ceph/src/mon/LogMonitor.cc

   1 // -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
   2 // vim: ts=8 sw=2 smarttab
   3 /*
   4  * Ceph - scalable distributed file system
   5  *
   6  * Copyright (C) 2004-2006 Sage Weil <sage@newdream.net>
   7  *
   8  * This is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public
  10  * License version 2.1, as published by the Free Software
  11  * Foundation.  See file COPYING.
  12  *
  13  */
  14
  15 #include <boost/algorithm/string/predicate.hpp>
  16
  17 #include <sstream>
  18 #include <syslog.h>
  19
  20 #include "LogMonitor.h"
  21 #include "Monitor.h"
  22 #include "MonitorDBStore.h"
  23
  24 #include "messages/MMonCommand.h"
  25 #include "messages/MLog.h"
  26 #include "messages/MLogAck.h"
  27 #include "common/Graylog.h"
  28 #include "common/errno.h"
  29 #include "common/strtol.h"
  30 #include "include/assert.h"
  31 #include "include/str_list.h"
  32 #include "include/str_map.h"
  33 #include "include/compat.h"
  34
  35 #define dout_subsys ceph_subsys_mon
  36 #undef dout_prefix
  37 #define dout_prefix _prefix(_dout, mon, get_last_committed())
  38 static ostream& _prefix(std::ostream *_dout, Monitor *mon, version_t v) {
  39   return *_dout << "mon." << mon->name << "@" << mon->rank
  40                 << "(" << mon->get_state_name()
  41                 << ").log v" << v << " ";
  42 }
  43
  44 ostream& operator<<(ostream &out, const LogMonitor &pm)
  45 {
  46   return out << "log";
  47 }
  48
  49 /*
  50  Tick function to update the map based on performance every N seconds
  51 */
  52
  53 void LogMonitor::tick()
  54 {
  55   if (!is_active()) return;
  56
  57   dout(10) << *this << dendl;
  58
  59 }
  60
  61 void LogMonitor::create_initial()
  62 {
  63   dout(10) << "create_initial -- creating initial map" << dendl;
  64   LogEntry e;
  65   memset(&e.who, 0, sizeof(e.who));
  66   e.name = g_conf->name;
  67   e.stamp = ceph_clock_now();
  68   e.prio = CLOG_INFO;
  69   std::stringstream ss;
  70   ss << "mkfs " << mon->monmap->get_fsid();
  71   e.msg = ss.str();
  72   e.seq = 0;
  73   pending_log.insert(pair<utime_t,LogEntry>(e.stamp, e));
  74 }
  75
  76 void LogMonitor::update_from_paxos(bool *need_bootstrap)
  77 {
  78   dout(10) << __func__ << dendl;
  79   version_t version = get_last_committed();
  80   dout(10) << __func__ << " version " << version
  81            << " summary v " << summary.version << dendl;
  82   if (version == summary.version)
  83     return;
  84   assert(version >= summary.version);
  85
  86   map<string,bufferlist> channel_blog;
  87
  88   version_t latest_full = get_version_latest_full();
  89   dout(10) << __func__ << " latest full " << latest_full << dendl;
  90   if ((latest_full > 0) && (latest_full > summary.version)) {
  91     bufferlist latest_bl;
  92     get_version_full(latest_full, latest_bl);
  93     assert(latest_bl.length() != 0);
  94     dout(7) << __func__ << " loading summary e" << latest_full << dendl;
  95     bufferlist::iterator p = latest_bl.begin();
  96     ::decode(summary, p);
  97     dout(7) << __func__ << " loaded summary e" << summary.version << dendl;
  98   }
  99
 100   // walk through incrementals
 101   while (version > summary.version) {
 102     bufferlist bl;
 103     int err = get_version(summary.version+1, bl);
 104     assert(err == 0);
 105     assert(bl.length());
 106
 107     bufferlist::iterator p = bl.begin();
 108     __u8 v;
 109     ::decode(v, p);
 110     while (!p.end()) {
 111       LogEntry le;
 112       le.decode(p);
 113       dout(7) << "update_from_paxos applying incremental log " << summary.version+1 <<  " " << le << dendl;
