AWS EC2 インスタンスの状態を調べる

ec2_stat

#!/usr/bin/env ruby

require 'aws-sdk-ec2'
require 'thor'

class Ec2Stat < Thor
  default_command :stat

  desc :stat, 'show statuses of ec2 instances'
  option :profile, aliases: '-p', default: 'default'
  def stat
    # Class: Aws::EC2::Client — AWS SDK for Ruby V3
    # https://docs.aws.amazon.com/sdk-for-ruby/v3/api/Aws/EC2/Client.html

    client = Aws::EC2::Client.new(profile: profile)

    # https://docs.aws.amazon.com/sdk-for-ruby/v3/api/Aws/EC2/Client.html#describe_instances-instance_method
    response = client.describe_instances

    puts
    puts <<~EOS
        launch-time                name                  state                image-id               instance-id
    ------------------------------------------------------------------------------------------------------------------------
    EOS

    puts response.reservations.map {|reservation|
      instances = reservation.instances.select {|instance|
        instance.tags.any? {|tag|
          tag.key == 'Name' && tag.value =~ /^(production|staging)-.*$/
        }
      }

      instances.map {|instance|
        instance_id = instance.instance_id
        image_id = instance.image_id
        launch_time = instance.launch_time
        state = instance.state
        name = instance.tags.find {|tag| tag.key == 'Name' }.value

        format('    %-25s  %-20s  %-20s %-22s %s', launch_time.localtime, name, state.name, image_id, instance_id)
      }
    }.flatten.sort

    puts
  end

  no_commands do
    def profile
      options[:profile]
    end
  end
end

Ec2Stat.start