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7c673cae FG |
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) 2009 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 "MonmapMonitor.h" | |
16 | #include "Monitor.h" | |
f67539c2 | 17 | #include "OSDMonitor.h" |
7c673cae FG |
18 | #include "messages/MMonCommand.h" |
19 | #include "messages/MMonJoin.h" | |
20 | ||
21 | #include "common/ceph_argparse.h" | |
22 | #include "common/errno.h" | |
23 | #include <sstream> | |
24 | #include "common/config.h" | |
25 | #include "common/cmdparse.h" | |
26 | ||
11fdf7f2 | 27 | #include "include/ceph_assert.h" |
7c673cae FG |
28 | #include "include/stringify.h" |
29 | ||
30 | #define dout_subsys ceph_subsys_mon | |
31 | #undef dout_prefix | |
32 | #define dout_prefix _prefix(_dout, mon) | |
9f95a23c | 33 | using namespace TOPNSPC::common; |
f67539c2 TL |
34 | |
35 | using std::cout; | |
36 | using std::dec; | |
37 | using std::hex; | |
38 | using std::list; | |
39 | using std::map; | |
40 | using std::make_pair; | |
41 | using std::ostream; | |
42 | using std::ostringstream; | |
43 | using std::pair; | |
44 | using std::set; | |
45 | using std::setfill; | |
46 | using std::string; | |
47 | using std::stringstream; | |
48 | using std::to_string; | |
49 | using std::vector; | |
50 | using std::unique_ptr; | |
51 | ||
52 | using ceph::bufferlist; | |
53 | using ceph::decode; | |
54 | using ceph::encode; | |
55 | using ceph::Formatter; | |
56 | using ceph::JSONFormatter; | |
57 | using ceph::make_message; | |
58 | using ceph::mono_clock; | |
59 | using ceph::mono_time; | |
60 | using ceph::timespan_str; | |
61 | static ostream& _prefix(std::ostream *_dout, Monitor &mon) { | |
62 | return *_dout << "mon." << mon.name << "@" << mon.rank | |
63 | << "(" << mon.get_state_name() | |
64 | << ").monmap v" << mon.monmap->epoch << " "; | |
7c673cae FG |
65 | } |
66 | ||
67 | void MonmapMonitor::create_initial() | |
68 | { | |
224ce89b | 69 | dout(10) << __func__ << " using current monmap" << dendl; |
f67539c2 | 70 | pending_map = *mon.monmap; |
7c673cae | 71 | pending_map.epoch = 1; |
31f18b77 | 72 | |
11fdf7f2 | 73 | if (g_conf()->mon_debug_no_initial_persistent_features) { |
31f18b77 FG |
74 | derr << __func__ << " mon_debug_no_initial_persistent_features=true" |
75 | << dendl; | |
76 | } else { | |
77 | // initialize with default persistent features for new clusters | |
78 | pending_map.persistent_features = ceph::features::mon::get_persistent(); | |
11fdf7f2 | 79 | pending_map.min_mon_release = ceph_release(); |
31f18b77 | 80 | } |
7c673cae FG |
81 | } |
82 | ||
83 | void MonmapMonitor::update_from_paxos(bool *need_bootstrap) | |
84 | { | |
85 | version_t version = get_last_committed(); | |
f67539c2 | 86 | if (version <= mon.monmap->get_epoch()) |
7c673cae FG |
87 | return; |
88 | ||
89 | dout(10) << __func__ << " version " << version | |
f67539c2 | 90 | << ", my v " << mon.monmap->epoch << dendl; |
7c673cae | 91 | |
f67539c2 | 92 | if (need_bootstrap && version != mon.monmap->get_epoch()) { |
7c673cae FG |
93 | dout(10) << " signaling that we need a bootstrap" << dendl; |
94 | *need_bootstrap = true; | |
95 | } | |
96 | ||
97 | // read and decode | |
98 | monmap_bl.clear(); | |
99 | int ret = get_version(version, monmap_bl); | |
11fdf7f2 TL |
100 | ceph_assert(ret == 0); |
101 | ceph_assert(monmap_bl.length()); | |
7c673cae | 102 | |
224ce89b | 103 | dout(10) << __func__ << " got " << version << dendl; |
f67539c2 | 104 | mon.monmap->decode(monmap_bl); |
7c673cae | 105 | |
f67539c2 | 106 | if (mon.store->exists("mkfs", "monmap")) { |
7c673cae FG |
107 | auto t(std::make_shared<MonitorDBStore::Transaction>()); |
108 | t->erase("mkfs", "monmap"); | |
f67539c2 | 109 | mon.store->apply_transaction(t); |
7c673cae FG |
110 | } |
111 | ||
112 | check_subs(); | |
11fdf7f2 TL |
113 | |
114 | // make sure we've recorded min_mon_release | |
115 | string val; | |
f67539c2 | 116 | if (mon.store->read_meta("min_mon_release", &val) < 0 || |
11fdf7f2 TL |
117 | val.size() == 0 || |
118 | atoi(val.c_str()) != (int)ceph_release()) { | |
119 | dout(10) << __func__ << " updating min_mon_release meta" << dendl; | |
f67539c2 | 120 | mon.store->write_meta("min_mon_release", |
11fdf7f2 TL |
121 | stringify(ceph_release())); |
122 | } | |
f67539c2 | 123 | |
b3b6e05e | 124 | mon.notify_new_monmap(true); |
7c673cae FG |
125 | } |
126 | ||
127 | void MonmapMonitor::create_pending() | |
128 | { | |
f67539c2 | 129 | pending_map = *mon.monmap; |
7c673cae FG |
130 | pending_map.epoch++; |
131 | pending_map.last_changed = ceph_clock_now(); | |
224ce89b | 132 | dout(10) << __func__ << " monmap epoch " << pending_map.epoch << dendl; |
7c673cae FG |
133 | } |
134 | ||
135 | void MonmapMonitor::encode_pending(MonitorDBStore::TransactionRef t) | |
136 | { | |
224ce89b | 137 | dout(10) << __func__ << " epoch " << pending_map.epoch << dendl; |
7c673cae | 138 | |
f67539c2 | 139 | ceph_assert(mon.monmap->epoch + 1 == pending_map.epoch || |
7c673cae FG |
140 | pending_map.epoch == 1); // special case mkfs! |
141 | bufferlist bl; | |
f67539c2 | 142 | pending_map.encode(bl, mon.get_quorum_con_features()); |
7c673cae FG |
143 | |
144 | put_version(t, pending_map.epoch, bl); | |
145 | put_last_committed(t, pending_map.epoch); | |
146 | ||
147 | // generate a cluster fingerprint, too? | |
148 | if (pending_map.epoch == 1) { | |
f67539c2 | 149 | mon.prepare_new_fingerprint(t); |
7c673cae | 150 | } |
f67539c2 TL |
151 | |
152 | //health | |
153 | health_check_map_t next; | |
154 | pending_map.check_health(&next); | |
155 | encode_health(next, t); | |
7c673cae FG |
156 | } |
157 | ||
158 | class C_ApplyFeatures : public Context { | |
159 | MonmapMonitor *svc; | |
160 | mon_feature_t features; | |
9f95a23c | 161 | ceph_release_t min_mon_release; |
11fdf7f2 | 162 | public: |
9f95a23c | 163 | C_ApplyFeatures(MonmapMonitor *s, const mon_feature_t& f, ceph_release_t mmr) : |
11fdf7f2 | 164 | svc(s), features(f), min_mon_release(mmr) { } |
7c673cae FG |
165 | void finish(int r) override { |
166 | if (r >= 0) { | |
11fdf7f2 | 167 | svc->apply_mon_features(features, min_mon_release); |
7c673cae FG |
168 | } else if (r == -EAGAIN || r == -ECANCELED) { |
169 | // discard features if we're no longer on the quorum that | |
170 | // established them in the first place. | |
171 | return; | |
172 | } else { | |
11fdf7f2 | 173 | ceph_abort_msg("bad C_ApplyFeatures return value"); |
7c673cae FG |
174 | } |
175 | } | |
176 | }; | |
177 | ||
11fdf7f2 | 178 | void MonmapMonitor::apply_mon_features(const mon_feature_t& features, |
9f95a23c | 179 | ceph_release_t min_mon_release) |
7c673cae FG |
180 | { |
181 | if (!is_writeable()) { | |
182 | dout(5) << __func__ << " wait for service to be writeable" << dendl; | |
11fdf7f2 | 183 | wait_for_writeable_ctx(new C_ApplyFeatures(this, features, min_mon_release)); |
7c673cae FG |
184 | return; |
185 | } | |
186 | ||
11fdf7f2 | 187 | // do nothing here unless we have a full quorum |
f67539c2 | 188 | if (mon.get_quorum().size() < mon.monmap->size()) { |
11fdf7f2 TL |
189 | return; |
190 | } | |
191 | ||
192 | ceph_assert(is_writeable()); | |
193 | ceph_assert(features.contains_all(pending_map.persistent_features)); | |
