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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 | ||
f67539c2 TL |
42 | using namespace TOPNSPC::common; |
43 | ||
44 | using std::dec; | |
45 | using std::hex; | |
46 | using std::list; | |
47 | using std::map; | |
48 | using std::make_pair; | |
49 | using std::ostream; | |
50 | using std::ostringstream; | |
51 | using std::pair; | |
52 | using std::set; | |
53 | using std::string; | |
54 | using std::string_view; | |
55 | using std::stringstream; | |
56 | using std::to_string; | |
57 | using std::vector; | |
58 | ||
59 | using ceph::bufferlist; | |
60 | using ceph::decode; | |
61 | using ceph::encode; | |
62 | using ceph::ErasureCodeInterfaceRef; | |
63 | using ceph::ErasureCodeProfile; | |
64 | using ceph::Formatter; | |
65 | using ceph::JSONFormatter; | |
66 | using ceph::make_message; | |
67 | using ceph::mono_clock; | |
68 | using ceph::mono_time; | |
69 | ||
7c673cae FG |
70 | #define dout_subsys ceph_subsys_mon |
71 | #undef dout_prefix | |
28e407b8 | 72 | #define dout_prefix _prefix(_dout, mon, get_fsmap()) |
f67539c2 TL |
73 | static ostream& _prefix(std::ostream *_dout, Monitor &mon, const FSMap& fsmap) { |
74 | return *_dout << "mon." << mon.name << "@" << mon.rank | |
75 | << "(" << mon.get_state_name() | |
7c673cae FG |
76 | << ").mds e" << fsmap.get_epoch() << " "; |
77 | } | |
78 | ||
3efd9988 FG |
79 | static const string MDS_METADATA_PREFIX("mds_metadata"); |
80 | static const string MDS_HEALTH_PREFIX("mds_health"); | |
81 | ||
82 | ||
7c673cae FG |
83 | /* |
84 | * Specialized implementation of cmd_getval to allow us to parse | |
85 | * out strongly-typedef'd types | |
86 | */ | |
9f95a23c TL |
87 | namespace TOPNSPC::common { |
88 | template<> bool cmd_getval(const cmdmap_t& cmdmap, | |
31f18b77 | 89 | const std::string& k, mds_gid_t &val) |
7c673cae | 90 | { |
9f95a23c | 91 | return cmd_getval(cmdmap, k, (int64_t&)val); |
7c673cae FG |
92 | } |
93 | ||
9f95a23c | 94 | template<> bool cmd_getval(const cmdmap_t& cmdmap, |
31f18b77 | 95 | const std::string& k, mds_rank_t &val) |
7c673cae | 96 | { |
9f95a23c | 97 | return cmd_getval(cmdmap, k, (int64_t&)val); |
7c673cae FG |
98 | } |
99 | ||
9f95a23c | 100 | template<> bool cmd_getval(const cmdmap_t& cmdmap, |
31f18b77 | 101 | const std::string& k, MDSMap::DaemonState &val) |
7c673cae | 102 | { |
9f95a23c TL |
103 | return cmd_getval(cmdmap, k, (int64_t&)val); |
104 | } | |
7c673cae | 105 | } |
7c673cae FG |
106 | // my methods |
107 | ||
11fdf7f2 TL |
108 | template <int dblV> |
109 | void MDSMonitor::print_map(const FSMap& m) | |
7c673cae | 110 | { |
11fdf7f2 | 111 | dout(dblV) << "print_map\n"; |
7c673cae FG |
112 | m.print(*_dout); |
113 | *_dout << dendl; | |
114 | } | |
115 | ||
116 | // service methods | |
117 | void MDSMonitor::create_initial() | |
118 | { | |
119 | dout(10) << "create_initial" << dendl; | |
120 | } | |
121 | ||
11fdf7f2 | 122 | void MDSMonitor::get_store_prefixes(std::set<string>& s) const |
3efd9988 FG |
123 | { |
124 | s.insert(service_name); | |
125 | s.insert(MDS_METADATA_PREFIX); | |
126 | s.insert(MDS_HEALTH_PREFIX); | |
127 | } | |
7c673cae FG |
128 | |
129 | void MDSMonitor::update_from_paxos(bool *need_bootstrap) | |
130 | { | |
131 | version_t version = get_last_committed(); | |
28e407b8 | 132 | if (version == get_fsmap().epoch) |
