experimenter/README.md

# Mozilla Experimenter

[![CircleCI](https://circleci.com/gh/mozilla/experimenter.svg?style=svg)](https://circleci.com/gh/mozilla/experimenter)

<p align="center">
  <img src="https://cdn1.iconfinder.com/data/icons/simple-arrow/512/arrow_20-128.png"><br/>
  <b>1. Design 2. Launch 3. Analyze</b>
  <br><br>
</p>

Experimenter is a platform for managing experiments in [Mozilla Firefox](https://www.mozilla.org/en-US/firefox/?utm_medium=referral&utm_source=firefox-com).

## Deployments

### Staging

<https://stage.experimenter.nonprod.dataops.mozgcp.net/>

### Production

<https://experimenter.services.mozilla.com/>

## Installation

### General Setup

1.  Install [docker](https://www.docker.com/) on your machine

  - On linux, [setup docker to run as non-root](https://docs.docker.com/engine/security/rootless/)

1.  Clone the repo

        git clone <your fork>

1.  Copy the sample env file

        cp .env.sample .env

1.  Set DEBUG=True for local development

        vi .env

1.  Create a new secret key and put it in .env

        make secretkey

1.  Run tests

        make test

1.  Setup the database

        make refresh

#### Fully Dockerized Setup (continuation from General Setup 1-7)

1.  Run a dev instance

        make up

1.  Navigate to it and add an SSL exception to your browser

        https://localhost/

#### Semi Dockerized Setup (continuation from General Setup 1-7)

One might choose the semi dockerized approach for:

1. faster startup/teardown time (not having to rebuild/start/stop containers)
1. better ide integration

Notes:

* Node ^14.0.0 is required

* [osx catalina, reinstall command line tools](https://medium.com/flawless-app-stories/gyp-no-xcode-or-clt-version-detected-macos-catalina-anansewaa-38b536389e8d)

* [poetry](https://python-poetry.org/docs/#installation)

### Semi Dockerized Setup

1.  Pre reqs (macOs instructions)

        brew install postgresql llvm openssl yarn

        echo 'export PATH="/usr/local/opt/llvm/bin:$PATH"' >> ~/.bash_profile
        export LIBRARY_PATH=$LIBRARY_PATH:/usr/local/opt/openssl/lib/

2.  Install dependencies

        source .env

        poetry install (cd into app)

        yarn install

3.  env values

        .env (set at root):
        DEBUG=True
        DB_HOST=localhost
        HOSTNAME=localhost

4.  Start postgresql, redis, autograph, kinto

        make up_db

5.  Django app

        # in app

        poetry shell

        yarn workspace @experimenter/nimbus-ui build
        yarn workspace @experimenter/core build
        yarn workspace @experimenter/rapid build
        ./manage.py runserver 0.0.0.0:7001

Pro-tip: we have had at least one large code refactor. You can ignore specific large commits when blaming by setting the Git config's `ignoreRevsFile` to `.git-blame-ignore-revs`:

```
git config blame.ignoreRevsFile .git-blame-ignore-revs
```

### Google Credentials

On certain pages an API endpoint is called to receive experiment analysis data from Jetstream to display visualization tables. To see experiment visualization data, you must provide GCP credentials.

1. Generate a GCP private key file.
  - Ask in #experimenter for the GCP link to create a new key file.
  - Add Key > Create New Key > JSON > save this file.
  - Do not lose or share this file. It's unique to you and you'll only get it once.
2. Rename the file to `google-credentials.json` and place it anywhere inside the `/app` directory.
3. Update your `.env` so that `GOOGLE_APPLICATION_CREDENTIALS` points to this file. If your file is inside the `/app` directory it would look like this:
    ```
    GOOGLE_APPLICATION_CREDENTIALS=/app/google-credentials.json
    ```

## Usage

Experimenter uses [docker](https://www.docker.com/) for all development, testing, and deployment.

The following helpful commands have been provided via a Makefile:

### build

Build the application container by executing the [build script](https://github.com/mozilla/experimenter/blob/main/scripts/build.sh)

### compose_build

Build the supporting services (nginx, postgresql) defined in the [compose file](https://github.com/mozilla/experimenter/blob/main/docker-compose.yml)

### up

Start a dev server listening on port 80 using the [Django runserver](https://docs.djangoproject.com/en/1.10/ref/django-admin/#runserver)

### up_db

Start postgresql, redis, autograph, kinto on their respective ports to allow running the Django runserver and yarn watchers locally (non containerized)

### up_django

Start Django runserver, Celery worker, postgresql, redis, autograph, kinto on their respective ports to allow running the yarn watchers locally (non containerized)

### up_detached

Start all containers in the background (not attached to shell)

### check

Run all test and lint suites, this is run in CI on all PRs and deploys

### migrate

Apply all django migrations

### load_locales_countries

Populates locales and countries

### load_dummy_experiments

Populates db with dummy experiments

### bash

Start a bash shell inside the container (this lets you interact with the containerized filesystem and run Django management commands)

### ssl

Create dummy SSL certs to use the dev server over a locally secure
connection. This helps test client behaviour with a secure
connection. This task is run automatically when needed.

### kill

Stop and delete all docker containers.
WARNING: this will remove your database and all data. Use this to reset your dev environment.

### refresh

Run kill, migrate, load_locales_countries load_dummy_experiments

### integration_test

Run the integration test suite inside a containerized instance of Firefox. You must also be already running a `make up` dev instance in another shell to run the integration tests.

### integration_vnc_up

Start a linux VM container with VNC available over `vnc://localhost:5900` with password `secret`. Right click on the desktop and select `Applications > Shell > Bash` and enter `tox -c tests/integration/` to run the integration tests and watch them run in a Firefox instance you can watch and interact with.

## Frontend

Experimenter has three front-end UIs right now:

- [`core`](./app/experimenter/legacy-ui/core) is the current UI used for Experimenter intake.
- [`rapid`](./app/experimenter/legacy-ui/core) is a partially-built React UI.
- [`nimbus-ui`](./app/experimenter/nimbus-ui) is a new React UI for an upcoming Experimenter refactor.

Learn more about the organization of these UIs [here](./app/experimenter/legacy-ui/README.md).

## API

API documentation can be found [here](https://htmlpreview.github.io/?https://github.com/mozilla/experimenter/blob/main/app/experimenter/docs/swagger-ui.html)

## Contributing

Please see our [Contributing Guidelines](https://github.com/mozilla/experimenter/blob/main/contributing.md)

## License

Experimenter uses the [Mozilla Public License](https://www.mozilla.org/en-US/MPL/)