Squashed commit of the following:add-background-migration-for-legacy-traces

commit 8ea114e5c349ad23f7293cf8141798aa6c9384e3
Author: Shinya Maeda <shinya@gitlab.com>
Date:   Fri Aug 17 13:32:14 2018 +0900

    Remove redandant parentheses

commit 3eb34f9305980701f0c1528f95fd615c1ca4d50d
Merge: 24308e4d1da 46494f46a13
Author: Shinya Maeda <shinya@gitlab.com>
Date:   Fri Aug 17 13:22:05 2018 +0900

    Merge branch 'master-ce' into add-background-migration-for-legacy-traces

commit 24308e4d1dab6fbf8437afc56fff7b83cc7ce534
Author: Shinya Maeda <shinya@gitlab.com>
Date:   Thu Aug 16 16:39:20 2018 +0900

    Fix spec

commit 5a63312d1b36296440da6a874bb667b7dc06869c
Author: Shinya Maeda <shinya@gitlab.com>
Date:   Thu Aug 16 14:46:59 2018 +0900

    Format SQL in MIgrateLegacyArtifacts class

commit 8894196d2aa2f9bf153cb03fef9603858478db70
Author: Shinya Maeda <shinya@gitlab.com>
Date:   Thu Aug 16 14:31:18 2018 +0900

    Remove unnecessary index

commit d9753ac058fc48c8f594ee90064f675f7a869b17
Author: Shinya Maeda <shinya@gitlab.com>
Date:   Thu Aug 16 14:24:20 2018 +0900

    Decouple pertial index to a different migration file

commit 1ce4a9bec6a4f0f981f4139c1a146ca7d887e6ba
Author: Shinya Maeda <shinya@gitlab.com>
Date:   Thu Aug 16 14:14:03 2018 +0900

    Simplified adding file_location column

commit 47b101fae914470dc4d048f6d33c509ec8270656
Author: Shinya Maeda <shinya@gitlab.com>
Date:   Thu Aug 16 14:11:42 2018 +0900

    Remove add_column_with_default

commit 80ec4f774f50bbf66e65f283f8fba541c6334e1c
Author: Shinya Maeda <shinya@gitlab.com>
Date:   Thu Aug 16 14:02:46 2018 +0900

    Simplified job_artifact_uploader

commit d835dab36e85f4fc7a7d0735ede0f0ea081178bf
Author: Shinya Maeda <shinya@gitlab.com>
Date:   Thu Aug 16 13:59:03 2018 +0900

    Elaborate comments on `file_location`

commit 6e78f23683bbae1372783f19179206369d7fbae7
Merge: fcef07ef361 79fdfec51fa
Author: Shinya Maeda <shinya@gitlab.com>
Date:   Thu Aug 16 13:39:28 2018 +0900

    Merge branch 'master-ce' into add-background-migration-for-legacy-traces

commit fcef07ef361080823432071722897321b2dd8354
Merge: 1eac3083194 bf9fd9c3fc3
Author: Shinya Maeda <shinya@gitlab.com>
Date:   Fri Jul 6 21:46:22 2018 +0900

    Merge branch 'master' into add-background-migration-for-legacy-traces

commit 1eac30831947cceec7610be6acc7d3bffadaf617
Author: Shinya Maeda <shinya@gitlab.com>
Date:   Fri Jul 6 21:45:49 2018 +0900

    Use SQL instead of strip_heredoc

commit 08b17e517722e1e4ef8b60e753d53d697953a293
Merge: c0f48ff243d dc478a82432
Author: Shinya Maeda <shinya@gitlab.com>
Date:   Thu Jul 5 23:20:37 2018 +0900

    Merge branch 'master' into add-background-migration-for-legacy-traces

commit c0f48ff243ddbe8af6c63aa0170538717191f44a
Author: Shinya Maeda <shinya@gitlab.com>
Date:   Thu Jul 5 17:37:40 2018 +0900