 114
 115       string channel = le.channel;
 116       if (channel.empty()) // keep retrocompatibility
 117         channel = CLOG_CHANNEL_CLUSTER;
 118
 119       if (g_conf->get_val<bool>("mon_cluster_log_to_stderr")) {
 120         cerr << channel << " " << le << std::endl;
 121       }
 122
 123       if (channels.do_log_to_syslog(channel)) {
 124         string level = channels.get_level(channel);
 125         string facility = channels.get_facility(channel);
 126         if (level.empty() || facility.empty()) {
 127           derr << __func__ << " unable to log to syslog -- level or facility"
 128                << " not defined (level: " << level << ", facility: "
 129                << facility << ")" << dendl;
 130           continue;
 131         }
 132         le.log_to_syslog(channels.get_level(channel),
 133                          channels.get_facility(channel));
 134       }
 135
 136       if (channels.do_log_to_graylog(channel)) {
 137         ceph::logging::Graylog::Ref graylog = channels.get_graylog(channel);
 138         if (graylog) {
 139           graylog->log_log_entry(&le);
 140         }
 141         dout(7) << "graylog: " << channel << " " << graylog
 142                 << " host:" << channels.log_to_graylog_host << dendl;
 143       }
 144
 145       string log_file = channels.get_log_file(channel);
 146       dout(20) << __func__ << " logging for channel '" << channel
 147                << "' to file '" << log_file << "'" << dendl;
 148
 149       if (!log_file.empty()) {
 150         string log_file_level = channels.get_log_file_level(channel);
 151         if (log_file_level.empty()) {
 152           dout(1) << __func__ << " warning: log file level not defined for"
 153                   << " channel '" << channel << "' yet a log file is --"
 154                   << " will assume lowest level possible" << dendl;
 155         }
 156
 157         int min = string_to_syslog_level(log_file_level);
 158         int l = clog_type_to_syslog_level(le.prio);
 159         if (l <= min) {
 160           stringstream ss;
 161           ss << le << "\n";
 162           // init entry if DNE
 163           bufferlist &blog = channel_blog[channel];
 164           blog.append(ss.str());
 165         }
 166       }
 167
 168       summary.add(le);
 169     }
 170
 171     summary.version++;
 172     summary.prune(g_conf->mon_log_max_summary);
 173   }
 174
 175   dout(15) << __func__ << " logging for "
 176            << channel_blog.size() << " channels" << dendl;
 177   for(map<string,bufferlist>::iterator p = channel_blog.begin();
 178       p != channel_blog.end(); ++p) {
 179     if (!p->second.length()) {
 180       dout(15) << __func__ << " channel '" << p->first
 181                << "': nothing to log" << dendl;
 182       continue;
 183     }
 184
 185     dout(15) << __func__ << " channel '" << p->first
 186              << "' logging " << p->second.length() << " bytes" << dendl;
 187     string log_file = channels.get_log_file(p->first);
 188
 189     int fd = ::open(log_file.c_str(), O_WRONLY|O_APPEND|O_CREAT, 0600);
 190     if (fd < 0) {
 191       int err = -errno;
 192       dout(1) << "unable to write to '" << log_file << "' for channel '"
 193               << p->first << "': " << cpp_strerror(err) << dendl;
 194     } else {
 195       int err = p->second.write_fd(fd);
 196       if (err < 0) {
 197         dout(1) << "error writing to '" << log_file << "' for channel '"
 198                 << p->first << ": " << cpp_strerror(err) << dendl;
 199       }
 200       VOID_TEMP_FAILURE_RETRY(::close(fd));
 201     }
