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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) 2004-2006 Sage Weil <sage@newdream.net> | |
7 | * | |
8 | * This is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU Lesser General Public | |
10 | * License version 2.1, as published by the Free Software | |
11 | * Foundation. See file COPYING. | |
12 | * | |
13 | */ | |
14 | ||
11fdf7f2 | 15 | #include <regex> |
7c673cae FG |
16 | #include <sstream> |
17 | #include <boost/utility.hpp> | |
18 | ||
19 | #include "MDSMonitor.h" | |
20 | #include "FSCommands.h" | |
21 | #include "Monitor.h" | |
22 | #include "MonitorDBStore.h" | |
23 | #include "OSDMonitor.h" | |
7c673cae FG |
24 | |
25 | #include "common/strtol.h" | |
26 | #include "common/perf_counters.h" | |
27 | #include "common/config.h" | |
28 | #include "common/cmdparse.h" | |
29 | #include "messages/MMDSMap.h" | |
30 | #include "messages/MFSMap.h" | |
31 | #include "messages/MFSMapUser.h" | |
32 | #include "messages/MMDSLoadTargets.h" | |
33 | #include "messages/MMonCommand.h" | |
34 | #include "messages/MGenericMessage.h" | |
35 | ||
11fdf7f2 | 36 | #include "include/ceph_assert.h" |
7c673cae FG |
37 | #include "include/str_list.h" |
38 | #include "include/stringify.h" | |
39 | #include "mds/mdstypes.h" | |
40 | #include "Session.h" | |
41 | ||
42 | #define dout_subsys ceph_subsys_mon | |
43 | #undef dout_prefix | |
28e407b8 AA |
44 | #define dout_prefix _prefix(_dout, mon, get_fsmap()) |
45 | static ostream& _prefix(std::ostream *_dout, Monitor *mon, const FSMap& fsmap) { | |
7c673cae FG |
46 | return *_dout << "mon." << mon->name << "@" << mon->rank |
47 | << "(" << mon->get_state_name() | |
48 | << ").mds e" << fsmap.get_epoch() << " "; | |
49 | } | |
50 | ||
3efd9988 FG |
51 | static const string MDS_METADATA_PREFIX("mds_metadata"); |
52 | static const string MDS_HEALTH_PREFIX("mds_health"); | |
53 | ||
54 | ||
7c673cae FG |
55 | /* |
56 | * Specialized implementation of cmd_getval to allow us to parse | |
57 | * out strongly-typedef'd types | |
58 | */ | |
59 | template<> bool cmd_getval(CephContext *cct, const cmdmap_t& cmdmap, | |
31f18b77 | 60 | const std::string& k, mds_gid_t &val) |
7c673cae FG |
61 | { |
62 | return cmd_getval(cct, cmdmap, k, (int64_t&)val); | |
63 | } | |
64 | ||
65 | template<> bool cmd_getval(CephContext *cct, const cmdmap_t& cmdmap, | |
31f18b77 | 66 | const std::string& k, mds_rank_t &val) |
7c673cae FG |
67 | { |
68 | return cmd_getval(cct, cmdmap, k, (int64_t&)val); | |
69 | } | |
70 | ||
71 | template<> bool cmd_getval(CephContext *cct, const cmdmap_t& cmdmap, | |
31f18b77 | 72 | const std::string& k, MDSMap::DaemonState &val) |
7c673cae FG |
73 | { |
74 | return cmd_getval(cct, cmdmap, k, (int64_t&)val); | |
75 | } | |
76 | ||
7c673cae FG |
77 | // my methods |
78 | ||
11fdf7f2 TL |
79 | template <int dblV> |
80 | void MDSMonitor::print_map(const FSMap& m) | |
7c673cae | 81 | { |
11fdf7f2 | 82 | dout(dblV) << "print_map\n"; |
7c673cae FG |
83 | m.print(*_dout); |
84 | *_dout << dendl; | |
85 | } | |
86 | ||
87 | // service methods | |
88 | void MDSMonitor::create_initial() | |
89 | { | |
90 | dout(10) << "create_initial" << dendl; | |
91 | } | |
92 | ||
11fdf7f2 | 93 | void MDSMonitor::get_store_prefixes(std::set<string>& s) const |
3efd9988 FG |
94 | { |
95 | s.insert(service_name); | |
96 | s.insert(MDS_METADATA_PREFIX); | |
97 | s.insert(MDS_HEALTH_PREFIX); | |
98 | } | |
7c673cae FG |
99 | |
100 | void MDSMonitor::update_from_paxos(bool *need_bootstrap) | |
101 | { | |
102 | version_t version = get_last_committed(); | |
28e407b8 | 103 | if (version == get_fsmap().epoch) |
7c673cae FG |
104 | return; |
105 | ||
106 | dout(10) << __func__ << " version " << version | |
28e407b8 | 107 | << ", my e " << get_fsmap().epoch << dendl; |
11fdf7f2 | 108 | ceph_assert(version > get_fsmap().epoch); |
7c673cae | 109 | |
224ce89b WB |
110 | load_health(); |
111 | ||
7c673cae FG |
112 | // read and decode |
113 | bufferlist fsmap_bl; | |
114 | fsmap_bl.clear(); | |
115 | int err = get_version(version, fsmap_bl); | |
11fdf7f2 | 116 | ceph_assert(err == 0); |
7c673cae | 117 | |
11fdf7f2 | 118 | ceph_assert(fsmap_bl.length() > 0); |
7c673cae | 119 | dout(10) << __func__ << " got " << version << dendl; |
28e407b8 | 120 | PaxosFSMap::decode(fsmap_bl); |
7c673cae FG |
121 | |
122 | // new map | |
91327a77 | 123 | dout(0) << "new map" << dendl; |
11fdf7f2 TL |
124 | print_map<0>(get_fsmap()); |
125 | if (!g_conf()->mon_mds_skip_sanity) { | |
28e407b8 | 126 | get_fsmap().sanity(); |
7c673cae FG |
127 | } |
128 | ||
129 | check_subs(); | |
7c673cae FG |
130 | } |
131 | ||
132 | void MDSMonitor::init() | |
133 | { | |
134 | (void)load_metadata(pending_metadata); | |
135 | } | |
136 | ||
137 | void MDSMonitor::create_pending() | |
138 | { | |
28e407b8 | 139 | auto &fsmap = PaxosFSMap::create_pending(); |
7c673cae | 140 | |
3efd9988 | 141 | if (mon->osdmon()->is_readable()) { |
28e407b8 AA |
142 | const auto &osdmap = mon->osdmon()->osdmap; |
143 | fsmap.sanitize([&osdmap](int64_t pool){return osdmap.have_pg_pool(pool);}); | |
3efd9988 FG |
144 | } |
145 | ||
28e407b8 | 146 | dout(10) << "create_pending e" << fsmap.epoch << dendl; |
7c673cae FG |
147 | } |
148 | ||
149 | void MDSMonitor::encode_pending(MonitorDBStore::TransactionRef t) | |
150 | { | |
28e407b8 AA |
151 | auto &pending = get_pending_fsmap_writeable(); |
152 | auto &epoch = pending.epoch; | |
7c673cae | 153 | |
28e407b8 | 154 | dout(10) << "encode_pending e" << epoch << dendl; |
7c673cae FG |
155 | |
156 | // print map iff 'debug mon = 30' or higher | |
11fdf7f2 TL |
157 | print_map<30>(pending); |
158 | if (!g_conf()->mon_mds_skip_sanity) { | |
28e407b8 | 159 | pending.sanity(); |
7c673cae FG |
160 | } |
161 | ||
162 | // Set 'modified' on maps modified this epoch | |
28e407b8 AA |
163 | for (auto &p : pending.filesystems) { |
164 | if (p.second->mds_map.epoch == epoch) { | |
165 | p.second->mds_map.modified = ceph_clock_now(); | |
7c673cae FG |
166 | } |
167 | } | |
168 | ||
169 | // apply to paxos | |
11fdf7f2 | 170 | ceph_assert(get_last_committed() + 1 == pending.epoch); |
28e407b8 AA |
171 | bufferlist pending_bl; |
172 | pending.encode(pending_bl, mon->get_quorum_con_features()); | |
7c673cae FG |
173 | |
174 | /* put everything in the transaction */ | |
28e407b8 AA |
175 | put_version(t, pending.epoch, pending_bl); |
176 | put_last_committed(t, pending.epoch); | |
7c673cae FG |
177 | |
178 | // Encode MDSHealth data | |
179 | for (std::map<uint64_t, MDSHealth>::iterator i = pending_daemon_health.begin(); | |
180 | i != pending_daemon_health.end(); ++i) { | |
181 | bufferlist bl; | |
182 | i->second.encode(bl); | |
183 | t->put(MDS_HEALTH_PREFIX, stringify(i->first), bl); | |
184 | } | |
185 | ||
186 | for (std::set<uint64_t>::iterator i = pending_daemon_health_rm.begin(); | |
187 | i != pending_daemon_health_rm.end(); ++i) { | |
188 | t->erase(MDS_HEALTH_PREFIX, stringify(*i)); | |
189 | } | |
190 | pending_daemon_health_rm.clear(); | |
1adf2230 | 191 | remove_from_metadata(pending, t); |
224ce89b WB |
192 | |
193 | // health | |
194 | health_check_map_t new_checks; | |
28e407b8 | 195 | const auto &info_map = pending.get_mds_info(); |
224ce89b WB |
196 | for (const auto &i : info_map) { |
197 | const auto &gid = i.first; | |
198 | const auto &info = i.second; | |
199 | if (pending_daemon_health_rm.count(gid)) { | |
200 | continue; | |
201 | } | |
202 | MDSHealth health; | |
203 | auto p = pending_daemon_health.find(gid); | |
204 | if (p != pending_daemon_health.end()) { | |
205 | health = p->second; | |
206 | } else { | |
207 | bufferlist bl; | |
208 | mon->store->get(MDS_HEALTH_PREFIX, stringify(gid), bl); | |
209 | if (!bl.length()) { | |
210 | derr << "Missing health data for MDS " << gid << dendl; | |
211 | continue; | |
212 | } | |
11fdf7f2 | 213 | auto bl_i = bl.cbegin(); |
224ce89b WB |
214 | health.decode(bl_i); |
215 | } | |
216 | for (const auto &metric : health.metrics) { | |
d2e6a577 | 217 | const int rank = info.rank; |
224ce89b WB |
218 | health_check_t *check = &new_checks.get_or_add( |
219 | mds_metric_name(metric.type), | |
220 | metric.sev, | |
221 | mds_metric_summary(metric.type)); | |
222 | ostringstream ss; | |
223 | ss << "mds" << info.name << "(mds." << rank << "): " << metric.message; | |
28e407b8 AA |
224 | bool first = true; |
225 | for (auto &p : metric.metadata) { | |
226 | if (first) { | |
227 | ss << " "; | |
228 | } else { | |
224ce89b | 229 | ss << ", "; |
28e407b8 AA |
230 | } |
231 | ss << p.first << ": " << p.second; | |
232 | first = false; | |
224ce89b WB |
233 | } |
234 | check->detail.push_back(ss.str()); | |
235 | } | |
236 | } | |
28e407b8 | 237 | pending.get_health_checks(&new_checks); |
224ce89b | 238 | for (auto& p : new_checks.checks) { |
11fdf7f2 | 239 | p.second.summary = std::regex_replace( |
224ce89b | 240 | p.second.summary, |
11fdf7f2 | 241 | std::regex("%num%"), |
224ce89b | 242 | stringify(p.second.detail.size())); |
11fdf7f2 | 243 | p.second.summary = std::regex_replace( |
224ce89b | 244 | p.second.summary, |
11fdf7f2 | 245 | std::regex("%plurals%"), |
224ce89b | 246 | p.second.detail.size() > 1 ? "s" : ""); |
11fdf7f2 | 247 | p.second.summary = std::regex_replace( |
224ce89b | 248 | p.second.summary, |
11fdf7f2 | 249 | std::regex("%isorare%"), |
224ce89b | 250 | p.second.detail.size() > 1 ? "are" : "is"); |
11fdf7f2 | 251 | p.second.summary = std::regex_replace( |
181888fb | 252 | p.second.summary, |
11fdf7f2 | 253 | std::regex("%hasorhave%"), |
181888fb | 254 | p.second.detail.size() > 1 ? "have" : "has"); |
224ce89b WB |
255 | } |
256 | encode_health(new_checks, t); | |
7c673cae FG |
257 | } |
258 | ||
11fdf7f2 | 259 | version_t MDSMonitor::get_trim_to() const |
7c673cae FG |
260 | { |
261 | version_t floor = 0; | |
11fdf7f2 TL |
262 | if (g_conf()->mon_mds_force_trim_to > 0 && |
263 | g_conf()->mon_mds_force_trim_to < (int)get_last_committed()) { | |
264 | floor = g_conf()->mon_mds_force_trim_to; | |
7c673cae FG |
265 | dout(10) << __func__ << " explicit mon_mds_force_trim_to = " |
266 | << floor << dendl; | |
267 | } | |
268 | ||
11fdf7f2 | 269 | unsigned max = g_conf()->mon_max_mdsmap_epochs; |
7c673cae FG |
270 | version_t last = get_last_committed(); |
271 | ||
272 | if (last - get_first_committed() > max && floor < last - max) | |
273 | return last - max; | |
274 | return floor; | |
275 | } | |
276 | ||
7c673cae FG |
277 | bool MDSMonitor::preprocess_query(MonOpRequestRef op) |
278 | { | |
279 | op->mark_mdsmon_event(__func__); | |
