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# Aviator
[![Build Status](https://travis-ci.org/aviator/aviator.png?branch=master)](https://travis-ci.org/aviator/aviator)
[![Coverage Status](https://coveralls.io/repos/aviator/aviator/badge.png?branch=master)](https://coveralls.io/r/aviator/aviator?branch=master)
[![Code Climate](https://codeclimate.com/github/aviator/aviator.png)](https://codeclimate.com/github/aviator/aviator)
[![Gem Version](https://badge.fury.io/rb/aviator.png)](http://badge.fury.io/rb/aviator)
[![Dependency Status](https://gemnasium.com/aviator/aviator.png)](https://gemnasium.com/aviator/aviator)
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A lightweight library for communicating with the OpenStack API.
## Installation
Add this line to your application's Gemfile:
gem 'aviator'
Or if you want to live on the edge:
gem 'aviator', :git => 'git@github.com:aviator/aviator.git', :branch => 'develop'
And then execute:
$ bundle
Or install it yourself as:
$ gem install aviator
## Usage
```ruby
require 'aviator'
# Create a new session. See 'Configuration' below for the config file format.
session = Aviator::Session.new(
config_file: 'path/to/aviator.yml',
environment: :production,
log_file: 'path/to/aviator.log'
)
# Authenticate against the auth service specified in :config_file. If no
# credentials are available in the config file, this line will throw an error.
session.authenticate
# You can re-authenticate anytime. Note that this creates a new token in the
# underlying environment while the old token is discarded by the Session object.
# Be aware of this fact as it might unnecessarily generate too many tokens.
#
# Notice how you can override the credentials in the config file. Also note that
# the keys used below (:username, :password, :tenantName) match the name as
# indicated in the official OpenStack documentation.
session.authenticate do |credentials|
credentials[:username] = myusername
credentials[:password] = mypassword
credentials[:tenantName] = tenantName
end
# Serialize the session information for caching. The output is in plaintext JSON which
# contains sensitive information. You are responsible for securing that.
str = session.dump
# Create a new Session object from a session dump. This DOES NOT create a new token.
# If you employed any form of encryption on the string, make sure to decrypt it first!
session = Aviator::Session.load(str)
# In some instances, Session::load is inefficient because it creates a new session object
# each time. In a web app environment, for instance, having to destroy and recreate the
# session object can take its toll on performance. In such a scenario, use Session#load
# (instance method, as opposed to class method). This will 'infect' an already existing
# session object with the supplied session dump and return itself instead of creating
# a brand new session object.
session.load(other_session_dump)
# Depending on how old the loaded session dump is, its session data may already be expired.
# Check if it's still current by calling Session#validate and reauthenticate as needed.
#
# IMPORTANT: The validator must be defined in the config file and it must refer to the
# name of a request that is known to Aviator. See 'Configuration' below for examples
session.authenticate unless session.validate
# If you want the newly created session to log its output, make sure to indicate it on load
session = Aviator::Session.load(str, log_file: 'path/to/aviator.log')
# Get a handle to the Identity Service.
keystone = session.identity_service
# Create a new tenant
response = keystone.request(:create_tenant) do |params|
params[:name] = 'Project'
params[:description] = 'My Project'
params[:enabled] = true
end
# Aviator uses parameter names as defined in the official OpenStack API doc. You can
# also access the params via dot notation (e.g. params.description) or by using a string
# for a hash key (e.g. params['description']). However, keep in mind that OpenStack
# parameters that have dashes and other characters that are not valid for method names
# and symbols can only be expressed as strings. E.g. params['changes-since']
# Be explicit about the endpoint type. Useful in those rare instances when
# the same request name means differently depending on the endpoint type.
# For example, in OpenStack, :list_tenants will return only the tenants the
# user is a member of in the public endpoint whereas the admin endpoint will
# return all tenants in the system.
response = keystone.request(:list_tenants, endpoint_type: 'admin')
```
## Configuration
The configuration file is a simple YAML file that can have one or more environment definitions.
```
production:
provider: openstack
auth_service:
name: identity
host_uri: http://my.openstackenv.org:5000
request: create_token
validator: list_tenants # Request to make for validating the session
api_version: v2 # Optional if version is indicated in host_uri
auth_credentials:
username: admin
password: mypassword
tenantName: myproject
development_1:
provider: openstack
auth_service:
name: identity
host_uri: http://devstack:5000/v2.0
request: create_token
validator: list_tenants
auth_credentials:
tokenId: 2c963f5512d067b24fdc312707c80c7a6d3d261b
tenantName: admin
development_2:
provider: openstack
auth_service:
name: identity
host_uri: http://devstack:5000/v2.0
request: create_token
validator: list_tenants
auth_credentials:
username: admin
password: mypassword
tenantName: myproject
```
A note on the validator: it can be any request as long as
1. It is defined in Aviator
1. Does not require any parameters
1. It returns an HTTP status 200 or 203 to indicate auth info validity.
1. It returns any other HTTP status to indicate that the auth info is invalid.
## CLI tools
List available providers. Includes only OpenStack for now.
```bash
$ aviator describe
```
List available services for OpenStack.
```bash
$ aviator describe openstack
```
List available requests for Keystone
```bash
$ aviator describe openstack identity
```
Describe Keystone's create_tenant request
```bash
$ aviator describe openstack identity v2 admin create_tenant
```
The last command above will display:
```bash
Request: create_tenant
Parameters:
(required) description
(required) enabled
(required) name
Sample Code:
session.identity_service.request(:create_tenant, endpoint_type: 'admin') do |params|
params['name'] = value
params['description'] = value
params['enabled'] = value
end
Links:
documentation:
http://docs.openstack.org/api/openstack-identity-service/2.0/content/
```
## Contributing
1. Fork it
2. Create your feature branch (`git checkout -b my-new-feature`)
3. Commit your changes (`git commit -am 'Add some feature'`)
4. Push to the branch (`git push origin my-new-feature`)
5. Create new Pull Request