debian-mirror-gitlab/lib/gitlab/database/reindexing/coordinator.rb

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# frozen_string_literal: true
module Gitlab
module Database
module Reindexing
class Coordinator
include ExclusiveLeaseGuard
# Maximum lease time for the global Redis lease
# This should be higher than the maximum time for any
# long running step in the reindexing process (compare with
# statement timeouts).
TIMEOUT_PER_ACTION = 1.day
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attr_reader :index, :notifier
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def initialize(index, notifier = GrafanaNotifier.new)
@index = index
@notifier = notifier
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end
def perform
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# This obtains a global lease such that there's
# only one live reindexing process at a time.
try_obtain_lease do
action = ReindexAction.create_for(index)
with_notifications(action) do
perform_for(index, action)
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end
end
end
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def drop
try_obtain_lease do
Gitlab::AppLogger.info("Removing index #{index.identifier} which is a leftover, temporary index from previous reindexing activity")
retries = Gitlab::Database::WithLockRetriesOutsideTransaction.new(
connection: index.connection,
timing_configuration: REMOVE_INDEX_RETRY_CONFIG,
klass: self.class,
logger: Gitlab::AppLogger
)
retries.run(raise_on_exhaustion: false) do
index.connection.tap do |conn|
conn.execute("DROP INDEX CONCURRENTLY IF EXISTS #{conn.quote_table_name(index.schema)}.#{conn.quote_table_name(index.name)}")
end
end
end
end
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private
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def with_notifications(action)
notifier.notify_start(action)
yield
ensure
notifier.notify_end(action)
end
def perform_for(index, action)
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ReindexConcurrently.new(index).perform
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rescue StandardError
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action.state = :failed
raise
ensure
action.finish
end
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def lease_timeout
TIMEOUT_PER_ACTION
end
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def lease_key
[super, index.connection_db_config.name].join('/')
end
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end
end
end
end