 202   }
 203
 204   check_subs();
 205 }
 206
 207 void LogMonitor::create_pending()
 208 {
 209   pending_log.clear();
 210   pending_summary = summary;
 211   dout(10) << "create_pending v " << (get_last_committed() + 1) << dendl;
 212 }
 213
 214 void LogMonitor::encode_pending(MonitorDBStore::TransactionRef t)
 215 {
 216   version_t version = get_last_committed() + 1;
 217   bufferlist bl;
 218   dout(10) << __func__ << " v" << version << dendl;
 219   __u8 v = 1;
 220   ::encode(v, bl);
 221   multimap<utime_t,LogEntry>::iterator p;
 222   for (p = pending_log.begin(); p != pending_log.end(); ++p)
 223     p->second.encode(bl, mon->get_quorum_con_features());
 224
 225   put_version(t, version, bl);
 226   put_last_committed(t, version);
 227 }
 228
 229 void LogMonitor::encode_full(MonitorDBStore::TransactionRef t)
 230 {
 231   dout(10) << __func__ << " log v " << summary.version << dendl;
 232   assert(get_last_committed() == summary.version);
 233
 234   bufferlist summary_bl;
 235   ::encode(summary, summary_bl, mon->get_quorum_con_features());
 236
 237   put_version_full(t, summary.version, summary_bl);
 238   put_version_latest_full(t, summary.version);
 239 }
 240
 241 version_t LogMonitor::get_trim_to()
 242 {
 243   if (!mon->is_leader())
 244     return 0;
 245
 246   unsigned max = g_conf->mon_max_log_epochs;
 247   version_t version = get_last_committed();
 248   if (version > max)
 249     return version - max;
 250   return 0;
 251 }
 252
 253 bool LogMonitor::preprocess_query(MonOpRequestRef op)
 254 {
 255   op->mark_logmon_event("preprocess_query");
 256   PaxosServiceMessage *m = static_cast<PaxosServiceMessage*>(op->get_req());
 257   dout(10) << "preprocess_query " << *m << " from " << m->get_orig_source_inst() << dendl;
 258   switch (m->get_type()) {
 259   case MSG_MON_COMMAND:
 260     return preprocess_command(op);
 261
 262   case MSG_LOG:
 263     return preprocess_log(op);
 264
 265   default:
 266     ceph_abort();
 267     return true;
 268   }
 269 }
 270
 271 bool LogMonitor::prepare_update(MonOpRequestRef op)
 272 {
 273   op->mark_logmon_event("prepare_update");
 274   PaxosServiceMessage *m = static_cast<PaxosServiceMessage*>(op->get_req());
 275   dout(10) << "prepare_update " << *m << " from " << m->get_orig_source_inst() << dendl;
 276   switch (m->get_type()) {
 277   case MSG_MON_COMMAND:
 278     return prepare_command(op);
 279   case MSG_LOG:
 280     return prepare_log(op);
 281   default:
 282     ceph_abort();
 283     return false;
 284   }
 285 }
 286
 287 bool LogMonitor::preprocess_log(MonOpRequestRef op)
 288 {
 289   op->mark_logmon_event("preprocess_log");
 290   MLog *m = static_cast<MLog*>(op->get_req());
 291   dout(10) << "preprocess_log " << *m << " from " << m->get_orig_source() << dendl;
 292   int num_new = 0;
 293
 294   MonSession *session = m->get_session();
 295   if (!session)
 296     goto done;
 297   if (!session->is_capable("log", MON_CAP_W)) {
 298     dout(0) << "preprocess_log got MLog from entity with insufficient privileges "
 299             << session->caps << dendl;
 300     goto done;
 301   }
 302
 303   for (deque<LogEntry>::iterator p = m->entries.begin();
 304        p != m->entries.end();
 305        ++p) {
 306     if (!pending_summary.contains(p->key()))
 307       num_new++;
 308   }
 309   if (!num_new) {
 310     dout(10) << "  nothing new" << dendl;
 311     goto done;
 312   }
 313
 314   return false;
 315
 316  done:
 317   return true;
 318 }
 319
 320 struct LogMonitor::C_Log : public C_MonOp {
 321   LogMonitor *logmon;
 322   C_Log(LogMonitor *p, MonOpRequestRef o) :
