17765900968

Committed 16 Sep 2025 12:33PM UTC coverage: 65.987% (-0.04%) from 66.029%

Build # 17765900968

Build Type

Pull #16108

github

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web-flow

Commit Message

Merge 4059c5fe8 into 2e297650d

Pull Request Pull Request #16108: dnsdist: implement simple packet shuffle in cache

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61.9

/pdns/dnsdistdist/dnsdist-carbon.cc

/*
 * This file is part of PowerDNS or dnsdist.
 * Copyright -- PowerDNS.COM B.V. and its contributors
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of version 2 of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * In addition, for the avoidance of any doubt, permission is granted to
 * link this program with OpenSSL and to (re)distribute the binaries
 * produced as the result of such linking.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include "dnsdist-carbon.hh"
#include "dnsdist-cache.hh"
#include "dnsdist.hh"
#include "dnsdist-backoff.hh"
#include "dnsdist-configuration.hh"
#include "dnsdist-frontend.hh"
#include "dnsdist-metrics.hh"

#ifndef DISABLE_CARBON
#include "dolog.hh"
#include "sstuff.hh"
#include "threadname.hh"

namespace dnsdist
{

static bool doOneCarbonExport(const Carbon::Endpoint& endpoint)
{
  const auto& server = endpoint.server;
  const std::string& namespace_name = endpoint.namespace_name;
  const std::string& hostname = endpoint.ourname;
  const std::string& instance_name = endpoint.instance_name;

  try {
    Socket carbonSock(server.sin4.sin_family, SOCK_STREAM);
    carbonSock.setNonBlocking();
    carbonSock.connect(server); // we do the connect so the attempt happens while we gather stats
    ostringstream str;

    const time_t now = time(nullptr);

    {
      auto entries = dnsdist::metrics::g_stats.entries.read_lock();
      for (const auto& entry : *entries) {
        // Skip non-empty labels, since labels are not supported in Carbon
        if (!entry.d_labels.empty()) {
          continue;
        }

        str << namespace_name << "." << hostname << "." << instance_name << "." << entry.d_name << ' ';
        if (const auto& val = std::get_if<pdns::stat_t*>(&entry.d_value)) {
          str << (*val)->load();
        }
        else if (const auto& adval = std::get_if<pdns::stat_double_t*>(&entry.d_value)) {
          str << (*adval)->load();
        }
        else if (const auto& func = std::get_if<dnsdist::metrics::Stats::statfunction_t>(&entry.d_value)) {
          str << (*func)(entry.d_name);
        }
        str << ' ' << now << "\r\n";
      }
    }

    for (const auto& state : dnsdist::configuration::getCurrentRuntimeConfiguration().d_backends) {
      string serverName = state->getName().empty() ? state->d_config.remote.toStringWithPort() : state->getName();
      std::replace(serverName.begin(), serverName.end(), '.', '_');
      string base = namespace_name;
      base += ".";
      base += hostname;
      base += ".";
      base += instance_name;
      base += ".servers.";
      base += serverName;
      base += ".";
      str << base << "queries" << ' ' << state->queries.load() << " " << now << "\r\n";
      str << base << "responses" << ' ' << state->responses.load() << " " << now << "\r\n";
      str << base << "drops" << ' ' << state->reuseds.load() << " " << now << "\r\n";
      str << base << "latency" << ' ' << (state->d_config.d_availability != DownstreamState::Availability::Down ? state->latencyUsec / 1000.0 : 0) << " " << now << "\r\n";
      str << base << "latencytcp" << ' ' << (state->d_config.d_availability != DownstreamState::Availability::Down ? state->latencyUsecTCP / 1000.0 : 0) << " " << now << "\r\n";
      str << base << "senderrors" << ' ' << state->sendErrors.load() << " " << now << "\r\n";
      str << base << "outstanding" << ' ' << state->outstanding.load() << " " << now << "\r\n";
      str << base << "tcpdiedsendingquery" << ' ' << state->tcpDiedSendingQuery.load() << " " << now << "\r\n";
      str << base << "tcpdiedreaddingresponse" << ' ' << state->tcpDiedReadingResponse.load() << " " << now << "\r\n";
      str << base << "tcpgaveup" << ' ' << state->tcpGaveUp.load() << " " << now << "\r\n";
      str << base << "tcpreadimeouts" << ' ' << state->tcpReadTimeouts.load() << " " << now << "\r\n";
      str << base << "tcpwritetimeouts" << ' ' << state->tcpWriteTimeouts.load() << " " << now << "\r\n";
      str << base << "tcpconnecttimeouts" << ' ' << state->tcpConnectTimeouts.load() << " " << now << "\r\n";
      str << base << "tcpcurrentconnections" << ' ' << state->tcpCurrentConnections.load() << " " << now << "\r\n";
      str << base << "tcpmaxconcurrentconnections" << ' ' << state->tcpMaxConcurrentConnections.load() << " " << now << "\r\n";
      str << base << "tcpnewconnections" << ' ' << state->tcpNewConnections.load() << " " << now << "\r\n";
      str << base << "tcpreusedconnections" << ' ' << state->tcpReusedConnections.load() << " " << now << "\r\n";
      str << base << "tlsresumptions" << ' ' << state->tlsResumptions.load() << " " << now << "\r\n";
      str << base << "tcpavgqueriesperconnection" << ' ' << state->tcpAvgQueriesPerConnection.load() << " " << now << "\r\n";
      str << base << "tcpavgconnectionduration" << ' ' << state->tcpAvgConnectionDuration.load() << " " << now << "\r\n";
      str << base << "tcptoomanyconcurrentconnections" << ' ' << state->tcpTooManyConcurrentConnections.load() << " " << now << "\r\n";
      str << base << "healthcheckfailures" << ' ' << state->d_healthCheckMetrics.d_failures << " " << now << "\r\n";
      str << base << "healthcheckfailuresparsing" << ' ' << state->d_healthCheckMetrics.d_parseErrors << " " << now << "\r\n";
      str << base << "healthcheckfailurestimeout" << ' ' << state->d_healthCheckMetrics.d_timeOuts << " " << now << "\r\n";
      str << base << "healthcheckfailuresnetwork" << ' ' << state->d_healthCheckMetrics.d_networkErrors << " " << now << "\r\n";
      str << base << "healthcheckfailuresmismatch" << ' ' << state->d_healthCheckMetrics.d_mismatchErrors << " " << now << "\r\n";
      str << base << "healthcheckfailuresinvalid" << ' ' << state->d_healthCheckMetrics.d_invalidResponseErrors << " " << now << "\r\n";
    }

