging organizations. If propagation of a covered
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give under the previous paragraph, plus a right to possession of the
Corresponding Source of the work from the predecessor in interest, if
the predecessor has it or can get it with reasonable efforts.
You may not impose any further restrictions on the exercise of the
rights granted or affirmed under this License. For example, you may
not impose a license fee, royalty, or other charge for exercise of
rights granted under this License, and you may not initiate litigation
(including a cross-claim or counterclaim in a lawsuit) alleging that
any patent claim is infringed by making, using, selling, offering for
sale, or importing the Program or any portion of it.
11. Patents.
A "contributor" is a copyright holder who authorizes use under this
License of the Program or a work on which the Program is based. The
work thus licensed is called the contributor's "contributor version".
A contributor's "essential patent claims" are all patent claims
owned or controlled by the contributor, whether already acquired or
hereafter acquired, that would be infringed by some manner, permitted
by this License, of making, using, or selling its contributor version,
but do not include claims that would be infringed only as a
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Each contributor grants you a non-exclusive, worldwide, royalty-free
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In the following three paragraphs, a "patent license" is any express
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sue for patent infringement). To "grant" such a patent license to a
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If you convey a covered work, knowingly relying on a patent license,
and the Corresponding Source of the work is not available for anyone
to copy, free of charge and under the terms of this License, through a
publicly available network server or other readily accessible means,
then you must either (1) cause the Corresponding Source to be so
available, or (2) arrange to deprive yourself of the benefit of the
patent license for this particular work, or (3) arrange, in a manner
consistent with the requirements of this License, to extend the patent
license to downstream recipients. "Knowingly relying" means you have
actual knowledge that, but for the patent license, your conveying the
covered work in a country, or your recipient's use of the covered work
in a country, would infringe one or more identifiable patents in that
country that you have reason to believe are valid.
If, pursuant to or in connection with a single transaction or
arrangement, you convey, or propagate by procuring conveyance of, a
covered work, and grant a patent license to some of the parties
receiving the covered work authorizing them to use, propagate, modify
or convey a specific copy of the covered work, then the patent license
you grant is automatically extended to all recipients of the covered
work and works based on it.
A patent license is "discriminatory" if it does not include within
the scope of its coverage, prohibits the exercise of, or is
conditioned on the non-exercise of one or more of the rights that are
specifically granted under this License. You may not convey a covered
work if you are a party to an arrangement with a third party that is
in the business of distributing software, under which you make payment
to the third party based on the extent of your activity of conveying
the work, and under which the third party grants, to any of the
parties who would receive the covered work from you, a discriminatory
patent license (a) in connection with copies of the covered work
conveyed by you (or copies made from those copies), or (b) primarily
for and in connection with specific products or compilations that
contain the covered work, unless you entered into that arrangement,
or that patent license was granted, prior to 28 March 2007.
Nothing in this License shall be construed as excluding or limiting
any implied license or other defenses to infringement that may
otherwise be available to you under applicable patent law.
12. No Surrender of Others' Freedom.
If conditions are imposed on you (whether by court order, agreement or
otherwise) that contradict the conditions of this License, they do not
excuse you from the conditions of this License. If you cannot convey a
covered work so as to satisfy simultaneously your obligations under this
License and any other pertinent obligations, then as a consequence you may
not convey it at all. For example, if you agree to terms that obligate you
to collect a royalty for further conveying from those to whom you convey
the Program, the only way you could satisfy both those terms and this
License would be to refrain entirely from conveying the Program.
13. Remote Network Interaction; Use with the GNU General Public License.
Notwithstanding any other provision of this License, if you modify the
Program, your modified version must prominently offer all users
interacting with it remotely through a computer network (if your version
supports such interaction) an opportunity to receive the Corresponding
Source of your version by providing access to the Corresponding Source
from a network server at no charge, through some standard or customary
means of facilitating copying of software. This Corresponding Source
shall include the Corresponding Source for any work covered by version 3
of the GNU General Public License that is incorporated pursuant to the
following paragraph.
Notwithstanding any other provision of this License, you have
permission to link or combine any covered work with a work licensed
under version 3 of the GNU General Public License into a single
combined work, and to convey the resulting work. The terms of this
License will continue to apply to the part which is the covered work,
but the work with which it is combined will remain governed by version
3 of the GNU General Public License.
14. Revised Versions of this License.
The Free Software Foundation may publish revised and/or new versions of
the GNU Affero General Public License from time to time. Such new versions
will be similar in spirit to the present version, but may differ in detail to
address new problems or concerns.