7c673cae FG |
194 | // we should never hit this because `features` should be the result |
195 | // of the quorum's supported features. But if it happens, die. | |
11fdf7f2 | 196 | ceph_assert(ceph::features::mon::get_supported().contains_all(features)); |
7c673cae FG |
197 | |
198 | mon_feature_t new_features = | |
199 | (pending_map.persistent_features ^ | |
200 | (features & ceph::features::mon::get_persistent())); | |
201 | ||
11fdf7f2 TL |
202 | if (new_features.empty() && |
203 | pending_map.min_mon_release == min_mon_release) { | |
81eedcae | 204 | dout(10) << __func__ << " min_mon_release (" << (int)min_mon_release |
11fdf7f2 | 205 | << ") and features (" << features << ") match" << dendl; |
7c673cae FG |
206 | return; |
207 | } | |
208 | ||
11fdf7f2 TL |
209 | if (!new_features.empty()) { |
210 | dout(1) << __func__ << " applying new features " | |
211 | << new_features << ", had " << pending_map.persistent_features | |
212 | << ", will have " | |
213 | << (new_features | pending_map.persistent_features) | |
214 | << dendl; | |
215 | pending_map.persistent_features |= new_features; | |
216 | } | |
217 | if (min_mon_release > pending_map.min_mon_release) { | |
218 | dout(1) << __func__ << " increasing min_mon_release to " | |
f67539c2 | 219 | << to_integer<int>(min_mon_release) << " (" << min_mon_release |
11fdf7f2 TL |
220 | << ")" << dendl; |
221 | pending_map.min_mon_release = min_mon_release; | |
7c673cae FG |
222 | } |
223 | ||
7c673cae FG |
224 | propose_pending(); |
225 | } | |
226 | ||
227 | void MonmapMonitor::on_active() | |
228 | { | |
f67539c2 | 229 | if (get_last_committed() >= 1 && !mon.has_ever_joined) { |
7c673cae FG |
230 | // make note of the fact that i was, once, part of the quorum. |
231 | dout(10) << "noting that i was, once, part of an active quorum." << dendl; | |
232 | ||
233 | /* This is some form of nasty in-breeding we have between the MonmapMonitor | |
234 | and the Monitor itself. We should find a way to get rid of it given our | |
235 | new architecture. Until then, stick with it since we are a | |
236 | single-threaded process and, truth be told, no one else relies on this | |
237 | thing besides us. | |
238 | */ | |
239 | auto t(std::make_shared<MonitorDBStore::Transaction>()); | |
240 | t->put(Monitor::MONITOR_NAME, "joined", 1); | |
f67539c2 TL |
241 | mon.store->apply_transaction(t); |
242 | mon.has_ever_joined = true; | |
7c673cae FG |
243 | } |
244 | ||
f67539c2 TL |
245 | if (mon.is_leader()) { |
246 | mon.clog->debug() << "monmap " << *mon.monmap; | |
b32b8144 | 247 | } |
7c673cae | 248 | |
f67539c2 TL |
249 | apply_mon_features(mon.get_quorum_mon_features(), |
250 | mon.quorum_min_mon_release); | |
7c673cae FG |
251 | } |
252 | ||
253 | bool MonmapMonitor::preprocess_query(MonOpRequestRef op) | |
254 | { | |
9f95a23c | 255 | auto m = op->get_req<PaxosServiceMessage>(); |
7c673cae FG |
256 | switch (m->get_type()) { |
257 | // READs | |
258 | case MSG_MON_COMMAND: | |
f64942e4 AA |
259 | try { |
260 | return preprocess_command(op); | |
261 | } | |
262 | catch (const bad_cmd_get& e) { | |
263 | bufferlist bl; | |
f67539c2 | 264 | mon.reply_command(op, -EINVAL, e.what(), bl, get_last_committed()); |
f64942e4 AA |
265 | return true; |
266 | } | |
7c673cae FG |
267 | case MSG_MON_JOIN: |
268 | return preprocess_join(op); | |
269 | default: | |
270 | ceph_abort(); | |
271 | return true; | |
272 | } | |
273 | } | |
274 | ||
275 | void MonmapMonitor::dump_info(Formatter *f) | |
276 | { | |
277 | f->dump_unsigned("monmap_first_committed", get_first_committed()); | |
278 | f->dump_unsigned("monmap_last_committed", get_last_committed()); | |
279 | f->open_object_section("monmap"); | |
f67539c2 | 280 | mon.monmap->dump(f); |
7c673cae FG |
281 | f->close_section(); |
282 | f->open_array_section("quorum"); | |
f67539c2 | 283 | for (set<int>::iterator q = mon.get_quorum().begin(); q != mon.get_quorum().end(); ++q) |
7c673cae FG |
284 | f->dump_int("mon", *q); |
285 | f->close_section(); | |
286 | } | |
287 | ||
288 | bool MonmapMonitor::preprocess_command(MonOpRequestRef op) | |
289 | { | |
9f95a23c | 290 | auto m = op->get_req<MMonCommand>(); |
7c673cae FG |
291 | int r = -1; |
292 | bufferlist rdata; | |
293 | stringstream ss; | |
294 | ||
11fdf7f2 | 295 | cmdmap_t cmdmap; |
7c673cae FG |
296 | if (!cmdmap_from_json(m->cmd, &cmdmap, ss)) { |
297 | string rs = ss.str(); | |
f67539c2 | 298 | mon.reply_command(op, -EINVAL, rs, rdata, get_last_committed()); |
7c673cae FG |
299 | return true; |
300 | } | |
301 | ||
302 | string prefix; | |
9f95a23c | 303 | cmd_getval(cmdmap, "prefix", prefix); |
7c673cae | 304 | |
11fdf7f2 | 305 | MonSession *session = op->get_session(); |
7c673cae | 306 | if (!session) { |
f67539c2 | 307 | mon.reply_command(op, -EACCES, "access denied", get_last_committed()); |
7c673cae FG |
308 | return true; |
309 | } | |
310 | ||
311 | string format; | |
9f95a23c | 312 | cmd_getval(cmdmap, "format", format, string("plain")); |
7c673cae FG |
313 | boost::scoped_ptr<Formatter> f(Formatter::create(format)); |
314 | ||
315 | if (prefix == "mon stat") { | |
f91f0fd5 TL |
316 | if (f) { |
317 | f->open_object_section("monmap"); | |
f67539c2 TL |
318 | mon.monmap->dump_summary(f.get()); |
319 | f->dump_string("leader", mon.get_leader_name()); | |
f91f0fd5 | 320 | f->open_array_section("quorum"); |
f67539c2 TL |
321 | for (auto rank: mon.get_quorum()) { |
322 | std::string name = mon.monmap->get_name(rank); | |
f91f0fd5 TL |
323 | f->open_object_section("mon"); |
324 | f->dump_int("rank", rank); | |
325 | f->dump_string("name", name); | |
326 | f->close_section(); // mon | |
327 | } | |
328 | f->close_section(); // quorum | |
329 | f->close_section(); // monmap | |
330 | f->flush(ss); | |
331 | } else { | |
f67539c2 TL |
332 | mon.monmap->print_summary(ss); |
333 | ss << ", election epoch " << mon.get_epoch() << ", leader " | |
334 | << mon.get_leader() << " " << mon.get_leader_name() | |
335 | << ", quorum " << mon.get_quorum() | |
336 | << " " << mon.get_quorum_names(); | |
f91f0fd5 TL |
337 | } |
338 | ||
7c673cae FG |
339 | rdata.append(ss); |
340 | ss.str(""); | |
341 | r = 0; | |
342 | ||
343 | } else if (prefix == "mon getmap" || | |
344 | prefix == "mon dump") { | |
345 | ||
346 | epoch_t epoch; | |
347 | int64_t epochnum; | |
9f95a23c | 348 | cmd_getval(cmdmap, "epoch", epochnum, (int64_t)0); |
7c673cae FG |
349 | epoch = epochnum; |
350 | ||
f67539c2 | 351 | MonMap *p = mon.monmap; |
7c673cae FG |
352 | if (epoch) { |
353 | bufferlist bl; | |
354 | r = get_version(epoch, bl); | |
355 | if (r == -ENOENT) { | |
356 | ss << "there is no map for epoch " << epoch; | |
357 | goto reply; | |
358 | } | |
11fdf7f2 TL |
359 | ceph_assert(r == 0); |
360 | ceph_assert(bl.length() > 0); | |
7c673cae FG |
361 | p = new MonMap; |
362 | p->decode(bl); | |
363 | } | |
364 | ||
11fdf7f2 | 365 | ceph_assert(p); |
7c673cae FG |
366 | |
367 | if (prefix == "mon getmap") { | |
368 | p->encode(rdata, m->get_connection()->get_features()); | |
369 | r = 0; | |
370 | ss << "got monmap epoch " << p->get_epoch(); | |
371 | } else if (prefix == "mon dump") { | |
372 | stringstream ds; | |