280 | PaxosServiceMessage *m = static_cast<PaxosServiceMessage*>(op->get_req()); | |
11fdf7f2 TL |
281 | dout(10) << "preprocess_query " << *m << " from " << m->get_orig_source() |
282 | << " " << m->get_orig_source_addrs() << dendl; | |
7c673cae FG |
283 | |
284 | switch (m->get_type()) { | |
285 | ||
286 | case MSG_MDS_BEACON: | |
287 | return preprocess_beacon(op); | |
288 | ||
289 | case MSG_MON_COMMAND: | |
f64942e4 AA |
290 | try { |
291 | return preprocess_command(op); | |
11fdf7f2 | 292 | } catch (const bad_cmd_get& e) { |
f64942e4 AA |
293 | bufferlist bl; |
294 | mon->reply_command(op, -EINVAL, e.what(), bl, get_last_committed()); | |
295 | return true; | |
296 | } | |
7c673cae FG |
297 | |
298 | case MSG_MDS_OFFLOAD_TARGETS: | |
299 | return preprocess_offload_targets(op); | |
300 | ||
301 | default: | |
302 | ceph_abort(); | |
303 | return true; | |
304 | } | |
305 | } | |
306 | ||
307 | void MDSMonitor::_note_beacon(MMDSBeacon *m) | |
308 | { | |
309 | mds_gid_t gid = mds_gid_t(m->get_global_id()); | |
310 | version_t seq = m->get_seq(); | |
311 | ||
91327a77 | 312 | dout(5) << "_note_beacon " << *m << " noting time" << dendl; |
1adf2230 AA |
313 | auto &beacon = last_beacon[gid]; |
314 | beacon.stamp = mono_clock::now(); | |
315 | beacon.seq = seq; | |
7c673cae FG |
316 | } |
317 | ||
318 | bool MDSMonitor::preprocess_beacon(MonOpRequestRef op) | |
319 | { | |
320 | op->mark_mdsmon_event(__func__); | |
321 | MMDSBeacon *m = static_cast<MMDSBeacon*>(op->get_req()); | |
322 | MDSMap::DaemonState state = m->get_state(); | |
323 | mds_gid_t gid = m->get_global_id(); | |
324 | version_t seq = m->get_seq(); | |
325 | MDSMap::mds_info_t info; | |
326 | epoch_t effective_epoch = 0; | |
327 | ||
1adf2230 | 328 | const auto &fsmap = get_fsmap(); |
28e407b8 | 329 | |
7c673cae | 330 | // check privileges, ignore if fails |
11fdf7f2 TL |
331 | MonSession *session = op->get_session(); |
332 | if (!session) | |
333 | goto ignore; | |
7c673cae FG |
334 | if (!session->is_capable("mds", MON_CAP_X)) { |
335 | dout(0) << "preprocess_beacon got MMDSBeacon from entity with insufficient privileges " | |
336 | << session->caps << dendl; | |
337 | goto ignore; | |
338 | } | |
339 | ||
340 | if (m->get_fsid() != mon->monmap->fsid) { | |
341 | dout(0) << "preprocess_beacon on fsid " << m->get_fsid() << " != " << mon->monmap->fsid << dendl; | |
342 | goto ignore; | |
343 | } | |
344 | ||
91327a77 | 345 | dout(5) << "preprocess_beacon " << *m |
11fdf7f2 TL |
346 | << " from " << m->get_orig_source() |
347 | << " " << m->get_orig_source_addrs() | |
7c673cae FG |
348 | << " " << m->get_compat() |
349 | << dendl; | |
350 | ||
351 | // make sure the address has a port | |
352 | if (m->get_orig_source_addr().get_port() == 0) { | |
353 | dout(1) << " ignoring boot message without a port" << dendl; | |
354 | goto ignore; | |
355 | } | |
356 | ||
357 | // check compat | |
358 | if (!m->get_compat().writeable(fsmap.compat)) { | |
11fdf7f2 TL |
359 | dout(1) << " mds " << m->get_orig_source() |
360 | << " " << m->get_orig_source_addrs() | |
361 | << " can't write to fsmap " << fsmap.compat << dendl; | |
7c673cae FG |
362 | goto ignore; |
363 | } | |
364 | ||
365 | // fw to leader? | |
28e407b8 | 366 | if (!is_leader()) |
7c673cae FG |
367 | return false; |
368 | ||
369 | // booted, but not in map? | |
28e407b8 | 370 | if (!fsmap.gid_exists(gid)) { |
7c673cae FG |
371 | if (state != MDSMap::STATE_BOOT) { |
372 | dout(7) << "mds_beacon " << *m << " is not in fsmap (state " | |
373 | << ceph_mds_state_name(state) << ")" << dendl; | |
374 | ||
1adf2230 AA |
375 | /* We can't send an MDSMap this MDS was a part of because we no longer |
376 | * know which FS it was part of. Nor does this matter. Sending an empty | |
377 | * MDSMap is sufficient for getting the MDS to respawn. | |
378 | */ | |
7c673cae FG |
379 | MDSMap null_map; |
380 | null_map.epoch = fsmap.epoch; | |
381 | null_map.compat = fsmap.compat; | |
11fdf7f2 TL |
382 | auto m = MMDSMap::create(mon->monmap->fsid, null_map); |
383 | mon->send_reply(op, m.detach()); | |
7c673cae FG |
384 | return true; |
385 | } else { | |
386 | return false; // not booted yet. | |
387 | } | |
388 | } | |
389 | dout(10) << __func__ << ": GID exists in map: " << gid << dendl; | |
28e407b8 | 390 | info = fsmap.get_info_gid(gid); |
7c673cae FG |
391 | |
392 | // old seq? | |
393 | if (info.state_seq > seq) { | |
394 | dout(7) << "mds_beacon " << *m << " has old seq, ignoring" << dendl; | |
395 | goto ignore; | |
396 | } | |
397 | ||
398 | // Work out the latest epoch that this daemon should have seen | |
399 | { | |
28e407b8 | 400 | fs_cluster_id_t fscid = fsmap.mds_roles.at(gid); |
7c673cae | 401 | if (fscid == FS_CLUSTER_ID_NONE) { |
28e407b8 | 402 | effective_epoch = fsmap.standby_epochs.at(gid); |
7c673cae | 403 | } else { |
28e407b8 | 404 | effective_epoch = fsmap.get_filesystem(fscid)->mds_map.epoch; |
7c673cae FG |
405 | } |
406 | if (effective_epoch != m->get_last_epoch_seen()) { | |
407 | dout(10) << "mds_beacon " << *m | |
408 | << " ignoring requested state, because mds hasn't seen latest map" << dendl; | |
409 | goto reply; | |
410 | } | |
411 | } | |
412 | ||
413 | if (info.laggy()) { | |
414 | _note_beacon(m); | |
415 | return false; // no longer laggy, need to update map. | |
416 | } | |
417 | if (state == MDSMap::STATE_BOOT) { | |
418 | // ignore, already booted. | |
419 | goto ignore; | |
420 | } | |
421 | // is there a state change here? | |
422 | if (info.state != state) { | |
423 | // legal state change? | |
424 | if ((info.state == MDSMap::STATE_STANDBY || | |
425 | info.state == MDSMap::STATE_STANDBY_REPLAY) && state > 0) { | |
426 | dout(10) << "mds_beacon mds can't activate itself (" << ceph_mds_state_name(info.state) | |
427 | << " -> " << ceph_mds_state_name(state) << ")" << dendl; | |
428 | goto reply; | |
429 | } | |
430 | ||
431 | if ((state == MDSMap::STATE_STANDBY || state == MDSMap::STATE_STANDBY_REPLAY) | |
432 | && info.rank != MDS_RANK_NONE) | |
433 | { | |
434 | dout(4) << "mds_beacon MDS can't go back into standby after taking rank: " | |
435 | "held rank " << info.rank << " while requesting state " | |
436 | << ceph_mds_state_name(state) << dendl; | |
437 | goto reply; | |
438 | } | |
439 | ||
440 | _note_beacon(m); | |
441 | return false; | |
442 | } | |
443 | ||
444 | // Comparing known daemon health with m->get_health() | |
445 | // and return false (i.e. require proposal) if they | |
446 | // do not match, to update our stored | |
447 | if (!(pending_daemon_health[gid] == m->get_health())) { | |
91327a77 | 448 | dout(10) << __func__ << " health metrics for gid " << gid << " were updated" << dendl; |
7c673cae FG |
449 | _note_beacon(m); |
450 | return false; | |
451 | } | |
452 | ||
453 | reply: | |
454 | // note time and reply | |
11fdf7f2 | 455 | ceph_assert(effective_epoch > 0); |
7c673cae | 456 | _note_beacon(m); |
11fdf7f2 TL |
457 | { |
458 | auto beacon = MMDSBeacon::create(mon->monmap->fsid, | |
459 | m->get_global_id(), m->get_name(), effective_epoch, | |
460 | state, seq, CEPH_FEATURES_SUPPORTED_DEFAULT); | |
461 | mon->send_reply(op, beacon.detach()); | |
462 | } | |
7c673cae FG |
463 | return true; |
464 | ||
465 | ignore: | |
466 | // I won't reply this beacon, drop it. | |
467 | mon->no_reply(op); | |
468 | return true; | |
469 | } | |
470 | ||
471 | bool MDSMonitor::preprocess_offload_targets(MonOpRequestRef op) | |
472 | { | |
473 | op->mark_mdsmon_event(__func__); | |
474 | MMDSLoadTargets *m = static_cast<MMDSLoadTargets*>(op->get_req()); | |
475 | dout(10) << "preprocess_offload_targets " << *m << " from " << m->get_orig_source() << dendl; | |
28e407b8 | 476 | |
1adf2230 | 477 | const auto &fsmap = get_fsmap(); |
7c673cae FG |
478 | |
479 | // check privileges, ignore message if fails | |
11fdf7f2 | 480 | MonSession *session = op->get_session(); |
7c673cae | 481 | if (!session) |
1adf2230 | 482 | goto ignore; |
7c673cae FG |
483 | if (!session->is_capable("mds", MON_CAP_X)) { |
484 | dout(0) << "preprocess_offload_targets got MMDSLoadTargets from entity with insufficient caps " | |
485 | << session->caps << dendl; | |
1adf2230 | 486 | goto ignore; |
7c673cae FG |
487 | } |
488 | ||
489 | if (fsmap.gid_exists(m->global_id) && | |
490 | m->targets == fsmap.get_info_gid(m->global_id).export_targets) | |
1adf2230 | 491 | goto ignore; |
7c673cae FG |
492 | |
493 | return false; | |
494 | ||
1adf2230 AA |
495 | ignore: |
496 | mon->no_reply(op); | |
7c673cae FG |
497 | return true; |
498 | } | |
499 | ||
500 | ||
501 | bool MDSMonitor::prepare_update(MonOpRequestRef op) | |
502 | { | |
503 | op->mark_mdsmon_event(__func__); | |
504 | PaxosServiceMessage *m = static_cast<PaxosServiceMessage*>(op->get_req()); | |
505 | dout(7) << "prepare_update " << *m << dendl; | |
506 | ||
507 | switch (m->get_type()) { | |
508 | ||
509 | case MSG_MDS_BEACON: | |
510 | return prepare_beacon(op); | |
511 | ||
512 | case MSG_MON_COMMAND: | |
f64942e4 AA |
513 | try { |
514 | return prepare_command(op); | |
11fdf7f2 | 515 | } catch (const bad_cmd_get& e) { |
f64942e4 AA |
516 | bufferlist bl; |
517 | mon->reply_command(op, -EINVAL, e.what(), bl, get_last_committed()); | |
518 | return true; | |
519 | } | |
7c673cae FG |
520 | |
521 | case MSG_MDS_OFFLOAD_TARGETS: | |
522 | return prepare_offload_targets(op); | |
523 | ||
524 | default: | |
525 | ceph_abort(); | |
526 | } | |
527 | ||
528 | return true; | |
529 | } | |
530 | ||
531 | bool MDSMonitor::prepare_beacon(MonOpRequestRef op) | |
532 | { | |
533 | op->mark_mdsmon_event(__func__); | |
534 | MMDSBeacon *m = static_cast<MMDSBeacon*>(op->get_req()); | |
535 | // -- this is an update -- | |
11fdf7f2 TL |
536 | dout(12) << "prepare_beacon " << *m << " from " << m->get_orig_source() |
537 | << " " << m->get_orig_source_addrs() << dendl; | |
538 | entity_addrvec_t addrs = m->get_orig_source_addrs(); | |
7c673cae FG |
539 | mds_gid_t gid = m->get_global_id(); |
540 | MDSMap::DaemonState state = m->get_state(); | |
541 | version_t seq = m->get_seq(); | |
542 | ||
28e407b8 AA |
543 | auto &pending = get_pending_fsmap_writeable(); |
544 | ||
91327a77 | 545 | dout(15) << __func__ << " got health from gid " << gid << " with " << m->get_health().metrics.size() << " metrics." << dendl; |
7c673cae FG |
546 | |
547 | // Calculate deltas of health metrics created and removed | |
548 | // Do this by type rather than MDSHealthMetric equality, because messages can | |
549 | // change a lot when they include e.g. a number of items. | |