7c673cae FG |
133 | return; |
134 | ||
135 | dout(10) << __func__ << " version " << version | |
28e407b8 | 136 | << ", my e " << get_fsmap().epoch << dendl; |
11fdf7f2 | 137 | ceph_assert(version > get_fsmap().epoch); |
7c673cae | 138 | |
224ce89b WB |
139 | load_health(); |
140 | ||
7c673cae FG |
141 | // read and decode |
142 | bufferlist fsmap_bl; | |
143 | fsmap_bl.clear(); | |
144 | int err = get_version(version, fsmap_bl); | |
11fdf7f2 | 145 | ceph_assert(err == 0); |
7c673cae | 146 | |
11fdf7f2 | 147 | ceph_assert(fsmap_bl.length() > 0); |
7c673cae | 148 | dout(10) << __func__ << " got " << version << dendl; |
28e407b8 | 149 | PaxosFSMap::decode(fsmap_bl); |
7c673cae FG |
150 | |
151 | // new map | |
91327a77 | 152 | dout(0) << "new map" << dendl; |
11fdf7f2 TL |
153 | print_map<0>(get_fsmap()); |
154 | if (!g_conf()->mon_mds_skip_sanity) { | |
28e407b8 | 155 | get_fsmap().sanity(); |
7c673cae FG |
156 | } |
157 | ||
158 | check_subs(); | |
7c673cae FG |
159 | } |
160 | ||
161 | void MDSMonitor::init() | |
162 | { | |
163 | (void)load_metadata(pending_metadata); | |
164 | } | |
165 | ||
166 | void MDSMonitor::create_pending() | |
167 | { | |
28e407b8 | 168 | auto &fsmap = PaxosFSMap::create_pending(); |
7c673cae | 169 | |
f67539c2 TL |
170 | if (mon.osdmon()->is_readable()) { |
171 | const auto &osdmap = mon.osdmon()->osdmap; | |
28e407b8 | 172 | fsmap.sanitize([&osdmap](int64_t pool){return osdmap.have_pg_pool(pool);}); |
3efd9988 FG |
173 | } |
174 | ||
28e407b8 | 175 | dout(10) << "create_pending e" << fsmap.epoch << dendl; |
7c673cae FG |
176 | } |
177 | ||
178 | void MDSMonitor::encode_pending(MonitorDBStore::TransactionRef t) | |
179 | { | |
28e407b8 AA |
180 | auto &pending = get_pending_fsmap_writeable(); |
181 | auto &epoch = pending.epoch; | |
7c673cae | 182 | |
28e407b8 | 183 | dout(10) << "encode_pending e" << epoch << dendl; |
7c673cae FG |
184 | |
185 | // print map iff 'debug mon = 30' or higher | |
11fdf7f2 TL |
186 | print_map<30>(pending); |
187 | if (!g_conf()->mon_mds_skip_sanity) { | |
28e407b8 | 188 | pending.sanity(); |
7c673cae FG |
189 | } |
190 | ||
191 | // Set 'modified' on maps modified this epoch | |
28e407b8 AA |
192 | for (auto &p : pending.filesystems) { |
193 | if (p.second->mds_map.epoch == epoch) { | |
194 | p.second->mds_map.modified = ceph_clock_now(); | |
7c673cae FG |
195 | } |
196 | } | |
197 | ||
198 | // apply to paxos | |
11fdf7f2 | 199 | ceph_assert(get_last_committed() + 1 == pending.epoch); |
28e407b8 | 200 | bufferlist pending_bl; |
f67539c2 | 201 | pending.encode(pending_bl, mon.get_quorum_con_features()); |
7c673cae FG |
202 | |
203 | /* put everything in the transaction */ | |
28e407b8 AA |
204 | put_version(t, pending.epoch, pending_bl); |
205 | put_last_committed(t, pending.epoch); | |
7c673cae FG |
206 | |
207 | // Encode MDSHealth data | |
208 | for (std::map<uint64_t, MDSHealth>::iterator i = pending_daemon_health.begin(); | |
209 | i != pending_daemon_health.end(); ++i) { | |
210 | bufferlist bl; | |
211 | i->second.encode(bl); | |
212 | t->put(MDS_HEALTH_PREFIX, stringify(i->first), bl); | |
213 | } | |
214 | ||
215 | for (std::set<uint64_t>::iterator i = pending_daemon_health_rm.begin(); | |
216 | i != pending_daemon_health_rm.end(); ++i) { | |
217 | t->erase(MDS_HEALTH_PREFIX, stringify(*i)); | |
218 | } | |
