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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); | |
2a845540 TL |
251 | |
252 | mon.update_pending_metadata(); | |
7c673cae FG |
253 | } |
254 | ||
255 | bool MonmapMonitor::preprocess_query(MonOpRequestRef op) | |
256 | { | |
9f95a23c | 257 | auto m = op->get_req<PaxosServiceMessage>(); |
7c673cae FG |
258 | switch (m->get_type()) { |
259 | // READs | |
260 | case MSG_MON_COMMAND: | |
f64942e4 AA |
261 | try { |
262 | return preprocess_command(op); | |
263 | } | |
264 | catch (const bad_cmd_get& e) { | |
265 | bufferlist bl; | |
f67539c2 | 266 | mon.reply_command(op, -EINVAL, e.what(), bl, get_last_committed()); |
f64942e4 AA |
267 | return true; |
268 | } | |
7c673cae FG |
269 | case MSG_MON_JOIN: |
270 | return preprocess_join(op); | |
271 | default: | |
272 | ceph_abort(); | |
273 | return true; | |
274 | } | |
275 | } | |
276 | ||
277 | void MonmapMonitor::dump_info(Formatter *f) | |
278 | { | |
279 | f->dump_unsigned("monmap_first_committed", get_first_committed()); | |
280 | f->dump_unsigned("monmap_last_committed", get_last_committed()); | |
281 | f->open_object_section("monmap"); | |
f67539c2 | 282 | mon.monmap->dump(f); |
7c673cae FG |
283 | f->close_section(); |
284 | f->open_array_section("quorum"); | |
f67539c2 | 285 | for (set<int>::iterator q = mon.get_quorum().begin(); q != mon.get_quorum().end(); ++q) |
7c673cae FG |
286 | f->dump_int("mon", *q); |
287 | f->close_section(); | |
288 | } | |
289 | ||
290 | bool MonmapMonitor::preprocess_command(MonOpRequestRef op) | |
291 | { | |
9f95a23c | 292 | auto m = op->get_req<MMonCommand>(); |
7c673cae FG |
293 | int r = -1; |
294 | bufferlist rdata; | |
295 | stringstream ss; | |
296 | ||
11fdf7f2 | 297 | cmdmap_t cmdmap; |
7c673cae FG |
298 | if (!cmdmap_from_json(m->cmd, &cmdmap, ss)) { |
299 | string rs = ss.str(); | |
f67539c2 | 300 | mon.reply_command(op, -EINVAL, rs, rdata, get_last_committed()); |
7c673cae FG |
301 | return true; |
302 | } | |
303 | ||
304 | string prefix; | |
9f95a23c | 305 | cmd_getval(cmdmap, "prefix", prefix); |
7c673cae | 306 | |
11fdf7f2 | 307 | MonSession *session = op->get_session(); |
7c673cae | 308 | if (!session) { |
f67539c2 | 309 | mon.reply_command(op, -EACCES, "access denied", get_last_committed()); |
7c673cae FG |
310 | return true; |
311 | } | |
312 | ||
20effc67 | 313 | string format = cmd_getval_or<string>(cmdmap, "format", "plain"); |
7c673cae FG |
314 | boost::scoped_ptr<Formatter> f(Formatter::create(format)); |
315 | ||
316 | if (prefix == "mon stat") { | |
f91f0fd5 TL |
317 | if (f) { |
318 | f->open_object_section("monmap"); | |
f67539c2 TL |
319 | mon.monmap->dump_summary(f.get()); |
320 | f->dump_string("leader", mon.get_leader_name()); | |
f91f0fd5 | 321 | f->open_array_section("quorum"); |
f67539c2 TL |
322 | for (auto rank: mon.get_quorum()) { |
323 | std::string name = mon.monmap->get_name(rank); | |
f91f0fd5 TL |
324 | f->open_object_section("mon"); |
325 | f->dump_int("rank", rank); | |
326 | f->dump_string("name", name); | |
327 | f->close_section(); // mon | |
328 | } | |
329 | f->close_section(); // quorum | |
330 | f->close_section(); // monmap | |
331 | f->flush(ss); | |
332 | } else { | |
f67539c2 TL |
333 | mon.monmap->print_summary(ss); |
334 | ss << ", election epoch " << mon.get_epoch() << ", leader " | |
335 | << mon.get_leader() << " " << mon.get_leader_name() | |
336 | << ", quorum " << mon.get_quorum() | |
337 | << " " << mon.get_quorum_names(); | |
f91f0fd5 TL |
338 | } |
339 | ||
7c673cae FG |
340 | rdata.append(ss); |
341 | ss.str(""); | |
342 | r = 0; | |
343 | ||
344 | } else if (prefix == "mon getmap" || | |
345 | prefix == "mon dump") { | |
346 | ||
347 | epoch_t epoch; | |
20effc67 | 348 | int64_t epochnum = cmd_getval_or<int64_t>(cmdmap, "epoch", 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; | |
20effc67 | 400 | cmd_getval_compat_cephbool(cmdmap, "with_value", list_with_value); |
7c673cae | 401 | |
f67539c2 | 402 | MonMap *p = mon.monmap; |
7c673cae FG |
403 | |
404 | // list features | |
405 | mon_feature_t supported = ceph::features::mon::get_supported(); | |
406 | mon_feature_t persistent = ceph::features::mon::get_persistent(); | |
407 | mon_feature_t required = p->get_required_features(); | |
408 | ||
409 | stringstream ds; | |
410 | auto print_feature = [&](mon_feature_t& m_features, const char* m_str) { | |
411 | if (f) { | |
412 | if (list_with_value) | |
413 | m_features.dump_with_value(f.get(), m_str); | |
414 | else | |
415 | m_features.dump(f.get(), m_str); | |
416 | } else { | |
417 | if (list_with_value) | |
418 | m_features.print_with_value(ds); | |
419 | else | |
420 | m_features.print(ds); | |
421 | } | |
422 | }; | |
423 | ||
424 | if (f) { | |
425 | f->open_object_section("features"); | |
426 | ||
427 | f->open_object_section("all"); | |
428 | print_feature(supported, "supported"); | |
429 | print_feature(persistent, "persistent"); | |
430 | f->close_section(); // all | |
431 | ||
432 | f->open_object_section("monmap"); | |
433 | print_feature(p->persistent_features, "persistent"); | |
434 | print_feature(p->optional_features, "optional"); | |
435 | print_feature(required, "required"); | |
436 | f->close_section(); // monmap | |
437 | ||
438 | f->close_section(); // features | |
439 | f->flush(ds); | |
440 | ||
441 | } else { | |
442 | ds << "all features" << std::endl | |
443 | << "\tsupported: "; | |
444 | print_feature(supported, nullptr); | |
445 | ds << std::endl | |
446 | << "\tpersistent: "; | |
447 | print_feature(persistent, nullptr); | |
448 | ds << std::endl | |
449 | << std::endl; | |
450 | ||
451 | ds << "on current monmap (epoch " | |
452 | << p->get_epoch() << ")" << std::endl | |
453 | << "\tpersistent: "; | |
