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add /metrics endpoint for exposing root metrics to Prometheus

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Grant Limberg 2020-01-15 16:12:34 -08:00
parent 68ac884d47
commit 95d0944b9f
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GPG Key ID: 2BA62CCABBB4095A
1 changed files with 27 additions and 0 deletions
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27
root/root.cpp
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@ -972,6 +972,33 @@ int main(int argc,char **argv)
res.set_content(o.str(),"text/plain");
});
apiServ.Get("/metrics",[](const httplib::Request &req, httplib::Response &res) {
std::ostringstream o;
int64_t now = OSUtils::now();
char buf[11];
const char *root_id = s_self.address().toString(buf);
o << "# HELP root_peers_online Number of active peers online" << ZT_EOL_S;
o << "# TYPE root_peers_online gauge" << ZT_EOL_S;
s_peersByIdentity_l.lock();
o << "root_peers_online{root_id=\"" << root_id << "\"} " << s_peersByIdentity.size() << ZT_EOL_S;
s_peersByIdentity_l.unlock();
o << "# HELP root_input_rate Input rate MiB/s" << ZT_EOL_S;
o << "# TYPE root_input_rate gauge" << ZT_EOL_S;
o << "root_input_rate{root_id=\"" << root_id << "\"} " << std::setprecision(5) << (s_inputRate.perSecond(now)/1048576.0) << ZT_EOL_S;
o << "# HELP root_output_rate Output rate MiB/s" << ZT_EOL_S;
o << "# TYPE root_output_rate gauge" << ZT_EOL_S;
o << "root_output_rate{root_id=\"" << root_id << "\"} " << std::setprecision(5) << (s_outputRate.perSecond(now)/1048576.0) << ZT_EOL_S;
o << "# HELP root_forwarded_rate Forwarded packet rate MiB/s" << ZT_EOL_S;
o << "# TYPE root_forwarded_rate gauge" << ZT_EOL_S;
o << "root_forwarded_rate{root_id=\"" << root_id << "\"} " << std::setprecision(5) << (s_forwardRate.perSecond(now)/1048576.0) << ZT_EOL_S;
o << "# HELP root_discarded_rate Discarded forwards MiB/s" << ZT_EOL_S;
o << "# TYPE root_discarded_rate gauge" << ZT_EOL_S;
o << "root_discarded_rate{root_id=\"" << root_id << "\"} " << std::setprecision(5) << (s_discardedForwardRate.perSecond(now)/1048576.0) << ZT_EOL_S;
res.set_content(o.str(), "text/plain");
});
// Peer list for compatibility with software that monitors regular nodes
apiServ.Get("/peer",[](const httplib::Request &req,httplib::Response &res) {
char tmp[256];