373 | if (f) { | |
374 | f->open_object_section("monmap"); | |
375 | p->dump(f.get()); | |
376 | f->open_array_section("quorum"); | |
f67539c2 TL |
377 | for (set<int>::iterator q = mon.get_quorum().begin(); |
378 | q != mon.get_quorum().end(); ++q) { | |
7c673cae FG |
379 | f->dump_int("mon", *q); |
380 | } | |
381 | f->close_section(); | |
382 | f->close_section(); | |
383 | f->flush(ds); | |
384 | r = 0; | |
385 | } else { | |
386 | p->print(ds); | |
387 | r = 0; | |
388 | } | |
389 | rdata.append(ds); | |
390 | ss << "dumped monmap epoch " << p->get_epoch(); | |
391 | } | |
f67539c2 | 392 | if (p != mon.monmap) { |
7c673cae | 393 | delete p; |
11fdf7f2 TL |
394 | p = nullptr; |
395 | } | |
7c673cae | 396 | |
224ce89b | 397 | } else if (prefix == "mon feature ls") { |
7c673cae FG |
398 | |
399 | bool list_with_value = false; | |
400 | string with_value; | |
9f95a23c | 401 | if (cmd_getval(cmdmap, "with_value", with_value) && |
7c673cae FG |
402 | with_value == "--with-value") { |
403 | list_with_value = true; | |
404 | } | |
405 | ||
f67539c2 | 406 | MonMap *p = mon.monmap; |
7c673cae FG |
407 | |
408 | // list features | |
409 | mon_feature_t supported = ceph::features::mon::get_supported(); | |
410 | mon_feature_t persistent = ceph::features::mon::get_persistent(); | |
411 | mon_feature_t required = p->get_required_features(); | |
412 | ||
413 | stringstream ds; | |
414 | auto print_feature = [&](mon_feature_t& m_features, const char* m_str) { | |
415 | if (f) { | |
416 | if (list_with_value) | |
417 | m_features.dump_with_value(f.get(), m_str); | |
418 | else | |
419 | m_features.dump(f.get(), m_str); | |
420 | } else { | |
421 | if (list_with_value) | |
422 | m_features.print_with_value(ds); | |
423 | else | |
424 | m_features.print(ds); | |
425 | } | |
426 | }; | |
427 | ||
428 | if (f) { | |
429 | f->open_object_section("features"); | |
430 | ||
431 | f->open_object_section("all"); | |
432 | print_feature(supported, "supported"); | |
433 | print_feature(persistent, "persistent"); | |
434 | f->close_section(); // all | |
435 | ||
436 | f->open_object_section("monmap"); | |
437 | print_feature(p->persistent_features, "persistent"); | |
438 | print_feature(p->optional_features, "optional"); | |
439 | print_feature(required, "required"); | |
440 | f->close_section(); // monmap | |
441 | ||
442 | f->close_section(); // features | |
443 | f->flush(ds); | |
444 | ||
445 | } else { | |
446 | ds << "all features" << std::endl | |
447 | << "\tsupported: "; | |
448 | print_feature(supported, nullptr); | |
449 | ds << std::endl | |
450 | << "\tpersistent: "; | |
451 | print_feature(persistent, nullptr); | |
452 | ds << std::endl | |
453 | << std::endl; | |
454 | ||
455 | ds << "on current monmap (epoch " | |
456 | << p->get_epoch() << ")" << std::endl | |
457 | << "\tpersistent: "; | |
458 | print_feature(p->persistent_features, nullptr); | |
459 | ds << std::endl | |
460 | // omit optional features in plain-text | |
461 | // makes it easier to read, and they're, currently, empty. | |
462 | << "\trequired: "; | |
463 | print_feature(required, nullptr); | |
464 | ds << std::endl; | |
465 | } | |
466 | rdata.append(ds); | |
467 | r = 0; | |
468 | } | |
469 | ||
470 | reply: | |
471 | if (r != -1) { | |
472 | string rs; | |
473 | getline(ss, rs); | |
474 | ||
f67539c2 | 475 | mon.reply_command(op, r, rs, rdata, get_last_committed()); |
7c673cae FG |
476 | return true; |
477 | } else | |
478 | return false; | |
479 | } | |
480 | ||
481 | ||
482 | bool MonmapMonitor::prepare_update(MonOpRequestRef op) | |
483 | { | |
9f95a23c | 484 | auto m = op->get_req<PaxosServiceMessage>(); |
224ce89b | 485 | dout(7) << __func__ << " " << *m << " from " << m->get_orig_source_inst() << dendl; |
7c673cae FG |
486 | |
487 | switch (m->get_type()) { | |
488 | case MSG_MON_COMMAND: | |
f64942e4 AA |
489 | try { |
490 | return prepare_command(op); | |
11fdf7f2 | 491 | } catch (const bad_cmd_get& e) { |
f64942e4 | 492 | bufferlist bl; |
f67539c2 | 493 | mon.reply_command(op, -EINVAL, e.what(), bl, get_last_committed()); |
f64942e4 AA |
494 | return true; |
495 | } | |
7c673cae FG |
496 | case MSG_MON_JOIN: |
497 | return prepare_join(op); | |
498 | default: | |
499 | ceph_abort(); | |
500 | } | |
501 | ||
502 | return false; | |
503 | } | |
504 | ||
505 | bool MonmapMonitor::prepare_command(MonOpRequestRef op) | |
506 | { | |
9f95a23c | 507 | auto m = op->get_req<MMonCommand>(); |
7c673cae FG |
508 | stringstream ss; |
509 | string rs; | |
510 | int err = -EINVAL; | |
511 | ||
11fdf7f2 | 512 | cmdmap_t cmdmap; |
7c673cae FG |
513 | if (!cmdmap_from_json(m->cmd, &cmdmap, ss)) { |
514 | string rs = ss.str(); | |
f67539c2 | 515 | mon.reply_command(op, -EINVAL, rs, get_last_committed()); |
7c673cae FG |
516 | return true; |
517 | } | |
518 | ||
519 | string prefix; | |
9f95a23c | 520 | cmd_getval(cmdmap, "prefix", prefix); |
7c673cae | 521 | |
11fdf7f2 | 522 | MonSession *session = op->get_session(); |
7c673cae | 523 | if (!session) { |
f67539c2 | 524 | mon.reply_command(op, -EACCES, "access denied", get_last_committed()); |
7c673cae FG |
525 | return true; |
526 | } | |
527 | ||
528 | /* We should follow the following rules: | |
529 | * | |
530 | * - 'monmap' is the current, consistent version of the monmap | |
531 | * - 'pending_map' is the uncommitted version of the monmap | |
532 | * | |
533 | * All checks for the current state must be made against 'monmap'. | |
534 | * All changes are made against 'pending_map'. | |
535 | * | |
536 | * If there are concurrent operations modifying 'pending_map', please | |
537 | * follow the following rules. | |
538 | * | |
539 | * - if pending_map has already been changed, the second operation must | |
540 | * wait for the proposal to finish and be run again; This is the easiest | |
541 | * path to guarantee correctness but may impact performance (i.e., it | |
542 | * will take longer for the user to get a reply). | |
543 | * | |
544 | * - if the result of the second operation can be guaranteed to be | |
545 | * idempotent, the operation may reply to the user once the proposal | |
546 | * finishes; still needs to wait for the proposal to finish. | |
547 | * | |
548 | * - An operation _NEVER_ returns to the user based on pending state. | |
549 | * | |
550 | * If an operation does not modify current stable monmap, it may be | |
551 | * serialized before current pending map, regardless of any change that | |
552 | * has been made to the pending map -- remember, pending is uncommitted | |
553 | * state, thus we are not bound by it. | |
554 | */ | |
555 | ||
f67539c2 TL |
556 | ceph_assert(mon.monmap); |
557 | MonMap &monmap = *mon.monmap; | |
7c673cae FG |
558 | |
559 | ||
560 | /* Please note: | |
561 | * | |
562 | * Adding or removing monitors may lead to loss of quorum. | |
563 | * | |
564 | * Because quorum may be lost, it's important to reply something | |
565 | * to the user, lest she end up waiting forever for a reply. And | |
566 | * no reply will ever be sent until quorum is formed again. | |
567 | * | |
568 | * On the other hand, this means we're leaking uncommitted state | |
569 | * to the user. As such, please be mindful of the reply message. | |