454 | print_feature(p->persistent_features, nullptr); | |
455 | ds << std::endl | |
456 | // omit optional features in plain-text | |
457 | // makes it easier to read, and they're, currently, empty. | |
458 | << "\trequired: "; | |
459 | print_feature(required, nullptr); | |
460 | ds << std::endl; | |
461 | } | |
462 | rdata.append(ds); | |
463 | r = 0; | |
464 | } | |
465 | ||
466 | reply: | |
467 | if (r != -1) { | |
468 | string rs; | |
469 | getline(ss, rs); | |
470 | ||
f67539c2 | 471 | mon.reply_command(op, r, rs, rdata, get_last_committed()); |
7c673cae FG |
472 | return true; |
473 | } else | |
474 | return false; | |
475 | } | |
476 | ||
477 | ||
478 | bool MonmapMonitor::prepare_update(MonOpRequestRef op) | |
479 | { | |
9f95a23c | 480 | auto m = op->get_req<PaxosServiceMessage>(); |
224ce89b | 481 | dout(7) << __func__ << " " << *m << " from " << m->get_orig_source_inst() << dendl; |
7c673cae FG |
482 | |
483 | switch (m->get_type()) { | |
484 | case MSG_MON_COMMAND: | |
f64942e4 AA |
485 | try { |
486 | return prepare_command(op); | |
11fdf7f2 | 487 | } catch (const bad_cmd_get& e) { |
f64942e4 | 488 | bufferlist bl; |
f67539c2 | 489 | mon.reply_command(op, -EINVAL, e.what(), bl, get_last_committed()); |
f64942e4 AA |
490 | return true; |
491 | } | |
7c673cae FG |
492 | case MSG_MON_JOIN: |
493 | return prepare_join(op); | |
494 | default: | |
495 | ceph_abort(); | |
496 | } | |
497 | ||
498 | return false; | |
499 | } | |
500 | ||
501 | bool MonmapMonitor::prepare_command(MonOpRequestRef op) | |
502 | { | |
9f95a23c | 503 | auto m = op->get_req<MMonCommand>(); |
7c673cae FG |
504 | stringstream ss; |
505 | string rs; | |
506 | int err = -EINVAL; | |
507 | ||
11fdf7f2 | 508 | cmdmap_t cmdmap; |
7c673cae FG |
509 | if (!cmdmap_from_json(m->cmd, &cmdmap, ss)) { |
510 | string rs = ss.str(); | |
f67539c2 | 511 | mon.reply_command(op, -EINVAL, rs, get_last_committed()); |
7c673cae FG |
512 | return true; |
513 | } | |
514 | ||
515 | string prefix; | |
9f95a23c | 516 | cmd_getval(cmdmap, "prefix", prefix); |
7c673cae | 517 | |
11fdf7f2 | 518 | MonSession *session = op->get_session(); |
7c673cae | 519 | if (!session) { |
f67539c2 | 520 | mon.reply_command(op, -EACCES, "access denied", get_last_committed()); |
7c673cae FG |
521 | return true; |
522 | } | |
523 | ||
524 | /* We should follow the following rules: | |
525 | * | |
526 | * - 'monmap' is the current, consistent version of the monmap | |
527 | * - 'pending_map' is the uncommitted version of the monmap | |
528 | * | |
529 | * All checks for the current state must be made against 'monmap'. | |
530 | * All changes are made against 'pending_map'. | |
531 | * | |
532 | * If there are concurrent operations modifying 'pending_map', please | |
533 | * follow the following rules. | |
534 | * | |
535 | * - if pending_map has already been changed, the second operation must | |
536 | * wait for the proposal to finish and be run again; This is the easiest | |
537 | * path to guarantee correctness but may impact performance (i.e., it | |
538 | * will take longer for the user to get a reply). | |
539 | * | |
540 | * - if the result of the second operation can be guaranteed to be | |
541 | * idempotent, the operation may reply to the user once the proposal | |
542 | * finishes; still needs to wait for the proposal to finish. | |
543 | * | |
544 | * - An operation _NEVER_ returns to the user based on pending state. | |
545 | * | |
546 | * If an operation does not modify current stable monmap, it may be | |
547 | * serialized before current pending map, regardless of any change that | |
548 | * has been made to the pending map -- remember, pending is uncommitted | |
549 | * state, thus we are not bound by it. | |
550 | */ | |
551 | ||
f67539c2 TL |
552 | ceph_assert(mon.monmap); |
553 | MonMap &monmap = *mon.monmap; | |
7c673cae FG |
554 | |
555 | ||
556 | /* Please note: | |
557 | * | |
558 | * Adding or removing monitors may lead to loss of quorum. | |
559 | * | |
560 | * Because quorum may be lost, it's important to reply something | |
561 | * to the user, lest she end up waiting forever for a reply. And | |
562 | * no reply will ever be sent until quorum is formed again. | |
563 | * | |
564 | * On the other hand, this means we're leaking uncommitted state | |
565 | * to the user. As such, please be mindful of the reply message. | |
566 | * | |
567 | * e.g., 'adding monitor mon.foo' is okay ('adding' is an on-going | |
568 | * operation and conveys its not-yet-permanent nature); whereas | |
569 | * 'added monitor mon.foo' presumes the action has successfully | |
570 | * completed and state has been committed, which may not be true. | |
571 | */ | |
572 | ||
573 | ||
574 | bool propose = false; | |
575 | if (prefix == "mon add") { | |
576 | string name; | |
9f95a23c | 577 | cmd_getval(cmdmap, "name", name); |
7c673cae | 578 | string addrstr; |
9f95a23c | 579 | cmd_getval(cmdmap, "addr", addrstr); |
7c673cae FG |
580 | entity_addr_t addr; |
581 | bufferlist rdata; | |
582 | ||
20effc67 | 583 | if (!addr.parse(addrstr)) { |
7c673cae FG |
584 | err = -EINVAL; |
585 | ss << "addr " << addrstr << "does not parse"; | |
586 | goto reply; | |
587 | } | |
588 | ||
f67539c2 TL |
589 | vector<string> locationvec; |
590 | map<string, string> loc; | |
591 | cmd_getval(cmdmap, "location", locationvec); | |
592 | CrushWrapper::parse_loc_map(locationvec, &loc); | |
593 | if (locationvec.size() && | |
594 | !mon.get_quorum_mon_features().contains_all( | |
595 | ceph::features::mon::FEATURE_PINGING)) { | |
596 | err = -ENOTSUP; | |
597 | ss << "Not all monitors support adding monitors with a location; please upgrade first!"; | |
598 | goto reply; | |
599 | } | |
600 | if (locationvec.size() && !loc.size()) { | |