    Fix flaky spec

commit d082dab7cb456f9b31e76f49d1db46b606ba13ce
Merge: 8d6059d08ff 116955c4533
Author: Shinya Maeda <shinya@gitlab.com>
Date:   Thu Jul 5 17:35:06 2018 +0900

    Merge branch 'master' into add-background-migration-for-legacy-traces

commit 8d6059d08fffaa99689afe32b66d93b538fb62f2
Author: Shinya Maeda <shinya@gitlab.com>
Date:   Wed Jul 4 21:39:09 2018 +0900

    Fix static analysys failure

commit c4bdb18d582c520723a73c4c90c522332fa94d36
Author: Shinya Maeda <shinya@gitlab.com>
Date:   Wed Jul 4 20:16:16 2018 +0900

    Cleanup spec

commit 469e826429feb6a8ce66eb5d5e087f7182eb8813
Author: Shinya Maeda <shinya@gitlab.com>
Date:   Wed Jul 4 19:09:12 2018 +0900

    Clean up migrate_legacy_artifacts spec

commit dee84be650ad5afc9f18ac05eccb0736e4b1c121
Author: Shinya Maeda <shinya@gitlab.com>
Date:   Wed Jul 4 18:13:19 2018 +0900

    Set default value at the database level

commit b32cb2f8a7e03238cf97d90f9e05ca11b5c8b687
Merge: 83f7c970ad8 4c1a2a9b997
Author: Shinya Maeda <shinya@gitlab.com>
Date:   Wed Jul 4 17:06:02 2018 +0900

    Merge branch 'master' into add-background-migration-for-legacy-traces

commit 83f7c970ad821f1b52999398070facf59f320479
Merge: 823629c1d9a 275fbf24b18
Author: Shinya Maeda <shinya@gitlab.com>
Date:   Tue Jul 3 18:39:36 2018 +0900

    Merge branch 'master' into add-background-migration-for-legacy-traces

commit 823629c1d9aac5e7dcfb6bc393557a72ca3370b4
Author: Shinya Maeda <shinya@gitlab.com>
Date:   Mon Jul 2 14:59:54 2018 +0900

    Decouple background migrations of filling nullified file_locations

commit 42ec60e8a74478c62962f5c66abfbe3e908d9e49
Author: Shinya Maeda <shinya@gitlab.com>
Date:   Mon Jul 2 14:46:38 2018 +0900

    Unify partial index migrations

commit c145e9306419f704b14e2a92f51a9cf2d105f7e7
Author: Shinya Maeda <shinya@gitlab.com>
Date:   Mon Jul 2 14:24:14 2018 +0900

    Make file_location non-null values

commit a442456f6a83327b2736f49b9522084b5675d129
Merge: c2cafa1051c 3cf683629e6
Author: Shinya Maeda <shinya@gitlab.com>
Date:   Mon Jul 2 13:16:29 2018 +0900

    Merge branch 'master' into add-background-migration-for-legacy-traces

commit c2cafa1051cb7a4582c93b653e0ef3506ee11af4
Merge: 8e5f4f88410 e38db196598
Author: Shinya Maeda <shinya@gitlab.com>
Date:   Thu Jun 28 17:13:48 2018 +0900

    Merge branch 'master' into add-background-migration-for-legacy-traces

commit 8e5f4f884107c0f574545f043fbacea2698ef3a4
Author: Shinya Maeda <shinya@gitlab.com>
Date:   Wed Jun 27 18:54:03 2018 +0900

    Remove unneccesary specs

commit 86c1c68b1000770fcf8086fa71801b332fb6df5a
Author: Shinya Maeda <shinya@gitlab.com>
Date:   Wed Jun 27 18:05:36 2018 +0900

    Add a partial index on ci_builds.id for legacy artifacts search

commit 70aa08c89bb6cd9b12d38b64cbf1838fb919c30f
Merge: 37801122986 292cf668905
Author: Shinya Maeda <shinya@gitlab.com>
Date:   Wed Jun 27 17:15:33 2018 +0900

