62 lines
1.7 KiB
Ruby
62 lines
1.7 KiB
Ruby
# frozen_string_literal: true
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module Gitlab
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module Database
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module LoadBalancing
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# Class for setting up load balancing of a specific model.
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class Setup
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attr_reader :configuration
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def initialize(model, start_service_discovery: false)
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@model = model
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@configuration = Configuration.for_model(model)
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@start_service_discovery = start_service_discovery
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end
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def setup
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disable_prepared_statements
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setup_load_balancer
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setup_service_discovery
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end
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def disable_prepared_statements
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db_config_object = @model.connection_db_config
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config =
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db_config_object.configuration_hash.merge(prepared_statements: false)
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hash_config = ActiveRecord::DatabaseConfigurations::HashConfig.new(
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db_config_object.env_name,
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db_config_object.name,
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config
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)
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@model.establish_connection(hash_config)
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end
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def setup_load_balancer
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lb = LoadBalancer.new(configuration)
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# We just use a simple `class_attribute` here so we don't need to
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# inject any modules and/or expose unnecessary methods.
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@model.class_attribute(:connection)
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@model.class_attribute(:sticking)
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@model.connection = ConnectionProxy.new(lb)
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@model.sticking = Sticking.new(lb)
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end
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def setup_service_discovery
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return unless configuration.service_discovery_enabled?
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lb = @model.connection.load_balancer
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sv = ServiceDiscovery.new(lb, **configuration.service_discovery)
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sv.perform_service_discovery
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sv.start if @start_service_discovery
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end
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end
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end
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end
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end
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