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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) 2016 John Spray <john.spray@redhat.com> | |
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 | ||
224ce89b WB |
14 | #include <boost/tokenizer.hpp> |
15 | ||
7c673cae FG |
16 | #include "messages/MMgrBeacon.h" |
17 | #include "messages/MMgrMap.h" | |
18 | #include "messages/MMgrDigest.h" | |
19 | ||
31f18b77 | 20 | #include "PGStatService.h" |
7c673cae FG |
21 | #include "include/stringify.h" |
22 | #include "mgr/MgrContext.h" | |
c07f9fc5 | 23 | #include "mgr/mgr_commands.h" |
7c673cae FG |
24 | #include "OSDMonitor.h" |
25 | ||
26 | #include "MgrMonitor.h" | |
27 | ||
c07f9fc5 FG |
28 | #define MGR_METADATA_PREFIX "mgr_metadata" |
29 | ||
7c673cae FG |
30 | #define dout_subsys ceph_subsys_mon |
31 | #undef dout_prefix | |
32 | #define dout_prefix _prefix(_dout, mon, map) | |
33 | static ostream& _prefix(std::ostream *_dout, Monitor *mon, | |
34 | const MgrMap& mgrmap) { | |
35 | return *_dout << "mon." << mon->name << "@" << mon->rank | |
36 | << "(" << mon->get_state_name() | |
37 | << ").mgr e" << mgrmap.get_epoch() << " "; | |
38 | } | |
39 | ||
c07f9fc5 FG |
40 | // Prefix for mon store of active mgr's command descriptions |
41 | const static std::string command_descs_prefix = "mgr_command_descs"; | |
42 | ||
31f18b77 | 43 | |
7c673cae FG |
44 | void MgrMonitor::create_initial() |
45 | { | |
3efd9988 FG |
46 | // Take a local copy of initial_modules for tokenizer to iterate over. |
47 | auto initial_modules = g_conf->get_val<std::string>("mgr_initial_modules"); | |
48 | boost::tokenizer<> tok(initial_modules); | |
224ce89b WB |
49 | for (auto& m : tok) { |
50 | pending_map.modules.insert(m); | |
51 | } | |
c07f9fc5 FG |
52 | pending_command_descs = mgr_commands; |
53 | dout(10) << __func__ << " initial modules " << pending_map.modules | |
54 | << ", " << pending_command_descs.size() << " commands" | |
55 | << dendl; | |
7c673cae FG |
56 | } |
57 | ||
3efd9988 FG |
58 | void MgrMonitor::get_store_prefixes(std::set<string>& s) |
59 | { | |
60 | s.insert(service_name); | |
61 | s.insert(command_descs_prefix); | |
62 | s.insert(MGR_METADATA_PREFIX); | |
63 | } | |
64 | ||
7c673cae FG |
65 | void MgrMonitor::update_from_paxos(bool *need_bootstrap) |
66 | { | |
67 | version_t version = get_last_committed(); | |
68 | if (version != map.epoch) { | |
69 | dout(4) << "loading version " << version << dendl; | |
70 | ||
71 | bufferlist bl; | |
72 | int err = get_version(version, bl); | |
73 | assert(err == 0); | |
74 | ||
c07f9fc5 FG |
75 | bool old_available = map.get_available(); |
76 | uint64_t old_gid = map.get_active_gid(); | |
77 | ||
7c673cae FG |
78 | bufferlist::iterator p = bl.begin(); |
79 | map.decode(p); | |
80 | ||
81 | dout(4) << "active server: " << map.active_addr | |
82 | << "(" << map.active_gid << ")" << dendl; | |
83 | ||
224ce89b WB |
84 | ever_had_active_mgr = get_value("ever_had_active_mgr"); |
85 | ||
86 | load_health(); | |
87 | ||
7c673cae FG |
88 | if (map.available) { |
89 | first_seen_inactive = utime_t(); | |
90 | } else { | |
91 | first_seen_inactive = ceph_clock_now(); | |
92 | } | |
93 | ||
94 | check_subs(); | |
c07f9fc5 FG |
95 | |
96 | if (version == 1 | |
3efd9988 FG |
97 | || command_descs.empty() |
98 | || (map.get_available() | |
99 | && (!old_available || old_gid != map.get_active_gid()))) { | |
c07f9fc5 FG |
100 | dout(4) << "mkfs or daemon transitioned to available, loading commands" |
101 | << dendl; | |
102 | bufferlist loaded_commands; | |
103 | int r = mon->store->get(command_descs_prefix, "", loaded_commands); | |
104 | if (r < 0) { | |
105 | derr << "Failed to load mgr commands: " << cpp_strerror(r) << dendl; | |
106 | } else { | |
107 | auto p = loaded_commands.begin(); | |
108 | ::decode(command_descs, p); | |
109 | } | |
110 | } | |
7c673cae FG |
111 | } |
112 | ||
113 | // feed our pet MgrClient | |
114 | mon->mgr_client.ms_dispatch(new MMgrMap(map)); | |
115 | } | |
116 | ||
117 | void MgrMonitor::create_pending() | |
118 | { | |
119 | pending_map = map; | |
120 | pending_map.epoch++; | |
3efd9988 FG |
121 | |
122 | if (map.get_epoch() == 1 && | |
123 | command_descs.empty() && | |
124 | pending_command_descs.empty()) { | |
125 | // we've been through the initial map and we haven't populated the | |
126 | // command_descs vector. This likely means we came from kraken, where | |
127 | // we wouldn't populate the vector, nor would we write it to disk, on | |
128 | // create_initial(). | |
129 | create_initial(); | |
130 | } | |
7c673cae FG |
131 | } |
132 | ||
224ce89b WB |
133 | health_status_t MgrMonitor::should_warn_about_mgr_down() |
134 | { | |
135 | utime_t now = ceph_clock_now(); | |