    std::map<std::string, uint64_t> frontendDuplicates;
    for (const auto& front : dnsdist::getFrontends()) {
      if (front->udpFD == -1 && front->tcpFD == -1) {
        continue;
      }

      string frontName = front->local.toStringWithPort() + (front->udpFD >= 0 ? "_udp" : "_tcp");
      std::replace(frontName.begin(), frontName.end(), '.', '_');
      auto dupPair = frontendDuplicates.insert({frontName, 1});
      if (!dupPair.second) {
        frontName += "_" + std::to_string(dupPair.first->second);
        ++(dupPair.first->second);
      }

      string base = namespace_name;
      base += ".";
      base += hostname;
      base += ".";
      base += instance_name;
      base += ".frontends.";
      base += frontName;
      base += ".";
      str << base << "queries" << ' ' << front->queries.load() << " " << now << "\r\n";
      str << base << "responses" << ' ' << front->responses.load() << " " << now << "\r\n";
      str << base << "tcpdiedreadingquery" << ' ' << front->tcpDiedReadingQuery.load() << " " << now << "\r\n";
      str << base << "tcpdiedsendingresponse" << ' ' << front->tcpDiedSendingResponse.load() << " " << now << "\r\n";
      str << base << "tcpgaveup" << ' ' << front->tcpGaveUp.load() << " " << now << "\r\n";
      str << base << "tcpclienttimeouts" << ' ' << front->tcpClientTimeouts.load() << " " << now << "\r\n";
      str << base << "tcpdownstreamtimeouts" << ' ' << front->tcpDownstreamTimeouts.load() << " " << now << "\r\n";
      str << base << "tcpcurrentconnections" << ' ' << front->tcpCurrentConnections.load() << " " << now << "\r\n";
      str << base << "tcpmaxconcurrentconnections" << ' ' << front->tcpMaxConcurrentConnections.load() << " " << now << "\r\n";
      str << base << "tcpavgqueriesperconnection" << ' ' << front->tcpAvgQueriesPerConnection.load() << " " << now << "\r\n";
      str << base << "tcpavgconnectionduration" << ' ' << front->tcpAvgConnectionDuration.load() << " " << now << "\r\n";
      str << base << "tcpavgreadios" << ' ' << front->tcpAvgIOsPerConnection.load() << " " << now << "\r\n";
      str << base << "tls10-queries" << ' ' << front->tls10queries.load() << " " << now << "\r\n";
      str << base << "tls11-queries" << ' ' << front->tls11queries.load() << " " << now << "\r\n";
      str << base << "tls12-queries" << ' ' << front->tls12queries.load() << " " << now << "\r\n";
      str << base << "tls13-queries" << ' ' << front->tls13queries.load() << " " << now << "\r\n";
      str << base << "tls-unknown-queries" << ' ' << front->tlsUnknownqueries.load() << " " << now << "\r\n";
      str << base << "tlsnewsessions" << ' ' << front->tlsNewSessions.load() << " " << now << "\r\n";
      str << base << "tlsresumptions" << ' ' << front->tlsResumptions.load() << " " << now << "\r\n";
      str << base << "tlsunknownticketkeys" << ' ' << front->tlsUnknownTicketKey.load() << " " << now << "\r\n";
      str << base << "tlsinactiveticketkeys" << ' ' << front->tlsInactiveTicketKey.load() << " " << now << "\r\n";

      const TLSErrorCounters* errorCounters = nullptr;
      if (front->tlsFrontend != nullptr) {
        errorCounters = &front->tlsFrontend->d_tlsCounters;
      }
      else if (front->dohFrontend != nullptr) {
        errorCounters = &front->dohFrontend->d_tlsContext->d_tlsCounters;
      }
      if (errorCounters != nullptr) {
        str << base << "tlsdhkeytoosmall" << ' ' << errorCounters->d_dhKeyTooSmall << " " << now << "\r\n";
        str << base << "tlsinappropriatefallback" << ' ' << errorCounters->d_inappropriateFallBack << " " << now << "\r\n";
        str << base << "tlsnosharedcipher" << ' ' << errorCounters->d_noSharedCipher << " " << now << "\r\n";
        str << base << "tlsunknownciphertype" << ' ' << errorCounters->d_unknownCipherType << " " << now << "\r\n";
        str << base << "tlsunknownkeyexchangetype" << ' ' << errorCounters->d_unknownKeyExchangeType << " " << now << "\r\n";
        str << base << "tlsunknownprotocol" << ' ' << errorCounters->d_unknownProtocol << " " << now << "\r\n";
        str << base << "tlsunsupportedec" << ' ' << errorCounters->d_unsupportedEC << " " << now << "\r\n";
        str << base << "tlsunsupportedprotocol" << ' ' << errorCounters->d_unsupportedProtocol << " " << now << "\r\n";
      }
    }