    Merge branch 'master' into add-background-migration-for-legacy-traces

commit 378011229864c1e056cf995444f947f6b352172c
Author: Shinya Maeda <shinya@gitlab.com>
Date:   Thu Jun 7 14:18:00 2018 +0900

    Clean up migration code. Defining migration custom class in  only post migration file which requires it for each_batch

commit 5cfe73318b91f377897e9fc50d67145093846459
Author: Shinya Maeda <shinya@gitlab.com>
Date:   Wed Jun 6 23:57:03 2018 +0900

    Remove indexing for mysql. with_legacy_artifacts targets all archive rows. Enhance tests.

commit 696c030d4a1ae2e1ee5e0eac771e574191fcb477
Author: Shinya Maeda <shinya@gitlab.com>
Date:   Wed Jun 6 19:59:35 2018 +0900

    Fix static analysys. Split methods. Use `file_types`

commit 86217c650c99d86d5b329229799f250f2ac5fbf6
Author: Shinya Maeda <shinya@gitlab.com>
Date:   Wed Jun 6 18:55:15 2018 +0900

    Use raw sql for better readability

commit df449404cb167edd61af1e59ca24f25db0a9ca9f
Author: Shinya Maeda <shinya@gitlab.com>
Date:   Wed Jun 6 17:47:39 2018 +0900

    Revert unneccesary change

commit 764977a1d98b34e34fcd229fca72c9595d62861a
Author: Shinya Maeda <shinya@gitlab.com>
Date:   Wed Jun 6 16:09:14 2018 +0900

    Remove AddIndexToCiBuildsArtifactsFile. Add temporary index in background migration class.

commit 7728ab3f9dba0af21033e1ca3b0213cacaef85d8
Author: Shinya Maeda <shinya@gitlab.com>
Date:   Wed Jun 6 15:28:50 2018 +0900

    Try to explicitly separate with postgresql and mysql for addin index

commit b95b47b965413f6590bd7eb38e34b4ef88cd2002
Author: Shinya Maeda <shinya@gitlab.com>
Date:   Wed Jun 6 14:29:18 2018 +0900

    Dry up code by referring `BackgroundMigration` namespace. Use `BETWEEN` raw SQL to make the edge case explicit.

commit 5b404e46e2a7c0d5a49b9745a8d985a80c9e380a
Author: Shinya Maeda <shinya@gitlab.com>
Date:   Wed Jun 6 14:15:37 2018 +0900

    Use `store_path` to make spec more explicit

commit 9f80de8e5aed49aae148278b0d27273e92ddbf25
Author: Shinya Maeda <shinya@gitlab.com>
Date:   Wed Jun 6 14:03:26 2018 +0900

    Use length not limit

commit f78503f3e55cc08d78274767b9381631201262e0
Author: Shinya Maeda <shinya@gitlab.com>
Date:   Wed Jun 6 13:48:51 2018 +0900

    Add length back for indexing

commit b96a57d5e5c7d2a97a1926ec95d67f0a2a1b8c93
Author: Shinya Maeda <shinya@gitlab.com>
Date:   Tue Jun 5 12:42:14 2018 +0000

    Update schema.rb

commit 9c25acc9752e5cf87f4062dc9f33fb609e8fb7be
Author: Shinya Maeda <shinya@gitlab.com>
Date:   Tue Jun 5 12:40:48 2018 +0000

    Add the guard clause in #down method too

commit 2bd5dadbd1b742d15bfb0914ad1be7e2182c1755
Author: Shinya Maeda <shinya@gitlab.com>
Date:   Tue Jun 5 19:41:08 2018 +0900

    Add a gurad caluse to block adding concurrent index for mysql

commit 9a5e12768ed30f75dd796d7c70f54b5e78aaa746
Author: Shinya Maeda <shinya@gitlab.com>
Date:   Tue Jun 5 19:20:33 2018 +0900

    Specify length of index in schema.rb manually for resolving mysql errors

commit c0ec68af02706d3c01b20b9f589113a900ff2071
Author: Shinya Maeda <shinya@gitlab.com>
Date:   Tue Jun 5 17:51:40 2018 +0900

