Class: Vector::CLI

Inherits:
Object
  • Object
show all
Defined in:
lib/vector/cli.rb

Instance Method Summary collapse

Constructor Details

#initialize(argv) ⇒ CLI

Returns a new instance of CLI.



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# File 'lib/vector/cli.rb', line 9

def initialize(argv)
  @argv = argv
end

Instance Method Details

#run ⇒ Object 



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# File 'lib/vector/cli.rb', line 13

def run
  load_config

  auto_scaling = AWS::AutoScaling.new(:region => @config[:region])
  cloudwatch = AWS::CloudWatch.new(:region => @config[:region])

  # everything we do should be fine looking at a snapshot in time,
  # so memoizing should be fine when acting as a CLI.
  AWS.start_memoizing

  groups = if @config[:fleet]
             auto_scaling.fleets[@config[:fleet]].groups
           else
             @config[:groups].map do |group_name|
               auto_scaling.groups[group_name]
             end
           end

  ps = nil
  if @config[:predictive_scaling][:enabled]
    psconf = @config[:predictive_scaling]
    ps = Vector::Function::PredictiveScaling.new(
      { :cloudwatch => cloudwatch }.merge(psconf))
  end

  fds = nil
  if @config[:flexible_down_scaling][:enabled]
    fdsconf = @config[:flexible_down_scaling]
    fds = Vector::Function::FlexibleDownScaling.new(
      { :cloudwatch => cloudwatch }.merge(fdsconf))
  end

  groups.each do |group|
    begin
      ps_check_procs = nil

      if ps
        ps_result = ps.run_for(group)
        ps_check_procs = ps_result[:check_procs]

        if ps_result[:triggered]
          # Don't need to evaluate for scaledown if we triggered a scaleup
          next
        end
      end

      if fds
        fds.run_for(group, ps_check_procs)
      end

    rescue => e
      puts "error for #{group.name}: #{e.inspect}\n#{e.backtrace.join "\n"}"
    end
  end
end