App SRE Unleash

Feature toggle as a service - Powered by Unleash

Server

The Unleash Feature Toggle Service gets all its configurations from environment variables. Here's the description of the variables that have to be provided:

Database:

• DATABASE_NAME: The database to use backing this instance.
• DATABASE_HOST: The database hostname or ip address.
• DATABASE_USERNAME: The database username.
• DATABASE_PASSWORD: The database password.

Keycloak:

• KC_HOST: The Keycloak url.
• KC_REALM: The Keycloak realm.
• KC_CLIENT_ID: The Keycloak client id.
• KC_CLIENT_SECRET: The Keycloak client secret.
• KC_ADMIN_ROLES: The Keycloak admin roles, separated by comma.
• KC_EDITOR_ROLES: The Keycloak editor roles, separated by comma.
• KC_VIEWER_ROLES: The Keycloak viewer roles, separated by comma.

API Access:

• INIT_ADMIN_API_TOKENS: The Admin API token that admins have to authenticate with. This is a comma separated list of tokens, format.
• INIT_CLIENT_API_TOKENS: The Client API token that clients have to authenticate with. This is a comma separated list of tokens, format. Should include tokens for 3 environments (default, develement, production).

Running Locally

Install

$ npm install --production

Run

$ node index.js

Running with Docker

Build

$ docker build -t unleash .

Run

$ docker run --rm -d -p 4242:4242 unleash

Running with Docker Compose

Run

Copy .env.example to .env.

$ docker-compose up --build

Default users can be found in unleash-users-0.json, password is unleash.

API

Client

Unleash provides an API client.

Install:

$ pip install UnleashClient

Example:

from UnleashClient import UnleashClient


headers = {'Authorization': CLIENT_ACCESS_TOKEN}

client = UnleashClient(url="http://localhost:4242/api",
                       app_name="My App",
                       custom_headers=headers)

client.initialize_client()

if client.is_enabled("quay-mirror"):
    print('quay-mirror toogle is enabled!')

client.destroy()

Admin

There's no client for the Admin API. Let's use requests then.

Install:

$ pip install requests

Example:

import requests

headers = {'Authorization': ADMIN_ACCESS_TOKEN}

data = {"enabled": False,
        "strategies": [{"name": "default"}]}

res = requests.put('http://localhost:4242/api/admin/features/quay-mirror',
                   headers=headers, json=data)

res.raise_for_status()