219 | pending_daemon_health_rm.clear(); | |
1adf2230 | 220 | remove_from_metadata(pending, t); |
224ce89b WB |
221 | |
222 | // health | |
223 | health_check_map_t new_checks; | |
28e407b8 | 224 | const auto &info_map = pending.get_mds_info(); |
224ce89b WB |
225 | for (const auto &i : info_map) { |
226 | const auto &gid = i.first; | |
227 | const auto &info = i.second; | |
228 | if (pending_daemon_health_rm.count(gid)) { | |
229 | continue; | |
230 | } | |
231 | MDSHealth health; | |
232 | auto p = pending_daemon_health.find(gid); | |
233 | if (p != pending_daemon_health.end()) { | |
234 | health = p->second; | |
235 | } else { | |
236 | bufferlist bl; | |
f67539c2 | 237 | mon.store->get(MDS_HEALTH_PREFIX, stringify(gid), bl); |
224ce89b WB |
238 | if (!bl.length()) { |
239 | derr << "Missing health data for MDS " << gid << dendl; | |
240 | continue; | |
241 | } | |
11fdf7f2 | 242 | auto bl_i = bl.cbegin(); |
224ce89b WB |
243 | health.decode(bl_i); |
244 | } | |
245 | for (const auto &metric : health.metrics) { | |
9f95a23c | 246 | const auto rank = info.rank; |
224ce89b WB |
247 | health_check_t *check = &new_checks.get_or_add( |
248 | mds_metric_name(metric.type), | |
249 | metric.sev, | |
9f95a23c TL |
250 | mds_metric_summary(metric.type), |
251 | 1); | |
224ce89b | 252 | ostringstream ss; |
f91f0fd5 | 253 | ss << "mds." << info.name << "(mds." << rank << "): " << metric.message; |
28e407b8 AA |
254 | bool first = true; |
255 | for (auto &p : metric.metadata) { | |
256 | if (first) { | |
257 | ss << " "; | |
258 | } else { | |
224ce89b | 259 | ss << ", "; |
28e407b8 AA |
260 | } |
261 | ss << p.first << ": " << p.second; | |
262 | first = false; | |
224ce89b WB |
263 | } |
264 | check->detail.push_back(ss.str()); | |
265 | } | |
266 | } | |
28e407b8 | 267 | pending.get_health_checks(&new_checks); |
224ce89b | 268 | for (auto& p : new_checks.checks) { |
11fdf7f2 | 269 | p.second.summary = std::regex_replace( |
224ce89b | 270 | p.second.summary, |
11fdf7f2 | 271 | std::regex("%num%"), |
224ce89b | 272 | stringify(p.second.detail.size())); |
11fdf7f2 | 273 | p.second.summary = std::regex_replace( |
224ce89b | 274 | p.second.summary, |
11fdf7f2 | 275 | std::regex("%plurals%"), |
224ce89b | 276 | p.second.detail.size() > 1 ? "s" : ""); |
11fdf7f2 | 277 | p.second.summary = std::regex_replace( |
224ce89b | 278 | p.second.summary, |
11fdf7f2 | 279 | std::regex("%isorare%"), |
224ce89b | 280 | p.second.detail.size() > 1 ? "are" : "is"); |
11fdf7f2 | 281 | p.second.summary = std::regex_replace( |
181888fb | 282 | p.second.summary, |
11fdf7f2 | 283 | std::regex("%hasorhave%"), |
181888fb | 284 | p.second.detail.size() > 1 ? "have" : "has"); |
224ce89b WB |
285 | } |
286 | encode_health(new_checks, t); | |
7c673cae FG |
287 | } |
288 | ||
11fdf7f2 | 289 | version_t MDSMonitor::get_trim_to() const |
7c673cae FG |
290 | { |
291 | version_t floor = 0; | |
11fdf7f2 TL |
292 | if (g_conf()->mon_mds_force_trim_to > 0 && |
293 | g_conf()->mon_mds_force_trim_to < (int)get_last_committed()) { | |
294 | floor = g_conf()->mon_mds_force_trim_to; | |
7c673cae FG |
295 | dout(10) << __func__ << " explicit mon_mds_force_trim_to = " |
296 | << floor << dendl; | |
297 | } | |
298 | ||
11fdf7f2 | 299 | unsigned max = g_conf()->mon_max_mdsmap_epochs; |
7c673cae FG |
300 | version_t last = get_last_committed(); |
301 | ||
