debian-mirror-gitlab/lib/gitlab/metrics/prometheus.rb

90 lines
2.4 KiB
Ruby
Raw Normal View History

2018-12-23 12:14:25 +05:30
# frozen_string_literal: true
2017-09-10 17:25:29 +05:30
require 'prometheus/client'
module Gitlab
module Metrics
module Prometheus
2018-03-17 18:26:18 +05:30
extend ActiveSupport::Concern
2017-09-10 17:25:29 +05:30
2018-03-17 18:26:18 +05:30
REGISTRY_MUTEX = Mutex.new
PROVIDER_MUTEX = Mutex.new
2017-09-10 17:25:29 +05:30
2018-03-17 18:26:18 +05:30
class_methods do
include Gitlab::Utils::StrongMemoize
2017-09-10 17:25:29 +05:30
2018-03-17 18:26:18 +05:30
def metrics_folder_present?
multiprocess_files_dir = ::Prometheus::Client.configuration.multiprocess_files_dir
2017-09-10 17:25:29 +05:30
2018-03-17 18:26:18 +05:30
multiprocess_files_dir &&
::Dir.exist?(multiprocess_files_dir) &&
::File.writable?(multiprocess_files_dir)
end
2017-09-10 17:25:29 +05:30
2018-03-17 18:26:18 +05:30
def prometheus_metrics_enabled?
strong_memoize(:prometheus_metrics_enabled) do
prometheus_metrics_enabled_unmemoized
end
end
2017-09-10 17:25:29 +05:30
2018-11-08 19:23:39 +05:30
def reset_registry!
clear_memoization(:registry)
REGISTRY_MUTEX.synchronize do
::Prometheus::Client.reset!
end
end
2018-03-17 18:26:18 +05:30
def registry
strong_memoize(:registry) do
REGISTRY_MUTEX.synchronize do
strong_memoize(:registry) do
::Prometheus::Client.registry
end
end
end
end
2017-09-10 17:25:29 +05:30
2018-03-17 18:26:18 +05:30
def counter(name, docstring, base_labels = {})
safe_provide_metric(:counter, name, docstring, base_labels)
end
2017-09-10 17:25:29 +05:30
2018-03-17 18:26:18 +05:30
def summary(name, docstring, base_labels = {})
safe_provide_metric(:summary, name, docstring, base_labels)
end
2017-09-10 17:25:29 +05:30
2018-03-17 18:26:18 +05:30
def gauge(name, docstring, base_labels = {}, multiprocess_mode = :all)
safe_provide_metric(:gauge, name, docstring, base_labels, multiprocess_mode)
end
2017-09-10 17:25:29 +05:30
2018-03-17 18:26:18 +05:30
def histogram(name, docstring, base_labels = {}, buckets = ::Prometheus::Client::Histogram::DEFAULT_BUCKETS)
safe_provide_metric(:histogram, name, docstring, base_labels, buckets)
2017-09-10 17:25:29 +05:30
end
2018-03-17 18:26:18 +05:30
private
def safe_provide_metric(method, name, *args)
metric = provide_metric(name)
return metric if metric
2017-09-10 17:25:29 +05:30
2018-03-17 18:26:18 +05:30
PROVIDER_MUTEX.synchronize do
provide_metric(name) || registry.method(method).call(name, *args)
end
end
def provide_metric(name)
if prometheus_metrics_enabled?
registry.get(name)
else
NullMetric.instance
end
end
def prometheus_metrics_enabled_unmemoized
metrics_folder_present? && Gitlab::CurrentSettings.prometheus_metrics_enabled || false
end
2017-09-10 17:25:29 +05:30
end
end
end
end