570 | * | |
571 | * e.g., 'adding monitor mon.foo' is okay ('adding' is an on-going | |
572 | * operation and conveys its not-yet-permanent nature); whereas | |
573 | * 'added monitor mon.foo' presumes the action has successfully | |
574 | * completed and state has been committed, which may not be true. | |
575 | */ | |
576 | ||
577 | ||
578 | bool propose = false; | |
579 | if (prefix == "mon add") { | |
580 | string name; | |
9f95a23c | 581 | cmd_getval(cmdmap, "name", name); |
7c673cae | 582 | string addrstr; |
9f95a23c | 583 | cmd_getval(cmdmap, "addr", addrstr); |
7c673cae FG |
584 | entity_addr_t addr; |
585 | bufferlist rdata; | |
586 | ||
587 | if (!addr.parse(addrstr.c_str())) { | |
588 | err = -EINVAL; | |
589 | ss << "addr " << addrstr << "does not parse"; | |
590 | goto reply; | |
591 | } | |
592 | ||
f67539c2 TL |
593 | vector<string> locationvec; |
594 | map<string, string> loc; | |
595 | cmd_getval(cmdmap, "location", locationvec); | |
596 | CrushWrapper::parse_loc_map(locationvec, &loc); | |
597 | if (locationvec.size() && | |
598 | !mon.get_quorum_mon_features().contains_all( | |
599 | ceph::features::mon::FEATURE_PINGING)) { | |
600 | err = -ENOTSUP; | |
601 | ss << "Not all monitors support adding monitors with a location; please upgrade first!"; | |
602 | goto reply; | |
603 | } | |
604 | if (locationvec.size() && !loc.size()) { | |
605 | ss << "We could not parse your input location to anything real; " << locationvec | |
606 | << " turned into an empty map!"; | |
607 | err = -EINVAL; | |
608 | goto reply; | |
609 | } | |
610 | ||
611 | dout(10) << "mon add setting location for " << name << " to " << loc << dendl; | |
612 | ||
613 | // TODO: validate location in crush map | |
614 | if (monmap.stretch_mode_enabled && !loc.size()) { | |
615 | ss << "We are in stretch mode and new monitors must have a location, but " | |
616 | << "could not parse your input location to anything real; " << locationvec | |
617 | << " turned into an empty map!"; | |
618 | err = -EINVAL; | |
619 | goto reply; | |
620 | } | |
621 | // TODO: validate location against any existing stretch config | |
622 | ||
11fdf7f2 TL |
623 | entity_addrvec_t addrs; |
624 | if (monmap.persistent_features.contains_all( | |
625 | ceph::features::mon::FEATURE_NAUTILUS)) { | |
626 | if (addr.get_port() == CEPH_MON_PORT_IANA) { | |
627 | addr.set_type(entity_addr_t::TYPE_MSGR2); | |
628 | } | |
629 | if (addr.get_port() == CEPH_MON_PORT_LEGACY) { | |
630 | // if they specified the *old* default they probably don't care | |
631 | addr.set_port(0); | |
632 | } | |
633 | if (addr.get_port()) { | |
634 | addrs.v.push_back(addr); | |
635 | } else { | |
636 | addr.set_type(entity_addr_t::TYPE_MSGR2); | |
637 | addr.set_port(CEPH_MON_PORT_IANA); | |
638 | addrs.v.push_back(addr); | |
639 | addr.set_type(entity_addr_t::TYPE_LEGACY); | |
640 | addr.set_port(CEPH_MON_PORT_LEGACY); | |
641 | addrs.v.push_back(addr); | |
642 | } | |
643 | } else { | |
644 | if (addr.get_port() == 0) { | |
645 | addr.set_port(CEPH_MON_PORT_LEGACY); | |
646 | } | |
647 | addr.set_type(entity_addr_t::TYPE_LEGACY); | |
648 | addrs.v.push_back(addr); | |
7c673cae | 649 | } |
11fdf7f2 | 650 | dout(20) << __func__ << " addr " << addr << " -> addrs " << addrs << dendl; |
7c673cae FG |
651 | |
652 | /** | |
653 | * If we have a monitor with the same name and different addr, then EEXIST | |
654 | * If we have a monitor with the same addr and different name, then EEXIST | |
655 | * If we have a monitor with the same addr and same name, then wait for | |
656 | * the proposal to finish and return success. | |
657 | * If we don't have the monitor, add it. | |
658 | */ | |
659 | ||
660 | err = 0; | |
661 | if (!ss.str().empty()) | |
662 | ss << "; "; | |
663 | ||
664 | do { | |
665 | if (monmap.contains(name)) { | |
11fdf7f2 | 666 | if (monmap.get_addrs(name) == addrs) { |
7c673cae FG |
667 | // stable map contains monitor with the same name at the same address. |
668 | // serialize before current pending map. | |
669 | err = 0; // for clarity; this has already been set above. | |
11fdf7f2 | 670 | ss << "mon." << name << " at " << addrs << " already exists"; |
7c673cae FG |
671 | goto reply; |
672 | } else { | |
673 | ss << "mon." << name | |
11fdf7f2 | 674 | << " already exists at address " << monmap.get_addrs(name); |
7c673cae | 675 | } |
11fdf7f2 | 676 | } else if (monmap.contains(addrs)) { |
7c673cae | 677 | // we established on the previous branch that name is different |
11fdf7f2 | 678 | ss << "mon." << monmap.get_name(addrs) |
7c673cae FG |
679 | << " already exists at address " << addr; |
680 | } else { | |
681 | // go ahead and add | |
682 | break; | |
683 | } | |
684 | err = -EEXIST; | |
685 | goto reply; | |
686 | } while (false); | |
687 | ||
f67539c2 TL |
688 | if (pending_map.stretch_mode_enabled) { |
689 | ||
690 | } | |
691 | ||
7c673cae FG |
692 | /* Given there's no delay between proposals on the MonmapMonitor (see |
693 | * MonmapMonitor::should_propose()), there is no point in checking for | |
694 | * a mismatch between name and addr on pending_map. | |
695 | * | |
696 | * Once we established the monitor does not exist in the committed state, | |
697 | * we can simply go ahead and add the monitor. | |
698 | */ | |
699 | ||
11fdf7f2 | 700 | pending_map.add(name, addrs); |
f67539c2 | 701 | pending_map.mon_info[name].crush_loc = loc; |
7c673cae | 702 | pending_map.last_changed = ceph_clock_now(); |
11fdf7f2 | 703 | ss << "adding mon." << name << " at " << addrs; |
7c673cae FG |
704 | propose = true; |
705 | dout(0) << __func__ << " proposing new mon." << name << dendl; | |
706 | ||
707 | } else if (prefix == "mon remove" || | |
708 | prefix == "mon rm") { | |
709 | string name; | |
9f95a23c | 710 | cmd_getval(cmdmap, "name", name); |
7c673cae FG |
711 | if (!monmap.contains(name)) { |
712 | err = 0; | |
713 | ss << "mon." << name << " does not exist or has already been removed"; | |
714 | goto reply; | |
715 | } | |
716 | ||
717 | if (monmap.size() == 1) { | |
718 | err = -EINVAL; | |
719 | ss << "error: refusing removal of last monitor " << name; | |
720 | goto reply; | |
721 | } | |
722 | ||
a4b75251 TL |
723 | if (pending_map.stretch_mode_enabled && |
724 | name == pending_map.tiebreaker_mon) { | |
725 | err = -EINVAL; | |
726 | ss << "you cannot remove stretch mode's tiebreaker monitor"; | |
727 | goto reply; | |
728 | } | |
7c673cae FG |
729 | /* At the time of writing, there is no risk of races when multiple clients |
730 | * attempt to use the same name. The reason is simple but may not be | |
731 | * obvious. | |
732 | * | |
733 | * In a nutshell, we do not collate proposals on the MonmapMonitor. As | |
734 | * soon as we return 'true' below, PaxosService::dispatch() will check if | |
735 | * the service should propose, and - if so - the service will be marked as | |
736 | * 'proposing' and a proposal will be triggered. The PaxosService class | |
737 | * guarantees that once a service is marked 'proposing' no further writes | |
738 | * will be handled. | |
739 | * | |
740 | * The decision on whether the service should propose or not is, in this | |
