Remove Git circuit breaker

Was introduced in the time that GitLab still used NFS, which is not
required anymore in most cases. By removing this, the API it calls will
return empty responses. This interface has to be removed in the next
major release, expected to be 12.0.

1 files changed, 30 insertions, 0 deletions

diff --git a/db/post_migrate/20181008200441_remove_circuit_breaker.rb b/db/post_migrate/20181008200441_remove_circuit_breaker.rb
new file mode 100644
index 00000000000..838addb7286
--- /dev/null
+++ b/db/post_migrate/20181008200441_remove_circuit_breaker.rb
@@ -0,0 +1,30 @@
+# frozen_string_literal: true
+
+class RemoveCircuitBreaker < ActiveRecord::Migration
+  include Gitlab::Database::MigrationHelpers
+
+  # Set this constant to true if this migration requires downtime.
+  DOWNTIME = false
+
+  disable_ddl_transaction!
+
+  CIRCUIT_BREAKER_COLUMS_WITH_DEFAULT = {
+    circuitbreaker_failure_count_threshold: 3,
+    circuitbreaker_failure_reset_time: 1800,
+    circuitbreaker_storage_timeout: 15,
+    circuitbreaker_access_retries: 3,
+    circuitbreaker_check_interval: 1
+  }.freeze
+
+  def up
+    CIRCUIT_BREAKER_COLUMS_WITH_DEFAULT.keys.each do |column|
+      remove_column(:application_settings, column) if column_exists?(:application_settings, column)
+    end
+  end
+
+  def down
+    CIRCUIT_BREAKER_COLUMS_WITH_DEFAULT.each do |column, default|
+      add_column_with_default(:application_settings, column, :integer, default: default) unless column_exists?(:application_settings, column)
+    end
+  end
+end