#If you are refering this gist, I would suggest to refer my blog post and Linode gem documentation 
# post url: https://pramodbshinde.wordpress.com/2016/10/01/spot-instances-with-linode
# gem url: https://github.com/rick/linode

class LinodeService
  #Replace following contacts as per your needs  
  PLAN_ID = 1  
  API_KEY = 'xyz' 
  DATACENTERS = {
    newark: 6,
    london: 7
  }

  SOURCE_LINODES = {
    london: 5679,
    newark: 1234
  }
  
  def initialize
    linode_client
  end
  
  #Clone new linode and boot
  def launch_linode
    @linode = clone
    boot
  end

  #Launching instance
  def clone
    @client.linode.clone(
      linodeid: SOURCE_LINODES[:london],
      datacenterid: DATACENTERS[:london],
      planid: PLAN_ID
    )
  end
  
  #Booting instance
  def boot
    @linode.boot(linodeid: @linode.linodeid)
  end

  ##Updating instance
  def update
    @client.linode.update(
      linodeid: @linode.linodeid,
      label: 'Instance' + '-' + @linode.linodeid.to_s,
      lpm_displaygroup: 'My Linodes'
    )
  end
  
  #Listing instances
  def list
    @client.linode.list
  end
  
  #Getting IP address of linode
  def ip_address
    data = @client.linode.ip.list(linodeid: @linode.linodeid)
    data.first.ipaddress
  end
  
  #Deleting instance
  def delete
    @linode.delete(linodeid: linodeid, skipChecks: true)
  end
  
  private
  
  def linode_client
    @client ||= Linode.new(api_key: API_KEY)
  end
end

service = LinodeService.new
service.launch_linode
service.ip_address
=> 209.123.234.161