741 | * case, made by MonmapMonitor::should_propose(), which always considers | |
742 | * the proposal delay being 0.0 seconds. This is key for PaxosService to | |
743 | * trigger the proposal immediately. | |
744 | * 0.0 seconds of delay. | |
745 | * | |
746 | * From the above, there's no point in performing further checks on the | |
747 | * pending_map, as we don't ever have multiple proposals in-flight in | |
748 | * this service. As we've established the committed state contains the | |
749 | * monitor, we can simply go ahead and remove it. | |
750 | * | |
751 | * Please note that the code hinges on all of the above to be true. It | |
752 | * has been true since time immemorial and we don't see a good reason | |
753 | * to make it sturdier at this time - mainly because we don't think it's | |
754 | * going to change any time soon, lest for any bug that may be unwillingly | |
755 | * introduced. | |
756 | */ | |
757 | ||
11fdf7f2 | 758 | entity_addrvec_t addrs = pending_map.get_addrs(name); |
7c673cae | 759 | pending_map.remove(name); |
a4b75251 | 760 | pending_map.disallowed_leaders.erase(name); |
7c673cae | 761 | pending_map.last_changed = ceph_clock_now(); |
11fdf7f2 | 762 | ss << "removing mon." << name << " at " << addrs |
7c673cae FG |
763 | << ", there will be " << pending_map.size() << " monitors" ; |
764 | propose = true; | |
765 | err = 0; | |
766 | ||
767 | } else if (prefix == "mon feature set") { | |
768 | ||
769 | /* PLEASE NOTE: | |
770 | * | |
771 | * We currently only support setting/unsetting persistent features. | |
772 | * This is by design, given at the moment we still don't have optional | |
773 | * features, and, as such, there is no point introducing an interface | |
774 | * to manipulate them. This allows us to provide a cleaner, more | |
775 | * intuitive interface to the user, modifying solely persistent | |
776 | * features. | |
777 | * | |
778 | * In the future we should consider adding another interface to handle | |
779 | * optional features/flags; e.g., 'mon feature flag set/unset', or | |
780 | * 'mon flag set/unset'. | |
781 | */ | |
782 | string feature_name; | |
9f95a23c | 783 | if (!cmd_getval(cmdmap, "feature_name", feature_name)) { |
7c673cae FG |
784 | ss << "missing required feature name"; |
785 | err = -EINVAL; | |
786 | goto reply; | |
787 | } | |
788 | ||
789 | mon_feature_t feature; | |
790 | feature = ceph::features::mon::get_feature_by_name(feature_name); | |
791 | if (feature == ceph::features::mon::FEATURE_NONE) { | |
792 | ss << "unknown feature '" << feature_name << "'"; | |
793 | err = -ENOENT; | |
794 | goto reply; | |
795 | } | |
796 | ||
11fdf7f2 | 797 | bool sure = false; |
9f95a23c | 798 | cmd_getval(cmdmap, "yes_i_really_mean_it", sure); |
11fdf7f2 | 799 | if (!sure) { |
7c673cae FG |
800 | ss << "please specify '--yes-i-really-mean-it' if you " |
801 | << "really, **really** want to set feature '" | |
802 | << feature << "' in the monmap."; | |
803 | err = -EPERM; | |
804 | goto reply; | |
805 | } | |
806 | ||
f67539c2 | 807 | if (!mon.get_quorum_mon_features().contains_all(feature)) { |
7c673cae FG |
808 | ss << "current quorum does not support feature '" << feature |
809 | << "'; supported features: " | |
f67539c2 | 810 | << mon.get_quorum_mon_features(); |
7c673cae FG |
811 | err = -EINVAL; |
812 | goto reply; | |
813 | } | |
814 | ||
815 | ss << "setting feature '" << feature << "'"; | |
816 | ||
817 | err = 0; | |
818 | if (monmap.persistent_features.contains_all(feature)) { | |
819 | dout(10) << __func__ << " feature '" << feature | |
820 | << "' already set on monmap; no-op." << dendl; | |
821 | goto reply; | |
822 | } | |
823 | ||
824 | pending_map.persistent_features.set_feature(feature); | |
825 | pending_map.last_changed = ceph_clock_now(); | |
826 | propose = true; | |
827 | ||
11fdf7f2 | 828 | dout(1) << __func__ << " " << ss.str() << "; new features will be: " |
7c673cae FG |
829 | << "persistent = " << pending_map.persistent_features |
830 | // output optional nevertheless, for auditing purposes. | |
831 | << ", optional = " << pending_map.optional_features << dendl; | |
11fdf7f2 TL |
832 | |
833 | } else if (prefix == "mon set-rank") { | |
834 | string name; | |
835 | int64_t rank; | |
9f95a23c TL |
836 | if (!cmd_getval(cmdmap, "name", name) || |
837 | !cmd_getval(cmdmap, "rank", rank)) { | |
11fdf7f2 TL |
838 | err = -EINVAL; |
839 | goto reply; | |
840 | } | |
841 | int oldrank = pending_map.get_rank(name); | |
842 | if (oldrank < 0) { | |
843 | ss << "mon." << name << " does not exist in monmap"; | |
844 | err = -ENOENT; | |
845 | goto reply; | |
846 | } | |
847 | err = 0; | |
848 | pending_map.set_rank(name, rank); | |
849 | pending_map.last_changed = ceph_clock_now(); | |
850 | propose = true; | |
851 | } else if (prefix == "mon set-addrs") { | |
852 | string name; | |
853 | string addrs; | |
9f95a23c TL |
854 | if (!cmd_getval(cmdmap, "name", name) || |
855 | !cmd_getval(cmdmap, "addrs", addrs)) { | |
11fdf7f2 TL |
856 | err = -EINVAL; |
857 | goto reply; | |
858 | } | |
859 | if (!pending_map.contains(name)) { | |
860 | ss << "mon." << name << " does not exist"; | |
861 | err = -ENOENT; | |
862 | goto reply; | |
863 | } | |
864 | entity_addrvec_t av; | |
865 | if (!av.parse(addrs.c_str(), nullptr)) { | |
866 | ss << "failed to parse addrs '" << addrs << "'"; | |
867 | err = -EINVAL; | |
868 | goto reply; | |
869 | } | |
870 | for (auto& a : av.v) { | |
871 | a.set_nonce(0); | |
872 | if (!a.get_port()) { | |
873 | ss << "monitor must bind to a non-zero port, not " << a; | |
874 | err = -EINVAL; | |
875 | goto reply; | |
876 | } | |
877 | } | |
878 | err = 0; | |
879 | pending_map.set_addrvec(name, av); | |
880 | pending_map.last_changed = ceph_clock_now(); | |
881 | propose = true; | |
9f95a23c TL |
882 | } else if (prefix == "mon set-weight") { |
883 | string name; | |
884 | int64_t weight; | |
885 | if (!cmd_getval(cmdmap, "name", name) || | |
886 | !cmd_getval(cmdmap, "weight", weight)) { | |
887 | err = -EINVAL; | |
888 | goto reply; | |
889 | } | |
890 | if (!pending_map.contains(name)) { | |
891 | ss << "mon." << name << " does not exist"; | |
892 | err = -ENOENT; | |
893 | goto reply; | |
894 | } | |
895 | err = 0; | |
896 | pending_map.set_weight(name, weight); | |
897 | pending_map.last_changed = ceph_clock_now(); | |
898 | propose = true; | |
11fdf7f2 TL |
899 | } else if (prefix == "mon enable-msgr2") { |
900 | if (!monmap.get_required_features().contains_all( | |
901 | ceph::features::mon::FEATURE_NAUTILUS)) { | |
902 | err = -EACCES; | |
903 | ss << "all monitors must be running nautilus to enable v2"; | |
904 | goto reply; | |
905 | } | |
906 | for (auto& i : pending_map.mon_info) { | |
907 | if (i.second.public_addrs.v.size() == 1 && | |
908 | i.second.public_addrs.front().is_legacy() && | |
909 | i.second.public_addrs.front().get_port() == CEPH_MON_PORT_LEGACY) { | |
910 | entity_addrvec_t av; | |
911 | entity_addr_t a = i.second.public_addrs.front(); | |
912 | a.set_type(entity_addr_t::TYPE_MSGR2); | |
913 | a.set_port(CEPH_MON_PORT_IANA); | |
914 | av.v.push_back(a); | |
915 | av.v.push_back(i.second.public_addrs.front()); | |
916 | dout(10) << " setting mon." << i.first | |
