debian-mirror-gitlab/config/initializers/7_prometheus_metrics.rb

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require 'prometheus/client'
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# 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
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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|
# 0 should be Sentry to catch errors in this middleware
config.middleware.insert(1, Gitlab::Metrics::RequestsRackMiddleware)
end
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Sidekiq.configure_server do |config|
config.on(:startup) do
Gitlab::Metrics::SidekiqMetricsExporter.instance.start
end
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
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
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end
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Gitlab::Cluster::LifecycleEvents.on_master_start do
if defined?(::Unicorn)
Gitlab::Metrics::Samplers::UnicornSampler.initialize_instance(Settings.monitoring.unicorn_sampler_interval).start
elsif defined?(::Puma)
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Gitlab::Metrics::Samplers::PumaSampler.initialize_instance(Settings.monitoring.puma_sampler_interval).start
end
end
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end