8981261148

Committed 07 May 2024 07:18AM UTC coverage: 59.456% (+0.006%) from 59.45%

Build # 8981261148

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Commit Message

Merge pull request #14130 from rgacogne/ddist-fix-updateio-h2

dnsdist: Fix TCP I/O timeout and callback being used for HTTP/2

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61.56

/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.hh"
#include "dnsdist-backoff.hh"
#include "dnsdist-metrics.hh"

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

namespace dnsdist
{

LockGuarded<Carbon::Config> Carbon::s_config;

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) {
        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_t_trait<double>*>(&entry.d_value)) {
          str << (*adval)->load();
        }
        else if (const auto& dval = std::get_if<double*>(&entry.d_value)) {
          str << **dval;
        }
        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";
      }
    }

    auto states = g_dstates.getLocal();
    for (const auto& state : *states) {
      string serverName = state->getName().empty() ? state->d_config.remote.toStringWithPort() : state->getName();
      boost::replace_all(serverName, ".", "_");
      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.availability != DownstreamState::Availability::Down ? state->latencyUsec / 1000.0 : 0) << " " << now << "\r\n";
      str << base << "latencytcp" << ' ' << (state->d_config.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 : g_frontends) {
      if (front->udpFD == -1 && front->tcpFD == -1) {
        continue;
      }

      string frontName = front->local.toStringWithPort() + (front->udpFD >= 0 ? "_udp" : "_tcp");
      boost::replace_all(frontName, ".", "_");
      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 << "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";
      }
    }

    auto localPools = g_pools.getLocal();
    for (const auto& entry : *localPools) {
      string poolName = entry.first;
      boost::replace_all(poolName, ".", "_");
      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 : g_dohlocals) {
        string name = doh->d_tlsContext.d_addr.toStringWithPort();
        boost::replace_all(name, ".", "_");
        boost::replace_all(name, ":", "_");
        boost::replace_all(name, "[", "_");
        boost::replace_all(name, "]", "_");

        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 = g_qcount.records.write_lock();
      for (const auto& record : *records) {
        qname = record.first;
        boost::replace_all(qname, ".", "_");
        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(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 {
      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());
  }
}

bool Carbon::addEndpoint(Carbon::Endpoint&& endpoint)
{
  if (endpoint.ourname.empty()) {
    try {
      endpoint.ourname = getCarbonHostName();
    }
    catch (const std::exception& e) {
      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: ") + e.what());
    }
  }

  auto config = s_config.lock();
  if (config->d_running) {
    // we already started the threads, let's just spawn a new one
    std::thread newHandler(carbonHandler, std::move(endpoint));
    newHandler.detach();
  }
  else {
    config->d_endpoints.push_back(std::move(endpoint));
  }
  return true;
}

void Carbon::run()
{
  auto config = s_config.lock();
  if (config->d_running) {
    throw std::runtime_error("The carbon threads are already running");
  }
  for (auto& endpoint : config->d_endpoints) {
    std::thread newHandler(carbonHandler, std::move(endpoint));
    newHandler.detach();
  }
  config->d_endpoints.clear();
  config->d_running = true;
}

}
#endif /* DISABLE_CARBON */

static time_t s_start = time(nullptr);