136 | // we warn if | |
137 | // - we've ever had an active mgr, or | |
138 | // - we have osds AND we've exceeded the grace period | |
139 | // which means a new mon cluster and be HEALTH_OK indefinitely as long as | |
140 | // no OSDs are ever created. | |
141 | if (ever_had_active_mgr || | |
142 | (mon->osdmon()->osdmap.get_num_osds() > 0 && | |
3efd9988 | 143 | now > mon->monmap->created + g_conf->get_val<int64_t>("mon_mgr_mkfs_grace"))) { |
224ce89b WB |
144 | health_status_t level = HEALTH_WARN; |
145 | if (first_seen_inactive != utime_t() && | |
3efd9988 | 146 | now - first_seen_inactive > g_conf->get_val<int64_t>("mon_mgr_inactive_grace")) { |
224ce89b WB |
147 | level = HEALTH_ERR; |
148 | } | |
149 | return level; | |
150 | } | |
151 | return HEALTH_OK; | |
152 | } | |
153 | ||
7c673cae FG |
154 | void MgrMonitor::encode_pending(MonitorDBStore::TransactionRef t) |
155 | { | |
156 | dout(10) << __func__ << " " << pending_map << dendl; | |
157 | bufferlist bl; | |
158 | pending_map.encode(bl, mon->get_quorum_con_features()); | |
159 | put_version(t, pending_map.epoch, bl); | |
160 | put_last_committed(t, pending_map.epoch); | |
224ce89b | 161 | |
c07f9fc5 FG |
162 | for (auto& p : pending_metadata) { |
163 | dout(10) << __func__ << " set metadata for " << p.first << dendl; | |
164 | t->put(MGR_METADATA_PREFIX, p.first, p.second); | |
165 | } | |
166 | for (auto& name : pending_metadata_rm) { | |
167 | dout(10) << __func__ << " rm metadata for " << name << dendl; | |
168 | t->erase(MGR_METADATA_PREFIX, name); | |
169 | } | |
170 | pending_metadata.clear(); | |
171 | pending_metadata_rm.clear(); | |
172 | ||
224ce89b WB |
173 | health_check_map_t next; |
174 | if (pending_map.active_gid == 0) { | |
175 | auto level = should_warn_about_mgr_down(); | |
176 | if (level != HEALTH_OK) { | |
177 | next.add("MGR_DOWN", level, "no active mgr"); | |
178 | } else { | |
179 | dout(10) << __func__ << " no health warning (never active and new cluster)" | |
180 | << dendl; | |
181 | } | |
182 | } else { | |
183 | put_value(t, "ever_had_active_mgr", 1); | |
184 | } | |
185 | encode_health(next, t); | |
c07f9fc5 FG |
186 | |
187 | if (pending_command_descs.size()) { | |
188 | dout(4) << __func__ << " encoding " << pending_command_descs.size() | |
189 | << " command_descs" << dendl; | |
190 | for (auto& p : pending_command_descs) { | |
191 | p.set_flag(MonCommand::FLAG_MGR); | |
192 | } | |
193 | bufferlist bl; | |
194 | ::encode(pending_command_descs, bl); | |
195 | t->put(command_descs_prefix, "", bl); | |
196 | pending_command_descs.clear(); | |
197 | } | |
7c673cae FG |
198 | } |
199 | ||
200 | bool MgrMonitor::check_caps(MonOpRequestRef op, const uuid_d& fsid) | |
201 | { | |
202 | // check permissions | |
203 | MonSession *session = op->get_session(); | |
204 | if (!session) | |
205 | return false; | |
206 | if (!session->is_capable("mgr", MON_CAP_X)) { | |
207 | dout(1) << __func__ << " insufficient caps " << session->caps << dendl; | |
208 | return false; | |
209 | } | |
210 | if (fsid != mon->monmap->fsid) { | |
211 | dout(1) << __func__ << " op fsid " << fsid | |
212 | << " != " << mon->monmap->fsid << dendl; | |
213 | return false; | |
214 | } | |
215 | return true; | |
216 | } | |
217 | ||
218 | bool MgrMonitor::preprocess_query(MonOpRequestRef op) | |
219 | { | |
220 | PaxosServiceMessage *m = static_cast<PaxosServiceMessage*>(op->get_req()); | |
221 | switch (m->get_type()) { | |
222 | case MSG_MGR_BEACON: | |
223 | return preprocess_beacon(op); | |
224 | case MSG_MON_COMMAND: | |
225 | return preprocess_command(op); | |
226 | default: | |
227 | mon->no_reply(op); | |
228 | derr << "Unhandled message type " << m->get_type() << dendl; | |
229 | return true; | |
230 | } | |
231 | } | |
232 | ||
233 | bool MgrMonitor::prepare_update(MonOpRequestRef op) | |
234 | { | |
235 | PaxosServiceMessage *m = static_cast<PaxosServiceMessage*>(op->get_req()); | |
236 | switch (m->get_type()) { | |
237 | case MSG_MGR_BEACON: | |
238 | return prepare_beacon(op); | |
239 | ||
240 | case MSG_MON_COMMAND: | |
241 | return prepare_command(op); | |
242 | ||
243 | default: | |
244 | mon->no_reply(op); | |
245 | derr << "Unhandled message type " << m->get_type() << dendl; | |
246 | return true; | |
247 | } | |
248 | } | |
249 | ||
250 | ||
251 | ||
252 | class C_Updated : public Context { | |
253 | MgrMonitor *mm; | |
254 | MonOpRequestRef op; | |
255 | public: | |
256 | C_Updated(MgrMonitor *a, MonOpRequestRef c) : | |
257 | mm(a), op(c) {} | |
258 | void finish(int r) override { | |
259 | if (r >= 0) { | |
260 | // Success | |
261 | } else if (r == -ECANCELED) { | |
262 | mm->mon->no_reply(op); | |
263 | } else { | |
264 | mm->dispatch(op); // try again | |