    for (const auto& entry : dnsdist::configuration::getCurrentRuntimeConfiguration().d_pools) {
      string poolName = entry.first;
      std::replace(poolName.begin(), poolName.end(), '.', '_');
      if (poolName.empty()) {
        poolName = "_default_";
      }
      string base = namespace_name;
      base += ".";
      base += hostname;
      base += ".";
      base += instance_name;
      base += ".pools.";
      base += poolName;
      base += ".";
      const std::shared_ptr<ServerPool> pool = entry.second;
      str << base << "servers"
          << " " << pool->countServers(false) << " " << now << "\r\n";
      str << base << "servers-up"
          << " " << pool->countServers(true) << " " << now << "\r\n";
      if (pool->packetCache != nullptr) {
        const auto& cache = pool->packetCache;
        str << base << "cache-size"
            << " " << cache->getMaxEntries() << " " << now << "\r\n";
        str << base << "cache-entries"
            << " " << cache->getEntriesCount() << " " << now << "\r\n";
        str << base << "cache-hits"
            << " " << cache->getHits() << " " << now << "\r\n";
        str << base << "cache-misses"
            << " " << cache->getMisses() << " " << now << "\r\n";
        str << base << "cache-deferred-inserts"
            << " " << cache->getDeferredInserts() << " " << now << "\r\n";
        str << base << "cache-deferred-lookups"
            << " " << cache->getDeferredLookups() << " " << now << "\r\n";
        str << base << "cache-lookup-collisions"
            << " " << cache->getLookupCollisions() << " " << now << "\r\n";
        str << base << "cache-insert-collisions"
            << " " << cache->getInsertCollisions() << " " << now << "\r\n";
        str << base << "cache-ttl-too-shorts"
            << " " << cache->getTTLTooShorts() << " " << now << "\r\n";
        str << base << "cache-cleanup-count"
            << " " << cache->getCleanupCount() << " " << now << "\r\n";
      }
    }

#ifdef HAVE_DNS_OVER_HTTPS
    {
      std::map<std::string, uint64_t> dohFrontendDuplicates;
      const string base = "dnsdist." + hostname + ".main.doh.";
      for (const auto& doh : dnsdist::getDoHFrontends()) {
        string name = doh->d_tlsContext->d_addr.toStringWithPort();
        std::replace(name.begin(), name.end(), '.', '_');
        std::replace(name.begin(), name.end(), ':', '_');
        std::replace(name.begin(), name.end(), '[', '_');
        std::replace(name.begin(), name.end(), ']', '_');

        auto dupPair = dohFrontendDuplicates.insert({name, 1});
        if (!dupPair.second) {
          name += "_" + std::to_string(dupPair.first->second);
          ++(dupPair.first->second);
        }

        const vector<pair<const char*, const pdns::stat_t&>> values{
          {"http-connects", doh->d_httpconnects},
          {"http1-queries", doh->d_http1Stats.d_nbQueries},
          {"http2-queries", doh->d_http2Stats.d_nbQueries},
          {"http1-200-responses", doh->d_http1Stats.d_nb200Responses},
          {"http2-200-responses", doh->d_http2Stats.d_nb200Responses},
          {"http1-400-responses", doh->d_http1Stats.d_nb400Responses},
          {"http2-400-responses", doh->d_http2Stats.d_nb400Responses},
          {"http1-403-responses", doh->d_http1Stats.d_nb403Responses},
          {"http2-403-responses", doh->d_http2Stats.d_nb403Responses},
          {"http1-500-responses", doh->d_http1Stats.d_nb500Responses},
          {"http2-500-responses", doh->d_http2Stats.d_nb500Responses},
          {"http1-502-responses", doh->d_http1Stats.d_nb502Responses},
          {"http2-502-responses", doh->d_http2Stats.d_nb502Responses},
          {"http1-other-responses", doh->d_http1Stats.d_nbOtherResponses},
          {"http2-other-responses", doh->d_http2Stats.d_nbOtherResponses},
          {"get-queries", doh->d_getqueries},
          {"post-queries", doh->d_postqueries},
          {"bad-requests", doh->d_badrequests},
          {"error-responses", doh->d_errorresponses},
          {"redirect-responses", doh->d_redirectresponses},
          {"valid-responses", doh->d_validresponses}};

        for (const auto& item : values) {
          str << base << name << "." << item.first << " " << item.second << " " << now << "\r\n";
        }
      }
    }
#endif /* HAVE_DNS_OVER_HTTPS */