 323     C_MonOp(o), logmon(p) {}
 324   void _finish(int r) override {
 325     if (r == -ECANCELED) {
 326       return;
 327     }
 328     logmon->_updated_log(op);
 329   }
 330 };
 331
 332 bool LogMonitor::prepare_log(MonOpRequestRef op)
 333 {
 334   op->mark_logmon_event("prepare_log");
 335   MLog *m = static_cast<MLog*>(op->get_req());
 336   dout(10) << "prepare_log " << *m << " from " << m->get_orig_source() << dendl;
 337
 338   if (m->fsid != mon->monmap->fsid) {
 339     dout(0) << "handle_log on fsid " << m->fsid << " != " << mon->monmap->fsid
 340             << dendl;
 341     return false;
 342   }
 343
 344   for (deque<LogEntry>::iterator p = m->entries.begin();
 345        p != m->entries.end();
 346        ++p) {
 347     dout(10) << " logging " << *p << dendl;
 348     if (!pending_summary.contains(p->key())) {
 349       pending_summary.add(*p);
 350       pending_log.insert(pair<utime_t,LogEntry>(p->stamp, *p));
 351     }
 352   }
 353   pending_summary.prune(g_conf->mon_log_max_summary);
 354   wait_for_finished_proposal(op, new C_Log(this, op));
 355   return true;
 356 }
 357
 358 void LogMonitor::_updated_log(MonOpRequestRef op)
 359 {
 360   MLog *m = static_cast<MLog*>(op->get_req());
 361   dout(7) << "_updated_log for " << m->get_orig_source_inst() << dendl;
 362   mon->send_reply(op, new MLogAck(m->fsid, m->entries.rbegin()->seq));
 363 }
 364
 365 bool LogMonitor::should_propose(double& delay)
 366 {
 367   // commit now if we have a lot of pending events
 368   if (g_conf->mon_max_log_entries_per_event > 0 &&
 369       pending_log.size() >= (unsigned)g_conf->mon_max_log_entries_per_event)
 370     return true;
 371
 372   // otherwise fall back to generic policy
 373   return PaxosService::should_propose(delay);
 374 }
 375
 376
 377 bool LogMonitor::preprocess_command(MonOpRequestRef op)
 378 {
 379   op->mark_logmon_event("preprocess_command");
 380   MMonCommand *m = static_cast<MMonCommand*>(op->get_req());
 381   int r = -EINVAL;
 382   bufferlist rdata;
 383   stringstream ss;
 384
 385   map<string, cmd_vartype> cmdmap;
 386   if (!cmdmap_from_json(m->cmd, &cmdmap, ss)) {
 387     string rs = ss.str();
 388     mon->reply_command(op, -EINVAL, rs, get_last_committed());
 389     return true;
 390   }
 391   MonSession *session = m->get_session();
 392   if (!session) {
 393     mon->reply_command(op, -EACCES, "access denied", get_last_committed());
 394     return true;
 395   }
 396
 397   string prefix;
 398   cmd_getval(g_ceph_context, cmdmap, "prefix", prefix);
 399
 400   string format;
 401   cmd_getval(g_ceph_context, cmdmap, "format", format, string("plain"));
 402   boost::scoped_ptr<Formatter> f(Formatter::create(format));
 403
 404   if (prefix == "log last") {
 405     int64_t num = 20;
 406     cmd_getval(g_ceph_context, cmdmap, "num", num);
 407     if (f) {
 408       f->open_array_section("tail");
 409     }
 410
 411     std::string level_str;
 412     clog_type level;
 413     if (cmd_getval(g_ceph_context, cmdmap, "level", level_str)) {
 414       level = LogEntry::str_to_level(level_str);
 415       if (level == CLOG_UNKNOWN) {
 416         ss << "Invalid severity '" << level_str << "'";
 417         mon->reply_command(op, -EINVAL, ss.str(), get_last_committed());
 418         return true;
 419       }
 420     } else {
 421       level = CLOG_INFO;
 422     }
 423
 424     std::string channel;
 425     if (!cmd_getval(g_ceph_context, cmdmap, "channel", channel)) {
 426       channel = CLOG_CHANNEL_DEFAULT;
 427     }
 428
 429     // We'll apply this twice, once while counting out lines
 430     // and once while outputting them.