265 | } | |
266 | } | |
267 | }; | |
268 | ||
269 | bool MgrMonitor::preprocess_beacon(MonOpRequestRef op) | |
270 | { | |
271 | MMgrBeacon *m = static_cast<MMgrBeacon*>(op->get_req()); | |
272 | dout(4) << "beacon from " << m->get_gid() << dendl; | |
273 | ||
274 | if (!check_caps(op, m->get_fsid())) { | |
275 | // drop it on the floor | |
276 | return true; | |
277 | } | |
278 | ||
279 | // always send this to the leader's prepare_beacon() | |
280 | return false; | |
281 | } | |
282 | ||
283 | bool MgrMonitor::prepare_beacon(MonOpRequestRef op) | |
284 | { | |
285 | MMgrBeacon *m = static_cast<MMgrBeacon*>(op->get_req()); | |
286 | dout(4) << "beacon from " << m->get_gid() << dendl; | |
287 | ||
288 | // See if we are seeing same name, new GID for the active daemon | |
289 | if (m->get_name() == pending_map.active_name | |
290 | && m->get_gid() != pending_map.active_gid) | |
291 | { | |
292 | dout(4) << "Active daemon restart (mgr." << m->get_name() << ")" << dendl; | |
224ce89b WB |
293 | mon->clog->info() << "Active manager daemon " << m->get_name() |
294 | << " restarted"; | |
7c673cae FG |
295 | drop_active(); |
296 | } | |
297 | ||
298 | // See if we are seeing same name, new GID for any standbys | |
299 | for (const auto &i : pending_map.standbys) { | |
300 | const StandbyInfo &s = i.second; | |
301 | if (s.name == m->get_name() && s.gid != m->get_gid()) { | |
302 | dout(4) << "Standby daemon restart (mgr." << m->get_name() << ")" << dendl; | |
224ce89b WB |
303 | mon->clog->debug() << "Standby manager daemon " << m->get_name() |
304 | << " restarted"; | |
7c673cae FG |
305 | drop_standby(i.first); |
306 | break; | |
307 | } | |
308 | } | |
309 | ||
31f18b77 | 310 | last_beacon[m->get_gid()] = ceph::coarse_mono_clock::now(); |
7c673cae FG |
311 | |
312 | // Track whether we modified pending_map | |
313 | bool updated = false; | |
314 | ||
315 | if (pending_map.active_gid == m->get_gid()) { | |
3efd9988 FG |
316 | if (pending_map.services != m->get_services()) { |
317 | dout(4) << "updated services from mgr." << m->get_name() | |
318 | << ": " << m->get_services() << dendl; | |
319 | pending_map.services = m->get_services(); | |
320 | updated = true; | |
321 | } | |
322 | ||
7c673cae FG |
323 | // A beacon from the currently active daemon |
324 | if (pending_map.active_addr != m->get_server_addr()) { | |
325 | dout(4) << "learned address " << m->get_server_addr() | |
326 | << " (was " << pending_map.active_addr << ")" << dendl; | |
327 | pending_map.active_addr = m->get_server_addr(); | |
328 | updated = true; | |
329 | } | |
330 | ||
331 | if (pending_map.get_available() != m->get_available()) { | |
332 | dout(4) << "available " << m->get_gid() << dendl; | |
224ce89b WB |
333 | mon->clog->info() << "Manager daemon " << pending_map.active_name |
334 | << " is now available"; | |
c07f9fc5 FG |
335 | |
336 | // This beacon should include command descriptions | |
337 | pending_command_descs = m->get_command_descs(); | |
338 | if (pending_command_descs.empty()) { | |
339 | // This should not happen, but it also isn't fatal: we just | |
340 | // won't successfully update our list of commands. | |
341 | dout(4) << "First available beacon from " << pending_map.active_name | |
342 | << "(" << m->get_gid() << ") does not include command descs" | |
343 | << dendl; | |
344 | } else { | |
345 | dout(4) << "First available beacon from " << pending_map.active_name | |
346 | << "(" << m->get_gid() << ") includes " | |
347 | << pending_command_descs.size() << " command descs" << dendl; | |
348 | } | |
349 | ||
7c673cae FG |
350 | pending_map.available = m->get_available(); |
351 | updated = true; | |
352 | } | |
224ce89b WB |
353 | if (pending_map.available_modules != m->get_available_modules()) { |
354 | dout(4) << "available_modules " << m->get_available_modules() | |
355 | << " (was " << pending_map.available_modules << ")" << dendl; | |
356 | pending_map.available_modules = m->get_available_modules(); | |
357 | updated = true; | |
358 | } | |
7c673cae FG |
359 | } else if (pending_map.active_gid == 0) { |
360 | // There is no currently active daemon, select this one. | |
361 | if (pending_map.standbys.count(m->get_gid())) { | |
181888fb | 362 | drop_standby(m->get_gid(), false); |
7c673cae FG |
363 | } |
364 | dout(4) << "selecting new active " << m->get_gid() | |
365 | << " " << m->get_name() | |
366 | << " (was " << pending_map.active_gid << " " | |
367 | << pending_map.active_name << ")" << dendl; | |
368 | pending_map.active_gid = m->get_gid(); | |
369 | pending_map.active_name = m->get_name(); | |
224ce89b | 370 | pending_map.available_modules = m->get_available_modules(); |
c07f9fc5 FG |
371 | ::encode(m->get_metadata(), pending_metadata[m->get_name()]); |
