Class: EC2::Ec2Instance

Inherits:
Object
  • Object
show all
Defined in:
lib/etude_for_aws/ec2/ec2_instance.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(ec2, instance_id = nil) ⇒ Ec2Instance

Returns a new instance of Ec2Instance.



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# File 'lib/etude_for_aws/ec2/ec2_instance.rb', line 5

def initialize(ec2,instance_id=nil)
  @config = ec2.config
  @gateway = ec2.gateway
  script = ''
  @encoded_script = Base64.encode64(script)
  @image_id = @config.image_id
  @instance_type = @config.instance_type
  @min_count = @config.min_count
  @max_count = @config.max_count
  @instance_tags = @config.instance_tags
  @instance_id = instance_id
end

Instance Attribute Details

#instance_id ⇒ Object (readonly)

Returns the value of attribute instance_id.



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# File 'lib/etude_for_aws/ec2/ec2_instance.rb', line 3

def instance_id
  @instance_id
end

Instance Method Details

#create(security_group, key_pair) ⇒ Object 



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# File 'lib/etude_for_aws/ec2/ec2_instance.rb', line 18

def create(security_group,key_pair)
  instance = @gateway.create_instances(@image_id,
                              @min_count,
                              @max_count,
                              key_pair.key_pair_name,
                              security_group,
                              @encoded_script,
                              @instance_type,
                              @config)

  instance.empty? ? @instance_id = nil : @instance_id = instance.first.id
  @gateway.wait_for_instance_status_ok(@instance_id)
  instance.create_tags({tags: @instance_tags})
  instance
end

#reboot ⇒ Object 



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# File 'lib/etude_for_aws/ec2/ec2_instance.rb', line 92

def reboot
  i = @gateway.find_instance_by_id(@instance_id)

  if i.exists?
    case i.state.code
      when 48  # terminated
        puts "#{instance_id} is terminated, so you cannot reboot it"
      else
        puts "#{instance_id} is rebooting"
        i.reboot
        @gateway.wait_for_instance_status_ok(instance_id)
    end
  end
end

#start ⇒ Object 



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# File 'lib/etude_for_aws/ec2/ec2_instance.rb', line 50

def start
  i = @gateway.find_instance_by_id(@instance_id)

  unless i.nil?
    if i.exists?
      case i.state.code
        when 0  # pending
          puts "#{instance_id} is pending, so it will be running in a bit"
        when 16  # started
          puts "#{instance_id} is already started"
        when 48  # terminated
          puts "#{instance_id} is terminated, so you cannot start it"
        else
          puts "#{instance_id} is starting"
          i.start
          @gateway.wait_for_instance_running(instance_id)
      end
    end
  end
end

#stop ⇒ Object 



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# File 'lib/etude_for_aws/ec2/ec2_instance.rb', line 71

def stop
  i = @gateway.find_instance_by_id(@instance_id)

  unless i.nil?
    if i.exists?
      case i.state.code
        when 48  # terminated
          puts "#{instance_id} is terminated, so you cannot stop it"
        when 64  # stopping
          puts "#{instance_id} is stopping, so it will be stopped in a bit"
        when 89  # stopped
          puts "#{instance_id} is already stopped"
        else
          puts "#{instance_id} is stopping"
          i.stop
          @gateway.wait_for_instance_stopped(instance_id)
      end
    end
  end
end

#terminate ⇒ Object 



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# File 'lib/etude_for_aws/ec2/ec2_instance.rb', line 34

def terminate
  i = @gateway.find_instance_by_id(@instance_id)

  unless i.nil?
    if i.exists?
      case i.state.code
        when 48 # terminated
          puts "#{@instance_id} is already terminated"
        else
          i.terminate
          @gateway.wait_for_instance_terminated(@instance_id)
      end
    end
  end
end