 431     auto match = [level, channel](const LogEntry &entry) {
 432       return entry.prio >= level && (entry.channel == channel || channel == "*");
 433     };
 434
 435     auto rp = summary.tail.rbegin();
 436     for (; num > 0 && rp != summary.tail.rend(); ++rp) {
 437       if (match(*rp)) {
 438         num--;
 439       }
 440     }
 441     if (rp == summary.tail.rend()) {
 442       --rp;
 443     }
 444     ostringstream ss;
 445     for (; rp != summary.tail.rbegin(); --rp) {
 446       if (!match(*rp)) {
 447         continue;
 448       }
 449
 450       if (f) {
 451         f->dump_object("entry", *rp);
 452       } else {
 453         ss << *rp << "\n";
 454       }
 455     }
 456     if (f) {
 457       f->close_section();
 458       f->flush(rdata);
 459     } else {
 460       rdata.append(ss.str());
 461     }
 462     r = 0;
 463   } else {
 464     return false;
 465   }
 466
 467   string rs;
 468   getline(ss, rs);
 469   mon->reply_command(op, r, rs, rdata, get_last_committed());
 470   return true;
 471 }
 472
 473
 474 bool LogMonitor::prepare_command(MonOpRequestRef op)
 475 {
 476   op->mark_logmon_event("prepare_command");
 477   MMonCommand *m = static_cast<MMonCommand*>(op->get_req());
 478   stringstream ss;
 479   string rs;
 480   int err = -EINVAL;
 481
 482   map<string, cmd_vartype> cmdmap;
 483   if (!cmdmap_from_json(m->cmd, &cmdmap, ss)) {
 484     // ss has reason for failure
 485     string rs = ss.str();
 486     mon->reply_command(op, -EINVAL, rs, get_last_committed());
 487     return true;
 488   }
 489
 490   string prefix;
 491   cmd_getval(g_ceph_context, cmdmap, "prefix", prefix);
 492
 493   MonSession *session = m->get_session();
 494   if (!session) {
 495     mon->reply_command(op, -EACCES, "access denied", get_last_committed());
 496     return true;
 497   }
 498
 499   if (prefix == "log") {
 500     vector<string> logtext;
 501     cmd_getval(g_ceph_context, cmdmap, "logtext", logtext);
 502     LogEntry le;
 503     le.who = m->get_orig_source_inst();
 504     le.name = session->entity_name;
 505     le.stamp = m->get_recv_stamp();
 506     le.seq = 0;
 507     le.prio = CLOG_INFO;
 508     le.channel = CLOG_CHANNEL_DEFAULT;
 509     le.msg = str_join(logtext, " ");
 510     pending_summary.add(le);
 511     pending_summary.prune(g_conf->mon_log_max_summary);
 512     pending_log.insert(pair<utime_t,LogEntry>(le.stamp, le));
 513     wait_for_finished_proposal(op, new Monitor::C_Command(
 514           mon, op, 0, string(), get_last_committed() + 1));
 515     return true;
 516   }
 517
 518   getline(ss, rs);
 519   mon->reply_command(op, err, rs, get_last_committed());
 520   return false;
 521 }
 522
 523
 524 int LogMonitor::sub_name_to_id(const string& n)
 525 {
 526   if (n.substr(0, 4) == "log-" && n.size() > 4) {
 527     return LogEntry::str_to_level(n.substr(4));
 528   } else {
 529     return CLOG_UNKNOWN;
 530   }
 531 }
 532
 533 void LogMonitor::check_subs()
 534 {
 535   dout(10) << __func__ << dendl;
 536   for (map<string, xlist<Subscription*>*>::iterator i = mon->session_map.subs.begin();