372 | pending_metadata_rm.erase(m->get_name()); | |
224ce89b WB |
373 | |
374 | mon->clog->info() << "Activating manager daemon " | |
375 | << pending_map.active_name; | |
7c673cae FG |
376 | |
377 | updated = true; | |
378 | } else { | |
379 | if (pending_map.standbys.count(m->get_gid()) > 0) { | |
380 | dout(10) << "from existing standby " << m->get_gid() << dendl; | |
224ce89b WB |
381 | if (pending_map.standbys[m->get_gid()].available_modules != |
382 | m->get_available_modules()) { | |
383 | dout(10) << "existing standby " << m->get_gid() << " available_modules " | |
384 | << m->get_available_modules() << " (was " | |
385 | << pending_map.standbys[m->get_gid()].available_modules << ")" | |
386 | << dendl; | |
387 | pending_map.standbys[m->get_gid()].available_modules = | |
388 | m->get_available_modules(); | |
389 | updated = true; | |
390 | } | |
7c673cae FG |
391 | } else { |
392 | dout(10) << "new standby " << m->get_gid() << dendl; | |
224ce89b WB |
393 | mon->clog->debug() << "Standby manager daemon " << m->get_name() |
394 | << " started"; | |
c07f9fc5 FG |
395 | pending_map.standbys[m->get_gid()] = {m->get_gid(), m->get_name(), |
396 | m->get_available_modules()}; | |
397 | ::encode(m->get_metadata(), pending_metadata[m->get_name()]); | |
398 | pending_metadata_rm.erase(m->get_name()); | |
7c673cae FG |
399 | updated = true; |
400 | } | |
401 | } | |
402 | ||
403 | if (updated) { | |
404 | dout(4) << "updating map" << dendl; | |
405 | wait_for_finished_proposal(op, new C_Updated(this, op)); | |
406 | } else { | |
407 | dout(10) << "no change" << dendl; | |
408 | } | |
409 | ||
410 | return updated; | |
411 | } | |
412 | ||
413 | void MgrMonitor::check_subs() | |
414 | { | |
415 | const std::string type = "mgrmap"; | |
416 | if (mon->session_map.subs.count(type) == 0) | |
417 | return; | |
418 | for (auto sub : *(mon->session_map.subs[type])) { | |
419 | check_sub(sub); | |
420 | } | |
421 | } | |
422 | ||
423 | void MgrMonitor::check_sub(Subscription *sub) | |
424 | { | |
425 | if (sub->type == "mgrmap") { | |
426 | if (sub->next <= map.get_epoch()) { | |
224ce89b WB |
427 | dout(20) << "Sending map to subscriber " << sub->session->con |
428 | << " " << sub->session->con->get_peer_addr() << dendl; | |
7c673cae FG |
429 | sub->session->con->send_message(new MMgrMap(map)); |
430 | if (sub->onetime) { | |
431 | mon->session_map.remove_sub(sub); | |
432 | } else { | |
433 | sub->next = map.get_epoch() + 1; | |
434 | } | |
435 | } | |
436 | } else { | |
437 | assert(sub->type == "mgrdigest"); | |
c07f9fc5 FG |
438 | if (sub->next == 0) { |
439 | // new registration; cancel previous timer | |
440 | cancel_timer(); | |
441 | } | |
31f18b77 | 442 | if (digest_event == nullptr) { |
7c673cae FG |
443 | send_digests(); |
444 | } | |
445 | } | |
446 | } | |
447 | ||
448 | /** | |
449 | * Handle digest subscriptions separately (outside of check_sub) because | |
450 | * they are going to be periodic rather than version-driven. | |
451 | */ | |
452 | void MgrMonitor::send_digests() | |
453 | { | |
31f18b77 FG |
454 | cancel_timer(); |
455 | ||
456 | if (!is_active()) { | |
457 | return; | |
458 | } | |
224ce89b | 459 | dout(10) << __func__ << dendl; |
7c673cae FG |
460 | |
461 | const std::string type = "mgrdigest"; | |
462 | if (mon->session_map.subs.count(type) == 0) | |
463 | return; | |
464 | ||
465 | for (auto sub : *(mon->session_map.subs[type])) { | |
224ce89b WB |
466 | dout(10) << __func__ << " sending digest to subscriber " << sub->session->con |
467 | << " " << sub->session->con->get_peer_addr() << dendl; | |
7c673cae FG |
468 | MMgrDigest *mdigest = new MMgrDigest; |
469 | ||
470 | JSONFormatter f; | |
224ce89b | 471 | mon->get_health_status(true, &f, nullptr, nullptr, nullptr); |
7c673cae FG |
472 | f.flush(mdigest->health_json); |
473 | f.reset(); | |
474 | ||
475 | std::ostringstream ss; | |
476 | mon->get_mon_status(&f, ss); | |
477 | f.flush(mdigest->mon_status_json); | |
478 | f.reset(); | |
479 | ||
480 | sub->session->con->send_message(mdigest); | |
481 | } | |
482 | ||
3efd9988 FG |
483 | digest_event = mon->timer.add_event_after( |
484 | g_conf->get_val<int64_t>("mon_mgr_digest_period"), | |
485 | new C_MonContext(mon, [this](int) { | |
7c673cae | 486 | send_digests(); |
3efd9988 | 487 | })); |
31f18b77 FG |
488 | } |
489 | ||
490 | void MgrMonitor::cancel_timer() | |
491 | { | |
492 | if (digest_event) { | |
493 | mon->timer.cancel_event(digest_event); | |
494 | digest_event = nullptr; | |
495 | } | |
7c673cae FG |
496 | } |
497 | ||
498 | void MgrMonitor::on_active() | |
499 | { | |
224ce89b WB |
500 | if (mon->is_leader()) { |
501 | mon->clog->debug() << "mgrmap e" << map.epoch << ": " << map; | |