601 | ss << "We could not parse your input location to anything real; " << locationvec | |
602 | << " turned into an empty map!"; | |
603 | err = -EINVAL; | |
604 | goto reply; | |
605 | } | |
606 | ||
607 | dout(10) << "mon add setting location for " << name << " to " << loc << dendl; | |
608 | ||
609 | // TODO: validate location in crush map | |
610 | if (monmap.stretch_mode_enabled && !loc.size()) { | |
611 | ss << "We are in stretch mode and new monitors must have a location, but " | |
612 | << "could not parse your input location to anything real; " << locationvec | |
613 | << " turned into an empty map!"; | |
614 | err = -EINVAL; | |
615 | goto reply; | |
616 | } | |
617 | // TODO: validate location against any existing stretch config | |
618 | ||
11fdf7f2 TL |
619 | entity_addrvec_t addrs; |
620 | if (monmap.persistent_features.contains_all( | |
621 | ceph::features::mon::FEATURE_NAUTILUS)) { | |
622 | if (addr.get_port() == CEPH_MON_PORT_IANA) { | |
623 | addr.set_type(entity_addr_t::TYPE_MSGR2); | |
624 | } | |
625 | if (addr.get_port() == CEPH_MON_PORT_LEGACY) { | |
626 | // if they specified the *old* default they probably don't care | |
627 | addr.set_port(0); | |
628 | } | |
629 | if (addr.get_port()) { | |
630 | addrs.v.push_back(addr); | |
631 | } else { | |
632 | addr.set_type(entity_addr_t::TYPE_MSGR2); | |
633 | addr.set_port(CEPH_MON_PORT_IANA); | |
634 | addrs.v.push_back(addr); | |
635 | addr.set_type(entity_addr_t::TYPE_LEGACY); | |
636 | addr.set_port(CEPH_MON_PORT_LEGACY); | |
637 | addrs.v.push_back(addr); | |
638 | } | |
639 | } else { | |
640 | if (addr.get_port() == 0) { | |
641 | addr.set_port(CEPH_MON_PORT_LEGACY); | |
642 | } | |
643 | addr.set_type(entity_addr_t::TYPE_LEGACY); | |
644 | addrs.v.push_back(addr); | |
7c673cae | 645 | } |
11fdf7f2 | 646 | dout(20) << __func__ << " addr " << addr << " -> addrs " << addrs << dendl; |
7c673cae FG |
647 | |
648 | /** | |
649 | * If we have a monitor with the same name and different addr, then EEXIST | |
650 | * If we have a monitor with the same addr and different name, then EEXIST | |
651 | * If we have a monitor with the same addr and same name, then wait for | |
652 | * the proposal to finish and return success. | |
653 | * If we don't have the monitor, add it. | |
654 | */ | |
655 | ||
656 | err = 0; | |
657 | if (!ss.str().empty()) | |
658 | ss << "; "; | |
659 | ||
660 | do { | |
661 | if (monmap.contains(name)) { | |
11fdf7f2 | 662 | if (monmap.get_addrs(name) == addrs) { |
7c673cae FG |
663 | // stable map contains monitor with the same name at the same address. |
664 | // serialize before current pending map. | |
665 | err = 0; // for clarity; this has already been set above. | |
11fdf7f2 | 666 | ss << "mon." << name << " at " << addrs << " already exists"; |
7c673cae FG |
667 | goto reply; |
668 | } else { | |
669 | ss << "mon." << name | |
11fdf7f2 | 670 | << " already exists at address " << monmap.get_addrs(name); |
7c673cae | 671 | } |
11fdf7f2 | 672 | } else if (monmap.contains(addrs)) { |
7c673cae | 673 | // we established on the previous branch that name is different |
11fdf7f2 | 674 | ss << "mon." << monmap.get_name(addrs) |
7c673cae FG |
675 | << " already exists at address " << addr; |
676 | } else { | |
677 | // go ahead and add | |
678 | break; | |
679 | } | |
680 | err = -EEXIST; | |
681 | goto reply; | |
682 | } while (false); | |
683 | ||
f67539c2 TL |
684 | if (pending_map.stretch_mode_enabled) { |
685 | ||
686 | } | |
687 | ||
7c673cae FG |
688 | /* Given there's no delay between proposals on the MonmapMonitor (see |
689 | * MonmapMonitor::should_propose()), there is no point in checking for | |
690 | * a mismatch between name and addr on pending_map. | |
691 | * | |
692 | * Once we established the monitor does not exist in the committed state, | |
693 | * we can simply go ahead and add the monitor. | |
694 | */ | |
695 | ||
11fdf7f2 | 696 | pending_map.add(name, addrs); |
f67539c2 | 697 | pending_map.mon_info[name].crush_loc = loc; |
7c673cae | 698 | pending_map.last_changed = ceph_clock_now(); |
11fdf7f2 | 699 | ss << "adding mon." << name << " at " << addrs; |
7c673cae FG |
700 | propose = true; |
701 | dout(0) << __func__ << " proposing new mon." << name << dendl; | |
702 | ||
703 | } else if (prefix == "mon remove" || | |
704 | prefix == "mon rm") { | |
705 | string name; | |
9f95a23c | 706 | cmd_getval(cmdmap, "name", name); |
7c673cae FG |
707 | if (!monmap.contains(name)) { |
708 | err = 0; | |
709 | ss << "mon." << name << " does not exist or has already been removed"; | |
710 | goto reply; | |
711 | } | |
712 | ||
713 | if (monmap.size() == 1) { | |
714 | err = -EINVAL; | |
715 | ss << "error: refusing removal of last monitor " << name; | |
716 | goto reply; | |
717 | } | |
718 | ||
a4b75251 TL |
719 | if (pending_map.stretch_mode_enabled && |
720 | name == pending_map.tiebreaker_mon) { | |
721 | err = -EINVAL; | |
722 | ss << "you cannot remove stretch mode's tiebreaker monitor"; | |
723 | goto reply; | |
724 | } | |
7c673cae FG |
725 | /* At the time of writing, there is no risk of races when multiple clients |
726 | * attempt to use the same name. The reason is simple but may not be | |
727 | * obvious. | |
728 | * | |
729 | * In a nutshell, we do not collate proposals on the MonmapMonitor. As | |
730 | * soon as we return 'true' below, PaxosService::dispatch() will check if | |
731 | * the service should propose, and - if so - the service will be marked as | |
732 | * 'proposing' and a proposal will be triggered. The PaxosService class | |
733 | * guarantees that once a service is marked 'proposing' no further writes | |
734 | * will be handled. | |
735 | * | |
736 | * The decision on whether the service should propose or not is, in this | |
