Fix migrations

db/migrate/20180831164904_fix_prometheus_metric_query_limits.rb

@@ -7,6 +7,8 @@ require Rails.root.join('db/migrate/prometheus_metrics_limits_to_mysql')
 class FixPrometheusMetricQueryLimits < ActiveRecord::Migration
   include Gitlab::Database::MigrationHelpers
 
+  DOWNTIME = false
+
   def up
     PrometheusMetricsLimitsToMysql.new.up
   end

lib/tasks/migrate/add_limits_mysql.rake

@@ -3,6 +3,7 @@ require Rails.root.join('db/migrate/markdown_cache_limits_to_mysql')
 require Rails.root.join('db/migrate/merge_request_diff_file_limits_to_mysql')
 require Rails.root.join('db/migrate/limits_ci_build_trace_chunks_raw_data_for_mysql')
 require Rails.root.join('db/migrate/gpg_keys_limits_to_mysql')
+require Rails.root.join('db/migrate/prometheus_metrics_limits_to_mysql')
 
 desc "GitLab | Add limits to strings in mysql database"
 task add_limits_mysql: :environment do
@@ -12,4 +13,5 @@ task add_limits_mysql: :environment do
   MergeRequestDiffFileLimitsToMysql.new.up
   LimitsCiBuildTraceChunksRawDataForMysql.new.up
   IncreaseMysqlTextLimitForGpgKeys.new.up
+  PrometheusMetricsLimitsToMysql.new.up
 end