550 | const auto &old_health = pending_daemon_health[gid].metrics; | |
551 | const auto &new_health = m->get_health().metrics; | |
552 | ||
553 | std::set<mds_metric_t> old_types; | |
554 | for (const auto &i : old_health) { | |
555 | old_types.insert(i.type); | |
556 | } | |
557 | ||
558 | std::set<mds_metric_t> new_types; | |
559 | for (const auto &i : new_health) { | |
560 | new_types.insert(i.type); | |
561 | } | |
562 | ||
563 | for (const auto &new_metric: new_health) { | |
564 | if (old_types.count(new_metric.type) == 0) { | |
11fdf7f2 | 565 | dout(10) << "MDS health message (" << m->get_orig_source() |
28e407b8 | 566 | << "): " << new_metric.sev << " " << new_metric.message << dendl; |
7c673cae FG |
567 | } |
568 | } | |
569 | ||
570 | // Log the disappearance of health messages at INFO | |
571 | for (const auto &old_metric : old_health) { | |
572 | if (new_types.count(old_metric.type) == 0) { | |
573 | mon->clog->info() << "MDS health message cleared (" | |
11fdf7f2 | 574 | << m->get_orig_source() << "): " << old_metric.message; |
7c673cae FG |
575 | } |
576 | } | |
577 | ||
578 | // Store health | |
579 | pending_daemon_health[gid] = m->get_health(); | |
580 | ||
581 | // boot? | |
582 | if (state == MDSMap::STATE_BOOT) { | |
583 | // zap previous instance of this name? | |
11fdf7f2 | 584 | if (g_conf()->mds_enforce_unique_name) { |
7c673cae | 585 | bool failed_mds = false; |
28e407b8 | 586 | while (mds_gid_t existing = pending.find_mds_gid_by_name(m->get_name())) { |
7c673cae FG |
587 | if (!mon->osdmon()->is_writeable()) { |
588 | mon->osdmon()->wait_for_writeable(op, new C_RetryMessage(this, op)); | |
589 | return false; | |
590 | } | |
d2e6a577 | 591 | const MDSMap::mds_info_t &existing_info = |
28e407b8 | 592 | pending.get_info_gid(existing); |
d2e6a577 | 593 | mon->clog->info() << existing_info.human_name() << " restarted"; |
1adf2230 | 594 | fail_mds_gid(pending, existing); |
7c673cae FG |
595 | failed_mds = true; |
596 | } | |
597 | if (failed_mds) { | |
11fdf7f2 | 598 | ceph_assert(mon->osdmon()->is_writeable()); |
7c673cae FG |
599 | request_proposal(mon->osdmon()); |
600 | } | |
601 | } | |
602 | ||
603 | // Add this daemon to the map | |
28e407b8 | 604 | if (pending.mds_roles.count(gid) == 0) { |
7c673cae FG |
605 | MDSMap::mds_info_t new_info; |
606 | new_info.global_id = gid; | |
607 | new_info.name = m->get_name(); | |
11fdf7f2 | 608 | new_info.addrs = addrs; |
7c673cae FG |
609 | new_info.mds_features = m->get_mds_features(); |
610 | new_info.state = MDSMap::STATE_STANDBY; | |
611 | new_info.state_seq = seq; | |
28e407b8 | 612 | pending.insert(new_info); |
7c673cae FG |
613 | } |
614 | ||
7c673cae | 615 | // initialize the beacon timer |
1adf2230 AA |
616 | auto &beacon = last_beacon[gid]; |
617 | beacon.stamp = mono_clock::now(); | |
618 | beacon.seq = seq; | |
7c673cae FG |
619 | |
620 | // new incompat? | |
28e407b8 AA |
621 | if (!pending.compat.writeable(m->get_compat())) { |
622 | dout(10) << " fsmap " << pending.compat | |
7c673cae FG |
623 | << " can't write to new mds' " << m->get_compat() |
624 | << ", updating fsmap and killing old mds's" | |
625 | << dendl; | |
28e407b8 | 626 | pending.update_compat(m->get_compat()); |
7c673cae FG |
627 | } |
628 | ||
629 | update_metadata(m->get_global_id(), m->get_sys_info()); | |
630 | } else { | |
631 | // state update | |
91327a77 AA |
632 | |
633 | if (!pending.gid_exists(gid)) { | |
634 | /* gid has been removed from pending, send null map */ | |
635 | dout(5) << "mds_beacon " << *m << " is not in fsmap (state " | |
636 | << ceph_mds_state_name(state) << ")" << dendl; | |
637 | ||
638 | /* We can't send an MDSMap this MDS was a part of because we no longer | |
639 | * know which FS it was part of. Nor does this matter. Sending an empty | |
640 | * MDSMap is sufficient for getting the MDS to respawn. | |
641 | */ | |
642 | wait_for_finished_proposal(op, new FunctionContext([op, this](int r){ | |
643 | if (r >= 0) { | |
644 | const auto& fsmap = get_fsmap(); | |
645 | MDSMap null_map; | |
646 | null_map.epoch = fsmap.epoch; | |
647 | null_map.compat = fsmap.compat; | |
11fdf7f2 TL |
648 | auto m = MMDSMap::create(mon->monmap->fsid, null_map); |
649 | mon->send_reply(op, m.detach()); | |
91327a77 AA |
650 | } else { |
651 | dispatch(op); // try again | |
652 | } | |
653 | })); | |
654 | return true; | |
655 | } | |
656 | ||
11fdf7f2 | 657 | const auto& info = pending.get_info_gid(gid); |
f64942e4 AA |
658 | if (info.state == MDSMap::STATE_STOPPING && |
659 | state != MDSMap::STATE_STOPPING && | |
660 | state != MDSMap::STATE_STOPPED) { | |
7c673cae FG |
661 | // we can't transition to any other states from STOPPING |
662 | dout(0) << "got beacon for MDS in STATE_STOPPING, ignoring requested state change" | |
663 | << dendl; | |
664 | _note_beacon(m); | |
665 | return true; | |
666 | } | |
667 | ||
668 | if (info.laggy()) { | |
11fdf7f2 TL |
669 | dout(1) << "prepare_beacon clearing laggy flag on " << addrs << dendl; |
670 | pending.modify_daemon(info.global_id, [](auto& info) | |
7c673cae | 671 | { |
11fdf7f2 | 672 | info.clear_laggy(); |
7c673cae FG |
673 | } |
674 | ); | |
675 | } | |
676 | ||
91327a77 | 677 | dout(5) << "prepare_beacon mds." << info.rank |
7c673cae FG |
678 | << " " << ceph_mds_state_name(info.state) |
679 | << " -> " << ceph_mds_state_name(state) | |
7c673cae FG |
680 | << dendl; |
681 | if (state == MDSMap::STATE_STOPPED) { | |
28e407b8 AA |
682 | const auto fscid = pending.mds_roles.at(gid); |
683 | const auto &fs = pending.get_filesystem(fscid); | |
181888fb | 684 | |
d2e6a577 | 685 | mon->clog->info() << info.human_name() << " finished " |
11fdf7f2 | 686 | << "stopping rank " << info.rank << " in filesystem " |
d2e6a577 | 687 | << fs->mds_map.fs_name << " (now has " |
181888fb | 688 | << fs->mds_map.get_num_in_mds() - 1 << " ranks)"; |
d2e6a577 | 689 | |
28e407b8 | 690 | auto erased = pending.stop(gid); |
7c673cae FG |
691 | erased.push_back(gid); |
692 | ||
693 | for (const auto &erased_gid : erased) { | |
694 | last_beacon.erase(erased_gid); | |
695 | if (pending_daemon_health.count(erased_gid)) { | |
696 | pending_daemon_health.erase(erased_gid); | |
697 | pending_daemon_health_rm.insert(erased_gid); | |
698 | } | |
699 | } | |
d2e6a577 FG |
700 | |
701 | ||
7c673cae FG |
702 | } else if (state == MDSMap::STATE_DAMAGED) { |
703 | if (!mon->osdmon()->is_writeable()) { | |
91327a77 | 704 | dout(1) << __func__ << ": DAMAGED from rank " << info.rank |
7c673cae FG |
705 | << " waiting for osdmon writeable to blacklist it" << dendl; |
706 | mon->osdmon()->wait_for_writeable(op, new C_RetryMessage(this, op)); | |
707 | return false; | |
708 | } | |
709 | ||
710 | // Record this MDS rank as damaged, so that other daemons | |
711 | // won't try to run it. | |
91327a77 | 712 | dout(0) << __func__ << ": marking rank " |
7c673cae FG |
713 | << info.rank << " damaged" << dendl; |
714 | ||
715 | utime_t until = ceph_clock_now(); | |
11fdf7f2 TL |
716 | until += g_conf().get_val<double>("mon_mds_blacklist_interval"); |
717 | const auto blacklist_epoch = mon->osdmon()->blacklist(info.addrs, until); | |
7c673cae | 718 | request_proposal(mon->osdmon()); |
28e407b8 | 719 | pending.damaged(gid, blacklist_epoch); |
7c673cae FG |
720 | last_beacon.erase(gid); |
721 | ||
722 | // Respond to MDS, so that it knows it can continue to shut down | |
11fdf7f2 | 723 | auto beacon = MMDSBeacon::create( |
7c673cae | 724 | mon->monmap->fsid, m->get_global_id(), |
28e407b8 | 725 | m->get_name(), pending.get_epoch(), state, seq, |
11fdf7f2 TL |
726 | CEPH_FEATURES_SUPPORTED_DEFAULT); |
727 | mon->send_reply(op, beacon.detach()); | |
7c673cae FG |
728 | } else if (state == MDSMap::STATE_DNE) { |
729 | if (!mon->osdmon()->is_writeable()) { | |
91327a77 | 730 | dout(1) << __func__ << ": DNE from rank " << info.rank |
7c673cae FG |
731 | << " waiting for osdmon writeable to blacklist it" << dendl; |
732 | mon->osdmon()->wait_for_writeable(op, new C_RetryMessage(this, op)); | |
733 | return false; | |
734 | } | |
735 | ||
1adf2230 | 736 | fail_mds_gid(pending, gid); |
11fdf7f2 | 737 | ceph_assert(mon->osdmon()->is_writeable()); |
7c673cae FG |
738 | request_proposal(mon->osdmon()); |
739 | ||
740 | // Respond to MDS, so that it knows it can continue to shut down | |
11fdf7f2 TL |
741 | auto beacon = MMDSBeacon::create(mon->monmap->fsid, |
742 | m->get_global_id(), m->get_name(), pending.get_epoch(), state, seq, | |
743 | CEPH_FEATURES_SUPPORTED_DEFAULT); | |
744 | mon->send_reply(op, beacon.detach()); | |
7c673cae FG |
745 | } else if (info.state == MDSMap::STATE_STANDBY && state != info.state) { |
746 | // Standby daemons should never modify their own | |
747 | // state. Reject any attempts to do so. | |
748 | derr << "standby " << gid << " attempted to change state to " | |
749 | << ceph_mds_state_name(state) << ", rejecting" << dendl; | |
750 | return true; | |
751 | } else if (info.state != MDSMap::STATE_STANDBY && state != info.state && | |
752 | !MDSMap::state_transition_valid(info.state, state)) { | |
753 | // Validate state transitions for daemons that hold a rank | |
754 | derr << "daemon " << gid << " (rank " << info.rank << ") " | |
755 | << "reported invalid state transition " | |
756 | << ceph_mds_state_name(info.state) << " -> " | |
757 | << ceph_mds_state_name(state) << dendl; | |
758 | return true; | |
759 | } else { | |
b32b8144 | 760 | if (info.state != MDSMap::STATE_ACTIVE && state == MDSMap::STATE_ACTIVE) { |
28e407b8 AA |
761 | const auto &fscid = pending.mds_roles.at(gid); |
762 | const auto &fs = pending.get_filesystem(fscid); | |
d2e6a577 FG |
763 | mon->clog->info() << info.human_name() << " is now active in " |
764 | << "filesystem " << fs->mds_map.fs_name << " as rank " | |
765 | << info.rank; | |
766 | } | |
b32b8144 FG |
767 | |
768 | // Made it through special cases and validations, record the | |
769 | // daemon's reported state to the FSMap. | |
11fdf7f2 TL |
770 | pending.modify_daemon(gid, [state, seq](auto& info) { |
771 | info.state = state; | |
772 | info.state_seq = seq; | |
b32b8144 | 773 | }); |
7c673cae FG |
774 | } |
775 | } | |
776 | ||
91327a77 | 777 | dout(5) << "prepare_beacon pending map now:" << dendl; |
28e407b8 | 778 | print_map(pending); |
7c673cae FG |
779 | |
780 | wait_for_finished_proposal(op, new FunctionContext([op, this](int r){ | |
781 | if (r >= 0) | |
782 | _updated(op); // success | |
783 | else if (r == -ECANCELED) { | |
784 | mon->no_reply(op); | |
785 | } else { | |
786 | dispatch(op); // try again | |
