Class: Awful::Ec2

Inherits:
Cli show all
Defined in:
lib/awful/ec2.rb

Constant Summary collapse

COLORS = 
{
  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

#addresses ⇒ Object 



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# File 'lib/awful/ec2.rb', line 170

def addresses
  ec2.describe_addresses.map(&:addresses).flatten.map do |ip|
    [ ip.allocation_id, ip.public_ip, ip.instance_id, ip.domain ]
  end.output do |list|
    print_table list
  end
end

#allocate ⇒ Object 



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# File 'lib/awful/ec2.rb', line 156

def allocate
  ec2.allocate_address(domain: 'vpc').first.output do |eip|
    puts eip.allocation_id, eip.public_ip
  end
end

#associate(name, eip) ⇒ Object 



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# File 'lib/awful/ec2.rb', line 163

def associate(name, eip)
  ec2.associate_address(instance_id: find_instance(name), allocation_id: eip).map(&:association_id).output do |id|
    puts id
  end
end

#az ⇒ Object 



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# File 'lib/awful/ec2.rb', line 145

def az
  ec2.describe_availability_zones.availability_zones.output do |zones|
    if options[:long]
      print_table zones.map { |z| [z.zone_name, z.state, z.messages.join(',')] }
    else
      puts zones.map(&:zone_name)
    end
  end
end

#create(name) ⇒ Object 



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# File 'lib/awful/ec2.rb', line 93

def create(name)
  opt = load_cfg.merge(symbolize_keys(options))
  whitelist = %i[image_id min_count max_count key_name security_group_ids user_data instance_type kernel_id
                 ramdisk_id  monitoring subnet_id disable_api_termination instance_initiated_shutdown_behavior
                 additional_info iam_instance_profile ebs_optimized network_interfaces]

  opt[:min_count] ||= 1
  opt[:max_count] ||= 1
  opt[:monitoring] = {enabled: opt.fetch(:monitoring, {}).fetch(:state, '') == 'enabled'}

  ## set subnet from human-readable name, either for network interface, or instance-level
  if opt[:subnet]
    subnet = find_subnet(opt[:subnet])
    opt[:network_interfaces] ? (opt[:network_interfaces][0][:subnet_id] = subnet) : (opt[:subnet_id] = subnet)
  end

  (opt[:tags] = opt.fetch(:tags, [])).find_index { |t| t[:key] == 'Name' }.output do |index|
    opt[:tags][index || 0] = {key: 'Name', value: name}
  end

  ## TODO: block_device_mappings
  ## TODO: placement

  opt[:security_group_ids] = opt.fetch(:security_groups, []).map { |sg| sg[:group_id] }
  opt[:user_data] = Base64.strict_encode64(opt[:user_data]) if opt[:user_data]

  # scrub unwanted fields from a copied instance dump
  opt = remove_empty_strings(opt)

  ## start instance
  response = ec2.run_instances(only_keys_matching(opt, whitelist))
  ids = response.instances.map(&:instance_id)
  ec2.create_tags(resources: ids, tags: opt[:tags]) # tag instances
  puts ids # report new instance ids

  ## wait for instance to enter running state
  puts 'running instance ...'
  ec2.wait_until(:instance_running, instance_ids: ids)

  ## allocate and associate new elastic IPs
  ids.map { |id| associate(id, allocate.allocation_id) } if opt[:elastic_ip]

  ## report DNS or IP for instance
  ec2.describe_instances(instance_ids: ids).map(&:reservations).flatten.map(&:instances).flatten.map do |instance|
    instance.public_dns_name or instance.public_ip_address or instance.private_ip_address
  end.output do |list|
    puts list
  end
end

#delete(name) ⇒ Object 



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# File 'lib/awful/ec2.rb', line 232

def delete(name)
  id =
    if name.match(/^i-[\d[a-f]]{8,17}$/)
      name
    else
      ec2.describe_instances.map(&:reservations).flatten.map(&:instances).flatten.find do |instance|
        tag_name(instance) == name and not %w[terminated shutting-down].include?(instance.state.name)
      end.instance_id
    end
  if yes? "Really terminate instance #{name} (#{id})?", :yellow
    ec2.terminate_instances(instance_ids: Array(id))
  end
end

