Class: Sc4ry::Notifiers::Prometheus

Inherits:
Object
  • Object
show all
Defined in:
lib/sc4ry/notifiers/prometheus.rb

Overview

Prometheus notifier class

Constant Summary collapse

@@registry = 
::Prometheus::Client::Registry.new
@@metric_circuit_state = 
::Prometheus::Client::Gauge.new(:cuircuit_state,
docstring: 'Sc4ry metric : state of a circuit',
labels: [:circuit])

Class Method Summary collapse

Class Method Details

.notify(options = {}) ⇒ Bool

send metrics to Prometheus PushGateway

Returns:

  • (Bool) 


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# File 'lib/sc4ry/notifiers/prometheus.rb', line 20

def self.notify(options = {})
  @config = Sc4ry::Notifiers.get(name: :prometheus)[:config]
  status = options[:config][:status][:general]
  circuit = options[:circuit]
  status_map = { open: 0, half_open: 1, closed: 2 }
  if Sc4ry::Helpers.verify_service url: @config[:url]

    @@metric_circuit_state.set(status_map[status], labels: { circuit: circuit.to_s })
    Sc4ry::Helpers.log level: :debug,
                       message: "Prometheus Notifier : notifying for circuit #{circuit}, state : #{status}."

    ::Prometheus::Client::Push.new(job: 'Sc4ry', instance: Socket.gethostname,
                                   gateway: @config[:url]).add(@@registry)
  else
    Sc4ry::Helpers.log level: :warn, message: "Prometheus Notifier : can't notify Push Gateway not reachable."
  end
end