787 | } | |
788 | })); | |
789 | ||
790 | return true; | |
791 | } | |
792 | ||
793 | bool MDSMonitor::prepare_offload_targets(MonOpRequestRef op) | |
794 | { | |
28e407b8 AA |
795 | auto &pending = get_pending_fsmap_writeable(); |
796 | ||
7c673cae FG |
797 | op->mark_mdsmon_event(__func__); |
798 | MMDSLoadTargets *m = static_cast<MMDSLoadTargets*>(op->get_req()); | |
799 | mds_gid_t gid = m->global_id; | |
28e407b8 | 800 | if (pending.gid_has_rank(gid)) { |
7c673cae | 801 | dout(10) << "prepare_offload_targets " << gid << " " << m->targets << dendl; |
28e407b8 | 802 | pending.update_export_targets(gid, m->targets); |
7c673cae FG |
803 | } else { |
804 | dout(10) << "prepare_offload_targets " << gid << " not in map" << dendl; | |
805 | } | |
91327a77 | 806 | mon->no_reply(op); |
7c673cae FG |
807 | return true; |
808 | } | |
809 | ||
810 | bool MDSMonitor::should_propose(double& delay) | |
811 | { | |
812 | // delegate to PaxosService to assess whether we should propose | |
813 | return PaxosService::should_propose(delay); | |
814 | } | |
815 | ||
816 | void MDSMonitor::_updated(MonOpRequestRef op) | |
817 | { | |
28e407b8 | 818 | const auto &fsmap = get_fsmap(); |
7c673cae FG |
819 | op->mark_mdsmon_event(__func__); |
820 | MMDSBeacon *m = static_cast<MMDSBeacon*>(op->get_req()); | |
821 | dout(10) << "_updated " << m->get_orig_source() << " " << *m << dendl; | |
11fdf7f2 TL |
822 | mon->clog->debug() << m->get_orig_source() << " " |
823 | << m->get_orig_source_addrs() << " " | |
824 | << ceph_mds_state_name(m->get_state()); | |
7c673cae FG |
825 | |
826 | if (m->get_state() == MDSMap::STATE_STOPPED) { | |
827 | // send the map manually (they're out of the map, so they won't get it automatic) | |
828 | MDSMap null_map; | |
829 | null_map.epoch = fsmap.epoch; | |
830 | null_map.compat = fsmap.compat; | |
11fdf7f2 TL |
831 | auto m = MMDSMap::create(mon->monmap->fsid, null_map); |
832 | mon->send_reply(op, m.detach()); | |
7c673cae | 833 | } else { |
11fdf7f2 TL |
834 | auto beacon = MMDSBeacon::create(mon->monmap->fsid, |
835 | m->get_global_id(), m->get_name(), fsmap.get_epoch(), | |
836 | m->get_state(), m->get_seq(), CEPH_FEATURES_SUPPORTED_DEFAULT); | |
837 | mon->send_reply(op, beacon.detach()); | |
7c673cae FG |
838 | } |
839 | } | |
840 | ||
841 | void MDSMonitor::on_active() | |
842 | { | |
843 | tick(); | |
7c673cae | 844 | |
28e407b8 AA |
845 | if (is_leader()) { |
846 | mon->clog->debug() << "fsmap " << get_fsmap(); | |
224ce89b | 847 | } |
7c673cae FG |
848 | } |
849 | ||
7c673cae FG |
850 | void MDSMonitor::dump_info(Formatter *f) |
851 | { | |
852 | f->open_object_section("fsmap"); | |
28e407b8 | 853 | get_fsmap().dump(f); |
7c673cae FG |
854 | f->close_section(); |
855 | ||
856 | f->dump_unsigned("mdsmap_first_committed", get_first_committed()); | |
857 | f->dump_unsigned("mdsmap_last_committed", get_last_committed()); | |
858 | } | |
859 | ||
860 | bool MDSMonitor::preprocess_command(MonOpRequestRef op) | |
861 | { | |
862 | op->mark_mdsmon_event(__func__); | |
863 | MMonCommand *m = static_cast<MMonCommand*>(op->get_req()); | |
864 | int r = -1; | |
865 | bufferlist rdata; | |
866 | stringstream ss, ds; | |
867 | ||
1adf2230 | 868 | const auto &fsmap = get_fsmap(); |
28e407b8 | 869 | |
11fdf7f2 | 870 | cmdmap_t cmdmap; |
7c673cae FG |
871 | if (!cmdmap_from_json(m->cmd, &cmdmap, ss)) { |
872 | // ss has reason for failure | |
873 | string rs = ss.str(); | |
874 | mon->reply_command(op, -EINVAL, rs, rdata, get_last_committed()); | |
875 | return true; | |
876 | } | |
877 | ||
878 | string prefix; | |
879 | cmd_getval(g_ceph_context, cmdmap, "prefix", prefix); | |
880 | string format; | |
881 | cmd_getval(g_ceph_context, cmdmap, "format", format, string("plain")); | |
1adf2230 | 882 | std::unique_ptr<Formatter> f(Formatter::create(format)); |
7c673cae | 883 | |
11fdf7f2 | 884 | MonSession *session = op->get_session(); |
7c673cae FG |
885 | if (!session) { |
886 | mon->reply_command(op, -EACCES, "access denied", rdata, get_last_committed()); | |
887 | return true; | |
888 | } | |
889 | ||
890 | if (prefix == "mds stat") { | |
891 | if (f) { | |
892 | f->open_object_section("mds_stat"); | |
893 | dump_info(f.get()); | |
894 | f->close_section(); | |
895 | f->flush(ds); | |
896 | } else { | |
897 | ds << fsmap; | |
898 | } | |
899 | r = 0; | |
11fdf7f2 TL |
900 | } else if (prefix == "mds ok-to-stop") { |
901 | vector<string> ids; | |
902 | if (!cmd_getval(g_ceph_context, cmdmap, "ids", ids)) { | |
903 | r = -EINVAL; | |
904 | ss << "must specify mds id"; | |
905 | goto out; | |
906 | } | |
907 | if (fsmap.is_any_degraded()) { | |
908 | ss << "one or more filesystems is currently degraded"; | |
909 | r = -EBUSY; | |
910 | goto out; | |
911 | } | |
912 | set<mds_gid_t> stopping; | |
913 | for (auto& id : ids) { | |
914 | ostringstream ess; | |
915 | mds_gid_t gid = gid_from_arg(fsmap, id, ess); | |
916 | if (gid == MDS_GID_NONE) { | |
917 | // the mds doesn't exist, but no file systems are unhappy, so losing it | |
918 | // can't have any effect. | |
919 | continue; | |
920 | } | |
921 | stopping.insert(gid); | |
922 | } | |
923 | set<mds_gid_t> active; | |
924 | set<mds_gid_t> standby; | |
925 | for (auto gid : stopping) { | |
926 | if (fsmap.gid_has_rank(gid)) { | |
927 | // ignore standby-replay daemons (at this level) | |
928 | if (!fsmap.is_standby_replay(gid)) { | |
929 | auto standby = fsmap.get_standby_replay(gid); | |
930 | if (standby == MDS_GID_NONE || | |
931 | stopping.count(standby)) { | |
932 | // no standby-replay, or we're also stopping the standby-replay | |
933 | // for this mds | |
934 | active.insert(gid); | |
935 | } | |
936 | } | |
7c673cae | 937 | } else { |
11fdf7f2 TL |
938 | // net loss of a standby |
939 | standby.insert(gid); | |
7c673cae FG |
940 | } |
941 | } | |
11fdf7f2 TL |
942 | if (fsmap.get_num_standby() - standby.size() < active.size()) { |
943 | r = -EBUSY; | |
944 | ss << "insufficent standby MDS daemons to stop active gids " | |
945 | << stringify(active) | |
946 | << " and/or standby gids " << stringify(standby);; | |
947 | goto out; | |
28e407b8 | 948 | } |
11fdf7f2 TL |
949 | r = 0; |
950 | ss << "should be safe to stop " << ids; | |
7c673cae FG |
951 | } else if (prefix == "fs dump") { |
952 | int64_t epocharg; | |
953 | epoch_t epoch; | |
954 | ||
1adf2230 | 955 | const FSMap *fsmapp = &fsmap; |
28e407b8 | 956 | FSMap dummy; |
7c673cae FG |
957 | if (cmd_getval(g_ceph_context, cmdmap, "epoch", epocharg)) { |
958 | epoch = epocharg; | |
959 | bufferlist b; | |
960 | int err = get_version(epoch, b); | |
961 | if (err == -ENOENT) { | |
7c673cae | 962 | r = -ENOENT; |
28e407b8 | 963 | goto out; |
7c673cae | 964 | } else { |
11fdf7f2 TL |
965 | ceph_assert(err == 0); |
966 | ceph_assert(b.length()); | |
28e407b8 AA |
967 | dummy.decode(b); |
968 | fsmapp = &dummy; | |
7c673cae FG |
969 | } |
970 | } | |
c07f9fc5 | 971 | |
28e407b8 AA |
972 | stringstream ds; |
973 | if (f != NULL) { | |
974 | f->open_object_section("fsmap"); | |
975 | fsmapp->dump(f.get()); | |
976 | f->close_section(); | |
977 | f->flush(ds); | |
978 | r = 0; | |
979 | } else { | |
980 | fsmapp->print(ds); | |
981 | r = 0; | |
7c673cae | 982 | } |
28e407b8 AA |
983 | |
984 | rdata.append(ds); | |
985 | ss << "dumped fsmap epoch " << fsmapp->get_epoch(); | |
7c673cae FG |
986 | } else if (prefix == "mds metadata") { |
987 | if (!f) | |
988 | f.reset(Formatter::create("json-pretty")); | |
989 | ||
990 | string who; | |
991 | bool all = !cmd_getval(g_ceph_context, cmdmap, "who", who); | |
992 | dout(1) << "all = " << all << dendl; | |
993 | if (all) { | |
994 | r = 0; | |
995 | // Dump all MDSs' metadata | |
996 | const auto all_info = fsmap.get_mds_info(); | |
997 | ||
998 | f->open_array_section("mds_metadata"); | |
999 | for(const auto &i : all_info) { | |
1000 | const auto &info = i.second; | |
1001 | ||
1002 | f->open_object_section("mds"); | |
1003 | f->dump_string("name", info.name); | |
1004 | std::ostringstream get_err; | |
1adf2230 | 1005 | r = dump_metadata(fsmap, info.name, f.get(), get_err); |
7c673cae FG |
1006 | if (r == -EINVAL || r == -ENOENT) { |
1007 | // Drop error, list what metadata we do have | |
1008 | dout(1) << get_err.str() << dendl; | |
1009 | r = 0; | |
1010 | } else if (r != 0) { | |
1011 | derr << "Unexpected error reading metadata: " << cpp_strerror(r) | |
1012 | << dendl; | |
1013 | ss << get_err.str(); | |
c07f9fc5 | 1014 | f->close_section(); |
7c673cae FG |
1015 | break; |
1016 | } | |
1017 | f->close_section(); | |
1018 | } | |
1019 | f->close_section(); | |
1020 | } else { | |
1021 | // Dump a single daemon's metadata | |
1022 | f->open_object_section("mds_metadata"); | |
1adf2230 | 1023 | r = dump_metadata(fsmap, who, f.get(), ss); |
7c673cae FG |
1024 | f->close_section(); |
1025 | } | |
1026 | f->flush(ds); | |
31f18b77 FG |
1027 | } else if (prefix == "mds versions") { |
1028 | if (!f) | |
1029 | f.reset(Formatter::create("json-pretty")); | |
1030 | count_metadata("ceph_version", f.get()); | |
1031 | f->flush(ds); | |
1032 | r = 0; | |
1033 | } else if (prefix == "mds count-metadata") { | |
1034 | if (!f) | |
1035 | f.reset(Formatter::create("json-pretty")); | |
1036 | string field; | |
1037 | cmd_getval(g_ceph_context, cmdmap, "property", field); | |
1038 | count_metadata(field, f.get()); | |
1039 | f->flush(ds); | |
1040 | r = 0; | |
7c673cae FG |
1041 | } else if (prefix == "mds compat show") { |
1042 | if (f) { | |
1043 | f->open_object_section("mds_compat"); | |
1044 | fsmap.compat.dump(f.get()); | |
1045 | f->close_section(); | |
1046 | f->flush(ds); | |
1047 | } else { | |
1048 | ds << fsmap.compat; | |
1049 | } | |
1050 | r = 0; | |
1051 | } else if (prefix == "fs get") { | |
1052 | string fs_name; | |
1053 | cmd_getval(g_ceph_context, cmdmap, "fs_name", fs_name); | |
28e407b8 | 1054 | const auto &fs = fsmap.get_filesystem(fs_name); |
7c673cae FG |
1055 | if (fs == nullptr) { |
1056 | ss << "filesystem '" << fs_name << "' not found"; | |
1057 | r = -ENOENT; | |
1058 | } else { | |
1059 | if (f != nullptr) { | |
1060 | f->open_object_section("filesystem"); | |
1061 | fs->dump(f.get()); | |
1062 | f->close_section(); | |
1063 | f->flush(ds); | |
1064 | r = 0; | |
1065 | } else { | |
1066 | fs->print(ds); | |
1067 | r = 0; | |
1068 | } | |
1069 | } | |
1070 | } else if (prefix == "fs ls") { | |
1071 | if (f) { | |
1072 | f->open_array_section("filesystems"); | |
1adf2230 AA |
1073 | for (const auto &p : fsmap.filesystems) { |
1074 | const auto &fs = p.second; | |
