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Add more Prometheus metrics (#12274)

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sfan5 2022-05-09 21:20:58 +02:00 • committed by GitHub
parent c2898f53bc
commit f5a8593b11
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10 changed files with 225 additions and 120 deletions
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95
src/util/metricsbackend.cpp
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@ -18,6 +18,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
*/
#include "metricsbackend.h"
#include "util/thread.h"
#if USE_PROMETHEUS
#include <prometheus/exposer.h>
#include <prometheus/registry.h>
@ -27,18 +28,78 @@ with this program; if not, write to the Free Software Foundation, Inc.,
#include "settings.h"
#endif
MetricCounterPtr MetricsBackend::addCounter(
const std::string &name, const std::string &help_str)
/* Plain implementation */
class SimpleMetricCounter : public MetricCounter
{
return std::make_shared<SimpleMetricCounter>(name, help_str);
public:
SimpleMetricCounter() : MetricCounter(), m_counter(0.0) {}
virtual ~SimpleMetricCounter() {}
void increment(double number) override
{
MutexAutoLock lock(m_mutex);
m_counter += number;
}
double get() const override
{
MutexAutoLock lock(m_mutex);
return m_counter;
}
private:
mutable std::mutex m_mutex;
double m_counter;
};
class SimpleMetricGauge : public MetricGauge
{
public:
SimpleMetricGauge() : MetricGauge(), m_gauge(0.0) {}
virtual ~SimpleMetricGauge() {}
void increment(double number) override
{
MutexAutoLock lock(m_mutex);
m_gauge += number;
}
void decrement(double number) override
{
MutexAutoLock lock(m_mutex);
m_gauge -= number;
}
void set(double number) override
{
MutexAutoLock lock(m_mutex);
m_gauge = number;
}
double get() const override
{
MutexAutoLock lock(m_mutex);
return m_gauge;
}
private:
mutable std::mutex m_mutex;
double m_gauge;
};
MetricCounterPtr MetricsBackend::addCounter(
const std::string &name, const std::string &help_str, Labels labels)
{
return std::make_shared<SimpleMetricCounter>();
}
MetricGaugePtr MetricsBackend::addGauge(
const std::string &name, const std::string &help_str)
const std::string &name, const std::string &help_str, Labels labels)
{
return std::make_shared<SimpleMetricGauge>(name, help_str);
return std::make_shared<SimpleMetricGauge>();
}
/* Prometheus backend */
#if USE_PROMETHEUS
class PrometheusMetricCounter : public MetricCounter
@ -47,13 +108,14 @@ public:
PrometheusMetricCounter() = delete;
PrometheusMetricCounter(const std::string &name, const std::string &help_str,
MetricsBackend::Labels labels,
std::shared_ptr<prometheus::Registry> registry) :
MetricCounter(),
m_family(prometheus::BuildCounter()
.Name(name)
.Help(help_str)
.Register(*registry)),
m_counter(m_family.Add({}))
m_counter(m_family.Add(labels))
{
}
@ -73,13 +135,14 @@ public:
PrometheusMetricGauge() = delete;
PrometheusMetricGauge(const std::string &name, const std::string &help_str,
MetricsBackend::Labels labels,
std::shared_ptr<prometheus::Registry> registry) :
MetricGauge(),
m_family(prometheus::BuildGauge()
.Name(name)
.Help(help_str)
.Register(*registry)),
m_gauge(m_family.Add({}))
m_gauge(m_family.Add(labels))
{
}
@ -107,10 +170,12 @@ public:
virtual ~PrometheusMetricsBackend() {}
virtual MetricCounterPtr addCounter(
const std::string &name, const std::string &help_str);
virtual MetricGaugePtr addGauge(
const std::string &name, const std::string &help_str);
MetricCounterPtr addCounter(
const std::string &name, const std::string &help_str,
Labels labels = {}) override;
MetricGaugePtr addGauge(
const std::string &name, const std::string &help_str,
Labels labels = {}) override;
private:
std::unique_ptr<prometheus::Exposer> m_exposer;
@ -118,15 +183,15 @@ private:
};
MetricCounterPtr PrometheusMetricsBackend::addCounter(
const std::string &name, const std::string &help_str)
const std::string &name, const std::string &help_str, Labels labels)
{
return std::make_shared<PrometheusMetricCounter>(name, help_str, m_registry);
return std::make_shared<PrometheusMetricCounter>(name, help_str, labels, m_registry);
}
MetricGaugePtr PrometheusMetricsBackend::addGauge(
const std::string &name, const std::string &help_str)
const std::string &name, const std::string &help_str, Labels labels)
{
return std::make_shared<PrometheusMetricGauge>(name, help_str, m_registry);
return std::make_shared<PrometheusMetricGauge>(name, help_str, labels, m_registry);
}
MetricsBackend *createPrometheusMetricsBackend()