64 lines
2 KiB
Ruby
64 lines
2 KiB
Ruby
class CleanupBuildStageMigration < ActiveRecord::Migration[4.2]
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include Gitlab::Database::MigrationHelpers
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DOWNTIME = false
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TMP_INDEX = 'tmp_id_stage_partial_null_index'.freeze
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disable_ddl_transaction!
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class Build < ActiveRecord::Base
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include EachBatch
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self.table_name = 'ci_builds'
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self.inheritance_column = :_type_disabled
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end
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def up
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disable_statement_timeout do
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##
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# We steal from the background migrations queue to catch up with the
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# scheduled migrations set.
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#
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Gitlab::BackgroundMigration.steal('MigrateBuildStage')
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##
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# We add temporary index, to make iteration over batches more performant.
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# Conditional here is to avoid the need of doing that in a separate
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# migration file to make this operation idempotent.
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#
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unless index_exists_by_name?(:ci_builds, TMP_INDEX)
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add_concurrent_index(:ci_builds, :id, where: 'stage_id IS NULL', name: TMP_INDEX)
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end
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##
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# We check if there are remaining rows that should be migrated (for example
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# if Sidekiq / Redis fails / is restarted, what could result in not all
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# background migrations being executed correctly.
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#
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# We migrate remaining rows synchronously in a blocking way, to make sure
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# that when this migration is done we are confident that all rows are
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# already migrated.
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#
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Build.where('stage_id IS NULL').each_batch(of: 50) do |batch|
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range = batch.pluck('MIN(id)', 'MAX(id)').first
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Gitlab::BackgroundMigration::MigrateBuildStage.new.perform(*range)
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end
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##
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# We remove temporary index, because it is not required during standard
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# operations and runtime.
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#
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remove_concurrent_index_by_name(:ci_builds, TMP_INDEX)
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end
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end
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def down
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if index_exists_by_name?(:ci_builds, TMP_INDEX)
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disable_statement_timeout do
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remove_concurrent_index_by_name(:ci_builds, TMP_INDEX)
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end
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end
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end
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end
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