1075 | f->open_object_section("filesystem"); | |
1076 | { | |
1077 | const MDSMap &mds_map = fs->mds_map; | |
1078 | f->dump_string("name", mds_map.fs_name); | |
1079 | /* Output both the names and IDs of pools, for use by | |
1080 | * humans and machines respectively */ | |
1081 | f->dump_string("metadata_pool", mon->osdmon()->osdmap.get_pool_name( | |
1082 | mds_map.metadata_pool)); | |
1083 | f->dump_int("metadata_pool_id", mds_map.metadata_pool); | |
1084 | f->open_array_section("data_pool_ids"); | |
1085 | for (const auto &id : mds_map.data_pools) { | |
1086 | f->dump_int("data_pool_id", id); | |
1087 | } | |
1088 | f->close_section(); | |
7c673cae | 1089 | |
1adf2230 AA |
1090 | f->open_array_section("data_pools"); |
1091 | for (const auto &id : mds_map.data_pools) { | |
1092 | const auto &name = mon->osdmon()->osdmap.get_pool_name(id); | |
1093 | f->dump_string("data_pool", name); | |
7c673cae FG |
1094 | } |
1095 | f->close_section(); | |
1096 | } | |
1adf2230 | 1097 | f->close_section(); |
7c673cae FG |
1098 | } |
1099 | f->close_section(); | |
1100 | f->flush(ds); | |
1101 | } else { | |
28e407b8 AA |
1102 | for (const auto &p : fsmap.filesystems) { |
1103 | const auto &fs = p.second; | |
7c673cae FG |
1104 | const MDSMap &mds_map = fs->mds_map; |
1105 | const string &md_pool_name = mon->osdmon()->osdmap.get_pool_name( | |
1106 | mds_map.metadata_pool); | |
1107 | ||
1108 | ds << "name: " << mds_map.fs_name << ", metadata pool: " | |
1109 | << md_pool_name << ", data pools: ["; | |
1adf2230 AA |
1110 | for (const auto &id : mds_map.data_pools) { |
1111 | const string &pool_name = mon->osdmon()->osdmap.get_pool_name(id); | |
7c673cae FG |
1112 | ds << pool_name << " "; |
1113 | } | |
1114 | ds << "]" << std::endl; | |
1115 | } | |
1116 | ||
1117 | if (fsmap.filesystems.empty()) { | |
1118 | ds << "No filesystems enabled" << std::endl; | |
1119 | } | |
1120 | } | |
1121 | r = 0; | |
1122 | } | |
1123 | ||
28e407b8 | 1124 | out: |
7c673cae FG |
1125 | if (r != -1) { |
1126 | rdata.append(ds); | |
1127 | string rs; | |
1128 | getline(ss, rs); | |
1129 | mon->reply_command(op, r, rs, rdata, get_last_committed()); | |
1130 | return true; | |
1131 | } else | |
1132 | return false; | |
1133 | } | |
1134 | ||
1adf2230 | 1135 | bool MDSMonitor::fail_mds_gid(FSMap &fsmap, mds_gid_t gid) |
7c673cae | 1136 | { |
1adf2230 | 1137 | const MDSMap::mds_info_t &info = fsmap.get_info_gid(gid); |
91327a77 | 1138 | dout(1) << "fail_mds_gid " << gid << " mds." << info.name << " role " << info.rank << dendl; |
7c673cae | 1139 | |
a8e16298 TL |
1140 | ceph_assert(mon->osdmon()->is_writeable()); |
1141 | ||
7c673cae FG |
1142 | epoch_t blacklist_epoch = 0; |
1143 | if (info.rank >= 0 && info.state != MDSMap::STATE_STANDBY_REPLAY) { | |
1144 | utime_t until = ceph_clock_now(); | |
11fdf7f2 TL |
1145 | until += g_conf().get_val<double>("mon_mds_blacklist_interval"); |
1146 | blacklist_epoch = mon->osdmon()->blacklist(info.addrs, until); | |
7c673cae FG |
1147 | } |
1148 | ||
1adf2230 | 1149 | fsmap.erase(gid, blacklist_epoch); |
7c673cae FG |
1150 | last_beacon.erase(gid); |
1151 | if (pending_daemon_health.count(gid)) { | |
1152 | pending_daemon_health.erase(gid); | |
1153 | pending_daemon_health_rm.insert(gid); | |
1154 | } | |
1155 | ||
1156 | return blacklist_epoch != 0; | |
1157 | } | |
1158 | ||
1adf2230 | 1159 | mds_gid_t MDSMonitor::gid_from_arg(const FSMap &fsmap, const std::string &arg, std::ostream &ss) |
7c673cae FG |
1160 | { |
1161 | // Try parsing as a role | |
1162 | mds_role_t role; | |
1163 | std::ostringstream ignore_err; // Don't spam 'ss' with parse_role errors | |
1adf2230 | 1164 | int r = fsmap.parse_role(arg, &role, ignore_err); |
7c673cae FG |
1165 | if (r == 0) { |
1166 | // See if a GID is assigned to this role | |
28e407b8 | 1167 | const auto &fs = fsmap.get_filesystem(role.fscid); |
11fdf7f2 | 1168 | ceph_assert(fs != nullptr); // parse_role ensures it exists |
7c673cae FG |
1169 | if (fs->mds_map.is_up(role.rank)) { |
1170 | dout(10) << __func__ << ": validated rank/GID " << role | |
1171 | << " as a rank" << dendl; | |
1172 | return fs->mds_map.get_mds_info(role.rank).global_id; | |
1173 | } | |
1174 | } | |
1175 | ||
1176 | // Try parsing as a gid | |
1177 | std::string err; | |
1178 | unsigned long long maybe_gid = strict_strtoll(arg.c_str(), 10, &err); | |
1179 | if (!err.empty()) { | |
1180 | // Not a role or a GID, try as a daemon name | |
28e407b8 | 1181 | const MDSMap::mds_info_t *mds_info = fsmap.find_by_name(arg); |
7c673cae FG |
1182 | if (!mds_info) { |
1183 | ss << "MDS named '" << arg | |
1184 | << "' does not exist, or is not up"; | |
1185 | return MDS_GID_NONE; | |
1186 | } | |
1187 | dout(10) << __func__ << ": resolved MDS name '" << arg | |
1188 | << "' to GID " << mds_info->global_id << dendl; | |
1189 | return mds_info->global_id; | |
1190 | } else { | |
1191 | // Not a role, but parses as a an integer, might be a GID | |
1192 | dout(10) << __func__ << ": treating MDS reference '" << arg | |
1193 | << "' as an integer " << maybe_gid << dendl; | |
31f18b77 | 1194 | |
28e407b8 | 1195 | if (fsmap.gid_exists(mds_gid_t(maybe_gid))) { |
31f18b77 | 1196 | return mds_gid_t(maybe_gid); |
7c673cae FG |
1197 | } |
1198 | } | |
1199 | ||
1200 | dout(1) << __func__ << ": rank/GID " << arg | |
1201 | << " not a existent rank or GID" << dendl; | |
1202 | return MDS_GID_NONE; | |
1203 | } | |
1204 | ||
1adf2230 AA |
1205 | int MDSMonitor::fail_mds(FSMap &fsmap, std::ostream &ss, |
1206 | const std::string &arg, MDSMap::mds_info_t *failed_info) | |
7c673cae | 1207 | { |
11fdf7f2 | 1208 | ceph_assert(failed_info != nullptr); |
d2e6a577 | 1209 | |
1adf2230 | 1210 | mds_gid_t gid = gid_from_arg(fsmap, arg, ss); |
7c673cae FG |
1211 | if (gid == MDS_GID_NONE) { |
1212 | return 0; | |
1213 | } | |
1214 | if (!mon->osdmon()->is_writeable()) { | |
1215 | return -EAGAIN; | |
1216 | } | |
d2e6a577 FG |
1217 | |
1218 | // Take a copy of the info before removing the MDS from the map, | |
1219 | // so that the caller knows which mds (if any) they ended up removing. | |
1adf2230 | 1220 | *failed_info = fsmap.get_info_gid(gid); |
d2e6a577 | 1221 | |
1adf2230 | 1222 | fail_mds_gid(fsmap, gid); |
7c673cae | 1223 | ss << "failed mds gid " << gid; |
11fdf7f2 | 1224 | ceph_assert(mon->osdmon()->is_writeable()); |
7c673cae FG |
1225 | request_proposal(mon->osdmon()); |
1226 | return 0; | |
1227 | } | |
1228 | ||
1229 | bool MDSMonitor::prepare_command(MonOpRequestRef op) | |
1230 | { | |
1231 | op->mark_mdsmon_event(__func__); | |
1232 | MMonCommand *m = static_cast<MMonCommand*>(op->get_req()); | |
1233 | int r = -EINVAL; | |
1234 | stringstream ss; | |
1235 | bufferlist rdata; | |
1236 | ||
11fdf7f2 | 1237 | cmdmap_t cmdmap; |
7c673cae FG |
1238 | if (!cmdmap_from_json(m->cmd, &cmdmap, ss)) { |
1239 | string rs = ss.str(); | |
1240 | mon->reply_command(op, -EINVAL, rs, rdata, get_last_committed()); | |
1241 | return true; | |
1242 | } | |
1243 | ||
1244 | string prefix; | |
1245 | cmd_getval(g_ceph_context, cmdmap, "prefix", prefix); | |
1246 | ||
1247 | /* Refuse access if message not associated with a valid session */ | |
11fdf7f2 | 1248 | MonSession *session = op->get_session(); |
7c673cae FG |
1249 | if (!session) { |
1250 | mon->reply_command(op, -EACCES, "access denied", rdata, get_last_committed()); | |
1251 | return true; | |
1252 | } | |
1253 | ||
28e407b8 AA |
1254 | auto &pending = get_pending_fsmap_writeable(); |
1255 | ||
c07f9fc5 | 1256 | bool batched_propose = false; |
28e407b8 | 1257 | for (const auto &h : handlers) { |
7c673cae | 1258 | if (h->can_handle(prefix)) { |
c07f9fc5 FG |
1259 | batched_propose = h->batched_propose(); |
1260 | if (batched_propose) { | |
1261 | paxos->plug(); | |
1262 | } | |
28e407b8 | 1263 | r = h->handle(mon, pending, op, cmdmap, ss); |
c07f9fc5 FG |
1264 | if (batched_propose) { |
1265 | paxos->unplug(); | |
1266 | } | |
1267 | ||
7c673cae FG |
1268 | if (r == -EAGAIN) { |
1269 | // message has been enqueued for retry; return. | |
1270 | dout(4) << __func__ << " enqueue for retry by prepare_command" << dendl; | |
1271 | return false; | |
1272 | } else { | |
1273 | if (r == 0) { | |
1274 | // On successful updates, print the updated map | |
28e407b8 | 1275 | print_map(pending); |
7c673cae FG |
1276 | } |
1277 | // Successful or not, we're done: respond. | |
1278 | goto out; | |
1279 | } | |
1280 | } | |
1281 | } | |
1282 | ||
1adf2230 | 1283 | r = filesystem_command(pending, op, prefix, cmdmap, ss); |
7c673cae FG |
1284 | if (r >= 0) { |
1285 | goto out; | |
1286 | } else if (r == -EAGAIN) { | |
1287 | // Do not reply, the message has been enqueued for retry | |
1288 | dout(4) << __func__ << " enqueue for retry by filesystem_command" << dendl; | |
1289 | return false; | |
1290 | } else if (r != -ENOSYS) { | |
1291 | goto out; | |
1292 | } | |
1293 | ||
7c673cae FG |
1294 | if (r == -ENOSYS && ss.str().empty()) { |
1295 | ss << "unrecognized command"; | |
1296 | } | |
1297 | ||
1298 | out: | |
1299 | dout(4) << __func__ << " done, r=" << r << dendl; | |
1300 | /* Compose response */ | |
1301 | string rs; | |
1302 | getline(ss, rs); | |
1303 | ||
1304 | if (r >= 0) { | |
1305 | // success.. delay reply | |
1306 | wait_for_finished_proposal(op, new Monitor::C_Command(mon, op, r, rs, | |
1307 | get_last_committed() + 1)); | |
c07f9fc5 FG |
1308 | if (batched_propose) { |
1309 | force_immediate_propose(); | |
1310 | } | |
7c673cae FG |
1311 | return true; |
1312 | } else { | |
1313 | // reply immediately | |
1314 | mon->reply_command(op, r, rs, rdata, get_last_committed()); | |
1315 | return false; | |
1316 | } | |
1317 | } | |
1318 | ||
7c673cae | 1319 | int MDSMonitor::filesystem_command( |
1adf2230 | 1320 | FSMap &fsmap, |
7c673cae FG |
1321 | MonOpRequestRef op, |
1322 | std::string const &prefix, | |
11fdf7f2 | 1323 | const cmdmap_t& cmdmap, |
7c673cae FG |
1324 | std::stringstream &ss) |
1325 | { | |
1326 | dout(4) << __func__ << " prefix='" << prefix << "'" << dendl; | |
1327 | op->mark_mdsmon_event(__func__); | |
1328 | int r = 0; | |
1329 | string whostr; | |
11fdf7f2 | 1330 | cmd_getval(g_ceph_context, cmdmap, "role", whostr); |
7c673cae | 1331 | |
11fdf7f2 | 1332 | if (prefix == "mds set_state") { |
7c673cae FG |
1333 | mds_gid_t gid; |
1334 | if (!cmd_getval(g_ceph_context, cmdmap, "gid", gid)) { | |
1335 | ss << "error parsing 'gid' value '" | |
11fdf7f2 | 1336 | << cmd_vartype_stringify(cmdmap.at("gid")) << "'"; |
7c673cae FG |
1337 | return -EINVAL; |
1338 | } | |
