Rackspace::Scaling

This gem aims to provide a relatively simple library to increase your number of servers in a rackspace cloud and, optionally, attach those servers to a load balancer. This gem is pretty low level in relation to the API, and doesn't abstract away much.

Detailed information about the API can be found here:

http://docs.rackspace.com/servers/api/v2/cs-devguide/content/ch_api_operations.html
http://docs.rackspace.com/loadbalancers/api/v1.0/clb-devguide/content/API_Operations-d1e1354.html

There are also official rackspace gems that provide the same functionality available here:

https://github.com/rackspace/ruby-cloudlb
https://github.com/rackspace/ruby-cloudservers

I didn't know these gems existed when I started work on this project :(

Installation

Add this line to your application's Gemfile:

gem 'rackspace-scaling'

And then execute:

$ bundle

Or install it yourself as:

$ gem install rackspace-scaling

Usage

Api

The very first thing you need to do is get an authentication token.

auth = Rackspace::Scaling::Authentication.new('account_name', 'api_key')

You can then perform operations for servers or load balancers.

Load Balancers

lb = Rackspace::Scaling::LoadBalancerOperation.new(auth, 'DFW')

#list all load balancers
puts lb.list

#list all nodes attached to a load balancer
puts lb.nodes(12345)

#Add a node to a load balancer, defaults to port 80, can be overriden with the :port option
puts lb.add_node(:load_balancer_id => 12345, :node_ip => 'internal or external ip')

#remove a node
puts lb.remove_node(:load_balancer_id => 12345, :node_id => 67890)

Servers

srv = Rackspace::Scaling::ServerOperation.new(auth, 'DFW')

# lists all the available images you can create servers with
srv.list_images

#list flavours (sizes) of machines you can spin up
srv.list_flavors

#get the status for a specific instance
srv.status('server guid')

#create a new server, required parameters are :image_id, :flavor_id, and :name
puts = srv.create(:flavor_id => '2', :image_id => 'guid', :name => 'fooserver')

#destroy a server
puts srv.destroy('server-guid')

Command-LIne

You can either increase or decrease the number of servers you have running.

Scale Up

rackspace_scale_up --api-key myapikey --login mylogin -l 12345 -i server-image-name -n 2

Scale Down

rackspace_scale_down --api-key myapikey --login mylogin -l 12345 -n 2

Contributing

Fork it
Create your feature branch (git checkout -b my-new-feature)
Commit your changes (git commit -am 'Added some feature')
Push to the branch (git push origin my-new-feature)
Create new Pull Request