Allow multiple repository storage shards to be enabled, and automatically round-robin between them

1 files changed, 29 insertions, 0 deletions

diff --git a/db/migrate/20161103171205_rename_repository_storage_column.rb b/db/migrate/20161103171205_rename_repository_storage_column.rb
new file mode 100644
index 00000000000..e9f992793b4
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+++ b/db/migrate/20161103171205_rename_repository_storage_column.rb
@@ -0,0 +1,29 @@
+# See http://doc.gitlab.com/ce/development/migration_style_guide.html
+# for more information on how to write migrations for GitLab.
+
+class RenameRepositoryStorageColumn < ActiveRecord::Migration
+  include Gitlab::Database::MigrationHelpers
+
+  # Set this constant to true if this migration requires downtime.
+  DOWNTIME = false
+
+  # When a migration requires downtime you **must** uncomment the following
+  # constant and define a short and easy to understand explanation as to why the
+  # migration requires downtime.
+  # DOWNTIME_REASON = ''
+
+  # When using the methods "add_concurrent_index" or "add_column_with_default"
+  # you must disable the use of transactions as these methods can not run in an
+  # existing transaction. When using "add_concurrent_index" make sure that this
+  # method is the _only_ method called in the migration, any other changes
+  # should go in a separate migration. This ensures that upon failure _only_ the
+  # index creation fails and can be retried or reverted easily.
+  #
+  # To disable transactions uncomment the following line and remove these
+  # comments:
+  # disable_ddl_transaction!
+
+  def change
+    rename_column :application_settings, :repository_storage, :repository_storages
+  end
+end