1339 | MDSMap::DaemonState state; | |
1340 | if (!cmd_getval(g_ceph_context, cmdmap, "state", state)) { | |
1341 | ss << "error parsing 'state' string value '" | |
11fdf7f2 | 1342 | << cmd_vartype_stringify(cmdmap.at("state")) << "'"; |
7c673cae FG |
1343 | return -EINVAL; |
1344 | } | |
1adf2230 | 1345 | if (fsmap.gid_exists(gid)) { |
11fdf7f2 TL |
1346 | fsmap.modify_daemon(gid, [state](auto& info) { |
1347 | info.state = state; | |
7c673cae FG |
1348 | }); |
1349 | ss << "set mds gid " << gid << " to state " << state << " " | |
1350 | << ceph_mds_state_name(state); | |
1351 | return 0; | |
1352 | } | |
1353 | } else if (prefix == "mds fail") { | |
1354 | string who; | |
11fdf7f2 | 1355 | cmd_getval(g_ceph_context, cmdmap, "role_or_gid", who); |
d2e6a577 FG |
1356 | |
1357 | MDSMap::mds_info_t failed_info; | |
1adf2230 | 1358 | r = fail_mds(fsmap, ss, who, &failed_info); |
7c673cae FG |
1359 | if (r < 0 && r == -EAGAIN) { |
1360 | mon->osdmon()->wait_for_writeable(op, new C_RetryMessage(this, op)); | |
1361 | return -EAGAIN; // don't propose yet; wait for message to be retried | |
d2e6a577 FG |
1362 | } else if (r == 0) { |
1363 | // Only log if we really did something (not when was already gone) | |
1364 | if (failed_info.global_id != MDS_GID_NONE) { | |
1365 | mon->clog->info() << failed_info.human_name() << " marked failed by " | |
1366 | << op->get_session()->entity_name; | |
1367 | } | |
7c673cae FG |
1368 | } |
1369 | } else if (prefix == "mds rm") { | |
1370 | mds_gid_t gid; | |
1371 | if (!cmd_getval(g_ceph_context, cmdmap, "gid", gid)) { | |
1372 | ss << "error parsing 'gid' value '" | |
11fdf7f2 | 1373 | << cmd_vartype_stringify(cmdmap.at("gid")) << "'"; |
7c673cae FG |
1374 | return -EINVAL; |
1375 | } | |
1adf2230 | 1376 | if (!fsmap.gid_exists(gid)) { |
11fdf7f2 | 1377 | ss << "mds gid " << gid << " does not exist"; |
7c673cae FG |
1378 | r = 0; |
1379 | } else { | |
1adf2230 | 1380 | const auto &info = fsmap.get_info_gid(gid); |
28e407b8 | 1381 | MDSMap::DaemonState state = info.state; |
7c673cae | 1382 | if (state > 0) { |
28e407b8 AA |
1383 | ss << "cannot remove active mds." << info.name |
1384 | << " rank " << info.rank; | |
7c673cae FG |
1385 | return -EBUSY; |
1386 | } else { | |
1adf2230 | 1387 | fsmap.erase(gid, {}); |
7c673cae FG |
1388 | ss << "removed mds gid " << gid; |
1389 | return 0; | |
1390 | } | |
1391 | } | |
1392 | } else if (prefix == "mds rmfailed") { | |
11fdf7f2 TL |
1393 | bool confirm = false; |
1394 | cmd_getval(g_ceph_context, cmdmap, "yes_i_really_mean_it", confirm); | |
1395 | if (!confirm) { | |
7c673cae FG |
1396 | ss << "WARNING: this can make your filesystem inaccessible! " |
1397 | "Add --yes-i-really-mean-it if you are sure you wish to continue."; | |
1398 | return -EPERM; | |
1399 | } | |
1400 | ||
1401 | std::string role_str; | |
11fdf7f2 | 1402 | cmd_getval(g_ceph_context, cmdmap, "role", role_str); |
7c673cae | 1403 | mds_role_t role; |
1adf2230 | 1404 | int r = fsmap.parse_role(role_str, &role, ss); |
7c673cae FG |
1405 | if (r < 0) { |
1406 | ss << "invalid role '" << role_str << "'"; | |
1407 | return -EINVAL; | |
1408 | } | |
1409 | ||
1adf2230 | 1410 | fsmap.modify_filesystem( |
7c673cae FG |
1411 | role.fscid, |
1412 | [role](std::shared_ptr<Filesystem> fs) | |
1413 | { | |
1414 | fs->mds_map.failed.erase(role.rank); | |
1415 | }); | |
1416 | ||
1417 | ss << "removed failed mds." << role; | |
1418 | return 0; | |
1419 | } else if (prefix == "mds compat rm_compat") { | |
1420 | int64_t f; | |
1421 | if (!cmd_getval(g_ceph_context, cmdmap, "feature", f)) { | |
1422 | ss << "error parsing feature value '" | |
11fdf7f2 | 1423 | << cmd_vartype_stringify(cmdmap.at("feature")) << "'"; |
7c673cae FG |
1424 | return -EINVAL; |
1425 | } | |
1adf2230 | 1426 | if (fsmap.compat.compat.contains(f)) { |
7c673cae | 1427 | ss << "removing compat feature " << f; |
1adf2230 | 1428 | CompatSet modified = fsmap.compat; |
7c673cae | 1429 | modified.compat.remove(f); |
1adf2230 | 1430 | fsmap.update_compat(modified); |
7c673cae | 1431 | } else { |
1adf2230 | 1432 | ss << "compat feature " << f << " not present in " << fsmap.compat; |
7c673cae FG |
1433 | } |
1434 | r = 0; | |
1435 | } else if (prefix == "mds compat rm_incompat") { | |
1436 | int64_t f; | |
1437 | if (!cmd_getval(g_ceph_context, cmdmap, "feature", f)) { | |
1438 | ss << "error parsing feature value '" | |
11fdf7f2 | 1439 | << cmd_vartype_stringify(cmdmap.at("feature")) << "'"; |
7c673cae FG |
1440 | return -EINVAL; |
1441 | } | |
1adf2230 | 1442 | if (fsmap.compat.incompat.contains(f)) { |
7c673cae | 1443 | ss << "removing incompat feature " << f; |
1adf2230 | 1444 | CompatSet modified = fsmap.compat; |
7c673cae | 1445 | modified.incompat.remove(f); |
1adf2230 | 1446 | fsmap.update_compat(modified); |
7c673cae | 1447 | } else { |
1adf2230 | 1448 | ss << "incompat feature " << f << " not present in " << fsmap.compat; |
7c673cae FG |
1449 | } |
1450 | r = 0; | |
1451 | } else if (prefix == "mds repaired") { | |
1452 | std::string role_str; | |
11fdf7f2 | 1453 | cmd_getval(g_ceph_context, cmdmap, "role", role_str); |
7c673cae | 1454 | mds_role_t role; |
1adf2230 | 1455 | r = fsmap.parse_role(role_str, &role, ss); |
7c673cae FG |
1456 | if (r < 0) { |
1457 | return r; | |
1458 | } | |
1459 | ||
1adf2230 | 1460 | bool modified = fsmap.undamaged(role.fscid, role.rank); |
7c673cae | 1461 | if (modified) { |
494da23a | 1462 | ss << "repaired: restoring rank " << role; |
7c673cae | 1463 | } else { |
494da23a | 1464 | ss << "nothing to do: rank is not damaged"; |
7c673cae FG |
1465 | } |
1466 | ||
1467 | r = 0; | |
11fdf7f2 TL |
1468 | } else if (prefix == "mds freeze") { |
1469 | std::string who; | |
1470 | cmd_getval(g_ceph_context, cmdmap, "role_or_gid", who); | |
1471 | mds_gid_t gid = gid_from_arg(fsmap, who, ss); | |
1472 | if (gid == MDS_GID_NONE) { | |
7c673cae FG |
1473 | return -EINVAL; |
1474 | } | |
1475 | ||
11fdf7f2 | 1476 | bool freeze = false; |
7c673cae | 1477 | { |
11fdf7f2 TL |
1478 | std::string str; |
1479 | cmd_getval(g_ceph_context, cmdmap, "val", str); | |
1480 | if ((r = parse_bool(str, &freeze, ss)) != 0) { | |
1481 | return r; | |
1482 | } | |
1483 | } | |
7c673cae | 1484 | |
11fdf7f2 TL |
1485 | auto f = [freeze,gid,&ss](auto& info) { |
1486 | if (freeze) { | |
1487 | ss << "freezing mds." << gid; | |
1488 | info.freeze(); | |
1489 | } else { | |
1490 | ss << "unfreezing mds." << gid; | |
1491 | info.unfreeze(); | |
1492 | } | |
1493 | }; | |
1494 | fsmap.modify_daemon(gid, f); | |
7c673cae FG |
1495 | r = 0; |
1496 | } else { | |
1497 | return -ENOSYS; | |
1498 | } | |
1499 | ||
1500 | return r; | |
1501 | } | |
1502 | ||
7c673cae FG |
1503 | void MDSMonitor::check_subs() |
1504 | { | |
1505 | std::list<std::string> types; | |
1506 | ||
1507 | // Subscriptions may be to "mdsmap" (MDS and legacy clients), | |
1508 | // "mdsmap.<namespace>", or to "fsmap" for the full state of all | |
1509 | // filesystems. Build a list of all the types we service | |
1510 | // subscriptions for. | |
1511 | types.push_back("fsmap"); | |
1512 | types.push_back("fsmap.user"); | |
1513 | types.push_back("mdsmap"); | |
28e407b8 AA |
1514 | for (const auto &p : get_fsmap().filesystems) { |
1515 | const auto &fscid = p.first; | |
7c673cae FG |
1516 | std::ostringstream oss; |
1517 | oss << "mdsmap." << fscid; | |
1518 | types.push_back(oss.str()); | |
1519 | } | |
1520 | ||
1521 | for (const auto &type : types) { | |
1522 | if (mon->session_map.subs.count(type) == 0) | |
1523 | continue; | |
1524 | xlist<Subscription*>::iterator p = mon->session_map.subs[type]->begin(); | |
1525 | while (!p.end()) { | |
1526 | Subscription *sub = *p; | |
1527 | ++p; | |
1528 | check_sub(sub); | |
1529 | } | |
1530 | } | |
1531 | } | |
1532 | ||
1533 | ||
1534 | void MDSMonitor::check_sub(Subscription *sub) | |
1535 | { | |
1536 | dout(20) << __func__ << ": " << sub->type << dendl; | |
1537 | ||
28e407b8 AA |
1538 | const auto &fsmap = get_fsmap(); |
1539 | ||
7c673cae FG |
1540 | if (sub->type == "fsmap") { |
1541 | if (sub->next <= fsmap.get_epoch()) { | |
1542 | sub->session->con->send_message(new MFSMap(mon->monmap->fsid, fsmap)); | |
1543 | if (sub->onetime) { | |
1544 | mon->session_map.remove_sub(sub); | |
1545 | } else { | |
1546 | sub->next = fsmap.get_epoch() + 1; | |
1547 | } | |
1548 | } | |
1549 | } else if (sub->type == "fsmap.user") { | |
1550 | if (sub->next <= fsmap.get_epoch()) { | |
1551 | FSMapUser fsmap_u; | |
1552 | fsmap_u.epoch = fsmap.get_epoch(); | |
1553 | fsmap_u.legacy_client_fscid = fsmap.legacy_client_fscid; | |
28e407b8 AA |
1554 | for (const auto &p : fsmap.filesystems) { |
1555 | FSMapUser::fs_info_t& fs_info = fsmap_u.filesystems[p.second->fscid]; | |
1556 | fs_info.cid = p.second->fscid; | |
1557 | fs_info.name = p.second->mds_map.fs_name; | |
7c673cae FG |
1558 | } |
1559 | sub->session->con->send_message(new MFSMapUser(mon->monmap->fsid, fsmap_u)); | |
1560 | if (sub->onetime) { | |
1561 | mon->session_map.remove_sub(sub); | |
1562 | } else { | |
1563 | sub->next = fsmap.get_epoch() + 1; | |
1564 | } | |
1565 | } | |
1566 | } else if (sub->type.compare(0, 6, "mdsmap") == 0) { | |
1567 | if (sub->next > fsmap.get_epoch()) { | |
1568 | return; | |
1569 | } | |
1570 | ||
11fdf7f2 | 1571 | const bool is_mds = sub->session->name.is_mds(); |
7c673cae FG |
1572 | mds_gid_t mds_gid = MDS_GID_NONE; |
1573 | fs_cluster_id_t fscid = FS_CLUSTER_ID_NONE; | |
1574 | if (is_mds) { | |
1575 | // What (if any) namespace are you assigned to? | |
1576 | auto mds_info = fsmap.get_mds_info(); | |
1adf2230 | 1577 | for (const auto &p : mds_info) { |
11fdf7f2 | 1578 | if (p.second.addrs == sub->session->addrs) { |
1adf2230 | 1579 | mds_gid = p.first; |
7c673cae FG |
1580 | fscid = fsmap.mds_roles.at(mds_gid); |
1581 | } | |
1582 | } | |
1583 | } else { | |
1584 | // You're a client. Did you request a particular | |
1585 | // namespace? | |
11fdf7f2 | 1586 | if (sub->type.compare(0, 7, "mdsmap.") == 0) { |
7c673cae FG |
1587 | auto namespace_id_str = sub->type.substr(std::string("mdsmap.").size()); |
1588 | dout(10) << __func__ << ": namespace_id " << namespace_id_str << dendl; | |
1589 | std::string err; | |
1590 | fscid = strict_strtoll(namespace_id_str.c_str(), 10, &err); | |
1591 | if (!err.empty()) { | |
1592 | // Client asked for a non-existent namespace, send them nothing | |
1593 | dout(1) << "Invalid client subscription '" << sub->type | |
1594 | << "'" << dendl; | |
1595 | return; | |
1596 | } | |
1597 | if (fsmap.filesystems.count(fscid) == 0) { | |
