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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#include <prometheus/registry.h>
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#include <prometheus/counter.h>
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#include <prometheus/save_to_file.h>
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#include <array>
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#include <chrono>
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#include <cstdlib>
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#include <memory>
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#include <string>
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#include <thread>
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#include <iostream>
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int main() {
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using namespace prometheus;
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// for clarity, we deduce the required types
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using Metric = Counter<uint64_t>;
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using Family = Metric::Family;
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// create a metrics registry
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// @note it's the users responsibility to keep the object alive
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std::shared_ptr<Registry> registry_ptr = std::make_shared<Registry>();
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SaveToFile saver( registry_ptr, std::chrono::seconds(5), "./metrics.prom" );
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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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//
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// @note please follow the metric-naming best-practices:
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// https://prometheus.io/docs/practices/naming/
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Family& family { Family::Build(*registry_ptr, "our_metric", "some metric") };
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// add and remember dimensional data, incrementing those is very cheap
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Metric& metric { family.Add({}) };
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for (;; ) {
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std::this_thread::sleep_for(std::chrono::seconds(1));
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const int random_value = std::rand();
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metric += random_value % 10;
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}
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}
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