#dns(name) ⇒ Object 



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# File 'lib/awful/ec2.rb', line 179

def dns(name)
  ec2.describe_instances.map(&:reservations).flatten.map(&:instances).flatten.find do |instance|
    instance.instance_id == name or (n = tag_name(instance) and n.match(name))
  end.public_dns_name.output do |dns|
    puts dns
  end
end

#dump(name) ⇒ Object 



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# File 'lib/awful/ec2.rb', line 81

def dump(name)
  ec2.describe_instances.map(&:reservations).flatten.map(&:instances).flatten.find do |instance|
    instance.instance_id == name or tag_name(instance) == name
  end.output do |instance|
    puts YAML.dump(stringify_keys(instance.to_hash))
  end
end

#ls(name = nil) ⇒ Object 



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# File 'lib/awful/ec2.rb', line 32

def ls(name = nil)
  params = {instance_ids: [], filters: []}

  ## filter by ids
  options[:ids].each do |id|
    params[:instance_ids] << id
  end

  ## filter by arbitrary tags
  options[:tags].each do |tag|
    key, value = tag.split(/[:=]/)
    params[:filters] << {name: "tag:#{key}", values: [value]}
  end

  ## filter shortcuts for stack, resource, autoscaling group
  params[:filters] << {name: 'tag:aws:cloudformation:stack-name', values: [options[:stack]]}       if options[:stack]
  params[:filters] << {name: 'tag:aws:cloudformation:logical-id', values: [options[:resource]]}    if options[:resource]
  params[:filters] << {name: 'tag:aws:autoscaling:groupName',     values: [options[:autoscaling]]} if options[:autoscaling]
  params[:filters] << {name: 'instance-state-name',               values: [options[:state]]}       if options[:state]

  ## get list of instances
  instances = ec2.describe_instances(params.reject{ |k,v| v.empty? }).reservations.map(&:instances).flatten

  ## filter by Name tag as a regex
  instances.select! { |i| tag_name(i, '').match(name) } if name

  ## output
  instances.output do |list|
    if options[:long]
      print_table list.map { |i|
        [
          tag_name(i, ''),
          i.instance_id,
          i.instance_type,
          i.image_id,
          i.placement.availability_zone,
          color(i.state.name),
          i.security_groups.map(&:group_name).join(',').slice(0..30),
          i.private_ip_address,
          i.public_ip_address
        ]
      }.sort_by(&:first)
    else
      puts list.map(&:instance_id)
    end
  end
end

#start(name) ⇒ Object 



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# File 'lib/awful/ec2.rb', line 223

def start(name)
  ec2.describe_instances.map(&:reservations).flatten.map(&:instances).flatten.find do |instance|
    instance.instance_id == name or (n = tag_name(instance) and n == name)
  end.instance_id.output do |id|
    ec2.start_instances(instance_ids: Array(id))
  end
end

#stop(name) ⇒ Object 



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# File 'lib/awful/ec2.rb', line 212

def stop(name)
  ec2.describe_instances.map(&:reservations).flatten.map(&:instances).flatten.find do |instance|
    instance.instance_id == name or (n = tag_name(instance) and n == name)
  end.instance_id.output do |id|
    if yes? "Really stop instance #{name} (#{id})?", :yellow
      ec2.stop_instances(instance_ids: Array(id))
    end
  end
end

#user_data(name) ⇒ Object 



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# File 'lib/awful/ec2.rb', line 201

def user_data(name)
  ec2.describe_instances.map(&:reservations).flatten.map(&:instances).flatten.find do |instance|
    instance.instance_id == name or tag_name(instance) == name
  end.output do |instance|
    ec2.describe_instance_attribute(instance_id: instance.instance_id, attribute: 'userData').user_data.value.output do |user_data|
      puts Base64.strict_decode64(user_data)
    end
  end
end