917 | << " addrs " << i.second.public_addrs | |
918 | << " -> " << av << dendl; | |
919 | pending_map.set_addrvec(i.first, av); | |
920 | propose = true; | |
921 | pending_map.last_changed = ceph_clock_now(); | |
922 | } | |
923 | } | |
924 | err = 0; | |
f67539c2 TL |
925 | } else if (prefix == "mon set election_strategy") { |
926 | if (!mon.get_quorum_mon_features().contains_all( | |
927 | ceph::features::mon::FEATURE_PINGING)) { | |
928 | err = -ENOTSUP; | |
929 | ss << "Not all monitors support changing election strategies; please upgrade first!"; | |
930 | goto reply; | |
931 | } | |
932 | string strat; | |
933 | MonMap::election_strategy strategy; | |
934 | if (!cmd_getval(cmdmap, "strategy", strat)) { | |
935 | err = -EINVAL; | |
936 | goto reply; | |
937 | } | |
938 | if (strat == "classic") { | |
939 | strategy = MonMap::CLASSIC; | |
940 | } else if (strat == "disallow") { | |
941 | strategy = MonMap::DISALLOW; | |
942 | } else if (strat == "connectivity") { | |
943 | strategy = MonMap::CONNECTIVITY; | |
944 | } else { | |
945 | err = -EINVAL; | |
946 | goto reply; | |
947 | } | |
948 | err = 0; | |
949 | pending_map.strategy = strategy; | |
a4b75251 | 950 | pending_map.last_changed = ceph_clock_now(); |
f67539c2 TL |
951 | propose = true; |
952 | } else if (prefix == "mon add disallowed_leader") { | |
953 | if (!mon.get_quorum_mon_features().contains_all( | |
954 | ceph::features::mon::FEATURE_PINGING)) { | |
955 | err = -ENOTSUP; | |
956 | ss << "Not all monitors support changing election strategies; please upgrade first!"; | |
957 | goto reply; | |
958 | } | |
959 | string name; | |
960 | if (!cmd_getval(cmdmap, "name", name)) { | |
961 | err = -EINVAL; | |
962 | goto reply; | |
963 | } | |
964 | if (pending_map.strategy != MonMap::DISALLOW && | |
965 | pending_map.strategy != MonMap::CONNECTIVITY) { | |
966 | ss << "You cannot disallow monitors in your current election mode"; | |
967 | err = -EINVAL; | |
968 | goto reply; | |
969 | } | |
970 | if (!pending_map.contains(name)) { | |
971 | ss << "mon." << name << " does not exist"; | |
972 | err = -ENOENT; | |
973 | goto reply; | |
974 | } | |
975 | if (pending_map.disallowed_leaders.count(name)) { | |
976 | ss << "mon." << name << " is already disallowed"; | |
977 | err = 0; | |
978 | goto reply; | |
979 | } | |
980 | if (pending_map.disallowed_leaders.size() == pending_map.size() - 1) { | |
981 | ss << "mon." << name << " is the only remaining allowed leader!"; | |
982 | err = -EINVAL; | |
983 | goto reply; | |
984 | } | |
985 | pending_map.disallowed_leaders.insert(name); | |
a4b75251 | 986 | pending_map.last_changed = ceph_clock_now(); |
f67539c2 TL |
987 | err = 0; |
988 | propose = true; | |
989 | } else if (prefix == "mon rm disallowed_leader") { | |
990 | if (!mon.get_quorum_mon_features().contains_all( | |
991 | ceph::features::mon::FEATURE_PINGING)) { | |
992 | err = -ENOTSUP; | |
993 | ss << "Not all monitors support changing election strategies; please upgrade first!"; | |
994 | goto reply; | |
995 | } | |
996 | string name; | |
997 | if (!cmd_getval(cmdmap, "name", name)) { | |
998 | err = -EINVAL; | |
999 | goto reply; | |
1000 | } | |
1001 | if (pending_map.strategy != MonMap::DISALLOW && | |
1002 | pending_map.strategy != MonMap::CONNECTIVITY) { | |
1003 | ss << "You cannot disallow monitors in your current election mode"; | |
1004 | err = -EINVAL; | |
1005 | goto reply; | |
1006 | } | |
1007 | if (!pending_map.contains(name)) { | |
1008 | ss << "mon." << name << " does not exist"; | |
1009 | err = -ENOENT; | |
1010 | goto reply; | |
1011 | } | |
1012 | if (!pending_map.disallowed_leaders.count(name)) { | |
1013 | ss << "mon." << name << " is already allowed"; | |
1014 | err = 0; | |
1015 | goto reply; | |
1016 | } | |
1017 | pending_map.disallowed_leaders.erase(name); | |
a4b75251 | 1018 | pending_map.last_changed = ceph_clock_now(); |
f67539c2 TL |
1019 | err = 0; |
1020 | propose = true; | |
1021 | } else if (prefix == "mon set_location") { | |
1022 | if (!mon.get_quorum_mon_features().contains_all( | |
1023 | ceph::features::mon::FEATURE_PINGING)) { | |
1024 | err = -ENOTSUP; | |
1025 | ss << "Not all monitors support monitor locations; please upgrade first!"; | |
1026 | goto reply; | |
1027 | } | |
1028 | string name; | |
1029 | if (!cmd_getval(cmdmap, "name", name)) { | |
1030 | err = -EINVAL; | |
1031 | goto reply; | |
1032 | } | |
1033 | if (!pending_map.contains(name)) { | |
1034 | ss << "mon." << name << " does not exist"; | |
1035 | err = -ENOENT; | |
1036 | goto reply; | |
1037 | } | |
1038 | ||
f67539c2 TL |
1039 | vector<string> argvec; |
1040 | map<string, string> loc; | |
1041 | cmd_getval(cmdmap, "args", argvec); | |
1042 | CrushWrapper::parse_loc_map(argvec, &loc); | |
1043 | ||
1044 | dout(10) << "mon set_location for " << name << " to " << loc << dendl; | |
1045 | ||
1046 | // TODO: validate location in crush map | |
1047 | if (!loc.size()) { | |
1048 | ss << "We could not parse your input location to anything real; " << argvec | |
1049 | << " turned into an empty map!"; | |
1050 | err = -EINVAL; | |
1051 | goto reply; | |
1052 | } | |
1053 | // TODO: validate location against any existing stretch config | |
1054 | pending_map.mon_info[name].crush_loc = loc; | |
a4b75251 TL |
1055 | pending_map.last_changed = ceph_clock_now(); |
1056 | err = 0; | |
1057 | propose = true; | |
1058 | } else if (prefix == "mon set_new_tiebreaker") { | |
1059 | if (!pending_map.stretch_mode_enabled) { | |
1060 | err = -EINVAL; | |
1061 | ss << "Stretch mode is not enabled, so there is no tiebreaker"; | |
1062 | goto reply; | |
1063 | } | |
1064 | string name; | |
1065 | if (!cmd_getval(cmdmap, "name", name)) { | |
1066 | err = -EINVAL; | |
1067 | goto reply; | |
1068 | } | |
1069 | bool sure = false; | |
1070 | cmd_getval(cmdmap, "yes_i_really_mean_it", sure); | |
1071 | ||
1072 | const auto &existing_tiebreaker_info_i = pending_map.mon_info.find(pending_map.tiebreaker_mon); | |
1073 | const auto &new_tiebreaker_info_i = pending_map.mon_info.find(name); | |
1074 | if (new_tiebreaker_info_i == pending_map.mon_info.end()) { | |
1075 | ss << "mon." << name << " does not exist"; | |
1076 | err = -ENOENT; | |
1077 | goto reply; | |
1078 | } | |
1079 | const auto& new_info = new_tiebreaker_info_i->second; | |
1080 | if (new_info.crush_loc.empty()) { | |
1081 | ss << "mon." << name << " does not have a location specified"; | |
1082 | err = -EINVAL; | |
1083 | goto reply; | |
1084 | } | |
1085 | ||
1086 | if (!mon.osdmon()->is_readable()) { | |
1087 | dout(10) << __func__ | |
1088 | << ": waiting for osdmon readable to inspect crush barrier" | |
1089 | << dendl; | |
1090 | mon.osdmon()->wait_for_readable(op, new Monitor::C_RetryMessage(&mon, op)); | |
1091 | return false; | |
1092 | } | |
1093 | int32_t stretch_divider_id = mon.osdmon()->osdmap.stretch_mode_bucket; | |
1094 | string stretch_bucket_divider = mon.osdmon()->osdmap.crush-> | |
1095 | get_type_name(stretch_divider_id); | |
1096 | ||
1097 | const auto& new_loc_i = new_info.crush_loc.find(stretch_bucket_divider); | |
1098 | if (new_loc_i == new_info.crush_loc.end()) { | |