737 | * case, made by MonmapMonitor::should_propose(), which always considers | |
738 | * the proposal delay being 0.0 seconds. This is key for PaxosService to | |
739 | * trigger the proposal immediately. | |
740 | * 0.0 seconds of delay. | |
741 | * | |
742 | * From the above, there's no point in performing further checks on the | |
743 | * pending_map, as we don't ever have multiple proposals in-flight in | |
744 | * this service. As we've established the committed state contains the | |
745 | * monitor, we can simply go ahead and remove it. | |
746 | * | |
747 | * Please note that the code hinges on all of the above to be true. It | |
748 | * has been true since time immemorial and we don't see a good reason | |
749 | * to make it sturdier at this time - mainly because we don't think it's | |
750 | * going to change any time soon, lest for any bug that may be unwillingly | |
751 | * introduced. | |
752 | */ | |
753 | ||
11fdf7f2 | 754 | entity_addrvec_t addrs = pending_map.get_addrs(name); |
7c673cae | 755 | pending_map.remove(name); |
a4b75251 | 756 | pending_map.disallowed_leaders.erase(name); |
7c673cae | 757 | pending_map.last_changed = ceph_clock_now(); |
11fdf7f2 | 758 | ss << "removing mon." << name << " at " << addrs |
7c673cae FG |
759 | << ", there will be " << pending_map.size() << " monitors" ; |
760 | propose = true; | |
761 | err = 0; | |
762 | ||
763 | } else if (prefix == "mon feature set") { | |
764 | ||
765 | /* PLEASE NOTE: | |
766 | * | |
767 | * We currently only support setting/unsetting persistent features. | |
768 | * This is by design, given at the moment we still don't have optional | |
769 | * features, and, as such, there is no point introducing an interface | |
770 | * to manipulate them. This allows us to provide a cleaner, more | |
771 | * intuitive interface to the user, modifying solely persistent | |
772 | * features. | |
773 | * | |
774 | * In the future we should consider adding another interface to handle | |
775 | * optional features/flags; e.g., 'mon feature flag set/unset', or | |
776 | * 'mon flag set/unset'. | |
777 | */ | |
778 | string feature_name; | |
9f95a23c | 779 | if (!cmd_getval(cmdmap, "feature_name", feature_name)) { |
7c673cae FG |
780 | ss << "missing required feature name"; |
781 | err = -EINVAL; | |
782 | goto reply; | |
783 | } | |
784 | ||
785 | mon_feature_t feature; | |
786 | feature = ceph::features::mon::get_feature_by_name(feature_name); | |
787 | if (feature == ceph::features::mon::FEATURE_NONE) { | |
788 | ss << "unknown feature '" << feature_name << "'"; | |
789 | err = -ENOENT; | |
790 | goto reply; | |
791 | } | |
792 | ||
11fdf7f2 | 793 | bool sure = false; |
9f95a23c | 794 | cmd_getval(cmdmap, "yes_i_really_mean_it", sure); |
11fdf7f2 | 795 | if (!sure) { |
7c673cae FG |
796 | ss << "please specify '--yes-i-really-mean-it' if you " |
797 | << "really, **really** want to set feature '" | |
798 | << feature << "' in the monmap."; | |
799 | err = -EPERM; | |
800 | goto reply; | |
801 | } | |
802 | ||
f67539c2 | 803 | if (!mon.get_quorum_mon_features().contains_all(feature)) { |
7c673cae FG |
804 | ss << "current quorum does not support feature '" << feature |
805 | << "'; supported features: " | |
f67539c2 | 806 | << mon.get_quorum_mon_features(); |
7c673cae FG |
807 | err = -EINVAL; |
808 | goto reply; | |
809 | } | |
810 | ||
811 | ss << "setting feature '" << feature << "'"; | |
812 | ||
813 | err = 0; | |
814 | if (monmap.persistent_features.contains_all(feature)) { | |
815 | dout(10) << __func__ << " feature '" << feature | |
816 | << "' already set on monmap; no-op." << dendl; | |
817 | goto reply; | |
818 | } | |
819 | ||
820 | pending_map.persistent_features.set_feature(feature); | |
821 | pending_map.last_changed = ceph_clock_now(); | |
822 | propose = true; | |
823 | ||
11fdf7f2 | 824 | dout(1) << __func__ << " " << ss.str() << "; new features will be: " |
7c673cae FG |
825 | << "persistent = " << pending_map.persistent_features |
826 | // output optional nevertheless, for auditing purposes. | |
827 | << ", optional = " << pending_map.optional_features << dendl; | |
11fdf7f2 TL |
828 | |
829 | } else if (prefix == "mon set-rank") { | |
830 | string name; | |
831 | int64_t rank; | |
9f95a23c TL |
832 | if (!cmd_getval(cmdmap, "name", name) || |
833 | !cmd_getval(cmdmap, "rank", rank)) { | |
11fdf7f2 TL |
834 | err = -EINVAL; |
835 | goto reply; | |
836 | } | |
837 | int oldrank = pending_map.get_rank(name); | |
838 | if (oldrank < 0) { | |
839 | ss << "mon." << name << " does not exist in monmap"; | |
840 | err = -ENOENT; | |
841 | goto reply; | |
842 | } | |
843 | err = 0; | |
844 | pending_map.set_rank(name, rank); | |
845 | pending_map.last_changed = ceph_clock_now(); | |
846 | propose = true; | |
847 | } else if (prefix == "mon set-addrs") { | |
848 | string name; | |
849 | string addrs; | |
9f95a23c TL |
850 | if (!cmd_getval(cmdmap, "name", name) || |
851 | !cmd_getval(cmdmap, "addrs", addrs)) { | |
11fdf7f2 TL |
852 | err = -EINVAL; |
853 | goto reply; | |
854 | } | |
855 | if (!pending_map.contains(name)) { | |
856 | ss << "mon." << name << " does not exist"; | |
857 | err = -ENOENT; | |
858 | goto reply; | |
859 | } | |
860 | entity_addrvec_t av; | |
861 | if (!av.parse(addrs.c_str(), nullptr)) { | |
862 | ss << "failed to parse addrs '" << addrs << "'"; | |
863 | err = -EINVAL; | |
864 | goto reply; | |
865 | } | |
866 | for (auto& a : av.v) { | |
867 | a.set_nonce(0); | |
868 | if (!a.get_port()) { | |
869 | ss << "monitor must bind to a non-zero port, not " << a; | |
870 | err = -EINVAL; | |
871 | goto reply; | |
872 | } | |
873 | } | |
874 | err = 0; | |
875 | pending_map.set_addrvec(name, av); | |
876 | pending_map.last_changed = ceph_clock_now(); | |
