Migrate EE jobs from Sidetiq to Sidekiq-cron

app/workers/historical_data_worker.rb

 class HistoricalDataWorker
   include Sidekiq::Worker
-  include Sidetiq::Schedulable
-
-  recurrence { daily.hour_of_day(12) }
   def perform
     HistoricalData.track!

app/workers/ldap_sync_worker.rb

 class LdapSyncWorker
   include Sidekiq::Worker
-  include Sidetiq::Schedulable
   sidekiq_options retry: false
-  if Gitlab.config.ldap.enabled
-    DAILY = Gitlab.config.ldap.schedule_sync_daily
-    HOUR = Gitlab.config.ldap.schedule_sync_hour
-    MINUTE = Gitlab.config.ldap.schedule_sync_minute
-
-    recurrence { daily(DAILY).hour_of_day(HOUR).minute_of_hour(MINUTE) }
-  end
-
   def perform
     Rails.logger.info "Performing daily LDAP sync task."
     User.ldap.find_each(batch_size: 100).each do |ldap_user|

app/workers/update_all_mirrors_worker.rb

 class UpdateAllMirrorsWorker
   include Sidekiq::Worker
-  include Sidetiq::Schedulable
-
-  recurrence { hourly }
   def perform
     Project.mirror.each(&:update_mirror)

config/gitlab.yml.example

@@ -170,13 +170,10 @@ production: &base
   ldap:
     enabled: false
-    # GitLab EE only.
-    # In addition to refreshing users when they log in,
-    # enabling this setting will refresh LDAP user membership once a day.
-    # Default time of the day when this will happen is at 1:30am server time.
-    schedule_sync_daily: 1 # Run once every X days. Default: 1, meaning 'daily'
-    schedule_sync_hour: 1 # Hour of the day. Value from 0-23.
-    schedule_sync_minute: 30 # Minute of the hour. Value from 0-59.
+    #
+    # Gitlab EE only:
+    # Since Gitlab 8.3, LDAP refresh job execution can be configured in schedule.yml
+    #
     servers:
       ##########################################################################

config/initializers/sidekiq.rb

@@ -21,7 +21,7 @@ Sidekiq.configure_server do |config|
   # Sidekiq-cron: load recurring jobs from schedule.yml
   schedule_file = 'config/schedule.yml'
   if File.exists?(schedule_file)
-    Sidekiq::Cron::Job.load_from_hash YAML.load_file(schedule_file)
+    Sidekiq::Cron::Job.load_from_hash YAML.load(ERB.new(File.read(schedule_file)).result)
   end
 end

config/schedule.yml

@@ -8,3 +8,27 @@ stuck_ci_builds_worker:
   cron: "0 0 * * *"
   class: "StuckCiBuildsWorker"
   queue: "default"
+
+#
+# GitLab EE only jobs:
+#
+
+historical_data_worker:
+  cron: "0 12 * * *"
+  class: "HistoricalDataWorker"
+  queue: "default"
+
+update_all_mirrors_worker:
+  cron: "0 * * * *"
+  class: "UpdateAllMirrorsWorker"
+  queue: "default"
+
+<% if Gitlab.config.ldap.enabled %>
+# In addition to refreshing users when they log in,
+# enabling this setting will refresh LDAP user membership once a day.
+# Default time of the day when this will happen is at 1:30am server time.
+ldap_sync_worker:
+  cron: "30 1 * * *"
+  class: "LdapSyncWorker"
+  queue: "default"
+<% end %>