Add wildcard and domain_type to pages_domains

In preparation for serverless domain support. All serverless domains
are required to be wildcard domains, and will not work with the existing
LetsEncrypt verification process.

A serverless domain can be configured on instance, group, or project
levels, so domain_type will store what level it is configured on.

app/models/pages_domain.rb

@@ -6,6 +6,7 @@ class PagesDomain < ApplicationRecord
   SSL_RENEWAL_THRESHOLD = 30.days.freeze
 
   enum certificate_source: { user_provided: 0, gitlab_provided: 1 }, _prefix: :certificate
+  enum domain_type: { instance: 0, group: 1, project: 2 }, _prefix: :domain_type
 
   belongs_to :project
   has_many :acme_orders, class_name: "PagesDomainAcmeOrder"

db/migrate/20191127221608_add_wildcard_and_domain_type_to_pages_domains.rb

+# frozen_string_literal: true
+
+class AddWildcardAndDomainTypeToPagesDomains < ActiveRecord::Migration[5.2]
+  include Gitlab::Database::MigrationHelpers
+
+  DOWNTIME = false
+  PROJECT_TYPE = 2
+
+  disable_ddl_transaction!
+
+  def up
+    add_column_with_default :pages_domains, :wildcard, :boolean, default: false
+    add_column_with_default :pages_domains, :domain_type, :integer, limit: 2, default: PROJECT_TYPE
+  end
+
+  def down
+    remove_column :pages_domains, :wildcard
+    remove_column :pages_domains, :domain_type
+  end
+end

db/migrate/20191206022133_add_indexes_to_pages_domains_on_wildcard_and_domain_type.rb

+# frozen_string_literal: true
+
+class AddIndexesToPagesDomainsOnWildcardAndDomainType < ActiveRecord::Migration[5.2]
+  include Gitlab::Database::MigrationHelpers
+
+  DOWNTIME = false
+
+  disable_ddl_transaction!
+
+  def up
+    add_concurrent_index :pages_domains, :wildcard
+    add_concurrent_index :pages_domains, :domain_type
+  end
+
+  def down
+    remove_concurrent_index :pages_domains, :wildcard
+    remove_concurrent_index :pages_domains, :domain_type
+  end
+end

db/schema.rb

@@ -2929,13 +2929,17 @@ ActiveRecord::Schema.define(version: 2019_12_08_071112) do
     t.datetime_with_timezone "certificate_valid_not_before"
     t.datetime_with_timezone "certificate_valid_not_after"
     t.integer "certificate_source", limit: 2, default: 0, null: false
+    t.boolean "wildcard", default: false, null: false
+    t.integer "domain_type", limit: 2, default: 2, null: false
     t.index ["certificate_source", "certificate_valid_not_after"], name: "index_pages_domains_need_auto_ssl_renewal", where: "(auto_ssl_enabled = true)"
     t.index ["domain"], name: "index_pages_domains_on_domain", unique: true
+    t.index ["domain_type"], name: "index_pages_domains_on_domain_type"
     t.index ["project_id", "enabled_until"], name: "index_pages_domains_on_project_id_and_enabled_until"
     t.index ["project_id"], name: "index_pages_domains_on_project_id"
     t.index ["remove_at"], name: "index_pages_domains_on_remove_at"
     t.index ["verified_at", "enabled_until"], name: "index_pages_domains_on_verified_at_and_enabled_until"
     t.index ["verified_at"], name: "index_pages_domains_on_verified_at"
+    t.index ["wildcard"], name: "index_pages_domains_on_wildcard"
   end
 
   create_table "path_locks", id: :serial, force: :cascade do |t|