Class: Aws::RiKanjoo::Calc

Inherits:
Object
  • Object
show all
Defined in:
lib/aws/rikanjo/calc.rb

Direct Known Subclasses

Base

Instance Method Summary collapse

Instance Method Details

#calc_year_cost ⇒ Object 



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# File 'lib/aws/rikanjo/calc.rb', line 27

def calc_year_cost
  om_hr_price = @om_info[:hr_price].to_f
  ri_hr_price = @ri_info[@ri_util][:hr_price].to_f
  upfront    = @ri_info[@ri_util][:upfront].to_f

  om_day_paid = (om_hr_price * 24).to_f
  ri_day_paid = (ri_hr_price * 24).to_f

  sum_om_price = om_day_paid
  sum_ri_price = ri_day_paid + upfront
  365.times.each do |d|
    d += 1
    sum_om_price += om_day_paid
    sum_ri_price += ri_day_paid

    if sum_ri_price < sum_om_price
      @ri_info[@ri_util].store(:sweet_spot_price, sum_ri_price.round(2))
      @ri_info[@ri_util].store(:sweet_spot_start_day, d)
      break
    end
  end
  total_om_price = (om_day_paid * 365).round(2)
  @om_info.store(:yr_price, total_om_price)
  total_ri_price = ((ri_day_paid * 365) + upfront).round(2)
  @ri_info[@ri_util].store(:yr_price, total_ri_price)

  # exp. @om_info = {:hr_price=>"0.350", :yr_price=>3066.0}
  # exp. @ri_info = {"ri_util"=>{:upfront=>"NNN", :hr_price=>"NNN",
  #                  :sweet_spot_price=>NNN, :sweet_spot_start_day=>78, :yr_price=>2074.56}}
  return @om_info, @ri_info
end

#om_get_hr_price ⇒ Object 



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# File 'lib/aws/rikanjo/calc.rb', line 10

def om_get_hr_price
   # TODO: merge om and ri
  uri = URI.parse("#{@mode.price_url}/#{@mode.om_price_file}")
  contents = Net::HTTP.get(uri)

  # parse om info
  @om_info = @mode.om_price_from_contents(contents)
end

#ri_get_hr_price_and_upfront ⇒ Object 



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# File 'lib/aws/rikanjo/calc.rb', line 19

def ri_get_hr_price_and_upfront
  uri = URI.parse("#{@mode.price_url}/#{@mode.ri_price_file}")
  contents = Net::HTTP.get(uri)

  # parse ri info
  @ri_info = @mode.ri_price_from_contents(contents)
end

#total_cost_year ⇒ Object 



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# File 'lib/aws/rikanjo/calc.rb', line 59

def total_cost_year
  om_get_hr_price
  ri_get_hr_price_and_upfront
  calc_year_cost

  discount_per = (100 - ((@ri_info[@ri_util][:yr_price] / @om_info[:yr_price]) * 100)).round(2)

  # If the Reserved Instance does not become cheaper than the On-demand Instance.
  if @ri_info[@ri_util][:sweet_spot_start_day].nil?
    message = {
      "Price of the Reserved Instance is higher than the price of On-Demand Instances." => nil,
      "region"                       => "#{@region}",
      "instance_type"                => "#{@instance_type}",
      "ri_util"                      => "#{@ri_util}",
      "discont percent (percent)"    => "#{discount_per}",
      "ondemand hour price (doller)" => "#{@om_info[:hr_price]}",
      "reserved hour price (doller)" => "#{@ri_info[@ri_util][:hr_price]}",
      "ondemand year price (doller)" => "#{@om_info[:yr_price]}",
      "reserved year price (doller)" => "#{@ri_info[@ri_util][:yr_price]}",
      "reserved upfront (doller)"    => "#{@ri_info[@ri_util][:upfront]}",
    }
    puts message.to_json
    exit 1
  end

  sweet_spot_date = Date.today + @ri_info[@ri_util][:sweet_spot_start_day]
  message = {
    "region"                       => "#{@region}",
    "instance_type"                => "#{@instance_type}",
    "ri_util"                      => "#{@ri_util}",
    "discont percent (percent)"    => "#{discount_per}",
    "ondemand hour price (doller)" => "#{@om_info[:hr_price]}",
    "reserved hour price (doller)" => "#{@ri_info[@ri_util][:hr_price]}",
    "ondemand year price (doller)" => "#{@om_info[:yr_price]}",
    "reserved year price (doller)" => "#{@ri_info[@ri_util][:yr_price]}",
    "reserved upfront (doller)"    => "#{@ri_info[@ri_util][:upfront]}",
    "sweet spot day (day)"         => "#{@ri_info[@ri_util][:sweet_spot_start_day]}",
    "sweet spot date (date)"       => "#{sweet_spot_date}",
    "sweet spot price (doller)"    => "#{@ri_info[@ri_util][:sweet_spot_price]}",
  }
  return message
end