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Commit b668aaf4 by Pawel Chojnacki
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Split the metrics implementation to separate modules for Influx and Prometheus

parent ae8f7666
Showing with 239 additions and 229 deletions
app/services/metrics_service.rb
......@@ -30,14 +30,4 @@ class MetricsService
def multiprocess_metrics_path
@multiprocess_metrics_path ||= Rails.root.join(ENV['prometheus_multiproc_dir']).freeze
end
def metric_to_prom_line(metric)
labels = metric.labels&.map { |key, value| "#{key}=\"#{value}\"" }&.join(',') || ''
if labels.empty?
"#{metric.name} #{metric.value}"
else
"#{metric.name}{#{labels}} #{metric.value}"
end
end
end
lib/gitlab/health_checks/prometheus_text_format.rb
module Gitlab::HealthChecks
class PrometheusTextFormat
def marshal(metrics)
metrics_with_type_declarations(metrics).join("\n")
end
module Gitlab
module HealthChecks
class PrometheusTextFormat
def marshal(metrics)
metrics_with_type_declarations(metrics).join("\n")
end
private
private
def metrics_with_type_declarations(metrics)
type_declaration_added = {}
def metrics_with_type_declarations(metrics)
type_declaration_added = {}
metrics.flat_map do |metric|
metric_lines = []
metrics.flat_map do |metric|
metric_lines = []
unless type_declaration_added.has_key?(metric.name)
type_declaration_added[metric.name] = true
metric_lines << metric_type_declaration(metric)
end
unless type_declaration_added.has_key?(metric.name)
type_declaration_added[metric.name] = true
metric_lines << metric_type_declaration(metric)
end
metric_lines << metric_text(metric)
metric_lines << metric_text(metric)
end
end
end
def metric_type_declaration(metric)
"# TYPE #{metric.name} gauge"
end
def metric_type_declaration(metric)
"# TYPE #{metric.name} gauge"
end
def metric_text(metric)
labels = metric.labels&.map { |key, value| "#{key}=\"#{value}\"" }&.join(',') || ''
def metric_text(metric)
labels = metric.labels&.map { |key, value| "#{key}=\"#{value}\"" }&.join(',') || ''
if labels.empty?
"#{metric.name} #{metric.value}"
else
"#{metric.name}{#{labels}} #{metric.value}"
if labels.empty?
"#{metric.name} #{metric.value}"
else
"#{metric.name}{#{labels}} #{metric.value}"
end
end
end
end
end
end
\ No newline at end of file
lib/gitlab/metrics.rb
require 'prometheus/client'
module Gitlab
module Metrics
extend Gitlab::CurrentSettings
RAILS_ROOT = Rails.root.to_s
METRICS_ROOT = Rails.root.join('lib', 'gitlab', 'metrics').to_s
PATH_REGEX = /^#{RAILS_ROOT}\/?/
def self.settings
@settings ||= {
enabled: current_application_settings[:metrics_enabled],
prometheus_metrics_enabled: current_application_settings[:prometheus_metrics_enabled],
pool_size: current_application_settings[:metrics_pool_size],
timeout: current_application_settings[:metrics_timeout],
method_call_threshold: current_application_settings[:metrics_method_call_threshold],
host: current_application_settings[:metrics_host],
port: current_application_settings[:metrics_port],
sample_interval: current_application_settings[:metrics_sample_interval] || 15,
packet_size: current_application_settings[:metrics_packet_size] || 1
}
end
def self.prometheus_metrics_enabled?
settings[:prometheus_metrics_enabled] || false
end
def self.influx_metrics_enabled?
settings[:enabled] || false
end
extend Gitlab::Metrics::InfluxDb
extend Gitlab::Metrics::Prometheus
def self.enabled?
influx_metrics_enabled? || prometheus_metrics_enabled?
end
def self.mri?
