Class: Awful::AutoScaling

Inherits:
Cli show all
Defined in:
lib/awful/auto_scaling.rb

Constant Summary collapse

COLORS = 
{
  ## lifecycle states
  Pending:     :yellow,
  InService:   :green,
  Terminating: :red,
  ## health statuses
  Healthy:     :green,
  Unhealthy:   :red,
  ## same for asg instances describe
  HEALTHY:     :green,
  UNHEALTHY:   :red,
  ## activity status
  Successful:   :green,
  Failed:      :red,
  Cancelled:   :red,
  ## instance state
  running:    :green,
  stopped:    :yellow,
  terminated: :red,
}

Instance Method Summary collapse

Methods inherited from Cli

#initialize

Constructor Details

This class inherits a constructor from Awful::Cli

Instance Method Details

#activities(name) ⇒ Object 



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# File 'lib/awful/auto_scaling.rb', line 364

def activities(name)
  autoscaling.describe_scaling_activities(auto_scaling_group_name: name).activities.output do |activities|
    if options[:long]
      print_table activities.map { |a| [color(a.status_code), a.description, a.start_time, a.end_time] }
    elsif options[:cause]
      print_table activities.map { |a| [color(a.status_code), a.description, a.start_time, a.end_time, "\n#{a.cause}\n\n"] }
    else
      puts activities.map(&:activity_id)
    end
  end
end

#attach(name, *instance_ids) ⇒ Object 



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# File 'lib/awful/auto_scaling.rb', line 287

def attach(name, *instance_ids)
  autoscaling.attach_instances(auto_scaling_group_name: name, instance_ids: instance_ids)
end

#create(file = nil) ⇒ Object 



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# File 'lib/awful/auto_scaling.rb', line 151

def create(file = nil)
  opt = load_cfg(options, file)
  whitelist = %i[auto_scaling_group_name launch_configuration_name instance_id min_size max_size desired_capacity default_cooldown availability_zones
                 load_balancer_names health_check_type health_check_grace_period placement_group vpc_zone_identifier termination_policies tags ]

  opt = remove_empty_strings(opt)
  opt = only_keys_matching(opt, whitelist)

  ## scrub aws-provided keys from tags
  opt[:tags] = opt.has_key?(:tags) ? opt[:tags].map { |tag| only_keys_matching(tag, %i[key value propagate_at_launch]) } : []

  autoscaling.create_auto_scaling_group(opt)
end

#delete(name) ⇒ Object 



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# File 'lib/awful/auto_scaling.rb', line 69

def delete(name)
  if yes? "Really delete auto-scaling group #{name}?", :yellow
    autoscaling.delete_auto_scaling_group(auto_scaling_group_name: name)
  end
end

#detach(name, *instance_ids) ⇒ Object 



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# File 'lib/awful/auto_scaling.rb', line 293

def detach(name, *instance_ids)
  autoscaling.detach_instances(auto_scaling_group_name: name, instance_ids: instance_ids, should_decrement_desired_capacity: options[:decrement])
end

#dump(name) ⇒ Object 



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# File 'lib/awful/auto_scaling.rb', line 137

def dump(name)
  all_matching_asgs(name).map(&:to_hash).output do |asgs|
    asgs.each do |asg|
      puts YAML.dump(stringify_keys(asg)) unless options[:quiet]
    end
  end
end

#enter_standby(name, *instance_ids) ⇒ Object 



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# File 'lib/awful/auto_scaling.rb', line 388

def enter_standby(name, *instance_ids)
  autoscaling.enter_standby(
    auto_scaling_group_name: name,
    instance_ids: instance_ids,
    should_decrement_desired_capacity: options[:decrement]
  )
end

#exit_standby(name, *instance_ids) ⇒ Object 



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# File 'lib/awful/auto_scaling.rb', line 397

def exit_standby(name, *instance_ids)
  autoscaling.exit_standby(auto_scaling_group_name: name, instance_ids: instance_ids)
end

#instances(*names) ⇒ Object 



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# File 'lib/awful/auto_scaling.rb', line 78

def instances(*names)
  instances = autoscaling.describe_auto_scaling_groups(auto_scaling_group_names: names).auto_scaling_groups.map(&:instances).flatten

