79 lines
2.6 KiB
Ruby
79 lines
2.6 KiB
Ruby
# frozen_string_literal: true
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module Gitlab
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module Metrics
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class RequestsRackMiddleware
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HTTP_METHODS = %w(delete get head options patch post put).to_set.freeze
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HEALTH_ENDPOINT = /^\/-\/(liveness|readiness|health|metrics)\/?$/.freeze
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FEATURE_CATEGORY_HEADER = 'X-Gitlab-Feature-Category'
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FEATURE_CATEGORY_DEFAULT = 'unknown'
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def initialize(app)
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@app = app
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end
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def self.http_request_total
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@http_request_total ||= ::Gitlab::Metrics.counter(:http_requests_total, 'Request count')
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end
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def self.rack_uncaught_errors_count
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@rack_uncaught_errors_count ||= ::Gitlab::Metrics.counter(:rack_uncaught_errors_total, 'Request handling uncaught errors count')
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end
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def self.http_request_duration_seconds
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@http_request_duration_seconds ||= ::Gitlab::Metrics.histogram(:http_request_duration_seconds, 'Request handling execution time',
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{}, [0.05, 0.1, 0.25, 0.5, 0.7, 1, 2.5, 5, 10, 25])
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end
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def self.http_health_requests_total
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@http_health_requests_total ||= ::Gitlab::Metrics.counter(:http_health_requests_total, 'Health endpoint request count')
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end
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def self.initialize_http_request_duration_seconds
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HTTP_METHODS.each do |method|
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http_request_duration_seconds.get({ method: method })
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end
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end
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def call(env)
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method = env['REQUEST_METHOD'].downcase
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method = 'INVALID' unless HTTP_METHODS.include?(method)
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started = Time.now.to_f
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health_endpoint = health_endpoint?(env['PATH_INFO'])
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status = 'undefined'
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feature_category = nil
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begin
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status, headers, body = @app.call(env)
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elapsed = Time.now.to_f - started
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feature_category = headers&.fetch(FEATURE_CATEGORY_HEADER, nil)
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unless health_endpoint
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RequestsRackMiddleware.http_request_duration_seconds.observe({ method: method }, elapsed)
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end
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[status, headers, body]
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rescue
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RequestsRackMiddleware.rack_uncaught_errors_count.increment
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raise
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ensure
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if health_endpoint
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RequestsRackMiddleware.http_health_requests_total.increment(status: status, method: method)
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else
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RequestsRackMiddleware.http_request_total.increment(status: status, method: method, feature_category: feature_category || FEATURE_CATEGORY_DEFAULT)
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end
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end
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end
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def health_endpoint?(path)
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return false if path.blank?
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HEALTH_ENDPOINT.match?(CGI.unescape(path))
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end
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end
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end
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end
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