502 | } | |
7c673cae FG |
503 | } |
504 | ||
505 | void MgrMonitor::get_health( | |
506 | list<pair<health_status_t,string> >& summary, | |
507 | list<pair<health_status_t,string> > *detail, | |
508 | CephContext *cct) const | |
509 | { | |
510 | // start mgr warnings as soon as the mons and osds are all upgraded, | |
511 | // but before the require_luminous osdmap flag is set. this way the | |
512 | // user gets some warning before the osd flag is set and mgr is | |
513 | // actually *required*. | |
514 | if (!mon->monmap->get_required_features().contains_all( | |
515 | ceph::features::mon::FEATURE_LUMINOUS) || | |
516 | !HAVE_FEATURE(mon->osdmon()->osdmap.get_up_osd_features(), | |
517 | SERVER_LUMINOUS)) { | |
518 | return; | |
519 | } | |
520 | ||
224ce89b | 521 | if (map.active_gid == 0) { |
7c673cae FG |
522 | auto level = HEALTH_WARN; |
523 | // do not escalate to ERR if they are still upgrading to jewel. | |
31f18b77 | 524 | if (mon->osdmon()->osdmap.require_osd_release >= CEPH_RELEASE_LUMINOUS) { |
7c673cae FG |
525 | utime_t now = ceph_clock_now(); |
526 | if (first_seen_inactive != utime_t() && | |
3efd9988 | 527 | now - first_seen_inactive > g_conf->get_val<int64_t>("mon_mgr_inactive_grace")) { |
7c673cae FG |
528 | level = HEALTH_ERR; |
529 | } | |
530 | } | |
531 | summary.push_back(make_pair(level, "no active mgr")); | |
532 | } | |
533 | } | |
534 | ||
535 | void MgrMonitor::tick() | |
536 | { | |
537 | if (!is_active() || !mon->is_leader()) | |
538 | return; | |
539 | ||
31f18b77 | 540 | const auto now = ceph::coarse_mono_clock::now(); |
3efd9988 FG |
541 | |
542 | const auto mgr_beacon_grace = std::chrono::seconds( | |
543 | g_conf->get_val<int64_t>("mon_mgr_beacon_grace")); | |
544 | ||
545 | // Note that this is the mgr daemon's tick period, not ours (the | |
546 | // beacon is sent with this period). | |
547 | const auto mgr_tick_period = std::chrono::seconds( | |
548 | g_conf->get_val<int64_t>("mgr_tick_period")); | |
549 | ||
550 | if (last_tick != ceph::coarse_mono_clock::time_point::min() | |
551 | && (now - last_tick > (mgr_beacon_grace - mgr_tick_period))) { | |
552 | // This case handles either local slowness (calls being delayed | |
553 | // for whatever reason) or cluster election slowness (a long gap | |
554 | // between calls while an election happened) | |
555 | dout(4) << __func__ << ": resetting beacon timeouts due to mon delay " | |
556 | "(slow election?) of " << now - last_tick << " seconds" << dendl; | |
557 | for (auto &i : last_beacon) { | |
558 | i.second = now; | |
559 | } | |
560 | } | |
561 | ||
562 | last_tick = now; | |
7c673cae FG |
563 | |
564 | // Populate any missing beacons (i.e. no beacon since MgrMonitor | |
565 | // instantiation) with the current time, so that they will | |
566 | // eventually look laggy if they fail to give us a beacon. | |
567 | if (pending_map.active_gid != 0 | |
568 | && last_beacon.count(pending_map.active_gid) == 0) { | |
569 | last_beacon[pending_map.active_gid] = now; | |
570 | } | |
571 | for (auto s : pending_map.standbys) { | |
572 | if (last_beacon.count(s.first) == 0) { | |
573 | last_beacon[s.first] = now; | |
574 | } | |
575 | } | |
576 | ||
577 | // Cull standbys first so that any remaining standbys | |
578 | // will be eligible to take over from the active if we cull him. | |
579 | std::list<uint64_t> dead_standbys; | |
3efd9988 | 580 | const auto cutoff = now - mgr_beacon_grace; |
7c673cae FG |
581 | for (const auto &i : pending_map.standbys) { |
582 | auto last_beacon_time = last_beacon.at(i.first); | |
583 | if (last_beacon_time < cutoff) { | |
584 | dead_standbys.push_back(i.first); | |
585 | } | |
586 | } | |
587 | ||
588 | bool propose = false; | |
589 | ||
590 | for (auto i : dead_standbys) { | |
591 | dout(4) << "Dropping laggy standby " << i << dendl; | |
592 | drop_standby(i); | |
593 | propose = true; | |
594 | } | |
595 | ||
596 | if (pending_map.active_gid != 0 | |
597 | && last_beacon.at(pending_map.active_gid) < cutoff) { | |
224ce89b | 598 | const std::string old_active_name = pending_map.active_name; |
7c673cae FG |
599 | drop_active(); |
600 | propose = true; | |
601 | dout(4) << "Dropping active" << pending_map.active_gid << dendl; | |
602 | if (promote_standby()) { | |
603 | dout(4) << "Promoted standby " << pending_map.active_gid << dendl; | |
224ce89b WB |
604 | mon->clog->info() << "Manager daemon " << old_active_name |
605 | << " is unresponsive, replacing it with standby" | |
606 | << " daemon " << pending_map.active_name; | |
7c673cae FG |
607 | } else { |
608 | dout(4) << "Active is laggy but have no standbys to replace it" << dendl; | |
224ce89b WB |
609 | mon->clog->warn() << "Manager daemon " << old_active_name |