  ## make extra call to get asg name as part of object
  if options[:describe]
    instances = autoscaling.describe_auto_scaling_instances(instance_ids: instances.map(&:instance_id)).auto_scaling_instances
  end

  instances.output do |list|
    if options[:long]
      print_table list.map { |i|
        [
          i.instance_id,
          options[:describe] ? i.auto_scaling_group_name : nil,
          i.availability_zone,
          color(i.lifecycle_state),
          color(i.health_status),
          i.launch_configuration_name,
        ].compact
      }
    else
      puts list.map(&:instance_id)
    end
  end
end

#ips(name) ⇒ Object 



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# File 'lib/awful/auto_scaling.rb', line 106

def ips(name)
  ## get instance IDs for matching ASGs
  ids = all_matching_asgs(name).map(&:instances).flatten.map(&:instance_id)

  ## get instance details for these IDs
  ec2.describe_instances(instance_ids: ids).map(&:reservations).flatten.map(&:instances).flatten.sort_by(&:launch_time).output do |instances|
    if options[:long]
      print_table instances.map { |i|
        [ i.public_ip_address, i.private_ip_address, i.instance_id, i.image_id, i.instance_type, i.placement.availability_zone, color(i.state.name), i.launch_time ]
      }
    else
      puts instances.map(&:public_ip_address)
    end
  end

end

#launch_configuration(*names) ⇒ Object 



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# File 'lib/awful/auto_scaling.rb', line 299

def launch_configuration(*names)
  autoscaling.describe_auto_scaling_groups(
    auto_scaling_group_names: names
  ).map(&:auto_scaling_groups).flatten.each_with_object({}) do |asg, h|
    h[asg.auto_scaling_group_name] = asg.launch_configuration_name
  end.output do |hash|
    if options[:long]
      print_table hash
    else
      puts hash.values
    end
  end
end

#ls(*names) ⇒ Object 



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# File 'lib/awful/auto_scaling.rb', line 48

def ls(*names)
  autoscaling.describe_auto_scaling_groups(auto_scaling_group_names: names).auto_scaling_groups.output do |asgs|
    if options[:long]
      print_table asgs.map { |a|
        [
          tag_name(a, '-')[0,40],
          a.auto_scaling_group_name[0,40],
          a.launch_configuration_name[0,40],
          "#{a.instances.length}/#{a.desired_capacity}",
          "#{a.min_size}-#{a.max_size}",
          a.availability_zones.map{ |az| az[-1,1] }.sort.join(','),
          a.created_time
        ]
      }
    else
      puts asgs.map(&:auto_scaling_group_name)
    end
  end
end

#old_instances(*names) ⇒ Object 



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# File 'lib/awful/auto_scaling.rb', line 320

def old_instances(*names)
  asgs = autoscaling.describe_auto_scaling_groups(auto_scaling_group_names: names).map(&:auto_scaling_groups).flatten

  ## get hash of old instances by ASG name
  olds = asgs.each_with_object({}) do |asg, hash|
    outdated = asg.instances.select do |instance|
      instance.launch_configuration_name != asg.launch_configuration_name
    end
    hash[asg.auto_scaling_group_name] = outdated unless outdated.empty?
  end

  if olds.empty?
  # noop
  elsif options[:detach]
    autoscaling.detach_instances(auto_scaling_group_name: name, instance_ids: olds.values.flatten.map(&:instance_id), should_decrement_desired_capacity: options[:decrement])
  elsif options[:deregister]
    asgs.select do |asg|
      olds.has_key?(asg.auto_scaling_group_name)
    end.each do |asg|
      instance_ids = olds[asg.auto_scaling_group_name].flatten.map(&:instance_id)
      asg.load_balancer_names.each do |elb_name|
        say "Deregistering #{instance_ids.join(',')} from ELB #{elb_name}", :yellow
        elb.deregister_instances_from_load_balancer(load_balancer_name: elb_name, instances: instance_ids.map { |id| {instance_id: id} })
      end
    end
  elsif options[:terminate]
    olds.values.flatten.map do |instance|
      autoscaling.terminate_instance_in_auto_scaling_group(instance_id: instance.instance_id, should_decrement_desired_capacity: options[:decrement] && true)
      instance.instance_id
    end.output { |ids| say("Terminated: #{ids.join(',')}", :yellow) }
  elsif options[:groups]
    puts olds.keys
  elsif options[:long]
    print_table olds.map { |asg, ins| ins.map { |i| [i.instance_id, asg, i.launch_configuration_name] }.flatten }
  else
    puts olds.values.flatten.map(&:instance_id)
  end

  olds
end

#processes ⇒ Object 



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# File 'lib/awful/auto_scaling.rb', line 255

def processes
  autoscaling.describe_scaling_process_types.processes.map(&:process_name).sort.output do |procs|
    puts procs
  end
end

