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# frozen_string_literal: true
class PatchPrometheusServicesForSharedClusterApplications < ActiveRecord::Migration[5.2]
include Gitlab::Database::MigrationHelpers
DOWNTIME = false
MIGRATION = 'ActivatePrometheusServicesForSharedClusterApplications'.freeze
BATCH_SIZE = 500
DELAY = 2.minutes
disable_ddl_transaction!
module Migratable
module Applications
class Prometheus < ActiveRecord::Base
self.table_name = 'clusters_applications_prometheus'
enum status: {
errored: -1,
installed: 3,
updated: 5
}
end
end
class Project < ActiveRecord::Base
self.table_name = 'projects'
include ::EachBatch
scope :with_application_on_group_clusters, -> {
joins("INNER JOIN namespaces ON namespaces.id = projects.namespace_id")
.joins("INNER JOIN cluster_groups ON cluster_groups.group_id = namespaces.id")
.joins("INNER JOIN clusters ON clusters.id = cluster_groups.cluster_id AND clusters.cluster_type = #{Cluster.cluster_types['group_type']}")
.joins("INNER JOIN clusters_applications_prometheus ON clusters_applications_prometheus.cluster_id = clusters.id
AND clusters_applications_prometheus.status IN (#{Applications::Prometheus.statuses[:installed]}, #{Applications::Prometheus.statuses[:updated]})")
}
scope :without_active_prometheus_services, -> {
joins("LEFT JOIN services ON services.project_id = projects.id AND services.type = 'PrometheusService'")
.where("services.id IS NULL OR (services.active = FALSE AND services.properties = '{}')")
}
end
class Cluster < ActiveRecord::Base
self.table_name = 'clusters'
enum cluster_type: {
instance_type: 1,
group_type: 2
}
def self.has_prometheus_application?
joins("INNER JOIN clusters_applications_prometheus ON clusters_applications_prometheus.cluster_id = clusters.id
AND clusters_applications_prometheus.status IN (#{Applications::Prometheus.statuses[:installed]}, #{Applications::Prometheus.statuses[:updated]})").exists?
end
end
end
def up
projects_without_active_prometheus_service.group('projects.id').each_batch(of: BATCH_SIZE) do |batch, index|
bg_migrations_batch = batch.select('projects.id').map { |project| [MIGRATION, project.id] }
delay = index * DELAY
BackgroundMigrationWorker.bulk_perform_in(delay.seconds, bg_migrations_batch)
end
end
def down
# no-op
end
private
def projects_without_active_prometheus_service
scope = Migratable::Project.without_active_prometheus_services
return scope if migrate_instance_cluster?
scope.with_application_on_group_clusters
end
def migrate_instance_cluster?
if instance_variable_defined?('@migrate_instance_cluster')
@migrate_instance_cluster
else
@migrate_instance_cluster = Migratable::Cluster.instance_type.has_prometheus_application?
end
end
end
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