2016-01-14 18:37:52 +05:30
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module Gitlab
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module Metrics
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extend Gitlab::CurrentSettings
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RAILS_ROOT = Rails.root.to_s
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METRICS_ROOT = Rails.root.join('lib', 'gitlab', 'metrics').to_s
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PATH_REGEX = /^#{RAILS_ROOT}\/?/
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def self.settings
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@settings ||= {
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enabled: current_application_settings[:metrics_enabled],
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pool_size: current_application_settings[:metrics_pool_size],
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timeout: current_application_settings[:metrics_timeout],
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method_call_threshold: current_application_settings[:metrics_method_call_threshold],
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host: current_application_settings[:metrics_host],
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2016-01-19 16:12:03 +05:30
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port: current_application_settings[:metrics_port],
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2016-06-02 11:05:42 +05:30
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sample_interval: current_application_settings[:metrics_sample_interval] || 15,
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packet_size: current_application_settings[:metrics_packet_size] || 1
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2016-01-14 18:37:52 +05:30
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}
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end
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def self.enabled?
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settings[:enabled] || false
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end
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def self.mri?
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RUBY_ENGINE == 'ruby'
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end
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def self.method_call_threshold
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# This is memoized since this method is called for every instrumented
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# method. Loading data from an external cache on every method call slows
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# things down too much.
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@method_call_threshold ||= settings[:method_call_threshold]
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end
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def self.pool
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@pool
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end
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def self.submit_metrics(metrics)
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prepared = prepare_metrics(metrics)
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pool.with do |connection|
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2016-06-02 11:05:42 +05:30
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prepared.each_slice(settings[:packet_size]) do |slice|
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2016-01-14 18:37:52 +05:30
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begin
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connection.write_points(slice)
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2016-01-14 18:37:52 +05:30
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rescue StandardError
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end
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end
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end
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end
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def self.prepare_metrics(metrics)
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metrics.map do |hash|
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new_hash = hash.symbolize_keys
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new_hash[:tags].each do |key, value|
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if value.blank?
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new_hash[:tags].delete(key)
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else
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new_hash[:tags][key] = escape_value(value)
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end
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end
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new_hash
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end
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end
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def self.escape_value(value)
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value.to_s.gsub('=', '\\=')
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end
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2016-06-02 11:05:42 +05:30
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# Measures the execution time of a block.
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#
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# Example:
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#
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# Gitlab::Metrics.measure(:find_by_username_duration) do
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# User.find_by_username(some_username)
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# end
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#
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# name - The name of the field to store the execution time in.
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#
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# Returns the value yielded by the supplied block.
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def self.measure(name)
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trans = current_transaction
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return yield unless trans
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real_start = Time.now.to_f
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cpu_start = System.cpu_time
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retval = yield
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cpu_stop = System.cpu_time
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real_stop = Time.now.to_f
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real_time = (real_stop - real_start) * 1000.0
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cpu_time = cpu_stop - cpu_start
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trans.increment("#{name}_real_time", real_time)
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trans.increment("#{name}_cpu_time", cpu_time)
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trans.increment("#{name}_call_count", 1)
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retval
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end
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# Adds a tag to the current transaction (if any)
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#
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# name - The name of the tag to add.
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# value - The value of the tag.
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def self.tag_transaction(name, value)
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trans = current_transaction
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trans.add_tag(name, value) if trans
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end
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# Sets the action of the current transaction (if any)
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#
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# action - The name of the action.
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def self.action=(action)
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trans = current_transaction
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trans.action = action if trans
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end
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2016-09-13 17:45:13 +05:30
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# Tracks an event.
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#
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# See `Gitlab::Metrics::Transaction#add_event` for more details.
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def self.add_event(*args)
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trans = current_transaction
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trans.add_event(*args) if trans
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end
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# Returns the prefix to use for the name of a series.
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def self.series_prefix
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@series_prefix ||= Sidekiq.server? ? 'sidekiq_' : 'rails_'
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end
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2016-01-14 18:37:52 +05:30
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# When enabled this should be set before being used as the usual pattern
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# "@foo ||= bar" is _not_ thread-safe.
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if enabled?
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@pool = ConnectionPool.new(size: settings[:pool_size], timeout: settings[:timeout]) do
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host = settings[:host]
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port = settings[:port]
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InfluxDB::Client.
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new(udp: { host: host, port: port })
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end
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end
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2016-06-02 11:05:42 +05:30
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2016-09-13 17:45:13 +05:30
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# Allow access from other metrics related middlewares
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2016-06-02 11:05:42 +05:30
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def self.current_transaction
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Transaction.current
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end
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2016-01-14 18:37:52 +05:30
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end
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end
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