Create geo_node_group_links table

db/migrate/20170717213940_create_geo_node_group_links.rb

+class CreateGeoNodeGroupLinks < ActiveRecord::Migration
+  include Gitlab::Database::MigrationHelpers
+
+  DOWNTIME = false
+
+  def change
+    create_table :geo_node_group_links do |t|
+      t.references :geo_node, index: true, foreign_key: { on_delete: :cascade }, null: false
+      t.integer :group_id, index: true, null: false
+    end
+
+    add_timestamps_with_timezone :geo_node_group_links
+
+    add_foreign_key :geo_node_group_links, :namespaces, column: :group_id, on_delete: :cascade
+  end
+end

db/schema.rb

@@ -633,6 +633,16 @@ ActiveRecord::Schema.define(version: 20170803130232) do
 
   add_index "geo_event_log", ["repository_updated_event_id"], name: "index_geo_event_log_on_repository_updated_event_id", using: :btree
 
+  create_table "geo_node_group_links", force: :cascade do |t|
+    t.integer "geo_node_id", null: false
+    t.integer "group_id", null: false
+    t.datetime "created_at", null: false
+    t.datetime "updated_at", null: false
+  end
+
+  add_index "geo_node_group_links", ["geo_node_id"], name: "index_geo_node_group_links_on_geo_node_id", using: :btree
+  add_index "geo_node_group_links", ["group_id"], name: "index_geo_node_group_links_on_group_id", using: :btree
+
   create_table "geo_nodes", force: :cascade do |t|
     t.string "schema"
     t.string "host"
@@ -1974,6 +1984,8 @@ ActiveRecord::Schema.define(version: 20170803130232) do
   add_foreign_key "geo_event_log", "geo_repository_deleted_events", column: "repository_deleted_event_id", name: "fk_c4b1c1f66e", on_delete: :cascade
   add_foreign_key "geo_event_log", "geo_repository_renamed_events", column: "repository_renamed_event_id", name: "fk_86c84214ec", on_delete: :cascade
   add_foreign_key "geo_event_log", "geo_repository_updated_events", column: "repository_updated_event_id", on_delete: :cascade
+  add_foreign_key "geo_node_group_links", "geo_nodes", on_delete: :cascade
+  add_foreign_key "geo_node_group_links", "namespaces", column: "group_id", on_delete: :cascade
   add_foreign_key "geo_repository_renamed_events", "projects", on_delete: :cascade
   add_foreign_key "geo_repository_updated_events", "projects", on_delete: :cascade
   add_foreign_key "index_statuses", "projects", name: "fk_74b2492545", on_delete: :cascade