    {
      std::string qname;
      auto records = dnsdist::QueryCount::g_queryCountRecords.write_lock();
      for (const auto& record : *records) {
        qname = record.first;
        std::replace(qname.begin(), qname.end(), '.', '_');
        str << "dnsdist.querycount." << qname << ".queries " << record.second << " " << now << "\r\n";
      }
      records->clear();
    }

    const string msg = str.str();

    int ret = waitForRWData(carbonSock.getHandle(), false, 1, 0);
    if (ret <= 0) {
      vinfolog("Unable to write data to carbon server on %s: %s", server.toStringWithPort(), (ret < 0 ? stringerror() : "Timeout"));
      return false;
    }
    carbonSock.setBlocking();
    writen2(carbonSock.getHandle(), msg.c_str(), msg.size());
  }
  catch (const std::exception& e) {
    warnlog("Problem sending carbon data to %s: %s", server.toStringWithPort(), e.what());
    return false;
  }

  return true;
}

static void carbonHandler(const Carbon::Endpoint& endpoint)
{
  setThreadName("dnsdist/carbon");
  const auto intervalUSec = endpoint.interval * 1000 * 1000;
  /* maximum interval between two attempts is 10 minutes */
  const ExponentialBackOffTimer backOffTimer(10 * 60);

  try {
    uint8_t consecutiveFailures = 0;
    do {
      dnsdist::configuration::refreshLocalRuntimeConfiguration();

      DTime dtimer;
      dtimer.set();
      if (doOneCarbonExport(endpoint)) {
        const auto elapsedUSec = dtimer.udiff();
        if (elapsedUSec < 0 || static_cast<unsigned int>(elapsedUSec) <= intervalUSec) {
          useconds_t toSleepUSec = intervalUSec - elapsedUSec;
          usleep(toSleepUSec);
        }
        else {
          vinfolog("Carbon export for %s took longer (%s us) than the configured interval (%d us)", endpoint.server.toStringWithPort(), elapsedUSec, intervalUSec);
        }
        consecutiveFailures = 0;
      }
      else {
        const auto backOff = backOffTimer.get(consecutiveFailures);
        if (consecutiveFailures < std::numeric_limits<decltype(consecutiveFailures)>::max()) {
          consecutiveFailures++;
        }
        vinfolog("Run for %s - %s failed, next attempt in %d", endpoint.server.toStringWithPort(), endpoint.ourname, backOff);
        std::this_thread::sleep_for(std::chrono::seconds(backOff));
      }
    } while (true);
  }
  catch (const PDNSException& e) {
    errlog("Carbon thread for %s died, PDNSException: %s", endpoint.server.toStringWithPort(), e.reason);
  }
  catch (...) {
    errlog("Carbon thread for %s died", endpoint.server.toStringWithPort());
  }
}

Carbon::Endpoint Carbon::newEndpoint(const std::string& address, std::string ourName, uint64_t interval, const std::string& namespace_name, const std::string& instance_name)
{
  if (ourName.empty()) {
    try {
      ourName = getCarbonHostName();
    }
    catch (const std::exception& exp) {
      throw std::runtime_error(std::string("The 'ourname' setting in 'carbonServer()' has not been set and we are unable to determine the system's hostname: ") + exp.what());
    }
  }
  return Carbon::Endpoint{ComboAddress(address, 2003),
                          !namespace_name.empty() ? namespace_name : "dnsdist",
                          std::move(ourName),
                          !instance_name.empty() ? instance_name : "main",
                          interval < std::numeric_limits<unsigned int>::max() ? static_cast<unsigned int>(interval) : 30};
}

void Carbon::run(const std::vector<Carbon::Endpoint>& endpoints)
{
  for (const auto& endpoint : endpoints) {
    std::thread newHandler(carbonHandler, endpoint);
    newHandler.detach();
  }
}

}
#endif /* DISABLE_CARBON */

static const time_t s_start = time(nullptr);

uint64_t uptimeOfProcess(const std::string& str)
{
  (void)str;
  return time(nullptr) - s_start;
}