uint64_t uptimeOfProcess(const std::string& 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.hh"
28	#include "dnsdist-backoff.hh"
29	#include "dnsdist-metrics.hh"
30
31	#ifndef DISABLE_CARBON
32	#include "dolog.hh"
33	#include "sstuff.hh"
34	#include "threadname.hh"
35
36	namespace dnsdist
37	{
38
39	LockGuarded<Carbon::Config> Carbon::s_config;
40
41	static bool doOneCarbonExport(const Carbon::Endpoint& endpoint)
42	{	6✔
43	const auto& server = endpoint.server;	6✔
44	const std::string& namespace_name = endpoint.namespace_name;	6✔
45	const std::string& hostname = endpoint.ourname;	6✔
46	const std::string& instance_name = endpoint.instance_name;	6✔
47
48	try {	6✔
49	Socket carbonSock(server.sin4.sin_family, SOCK_STREAM);	6✔
50	carbonSock.setNonBlocking();	6✔
51	carbonSock.connect(server); // we do the connect so the attempt happens while we gather stats	6✔
52	ostringstream str;	6✔
53
54	const time_t now = time(nullptr);	6✔
55
56	{	6✔
57	auto entries = dnsdist::metrics::g_stats.entries.read_lock();	6✔
58	for (const auto& entry : *entries) {	516✔
59	str << namespace_name << "." << hostname << "." << instance_name << "." << entry.d_name << ' ';	516✔
60	if (const auto& val = std::get_if<pdns::stat_t*>(&entry.d_value)) {	516✔
61	str << (*val)->load();	252✔
62	}	252✔
63	else if (const auto& adval = std::get_if<pdns::stat_t_trait<double>*>(&entry.d_value)) {	264!
64	str << (*adval)->load();	×
65	}	×
66	else if (const auto& dval = std::get_if<double*>(&entry.d_value)) {	264✔
67	str << **dval;	144✔
68	}	144✔
69	else if (const auto& func = std::get_if<dnsdist::metrics::Stats::statfunction_t>(&entry.d_value)) {	120!
70	str << (*func)(entry.d_name);	120✔
71	}	120✔
72	str << ' ' << now << "\r\n";	516✔
73	}	516✔
74	}	6✔
75
76	auto states = g_dstates.getLocal();	6✔
77	for (const auto& state : *states) {	18✔
78	string serverName = state->getName().empty() ? state->d_config.remote.toStringWithPort() : state->getName();	18!
79	boost::replace_all(serverName, ".", "_");	18✔
80	string base = namespace_name;	18✔
81	base += ".";	18✔
82	base += hostname;	18✔
83	base += ".";	18✔
84	base += instance_name;	18✔
85	base += ".servers.";	18✔
86	base += serverName;	18✔
87	base += ".";	18✔
88	str << base << "queries" << ' ' << state->queries.load() << " " << now << "\r\n";	18✔
89	str << base << "responses" << ' ' << state->responses.load() << " " << now << "\r\n";	18✔
90	str << base << "drops" << ' ' << state->reuseds.load() << " " << now << "\r\n";	18✔
91	str << base << "latency" << ' ' << (state->d_config.availability != DownstreamState::Availability::Down ? state->latencyUsec / 1000.0 : 0) << " " << now << "\r\n";	18✔
92	str << base << "latencytcp" << ' ' << (state->d_config.availability != DownstreamState::Availability::Down ? state->latencyUsecTCP / 1000.0 : 0) << " " << now << "\r\n";	18✔
93	str << base << "senderrors" << ' ' << state->sendErrors.load() << " " << now << "\r\n";	18✔
94	str << base << "outstanding" << ' ' << state->outstanding.load() << " " << now << "\r\n";	18✔
95	str << base << "tcpdiedsendingquery" << ' ' << state->tcpDiedSendingQuery.load() << " " << now << "\r\n";	18✔
96	str << base << "tcpdiedreaddingresponse" << ' ' << state->tcpDiedReadingResponse.load() << " " << now << "\r\n";	18✔
97	str << base << "tcpgaveup" << ' ' << state->tcpGaveUp.load() << " " << now << "\r\n";	18✔
98	str << base << "tcpreadimeouts" << ' ' << state->tcpReadTimeouts.load() << " " << now << "\r\n";	18✔
99	str << base << "tcpwritetimeouts" << ' ' << state->tcpWriteTimeouts.load() << " " << now << "\r\n";	18✔