877 | propose = true; | |
9f95a23c TL |
878 | } else if (prefix == "mon set-weight") { |
879 | string name; | |
880 | int64_t weight; | |
881 | if (!cmd_getval(cmdmap, "name", name) || | |
882 | !cmd_getval(cmdmap, "weight", weight)) { | |
883 | err = -EINVAL; | |
884 | goto reply; | |
885 | } | |
886 | if (!pending_map.contains(name)) { | |
887 | ss << "mon." << name << " does not exist"; | |
888 | err = -ENOENT; | |
889 | goto reply; | |
890 | } | |
891 | err = 0; | |
892 | pending_map.set_weight(name, weight); | |
893 | pending_map.last_changed = ceph_clock_now(); | |
894 | propose = true; | |
11fdf7f2 TL |
895 | } else if (prefix == "mon enable-msgr2") { |
896 | if (!monmap.get_required_features().contains_all( | |
897 | ceph::features::mon::FEATURE_NAUTILUS)) { | |
898 | err = -EACCES; | |
899 | ss << "all monitors must be running nautilus to enable v2"; | |
900 | goto reply; | |
901 | } | |
902 | for (auto& i : pending_map.mon_info) { | |
903 | if (i.second.public_addrs.v.size() == 1 && | |
904 | i.second.public_addrs.front().is_legacy() && | |
905 | i.second.public_addrs.front().get_port() == CEPH_MON_PORT_LEGACY) { | |
906 | entity_addrvec_t av; | |
907 | entity_addr_t a = i.second.public_addrs.front(); | |
908 | a.set_type(entity_addr_t::TYPE_MSGR2); | |
909 | a.set_port(CEPH_MON_PORT_IANA); | |
910 | av.v.push_back(a); | |
911 | av.v.push_back(i.second.public_addrs.front()); | |
912 | dout(10) << " setting mon." << i.first | |
913 | << " addrs " << i.second.public_addrs | |
914 | << " -> " << av << dendl; | |
915 | pending_map.set_addrvec(i.first, av); | |
916 | propose = true; | |
917 | pending_map.last_changed = ceph_clock_now(); | |
918 | } | |
919 | } | |
920 | err = 0; | |
f67539c2 TL |
921 | } else if (prefix == "mon set election_strategy") { |
922 | if (!mon.get_quorum_mon_features().contains_all( | |
923 | ceph::features::mon::FEATURE_PINGING)) { | |
924 | err = -ENOTSUP; | |
925 | ss << "Not all monitors support changing election strategies; please upgrade first!"; | |
926 | goto reply; | |
927 | } | |
928 | string strat; | |
929 | MonMap::election_strategy strategy; | |
930 | if (!cmd_getval(cmdmap, "strategy", strat)) { | |
931 | err = -EINVAL; | |
932 | goto reply; | |
933 | } | |
934 | if (strat == "classic") { | |
935 | strategy = MonMap::CLASSIC; | |
936 | } else if (strat == "disallow") { | |
937 | strategy = MonMap::DISALLOW; | |
938 | } else if (strat == "connectivity") { | |
939 | strategy = MonMap::CONNECTIVITY; | |
940 | } else { | |
941 | err = -EINVAL; | |
942 | goto reply; | |
943 | } | |
944 | err = 0; | |
945 | pending_map.strategy = strategy; | |
a4b75251 | 946 | pending_map.last_changed = ceph_clock_now(); |
f67539c2 TL |
947 | propose = true; |
948 | } else if (prefix == "mon add disallowed_leader") { | |
949 | if (!mon.get_quorum_mon_features().contains_all( | |
950 | ceph::features::mon::FEATURE_PINGING)) { | |
951 | err = -ENOTSUP; | |
952 | ss << "Not all monitors support changing election strategies; please upgrade first!"; | |
953 | goto reply; | |
954 | } | |
955 | string name; | |
956 | if (!cmd_getval(cmdmap, "name", name)) { | |
957 | err = -EINVAL; | |
958 | goto reply; | |
959 | } | |
960 | if (pending_map.strategy != MonMap::DISALLOW && | |
961 | pending_map.strategy != MonMap::CONNECTIVITY) { | |
962 | ss << "You cannot disallow monitors in your current election mode"; | |
963 | err = -EINVAL; | |
964 | goto reply; | |
965 | } | |
966 | if (!pending_map.contains(name)) { | |
967 | ss << "mon." << name << " does not exist"; | |
968 | err = -ENOENT; | |
969 | goto reply; | |
970 | } | |
971 | if (pending_map.disallowed_leaders.count(name)) { | |
972 | ss << "mon." << name << " is already disallowed"; | |
973 | err = 0; | |
974 | goto reply; | |
975 | } | |
976 | if (pending_map.disallowed_leaders.size() == pending_map.size() - 1) { | |
977 | ss << "mon." << name << " is the only remaining allowed leader!"; | |
978 | err = -EINVAL; | |
979 | goto reply; | |
980 | } | |
981 | pending_map.disallowed_leaders.insert(name); | |
a4b75251 | 982 | pending_map.last_changed = ceph_clock_now(); |
f67539c2 TL |
983 | err = 0; |
984 | propose = true; | |
985 | } else if (prefix == "mon rm disallowed_leader") { | |
986 | if (!mon.get_quorum_mon_features().contains_all( | |
987 | ceph::features::mon::FEATURE_PINGING)) { | |
988 | err = -ENOTSUP; | |
989 | ss << "Not all monitors support changing election strategies; please upgrade first!"; | |
990 | goto reply; | |
991 | } | |
992 | string name; | |
993 | if (!cmd_getval(cmdmap, "name", name)) { | |
994 | err = -EINVAL; | |
995 | goto reply; | |
996 | } | |
997 | if (pending_map.strategy != MonMap::DISALLOW && | |
998 | pending_map.strategy != MonMap::CONNECTIVITY) { | |
999 | ss << "You cannot disallow monitors in your current election mode"; | |
1000 | err = -EINVAL; | |
1001 | goto reply; | |
1002 | } | |
1003 | if (!pending_map.contains(name)) { | |
1004 | ss << "mon." << name << " does not exist"; | |
1005 | err = -ENOENT; | |
1006 | goto reply; | |
1007 | } | |
1008 | if (!pending_map.disallowed_leaders.count(name)) { | |
1009 | ss << "mon." << name << " is already allowed"; | |
1010 | err = 0; | |
1011 | goto reply; | |
1012 | } | |
1013 | pending_map.disallowed_leaders.erase(name); | |
a4b75251 | 1014 | pending_map.last_changed = ceph_clock_now(); |
f67539c2 TL |
1015 | err = 0; |
1016 | propose = true; | |
1017 | } else if (prefix == "mon set_location") { | |
1018 | if (!mon.get_quorum_mon_features().contains_all( | |
1019 | ceph::features::mon::FEATURE_PINGING)) { | |
1020 | err = -ENOTSUP; | |
1021 | ss << "Not all monitors support monitor locations; please upgrade first!"; | |
1022 | goto reply; | |
1023 | } | |