1	/*
2	* This file is part of PowerDNS or dnsdist.
3	* Copyright -- PowerDNS.COM B.V. and its contributors
4	*
5	* This program is free software; you can redistribute it and/or modify
6	* it under the terms of version 2 of the GNU General Public License as
7	* published by the Free Software Foundation.
8	*
9	* In addition, for the avoidance of any doubt, permission is granted to
10	* link this program with OpenSSL and to (re)distribute the binaries
11	* produced as the result of such linking.
12	*
13	* This program is distributed in the hope that it will be useful,
14	* but WITHOUT ANY WARRANTY; without even the implied warranty of
15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16	* GNU General Public License for more details.
17	*
18	* You should have received a copy of the GNU General Public License
19	* along with this program; if not, write to the Free Software
20	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
21	*/
22	#ifdef HAVE_CONFIG_H
23	#include "config.h"
24	#endif
25
26	#include "dnsdist-carbon.hh"
27	#include "dnsdist-cache.hh"
28	#include "dnsdist.hh"
29	#include "dnsdist-backoff.hh"
30	#include "dnsdist-configuration.hh"
31	#include "dnsdist-frontend.hh"
32	#include "dnsdist-metrics.hh"
33
34	#ifndef DISABLE_CARBON
35	#include "dolog.hh"
36	#include "sstuff.hh"
37	#include "threadname.hh"
38
39	namespace dnsdist
40	{
41
42	static bool doOneCarbonExport(const Carbon::Endpoint& endpoint)
43	{	8✔
44	const auto& server = endpoint.server;	8✔
45	const std::string& namespace_name = endpoint.namespace_name;	8✔
46	const std::string& hostname = endpoint.ourname;	8✔
47	const std::string& instance_name = endpoint.instance_name;	8✔
48
49	try {	8✔
50	Socket carbonSock(server.sin4.sin_family, SOCK_STREAM);	8✔
51	carbonSock.setNonBlocking();	8✔
52	carbonSock.connect(server); // we do the connect so the attempt happens while we gather stats	8✔
53	ostringstream str;	8✔
54
55	const time_t now = time(nullptr);	8✔
56
57	{	8✔
58	auto entries = dnsdist::metrics::g_stats.entries.read_lock();	8✔
59	for (const auto& entry : *entries) {	688✔
60	// Skip non-empty labels, since labels are not supported in Carbon
61	if (!entry.d_labels.empty()) {	688!
62	continue;	×
63	}	×
64
65	str << namespace_name << "." << hostname << "." << instance_name << "." << entry.d_name << ' ';	688✔
66	if (const auto& val = std::get_if<pdns::stat_t*>(&entry.d_value)) {	688✔
67	str << (*val)->load();	336✔
68	}	336✔
69	else if (const auto& adval = std::get_if<pdns::stat_double_t*>(&entry.d_value)) {	352✔
70	str << (*adval)->load();	192✔
71	}	192✔
72	else if (const auto& func = std::get_if<dnsdist::metrics::Stats::statfunction_t>(&entry.d_value)) {	160!
73	str << (*func)(entry.d_name);	160✔
74	}	160✔
75	str << ' ' << now << "\r\n";	688✔
76	}	688✔
77	}	8✔
78
79	for (const auto& state : dnsdist::configuration::getCurrentRuntimeConfiguration().d_backends) {	24✔
80	string serverName = state->getName().empty() ? state->d_config.remote.toStringWithPort() : state->getName();	24!
81	std::replace(serverName.begin(), serverName.end(), '.', '_');	24✔
82	string base = namespace_name;	24✔
83	base += ".";	24✔
84	base += hostname;	24✔
85	base += ".";	24✔
86	base += instance_name;	24✔
87	base += ".servers.";	24✔
88	base += serverName;	24✔
89	base += ".";	24✔
90	str << base << "queries" << ' ' << state->queries.load() << " " << now << "\r\n";	24✔
91	str << base << "responses" << ' ' << state->responses.load() << " " << now << "\r\n";	24✔
92	str << base << "drops" << ' ' << state->reuseds.load() << " " << now << "\r\n";	24✔
93	str << base << "latency" << ' ' << (state->d_config.d_availability != DownstreamState::Availability::Down ? state->latencyUsec / 1000.0 : 0) << " " << now << "\r\n";	24✔
94	str << base << "latencytcp" << ' ' << (state->d_config.d_availability != DownstreamState::Availability::Down ? state->latencyUsecTCP / 1000.0 : 0) << " " << now << "\r\n";	24✔
95	str << base << "senderrors" << ' ' << state->sendErrors.load() << " " << now << "\r\n";	24✔
96	str << base << "outstanding" << ' ' << state->outstanding.load() << " " << now << "\r\n";	24✔
97	str << base << "tcpdiedsendingquery" << ' ' << state->tcpDiedSendingQuery.load() << " " << now << "\r\n";	24✔
98	str << base << "tcpdiedreaddingresponse" << ' ' << state->tcpDiedReadingResponse.load() << " " << now << "\r\n";	24✔
99	str << base << "tcpgaveup" << ' ' << state->tcpGaveUp.load() << " " << now << "\r\n";	24✔
100	str << base << "tcpreadimeouts" << ' ' << state->tcpReadTimeouts.load() << " " << now << "\r\n";	24✔
101	str << base << "tcpwritetimeouts" << ' ' << state->tcpWriteTimeouts.load() << " " << now << "\r\n";	24✔
102	str << base << "tcpconnecttimeouts" << ' ' << state->tcpConnectTimeouts.load() << " " << now << "\r\n";	24✔
