RubyUtils/db/migrations/0001_history.rb

Sequel.migration do
  change do
    create_table :somecolumns do
      primary_key :id
      column :host,       String, null: false
      column :port,       Integer
      column :updated_at, DateTime
      column :created_at, DateTime

      index :host
      index [:host, :port]
    end
  end
end