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require 'prometheus/client'
# Keep separate directories for separate processes
def prometheus_default_multiproc_dir
return unless Rails.env.development? || Rails.env.test?
if Sidekiq.server?
Rails.root.join('tmp/prometheus_multiproc_dir/sidekiq')
elsif defined?(Unicorn::Worker)
Rails.root.join('tmp/prometheus_multiproc_dir/unicorn')
elsif defined?(::Puma)
Rails.root.join('tmp/prometheus_multiproc_dir/puma')
else
Rails.root.join('tmp/prometheus_multiproc_dir')
end
end
Prometheus::Client.configure do |config|
config.logger = Rails.logger # rubocop:disable Gitlab/RailsLogger
config.initial_mmap_file_size = 4 * 1024
config.multiprocess_files_dir = ENV['prometheus_multiproc_dir'] || prometheus_default_multiproc_dir
config.pid_provider = Prometheus::PidProvider.method(:worker_id)
end
Gitlab::Application.configure do |config|
# 0 should be Sentry to catch errors in this middleware
config.middleware.insert(1, Gitlab::Metrics::RequestsRackMiddleware)
end
Sidekiq.configure_server do |config|
config.on(:startup) do
# webserver metrics are cleaned up in config.ru: `warmup` block
Prometheus::CleanupMultiprocDirService.new.execute
Gitlab::Metrics::SidekiqMetricsExporter.instance.start
end
end
if !Rails.env.test? && Gitlab::Metrics.prometheus_metrics_enabled?
Gitlab::Cluster::LifecycleEvents.on_worker_start do
defined?(::Prometheus::Client.reinitialize_on_pid_change) && Prometheus::Client.reinitialize_on_pid_change
Gitlab::Metrics::Samplers::RubySampler.initialize_instance(Settings.monitoring.ruby_sampler_interval).start
end
Gitlab::Cluster::LifecycleEvents.on_master_start do
::Prometheus::Client.reinitialize_on_pid_change(force: true)
if defined?(::Unicorn)
Gitlab::Metrics::Samplers::UnicornSampler.instance(Settings.monitoring.unicorn_sampler_interval).start
elsif defined?(::Puma)
Gitlab::Metrics::Samplers::PumaSampler.instance(Settings.monitoring.puma_sampler_interval).start
end
end
end
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