#resume(name, *procs) ⇒ Object 



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# File 'lib/awful/auto_scaling.rb', line 278

def resume(name, *procs)
  if procs.empty?
    autoscaling.resume_processes(auto_scaling_group_name: name)
  else
    autoscaling.resume_processes(auto_scaling_group_name: name, scaling_processes: procs)
  end
end

#ssh(name, *args) ⇒ Object 



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# File 'lib/awful/auto_scaling.rb', line 127

def ssh(name, *args)
  ips = ips(name).map(&:public_ip_address)
  num = options[:all] ? ips.count : options[:number].to_i
   = options[:login_name] ? "-l #{options[:login_name]}" : ''
  ips.last(num).each do |ip|
    system "ssh #{} #{ip} #{Array(args).join(' ')}"
  end
end

#stop(name, num = 1) ⇒ Object 



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# File 'lib/awful/auto_scaling.rb', line 245

def stop(name, num = 1)
  ins = options[:newest] ? newest(name) : oldest(name)
  ins.first(num.to_i).map(&:instance_id).output do |ids|
    if yes? "Really stop #{num} instances: #{ids.join(',')}?", :yellow
      ec2.stop_instances(instance_ids: ids)
    end
  end
end

#suspend(name, *procs) ⇒ Object 



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# File 'lib/awful/auto_scaling.rb', line 263

def suspend(name, *procs)
  if options[:list]
    autoscaling.describe_auto_scaling_groups(
      auto_scaling_group_names: Array(name)
    ).map(&:auto_scaling_groups).flatten.first.suspended_processes.output do |list|
      print_table list.map{ |proc| [ proc.process_name, proc.suspension_reason] }
    end
  elsif procs.empty?
    autoscaling.suspend_processes(auto_scaling_group_name: name)
  else
    autoscaling.suspend_processes(auto_scaling_group_name: name, scaling_processes: procs)
  end
end

#terminate(name, num = 1) ⇒ Object 



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# File 'lib/awful/auto_scaling.rb', line 224

def terminate(name, num = 1)
  ins = options[:newest] ? newest(name) : oldest(name)
  num = ins.length if options[:all] # all instances if requested

  if ins.empty?
    say 'No instances to terminate.', :green
  else
    ids = ins.first(num.to_i).map(&:instance_id)
    if yes? "Really terminate #{num} instances: #{ids.join(',')}?", :yellow
      ids.each do |id|
        puts "Terminating instance: #{id}"
        autoscaling.terminate_instance_in_auto_scaling_group(instance_id: id, should_decrement_desired_capacity: options[:decrement] && true)
      end
    else
      puts 'Nothing terminated'
    end
  end
end

#update(name, file = nil) ⇒ Object 



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# File 'lib/awful/auto_scaling.rb', line 170

def update(name, file = nil)
  opt = load_cfg(options, file)

  ## allow matching by group name or name tag, but ensure we get only one
  asgs = all_matching_asgs(name)
  if asgs.length < 1
    warn "no match for #{name}"
    return
  elsif asgs.length > 1
    warn "ambiguous match for #{name}:", asgs.map(&:auto_scaling_group_name)
    return
  end

  ## cleanup the group options
  opt[:auto_scaling_group_name] = asgs.first.auto_scaling_group_name
  opt = remove_empty_strings(opt)

  ## update the group
  whitelist = %i[auto_scaling_group_name launch_configuration_name min_size max_size desired_capacity default_cooldown availability_zones
                 health_check_type health_check_grace_period placement_group vpc_zone_identifier termination_policies ]
  autoscaling.update_auto_scaling_group(only_keys_matching(opt, whitelist))

  ## update any tags
  if opt[:tags]
    tags = opt[:tags].map { |tag| tag.merge(resource_id: name, resource_type: 'auto-scaling-group') }
    autoscaling.create_or_update_tags(tags: tags)
  end
end

#wait(*instance_ids) ⇒ Object 



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# File 'lib/awful/auto_scaling.rb', line 379

def wait(*instance_ids)
  until instance_lifecycle_state(*instance_ids).all?{ |s| s == options[:state] }
    puts "waiting for #{instance_ids.count} instances to enter state #{options[:state]}" unless options[:quiet]
    sleep options[:period]
  end
end