Deploy to opsworks via rake

deploy_to_opsworks.rake

# Put this into lib/tasks

require 'rubygems'
require 'bundler'
require 'aws-sdk'
require 'socket'
require 'os'

if Rails.env.development?

namespace :opsworks do
  # Authenticate to AWS, region must be us-east-1, it's the only endpoint for OpsWorks right now.
  # aws_secrets.yml must contain the keys access_key_id and secret_access_key
  AWS.config(YAML.load_file('config/aws_secrets.yml').merge(region: 'us-east-1'))
  # config/opsworks.yml looks like:
  # layer_id: 'c8acf-xxxxxxxxxxxxxxxx'
  # app_id: '7280-xxxxxx'
  opsworks = YAML.load_file('config/opsworks.yml')
  client = AWS::OpsWorks.new.client
  if OS.mac?
    whoami = `osascript -e "long user name of (system info)"`.strip
  else
    whoami = `whoami`.strip
  end
  hostname = Socket.gethostname

    desc 'Deploy this app to AWS Opsworks'
    task :deploy do

      deploy_opts = {}
      deploy_opts[:command] = {name: 'deploy'}

      deploy_opts[:instance_ids] = []
      deploy_opts[:app_id]   = opsworks['app_id']
      deploy_opts[:comment]  = "rake deploy from #{whoami} on #{hostname}"

      instances = client.describe_instances({layer_id: opsworks['layer_id']})

      next if instances.nil? || instances.empty?

      # Capture the details for each 'online' instance
      instances[:instances].each do |instance|
        if 'online' == instance[:status]
          deploy_opts[:instance_ids] << instance[:instance_id]
          deploy_opts[:stack_id] = instance[:stack_id]
        end
      end

      puts "Deploying to #{deploy_opts[:instance_ids].count} instances"
      deploy = client.create_deployment deploy_opts
      puts "Deployment ID is: #{deploy[:deployment_id]}"
      puts "Check status via:"
      puts "rake opsworks:deploy_status[#{deploy[:deployment_id]}]"
    end

    desc 'Deploy this app to AWS Opsworks'
    task :deploy_status, [:d_id] do |t, args|
      raise '*** Usage: rake opsworks:deploy_status[a2b45-...opsworks_deployment_id]' if args[:d_id].nil?
      r = client.describe_deployments(deployment_ids: [args[:d_id]])[:deployments].first
      puts "Deployment #{r[:deployment_id]}:"
      puts "- Status: #{r[:status]}"
      puts "- Created: #{DateTime.parse(r[:created_at])}"
      puts "- Completed: #{DateTime.parse(r[:completed_at])}" if r[:completed_at]
      puts "- Duration: #{r[:duration]}" if r[:duration]
      puts "- Comment: #{r[:comment]}" if r[:comment]
    end

  end

end

This looks neat. Instead of a yaml file, I would probably standardize on the environment variables AWS uses for all their cli tools.