1099 | ss << "mon." << name << " has a specificed location, but not a " | |
1100 | << stretch_bucket_divider << ", which is the stretch divider"; | |
1101 | err = -EINVAL; | |
1102 | goto reply; | |
1103 | } | |
1104 | const string& new_loc = new_loc_i->second; | |
1105 | set<string> matching_mons; | |
1106 | for (const auto& mii : pending_map.mon_info) { | |
1107 | const auto& other_loc_i = mii.second.crush_loc.find(stretch_bucket_divider); | |
1108 | if (mii.first == name) { | |
1109 | continue; | |
1110 | } | |
1111 | if (other_loc_i == mii.second.crush_loc.end()) { // huh | |
1112 | continue; | |
1113 | } | |
1114 | const string& other_loc = other_loc_i->second; | |
1115 | if (other_loc == new_loc && | |
1116 | mii.first != existing_tiebreaker_info_i->first) { | |
1117 | matching_mons.insert(mii.first); | |
1118 | } | |
1119 | } | |
1120 | if (!matching_mons.empty()) { | |
1121 | ss << "mon." << name << " has location " << new_loc_i->second | |
1122 | << ", which matches mons " << matching_mons << " on the " | |
1123 | << stretch_bucket_divider << " dividing bucket for stretch mode. " | |
1124 | "Pass --yes-i-really-mean-it if you're sure you want to do this." | |
1125 | "(You really don't.)"; | |
1126 | err = -EINVAL; | |
1127 | goto reply; | |
1128 | } | |
1129 | pending_map.tiebreaker_mon = name; | |
1130 | pending_map.disallowed_leaders.insert(name); | |
1131 | pending_map.last_changed = ceph_clock_now(); | |
f67539c2 TL |
1132 | err = 0; |
1133 | propose = true; | |
1134 | } else if (prefix == "mon enable_stretch_mode") { | |
1135 | if (!mon.osdmon()->is_writeable()) { | |
a4b75251 | 1136 | dout(10) << __func__ |
f67539c2 TL |
1137 | << ": waiting for osdmon writeable for stretch mode" << dendl; |
1138 | mon.osdmon()->wait_for_writeable(op, new Monitor::C_RetryMessage(&mon, op)); | |
1139 | return false; | |
1140 | } | |
1141 | { | |
1142 | if (monmap.stretch_mode_enabled) { | |
1143 | ss << "stretch mode is already engaged"; | |
1144 | err = -EINVAL; | |
1145 | goto reply; | |
1146 | } | |
1147 | if (pending_map.stretch_mode_enabled) { | |
1148 | ss << "stretch mode currently committing"; | |
1149 | err = 0; | |
1150 | goto reply; | |
1151 | } | |
1152 | string tiebreaker_mon; | |
1153 | if (!cmd_getval(cmdmap, "tiebreaker_mon", tiebreaker_mon)) { | |
1154 | ss << "must specify a tiebreaker monitor"; | |
1155 | err = -EINVAL; | |
1156 | goto reply; | |
1157 | } | |
1158 | string new_crush_rule; | |
1159 | if (!cmd_getval(cmdmap, "new_crush_rule", new_crush_rule)) { | |
1160 | ss << "must specify a new crush rule that spreads out copies over multiple sites"; | |
1161 | err = -EINVAL; | |
1162 | goto reply; | |
1163 | } | |
1164 | string dividing_bucket; | |
1165 | if (!cmd_getval(cmdmap, "dividing_bucket", dividing_bucket)) { | |
1166 | ss << "must specify a dividing bucket"; | |
1167 | err = -EINVAL; | |
1168 | goto reply; | |
1169 | } | |
1170 | //okay, initial arguments make sense, check pools and cluster state | |
1171 | err = mon.osdmon()->check_cluster_features(CEPH_FEATUREMASK_STRETCH_MODE, ss); | |
1172 | if (err) | |
1173 | goto reply; | |
1174 | struct Plugger { | |
1175 | Paxos &p; | |
1176 | Plugger(Paxos &p) : p(p) { p.plug(); } | |
1177 | ~Plugger() { p.unplug(); } | |
1178 | } plugger(paxos); | |
1179 | ||
1180 | set<pg_pool_t*> pools; | |
1181 | bool okay = false; | |
1182 | int errcode = 0; | |
1183 | ||
1184 | mon.osdmon()->try_enable_stretch_mode_pools(ss, &okay, &errcode, | |
1185 | &pools, new_crush_rule); | |
1186 | if (!okay) { | |
1187 | err = errcode; | |
1188 | goto reply; | |
1189 | } | |
1190 | try_enable_stretch_mode(ss, &okay, &errcode, false, | |
1191 | tiebreaker_mon, dividing_bucket); | |
1192 | if (!okay) { | |
1193 | err = errcode; | |
1194 | goto reply; | |
1195 | } | |
1196 | mon.osdmon()->try_enable_stretch_mode(ss, &okay, &errcode, false, | |
1197 | dividing_bucket, 2, pools, new_crush_rule); | |
1198 | if (!okay) { | |
1199 | err = errcode; | |
1200 | goto reply; | |
1201 | } | |
1202 | // everything looks good, actually commit the changes! | |
1203 | try_enable_stretch_mode(ss, &okay, &errcode, true, | |
1204 | tiebreaker_mon, dividing_bucket); | |
1205 | mon.osdmon()->try_enable_stretch_mode(ss, &okay, &errcode, true, | |
1206 | dividing_bucket, | |
1207 | 2, // right now we only support 2 sites | |
1208 | pools, new_crush_rule); | |
1209 | ceph_assert(okay == true); | |
1210 | } | |
1211 | request_proposal(mon.osdmon()); | |
1212 | err = 0; | |
1213 | propose = true; | |
7c673cae FG |
1214 | } else { |
1215 | ss << "unknown command " << prefix; | |
1216 | err = -EINVAL; | |
1217 | } | |
1218 | ||
1219 | reply: | |
1220 | getline(ss, rs); | |
f67539c2 | 1221 | mon.reply_command(op, err, rs, get_last_committed()); |
7c673cae FG |
1222 | // we are returning to the user; do not propose. |
1223 | return propose; | |
1224 | } | |
1225 | ||
f67539c2 TL |
1226 | void MonmapMonitor::try_enable_stretch_mode(stringstream& ss, bool *okay, |
1227 | int *errcode, bool commit, | |
1228 | const string& tiebreaker_mon, | |
1229 | const string& dividing_bucket) | |
1230 | { | |
1231 | dout(20) << __func__ << dendl; | |
1232 | *okay = false; | |
1233 | if (pending_map.strategy != MonMap::CONNECTIVITY) { | |
1234 | ss << "Monitors must use the connectivity strategy to enable stretch mode"; | |
1235 | *errcode = -EINVAL; | |
1236 | ceph_assert(!commit); | |
1237 | return; | |
1238 | } | |
1239 | if (!pending_map.contains(tiebreaker_mon)) { | |
1240 | ss << "mon " << tiebreaker_mon << "does not seem to exist"; | |
1241 | *errcode = -ENOENT; | |
1242 | ceph_assert(!commit); | |
1243 | return; | |
1244 | } | |
1245 | map<string,string> buckets; | |
1246 | for (const auto&mii : mon.monmap->mon_info) { | |
1247 | const auto& mi = mii.second; | |
1248 | const auto& bi = mi.crush_loc.find(dividing_bucket); | |
1249 | if (bi == mi.crush_loc.end()) { | |
1250 | ss << "Could not find location entry for " << dividing_bucket | |
1251 | << " on monitor " << mi.name; | |
1252 | *errcode = -EINVAL; | |
1253 | ceph_assert(!commit); | |
1254 | return; | |
1255 | } | |
1256 | buckets[mii.first] = bi->second; | |
1257 | } | |
1258 | string bucket1, bucket2, tiebreaker_bucket; | |
1259 | for (auto& i : buckets) { | |
1260 | if (i.first == tiebreaker_mon) { | |
1261 | tiebreaker_bucket = i.second; | |
1262 | continue; | |
1263 | } | |
1264 | if (bucket1.empty()) { | |
1265 | bucket1 = i.second; | |
1266 | } | |
1267 | if (bucket1 != i.second && | |
1268 | bucket2.empty()) { | |
1269 | bucket2 = i.second; | |
1270 | } | |
1271 | if (bucket1 != i.second && | |
1272 | bucket2 != i.second) { | |
1273 | ss << "There are too many monitor buckets for stretch mode, found " | |
1274 | << bucket1 << "," << bucket2 << "," << i.second; | |
1275 | *errcode = -EINVAL; | |
1276 | ceph_assert(!commit); | |
1277 | return; | |
1278 | } | |
1279 | } | |
1280 | if (bucket1.empty() || bucket2.empty()) { | |
1281 | ss << "There are not enough monitor buckets for stretch mode;" | |
1282 | << " must have at least 2 plus the tiebreaker but only found " | |
1283 | << (bucket1.empty() ? bucket1 : bucket2); | |
1284 | *errcode = -EINVAL; | |
1285 | ceph_assert(!commit); | |
1286 | return; | |