100	str << base << "tcpconnecttimeouts" << ' ' << state->tcpConnectTimeouts.load() << " " << now << "\r\n";	18✔
101	str << base << "tcpcurrentconnections" << ' ' << state->tcpCurrentConnections.load() << " " << now << "\r\n";	18✔
102	str << base << "tcpmaxconcurrentconnections" << ' ' << state->tcpMaxConcurrentConnections.load() << " " << now << "\r\n";	18✔
103	str << base << "tcpnewconnections" << ' ' << state->tcpNewConnections.load() << " " << now << "\r\n";	18✔
104	str << base << "tcpreusedconnections" << ' ' << state->tcpReusedConnections.load() << " " << now << "\r\n";	18✔
105	str << base << "tlsresumptions" << ' ' << state->tlsResumptions.load() << " " << now << "\r\n";	18✔
106	str << base << "tcpavgqueriesperconnection" << ' ' << state->tcpAvgQueriesPerConnection.load() << " " << now << "\r\n";	18✔
107	str << base << "tcpavgconnectionduration" << ' ' << state->tcpAvgConnectionDuration.load() << " " << now << "\r\n";	18✔
108	str << base << "tcptoomanyconcurrentconnections" << ' ' << state->tcpTooManyConcurrentConnections.load() << " " << now << "\r\n";	18✔
109	str << base << "healthcheckfailures" << ' ' << state->d_healthCheckMetrics.d_failures << " " << now << "\r\n";	18✔
110	str << base << "healthcheckfailuresparsing" << ' ' << state->d_healthCheckMetrics.d_parseErrors << " " << now << "\r\n";	18✔
111	str << base << "healthcheckfailurestimeout" << ' ' << state->d_healthCheckMetrics.d_timeOuts << " " << now << "\r\n";	18✔
112	str << base << "healthcheckfailuresnetwork" << ' ' << state->d_healthCheckMetrics.d_networkErrors << " " << now << "\r\n";	18✔
113	str << base << "healthcheckfailuresmismatch" << ' ' << state->d_healthCheckMetrics.d_mismatchErrors << " " << now << "\r\n";	18✔
114	str << base << "healthcheckfailuresinvalid" << ' ' << state->d_healthCheckMetrics.d_invalidResponseErrors << " " << now << "\r\n";	18✔
115	}	18✔
116
117	std::map<std::string, uint64_t> frontendDuplicates;	6✔
118	for (const auto& front : g_frontends) {	12✔
119	if (front->udpFD == -1 && front->tcpFD == -1) {	12!
120	continue;	×
121	}	×
122
123	string frontName = front->local.toStringWithPort() + (front->udpFD >= 0 ? "_udp" : "_tcp");	12✔
124	boost::replace_all(frontName, ".", "_");	12✔
125	auto dupPair = frontendDuplicates.insert({frontName, 1});	12✔
126	if (!dupPair.second) {	12!
127	frontName += "_" + std::to_string(dupPair.first->second);	×
128	++(dupPair.first->second);	×
129	}	×
130
131	string base = namespace_name;	12✔
132	base += ".";	12✔
133	base += hostname;	12✔
134	base += ".";	12✔
135	base += instance_name;	12✔
136	base += ".frontends.";	12✔
137	base += frontName;	12✔
138	base += ".";	12✔
139	str << base << "queries" << ' ' << front->queries.load() << " " << now << "\r\n";	12✔
140	str << base << "responses" << ' ' << front->responses.load() << " " << now << "\r\n";	12✔
141	str << base << "tcpdiedreadingquery" << ' ' << front->tcpDiedReadingQuery.load() << " " << now << "\r\n";	12✔
142	str << base << "tcpdiedsendingresponse" << ' ' << front->tcpDiedSendingResponse.load() << " " << now << "\r\n";	12✔
143	str << base << "tcpgaveup" << ' ' << front->tcpGaveUp.load() << " " << now << "\r\n";	12✔
144	str << base << "tcpclienttimeouts" << ' ' << front->tcpClientTimeouts.load() << " " << now << "\r\n";	12✔
145	str << base << "tcpdownstreamtimeouts" << ' ' << front->tcpDownstreamTimeouts.load() << " " << now << "\r\n";	12✔
146	str << base << "tcpcurrentconnections" << ' ' << front->tcpCurrentConnections.load() << " " << now << "\r\n";	12✔