610 | << " is unresponsive. No standby daemons available."; | |
7c673cae FG |
611 | } |
612 | } else if (pending_map.active_gid == 0) { | |
613 | if (promote_standby()) { | |
614 | dout(4) << "Promoted standby " << pending_map.active_gid << dendl; | |
224ce89b | 615 | mon->clog->info() << "Activating manager daemon " |
3efd9988 | 616 | << pending_map.active_name; |
7c673cae FG |
617 | propose = true; |
618 | } | |
619 | } | |
620 | ||
224ce89b | 621 | if (!pending_map.available && |
c07f9fc5 | 622 | !ever_had_active_mgr && |
224ce89b | 623 | should_warn_about_mgr_down() != HEALTH_OK) { |
3efd9988 FG |
624 | dout(10) << " exceeded mon_mgr_mkfs_grace " |
625 | << g_conf->get_val<int64_t>("mon_mgr_mkfs_grace") | |
626 | << " seconds" << dendl; | |
224ce89b WB |
627 | propose = true; |
628 | } | |
629 | ||
7c673cae FG |
630 | if (propose) { |
631 | propose_pending(); | |
632 | } | |
633 | } | |
634 | ||
224ce89b WB |
635 | void MgrMonitor::on_restart() |
636 | { | |
637 | // Clear out the leader-specific state. | |
638 | last_beacon.clear(); | |
3efd9988 | 639 | last_tick = ceph::coarse_mono_clock::now(); |
224ce89b WB |
640 | } |
641 | ||
642 | ||
7c673cae FG |
643 | bool MgrMonitor::promote_standby() |
644 | { | |
645 | assert(pending_map.active_gid == 0); | |
646 | if (pending_map.standbys.size()) { | |
647 | // Promote a replacement (arbitrary choice of standby) | |
648 | auto replacement_gid = pending_map.standbys.begin()->first; | |
649 | pending_map.active_gid = replacement_gid; | |
650 | pending_map.active_name = pending_map.standbys.at(replacement_gid).name; | |
651 | pending_map.available = false; | |
652 | pending_map.active_addr = entity_addr_t(); | |
653 | ||
181888fb FG |
654 | drop_standby(replacement_gid, false); |
655 | ||
7c673cae FG |
656 | return true; |
657 | } else { | |
658 | return false; | |
659 | } | |
660 | } | |
661 | ||
662 | void MgrMonitor::drop_active() | |
663 | { | |
664 | if (last_beacon.count(pending_map.active_gid) > 0) { | |
665 | last_beacon.erase(pending_map.active_gid); | |
666 | } | |
667 | ||
c07f9fc5 FG |
668 | pending_metadata_rm.insert(pending_map.active_name); |
669 | pending_metadata.erase(pending_map.active_name); | |
7c673cae FG |
670 | pending_map.active_name = ""; |
671 | pending_map.active_gid = 0; | |
672 | pending_map.available = false; | |
673 | pending_map.active_addr = entity_addr_t(); | |
3efd9988 | 674 | pending_map.services.clear(); |
224ce89b WB |
675 | |
676 | // So that when new active mgr subscribes to mgrdigest, it will | |
677 | // get an immediate response instead of waiting for next timer | |
678 | cancel_timer(); | |
7c673cae FG |
679 | } |
680 | ||
181888fb | 681 | void MgrMonitor::drop_standby(uint64_t gid, bool drop_meta) |
7c673cae | 682 | { |
181888fb FG |
683 | if (drop_meta) { |
684 | pending_metadata_rm.insert(pending_map.standbys[gid].name); | |
685 | pending_metadata.erase(pending_map.standbys[gid].name); | |
686 | } | |
7c673cae FG |
687 | pending_map.standbys.erase(gid); |
688 | if (last_beacon.count(gid) > 0) { | |
689 | last_beacon.erase(gid); | |
690 | } | |
7c673cae FG |
691 | } |
692 | ||
693 | bool MgrMonitor::preprocess_command(MonOpRequestRef op) | |
694 | { | |
31f18b77 FG |
695 | MMonCommand *m = static_cast<MMonCommand*>(op->get_req()); |
696 | std::stringstream ss; | |
697 | bufferlist rdata; | |
698 | ||
699 | std::map<std::string, cmd_vartype> cmdmap; | |
700 | if (!cmdmap_from_json(m->cmd, &cmdmap, ss)) { | |
701 | string rs = ss.str(); | |
702 | mon->reply_command(op, -EINVAL, rs, rdata, get_last_committed()); | |
703 | return true; | |
704 | } | |
7c673cae | 705 | |
31f18b77 FG |
706 | MonSession *session = m->get_session(); |
707 | if (!session) { | |
708 | mon->reply_command(op, -EACCES, "access denied", rdata, | |
709 | get_last_committed()); | |
710 | return true; | |
711 | } | |
712 | ||
713 | string format; | |
714 | cmd_getval(g_ceph_context, cmdmap, "format", format, string("json-pretty")); | |
715 | boost::scoped_ptr<Formatter> f(Formatter::create(format)); | |
716 | ||
717 | string prefix; | |
718 | cmd_getval(g_ceph_context, cmdmap, "prefix", prefix); | |
719 | int r = 0; | |
720 | ||
721 | if (prefix == "mgr dump") { | |
722 | int64_t epoch = 0; | |
723 | cmd_getval(g_ceph_context, cmdmap, "epoch", epoch, (int64_t)map.get_epoch()); | |
724 | if (epoch == (int64_t)map.get_epoch()) { | |
725 | f->dump_object("mgrmap", map); | |
726 | } else { | |
727 | bufferlist bl; | |
728 | int err = get_version(epoch, bl); | |
729 | if (err == -ENOENT) { | |
730 | r = -ENOENT; | |
731 | ss << "there is no map for epoch " << epoch; | |
732 | goto reply; | |
733 | } | |
734 | MgrMap m; | |
735 | auto p = bl.begin(); | |
736 | m.decode(p); | |
737 | f->dump_object("mgrmap", m); | |