    Separate add_concurrent_index by database type

commit b5f4ed37d9f49719fd8235a7069bb93f3c73c2dc
Author: Shinya Maeda <shinya@gitlab.com>
Date:   Tue Jun 5 17:30:19 2018 +0900

    Fix length size to use TEXT

commit b38b56056f4de384e32ee9acfbf161397de079fd
Author: Shinya Maeda <shinya@gitlab.com>
Date:   Tue Jun 5 17:20:35 2018 +0900

    Fix schema version for background migration spec

commit 32c48ef7cba61ceb285c6c7c1f48964a204dff20
Author: Shinya Maeda <shinya@gitlab.com>
Date:   Tue Jun 5 16:22:00 2018 +0900

    Specify length of indexed column. (This is neccessary for TEXT type)

commit a2e975f2e610ffd5f7f400b29a77d6b337005f1d
Author: Shinya Maeda <shinya@gitlab.com>
Date:   Tue Jun 5 15:13:42 2018 +0900

    Fix spec; migrate_legacy_artifacts_to_job_artifacts_spec.rb

commit c78c1e3f127b947e46a007bec2d56e0f3a55d7fa
Author: Shinya Maeda <shinya@gitlab.com>
Date:   Mon Jun 4 20:15:23 2018 +0900

    Separate add_concurrent_index migration from background migration

commit ad55e33bc2cd622b19f78ace64a69c18870d62df
Author: Shinya Maeda <shinya@gitlab.com>
Date:   Mon Jun 4 19:59:14 2018 +0900

    Revert "Remove index_exists? guard"

    This reverts commit d76807838cf06e023b608c16426174a752a8ccf5.

commit b2693be76fb2d643058f7f0fffd0d75ef13c38f0
Author: Shinya Maeda <shinya@gitlab.com>
Date:   Mon Jun 4 17:11:47 2018 +0900

    Remove index_exists? guard

commit a2eb053d3b3bd8c8ad49958d58b7225658214a72
Author: Shinya Maeda <shinya@gitlab.com>
Date:   Mon Jun 4 15:41:54 2018 +0900

    Wrap insertion and deletion in a single transaction

commit d4bb2c709ce549eb5d7382c03390bfdf6ec90297
Author: Shinya Maeda <shinya@gitlab.com>
Date:   Mon Jun 4 15:08:17 2018 +0900

    Add temporary index to ci_builds.artifacts_file to speed up SELECT query

commit 33d62be9ee72a5ee4a61a7bc793df84ea7e85730
Author: Shinya Maeda <shinya@gitlab.com>
Date:   Mon May 28 17:31:38 2018 +0900

    Add test for legacy path proxy

commit 57ab71a05b464dc4f477837f237eb15e8e51bb84
Author: Shinya Maeda <shinya@gitlab.com>
Date:   Mon May 28 15:59:36 2018 +0900

    Optimize queries. Add some tests for filtering logic.

commit 8f24dfaac70bc564973bd81745b80421f1a3e1af
Author: Shinya Maeda <shinya@gitlab.com>
Date:   Mon May 28 15:30:38 2018 +0900

    Fix static analysis

commit ccc60ddd6076f997f63f46cad814e4ac9e4cbdfc
Author: Shinya Maeda <shinya@gitlab.com>
Date:   Thu May 24 16:51:59 2018 +0900

    Add changelog

commit fdbdb07a40a8343e8292e618f90658e77cc2115e
Author: Shinya Maeda <shinya@gitlab.com>
Date:   Thu May 24 16:50:55 2018 +0900

    Add spec for migrations

commit 04886af8724258f9971798adcf3eacd5716f20df
Author: Shinya Maeda <shinya@gitlab.com>
Date:   Thu May 24 14:48:31 2018 +0900

    Revise comments

commit 55bcbee0576b5ac08b4ed461b85d059e0c670159
Author: Shinya Maeda <shinya@gitlab.com>
Date:   Thu May 24 14:40:29 2018 +0900

