Class: GitLab::Exporter::PrometheusMetrics
- Inherits:
-
Object
- Object
- GitLab::Exporter::PrometheusMetrics
- Defined in:
- lib/gitlab_exporter/prometheus.rb
Overview
Prometheus metrics container
Provides a simple API to ‘add` metrics and then turn them `to_s` which will just dump all the metrics in prometheus format
The add method also can take any arbitrary amount of labels in a ‘key: value` format.
Instance Method Summary collapse
- #add(name, value, quantile = false, **labels) ⇒ Object
-
#initialize(include_timestamp: true) ⇒ PrometheusMetrics
constructor
A new instance of PrometheusMetrics.
- #to_s ⇒ Object
Constructor Details
#initialize(include_timestamp: true) ⇒ PrometheusMetrics
Returns a new instance of PrometheusMetrics.
12 13 14 15 16 |
# File 'lib/gitlab_exporter/prometheus.rb', line 12 def initialize(include_timestamp: true) @metrics = Hash.new { |h, k| h[k] = [] } @quantiles = Hash.new { |h, k| h[k] = [] } @include_timestamp = end |
Instance Method Details
#add(name, value, quantile = false, **labels) ⇒ Object
18 19 20 21 22 23 24 25 26 27 28 |
# File 'lib/gitlab_exporter/prometheus.rb', line 18 def add(name, value, quantile = false, **labels) fail "value '#{value}' must be a number" unless value.is_a?(Numeric) if quantile @quantiles[{ name: name, labels: labels }] << value else @metrics[name] << { value: value, labels: labels, timestamp: (Time.now.to_f * 1000).to_i } end self end |
#to_s ⇒ Object
30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 |
# File 'lib/gitlab_exporter/prometheus.rb', line 30 def to_s add_quantiles_to_metrics buffer = "" @metrics.each do |name, measurements| measurements.each do |measurement| buffer << name.to_s labels = (measurement[:labels] || {}).map { |label, value| "#{label}=\"#{value}\"" }.join(",") buffer << "{#{labels}}" unless labels.empty? buffer << " #{measurement[:value]}" buffer << " #{measurement[:timestamp]}" if @include_timestamp buffer << "\n" end end buffer end |