126 lines
4.6 KiB
Ruby
126 lines
4.6 KiB
Ruby
# frozen_string_literal: true
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require Rails.root.join('metrics_server', 'metrics_server')
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# Keep separate directories for separate processes
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def metrics_temp_dir
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return unless Rails.env.development? || Rails.env.test?
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if Gitlab::Runtime.sidekiq?
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Rails.root.join('tmp/prometheus_multiproc_dir/sidekiq')
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elsif Gitlab::Runtime.puma?
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Rails.root.join('tmp/prometheus_multiproc_dir/puma')
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else
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Rails.root.join('tmp/prometheus_multiproc_dir')
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end
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end
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def prometheus_metrics_dir
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ENV['prometheus_multiproc_dir'] || metrics_temp_dir
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end
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def puma_master?
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Prometheus::PidProvider.worker_id == 'puma_master'
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end
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# Whether a dedicated process should run that serves Rails application metrics, as opposed
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# to using a Rails controller.
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def puma_dedicated_metrics_server?
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Settings.monitoring.web_exporter.enabled
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end
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if puma_master?
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# The following is necessary to ensure stale Prometheus metrics don't accumulate over time.
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# It needs to be done as early as possible to ensure new metrics aren't being deleted.
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#
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# Note that this should not happen for Sidekiq. Since Sidekiq workers are spawned from the
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# sidekiq-cluster script, we perform this cleanup in `sidekiq_cluster/cli.rb` instead,
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# since it must happen prior to any worker processes or the metrics server starting up.
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Prometheus::CleanupMultiprocDirService.new(prometheus_metrics_dir).execute
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::Prometheus::Client.reinitialize_on_pid_change(force: true)
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end
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::Prometheus::Client.configure do |config|
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config.logger = Gitlab::AppLogger
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config.multiprocess_files_dir = prometheus_metrics_dir
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config.pid_provider = ::Prometheus::PidProvider.method(:worker_id)
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end
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Gitlab::Application.configure do |config|
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# 0 should be Sentry to catch errors in this middleware
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config.middleware.insert_after(Labkit::Middleware::Rack, Gitlab::Metrics::RequestsRackMiddleware)
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end
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# Any actions beyond this check should only execute outside of tests, when running in an application
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# context (i.e. not in the Rails console or rspec) and when users have enabled metrics.
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return if Rails.env.test? || !Gitlab::Runtime.application? || !Gitlab::Metrics.prometheus_metrics_enabled?
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Gitlab::Cluster::LifecycleEvents.on_master_start do
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Gitlab::Metrics.gauge(:deployments, 'GitLab Version', {}, :max).set({ version: Gitlab::VERSION, revision: Gitlab.revision }, 1)
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if Gitlab::Runtime.puma?
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[
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Gitlab::Metrics::Samplers::RubySampler,
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Gitlab::Metrics::Samplers::ThreadsSampler
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].each { |sampler| sampler.instance(logger: Gitlab::AppLogger).start }
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Gitlab::Metrics::Samplers::PumaSampler.instance.start
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MetricsServer.start_for_puma if puma_dedicated_metrics_server?
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end
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Gitlab::Ci::Parsers.instrument!
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rescue IOError => e
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Gitlab::ErrorTracking.track_exception(e)
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Gitlab::Metrics.error_detected!
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end
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Gitlab::Cluster::LifecycleEvents.on_worker_start do
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defined?(::Prometheus::Client.reinitialize_on_pid_change) && ::Prometheus::Client.reinitialize_on_pid_change
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logger = Gitlab::AppLogger
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# Since we also run these samplers in the Puma primary, we need to re-create them each time we fork.
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# For Sidekiq, this does not make any difference, since there is no primary.
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[
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Gitlab::Metrics::Samplers::RubySampler,
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Gitlab::Metrics::Samplers::ThreadsSampler
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].each { |sampler| sampler.initialize_instance(logger: logger, recreate: true).start }
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Gitlab::Metrics::Samplers::DatabaseSampler.initialize_instance(logger: logger).start
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if Gitlab::Runtime.puma?
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# Since we are observing a metrics server from the Puma primary, we would inherit
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# this supervision thread after forking into workers, so we need to explicitly stop it here.
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::MetricsServer::PumaProcessSupervisor.instance.stop if puma_dedicated_metrics_server?
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Gitlab::Metrics::Samplers::ActionCableSampler.instance(logger: logger).start
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end
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if Gitlab.ee? && Gitlab::Runtime.sidekiq?
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Gitlab::Metrics::Samplers::GlobalSearchSampler.instance(logger: logger).start
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end
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Gitlab::Ci::Parsers.instrument!
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rescue IOError => e
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Gitlab::ErrorTracking.track_exception(e)
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Gitlab::Metrics.error_detected!
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end
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if Gitlab::Runtime.puma? && puma_dedicated_metrics_server?
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Gitlab::Cluster::LifecycleEvents.on_before_graceful_shutdown do
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# We need to ensure that before we re-exec or shutdown server
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# we also stop the metrics server
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::MetricsServer::PumaProcessSupervisor.instance.shutdown
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end
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Gitlab::Cluster::LifecycleEvents.on_before_master_restart do
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# We need to ensure that before we re-exec server
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# we also stop the metrics server
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#
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# We do it again, for being extra safe,
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# but it should not be needed
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::MetricsServer::PumaProcessSupervisor.instance.shutdown
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end
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end
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