147	str << base << "tcpmaxconcurrentconnections" << ' ' << front->tcpMaxConcurrentConnections.load() << " " << now << "\r\n";	12✔
148	str << base << "tcpavgqueriesperconnection" << ' ' << front->tcpAvgQueriesPerConnection.load() << " " << now << "\r\n";	12✔
149	str << base << "tcpavgconnectionduration" << ' ' << front->tcpAvgConnectionDuration.load() << " " << now << "\r\n";	12✔
150	str << base << "tls10-queries" << ' ' << front->tls10queries.load() << " " << now << "\r\n";	12✔
151	str << base << "tls11-queries" << ' ' << front->tls11queries.load() << " " << now << "\r\n";	12✔
152	str << base << "tls12-queries" << ' ' << front->tls12queries.load() << " " << now << "\r\n";	12✔
153	str << base << "tls13-queries" << ' ' << front->tls13queries.load() << " " << now << "\r\n";	12✔
154	str << base << "tls-unknown-queries" << ' ' << front->tlsUnknownqueries.load() << " " << now << "\r\n";	12✔
155	str << base << "tlsnewsessions" << ' ' << front->tlsNewSessions.load() << " " << now << "\r\n";	12✔
156	str << base << "tlsresumptions" << ' ' << front->tlsResumptions.load() << " " << now << "\r\n";	12✔
157	str << base << "tlsunknownticketkeys" << ' ' << front->tlsUnknownTicketKey.load() << " " << now << "\r\n";	12✔
158	str << base << "tlsinactiveticketkeys" << ' ' << front->tlsInactiveTicketKey.load() << " " << now << "\r\n";	12✔
159
160	const TLSErrorCounters* errorCounters = nullptr;	12✔
161	if (front->tlsFrontend != nullptr) {	12!
162	errorCounters = &front->tlsFrontend->d_tlsCounters;	×
163	}	×
164	else if (front->dohFrontend != nullptr) {	12!
165	errorCounters = &front->dohFrontend->d_tlsContext.d_tlsCounters;	×
166	}	×
167	if (errorCounters != nullptr) {	12!
168	str << base << "tlsdhkeytoosmall" << ' ' << errorCounters->d_dhKeyTooSmall << " " << now << "\r\n";	×
169	str << base << "tlsinappropriatefallback" << ' ' << errorCounters->d_inappropriateFallBack << " " << now << "\r\n";	×
170	str << base << "tlsnosharedcipher" << ' ' << errorCounters->d_noSharedCipher << " " << now << "\r\n";	×
171	str << base << "tlsunknownciphertype" << ' ' << errorCounters->d_unknownCipherType << " " << now << "\r\n";	×
172	str << base << "tlsunknownkeyexchangetype" << ' ' << errorCounters->d_unknownKeyExchangeType << " " << now << "\r\n";	×
173	str << base << "tlsunknownprotocol" << ' ' << errorCounters->d_unknownProtocol << " " << now << "\r\n";	×
174	str << base << "tlsunsupportedec" << ' ' << errorCounters->d_unsupportedEC << " " << now << "\r\n";	×
175	str << base << "tlsunsupportedprotocol" << ' ' << errorCounters->d_unsupportedProtocol << " " << now << "\r\n";	×
176	}	×
177	}	12✔
178
179	auto localPools = g_pools.getLocal();	6✔
180	for (const auto& entry : *localPools) {	6✔
181	string poolName = entry.first;	6✔
182	boost::replace_all(poolName, ".", "_");	6✔
183	if (poolName.empty()) {	6!
184	poolName = "_default_";	6✔
185	}	6✔
186	string base = namespace_name;	6✔
187	base += ".";	6✔
188	base += hostname;	6✔
189	base += ".";	6✔
190	base += instance_name;	6✔
191	base += ".pools.";	6✔
192	base += poolName;	6✔
193	base += ".";	6✔
194	const std::shared_ptr<ServerPool> pool = entry.second;	6✔
195	str << base << "servers"	6✔
196	<< " " << pool->countServers(false) << " " << now << "\r\n";	6✔
197	str << base << "servers-up"	6✔
198	<< " " << pool->countServers(true) << " " << now << "\r\n";	6✔
199	if (pool->packetCache != nullptr) {	6!
200	const auto& cache = pool->packetCache;	×
201	str << base << "cache-size"	×
202	<< " " << cache->getMaxEntries() << " " << now << "\r\n";	×
203	str << base << "cache-entries"	×
204	<< " " << cache->getEntriesCount() << " " << now << "\r\n";	×