 537        i != mon->session_map.subs.end();
 538        ++i) {
 539     for (xlist<Subscription*>::iterator j = i->second->begin(); !j.end(); ++j) {
 540       if (sub_name_to_id((*j)->type) >= 0)
 541         check_sub(*j);
 542     }
 543   }
 544 }
 545
 546 void LogMonitor::check_sub(Subscription *s)
 547 {
 548   dout(10) << __func__ << " client wants " << s->type << " ver " << s->next << dendl;
 549
 550   int sub_level = sub_name_to_id(s->type);
 551   assert(sub_level >= 0);
 552
 553   version_t summary_version = summary.version;
 554   if (s->next > summary_version) {
 555     dout(10) << __func__ << " client " << s->session->inst
 556             << " requested version (" << s->next << ") is greater than ours ("
 557             << summary_version << "), which means we already sent him"
 558             << " everything we have." << dendl;
 559     return;
 560   }
 561
 562   MLog *mlog = new MLog(mon->monmap->fsid);
 563
 564   if (s->next == 0) {
 565     /* First timer, heh? */
 566     bool ret = _create_sub_summary(mlog, sub_level);
 567     if (!ret) {
 568       dout(1) << __func__ << " ret = " << ret << dendl;
 569       mlog->put();
 570       return;
 571     }
 572   } else {
 573     /* let us send you an incremental log... */
 574     _create_sub_incremental(mlog, sub_level, s->next);
 575   }
 576
 577   dout(1) << __func__ << " sending message to " << s->session->inst
 578           << " with " << mlog->entries.size() << " entries"
 579           << " (version " << mlog->version << ")" << dendl;
 580
 581   if (!mlog->entries.empty()) {
 582     s->session->con->send_message(mlog);
 583   } else {
 584     mlog->put();
 585   }
 586   if (s->onetime)
 587     mon->session_map.remove_sub(s);
 588   else
 589     s->next = summary_version+1;
 590 }
 591
 592 /**
 593  * Create a log message containing only the last message in the summary.
 594  *
 595  * @param mlog  Log message we'll send to the client.
 596  * @param level Maximum log level the client is interested in.
 597  * @return      'true' if we consider we successfully populated @mlog;
 598  *              'false' otherwise.
 599  */
 600 bool LogMonitor::_create_sub_summary(MLog *mlog, int level)
 601 {
 602   dout(10) << __func__ << dendl;
 603
 604   assert(mlog != NULL);
 605
 606   if (!summary.tail.size())
 607     return false;
 608
 609   list<LogEntry>::reverse_iterator it = summary.tail.rbegin();
 610   for (; it != summary.tail.rend(); ++it) {
 611     LogEntry e = *it;
 612     if (e.prio < level)
 613       continue;
 614
 615     mlog->entries.push_back(e);
 616     mlog->version = summary.version;
 617     break;
 618   }
 619
 620   return true;
 621 }
 622
 623 /**
 624  * Create an incremental log message from version \p sv to \p summary.version
 625  *
 626  * @param mlog  Log message we'll send to the client with the messages received
 627  *              since version \p sv, inclusive.
 628  * @param level The max log level of the messages the client is interested in.
 629  * @param sv    The version the client is looking for.