RUBY_ENGINE == 'ruby'
end
def self.method_call_threshold
# This is memoized since this method is called for every instrumented
# method. Loading data from an external cache on every method call slows
# things down too much.
@method_call_threshold ||= settings[:method_call_threshold]
end
def self.pool
@pool
end
def self.registry
@registry ||= ::Prometheus::Client.registry
end
def self.counter(name, docstring, base_labels = {})
provide_metric(name) || registry.counter(name, docstring, base_labels)
end
def self.summary(name, docstring, base_labels = {})
provide_metric(name) || registry.summary(name, docstring, base_labels)
end
def self.gauge(name, docstring, base_labels = {})
provide_metric(name) || registry.gauge(name, docstring, base_labels)
end
def self.histogram(name, docstring, base_labels = {}, buckets = ::Prometheus::Client::Histogram::DEFAULT_BUCKETS)
provide_metric(name) || registry.histogram(name, docstring, base_labels, buckets)
end
def self.provide_metric(name)
if prometheus_metrics_enabled?
registry.get(name)
else
NullMetric.new
end
end
def self.submit_metrics(metrics)
prepared = prepare_metrics(metrics)
pool&.with do |connection|
prepared.each_slice(settings[:packet_size]) do |slice|
begin
connection.write_points(slice)
rescue StandardError
end
end
end
rescue Errno::EADDRNOTAVAIL, SocketError => ex
Gitlab::EnvironmentLogger.error('Cannot resolve InfluxDB address. GitLab Performance Monitoring will not work.')
Gitlab::EnvironmentLogger.error(ex)
end
def self.prepare_metrics(metrics)
metrics.map do |hash|
new_hash = hash.symbolize_keys
new_hash[:tags].each do |key, value|
if value.blank?
new_hash[:tags].delete(key)
else
new_hash[:tags][key] = escape_value(value)
end
end
new_hash
end
end
def self.escape_value(value)
value.to_s.gsub('=', '\\=')
end
# Measures the execution time of a block.
#
# Example:
#
# Gitlab::Metrics.measure(:find_by_username_duration) do
# User.find_by_username(some_username)
# end
#
# name - The name of the field to store the execution time in.
#
# Returns the value yielded by the supplied block.
def self.measure(name)
trans = current_transaction
return yield unless trans
real_start = Time.now.to_f
cpu_start = System.cpu_time
retval = yield
cpu_stop = System.cpu_time
real_stop = Time.now.to_f
real_time = (real_stop - real_start) * 1000.0
cpu_time = cpu_stop - cpu_start
trans.increment("#{name}_real_time", real_time)
trans.increment("#{name}_cpu_time", cpu_time)
trans.increment("#{name}_call_count", 1)
retval
end
# Adds a tag to the current transaction (if any)
#
# name - The name of the tag to add.
# value - The value of the tag.
def self.tag_transaction(name, value)
trans = current_transaction
trans&.add_tag(name, value)
end
# Sets the action of the current transaction (if any)
#
# action - The name of the action.
def self.action=(action)
trans = current_transaction
trans&.action = action
end
# Tracks an event.
#
# See `Gitlab::Metrics::Transaction#add_event` for more details.
def self.add_event(*args)
trans = current_transaction
trans&.add_event(*args)
end
# Returns the prefix to use for the name of a series.
def self.series_prefix
@series_prefix ||= Sidekiq.server? ? 'sidekiq_' : 'rails_'
end
# Allow access from other metrics related middlewares
def self.current_transaction
Transaction.current
end
# When enabled this should be set before being used as the usual pattern
# "@foo ||= bar" is _not_ thread-safe.
if influx_metrics_enabled?
@pool = ConnectionPool.new(size: settings[:pool_size], timeout: settings[:timeout]) do
host = settings[:host]
port = settings[:port]
InfluxDB::Client.
new(udp: { host: host, port: port })
end
end
end
end
end
\ No newline at end of file
lib/gitlab/metrics/influx_db.rb 0 → 100644
module Gitlab
module Metrics
module InfluxDb
include Gitlab::CurrentSettings
def influx_metrics_enabled?
settings[:enabled] || false
end
RAILS_ROOT = Rails.root.to_s
METRICS_ROOT = Rails.root.join('lib', 'gitlab', 'metrics').to_s
PATH_REGEX = /^#{RAILS_ROOT}\/?/
def settings
@settings ||= {
enabled: current_application_settings[:metrics_enabled],
pool_size: current_application_settings[:metrics_pool_size],
timeout: current_application_settings[:metrics_timeout],
method_call_threshold: current_application_settings[:metrics_method_call_threshold],
host: current_application_settings[:metrics_host],
port: current_application_settings[:metrics_port],
sample_interval: current_application_settings[:metrics_sample_interval] || 15,
packet_size: current_application_settings[:metrics_packet_size] || 1
}
end
def mri?
