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ISCAN SPADE server

This is Django server framework for the ISCAN web application used by the SPADE project.

Documentation

Documentation for ISCAN, as well as tutorials, can be found at here.

Prerequisites

ISCAN server uses Docker. This containerization means that the only dependency the user must install is Docker itself.

Preparing Docker

  • Install Docker for Ubuntu. It is easiest to install using the Install from repository method.
  • Complete the post-installation instructions for Docker for Ubuntu. This will make it unnecessary to prepend Docker commands with sudo.
  • Install Docker Compose, the tool for defining and running multi-container Docker applications.

Installation

First, clone the iscan-server repository to your machine:

git clone https://github.com/MontrealCorpusTools/iscan-spade-server.git

Included are a Dockerfile and a docker-compose.yml. In order to build a Docker image from these files, navigate to the root of the repository and run:

docker-compose build

Then, run:

docker-compose up

This will launch the containers.

Development Installation

If you are intending to develop or make changes to ISCAN itself a few things must be done differently.

First, you must also clone the ISCAN repository in the same directory that you cloned your iscan-server directory.

git clone https://github.com/MontrealCorpusTools/ISCAN.git

So, you will have a directory containing the two repos, ISCAN and iscan-spade-server. Then, just cd into the iscan-spade-server directory.

To build the image with development support, run the following command.

docker-compose build --build-arg BUILD_ENV="dev"

This will allow you to make changes in the ISCAN repo directory, and have them reflected in the docker installation.

Initial migrations

The first time you use iscan-server, you will need to make database migrations. In another terminal, while the containers are up, run:

docker-compose run app init

The needed migrations to perform will be detected and made.

Superuser creation

The first time you use iscan-server, you will need to set up a username and password to log in with. In another terminal, while the containers are up, run:

docker-compose run app manage createsuperuser

This will begin a prompt that asks you for a username, email address, and password. Once you have filled them out, the prompt will close.

Then, you should be able to log in with your credentials. You should only need to perform this step once; from now on, whenever you start the server, you should be able to log in with your defined username and password. When finished, press :code:Ctrl+C to end the current server run.

Settings

Certain aspects of the server require changing settings. Most of the settings are set in /iscan_server/settings/base.py but it is unlikely you will need to change these. What you will have to do, however, is edit /iscan_server/settings/local_settings.py. There is a template available there by default.

In order to query the server from remote connections, you must change the ALLOWED_HOSTS parameter in the iscan_server/settings/local_settings.py to include the hostname of your server.

If you intend on accessing the server from the internet directly(i.e. not only on a closed network), you should also changed the SECRET_KEY in base.py.

Use and workflow

Starting and stopping the server

To start the server and its containers using the Docker image, run:

docker-compose up

In your web browser, navigate to localhost:8080. You should see the I-SCAN web page.

To stop the server, press Ctrl+C only once. The terminal should show a Gracefully stopping... message and then exit.

Tests

To run the automatic tests, run:

./runtests.sh

Mounted volumes

This Docker instance is configured so that the contents of certain directories persist between runs of the server, and so that contents are constant between the local directory and the directory in the container. These local directories, located in the root of the repository, are:

  • polyglot_source/ - the directory containing corpora to be loaded.
  • polyglot_data/ - the directory where corpus metadata will be stored
  • pgdb/ - the directory where the front-end code is stored
  • polyglot_server/ - the directory containing the Django project for the server

Changes you make locally in these folders should persist into the container without needing to re-build the Docker image.

Cleaning

The docker-compose up command usefully regenerates fresh containers each time it is run, but old containers can take up space. To clean up containers on your machine, first stop all of them:

docker-compose stop

Then, remove them:

docker-compose rm

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Django server set up for the SPADE project

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