1024 | string name; | |
1025 | if (!cmd_getval(cmdmap, "name", name)) { | |
1026 | err = -EINVAL; | |
1027 | goto reply; | |
1028 | } | |
1029 | if (!pending_map.contains(name)) { | |
1030 | ss << "mon." << name << " does not exist"; | |
1031 | err = -ENOENT; | |
1032 | goto reply; | |
1033 | } | |
1034 | ||
f67539c2 TL |
1035 | vector<string> argvec; |
1036 | map<string, string> loc; | |
1037 | cmd_getval(cmdmap, "args", argvec); | |
1038 | CrushWrapper::parse_loc_map(argvec, &loc); | |
1039 | ||
1040 | dout(10) << "mon set_location for " << name << " to " << loc << dendl; | |
1041 | ||
1042 | // TODO: validate location in crush map | |
1043 | if (!loc.size()) { | |
1044 | ss << "We could not parse your input location to anything real; " << argvec | |
1045 | << " turned into an empty map!"; | |
1046 | err = -EINVAL; | |
1047 | goto reply; | |
1048 | } | |
1049 | // TODO: validate location against any existing stretch config | |
1050 | pending_map.mon_info[name].crush_loc = loc; | |
a4b75251 TL |
1051 | pending_map.last_changed = ceph_clock_now(); |
1052 | err = 0; | |
1053 | propose = true; | |
1054 | } else if (prefix == "mon set_new_tiebreaker") { | |
1055 | if (!pending_map.stretch_mode_enabled) { | |
1056 | err = -EINVAL; | |
1057 | ss << "Stretch mode is not enabled, so there is no tiebreaker"; | |
1058 | goto reply; | |
1059 | } | |
1060 | string name; | |
1061 | if (!cmd_getval(cmdmap, "name", name)) { | |
1062 | err = -EINVAL; | |
1063 | goto reply; | |
1064 | } | |
1065 | bool sure = false; | |
1066 | cmd_getval(cmdmap, "yes_i_really_mean_it", sure); | |
1067 | ||
1068 | const auto &existing_tiebreaker_info_i = pending_map.mon_info.find(pending_map.tiebreaker_mon); | |
1069 | const auto &new_tiebreaker_info_i = pending_map.mon_info.find(name); | |
1070 | if (new_tiebreaker_info_i == pending_map.mon_info.end()) { | |
1071 | ss << "mon." << name << " does not exist"; | |
1072 | err = -ENOENT; | |
1073 | goto reply; | |
1074 | } | |
1075 | const auto& new_info = new_tiebreaker_info_i->second; | |
1076 | if (new_info.crush_loc.empty()) { | |
1077 | ss << "mon." << name << " does not have a location specified"; | |
1078 | err = -EINVAL; | |
1079 | goto reply; | |
1080 | } | |
1081 | ||
1082 | if (!mon.osdmon()->is_readable()) { | |
1083 | dout(10) << __func__ | |
1084 | << ": waiting for osdmon readable to inspect crush barrier" | |
1085 | << dendl; | |
1086 | mon.osdmon()->wait_for_readable(op, new Monitor::C_RetryMessage(&mon, op)); | |
1087 | return false; | |
1088 | } | |
1089 | int32_t stretch_divider_id = mon.osdmon()->osdmap.stretch_mode_bucket; | |
1090 | string stretch_bucket_divider = mon.osdmon()->osdmap.crush-> | |
1091 | get_type_name(stretch_divider_id); | |
1092 | ||
1093 | const auto& new_loc_i = new_info.crush_loc.find(stretch_bucket_divider); | |
1094 | if (new_loc_i == new_info.crush_loc.end()) { | |
1095 | ss << "mon." << name << " has a specificed location, but not a " | |
1096 | << stretch_bucket_divider << ", which is the stretch divider"; | |
1097 | err = -EINVAL; | |
1098 | goto reply; | |
1099 | } | |
1100 | const string& new_loc = new_loc_i->second; | |
1101 | set<string> matching_mons; | |
1102 | for (const auto& mii : pending_map.mon_info) { | |
1103 | const auto& other_loc_i = mii.second.crush_loc.find(stretch_bucket_divider); | |
1104 | if (mii.first == name) { | |
1105 | continue; | |
1106 | } | |
1107 | if (other_loc_i == mii.second.crush_loc.end()) { // huh | |
1108 | continue; | |
1109 | } | |
1110 | const string& other_loc = other_loc_i->second; | |
1111 | if (other_loc == new_loc && | |
1112 | mii.first != existing_tiebreaker_info_i->first) { | |
1113 | matching_mons.insert(mii.first); | |
1114 | } | |
1115 | } | |
1116 | if (!matching_mons.empty()) { | |
1117 | ss << "mon." << name << " has location " << new_loc_i->second | |
1118 | << ", which matches mons " << matching_mons << " on the " | |
1119 | << stretch_bucket_divider << " dividing bucket for stretch mode. " | |
1120 | "Pass --yes-i-really-mean-it if you're sure you want to do this." | |
1121 | "(You really don't.)"; | |
1122 | err = -EINVAL; | |
1123 | goto reply; | |
1124 | } | |
1125 | pending_map.tiebreaker_mon = name; | |
1126 | pending_map.disallowed_leaders.insert(name); | |
1127 | pending_map.last_changed = ceph_clock_now(); | |
f67539c2 TL |
1128 | err = 0; |
1129 | propose = true; | |
1130 | } else if (prefix == "mon enable_stretch_mode") { | |
1131 | if (!mon.osdmon()->is_writeable()) { | |
a4b75251 | 1132 | dout(10) << __func__ |
f67539c2 TL |
1133 | << ": waiting for osdmon writeable for stretch mode" << dendl; |
1134 | mon.osdmon()->wait_for_writeable(op, new Monitor::C_RetryMessage(&mon, op)); | |
1135 | return false; | |
1136 | } | |
1137 | { | |
1138 | if (monmap.stretch_mode_enabled) { | |
1139 | ss << "stretch mode is already engaged"; | |
1140 | err = -EINVAL; | |
1141 | goto reply; | |
1142 | } | |
1143 | if (pending_map.stretch_mode_enabled) { | |
1144 | ss << "stretch mode currently committing"; | |
1145 | err = 0; | |
1146 | goto reply; | |
1147 | } | |
1148 | string tiebreaker_mon; | |
1149 | if (!cmd_getval(cmdmap, "tiebreaker_mon", tiebreaker_mon)) { | |
1150 | ss << "must specify a tiebreaker monitor"; | |
1151 | err = -EINVAL; | |
1152 | goto reply; | |
1153 | } | |
1154 | string new_crush_rule; | |
1155 | if (!cmd_getval(cmdmap, "new_crush_rule", new_crush_rule)) { | |
1156 | ss << "must specify a new crush rule that spreads out copies over multiple sites"; | |
1157 | err = -EINVAL; | |
1158 | goto reply; | |
1159 | } | |
1160 | string dividing_bucket; | |
1161 | if (!cmd_getval(cmdmap, "dividing_bucket", dividing_bucket)) { | |
1162 | ss << "must specify a dividing bucket"; | |
1163 | err = -EINVAL; | |
1164 | goto reply; | |