1598 | // Client asked for a non-existent namespace, send them nothing | |
1599 | // TODO: something more graceful for when a client has a filesystem | |
1600 | // mounted, and the fileysstem is deleted. Add a "shut down you fool" | |
1601 | // flag to MMDSMap? | |
1602 | dout(1) << "Client subscribed to non-existent namespace '" << | |
1603 | fscid << "'" << dendl; | |
1604 | return; | |
1605 | } | |
1606 | } else { | |
1607 | // Unqualified request for "mdsmap": give it the one marked | |
1608 | // for use by legacy clients. | |
1609 | if (fsmap.legacy_client_fscid != FS_CLUSTER_ID_NONE) { | |
1610 | fscid = fsmap.legacy_client_fscid; | |
1611 | } else { | |
1612 | dout(1) << "Client subscribed for legacy filesystem but " | |
1613 | "none is configured" << dendl; | |
1614 | return; | |
1615 | } | |
1616 | } | |
1617 | } | |
1618 | dout(10) << __func__ << ": is_mds=" << is_mds << ", fscid= " << fscid << dendl; | |
1619 | ||
1620 | // Work out the effective latest epoch | |
28e407b8 | 1621 | const MDSMap *mds_map = nullptr; |
7c673cae FG |
1622 | MDSMap null_map; |
1623 | null_map.compat = fsmap.compat; | |
1624 | if (fscid == FS_CLUSTER_ID_NONE) { | |
1625 | // For a client, we should have already dropped out | |
11fdf7f2 | 1626 | ceph_assert(is_mds); |
7c673cae | 1627 | |
28e407b8 AA |
1628 | auto it = fsmap.standby_daemons.find(mds_gid); |
1629 | if (it != fsmap.standby_daemons.end()) { | |
7c673cae | 1630 | // For an MDS, we need to feed it an MDSMap with its own state in |
28e407b8 AA |
1631 | null_map.mds_info[mds_gid] = it->second; |
1632 | null_map.epoch = fsmap.standby_epochs.at(mds_gid); | |
7c673cae FG |
1633 | } else { |
1634 | null_map.epoch = fsmap.epoch; | |
1635 | } | |
1636 | mds_map = &null_map; | |
1637 | } else { | |
1638 | // Check the effective epoch | |
28e407b8 | 1639 | mds_map = &fsmap.get_filesystem(fscid)->mds_map; |
7c673cae FG |
1640 | } |
1641 | ||
11fdf7f2 | 1642 | ceph_assert(mds_map != nullptr); |
7c673cae FG |
1643 | dout(10) << __func__ << " selected MDS map epoch " << |
1644 | mds_map->epoch << " for namespace " << fscid << " for subscriber " | |
11fdf7f2 | 1645 | << sub->session->name << " who wants epoch " << sub->next << dendl; |
7c673cae FG |
1646 | |
1647 | if (sub->next > mds_map->epoch) { | |
1648 | return; | |
1649 | } | |
11fdf7f2 | 1650 | auto msg = MMDSMap::create(mon->monmap->fsid, *mds_map); |
7c673cae | 1651 | |
11fdf7f2 | 1652 | sub->session->con->send_message(msg.detach()); |
7c673cae FG |
1653 | if (sub->onetime) { |
1654 | mon->session_map.remove_sub(sub); | |
1655 | } else { | |
1656 | sub->next = mds_map->get_epoch() + 1; | |
1657 | } | |
1658 | } | |
1659 | } | |
1660 | ||
1661 | ||
1662 | void MDSMonitor::update_metadata(mds_gid_t gid, | |
1663 | const map<string, string>& metadata) | |
1664 | { | |
1665 | if (metadata.empty()) { | |
1666 | return; | |
1667 | } | |
1668 | pending_metadata[gid] = metadata; | |
1669 | ||
1670 | MonitorDBStore::TransactionRef t = paxos->get_pending_transaction(); | |
1671 | bufferlist bl; | |
11fdf7f2 | 1672 | encode(pending_metadata, bl); |
7c673cae FG |
1673 | t->put(MDS_METADATA_PREFIX, "last_metadata", bl); |
1674 | paxos->trigger_propose(); | |
1675 | } | |
1676 | ||
1adf2230 | 1677 | void MDSMonitor::remove_from_metadata(const FSMap &fsmap, MonitorDBStore::TransactionRef t) |
7c673cae FG |
1678 | { |
1679 | bool update = false; | |
1adf2230 AA |
1680 | for (auto it = pending_metadata.begin(); it != pending_metadata.end(); ) { |
1681 | if (!fsmap.gid_exists(it->first)) { | |
1682 | it = pending_metadata.erase(it); | |
7c673cae FG |
1683 | update = true; |
1684 | } else { | |
1adf2230 | 1685 | ++it; |
7c673cae FG |
1686 | } |
1687 | } | |
1688 | if (!update) | |
1689 | return; | |
1690 | bufferlist bl; | |
11fdf7f2 | 1691 | encode(pending_metadata, bl); |
7c673cae FG |
1692 | t->put(MDS_METADATA_PREFIX, "last_metadata", bl); |
1693 | } | |
1694 | ||
1695 | int MDSMonitor::load_metadata(map<mds_gid_t, Metadata>& m) | |
1696 | { | |
1697 | bufferlist bl; | |
1698 | int r = mon->store->get(MDS_METADATA_PREFIX, "last_metadata", bl); | |
1699 | if (r) { | |
11fdf7f2 | 1700 | dout(5) << "Unable to load 'last_metadata'" << dendl; |
7c673cae FG |
1701 | return r; |
1702 | } | |
1703 | ||
11fdf7f2 TL |
1704 | auto it = bl.cbegin(); |
1705 | ceph::decode(m, it); | |
7c673cae FG |
1706 | return 0; |
1707 | } | |
1708 | ||
1adf2230 | 1709 | void MDSMonitor::count_metadata(const std::string &field, map<string,int> *out) |
31f18b77 | 1710 | { |
31f18b77 FG |
1711 | map<mds_gid_t,Metadata> meta; |
1712 | load_metadata(meta); | |
1713 | for (auto& p : meta) { | |
1714 | auto q = p.second.find(field); | |
1715 | if (q == p.second.end()) { | |
c07f9fc5 | 1716 | (*out)["unknown"]++; |
31f18b77 | 1717 | } else { |
c07f9fc5 | 1718 | (*out)[q->second]++; |
31f18b77 FG |
1719 | } |
1720 | } | |
c07f9fc5 FG |
1721 | } |
1722 | ||
1adf2230 | 1723 | void MDSMonitor::count_metadata(const std::string &field, Formatter *f) |
c07f9fc5 FG |
1724 | { |
1725 | map<string,int> by_val; | |
1726 | count_metadata(field, &by_val); | |
31f18b77 FG |
1727 | f->open_object_section(field.c_str()); |
1728 | for (auto& p : by_val) { | |
1729 | f->dump_int(p.first.c_str(), p.second); | |
1730 | } | |
1731 | f->close_section(); | |
1732 | } | |
1733 | ||
1adf2230 AA |
1734 | int MDSMonitor::dump_metadata(const FSMap& fsmap, const std::string &who, |
1735 | Formatter *f, ostream& err) | |
7c673cae | 1736 | { |
11fdf7f2 | 1737 | ceph_assert(f); |
7c673cae | 1738 | |
1adf2230 | 1739 | mds_gid_t gid = gid_from_arg(fsmap, who, err); |
7c673cae FG |
1740 | if (gid == MDS_GID_NONE) { |
1741 | return -EINVAL; | |
1742 | } | |
1743 | ||
1744 | map<mds_gid_t, Metadata> metadata; | |
1745 | if (int r = load_metadata(metadata)) { | |
1746 | err << "Unable to load 'last_metadata'"; | |
1747 | return r; | |
1748 | } | |
1749 | ||
1750 | if (!metadata.count(gid)) { | |
1751 | return -ENOENT; | |
1752 | } | |
1753 | const Metadata& m = metadata[gid]; | |
1754 | for (Metadata::const_iterator p = m.begin(); p != m.end(); ++p) { | |
1755 | f->dump_string(p->first.c_str(), p->second); | |
1756 | } | |
1757 | return 0; | |
1758 | } | |
1759 | ||
1760 | int MDSMonitor::print_nodes(Formatter *f) | |
1761 | { | |
11fdf7f2 | 1762 | ceph_assert(f); |
7c673cae | 1763 | |
1adf2230 AA |
1764 | const auto &fsmap = get_fsmap(); |
1765 | ||
7c673cae FG |
1766 | map<mds_gid_t, Metadata> metadata; |
1767 | if (int r = load_metadata(metadata)) { | |
1768 | return r; | |
1769 | } | |
1770 | ||
11fdf7f2 | 1771 | map<string, list<string> > mdses; // hostname => mds |
1adf2230 AA |
1772 | for (const auto &p : metadata) { |
1773 | const mds_gid_t& gid = p.first; | |
1774 | const Metadata& m = p.second; | |
7c673cae FG |
1775 | Metadata::const_iterator hostname = m.find("hostname"); |
1776 | if (hostname == m.end()) { | |
1777 | // not likely though | |
1778 | continue; | |
1779 | } | |
1adf2230 | 1780 | if (!fsmap.gid_exists(gid)) { |
7c673cae FG |
1781 | dout(5) << __func__ << ": GID " << gid << " not existent" << dendl; |
1782 | continue; | |
1783 | } | |
1adf2230 | 1784 | const MDSMap::mds_info_t& mds_info = fsmap.get_info_gid(gid); |
11fdf7f2 | 1785 | mdses[hostname->second].push_back(mds_info.name); |
7c673cae FG |
1786 | } |
1787 | ||
1788 | dump_services(f, mdses, "mds"); | |
1789 | return 0; | |
1790 | } | |
1791 | ||
1792 | /** | |
1793 | * If a cluster is undersized (with respect to max_mds), then | |
11fdf7f2 TL |
1794 | * attempt to find daemons to grow it. If the cluster is oversized |
1795 | * (with respect to max_mds) then shrink it by stopping its highest rank. | |
7c673cae | 1796 | */ |
11fdf7f2 | 1797 | bool MDSMonitor::maybe_resize_cluster(FSMap &fsmap, fs_cluster_id_t fscid) |
7c673cae | 1798 | { |
11fdf7f2 TL |
1799 | auto ¤t_mds_map = get_fsmap().get_filesystem(fscid)->mds_map; |
1800 | auto&& fs = fsmap.get_filesystem(fscid); | |
1adf2230 | 1801 | auto &mds_map = fs->mds_map; |
7c673cae | 1802 | |
1adf2230 AA |
1803 | int in = mds_map.get_num_in_mds(); |
1804 | int max = mds_map.get_max_mds(); | |
1805 | ||
1806 | dout(20) << __func__ << " in " << in << " max " << max << dendl; | |
1807 | ||
11fdf7f2 TL |
1808 | /* Check that both the current epoch mds_map is resizeable as well as the |
1809 | * current batch of changes in pending. This is important if an MDS is | |
1810 | * becoming active in the next epoch. | |
1811 | */ | |
1812 | if (!current_mds_map.is_resizeable() || | |
1813 | !mds_map.is_resizeable()) { | |
1814 | dout(5) << __func__ << " mds_map is not currently resizeable" << dendl; | |
1815 | return false; | |
1816 | } | |
1817 | ||
1818 | if (in < max && !mds_map.test_flag(CEPH_MDSMAP_NOT_JOINABLE)) { | |
7c673cae FG |
1819 | mds_rank_t mds = mds_rank_t(0); |
1820 | string name; | |
1adf2230 | 1821 | while (mds_map.is_in(mds)) { |
7c673cae FG |
1822 | mds++; |
1823 | } | |
11fdf7f2 | 1824 | auto&& newgid = fsmap.find_replacement_for({fscid, mds}, name); |
7c673cae | 1825 | if (newgid == MDS_GID_NONE) { |
1adf2230 | 1826 | return false; |
7c673cae FG |
1827 | } |
1828 | ||
1adf2230 | 1829 | const auto &new_info = fsmap.get_info_gid(newgid); |
11fdf7f2 | 1830 | dout(1) << "assigned standby " << new_info.addrs |
7c673cae | 1831 | << " as mds." << mds << dendl; |
d2e6a577 FG |
1832 | |
1833 | mon->clog->info() << new_info.human_name() << " assigned to " | |
1adf2230 AA |
1834 | "filesystem " << mds_map.fs_name << " as rank " |
1835 | << mds << " (now has " << mds_map.get_num_in_mds() + 1 | |
d2e6a577 | 1836 | << " ranks)"; |
11fdf7f2 | 1837 | fsmap.promote(newgid, *fs, mds); |
1adf2230 | 1838 | return true; |
11fdf7f2 TL |
1839 | } else if (in > max) { |
1840 | mds_rank_t target = in - 1; | |
1841 | const auto &info = mds_map.get_info(target); | |
1842 | if (mds_map.is_active(target)) { | |
1843 | dout(1) << "stopping " << target << dendl; | |
1844 | mon->clog->info() << "stopping " << info.human_name(); | |
1845 | auto f = [](auto& info) { | |
1846 | info.state = MDSMap::STATE_STOPPING; | |
1847 | }; | |
1848 | fsmap.modify_daemon(info.global_id, f); | |
1849 | return true; | |
1850 | } else { | |
1851 | dout(20) << "skipping stop of " << target << dendl; | |
1852 | return false; | |
1853 | } | |
7c673cae FG |
1854 | } |
1855 | ||
1adf2230 | 1856 | return false; |
7c673cae FG |
1857 | } |
1858 | ||
1859 | ||
1860 | /** | |
1861 | * If a daemon is laggy, and a suitable replacement | |
1862 | * is available, fail this daemon (remove from map) and pass its | |
1863 | * role to another daemon. | |
