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#include <chrono>
#include <iostream>
#include <memory>
#include <string>
#include <thread>
#include "prometheus/client_metric.h"
#include "prometheus/counter.h"
#include "prometheus/family.h"
#include "prometheus/gateway.h"
#include "prometheus/registry.h"
#ifdef _WIN32
#include <Winsock2.h>
#else
#include <unistd.h>
#endif
static std::string GetHostName() {
char hostname[1024];
if (::gethostname(hostname, sizeof(hostname))) {
return {};
}
return hostname;
}
int main() {
using namespace prometheus;
// create a push gateway
const auto labels = Gateway::GetInstanceLabel(GetHostName());
Gateway gateway{"127.0.0.1", "9091", "sample_client", labels};
// create a metrics registry with component=main labels applied to all its
// metrics
auto registry = std::make_shared<Registry>();
// add a new counter family to the registry (families combine values with the
// same name, but distinct label dimensions)
auto& counter_family = BuildCounter()
.Name("time_running_seconds_total")
.Help("How many seconds is this server running?")
.Labels({{"label", "value"}})
.Register(*registry);
// add a counter to the metric family
auto& second_counter = counter_family.Add(
{{"another_label", "value"}, {"yet_another_label", "value"}});
// ask the pusher to push the metrics to the pushgateway
gateway.RegisterCollectable(registry);
for (;;) {
std::this_thread::sleep_for(std::chrono::seconds(1));
// increment the counter by one (second)
second_counter.Increment();
// push metrics
auto returnCode = gateway.Push();
std::cout << "returnCode is " << returnCode << std::endl;
}
return 0;
}
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