    Revise comments

commit db6628675abfe24cc10e682a65bf87ca02504deb
Author: Shinya Maeda <shinya@gitlab.com>
Date:   Tue May 15 17:27:12 2018 +0900

    Add spec base (Not finished)

commit e92dcc392eb4ad5aac06a3510a5879a3f084b9ee
Author: Shinya Maeda <shinya@gitlab.com>
Date:   Tue May 15 17:26:49 2018 +0900

    Added artifacts_metadata_store to remove in background migration

commit 91388399d80b58a831b21e6582d5f5ab29e785c7
Author: Shinya Maeda <shinya@gitlab.com>
Date:   Tue May 15 17:26:20 2018 +0900

    Add a condition to exclude jobs which have job_artifacts already

commit e084ce1181d07d0799714eee058d6c9182bc2fcf
Author: Shinya Maeda <shinya@gitlab.com>
Date:   Tue May 15 16:51:15 2018 +0900

    Clean up migrate_legacy_artifacts.rb (Fix static analysys)

commit ca4e5d33e27690dc276ba87d08dc24bcf31267f4
Author: Shinya Maeda <shinya@gitlab.com>
Date:   Tue May 15 16:32:59 2018 +0900

    Remove the culcuration method of metadata size

commit eac4c75be932ae6936702ddfd9202f333f18053f
Author: Shinya Maeda <shinya@gitlab.com>
Date:   Tue May 15 16:11:16 2018 +0900

    Remove Gitlab::BackgroundMigration:: scope

commit 4a5ca96b628a59eeba25778569e719695ac8b5e8
Author: Shinya Maeda <shinya@gitlab.com>
Date:   Tue May 15 16:09:09 2018 +0900

    Add limit to file_location column

commit 49ff3d9c98dc145fe3c91cd8ba39d7d71d183fb7
Author: Shinya Maeda <shinya@gitlab.com>
Date:   Tue May 15 16:05:22 2018 +0900

    Use size.to_i instead of if-condition

commit 526656e6ee5683ec7ea07bd6af3438c3fc32375d
Author: Shinya Maeda <shinya@gitlab.com>
Date:   Tue May 15 16:02:57 2018 +0900

    Rename current_path to hashed_path

commit 8e6faca7900cf382a35323b2ed0fabede9bf3bf9
Author: Shinya Maeda <shinya@gitlab.com>
Date:   Tue May 8 16:53:43 2018 +0900

    Rename location_1/2 to current/legacy_path

commit 5034543255963a250e076f37c5e42fbf4cb0fd05
Author: Shinya Maeda <shinya@gitlab.com>
Date:   Tue May 1 21:44:10 2018 +0900

    Rename path_type to file_location. Fix JobArtifactUploader to look up correct file location.

commit 4f7e3503f13d02d7a70e7b68bf740a8d8bb525db
Author: Shinya Maeda <shinya@gitlab.com>
Date:   Fri Apr 27 17:33:15 2018 +0900