738 | } | |
739 | f->flush(rdata); | |
224ce89b | 740 | } else if (prefix == "mgr module ls") { |
3efd9988 FG |
741 | f->open_object_section("modules"); |
742 | { | |
743 | f->open_array_section("enabled_modules"); | |
744 | for (auto& p : map.modules) { | |
745 | f->dump_string("module", p); | |
746 | } | |
747 | f->close_section(); | |
748 | f->open_array_section("disabled_modules"); | |
749 | for (auto& p : map.available_modules) { | |
750 | if (map.modules.count(p) == 0) { | |
751 | f->dump_string("module", p); | |
752 | } | |
753 | } | |
754 | f->close_section(); | |
755 | } | |
756 | f->close_section(); | |
757 | f->flush(rdata); | |
758 | } else if (prefix == "mgr services") { | |
759 | f->open_object_section("services"); | |
760 | for (const auto &i : map.services) { | |
761 | f->dump_string(i.first.c_str(), i.second); | |
224ce89b WB |
762 | } |
763 | f->close_section(); | |
764 | f->flush(rdata); | |
c07f9fc5 FG |
765 | } else if (prefix == "mgr metadata") { |
766 | string name; | |
767 | cmd_getval(g_ceph_context, cmdmap, "id", name); | |
768 | if (name.size() > 0 && !map.have_name(name)) { | |
769 | ss << "mgr." << name << " does not exist"; | |
770 | r = -ENOENT; | |
771 | goto reply; | |
772 | } | |
773 | string format; | |
774 | cmd_getval(g_ceph_context, cmdmap, "format", format); | |
775 | boost::scoped_ptr<Formatter> f(Formatter::create(format, "json-pretty", "json-pretty")); | |
776 | if (name.size()) { | |
777 | f->open_object_section("mgr_metadata"); | |
778 | f->dump_string("id", name); | |
779 | r = dump_metadata(name, f.get(), &ss); | |
780 | if (r < 0) | |
781 | goto reply; | |
782 | f->close_section(); | |
783 | } else { | |
784 | r = 0; | |
785 | f->open_array_section("mgr_metadata"); | |
786 | for (auto& i : map.get_all_names()) { | |
787 | f->open_object_section("mgr"); | |
788 | f->dump_string("id", i); | |
789 | r = dump_metadata(i, f.get(), NULL); | |
790 | if (r == -EINVAL || r == -ENOENT) { | |
791 | // Drop error, continue to get other daemons' metadata | |
792 | dout(4) << "No metadata for mgr." << i << dendl; | |
793 | r = 0; | |
794 | } else if (r < 0) { | |
795 | // Unexpected error | |
796 | goto reply; | |
797 | } | |
798 | f->close_section(); | |
799 | } | |
800 | f->close_section(); | |
801 | } | |
802 | f->flush(rdata); | |
803 | } else if (prefix == "mgr versions") { | |
804 | if (!f) | |
805 | f.reset(Formatter::create("json-pretty")); | |
806 | count_metadata("ceph_version", f.get()); | |
807 | f->flush(rdata); | |
808 | r = 0; | |
809 | } else if (prefix == "mgr count-metadata") { | |
810 | if (!f) | |
811 | f.reset(Formatter::create("json-pretty")); | |
812 | string field; | |
813 | cmd_getval(g_ceph_context, cmdmap, "property", field); | |
814 | count_metadata(field, f.get()); | |
815 | f->flush(rdata); | |
816 | r = 0; | |
31f18b77 FG |
817 | } else { |
818 | return false; | |
819 | } | |
820 | ||
821 | reply: | |
822 | string rs; | |
823 | getline(ss, rs); | |
824 | mon->reply_command(op, r, rs, rdata, get_last_committed()); | |
825 | return true; | |
7c673cae FG |
826 | } |
827 | ||
828 | bool MgrMonitor::prepare_command(MonOpRequestRef op) | |
829 | { | |
830 | MMonCommand *m = static_cast<MMonCommand*>(op->get_req()); | |
831 | ||
832 | std::stringstream ss; | |
833 | bufferlist rdata; | |
834 | ||
835 | std::map<std::string, cmd_vartype> cmdmap; | |
836 | if (!cmdmap_from_json(m->cmd, &cmdmap, ss)) { | |
837 | string rs = ss.str(); | |
838 | mon->reply_command(op, -EINVAL, rs, rdata, get_last_committed()); | |
839 | return true; | |
840 | } | |
841 | ||
842 | MonSession *session = m->get_session(); | |
843 | if (!session) { | |
844 | mon->reply_command(op, -EACCES, "access denied", rdata, get_last_committed()); | |
845 | return true; | |
846 | } | |
847 | ||
224ce89b WB |
848 | string format; |
849 | cmd_getval(g_ceph_context, cmdmap, "format", format, string("plain")); | |
850 | boost::scoped_ptr<Formatter> f(Formatter::create(format)); | |
851 | ||
7c673cae FG |
852 | string prefix; |
853 | cmd_getval(g_ceph_context, cmdmap, "prefix", prefix); | |
854 | ||
855 | int r = 0; | |
856 | ||
857 | if (prefix == "mgr fail") { | |
858 | string who; | |
859 | cmd_getval(g_ceph_context, cmdmap, "who", who); | |
860 | ||
861 | std::string err; | |
862 | uint64_t gid = strict_strtol(who.c_str(), 10, &err); | |
863 | bool changed = false; | |
864 | if (!err.empty()) { | |
865 | // Does not parse as a gid, treat it as a name | |
866 | if (pending_map.active_name == who) { | |
867 | drop_active(); | |
868 | changed = true; | |
869 | } else { | |
870 | gid = 0; | |
871 | for (const auto &i : pending_map.standbys) { | |
872 | if (i.second.name == who) { | |
873 | gid = i.first; | |
874 | break; | |
