Freight¶

Requirements¶

If you’re not using Heroku, you’ll need to ensure a few server dependencies:

• Redis
• PostgreSQL
• Python 2.7
• Node.js

Dependencies¶

Freight contains dependencies both from Python (for the API and workers) and JavaScript (for the frontend). We recommend using a virtualenv, but we’re not going to cover that in our quickstart guide.

Start by installing Python dependencies:

python setup.py develop

And then install the JavaScript dependencies:

npm install

Configuration¶

Configuration can be managed either via a Python file, or selectively via environment variables. Generally there are sane defaults available where appropriate, though many things are install-specific.

If you’re using a configuration file you’ll need to pass it with FREIGHT_CONF environment variable:

FREIGHT_CONF=/tmp/freight.conf.py bin/web

The following values should be configured:

API_KEY¶

The API key clients will use to communicate with Freight.

SSH_PRIVATE_KEY¶

The SSH private key required for cloning repositories (newlines replaced with \n). This will also be made available to providers as a file-system resource.

DEFAULT_TIMEOUT¶

The default timeout for deploys.

curlish https://api.github.com/authorizations \
    -u your-username \
    -X POST \
    -J scopes='repo' \
    -J note='freight'

Bootstrap the Database¶

If you haven’t already, create a new database for Freight:

createdb -E utf-8 freight

Now apply Freight’s migrations:

bin/upgrade

Webserver¶

At this point you should have a working installation. To test this, launch the webserver:

bin/web

You should then be able to access the frontend: http://localhost:5000

Creating an Application¶

With the webserver online, you should be able to access the API. The first thing you’ll need to do is create an application:

curlish http://localhost:5000/api/0/apps/ \
    -H 'Authorization: Key 3e84744ab2714151b1db789df82b41c0021958fe4d77406e9c0947c34f5c5a70' \
    -X POST \
    -J repository=git@github.com:my-organization/example.git \
    -J name=example \
    -J provider=shell \
    -J provider_config='{"command": "bin/fab -a -i {ssh_key} -R {environment} {task}:sha={sha}"}'

We’ve created a new application named “example” using the shell provider.

The important part here is our provider configuration:

{
    "command": "bin/fab -a -i {ssh_key} -R {environment} {task}:sha={sha}"
}

The command we’re passing is simply a wrapper around Fabric:

#!/bin/bash

# Usage: bin/fab [arguments]
# Wrapper around Fabric which ensures any required dependencies are installed.

pip install fabric pytz
fab $@

Creating a new Deploy¶

Once we’ve configured our application we can create a new deploy:

curlish http://localhost:5000/api/0/tasks/ \
    -H 'Authorization: Key 3e84744ab2714151b1db789df82b41c0021958fe4d77406e9c0947c34f5c5a70' \
    -X POST \
    -J app=example \
    -J ref=master \
    -J task=deploy \
    -J user="user@example.com"

In our response we’ll get back the task summary which simply notes its pending and gives you it’s ID:

{
  "id": "1",
  "status": "pending"
}

Monitoring a Deploy¶

While Freight intends to provide a feature-rich frontend, it’s fundamentally an API-driven application.

For example, to get the status of a deploy:

curlish http://localhost:5000/api/0/tasks/1/ \
    -H 'Authorization: Key 3e84744ab2714151b1db789df82b41c0021958fe4d77406e9c0947c34f5c5a70'

Additionally you can access the logs via the API:

curlish http://localhost:5000/api/0/tasks/1/log/?offset=-1&limit=1000 \
  -H 'Authorization: Key 3e84744ab2714151b1db789df82b41c0021958fe4d77406e9c0947c34f5c5a70'

Rolling Back¶

While Freight doesn’t formally offer a first-class rollback control, you can tell it to deploy the previous stable:

curlish http://localhost:5000/api/0/tasks/ \
    -H 'Authorization: Key 3e84744ab2714151b1db789df82b41c0021958fe4d77406e9c0947c34f5c5a70' \
    -X POST \
    -J app=example \
    -J ref=:previous \
    -J task=deploy \
    -J user="user@example.com"

Setting up Slack notifications¶

First of all, head to Slack and create a “webhook” integration.

curlish https://scurri-freight-test.herokuapp.com/api/0/apps/1/ \
    -H 'Authorization: Key 3e84744ab2714151b1db789df82b41c0021958fe4d77406e9c0947c34f5c5a70' \
    -X POST \
    -J notifiers='[{"type":"slack", "config": {"webhook_url": "https://hooks.slack.com/services/XXX/YYY/ZZZ"}}]'

Setting up Github checks¶

In this case, only the CircleCI checks will be considered.

curlish https://scurri-freight-test.herokuapp.com/api/0/apps/1/ \
    -H 'Authorization: Key 3e84744ab2714151b1db789df82b41c0021958fe4d77406e9c0947c34f5c5a70' \
    -X POST \
    -J checks='[{"type": "github", "config": {"contexts": ["ci/circleci"], "repo": "my-organization/example"}}]'

Next Steps¶

To learn more about other checks/notifiers, we recommend diving into the code.

Freight License¶

Apache License

Version 2.0, January 2004

http://www.apache.org/licenses/

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