205	str << base << "cache-hits"	×
206	<< " " << cache->getHits() << " " << now << "\r\n";	×
207	str << base << "cache-misses"	×
208	<< " " << cache->getMisses() << " " << now << "\r\n";	×
209	str << base << "cache-deferred-inserts"	×
210	<< " " << cache->getDeferredInserts() << " " << now << "\r\n";	×
211	str << base << "cache-deferred-lookups"	×
212	<< " " << cache->getDeferredLookups() << " " << now << "\r\n";	×
213	str << base << "cache-lookup-collisions"	×
214	<< " " << cache->getLookupCollisions() << " " << now << "\r\n";	×
215	str << base << "cache-insert-collisions"	×
216	<< " " << cache->getInsertCollisions() << " " << now << "\r\n";	×
217	str << base << "cache-ttl-too-shorts"	×
218	<< " " << cache->getTTLTooShorts() << " " << now << "\r\n";	×
219	str << base << "cache-cleanup-count"	×
220	<< " " << cache->getCleanupCount() << " " << now << "\r\n";	×
221	}	×
222	}	6✔
223
224	#ifdef HAVE_DNS_OVER_HTTPS	6✔
225	{	6✔
226	std::map<std::string, uint64_t> dohFrontendDuplicates;	6✔
227	const string base = "dnsdist." + hostname + ".main.doh.";	6✔
228	for (const auto& doh : g_dohlocals) {	6!
229	string name = doh->d_tlsContext.d_addr.toStringWithPort();	×
230	boost::replace_all(name, ".", "_");	×
231	boost::replace_all(name, ":", "_");	×
232	boost::replace_all(name, "[", "_");	×
233	boost::replace_all(name, "]", "_");	×
234
235	auto dupPair = dohFrontendDuplicates.insert({name, 1});	×
236	if (!dupPair.second) {	×
237	name += "_" + std::to_string(dupPair.first->second);	×
238	++(dupPair.first->second);	×
239	}	×
240
241	const vector<pair<const char*, const pdns::stat_t&>> values{	×
242	{"http-connects", doh->d_httpconnects},	×
243	{"http1-queries", doh->d_http1Stats.d_nbQueries},	×
244	{"http2-queries", doh->d_http2Stats.d_nbQueries},	×
245	{"http1-200-responses", doh->d_http1Stats.d_nb200Responses},	×
246	{"http2-200-responses", doh->d_http2Stats.d_nb200Responses},	×
247	{"http1-400-responses", doh->d_http1Stats.d_nb400Responses},	×
248	{"http2-400-responses", doh->d_http2Stats.d_nb400Responses},	×
249	{"http1-403-responses", doh->d_http1Stats.d_nb403Responses},	×
250	{"http2-403-responses", doh->d_http2Stats.d_nb403Responses},	×
251	{"http1-500-responses", doh->d_http1Stats.d_nb500Responses},	×
252	{"http2-500-responses", doh->d_http2Stats.d_nb500Responses},	×
253	{"http1-502-responses", doh->d_http1Stats.d_nb502Responses},	×
254	{"http2-502-responses", doh->d_http2Stats.d_nb502Responses},	×
255	{"http1-other-responses", doh->d_http1Stats.d_nbOtherResponses},	×
256	{"http2-other-responses", doh->d_http2Stats.d_nbOtherResponses},	×
257	{"get-queries", doh->d_getqueries},	×
258	{"post-queries", doh->d_postqueries},	×
259	{"bad-requests", doh->d_badrequests},	×
260	{"error-responses", doh->d_errorresponses},	×
261	{"redirect-responses", doh->d_redirectresponses},	×
262	{"valid-responses", doh->d_validresponses}};	×
263
264	for (const auto& item : values) {	×
265	str << base << name << "." << item.first << " " << item.second << " " << now << "\r\n";	×
266	}	×
267	}	×
268	}	6✔
269	#endif /* HAVE_DNS_OVER_HTTPS */	6✔
270
271	{	6✔
272	std::string qname;	6✔
273	auto records = g_qcount.records.write_lock();	6✔
274	for (const auto& record : *records) {	6!
275	qname = record.first;	×
276	boost::replace_all(qname, ".", "_");	×
277	str << "dnsdist.querycount." << qname << ".queries " << record.second << " " << now << "\r\n";	×
278	}	×
279	records->clear();	6✔
280	}	6✔
281
282	const string msg = str.str();	6✔
283
284	int ret = waitForRWData(carbonSock.getHandle(), false, 1, 0);	6✔
