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autoscale and related mods to use aws roles
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Stuart Eccles
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Feb 27, 2012
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,106 @@ | ||
| require 'fileutils' | ||
| require 'fog' | ||
| require 'json' | ||
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| require_relative "./utils" | ||
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| module AWS | ||
| class Autoscale | ||
| include Utils | ||
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| attr_accessor :autoscale_config, :stage, :application | ||
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| def initialize(stage = 'production', autoscale_config = {}, application = nil) | ||
| @autoscale_config = autoscale_config | ||
| @stage = stage | ||
| @application = application | ||
| end | ||
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| def create_ami_from_server(server_name, region, image_description = nil) | ||
| image_name = "#{server_name}-image-#{Time.now.strftime('%Y%m%d%H%M')}" if image_name.nil? | ||
| image_description = "Image of #{server_name} created at #{DateTime.now} by conan" | ||
| server_to_image = find_server_by_name(server_name, region) | ||
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| raise "Server #{server_name} in #{region} does not exist" if server_to_image.nil? | ||
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| compute = Fog::Compute.new(:provider => :aws, :region => region) | ||
| puts "Creating image #{image_name} from server #{server_name}" | ||
| ami_request = compute.create_image(server_to_image.id, image_name, image_description) | ||
| image_id = ami_request.body["imageId"] | ||
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| pending = true | ||
| image = nil | ||
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| puts "Waiting for #{image_id} to become available" | ||
| while pending | ||
| sleep 10 | ||
| image = compute.images.get(image_id) | ||
| pending = image.state == "pending" | ||
| end | ||
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| raise "Image creation failed" if image.state == 'failed' | ||
| image_id | ||
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| end | ||
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| def create_launch_config(name, config = {}) | ||
| new_conf = config.inject({}){|memo,(k,v)| memo[k.to_sym] = v; memo} | ||
| region = new_conf[:region] || "us-east-1" | ||
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| compute = Fog::Compute.new(:provider => :aws, :region => region) | ||
| default_key_name = compute.key_pairs.all.first.name | ||
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| default_params = { :instance_monitoring => true, | ||
| :instance_type => "m1.small", | ||
| :key_name => default_key_name | ||
| } | ||
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| params = default_params.merge(new_conf) | ||
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| if new_conf[:security_groups] and new_conf[:security_groups].size > 0 | ||
| params[:security_groups] = new_conf[:security_groups].collect { |g| "#{stage}-#{g}" } | ||
| else | ||
| params[:security_groups] = ["#{stage}-default"] | ||
| end | ||
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| if params[:server_to_image].nil? | ||
| params[:image_id] = default_image_id(region, params[:flavor_id], params[:root_device_type]) if params[:image_id].nil? | ||
| else | ||
| params[:image_id] = create_ami_from_server(params[:server_to_image], region) end | ||
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| autoscale = Fog::AWS::AutoScaling.new(:region => region) | ||
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| #need to create new launchconfiugrations with unique names | ||
| #because you can't modify them and you can't delete them if they are attached | ||
| #to an autoscale group | ||
| params[:id] = "#{ec2_name_tag(name)}-#{Time.now.strftime('%Y%m%d%H%M')}" | ||
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| puts "Creating Autoscale Launch Configuration #{params[:id]}" | ||
| lc = autoscale.configurations.create(params) | ||
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| params[:autoscale_groups].each do |group_name| | ||
| asg = autoscale.groups.get(group_name) | ||
| "Setting Autoscale Group #{group_name} to use Launch Configration #{params[:id]}" | ||
| asg.connection.update_auto_scaling_group(asg.id, {"LaunchConfigurationName" => params[:id]}) | ||
| end unless params[:autoscale_groups].nil? | ||
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| end | ||
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| def configure_autoscale | ||
| end | ||
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| def update_autoscale | ||
| autoscale_config.each do |type, resources| | ||
| case type | ||
| when "launch-config" | ||
| resources.each do |name, conf| | ||
| create_launch_config(name, conf) | ||
| end | ||
| end | ||
| end | ||
| end | ||
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| end | ||
| end | ||
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