    Add background migration for legacy artifacts

Add default_value_for to file_location column

Set file_location explicityly with default_values_for

Add file_location to factory

Remove tests of default_values_for

Set file_location nil as default

4 files changed, 59 insertions, 0 deletions

diff --git a/db/migrate/20180815160409_add_file_location_to_ci_job_artifacts.rb b/db/migrate/20180815160409_add_file_location_to_ci_job_artifacts.rb
new file mode 100644
index 00000000000..620342005fe
--- /dev/null
+++ b/db/migrate/20180815160409_add_file_location_to_ci_job_artifacts.rb
@@ -0,0 +1,9 @@
+class AddFileLocationToCiJobArtifacts < ActiveRecord::Migration
+  include Gitlab::Database::MigrationHelpers
+
+  DOWNTIME = false
+
+  def change
+    add_column :ci_job_artifacts, :file_location, :integer, limit: 2
+  end
+end
diff --git a/db/migrate/20180815170510_add_partial_index_to_ci_builds_artifacts_file.rb b/db/migrate/20180815170510_add_partial_index_to_ci_builds_artifacts_file.rb
new file mode 100644
index 00000000000..5e041ea6559
--- /dev/null
+++ b/db/migrate/20180815170510_add_partial_index_to_ci_builds_artifacts_file.rb
@@ -0,0 +1,16 @@
+class AddPartialIndexToCiBuildsArtifactsFile < ActiveRecord::Migration
+  include Gitlab::Database::MigrationHelpers
+
+  DOWNTIME = false
+  INDEX_NAME = 'partial_index_ci_builds_on_id_with_legacy_artifacts'.freeze
+
+  disable_ddl_transaction!
+
+  def up
+    add_concurrent_index(:ci_builds, :id, where: "artifacts_file <> ''", name: INDEX_NAME)
+  end
+
+  def down
+    remove_concurrent_index_by_name(:ci_builds, INDEX_NAME)
+  end
+end
diff --git a/db/post_migrate/20180816161409_migrate_legacy_artifacts_to_job_artifacts.rb b/db/post_migrate/20180816161409_migrate_legacy_artifacts_to_job_artifacts.rb
new file mode 100644
index 00000000000..2dd711e9c10
--- /dev/null
+++ b/db/post_migrate/20180816161409_migrate_legacy_artifacts_to_job_artifacts.rb
@@ -0,0 +1,32 @@
+class MigrateLegacyArtifactsToJobArtifacts < ActiveRecord::Migration
+  include Gitlab::Database::MigrationHelpers
+
+  DOWNTIME = false
+  MIGRATION = 'MigrateLegacyArtifacts'.freeze
+  BATCH_SIZE = 100
+
+  disable_ddl_transaction!
+
+  class Build < ActiveRecord::Base
+    include EachBatch
+
+    self.table_name = 'ci_builds'
+    self.inheritance_column = :_type_disabled
+
+    scope :with_legacy_artifacts, -> { where("artifacts_file <> ''") }
+  end
+
+  def up
+    MigrateLegacyArtifactsToJobArtifacts::Build
+      .with_legacy_artifacts.tap do |relation|
+      queue_background_migration_jobs_by_range_at_intervals(relation,
+                                                            MIGRATION,
+                                                            5.minutes,
+                                                            batch_size: BATCH_SIZE)
+    end
+  end
+
+  def down
+    # no-op
+  end
+end
diff --git a/db/schema.rb b/db/schema.rb
index 380d4e49ddf..8cfbc1103cb 100644
--- a/db/schema.rb
+++ b/db/schema.rb
@@ -341,6 +341,7 @@ ActiveRecord::Schema.define(version: 20180816193530) do
   add_index "ci_builds", ["commit_id", "status", "type"], name: "index_ci_builds_on_commit_id_and_status_and_type", using: :btree
   add_index "ci_builds", ["commit_id", "type", "name", "ref"], name: "index_ci_builds_on_commit_id_and_type_and_name_and_ref", using: :btree
   add_index "ci_builds", ["commit_id", "type", "ref"], name: "index_ci_builds_on_commit_id_and_type_and_ref", using: :btree
+  add_index "ci_builds", ["id"], name: "partial_index_ci_builds_on_id_with_legacy_artifacts", where: "(artifacts_file <> ''::text)", using: :btree
   add_index "ci_builds", ["project_id", "id"], name: "index_ci_builds_on_project_id_and_id", using: :btree
   add_index "ci_builds", ["protected"], name: "index_ci_builds_on_protected", using: :btree
   add_index "ci_builds", ["runner_id"], name: "index_ci_builds_on_runner_id", using: :btree
@@ -396,6 +397,7 @@ ActiveRecord::Schema.define(version: 20180816193530) do
     t.string "file"
     t.binary "file_sha256"
     t.integer "file_format", limit: 2
+    t.integer "file_location", limit: 2
   end
 
   add_index "ci_job_artifacts", ["expire_at", "job_id"], name: "index_ci_job_artifacts_on_expire_at_and_job_id", using: :btree