103	str << base << "tcpcurrentconnections" << ' ' << state->tcpCurrentConnections.load() << " " << now << "\r\n";	24✔
104	str << base << "tcpmaxconcurrentconnections" << ' ' << state->tcpMaxConcurrentConnections.load() << " " << now << "\r\n";	24✔
105	str << base << "tcpnewconnections" << ' ' << state->tcpNewConnections.load() << " " << now << "\r\n";	24✔
106	str << base << "tcpreusedconnections" << ' ' << state->tcpReusedConnections.load() << " " << now << "\r\n";	24✔
107	str << base << "tlsresumptions" << ' ' << state->tlsResumptions.load() << " " << now << "\r\n";	24✔
108	str << base << "tcpavgqueriesperconnection" << ' ' << state->tcpAvgQueriesPerConnection.load() << " " << now << "\r\n";	24✔
109	str << base << "tcpavgconnectionduration" << ' ' << state->tcpAvgConnectionDuration.load() << " " << now << "\r\n";	24✔
110	str << base << "tcptoomanyconcurrentconnections" << ' ' << state->tcpTooManyConcurrentConnections.load() << " " << now << "\r\n";	24✔
111	str << base << "healthcheckfailures" << ' ' << state->d_healthCheckMetrics.d_failures << " " << now << "\r\n";	24✔
112	str << base << "healthcheckfailuresparsing" << ' ' << state->d_healthCheckMetrics.d_parseErrors << " " << now << "\r\n";	24✔
113	str << base << "healthcheckfailurestimeout" << ' ' << state->d_healthCheckMetrics.d_timeOuts << " " << now << "\r\n";	24✔
114	str << base << "healthcheckfailuresnetwork" << ' ' << state->d_healthCheckMetrics.d_networkErrors << " " << now << "\r\n";	24✔
115	str << base << "healthcheckfailuresmismatch" << ' ' << state->d_healthCheckMetrics.d_mismatchErrors << " " << now << "\r\n";	24✔
116	str << base << "healthcheckfailuresinvalid" << ' ' << state->d_healthCheckMetrics.d_invalidResponseErrors << " " << now << "\r\n";	24✔
117	}	24✔
118
119	std::map<std::string, uint64_t> frontendDuplicates;	8✔
120	for (const auto& front : dnsdist::getFrontends()) {	16✔
121	if (front->udpFD == -1 && front->tcpFD == -1) {	16!
122	continue;	×
123	}	×
124
125	string frontName = front->local.toStringWithPort() + (front->udpFD >= 0 ? "_udp" : "_tcp");	16✔
126	std::replace(frontName.begin(), frontName.end(), '.', '_');	16✔
127	auto dupPair = frontendDuplicates.insert({frontName, 1});	16✔
128	if (!dupPair.second) {	16!
129	frontName += "_" + std::to_string(dupPair.first->second);	×
130	++(dupPair.first->second);	×
131	}	×
132
133	string base = namespace_name;	16✔
134	base += ".";	16✔
135	base += hostname;	16✔
136	base += ".";	16✔
137	base += instance_name;	16✔
138	base += ".frontends.";	16✔
139	base += frontName;	16✔
140	base += ".";	16✔
141	str << base << "queries" << ' ' << front->queries.load() << " " << now << "\r\n";	16✔
142	str << base << "responses" << ' ' << front->responses.load() << " " << now << "\r\n";	16✔
143	str << base << "tcpdiedreadingquery" << ' ' << front->tcpDiedReadingQuery.load() << " " << now << "\r\n";	16✔
144	str << base << "tcpdiedsendingresponse" << ' ' << front->tcpDiedSendingResponse.load() << " " << now << "\r\n";	16✔
145	str << base << "tcpgaveup" << ' ' << front->tcpGaveUp.load() << " " << now << "\r\n";	16✔
146	str << base << "tcpclienttimeouts" << ' ' << front->tcpClientTimeouts.load() << " " << now << "\r\n";	16✔
147	str << base << "tcpdownstreamtimeouts" << ' ' << front->tcpDownstreamTimeouts.load() << " " << now << "\r\n";	16✔
148	str << base << "tcpcurrentconnections" << ' ' << front->tcpCurrentConnections.load() << " " << now << "\r\n";	16✔
149	str << base << "tcpmaxconcurrentconnections" << ' ' << front->tcpMaxConcurrentConnections.load() << " " << now << "\r\n";	16✔
150	str << base << "tcpavgqueriesperconnection" << ' ' << front->tcpAvgQueriesPerConnection.load() << " " << now << "\r\n";	16✔
151	str << base << "tcpavgconnectionduration" << ' ' << front->tcpAvgConnectionDuration.load() << " " << now << "\r\n";	16✔
152	str << base << "tcpavgreadios" << ' ' << front->tcpAvgIOsPerConnection.load() << " " << now << "\r\n";	16✔
153	str << base << "tls10-queries" << ' ' << front->tls10queries.load() << " " << now << "\r\n";	16✔
154	str << base << "tls11-queries" << ' ' << front->tls11queries.load() << " " << now << "\r\n";	16✔
155	str << base << "tls12-queries" << ' ' << front->tls12queries.load() << " " << now << "\r\n";	16✔
156	str << base << "tls13-queries" << ' ' << front->tls13queries.load() << " " << now << "\r\n";	16✔
157	str << base << "tls-unknown-queries" << ' ' << front->tlsUnknownqueries.load() << " " << now << "\r\n";	16✔
158	str << base << "tlsnewsessions" << ' ' << front->tlsNewSessions.load() << " " << now << "\r\n";	16✔
159	str << base << "tlsresumptions" << ' ' << front->tlsResumptions.load() << " " << now << "\r\n";	16✔
160	str << base << "tlsunknownticketkeys" << ' ' << front->tlsUnknownTicketKey.load() << " " << now << "\r\n";	16✔
161	str << base << "tlsinactiveticketkeys" << ' ' << front->tlsInactiveTicketKey.load() << " " << now << "\r\n";	16✔