RUBY_ENGINE == 'ruby'
end
def method_call_threshold
# This is memoized since this method is called for every instrumented
# method. Loading data from an external cache on every method call slows
# things down too much.
@method_call_threshold ||= settings[:method_call_threshold]
end
def pool
@pool
end
def submit_metrics(metrics)
prepared = prepare_metrics(metrics)
pool&.with do |connection|
prepared.each_slice(settings[:packet_size]) do |slice|
begin
connection.write_points(slice)
rescue StandardError
end
end
end
rescue Errno::EADDRNOTAVAIL, SocketError => ex
Gitlab::EnvironmentLogger.error('Cannot resolve InfluxDB address. GitLab Performance Monitoring will not work.')
Gitlab::EnvironmentLogger.error(ex)
end
def prepare_metrics(metrics)
metrics.map do |hash|
new_hash = hash.symbolize_keys
new_hash[:tags].each do |key, value|
if value.blank?
new_hash[:tags].delete(key)
else
new_hash[:tags][key] = escape_value(value)
end
end
new_hash
end
end
def escape_value(value)
value.to_s.gsub('=', '\\=')
end
# Measures the execution time of a block.
#
# Example:
#
# Gitlab::Metrics.measure(:find_by_username_duration) do
# User.find_by_username(some_username)
# end
#
# name - The name of the field to store the execution time in.
#
# Returns the value yielded by the supplied block.
def measure(name)
trans = current_transaction
return yield unless trans
real_start = Time.now.to_f
cpu_start = System.cpu_time
retval = yield
cpu_stop = System.cpu_time
real_stop = Time.now.to_f
real_time = (real_stop - real_start) * 1000.0
cpu_time = cpu_stop - cpu_start
trans.increment("#{name}_real_time", real_time)
trans.increment("#{name}_cpu_time", cpu_time)
trans.increment("#{name}_call_count", 1)
retval
end
# Adds a tag to the current transaction (if any)
#
# name - The name of the tag to add.
# value - The value of the tag.
def tag_transaction(name, value)
trans = current_transaction
trans&.add_tag(name, value)
end
# Sets the action of the current transaction (if any)
#
# action - The name of the action.
def action=(action)
trans = current_transaction
trans&.action = action
end
# Tracks an event.
#
# See `Gitlab::Metrics::Transaction#add_event` for more details.
def add_event(*args)
trans = current_transaction
trans&.add_event(*args)
end
# Returns the prefix to use for the name of a series.
def series_prefix
@series_prefix ||= Sidekiq.server? ? 'sidekiq_' : 'rails_'
end
# Allow access from other metrics related middlewares
def current_transaction
Transaction.current
end
# When enabled this should be set before being used as the usual pattern
# "@foo ||= bar" is _not_ thread-safe.
if influx_metrics_enabled?
@pool = ConnectionPool.new(size: settings[:pool_size], timeout: settings[:timeout]) do
host = settings[:host]
port = settings[:port]
InfluxDB::Client.
new(udp: { host: host, port: port })
end
end
end
end
end
\ No newline at end of file
lib/gitlab/metrics/prometheus.rb 0 → 100644
require 'prometheus/client'
module Gitlab
module Metrics
module Prometheus
include Gitlab::CurrentSettings
def prometheus_metrics_enabled?
@prometheus_metrics_enabled ||= current_application_settings[:prometheus_metrics_enabled] || false
end
def registry
@registry ||= ::Prometheus::Client.registry
end
def counter(name, docstring, base_labels = {})
provide_metric(name) || registry.counter(name, docstring, base_labels)
end
def summary(name, docstring, base_labels = {})
provide_metric(name) || registry.summary(name, docstring, base_labels)
end
def gauge(name, docstring, base_labels = {})
provide_metric(name) || registry.gauge(name, docstring, base_labels)
end
def histogram(name, docstring, base_labels = {}, buckets = ::Prometheus::Client::Histogram::DEFAULT_BUCKETS)
provide_metric(name) || registry.histogram(name, docstring, base_labels, buckets)
end
def provide_metric(name)
if prometheus_metrics_enabled?
registry.get(name)
else
NullMetric.new
end
end
end
end
end
\ No newline at end of file
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