Add prometheus metrics for Central controllers (#1969)
* add header-only prometheus lib to ext * rename folder * Undo rename directory * prometheus simpleapi included on mac & linux * wip * wire up some controller stats * Get windows building with prometheus * bsd build flags for prometheus * Fix multiple network join from environment entrypoint.sh.release (#1961) * _bond_m guards _bond, not _paths_m (#1965) * Fix: warning: mutex '_aqm_m' is not held on every path through here [-Wthread-safety-analysis] (#1964) * Serve prom metrics from /metrics endpoint * Add prom metrics for Central controller specific things * reorganize metric initialization * testing out a labled gauge on Networks * increment error counter on throw * Consolidate metrics definitions Put all metric definitions into node/Metrics.hpp. Accessed as needed from there. * Revert "testing out a labled gauge on Networks" This reverts commit 499ed6d95e11452019cdf48e32ed4cd878c2705b. * still blows up but adding to the record for completeness right now * Fix runtime issues with metrics * Add metrics files to visual studio project * Missed an "extern" * add copyright headers to new files * Add metrics for sent/received bytes (total) * put /metrics endpoint behind auth * sendto returns int on Win32 --------- Co-authored-by: Leonardo Amaral <leleobhz@users.noreply.github.com> Co-authored-by: Brenton Bostick <bostick@gmail.com>
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ext/prometheus-cpp-lite-1.0/examples/gateway_example.cpp
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ext/prometheus-cpp-lite-1.0/examples/gateway_example.cpp
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#include <chrono>
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#include <iostream>
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#include <memory>
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#include <string>
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#include <thread>
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#include "prometheus/client_metric.h"
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#include "prometheus/counter.h"
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#include "prometheus/family.h"
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#include "prometheus/gateway.h"
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#include "prometheus/registry.h"
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#ifdef _WIN32
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#include <Winsock2.h>
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#else
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#include <unistd.h>
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#endif
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static std::string GetHostName() {
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char hostname[1024];
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if (::gethostname(hostname, sizeof(hostname))) {
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return {};
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}
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return hostname;
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}
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int main() {
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using namespace prometheus;
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// create a push gateway
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const auto labels = Gateway::GetInstanceLabel(GetHostName());
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Gateway gateway{"127.0.0.1", "9091", "sample_client", labels};
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// create a metrics registry with component=main labels applied to all its
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// metrics
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auto registry = std::make_shared<Registry>();
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// add a new counter family to the registry (families combine values with the
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// same name, but distinct label dimensions)
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auto& counter_family = BuildCounter()
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.Name("time_running_seconds_total")
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.Help("How many seconds is this server running?")
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.Labels({{"label", "value"}})
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.Register(*registry);
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// add a counter to the metric family
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auto& second_counter = counter_family.Add(
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{{"another_label", "value"}, {"yet_another_label", "value"}});
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// ask the pusher to push the metrics to the pushgateway
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gateway.RegisterCollectable(registry);
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for (;;) {
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std::this_thread::sleep_for(std::chrono::seconds(1));
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// increment the counter by one (second)
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second_counter.Increment();
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// push metrics
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auto returnCode = gateway.Push();
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std::cout << "returnCode is " << returnCode << std::endl;
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}
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}
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