Update readme file

README.md

@@ -1,103 +1,30 @@
 [![Build Status](https://travis-ci.org/cylc/cylc-uiserver.svg?branch=master)](https://travis-ci.org/cylc/cylc-uiserver)
 [![codecov](https://codecov.io/gh/cylc/cylc-uiserver/branch/master/graph/badge.svg)](https://codecov.io/gh/cylc/cylc-uiserver)
 
-# Running Cylc with JupyterHub
+# Cylc UI Server
 
-_This is a Work-In-Progress_
+This project contains the Cylc UI Server. A JupyterHub-compatible application,
+used to display the Cylc UI (or simply UI) to users, and to communicate with
+Workflow Services (WFS).
 
-## Installing requirements
+## Installation
 
-```shell
-$ virtualenv venv
-Using base prefix '/home/kinow/Development/python/anaconda3'
-New python executable in /home/kinow/Development/python/workspace/cylc-jupyterhub/venv/bin/python
-Installing setuptools, pip, wheel...
-done.
-$ . venv/bin/activate
-(venv) $ pip install -e .
-...
-...
-Installing collected packages: tornado, prometheus-client, chardet, idna, certifi, urllib3, requests, pamela, async-generator, python-oauth2, six, python-dateutil, SQLAlchemy, MarkupSafe, Mako, python-editor, alembic, jinja2, ipython-genutils, decorator, traitlets, jupyterhub, cylc-jupyterhub
-  Running setup.py develop for cylc-jupyterhub
-Successfully installed Mako-1.0.7 MarkupSafe-1.1.1 SQLAlchemy-1.2.18 alembic-1.0.7 async-generator-1.10 certifi-2018.11.29 chardet-3.0.4 cylc-jupyterhub decorator-4.3.2 idna-2.8 ipython-genutils-0.2.0 jinja2-2.10 jupyterhub-0.9.4 pamela-1.0.0 prometheus-client-0.6.0 python-dateutil-2.8.0 python-editor-1.0.4 python-oauth2-1.1.0 requests-2.21.0 six-1.12.0 tornado-5.1.1 traitlets-4.3.2 urllib3-1.24.1
-(venv) $ npm install -g configurable-http-proxy
-/home/kinow/.nvm/versions/node/v11.6.0/bin/configurable-http-proxy -> /home/kinow/.nvm/versions/node/v11.6.0/lib/node_modules/configurable-http-proxy/bin/configurable-http-proxy
-+ [email protected]
-added 45 packages from 62 contributors in 5.53s
-(venv) $ jupyterhub --version
-0.9.4
-(venv) $ configurable-http-proxy --version
-4.0.1
-(venv) $ cylc-uiserver
-usage: cylc-uiserver [-h] [-p PORT] -s STATIC
-cylc-uiserver: error: the following arguments are required: -s/--static
-```
+To install the production version, run:
 
-We can start the hub with: `(venv) $ jupyterhub`, and navigate to [http://localhost:8000](http://localhost:8000).
+- `pip install cylc-uiserver`
 
-This starts a JupyterHub instance, with the authenticator **jupyterhub.auth.PAMAuthenticator**,
-and the spawner **jupyterhub.spawner.LocalProcessSpawner**. Look at the file `jupyterhub_config.py`
-in this repository to confirm the spawner used, and the parameters passed. These parameters define
-the directory of static content, and also what is the command that the spawner in JupyterHub must
-use (`cylc-uiserver`).
+And for the development version, run the following from a clone of the project
+git repository.
 
-## Configuration
+- `pip install -e .`
 
-```bash
-(venv) $ jupyterhub --generate-config
-Writing default config to: jupyterhub_config.py
-(venv) $ jupyterhub -f $(pwd -P)/jupyterhub_config.py
-```
-
-By default we have `jupyterhub.spawner.LocalProcessSpawner` as the spawner. It invokes
-a bash shell that executes `jupyterhub-singleuser` with some parameters given via command
-line and environment variables.
-
-In order to have JupyterHub spawning our Cylc UI server, which is initialized by `cylc-uiserver`,
-we have to add the following settings in `jupyterhub_config.py`:
-
-```
-# not necessary as the default, but good nonetheless
-c.JupyterHub.spawner_class = 'jupyterhub.spawner.LocalProcessSpawner'
-c.Spawner.args = ['-s', '../cylc-web/dist/']
-c.Spawner.cmd = ['cylc-uiserver']
-```
-
-The `LocalProcessSpawner` will add `--port` with a random generated port number by default. The
-`c.Spawner.args` includes an extra `-s ../cylc-web/dist`, which is the location where we should
-find the application `index.html` (change for your environment if necessary).
-
-Also note that the `c.Spawner.cmd` is `cylc-uiserver`, which is put in the `$PATH` as part of
-the instructions of the `setup.py` in this repository.
-
-### Authentication
-
-We are after the scenario where a user A can start the UI server, and another user B is able
-to access it too.
-
-With the default authenticator, `jupyterhub.auth.PAMAuthenticator`, if A starts the server,
-B is not even able to authenticate to the running hub. That is because in Linux PAM has
-restrictions in place, and you must be a super user, or wheel member, in order to use it.
-
-But if you start the hub as the root user, in a location that other users can access the files
-(i.e. do not start under `/root`, use something like `/opt` and watch out for _selinux_),
-then you should be able to get all users in the local system authenticating fine.
-
-### Authorization
-
-Once authenticated, the authorization is handled in the UI server. In the vanilla installation,
-Jupyter Notebook would find the Cookie of the logged in user, and then query the Hub about it.
-As we do not have the notebook, the example from Cylc Spawner 01 should work.
-
-It should work means that all users see each others UI servers.
-
-TODO: explain whether we can use the Hub REST API and DB scheme for Cylc workflow services
-authentication.
+Once that is done, the Hub can be started with `jupyterhub`.
+The default URL is [http://localhost:8000](http://localhost:8000).
 
 ### Starting multiple instances of jupyterhub
 
-If you need to run multiple instances of `jupyterhub`, you will have to follow the steps described
-below:
+If you need to run multiple instances of `jupyterhub`, you will have to follow
+the steps described below:
 
 - copy `jupyterhub_config.py` to a different location
 - change the following settings (change the ports to your environment):
@@ -106,7 +33,3 @@ below:
     * `c.JupyterHub.proxy_api_port = 9001`
 - finally start `jupyterhub` using that configuration file
 
-## Services
-
-Q: Would Cylc Review be a service? Perhaps we could choose whether to start it with
-the UI server or not!