 630  */
 631 void LogMonitor::_create_sub_incremental(MLog *mlog, int level, version_t sv)
 632 {
 633   dout(10) << __func__ << " level " << level << " ver " << sv
 634           << " cur summary ver " << summary.version << dendl;
 635
 636   if (sv < get_first_committed()) {
 637     dout(10) << __func__ << " skipped from " << sv
 638              << " to first_committed " << get_first_committed() << dendl;
 639     LogEntry le;
 640     le.stamp = ceph_clock_now();
 641     le.prio = CLOG_WARN;
 642     ostringstream ss;
 643     ss << "skipped log messages from " << sv << " to " << get_first_committed();
 644     le.msg = ss.str();
 645     mlog->entries.push_back(le);
 646     sv = get_first_committed();
 647   }
 648
 649   version_t summary_ver = summary.version;
 650   while (sv <= summary_ver) {
 651     bufferlist bl;
 652     int err = get_version(sv, bl);
 653     assert(err == 0);
 654     assert(bl.length());
 655     bufferlist::iterator p = bl.begin();
 656     __u8 v;
 657     ::decode(v,p);
 658     while (!p.end()) {
 659       LogEntry le;
 660       le.decode(p);
 661
 662       if (le.prio < level) {
 663         dout(20) << __func__ << " requested " << level
 664                  << " entry " << le.prio << dendl;
 665         continue;
 666       }
 667
 668       mlog->entries.push_back(le);
 669     }
 670     mlog->version = sv++;
 671   }
 672
 673   dout(10) << __func__ << " incremental message ready ("
 674            << mlog->entries.size() << " entries)" << dendl;
 675 }
 676
 677 void LogMonitor::update_log_channels()
 678 {
 679   ostringstream oss;
 680
 681   channels.clear();
 682
 683   int r = get_conf_str_map_helper(g_conf->mon_cluster_log_to_syslog,
 684                                   oss, &channels.log_to_syslog,
 685                                   CLOG_CONFIG_DEFAULT_KEY);
 686   if (r < 0) {
 687     derr << __func__ << " error parsing 'mon_cluster_log_to_syslog'" << dendl;
 688     return;
 689   }
 690
 691   r = get_conf_str_map_helper(g_conf->mon_cluster_log_to_syslog_level,
 692                               oss, &channels.syslog_level,
 693                               CLOG_CONFIG_DEFAULT_KEY);
 694   if (r < 0) {
 695     derr << __func__ << " error parsing 'mon_cluster_log_to_syslog_level'"
 696          << dendl;
 697     return;
 698   }
 699
 700   r = get_conf_str_map_helper(g_conf->mon_cluster_log_to_syslog_facility,
 701                               oss, &channels.syslog_facility,
 702                               CLOG_CONFIG_DEFAULT_KEY);
 703   if (r < 0) {
 704     derr << __func__ << " error parsing 'mon_cluster_log_to_syslog_facility'"
 705          << dendl;
 706     return;
 707   }
 708
 709   r = get_conf_str_map_helper(g_conf->mon_cluster_log_file, oss,
 710                               &channels.log_file,
 711                               CLOG_CONFIG_DEFAULT_KEY);
 712   if (r < 0) {
 713     derr << __func__ << " error parsing 'mon_cluster_log_file'" << dendl;
 714     return;
 715   }
 716
 717   r = get_conf_str_map_helper(g_conf->mon_cluster_log_file_level, oss,
 718                               &channels.log_file_level,
 719                               CLOG_CONFIG_DEFAULT_KEY);
 720   if (r < 0) {
 721     derr << __func__ << " error parsing 'mon_cluster_log_file_level'"
 722          << dendl;
 723     return;
 724   }
 725
 726   r = get_conf_str_map_helper(g_conf->mon_cluster_log_to_graylog, oss,
 727                               &channels.log_to_graylog,
 728                               CLOG_CONFIG_DEFAULT_KEY);
 729   if (r < 0) {
 730     derr << __func__ << " error parsing 'mon_cluster_log_to_graylog'"
 731          << dendl;
 732     return;
 733   }
 734
 735   r = get_conf_str_map_helper(g_conf->mon_cluster_log_to_graylog_host, oss,
 736                               &channels.log_to_graylog_host,
 737                               CLOG_CONFIG_DEFAULT_KEY);
 738   if (r < 0) {
 739     derr << __func__ << " error parsing 'mon_cluster_log_to_graylog_host'"
 740          << dendl;
 741     return;
 742   }
 743
 744   r = get_conf_str_map_helper(g_conf->mon_cluster_log_to_graylog_port, oss,
 745                               &channels.log_to_graylog_port,