Each version is given a distinguishing version number. If the
Program specifies that a certain numbered version of the GNU Affero General
Public License "or any later version" applies to it, you have the
option of following the terms and conditions either of that numbered
version or of any later version published by the Free Software
Foundation. If the Program does not specify a version number of the
GNU Affero General Public License, you may choose any version ever published
by the Free Software Foundation.
If the Program specifies that a proxy can decide which future
versions of the GNU Affero General Public License can be used, that proxy's
public statement of acceptance of a version permanently authorizes you
to choose that version for the Program.
Later license versions may give you additional or different
permissions. However, no additional obligations are imposed on any
author or copyright holder as a result of your choosing to follow a
later version.
15. Disclaimer of Warranty.
THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
16. Limitation of Liability.
IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
SUCH DAMAGES.
17. Interpretation of Sections 15 and 16.
If the disclaimer of warranty and limitation of liability provided
above cannot be given local legal effect according to their terms,
reviewing courts shall apply local law that most closely approximates
an absolute waiver of all civil liability in connection with the
Program, unless a warranty or assumption of liability accompanies a
copy of the Program in return for a fee.
END OF TERMS AND CONDITIONS
How to Apply These Terms to Your New Programs
If you develop a new program, and you want it to be of the greatest
possible use to the public, the best way to achieve this is to make it
free software which everyone can redistribute and change under these terms.
To do so, attach the following notices to the program. It is safest
to attach them to the start of each source file to most effectively
state the exclusion of warranty; and each file should have at least
the "copyright" line and a pointer to where the full notice is found.
<one line to give the program's name and a brief idea of what it does.>
Copyright (C) <year> <name of author>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published
by the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
Also add information on how to contact you by electronic and paper mail.
If your software can interact with users remotely through a computer
network, you should also make sure that it provides a way for users to
get its source. For example, if your program is a web application, its
interface could display a "Source" link that leads users to an archive
of the code. There are many ways you could offer source, and different
solutions will be better for different programs; see section 13 for the
specific requirements.
You should also get your employer (if you work as a programmer) or school,
if any, to sign a "copyright disclaimer" for the program, if necessary.
For more information on this, and how to apply and follow the GNU AGPL, see
<https://www.gnu.org/licenses/>.
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# Interactive Data Analysis Hub
A JupyterHub example deployment for connecting to an OIDC Provider and providing access tokens to sofware running in the notebook.
## How does it work
Jupyter hub provides an `/user` endpoint in it's api which allows a logged in
user to view it's own information. The default jupyter hub only shows `auth_state` information when the user has the `admin` role. Using the [AuthStateJupyterHub](https://gitlab.cern.ch/escape-wp2/docker-images/-/tree/master/jupyterhub/jupyterhub.d/AuthStateJupyterHub) from CERN's Swanhub is a wrapper which allows the tokens to be visible to all logged in users.
Using the `OIDCAuthenticator` from the same [repo](https://gitlab.cern.ch/escape-wp2/docker-images/-/tree/master/jupyterhub/jupyterhub.d/OIDCAuthenticator) it allows to connect to OIDC providers for authentication.
## Configuring
* Setup an IAM client: `https://iam-escape.cloud.cnaf.infn.it/manage/dev/dynreg/new`
* Make sure that the redirect URI's are set-up correctly including http(s)://
* The following scopes are required:
* `openid`
* `profile`
* `email`
* `offline_acces` (for refresh tokens)
* `wlcg.groups`
* `wlcg`
* The following grant types should be enabled:
* `code`
* `refresh`
* `token exchange` (requires manual intervention by the IAM administrator, ask on rocketchat)
* Copy `hub.env.example` to `hub.env`
```
# client and secret id generated by registering the application in IAM
OAUTH_CLIENT_ID=
OAUTH_CLIENT_SECRET=
# ODIC address and list (multiple entries separated by `,`) of audiences
OIDC_ISSUER=https://iam-escape.cloud.cnaf.infn.it/
OAUTH_ALLOWED_AUDIENCES=https://wlcg.cern.ch/jwt/v1/any
# List of audiences to exchange tokens for (e.g. rucio, esap etc.)
EXCHANGE_TOKENS=rucio
# Key used to encrypt the tokens stored in the Jupyter Database
# can be generated by openssl:
JUPYTERHUB_CRYPT_KEY=$(openssl rand -hex 32)
```
## Running the Hub
```bash
docker-compose build
docker pull <notebook image> # optional: to speed up the launching of new containers
# jupyterhub/singleuser:<jupyterhub version> by default
docker-compose up -d
```
## Accessing exchanged tokens in a notebook
```python
import os
import requests
URL = os.getenv("JUPYTERHUB_API_URL")
TOKEN = os.getenv("JUPYTERHUB_API_TOKEN")
res = requests.get(f"{URL}/user", headers={"Authorization": f"token {TOKEN}"})
res.json()["auth_state"]["exchanged_tokens"]["rucio"]
```
To prevent requesting the API for the token, the JWT should be cached by the requesting software. The cache can be invalidated by decoding the JWT and looking for the `exp` claim, which is a Unix timestamp for invalidation. The jupyter hub takes care of refreshing the tokens which are provided via the Hub API.