1165 | } | |
1166 | //okay, initial arguments make sense, check pools and cluster state | |
1167 | err = mon.osdmon()->check_cluster_features(CEPH_FEATUREMASK_STRETCH_MODE, ss); | |
1168 | if (err) | |
1169 | goto reply; | |
1170 | struct Plugger { | |
1171 | Paxos &p; | |
1172 | Plugger(Paxos &p) : p(p) { p.plug(); } | |
1173 | ~Plugger() { p.unplug(); } | |
1174 | } plugger(paxos); | |
1175 | ||
1176 | set<pg_pool_t*> pools; | |
1177 | bool okay = false; | |
1178 | int errcode = 0; | |
1179 | ||
1180 | mon.osdmon()->try_enable_stretch_mode_pools(ss, &okay, &errcode, | |
1181 | &pools, new_crush_rule); | |
1182 | if (!okay) { | |
1183 | err = errcode; | |
1184 | goto reply; | |
1185 | } | |
1186 | try_enable_stretch_mode(ss, &okay, &errcode, false, | |
1187 | tiebreaker_mon, dividing_bucket); | |
1188 | if (!okay) { | |
1189 | err = errcode; | |
1190 | goto reply; | |
1191 | } | |
1192 | mon.osdmon()->try_enable_stretch_mode(ss, &okay, &errcode, false, | |
1193 | dividing_bucket, 2, pools, new_crush_rule); | |
1194 | if (!okay) { | |
1195 | err = errcode; | |
1196 | goto reply; | |
1197 | } | |
1198 | // everything looks good, actually commit the changes! | |
1199 | try_enable_stretch_mode(ss, &okay, &errcode, true, | |
1200 | tiebreaker_mon, dividing_bucket); | |
1201 | mon.osdmon()->try_enable_stretch_mode(ss, &okay, &errcode, true, | |
1202 | dividing_bucket, | |
1203 | 2, // right now we only support 2 sites | |
1204 | pools, new_crush_rule); | |
1205 | ceph_assert(okay == true); | |
1206 | } | |
1207 | request_proposal(mon.osdmon()); | |
1208 | err = 0; | |
1209 | propose = true; | |
7c673cae FG |
1210 | } else { |
1211 | ss << "unknown command " << prefix; | |
1212 | err = -EINVAL; | |
1213 | } | |
1214 | ||
1215 | reply: | |
1216 | getline(ss, rs); | |
f67539c2 | 1217 | mon.reply_command(op, err, rs, get_last_committed()); |
7c673cae FG |
1218 | // we are returning to the user; do not propose. |
1219 | return propose; | |
1220 | } | |
1221 | ||
f67539c2 TL |
1222 | void MonmapMonitor::try_enable_stretch_mode(stringstream& ss, bool *okay, |
1223 | int *errcode, bool commit, | |
1224 | const string& tiebreaker_mon, | |
1225 | const string& dividing_bucket) | |
1226 | { | |
1227 | dout(20) << __func__ << dendl; | |
1228 | *okay = false; | |
1229 | if (pending_map.strategy != MonMap::CONNECTIVITY) { | |
1230 | ss << "Monitors must use the connectivity strategy to enable stretch mode"; | |
1231 | *errcode = -EINVAL; | |
1232 | ceph_assert(!commit); | |
1233 | return; | |
1234 | } | |
1235 | if (!pending_map.contains(tiebreaker_mon)) { | |
1236 | ss << "mon " << tiebreaker_mon << "does not seem to exist"; | |
1237 | *errcode = -ENOENT; | |
1238 | ceph_assert(!commit); | |
1239 | return; | |
1240 | } | |
1241 | map<string,string> buckets; | |
1242 | for (const auto&mii : mon.monmap->mon_info) { | |
1243 | const auto& mi = mii.second; | |
1244 | const auto& bi = mi.crush_loc.find(dividing_bucket); | |
1245 | if (bi == mi.crush_loc.end()) { | |
1246 | ss << "Could not find location entry for " << dividing_bucket | |
1247 | << " on monitor " << mi.name; | |
1248 | *errcode = -EINVAL; | |
1249 | ceph_assert(!commit); | |
1250 | return; | |
1251 | } | |
1252 | buckets[mii.first] = bi->second; | |
1253 | } | |
1254 | string bucket1, bucket2, tiebreaker_bucket; | |
1255 | for (auto& i : buckets) { | |
1256 | if (i.first == tiebreaker_mon) { | |
1257 | tiebreaker_bucket = i.second; | |
1258 | continue; | |
1259 | } | |
1260 | if (bucket1.empty()) { | |
1261 | bucket1 = i.second; | |
1262 | } | |
1263 | if (bucket1 != i.second && | |
1264 | bucket2.empty()) { | |
1265 | bucket2 = i.second; | |
1266 | } | |
1267 | if (bucket1 != i.second && | |
1268 | bucket2 != i.second) { | |
1269 | ss << "There are too many monitor buckets for stretch mode, found " | |
1270 | << bucket1 << "," << bucket2 << "," << i.second; | |
1271 | *errcode = -EINVAL; | |
1272 | ceph_assert(!commit); | |
1273 | return; | |
1274 | } | |
1275 | } | |
1276 | if (bucket1.empty() || bucket2.empty()) { | |
1277 | ss << "There are not enough monitor buckets for stretch mode;" | |
1278 | << " must have at least 2 plus the tiebreaker but only found " | |
1279 | << (bucket1.empty() ? bucket1 : bucket2); | |
1280 | *errcode = -EINVAL; | |
1281 | ceph_assert(!commit); | |
1282 | return; | |
1283 | } | |
1284 | if (tiebreaker_bucket == bucket1 || | |
1285 | tiebreaker_bucket == bucket2) { | |
1286 | ss << "The named tiebreaker monitor " << tiebreaker_mon | |
1287 | << " is in the same CRUSH bucket " << tiebreaker_bucket | |
1288 | << " as other monitors"; | |
1289 | *errcode = -EINVAL; | |
1290 | ceph_assert(!commit); | |
1291 | return; | |
1292 | } | |
1293 | if (commit) { | |
1294 | pending_map.disallowed_leaders.insert(tiebreaker_mon); | |
1295 | pending_map.tiebreaker_mon = tiebreaker_mon; | |
1296 | pending_map.stretch_mode_enabled = true; | |
1297 | } | |
1298 | *okay = true; | |
1299 | } | |
1300 | ||
1301 | void MonmapMonitor::trigger_degraded_stretch_mode(const set<string>& dead_mons) | |
1302 | { | |
1303 | dout(20) << __func__ << dendl; | |
1304 | pending_map.stretch_marked_down_mons.insert(dead_mons.begin(), dead_mons.end()); | |
1305 | propose_pending(); | |
1306 | } | |
1307 | ||
1308 | void MonmapMonitor::trigger_healthy_stretch_mode() | |
1309 | { | |
1310 | dout(20) << __func__ << dendl; | |
1311 | pending_map.stretch_marked_down_mons.clear(); | |
1312 | propose_pending(); | |
1313 | } | |
1314 | ||
7c673cae FG |
1315 | bool MonmapMonitor::preprocess_join(MonOpRequestRef op) |
1316 | { | |
9f95a23c | 1317 | auto join = op->get_req<MMonJoin>(); |
11fdf7f2 | 1318 | dout(10) << __func__ << " " << join->name << " at " << join->addrs << dendl; |
7c673cae | 1319 | |
