class PrometheusExporter::Server::ProcessCollector

Constants

MAX_PROCESS_METRIC_AGE
PROCESS_COUNTERS
PROCESS_GAUGES

Public Class Methods

new() click to toggle source
# File lib/prometheus_exporter/server/process_collector.rb, line 23
def initialize
  @process_metrics = []
end

Public Instance Methods

collect(obj) click to toggle source
# File lib/prometheus_exporter/server/process_collector.rb, line 60
def collect(obj)
  now = ::Process.clock_gettime(::Process::CLOCK_MONOTONIC)

  obj["created_at"] = now

  @process_metrics.delete_if do |current|
    (obj["pid"] == current["pid"] && obj["hostname"] == current["hostname"]) ||
      (current["created_at"] + MAX_PROCESS_METRIC_AGE < now)
  end

  @process_metrics << obj
end
metrics() click to toggle source
# File lib/prometheus_exporter/server/process_collector.rb, line 31
def metrics
  return [] if @process_metrics.length == 0

  metrics = {}

  @process_metrics.map do |m|
    metric_key = m["metric_labels"].merge("pid" => m["pid"])
    metric_key.merge!(m["custom_labels"] || {})

    PROCESS_GAUGES.map do |k, help|
      k = k.to_s
      if v = m[k]
        g = metrics[k] ||= PrometheusExporter::Metric::Gauge.new(k, help)
        g.observe(v, metric_key)
      end
    end

    PROCESS_COUNTERS.map do |k, help|
      k = k.to_s
      if v = m[k]
        c = metrics[k] ||= PrometheusExporter::Metric::Counter.new(k, help)
        c.observe(v, metric_key)
      end
    end
  end

  metrics.values
end
type() click to toggle source
# File lib/prometheus_exporter/server/process_collector.rb, line 27
def type
  "process"
end