Class: Etna::MetricsExporter

Inherits:
Object
  • Object
show all
Defined in:
lib/etna/metrics.rb

Instance Method Summary collapse

Constructor Details

#initialize(app, path: '/metrics') ⇒ MetricsExporter

Returns a new instance of MetricsExporter.



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# File 'lib/etna/metrics.rb', line 4

def initialize(app, path: '/metrics')
  @app = app
  @path = path
end

Instance Method Details

#call(env) ⇒ Object 



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# File 'lib/etna/metrics.rb', line 18

def call(env)
  if env['PATH_INFO'] == @path
    exporter.call(env)
  else
    @app.call(env)
  end
end

#exporter ⇒ Object 



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# File 'lib/etna/metrics.rb', line 9

def exporter
  @exporter ||= begin
    exporter = Yabeda::Prometheus::Exporter.new(@app, path: @path)
    Rack::Auth::Basic.new(exporter) do |user, pw|
      user == 'prometheus' && pw == ENV['METRICS_PW']
    end
  end
end