162
163	const TLSErrorCounters* errorCounters = nullptr;	16✔
164	if (front->tlsFrontend != nullptr) {	16!
165	errorCounters = &front->tlsFrontend->d_tlsCounters;	×
166	}	×
167	else if (front->dohFrontend != nullptr) {	16!
168	errorCounters = &front->dohFrontend->d_tlsContext->d_tlsCounters;	×
169	}	×
170	if (errorCounters != nullptr) {	16!
171	str << base << "tlsdhkeytoosmall" << ' ' << errorCounters->d_dhKeyTooSmall << " " << now << "\r\n";	×
172	str << base << "tlsinappropriatefallback" << ' ' << errorCounters->d_inappropriateFallBack << " " << now << "\r\n";	×
173	str << base << "tlsnosharedcipher" << ' ' << errorCounters->d_noSharedCipher << " " << now << "\r\n";	×
174	str << base << "tlsunknownciphertype" << ' ' << errorCounters->d_unknownCipherType << " " << now << "\r\n";	×
175	str << base << "tlsunknownkeyexchangetype" << ' ' << errorCounters->d_unknownKeyExchangeType << " " << now << "\r\n";	×
176	str << base << "tlsunknownprotocol" << ' ' << errorCounters->d_unknownProtocol << " " << now << "\r\n";	×
177	str << base << "tlsunsupportedec" << ' ' << errorCounters->d_unsupportedEC << " " << now << "\r\n";	×
178	str << base << "tlsunsupportedprotocol" << ' ' << errorCounters->d_unsupportedProtocol << " " << now << "\r\n";	×
179	}	×
180	}	16✔
181
182	for (const auto& entry : dnsdist::configuration::getCurrentRuntimeConfiguration().d_pools) {	8✔
183	string poolName = entry.first;	8✔
184	std::replace(poolName.begin(), poolName.end(), '.', '_');	8✔
185	if (poolName.empty()) {	8!
186	poolName = "_default_";	8✔
187	}	8✔
188	string base = namespace_name;	8✔
189	base += ".";	8✔
190	base += hostname;	8✔
191	base += ".";	8✔
192	base += instance_name;	8✔
193	base += ".pools.";	8✔
194	base += poolName;	8✔
195	base += ".";	8✔
196	const std::shared_ptr<ServerPool> pool = entry.second;	8✔
197	str << base << "servers"	8✔
198	<< " " << pool->countServers(false) << " " << now << "\r\n";	8✔
199	str << base << "servers-up"	8✔
200	<< " " << pool->countServers(true) << " " << now << "\r\n";	8✔
201	if (pool->packetCache != nullptr) {	8!
202	const auto& cache = pool->packetCache;	×
203	str << base << "cache-size"	×
204	<< " " << cache->getMaxEntries() << " " << now << "\r\n";	×
205	str << base << "cache-entries"	×
206	<< " " << cache->getEntriesCount() << " " << now << "\r\n";	×
207	str << base << "cache-hits"	×
208	<< " " << cache->getHits() << " " << now << "\r\n";	×
209	str << base << "cache-misses"	×
210	<< " " << cache->getMisses() << " " << now << "\r\n";	×
211	str << base << "cache-deferred-inserts"	×
212	<< " " << cache->getDeferredInserts() << " " << now << "\r\n";	×
213	str << base << "cache-deferred-lookups"	×
214	<< " " << cache->getDeferredLookups() << " " << now << "\r\n";	×
215	str << base << "cache-lookup-collisions"	×
216	<< " " << cache->getLookupCollisions() << " " << now << "\r\n";	×
217	str << base << "cache-insert-collisions"	×
218	<< " " << cache->getInsertCollisions() << " " << now << "\r\n";	×
219	str << base << "cache-ttl-too-shorts"	×
220	<< " " << cache->getTTLTooShorts() << " " << now << "\r\n";	×
221	str << base << "cache-cleanup-count"	×
222	<< " " << cache->getCleanupCount() << " " << now << "\r\n";	×
223	}	×
224	}	8✔
225
226	#ifdef HAVE_DNS_OVER_HTTPS	8✔
227	{	8✔
228	std::map<std::string, uint64_t> dohFrontendDuplicates;	8✔
229	const string base = "dnsdist." + hostname + ".main.doh.";	8✔
230	for (const auto& doh : dnsdist::getDoHFrontends()) {	8!
231	string name = doh->d_tlsContext->d_addr.toStringWithPort();	×
232	std::replace(name.begin(), name.end(), '.', '_');	×
233	std::replace(name.begin(), name.end(), ':', '_');	×
234	std::replace(name.begin(), name.end(), '[', '_');	×
235	std::replace(name.begin(), name.end(), ']', '_');	×
236
237	auto dupPair = dohFrontendDuplicates.insert({name, 1});	×
238	if (!dupPair.second) {	×
239	name += "_" + std::to_string(dupPair.first->second);	×
240	++(dupPair.first->second);	×
241	}	×
242
243	const vector<pair<const char*, const pdns::stat_t&>> values{	×
244	{"http-connects", doh->d_httpconnects},	×
245	{"http1-queries", doh->d_http1Stats.d_nbQueries},	×
246	{"http2-queries", doh->d_http2Stats.d_nbQueries},	×
247	{"http1-200-responses", doh->d_http1Stats.d_nb200Responses},	×
248	{"http2-200-responses", doh->d_http2Stats.d_nb200Responses},	×
249	{"http1-400-responses", doh->d_http1Stats.d_nb400Responses},	×
250	{"http2-400-responses", doh->d_http2Stats.d_nb400Responses},	×
251	{"http1-403-responses", doh->d_http1Stats.d_nb403Responses},	×
252	{"http2-403-responses", doh->d_http2Stats.d_nb403Responses},	×
253	{"http1-500-responses", doh->d_http1Stats.d_nb500Responses},	×
254	{"http2-500-responses", doh->d_http2Stats.d_nb500Responses},	×
255	{"http1-502-responses", doh->d_http1Stats.d_nb502Responses},	×
256	{"http2-502-responses", doh->d_http2Stats.d_nb502Responses},	×