1864 | */ | |
1adf2230 AA |
1865 | void MDSMonitor::maybe_replace_gid(FSMap &fsmap, mds_gid_t gid, |
1866 | const MDSMap::mds_info_t& info, bool *mds_propose, bool *osd_propose) | |
7c673cae | 1867 | { |
11fdf7f2 TL |
1868 | ceph_assert(mds_propose != nullptr); |
1869 | ceph_assert(osd_propose != nullptr); | |
7c673cae | 1870 | |
1adf2230 | 1871 | const auto fscid = fsmap.mds_roles.at(gid); |
7c673cae | 1872 | |
31f18b77 FG |
1873 | // We will only take decisive action (replacing/removing a daemon) |
1874 | // if we have some indicating that some other daemon(s) are successfully | |
1875 | // getting beacons through recently. | |
1adf2230 AA |
1876 | mono_time latest_beacon = mono_clock::zero(); |
1877 | for (const auto &p : last_beacon) { | |
1878 | latest_beacon = std::max(p.second.stamp, latest_beacon); | |
31f18b77 | 1879 | } |
1adf2230 AA |
1880 | mono_time now = mono_clock::now(); |
1881 | chrono::duration<double> since = now-latest_beacon; | |
11fdf7f2 | 1882 | const bool frozen = info.is_frozen(); |
1adf2230 | 1883 | const bool may_replace = since.count() < |
11fdf7f2 | 1884 | std::max(g_conf()->mds_beacon_interval, g_conf()->mds_beacon_grace * 0.5); |
31f18b77 | 1885 | |
7c673cae FG |
1886 | // are we in? |
1887 | // and is there a non-laggy standby that can take over for us? | |
1888 | mds_gid_t sgid; | |
1889 | if (info.rank >= 0 && | |
1890 | info.state != MDSMap::STATE_STANDBY && | |
1891 | info.state != MDSMap::STATE_STANDBY_REPLAY && | |
31f18b77 | 1892 | may_replace && |
11fdf7f2 TL |
1893 | !frozen && |
1894 | !fsmap.get_filesystem(fscid)->mds_map.test_flag(CEPH_MDSMAP_NOT_JOINABLE) && | |
1895 | (sgid = fsmap.find_replacement_for({fscid, info.rank}, info.name)) != MDS_GID_NONE) | |
7c673cae FG |
1896 | { |
1897 | ||
1adf2230 | 1898 | MDSMap::mds_info_t si = fsmap.get_info_gid(sgid); |
11fdf7f2 TL |
1899 | dout(1) << " replacing " << gid << " " << info.addrs |
1900 | << " mds." << info.rank << "." << info.inc | |
1901 | << " " << ceph_mds_state_name(info.state) | |
1902 | << " with " << sgid << "/" << si.name << " " << si.addrs | |
1903 | << dendl; | |
7c673cae | 1904 | |
d2e6a577 | 1905 | mon->clog->warn() << info.human_name() |
31f18b77 FG |
1906 | << " is not responding, replacing it " |
1907 | << "as rank " << info.rank | |
d2e6a577 | 1908 | << " with standby " << si.human_name(); |
31f18b77 | 1909 | |
7c673cae | 1910 | // Remember what NS the old one was in |
1adf2230 | 1911 | const fs_cluster_id_t fscid = fsmap.mds_roles.at(gid); |
7c673cae FG |
1912 | |
1913 | // Remove the old one | |
1adf2230 | 1914 | *osd_propose |= fail_mds_gid(fsmap, gid); |
7c673cae FG |
1915 | |
1916 | // Promote the replacement | |
11fdf7f2 TL |
1917 | auto&& fs = fsmap.filesystems.at(fscid); |
1918 | fsmap.promote(sgid, *fs, info.rank); | |
7c673cae FG |
1919 | |
1920 | *mds_propose = true; | |
31f18b77 | 1921 | } else if ((info.state == MDSMap::STATE_STANDBY_REPLAY || |
11fdf7f2 TL |
1922 | info.state == MDSMap::STATE_STANDBY) && may_replace && !frozen) { |
1923 | dout(1) << " failing and removing " << gid << " " << info.addrs | |
1924 | << " mds." << info.rank | |
1925 | << "." << info.inc << " " << ceph_mds_state_name(info.state) | |
1926 | << dendl; | |
d2e6a577 FG |
1927 | mon->clog->info() << "Standby " << info.human_name() << " is not " |
1928 | "responding, dropping it"; | |
1adf2230 | 1929 | fail_mds_gid(fsmap, gid); |
7c673cae FG |
1930 | *mds_propose = true; |
1931 | } else if (!info.laggy()) { | |
11fdf7f2 TL |
1932 | dout(1) << " marking " << gid << " " << info.addrs |
1933 | << " mds." << info.rank << "." << info.inc | |
1934 | << " " << ceph_mds_state_name(info.state) | |
1935 | << " laggy" << dendl; | |
1936 | fsmap.modify_daemon(info.global_id, [](auto& info) { | |
1937 | info.laggy_since = ceph_clock_now(); | |
7c673cae FG |
1938 | }); |
1939 | *mds_propose = true; | |
1940 | } | |
1941 | } | |
1942 | ||
11fdf7f2 | 1943 | bool MDSMonitor::maybe_promote_standby(FSMap &fsmap, Filesystem& fs) |
7c673cae | 1944 | { |
11fdf7f2 TL |
1945 | if (fs.mds_map.test_flag(CEPH_MDSMAP_NOT_JOINABLE)) { |
1946 | return false; | |
1947 | } | |
7c673cae FG |
1948 | |
1949 | bool do_propose = false; | |
1950 | ||
1951 | // have a standby take over? | |
1952 | set<mds_rank_t> failed; | |
11fdf7f2 TL |
1953 | fs.mds_map.get_failed_mds_set(failed); |
1954 | for (const auto& rank : failed) { | |
1955 | auto&& sgid = fsmap.find_replacement_for({fs.fscid, rank}, {}); | |
1956 | if (sgid) { | |
1957 | auto&& info = fsmap.get_info_gid(sgid); | |
1958 | dout(1) << " taking over failed mds." << rank << " with " << sgid | |
1959 | << "/" << info.name << " " << info.addrs << dendl; | |
1960 | mon->clog->info() << "Standby " << info.human_name() | |
1961 | << " assigned to filesystem " << fs.mds_map.fs_name | |
1962 | << " as rank " << rank; | |
1963 | ||
1964 | fsmap.promote(sgid, fs, rank); | |
1965 | do_propose = true; | |
7c673cae | 1966 | } |
11fdf7f2 TL |
1967 | } |
1968 | ||
1969 | if (fs.mds_map.allows_standby_replay() && !fs.mds_map.is_degraded()) { | |
7c673cae | 1970 | // There were no failures to replace, so try using any available standbys |
a8e16298 TL |
1971 | // as standby-replay daemons. Don't do this when the cluster is degraded |
1972 | // as a standby-replay daemon may try to read a journal being migrated. | |
11fdf7f2 TL |
1973 | for (;;) { |
1974 | auto standby_gid = fsmap.get_available_standby(); | |
1975 | if (standby_gid == MDS_GID_NONE) break; | |
1976 | dout(20) << "standby available mds." << standby_gid << dendl; | |
1977 | bool changed = false; | |
1978 | for (const auto& rank : fs.mds_map.in) { | |
1979 | dout(20) << "exmaining " << rank << dendl; | |
1980 | if (fs.mds_map.is_followable(rank)) { | |
1981 | dout(1) << " setting mds." << standby_gid | |
1982 | << " to follow mds rank " << rank << dendl; | |
1983 | fsmap.assign_standby_replay(standby_gid, fs.fscid, rank); | |
1984 | do_propose = true; | |
1985 | changed = true; | |
1986 | break; | |
7c673cae | 1987 | } |
7c673cae | 1988 | } |
11fdf7f2 | 1989 | if (!changed) break; |
7c673cae FG |
1990 | } |
1991 | } | |
1992 | ||
1993 | return do_propose; | |
1994 | } | |
1995 | ||
1996 | void MDSMonitor::tick() | |
1997 | { | |
1998 | // make sure mds's are still alive | |
1999 | // ...if i am an active leader | |
28e407b8 | 2000 | |
1adf2230 | 2001 | if (!is_active() || !is_leader()) return; |
28e407b8 AA |
2002 | |
2003 | auto &pending = get_pending_fsmap_writeable(); | |
7c673cae | 2004 | |
28e407b8 | 2005 | bool do_propose = false; |
7c673cae | 2006 | |
28e407b8 | 2007 | do_propose |= pending.check_health(); |
7c673cae | 2008 | |
11fdf7f2 | 2009 | // resize mds cluster (adjust @in)? |
28e407b8 | 2010 | for (auto &p : pending.filesystems) { |
11fdf7f2 | 2011 | do_propose |= maybe_resize_cluster(pending, p.second->fscid); |
7c673cae FG |
2012 | } |
2013 | ||
1adf2230 | 2014 | mono_time now = mono_clock::now(); |
11fdf7f2 | 2015 | if (mono_clock::is_zero(last_tick)) { |
7c673cae FG |
2016 | last_tick = now; |
2017 | } | |
1adf2230 | 2018 | chrono::duration<double> since_last = now-last_tick; |
7c673cae | 2019 | |
1adf2230 | 2020 | if (since_last.count() > |
11fdf7f2 | 2021 | (g_conf()->mds_beacon_grace - g_conf()->mds_beacon_interval)) { |
7c673cae FG |
2022 | // This case handles either local slowness (calls being delayed |
2023 | // for whatever reason) or cluster election slowness (a long gap | |
2024 | // between calls while an election happened) | |
91327a77 | 2025 | dout(1) << __func__ << ": resetting beacon timeouts due to mon delay " |
7c673cae | 2026 | "(slow election?) of " << now - last_tick << " seconds" << dendl; |
1adf2230 AA |
2027 | for (auto &p : last_beacon) { |
2028 | p.second.stamp = now; | |
7c673cae FG |
2029 | } |
2030 | } | |
2031 | ||
2032 | last_tick = now; | |
2033 | ||
7c673cae | 2034 | // make sure last_beacon is fully populated |
28e407b8 | 2035 | for (auto &p : pending.mds_roles) { |
7c673cae | 2036 | auto &gid = p.first; |
1adf2230 AA |
2037 | last_beacon.emplace(std::piecewise_construct, |
2038 | std::forward_as_tuple(gid), | |
2039 | std::forward_as_tuple(mono_clock::now(), 0)); | |
7c673cae FG |
2040 | } |
2041 | ||
1adf2230 AA |
2042 | |
2043 | // check beacon timestamps | |
c07f9fc5 FG |
2044 | bool propose_osdmap = false; |
2045 | bool osdmap_writeable = mon->osdmon()->is_writeable(); | |
1adf2230 AA |
2046 | for (auto it = last_beacon.begin(); it != last_beacon.end(); ) { |
2047 | mds_gid_t gid = it->first; | |
2048 | auto beacon_info = it->second; | |
2049 | chrono::duration<double> since_last = now-beacon_info.stamp; | |
7c673cae | 2050 | |
28e407b8 | 2051 | if (!pending.gid_exists(gid)) { |
c07f9fc5 | 2052 | // clean it out |
1adf2230 | 2053 | it = last_beacon.erase(it); |
c07f9fc5 | 2054 | continue; |
7c673cae FG |
2055 | } |
2056 | ||
1adf2230 | 2057 | |
11fdf7f2 | 2058 | if (since_last.count() >= g_conf()->mds_beacon_grace) { |
28e407b8 | 2059 | auto &info = pending.get_info_gid(gid); |
c07f9fc5 | 2060 | dout(1) << "no beacon from mds." << info.rank << "." << info.inc |
11fdf7f2 | 2061 | << " (gid: " << gid << " addr: " << info.addrs |
c07f9fc5 | 2062 | << " state: " << ceph_mds_state_name(info.state) << ")" |
1adf2230 | 2063 | << " since " << since_last.count() << "s" << dendl; |
c07f9fc5 FG |
2064 | // If the OSDMap is writeable, we can blacklist things, so we can |
2065 | // try failing any laggy MDS daemons. Consider each one for failure. | |
2066 | if (osdmap_writeable) { | |
1adf2230 | 2067 | maybe_replace_gid(pending, gid, info, &do_propose, &propose_osdmap); |
c07f9fc5 | 2068 | } |
7c673cae | 2069 | } |
1adf2230 AA |
2070 | |
2071 | ++it; | |
7c673cae | 2072 | } |
c07f9fc5 FG |
2073 | if (propose_osdmap) { |
2074 | request_proposal(mon->osdmon()); | |
2075 | } | |
7c673cae | 2076 | |
28e407b8 | 2077 | for (auto &p : pending.filesystems) { |
11fdf7f2 | 2078 | do_propose |= maybe_promote_standby(pending, *p.second); |
7c673cae FG |
2079 | } |
2080 | ||
2081 | if (do_propose) { | |
2082 | propose_pending(); | |
2083 | } | |
2084 | } | |
2085 | ||
7c673cae FG |
2086 | MDSMonitor::MDSMonitor(Monitor *mn, Paxos *p, string service_name) |
2087 | : PaxosService(mn, p, service_name) | |
2088 | { | |
c07f9fc5 | 2089 | handlers = FileSystemCommandHandler::load(p); |
7c673cae FG |
2090 | } |
2091 | ||
2092 | void MDSMonitor::on_restart() | |
2093 | { | |
2094 | // Clear out the leader-specific state. | |
1adf2230 | 2095 | last_tick = mono_clock::now(); |
7c673cae FG |
2096 | last_beacon.clear(); |
2097 | } | |
2098 |