11fdf7f2 | 1320 | MonSession *session = op->get_session(); |
7c673cae FG |
1321 | if (!session || |
1322 | !session->is_capable("mon", MON_CAP_W | MON_CAP_X)) { | |
1323 | dout(10) << " insufficient caps" << dendl; | |
1324 | return true; | |
1325 | } | |
1326 | ||
b3b6e05e TL |
1327 | const auto name_info_i = pending_map.mon_info.find(join->name); |
1328 | if (name_info_i != pending_map.mon_info.end() && | |
1329 | !name_info_i->second.public_addrs.front().is_blank_ip() && | |
1330 | (!join->force_loc || join->crush_loc == name_info_i->second.crush_loc)) { | |
7c673cae FG |
1331 | dout(10) << " already have " << join->name << dendl; |
1332 | return true; | |
1333 | } | |
b3b6e05e TL |
1334 | string addr_name; |
1335 | if (pending_map.contains(join->addrs)) { | |
1336 | addr_name = pending_map.get_name(join->addrs); | |
1337 | } | |
1338 | if (!addr_name.empty() && | |
1339 | addr_name == join->name && | |
1340 | (!join->force_loc || join->crush_loc.empty() || | |
1341 | pending_map.mon_info[addr_name].crush_loc == join->crush_loc)) { | |
11fdf7f2 | 1342 | dout(10) << " already have " << join->addrs << dendl; |
7c673cae FG |
1343 | return true; |
1344 | } | |
b3b6e05e TL |
1345 | if (pending_map.stretch_mode_enabled && |
1346 | join->crush_loc.empty() && | |
1347 | (addr_name.empty() || | |
1348 | pending_map.mon_info[addr_name].crush_loc.empty())) { | |
1349 | dout(10) << "stretch mode engaged but no source of crush_loc" << dendl; | |
1350 | mon.clog->info() << join->name << " attempted to join from " << join->name | |
1351 | << ' ' << join->addrs | |
1352 | << "; but lacks a crush_location for stretch mode"; | |
1353 | return true; | |
1354 | } | |
7c673cae FG |
1355 | return false; |
1356 | } | |
b3b6e05e | 1357 | |
7c673cae FG |
1358 | bool MonmapMonitor::prepare_join(MonOpRequestRef op) |
1359 | { | |
9f95a23c | 1360 | auto join = op->get_req<MMonJoin>(); |
11fdf7f2 TL |
1361 | dout(0) << "adding/updating " << join->name |
1362 | << " at " << join->addrs << " to monitor cluster" << dendl; | |
f67539c2 TL |
1363 | map<string,string> existing_loc; |
1364 | if (pending_map.contains(join->addrs)) { | |
1365 | string name = pending_map.get_name(join->addrs); | |
1366 | existing_loc = pending_map.mon_info[name].crush_loc; | |
1367 | pending_map.remove(name); | |
1368 | } | |
7c673cae FG |
1369 | if (pending_map.contains(join->name)) |
1370 | pending_map.remove(join->name); | |
11fdf7f2 | 1371 | pending_map.add(join->name, join->addrs); |
b3b6e05e TL |
1372 | pending_map.mon_info[join->name].crush_loc = |
1373 | ((join->force_loc || existing_loc.empty()) ? | |
1374 | join->crush_loc : existing_loc); | |
7c673cae FG |
1375 | pending_map.last_changed = ceph_clock_now(); |
1376 | return true; | |
1377 | } | |
1378 | ||
1379 | bool MonmapMonitor::should_propose(double& delay) | |
1380 | { | |
1381 | delay = 0.0; | |
1382 | return true; | |
1383 | } | |
1384 | ||
7c673cae FG |
1385 | int MonmapMonitor::get_monmap(bufferlist &bl) |
1386 | { | |
1387 | version_t latest_ver = get_last_committed(); | |
1388 | dout(10) << __func__ << " ver " << latest_ver << dendl; | |
1389 | ||
f67539c2 | 1390 | if (!mon.store->exists(get_service_name(), stringify(latest_ver))) |
7c673cae FG |
1391 | return -ENOENT; |
1392 | ||
1393 | int err = get_version(latest_ver, bl); | |
1394 | if (err < 0) { | |
1395 | dout(1) << __func__ << " error obtaining monmap: " | |
1396 | << cpp_strerror(err) << dendl; | |
1397 | return err; | |
1398 | } | |
1399 | return 0; | |
1400 | } | |
1401 | ||
1402 | void MonmapMonitor::check_subs() | |
1403 | { | |
1404 | const string type = "monmap"; | |
f67539c2 | 1405 | mon.with_session_map([this, &type](const MonSessionMap& session_map) { |
7c673cae FG |
1406 | auto subs = session_map.subs.find(type); |
1407 | if (subs == session_map.subs.end()) | |
1408 | return; | |
1409 | for (auto sub : *subs->second) { | |
1410 | check_sub(sub); | |
1411 | } | |
1412 | }); | |
1413 | } | |
1414 | ||
1415 | void MonmapMonitor::check_sub(Subscription *sub) | |
1416 | { | |
f67539c2 | 1417 | const auto epoch = mon.monmap->get_epoch(); |
7c673cae FG |
1418 | dout(10) << __func__ |
1419 | << " monmap next " << sub->next | |
1420 | << " have " << epoch << dendl; | |
1421 | if (sub->next <= epoch) { | |
f67539c2 | 1422 | mon.send_latest_monmap(sub->session->con.get()); |
7c673cae | 1423 | if (sub->onetime) { |
f67539c2 | 1424 | mon.with_session_map([sub](MonSessionMap& session_map) { |
7c673cae FG |
1425 | session_map.remove_sub(sub); |
1426 | }); | |
1427 | } else { | |
1428 | sub->next = epoch + 1; | |
1429 | } | |
1430 | } | |
1431 | } | |
11fdf7f2 TL |
1432 | |
1433 | void MonmapMonitor::tick() | |
1434 | { | |
1435 | if (!is_active() || | |
f67539c2 | 1436 | !mon.is_leader()) { |
11fdf7f2 TL |
1437 | return; |
1438 | } | |
1439 | ||
f67539c2 | 1440 | if (mon.monmap->created.is_zero()) { |
11fdf7f2 TL |
1441 | dout(10) << __func__ << " detected empty created stamp" << dendl; |
1442 | utime_t ctime; | |
1443 | for (version_t v = 1; v <= get_last_committed(); v++) { | |
1444 | bufferlist bl; | |
1445 | int r = get_version(v, bl); | |
1446 | if (r < 0) { | |
1447 | continue; | |
1448 | } | |
1449 | MonMap m; | |
1450 | auto p = bl.cbegin(); | |
1451 | decode(m, p); | |
1452 | if (!m.last_changed.is_zero()) { | |
1453 | dout(10) << __func__ << " first monmap with last_changed is " | |
1454 | << v << " with " << m.last_changed << dendl; | |
1455 | ctime = m.last_changed; | |
1456 | break; | |
1457 | } | |
1458 | } | |
1459 | if (ctime.is_zero()) { | |
1460 | ctime = ceph_clock_now(); | |
1461 | } | |
1462 | dout(10) << __func__ << " updating created stamp to " << ctime << dendl; | |
1463 | pending_map.created = ctime; | |
1464 | propose_pending(); | |
1465 | } | |
1466 | } |