257	{"http1-other-responses", doh->d_http1Stats.d_nbOtherResponses},	×
258	{"http2-other-responses", doh->d_http2Stats.d_nbOtherResponses},	×
259	{"get-queries", doh->d_getqueries},	×
260	{"post-queries", doh->d_postqueries},	×
261	{"bad-requests", doh->d_badrequests},	×
262	{"error-responses", doh->d_errorresponses},	×
263	{"redirect-responses", doh->d_redirectresponses},	×
264	{"valid-responses", doh->d_validresponses}};	×
265
266	for (const auto& item : values) {	×
267	str << base << name << "." << item.first << " " << item.second << " " << now << "\r\n";	×
268	}	×
269	}	×
270	}	8✔
271	#endif /* HAVE_DNS_OVER_HTTPS */	8✔
272
273	{	8✔
274	std::string qname;	8✔
275	auto records = dnsdist::QueryCount::g_queryCountRecords.write_lock();	8✔
276	for (const auto& record : *records) {	8!
277	qname = record.first;	×
278	std::replace(qname.begin(), qname.end(), '.', '_');	×
279	str << "dnsdist.querycount." << qname << ".queries " << record.second << " " << now << "\r\n";	×
280	}	×
281	records->clear();	8✔
282	}	8✔
283
284	const string msg = str.str();	8✔
285
286	int ret = waitForRWData(carbonSock.getHandle(), false, 1, 0);	8✔
287	if (ret <= 0) {	8!
288	vinfolog("Unable to write data to carbon server on %s: %s", server.toStringWithPort(), (ret < 0 ? stringerror() : "Timeout"));	×
289	return false;	×
290	}	×
291	carbonSock.setBlocking();	8✔
292	writen2(carbonSock.getHandle(), msg.c_str(), msg.size());	8✔
293	}	8✔
294	catch (const std::exception& e) {	8✔
295	warnlog("Problem sending carbon data to %s: %s", server.toStringWithPort(), e.what());	×
296	return false;	×
297	}	×
298
299	return true;	8✔
300	}	8✔
301
302	static void carbonHandler(const Carbon::Endpoint& endpoint)
303	{	2✔
304	setThreadName("dnsdist/carbon");	2✔
305	const auto intervalUSec = endpoint.interval * 1000 * 1000;	2✔
306	/* maximum interval between two attempts is 10 minutes */
307	const ExponentialBackOffTimer backOffTimer(10 * 60);	2✔
308
309	try {	2✔
310	uint8_t consecutiveFailures = 0;	2✔
311	do {	8✔
312	dnsdist::configuration::refreshLocalRuntimeConfiguration();	8✔
313
314	DTime dtimer;	8✔
315	dtimer.set();	8✔
316	if (doOneCarbonExport(endpoint)) {	8!
317	const auto elapsedUSec = dtimer.udiff();	8✔
318	if (elapsedUSec < 0 \|\| static_cast<unsigned int>(elapsedUSec) <= intervalUSec) {	8!
319	useconds_t toSleepUSec = intervalUSec - elapsedUSec;	8✔
320	usleep(toSleepUSec);	8✔
321	}	8✔
UNCOV 322	else {	×
UNCOV 323	vinfolog("Carbon export for %s took longer (%s us) than the configured interval (%d us)", endpoint.server.toStringWithPort(), elapsedUSec, intervalUSec);	×
UNCOV 324	}	×
325	consecutiveFailures = 0;	8✔
326	}	8✔
UNCOV 327	else {	×
UNCOV 328	const auto backOff = backOffTimer.get(consecutiveFailures);	×
UNCOV 329	if (consecutiveFailures < std::numeric_limits<decltype(consecutiveFailures)>::max()) {	×
330	consecutiveFailures++;	×
331	}	×
UNCOV 332	vinfolog("Run for %s - %s failed, next attempt in %d", endpoint.server.toStringWithPort(), endpoint.ourname, backOff);	×
UNCOV 333	std::this_thread::sleep_for(std::chrono::seconds(backOff));	×
UNCOV 334	}	×
335	} while (true);	8✔
336	}	2✔
337	catch (const PDNSException& e) {	2✔
338	errlog("Carbon thread for %s died, PDNSException: %s", endpoint.server.toStringWithPort(), e.reason);	×
339	}	×
340	catch (...) {	2✔
341	errlog("Carbon thread for %s died", endpoint.server.toStringWithPort());	×
342	}	×
343	}	2✔
344
345	Carbon::Endpoint Carbon::newEndpoint(const std::string& address, std::string ourName, uint64_t interval, const std::string& namespace_name, const std::string& instance_name)
346	{	4✔
347	if (ourName.empty()) {	4!
348	try {	×
349	ourName = getCarbonHostName();	×
350	}	×
351	catch (const std::exception& exp) {	×
352	throw std::runtime_error(std::string("The 'ourname' setting in 'carbonServer()' has not been set and we are unable to determine the system's hostname: ") + exp.what());	×
353	}	×
354	}	×
355	return Carbon::Endpoint{ComboAddress(address, 2003),	4✔
356	!namespace_name.empty() ? namespace_name : "dnsdist",	4!
357	std::move(ourName),	4✔
358	!instance_name.empty() ? instance_name : "main",	4!
359	interval < std::numeric_limits<unsigned int>::max() ? static_cast<unsigned int>(interval) : 30};	4!
360	}	4✔
361
362	void Carbon::run(const std::vector<Carbon::Endpoint>& endpoints)
363	{	377✔
364	for (const auto& endpoint : endpoints) {	377✔
365	std::thread newHandler(carbonHandler, endpoint);	2✔
366	newHandler.detach();	2✔
367	}	2✔
368	}	377✔
369
370	}
371	#endif /* DISABLE_CARBON */
372
373	static const time_t s_start = time(nullptr);
374
375	uint64_t uptimeOfProcess(const std::string& str)
376	{	254✔
377	(void)str;	254✔
378	return time(nullptr) - s_start;	254✔
379	}	254✔

PowerDNS / pdns / 17765900968

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