Add existing circuitbreaker settings to the database

changelogs/unreleased/bvl-circuitbreaker-improvements.yml

+---
+title: Store circuitbreaker settings in the database instead of config
+merge_request: 14842
+author:
+type: changed

db/migrate/20171012101043_add_circuit_breaker_properties_to_application_settings.rb

+# See http://doc.gitlab.com/ce/development/migration_style_guide.html
+# for more information on how to write migrations for GitLab.
+
+class AddCircuitBreakerPropertiesToApplicationSettings < ActiveRecord::Migration
+  include Gitlab::Database::MigrationHelpers
+
+  DOWNTIME = false
+
+  def change
+    add_column :application_settings,
+               :circuitbreaker_failure_count_threshold,
+               :integer,
+               default: 160
+    add_column :application_settings,
+               :circuitbreaker_failure_wait_time,
+               :integer,
+               default: 30
+    add_column :application_settings,
+               :circuitbreaker_failure_reset_time,
+               :integer,
+               default: 1800
+    add_column :application_settings,
+               :circuitbreaker_storage_timeout,
+               :integer,
+               default: 30
+  end
+end

db/schema.rb

@@ -11,7 +11,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 20171006091000) do
+ActiveRecord::Schema.define(version: 20171012101043) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"
@@ -134,6 +134,10 @@ ActiveRecord::Schema.define(version: 20171006091000) do
     t.boolean "hashed_storage_enabled", default: false, null: false
     t.boolean "project_export_enabled", default: true, null: false
     t.boolean "auto_devops_enabled", default: false, null: false
+    t.integer "circuitbreaker_failure_count_threshold", default: 160
+    t.integer "circuitbreaker_failure_wait_time", default: 30
+    t.integer "circuitbreaker_failure_reset_time", default: 1800
+    t.integer "circuitbreaker_storage_timeout", default: 30
   end
 
   create_table "audit_events", force: :cascade do |t|