0fc9f9d3e7
DB schema generated by a migration may look different in rails 4 and 5 (because rails 5 may use different default values). For this reason it's important to explicitly set for which rails version a migration was written for. See https://stackoverflow.com/questions/35929869/activerecordmigration-deprecation-warning-asks-for-rails-version-but-im-no/35930912#35930912
63 lines
1.8 KiB
Ruby
63 lines
1.8 KiB
Ruby
require 'json'
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# See http://doc.gitlab.com/ce/development/migration_style_guide.html
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# for more information on how to write migrations for GitLab.
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class MigrateMailroomQueueFromDefault < ActiveRecord::Migration[4.2]
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include Gitlab::Database::MigrationHelpers
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DOWNTIME = true
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DOWNTIME_REASON = <<-EOF
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Moving Sidekiq jobs from queues requires Sidekiq to be stopped. Not stopping
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Sidekiq will result in the loss of jobs that are scheduled after this
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migration completes.
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EOF
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disable_ddl_transaction!
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# Jobs for which the queue names have been changed (e.g. multiple workers
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# using the same non-default queue).
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#
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# The keys are the old queue names, the values the jobs to move and their new
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# queue names.
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RENAMED_QUEUES = {
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incoming_email: {
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'EmailReceiverWorker' => :email_receiver
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}
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}.freeze
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def up
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Sidekiq.redis do |redis|
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RENAMED_QUEUES.each do |queue, jobs|
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migrate_from_queue(redis, queue, jobs)
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end
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end
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end
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def down
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Sidekiq.redis do |redis|
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RENAMED_QUEUES.each do |dest_queue, jobs|
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jobs.each do |worker, from_queue|
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migrate_from_queue(redis, from_queue, worker => dest_queue)
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end
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end
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end
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end
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def migrate_from_queue(redis, queue, job_mapping)
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while job = redis.lpop("queue:#{queue}")
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payload = JSON.parse(job)
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new_queue = job_mapping[payload['class']]
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# If we have no target queue to migrate to we're probably dealing with
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# some ancient job for which the worker no longer exists. In that case
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# there's no sane option we can take, other than just dropping the job.
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next unless new_queue
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payload['queue'] = new_queue
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redis.lpush("queue:#{new_queue}", JSON.dump(payload))
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end
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end
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end
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