1287 | } | |
1288 | if (tiebreaker_bucket == bucket1 || | |
1289 | tiebreaker_bucket == bucket2) { | |
1290 | ss << "The named tiebreaker monitor " << tiebreaker_mon | |
1291 | << " is in the same CRUSH bucket " << tiebreaker_bucket | |
1292 | << " as other monitors"; | |
1293 | *errcode = -EINVAL; | |
1294 | ceph_assert(!commit); | |
1295 | return; | |
1296 | } | |
1297 | if (commit) { | |
1298 | pending_map.disallowed_leaders.insert(tiebreaker_mon); | |
1299 | pending_map.tiebreaker_mon = tiebreaker_mon; | |
1300 | pending_map.stretch_mode_enabled = true; | |
1301 | } | |
1302 | *okay = true; | |
1303 | } | |
1304 | ||
1305 | void MonmapMonitor::trigger_degraded_stretch_mode(const set<string>& dead_mons) | |
1306 | { | |
1307 | dout(20) << __func__ << dendl; | |
1308 | pending_map.stretch_marked_down_mons.insert(dead_mons.begin(), dead_mons.end()); | |
1309 | propose_pending(); | |
1310 | } | |
1311 | ||
1312 | void MonmapMonitor::trigger_healthy_stretch_mode() | |
1313 | { | |
1314 | dout(20) << __func__ << dendl; | |
1315 | pending_map.stretch_marked_down_mons.clear(); | |
1316 | propose_pending(); | |
1317 | } | |
1318 | ||
7c673cae FG |
1319 | bool MonmapMonitor::preprocess_join(MonOpRequestRef op) |
1320 | { | |
9f95a23c | 1321 | auto join = op->get_req<MMonJoin>(); |
11fdf7f2 | 1322 | dout(10) << __func__ << " " << join->name << " at " << join->addrs << dendl; |
7c673cae | 1323 | |
11fdf7f2 | 1324 | MonSession *session = op->get_session(); |
7c673cae FG |
1325 | if (!session || |
1326 | !session->is_capable("mon", MON_CAP_W | MON_CAP_X)) { | |
1327 | dout(10) << " insufficient caps" << dendl; | |
1328 | return true; | |
1329 | } | |
1330 | ||
b3b6e05e TL |
1331 | const auto name_info_i = pending_map.mon_info.find(join->name); |
1332 | if (name_info_i != pending_map.mon_info.end() && | |
1333 | !name_info_i->second.public_addrs.front().is_blank_ip() && | |
1334 | (!join->force_loc || join->crush_loc == name_info_i->second.crush_loc)) { | |
7c673cae FG |
1335 | dout(10) << " already have " << join->name << dendl; |
1336 | return true; | |
1337 | } | |
b3b6e05e TL |
1338 | string addr_name; |
1339 | if (pending_map.contains(join->addrs)) { | |
1340 | addr_name = pending_map.get_name(join->addrs); | |
1341 | } | |
1342 | if (!addr_name.empty() && | |
1343 | addr_name == join->name && | |
1344 | (!join->force_loc || join->crush_loc.empty() || | |
1345 | pending_map.mon_info[addr_name].crush_loc == join->crush_loc)) { | |
11fdf7f2 | 1346 | dout(10) << " already have " << join->addrs << dendl; |
7c673cae FG |
1347 | return true; |
1348 | } | |
b3b6e05e TL |
1349 | if (pending_map.stretch_mode_enabled && |
1350 | join->crush_loc.empty() && | |
1351 | (addr_name.empty() || | |
1352 | pending_map.mon_info[addr_name].crush_loc.empty())) { | |
1353 | dout(10) << "stretch mode engaged but no source of crush_loc" << dendl; | |
1354 | mon.clog->info() << join->name << " attempted to join from " << join->name | |
1355 | << ' ' << join->addrs | |
1356 | << "; but lacks a crush_location for stretch mode"; | |
1357 | return true; | |
1358 | } | |
7c673cae FG |
1359 | return false; |
1360 | } | |
b3b6e05e | 1361 | |
7c673cae FG |
1362 | bool MonmapMonitor::prepare_join(MonOpRequestRef op) |
1363 | { | |
9f95a23c | 1364 | auto join = op->get_req<MMonJoin>(); |
11fdf7f2 TL |
1365 | dout(0) << "adding/updating " << join->name |
1366 | << " at " << join->addrs << " to monitor cluster" << dendl; | |
f67539c2 TL |
1367 | map<string,string> existing_loc; |
1368 | if (pending_map.contains(join->addrs)) { | |
1369 | string name = pending_map.get_name(join->addrs); | |
1370 | existing_loc = pending_map.mon_info[name].crush_loc; | |
1371 | pending_map.remove(name); | |
1372 | } | |
7c673cae FG |
1373 | if (pending_map.contains(join->name)) |
1374 | pending_map.remove(join->name); | |
11fdf7f2 | 1375 | pending_map.add(join->name, join->addrs); |
b3b6e05e TL |
1376 | pending_map.mon_info[join->name].crush_loc = |
1377 | ((join->force_loc || existing_loc.empty()) ? | |
1378 | join->crush_loc : existing_loc); | |
7c673cae FG |
1379 | pending_map.last_changed = ceph_clock_now(); |
1380 | return true; | |
1381 | } | |
1382 | ||
1383 | bool MonmapMonitor::should_propose(double& delay) | |
1384 | { | |
1385 | delay = 0.0; | |
1386 | return true; | |
1387 | } | |
1388 | ||
7c673cae FG |
1389 | int MonmapMonitor::get_monmap(bufferlist &bl) |
1390 | { | |
1391 | version_t latest_ver = get_last_committed(); | |
1392 | dout(10) << __func__ << " ver " << latest_ver << dendl; | |
1393 | ||
f67539c2 | 1394 | if (!mon.store->exists(get_service_name(), stringify(latest_ver))) |
7c673cae FG |
1395 | return -ENOENT; |
1396 | ||
1397 | int err = get_version(latest_ver, bl); | |
1398 | if (err < 0) { | |
1399 | dout(1) << __func__ << " error obtaining monmap: " | |
1400 | << cpp_strerror(err) << dendl; | |
1401 | return err; | |
1402 | } | |
1403 | return 0; | |
1404 | } | |
1405 | ||
1406 | void MonmapMonitor::check_subs() | |
1407 | { | |
1408 | const string type = "monmap"; | |
f67539c2 | 1409 | mon.with_session_map([this, &type](const MonSessionMap& session_map) { |
7c673cae FG |
1410 | auto subs = session_map.subs.find(type); |
1411 | if (subs == session_map.subs.end()) | |
1412 | return; | |
1413 | for (auto sub : *subs->second) { | |
1414 | check_sub(sub); | |
1415 | } | |
1416 | }); | |
1417 | } | |
1418 | ||
1419 | void MonmapMonitor::check_sub(Subscription *sub) | |
1420 | { | |
f67539c2 | 1421 | const auto epoch = mon.monmap->get_epoch(); |
7c673cae FG |
1422 | dout(10) << __func__ |
1423 | << " monmap next " << sub->next | |
1424 | << " have " << epoch << dendl; | |
1425 | if (sub->next <= epoch) { | |
f67539c2 | 1426 | mon.send_latest_monmap(sub->session->con.get()); |
7c673cae | 1427 | if (sub->onetime) { |
f67539c2 | 1428 | mon.with_session_map([sub](MonSessionMap& session_map) { |
7c673cae FG |
1429 | session_map.remove_sub(sub); |
1430 | }); | |
1431 | } else { | |
1432 | sub->next = epoch + 1; | |
1433 | } | |
1434 | } | |
1435 | } | |
11fdf7f2 TL |
1436 | |
1437 | void MonmapMonitor::tick() | |
1438 | { | |
1439 | if (!is_active() || | |
f67539c2 | 1440 | !mon.is_leader()) { |
11fdf7f2 TL |
1441 | return; |
1442 | } | |
1443 | ||
f67539c2 | 1444 | if (mon.monmap->created.is_zero()) { |
11fdf7f2 TL |
1445 | dout(10) << __func__ << " detected empty created stamp" << dendl; |
1446 | utime_t ctime; | |
1447 | for (version_t v = 1; v <= get_last_committed(); v++) { | |
1448 | bufferlist bl; | |
1449 | int r = get_version(v, bl); | |
1450 | if (r < 0) { | |
1451 | continue; | |
1452 | } | |
1453 | MonMap m; | |
1454 | auto p = bl.cbegin(); | |
1455 | decode(m, p); | |
1456 | if (!m.last_changed.is_zero()) { | |
1457 | dout(10) << __func__ << " first monmap with last_changed is " | |
1458 | << v << " with " << m.last_changed << dendl; | |
1459 | ctime = m.last_changed; | |
1460 | break; | |
1461 | } | |
1462 | } | |
1463 | if (ctime.is_zero()) { | |
1464 | ctime = ceph_clock_now(); | |
1465 | } | |
1466 | dout(10) << __func__ << " updating created stamp to " << ctime << dendl; | |
1467 | pending_map.created = ctime; | |
1468 | propose_pending(); | |
1469 | } | |
1470 | } |