One example of softare caching the tokens is [SwanOauthRenew](https://github.com/swan-cern/jupyter-extensions/tree/master/SwanOauthRenew). **TODO**: add configuration information
## Caveats
* No SSL configured, but can easily added by prodivind a ssl key and cert or using NGINX as Reverse proxy
* There is no persistent filesystem yet in this configuration. The containers are kept around by the jupyter hub, but their data is lost when stopped containers are cleaned up.
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version: "3.5"
services:
hub:
image: ida_hub
build: hub
ports:
- "8000:8000"
volumes:
- "/var/run/docker.sock:/var/run/docker.sock" # allow this container to spawn docker containers
networks:
- hub_network
env_file: hub.env
networks:
hub_network:
name: hub_network
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OAUTH_CLIENT_ID=
OAUTH_CLIENT_SECRET=
OIDC_ISSUER=
OAUTH_ALLOWED_AUDIENCES=
EXCHANGE_TOKENS=
JUPYTERHUB_CRYPT_KEY=
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hub/Dockerfile 0 → 100644
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FROM jupyterhub/jupyterhub
# Install Docker
RUN apt-get update && apt-get install -y \
apt-transport-https \
ca-certificates \
curl \
gnupg \
git \
lsb-release
RUN curl -fsSL https://download.docker.com/linux/ubuntu/gpg | gpg --dearmor -o /usr/share/keyrings/docker-archive-keyring.gpg
RUN echo \
"deb [arch=$(dpkg --print-architecture) signed-by=/usr/share/keyrings/docker-archive-keyring.gpg] https://download.docker.com/linux/ubuntu \
$(lsb_release -cs) stable" | tee /etc/apt/sources.list.d/docker.list > /dev/null
RUN apt-get update && apt-get -y install docker-ce-cli
# Install docker spawner and OIDCAuthenticator and AuthStateJupyterHub
RUN pip install dockerspawner jupyter_client
RUN pip install "git+https://gitlab.cern.ch/escape-wp2/docker-images.git#egg=oidcauthenticator&subdirectory=jupyterhub/jupyterhub.d/OIDCAuthenticator"
RUN pip install "git+https://gitlab.cern.ch/escape-wp2/docker-images.git#egg=authstatejupyterhub&subdirectory=jupyterhub/jupyterhub.d/AuthStateJupyterHub"
COPY jupyterhub_minimal_config.py /usr/local/etc/jupyterhub/jupyterhub_config.py
CMD ["authstatejupyterhub", "--config", "/usr/local/etc/jupyterhub/jupyterhub_config.py"]
hub/jupyterhub_minimal_config.py 0 → 100644
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import os
from jupyter_client.localinterfaces import public_ips
c.JupyterHub.authenticator_class = 'oidcauthenticator.OIDCAuthenticator'
c.OIDCAuthenticator.username_key = 'preferred_username'
c.OIDCAuthenticator.scope = ['openid', 'profile', 'offline_access']
c.OIDCAuthenticator.allowed_roles = []
c.OIDCAuthenticator.check_signature=True
c.OIDCAuthenticator.verify_aud=True
c.OIDCAuthenticator.allowed_audience=os.environ["OAUTH_ALLOWED_AUDIENCES"].split(",")
c.OIDCAuthenticator.exchange_tokens = os.environ["EXCHANGE_TOKENS"].split(",")
c.OIDCAuthenticator.jwt_signing_algorithms = ["RS256"]
c.OIDCAuthenticator.oidc_issuer = os.environ["OIDC_ISSUER"]
c.OIDCAuthenticator.enable_auth_state = True
# The docker instances need access to the Hub, so the default loopback port doesn't work:
c.JupyterHub.hub_ip = public_ips()[0]
# spawn with Docker
c.JupyterHub.spawner_class = 'dockerspawner.DockerSpawner'
# This should be the same as in the docker-compose.yml file
network_name = "hub_network"
c.DockerSpawmer.use_internal_ip = True
c.DockerSpawner.network_name = network_name
c.DockerSpawner.extra_host_config = { 'network_mode': network_name }
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