73 lines
2.5 KiB
Ruby
73 lines
2.5 KiB
Ruby
require 'prometheus/client'
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# Keep separate directories for separate processes
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def prometheus_default_multiproc_dir
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return unless Rails.env.development? || Rails.env.test?
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if Sidekiq.server?
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Rails.root.join('tmp/prometheus_multiproc_dir/sidekiq')
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elsif defined?(Unicorn::Worker)
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Rails.root.join('tmp/prometheus_multiproc_dir/unicorn')
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elsif defined?(::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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Prometheus::Client.configure do |config|
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config.logger = Rails.logger # rubocop:disable Gitlab/RailsLogger
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config.initial_mmap_file_size = 4 * 1024
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config.multiprocess_files_dir = ENV['prometheus_multiproc_dir'] || prometheus_default_multiproc_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(1, Gitlab::Metrics::RequestsRackMiddleware)
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end
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Sidekiq.configure_server do |config|
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config.on(:startup) do
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Gitlab::Metrics::SidekiqMetricsExporter.instance.start
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end
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end
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if !Rails.env.test? && Gitlab::Metrics.prometheus_metrics_enabled?
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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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Gitlab::Metrics::Samplers::RubySampler.initialize_instance(Settings.monitoring.ruby_sampler_interval).start
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end
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Gitlab::Cluster::LifecycleEvents.on_master_start do
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if defined?(::Unicorn)
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Gitlab::Metrics::Samplers::UnicornSampler.initialize_instance(Settings.monitoring.unicorn_sampler_interval).start
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elsif defined?(::Puma)
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Gitlab::Metrics::Samplers::PumaSampler.initialize_instance(Settings.monitoring.puma_sampler_interval).start
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end
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end
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end
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def cleanup_prometheus_multiproc_dir
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# The following is necessary to ensure stale Prometheus metrics don't
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# accumulate over time. It needs to be done in this hook as opposed to
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# inside an init script to ensure metrics files aren't deleted after new
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# unicorn workers start after a SIGUSR2 is received.
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if dir = ::Prometheus::Client.configuration.multiprocess_files_dir
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old_metrics = Dir[File.join(dir, '*.db')]
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FileUtils.rm_rf(old_metrics)
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end
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end
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Gitlab::Cluster::LifecycleEvents.on_master_start do
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cleanup_prometheus_multiproc_dir
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end
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Gitlab::Cluster::LifecycleEvents.on_master_restart do
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cleanup_prometheus_multiproc_dir
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end
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