875 | } | |
876 | } | |
877 | if (gid != 0) { | |
878 | drop_standby(gid); | |
879 | changed = true; | |
880 | } else { | |
881 | ss << "Daemon not found '" << who << "', already failed?"; | |
882 | } | |
883 | } | |
884 | } else { | |
885 | if (pending_map.active_gid == gid) { | |
886 | drop_active(); | |
887 | changed = true; | |
888 | } else if (pending_map.standbys.count(gid) > 0) { | |
889 | drop_standby(gid); | |
890 | changed = true; | |
891 | } else { | |
892 | ss << "Daemon not found '" << gid << "', already failed?"; | |
893 | } | |
894 | } | |
895 | ||
896 | if (changed && pending_map.active_gid == 0) { | |
897 | promote_standby(); | |
898 | } | |
224ce89b WB |
899 | } else if (prefix == "mgr module enable") { |
900 | string module; | |
901 | cmd_getval(g_ceph_context, cmdmap, "module", module); | |
902 | if (module.empty()) { | |
903 | r = -EINVAL; | |
904 | goto out; | |
905 | } | |
906 | string force; | |
907 | cmd_getval(g_ceph_context, cmdmap, "force", force); | |
908 | if (!pending_map.all_support_module(module) && | |
909 | force != "--force") { | |
910 | ss << "all mgr daemons do not support module '" << module << "', pass " | |
911 | << "--force to force enablement"; | |
912 | r = -ENOENT; | |
913 | goto out; | |
914 | } | |
915 | pending_map.modules.insert(module); | |
916 | } else if (prefix == "mgr module disable") { | |
917 | string module; | |
918 | cmd_getval(g_ceph_context, cmdmap, "module", module); | |
919 | if (module.empty()) { | |
920 | r = -EINVAL; | |
921 | goto out; | |
922 | } | |
923 | pending_map.modules.erase(module); | |
7c673cae | 924 | } else { |
224ce89b | 925 | ss << "Command '" << prefix << "' not implemented!"; |
7c673cae FG |
926 | r = -ENOSYS; |
927 | } | |
928 | ||
224ce89b | 929 | out: |
7c673cae FG |
930 | dout(4) << __func__ << " done, r=" << r << dendl; |
931 | /* Compose response */ | |
932 | string rs; | |
933 | getline(ss, rs); | |
934 | ||
935 | if (r >= 0) { | |
936 | // success.. delay reply | |
937 | wait_for_finished_proposal(op, new Monitor::C_Command(mon, op, r, rs, | |
938 | get_last_committed() + 1)); | |
939 | return true; | |
940 | } else { | |
941 | // reply immediately | |
942 | mon->reply_command(op, r, rs, rdata, get_last_committed()); | |
943 | return false; | |
944 | } | |
945 | } | |
946 | ||
947 | void MgrMonitor::init() | |
948 | { | |
31f18b77 | 949 | if (digest_event == nullptr) { |
7c673cae FG |
950 | send_digests(); // To get it to schedule its own event |
951 | } | |
952 | } | |
953 | ||
954 | void MgrMonitor::on_shutdown() | |
955 | { | |
31f18b77 | 956 | cancel_timer(); |
7c673cae FG |
957 | } |
958 | ||
c07f9fc5 FG |
959 | int MgrMonitor::load_metadata(const string& name, std::map<string, string>& m, |
960 | ostream *err) | |
961 | { | |
962 | bufferlist bl; | |
963 | int r = mon->store->get(MGR_METADATA_PREFIX, name, bl); | |
964 | if (r < 0) | |
965 | return r; | |
966 | try { | |
967 | bufferlist::iterator p = bl.begin(); | |
968 | ::decode(m, p); | |
969 | } | |
970 | catch (buffer::error& e) { | |
971 | if (err) | |
972 | *err << "mgr." << name << " metadata is corrupt"; | |
973 | return -EIO; | |
974 | } | |
975 | return 0; | |
976 | } | |
977 | ||
978 | void MgrMonitor::count_metadata(const string& field, std::map<string,int> *out) | |
979 | { | |
980 | std::set<string> ls = map.get_all_names(); | |
981 | for (auto& name : ls) { | |
982 | std::map<string,string> meta; | |
983 | load_metadata(name, meta, nullptr); | |
984 | auto p = meta.find(field); | |
985 | if (p == meta.end()) { | |
986 | (*out)["unknown"]++; | |
987 | } else { | |
988 | (*out)[p->second]++; | |
989 | } | |
990 | } | |
991 | } | |
992 | ||
993 | void MgrMonitor::count_metadata(const string& field, Formatter *f) | |
994 | { | |
995 | std::map<string,int> by_val; | |
996 | count_metadata(field, &by_val); | |
997 | f->open_object_section(field.c_str()); | |
998 | for (auto& p : by_val) { | |
999 | f->dump_int(p.first.c_str(), p.second); | |
1000 | } | |
1001 | f->close_section(); | |
1002 | } | |
1003 | ||
1004 | int MgrMonitor::dump_metadata(const string& name, Formatter *f, ostream *err) | |
1005 | { | |
1006 | std::map<string,string> m; | |
1007 | if (int r = load_metadata(name, m, err)) | |
1008 | return r; | |
1009 | for (auto& p : m) { | |
1010 | f->dump_string(p.first.c_str(), p.second); | |
1011 | } | |
1012 | return 0; | |
1013 | } | |
31f18b77 | 1014 | |
d2e6a577 FG |
1015 | const std::vector<MonCommand> &MgrMonitor::get_command_descs() const |
1016 | { | |
1017 | if (command_descs.empty()) { | |
1018 | // must have just upgraded; fallback to static commands | |
1019 | return mgr_commands; | |
1020 | } else { | |
1021 | return command_descs; | |
1022 | } | |
1023 | } |