server list looks like something

web/db/migrate/20160220084417_create_servers.rb

@@ -0,0 +1,12 @@
+class CreateServers < ActiveRecord::Migration
+  def change
+    create_table :servers do |t|
+      t.string :name, null: false
+      t.string :namehash, null: false
+      t.integer :operating_system_id, null: false
+      t.boolean :initialized, null: false, default: false
+      t.string :hostname
+      t.timestamps null: false
+    end
+  end
+end

web/db/migrate/20160220091225_create_operating_systems.rb

@@ -0,0 +1,8 @@
+class CreateOperatingSystems < ActiveRecord::Migration
+  def change
+    create_table :operating_systems do |t|
+      t.string :name, null: false
+      t.timestamps null: false
+    end
+  end
+end