 746                               CLOG_CONFIG_DEFAULT_KEY);
 747   if (r < 0) {
 748     derr << __func__ << " error parsing 'mon_cluster_log_to_graylog_port'"
 749          << dendl;
 750     return;
 751   }
 752
 753   channels.expand_channel_meta();
 754 }
 755
 756 void LogMonitor::log_channel_info::expand_channel_meta(map<string,string> &m)
 757 {
 758   generic_dout(20) << __func__ << " expand map: " << m << dendl;
 759   for (map<string,string>::iterator p = m.begin(); p != m.end(); ++p) {
 760     m[p->first] = expand_channel_meta(p->second, p->first);
 761   }
 762   generic_dout(20) << __func__ << " expanded map: " << m << dendl;
 763 }
 764
 765 string LogMonitor::log_channel_info::expand_channel_meta(
 766     const string &input,
 767     const string &change_to)
 768 {
 769   size_t pos = string::npos;
 770   string s(input);
 771   while ((pos = s.find(LOG_META_CHANNEL)) != string::npos) {
 772     string tmp = s.substr(0, pos) + change_to;
 773     if (pos+LOG_META_CHANNEL.length() < s.length())
 774       tmp += s.substr(pos+LOG_META_CHANNEL.length());
 775     s = tmp;
 776   }
 777   generic_dout(20) << __func__ << " from '" << input
 778                    << "' to '" << s << "'" << dendl;
 779
 780   return s;
 781 }
 782
 783 bool LogMonitor::log_channel_info::do_log_to_syslog(const string &channel) {
 784   string v = get_str_map_key(log_to_syslog, channel,
 785                              &CLOG_CONFIG_DEFAULT_KEY);
 786   // We expect booleans, but they are in k/v pairs, kept
 787   // as strings, in 'log_to_syslog'. We must ensure
 788   // compatibility with existing boolean handling, and so
 789   // we are here using a modified version of how
 790   // md_config_t::set_val_raw() handles booleans. We will
 791   // accept both 'true' and 'false', but will also check for
 792   // '1' and '0'. The main distiction between this and the
 793   // original code is that we will assume everything not '1',
 794   // '0', 'true' or 'false' to be 'false'.
 795   bool ret = false;
 796
 797   if (boost::iequals(v, "false")) {
 798     ret = false;
 799   } else if (boost::iequals(v, "true")) {
 800     ret = true;
 801   } else {
 802     std::string err;
 803     int b = strict_strtol(v.c_str(), 10, &err);
 804     ret = (err.empty() && b == 1);
 805   }
 806
 807   return ret;
 808 }
 809
 810 ceph::logging::Graylog::Ref LogMonitor::log_channel_info::get_graylog(
 811     const string &channel)
 812 {
 813   generic_dout(25) << __func__ << " for channel '"
 814                    << channel << "'" << dendl;
 815
 816   if (graylogs.count(channel) == 0) {
 817     auto graylog(std::make_shared<ceph::logging::Graylog>("mon"));
 818
 819     graylog->set_fsid(g_conf->get_val<uuid_d>("fsid"));
 820     graylog->set_hostname(g_conf->host);
 821     graylog->set_destination(get_str_map_key(log_to_graylog_host, channel,
 822                                              &CLOG_CONFIG_DEFAULT_KEY),
 823                              atoi(get_str_map_key(log_to_graylog_port, channel,
 824                                                   &CLOG_CONFIG_DEFAULT_KEY).c_str()));
 825
 826     graylogs[channel] = graylog;
 827     generic_dout(20) << __func__ << " for channel '"
 828                      << channel << "' to graylog host '"
 829                      << log_to_graylog_host[channel] << ":"
 830                      << log_to_graylog_port[channel]
 831                      << "'" << dendl;
 832   }
 833   return graylogs[channel];
 834 }
 835
 836 void LogMonitor::handle_conf_change(const struct md_config_t *conf,
 837                                     const std::set<std::string> &changed)
 838 {
 839   if (changed.count("mon_cluster_log_to_syslog") ||
 840       changed.count("mon_cluster_log_to_syslog_level") ||
 841       changed.count("mon_cluster_log_to_syslog_facility") ||
 842       changed.count("mon_cluster_log_file") ||
 843       changed.count("mon_cluster_log_file_level") ||
 844       changed.count("mon_cluster_log_to_graylog") ||
 845       changed.count("mon_cluster_log_to_graylog_host") ||
 846       changed.count("mon_cluster_log_to_graylog_port")) {
 847     update_log_channels();
 848   }
 849 }