285	if (ret <= 0) {	6!
286	vinfolog("Unable to write data to carbon server on %s: %s", server.toStringWithPort(), (ret < 0 ? stringerror() : "Timeout"));	×
287	return false;	×
288	}	×
289	carbonSock.setBlocking();	6✔
290	writen2(carbonSock.getHandle(), msg.c_str(), msg.size());	6✔
291	}	6✔
292	catch (const std::exception& e) {	6✔
293	warnlog("Problem sending carbon data to %s: %s", server.toStringWithPort(), e.what());	×
294	return false;	×
295	}	×
296
297	return true;	6✔
298	}	6✔
299
300	static void carbonHandler(Carbon::Endpoint&& endpoint)
301	{	2✔
302	setThreadName("dnsdist/carbon");	2✔
303	const auto intervalUSec = endpoint.interval * 1000 * 1000;	2✔
304	/* maximum interval between two attempts is 10 minutes */
305	const ExponentialBackOffTimer backOffTimer(10 * 60);	2✔
306
307	try {	2✔
308	uint8_t consecutiveFailures = 0;	2✔
309	do {	6✔
310	DTime dtimer;	6✔
311	dtimer.set();	6✔
312	if (doOneCarbonExport(endpoint)) {	6!
313	const auto elapsedUSec = dtimer.udiff();	6✔
314	if (elapsedUSec < 0 \|\| static_cast<unsigned int>(elapsedUSec) <= intervalUSec) {	6!
315	useconds_t toSleepUSec = intervalUSec - elapsedUSec;	6✔
316	usleep(toSleepUSec);	6✔
317	}	6✔
318	else {	×
319	vinfolog("Carbon export for %s took longer (%s us) than the configured interval (%d us)", endpoint.server.toStringWithPort(), elapsedUSec, intervalUSec);	×
320	}	×
321	consecutiveFailures = 0;	6✔
322	}	6✔
UNCOV 323	else {	×
UNCOV 324	const auto backOff = backOffTimer.get(consecutiveFailures);	×
UNCOV 325	if (consecutiveFailures < std::numeric_limits<decltype(consecutiveFailures)>::max()) {	×
326	consecutiveFailures++;	×
327	}	×
UNCOV 328	vinfolog("Run for %s - %s failed, next attempt in %d", endpoint.server.toStringWithPort(), endpoint.ourname, backOff);	×
UNCOV 329	std::this_thread::sleep_for(std::chrono::seconds(backOff));	×
UNCOV 330	}	×
331	} while (true);	6✔
332	}	2✔
333	catch (const PDNSException& e) {	2✔
334	errlog("Carbon thread for %s died, PDNSException: %s", endpoint.server.toStringWithPort(), e.reason);	×
335	}	×
336	catch (...) {	2✔
337	errlog("Carbon thread for %s died", endpoint.server.toStringWithPort());	×
338	}	×
339	}	2✔
340
341	bool Carbon::addEndpoint(Carbon::Endpoint&& endpoint)
342	{	4✔
343	if (endpoint.ourname.empty()) {	4!
344	try {	×
345	endpoint.ourname = getCarbonHostName();	×
346	}	×
347	catch (const std::exception& e) {	×
348	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: ") + e.what());	×
349	}	×
350	}	×
351
352	auto config = s_config.lock();	4✔
353	if (config->d_running) {	4!
354	// we already started the threads, let's just spawn a new one
355	std::thread newHandler(carbonHandler, std::move(endpoint));	×
356	newHandler.detach();	×
357	}	×
358	else {	4✔
359	config->d_endpoints.push_back(std::move(endpoint));	4✔
360	}	4✔
361	return true;	4✔
362	}	4✔
363
364	void Carbon::run()
365	{	308✔
366	auto config = s_config.lock();	308✔
367	if (config->d_running) {	308!
368	throw std::runtime_error("The carbon threads are already running");	×
369	}	×
370	for (auto& endpoint : config->d_endpoints) {	308✔
371	std::thread newHandler(carbonHandler, std::move(endpoint));	2✔
372	newHandler.detach();	2✔
373	}	2✔
374	config->d_endpoints.clear();	308✔
375	config->d_running = true;	308✔
376	}	308✔
377
378	}
379	#endif /* DISABLE_CARBON */
380
381	static time_t s_start = time(nullptr);
382
383	uint64_t uptimeOfProcess(const std::string& str)
384	{	215✔
385	return time(nullptr) - s_start;	215✔
386	}	215✔

PowerDNS / pdns / 8981261148

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