43 lines
1016 B
Ruby
43 lines
1016 B
Ruby
# frozen_string_literal: true
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module Gitlab
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module HealthChecks
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class PrometheusTextFormat
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def marshal(metrics)
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"#{metrics_with_type_declarations(metrics).join("\n")}\n"
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end
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private
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def metrics_with_type_declarations(metrics)
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type_declaration_added = {}
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metrics.flat_map do |metric|
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metric_lines = []
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unless type_declaration_added.key?(metric.name)
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type_declaration_added[metric.name] = true
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metric_lines << metric_type_declaration(metric)
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end
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metric_lines << metric_text(metric)
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end
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end
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def metric_type_declaration(metric)
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"# TYPE #{metric.name} gauge"
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end
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def metric_text(metric)
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labels = metric.labels&.map { |key, value| "#{key}=\"#{value}\"" }&.join(',') || ''
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if labels.empty?
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"#{metric.name} #{metric.value}"
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else
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"#{metric.name}{#{labels}} #{metric.value}"
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end
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end
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end
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end
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end
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