302 | if (last - get_first_committed() > max && floor < last - max) | |
303 | return last - max; | |
304 | return floor; | |
305 | } | |
306 | ||
7c673cae FG |
307 | bool MDSMonitor::preprocess_query(MonOpRequestRef op) |
308 | { | |
309 | op->mark_mdsmon_event(__func__); | |
9f95a23c | 310 | auto m = op->get_req<PaxosServiceMessage>(); |
11fdf7f2 TL |
311 | dout(10) << "preprocess_query " << *m << " from " << m->get_orig_source() |
312 | << " " << m->get_orig_source_addrs() << dendl; | |
7c673cae FG |
313 | |
314 | switch (m->get_type()) { | |
315 | ||
316 | case MSG_MDS_BEACON: | |
317 | return preprocess_beacon(op); | |
318 | ||
319 | case MSG_MON_COMMAND: | |
f64942e4 AA |
320 | try { |
321 | return preprocess_command(op); | |
11fdf7f2 | 322 | } catch (const bad_cmd_get& e) { |
f64942e4 | 323 | bufferlist bl; |
f67539c2 | 324 | mon.reply_command(op, -EINVAL, e.what(), bl, get_last_committed()); |
f64942e4 AA |
325 | return true; |
326 | } | |
7c673cae FG |
327 | |
328 | case MSG_MDS_OFFLOAD_TARGETS: | |
329 | return preprocess_offload_targets(op); | |
330 | ||
331 | default: | |
332 | ceph_abort(); | |
333 | return true; | |
334 | } | |
335 | } | |
336 | ||
337 | void MDSMonitor::_note_beacon(MMDSBeacon *m) | |
338 | { | |
339 | mds_gid_t gid = mds_gid_t(m->get_global_id()); | |
340 | version_t seq = m->get_seq(); | |
341 | ||
91327a77 | 342 | dout(5) << "_note_beacon " << *m << " noting time" << dendl; |
1adf2230 AA |
343 | auto &beacon = last_beacon[gid]; |
344 | beacon.stamp = mono_clock::now(); | |
345 | beacon.seq = seq; | |
7c673cae FG |
346 | } |
347 | ||
348 | bool MDSMonitor::preprocess_beacon(MonOpRequestRef op) | |
349 | { | |
350 | op->mark_mdsmon_event(__func__); | |
9f95a23c | 351 | auto m = op->get_req<MMDSBeacon>(); |
7c673cae FG |
352 | MDSMap::DaemonState state = m->get_state(); |
353 | mds_gid_t gid = m->get_global_id(); | |
354 | version_t seq = m->get_seq(); | |
355 | MDSMap::mds_info_t info; | |
356 | epoch_t effective_epoch = 0; | |
357 | ||
1adf2230 | 358 | const auto &fsmap = get_fsmap(); |
28e407b8 | 359 | |
7c673cae | 360 | // check privileges, ignore if fails |
11fdf7f2 TL |
361 | MonSession *session = op->get_session(); |
362 | if (!session) | |
363 | goto ignore; | |
7c673cae FG |
364 | if (!session->is_capable("mds", MON_CAP_X)) { |
365 | dout(0) << "preprocess_beacon got MMDSBeacon from entity with insufficient privileges " | |
366 | << session->caps << dendl; | |
367 | goto ignore; | |
368 | } | |
369 | ||
f67539c2 TL |
370 | if (m->get_fsid() != mon.monmap->fsid) { |
371 | dout(0) << "preprocess_beacon on fsid " << m->get_fsid() << " != " << mon.monmap->fsid << dendl; | |
7c673cae FG |
372 | goto ignore; |
373 | } | |
374 | ||
91327a77 | 375 | dout(5) << "preprocess_beacon " << *m |
11fdf7f2 TL |
376 | << " from " << m->get_orig_source() |
377 | << " " << m->get_orig_source_addrs() | |
7c673cae FG |
378 | << " " << m->get_compat() |
379 | << dendl; | |
380 | ||
381 | // make sure the address has a port | |
382 | if (m->get_orig_source_addr().get_port() == 0) { | |
383 | dout(1) << " ignoring boot message without a port" << dendl; | |
384 | goto ignore; | |
385 | } | |
386 | ||
387 | // check compat | |
388 | if (!m->get_compat().writeable(fsmap.compat)) { | |
11fdf7f2 TL |
389 | dout(1) << " mds " << m->get_orig_source() |
390 | << " " << m->get_orig_source_addrs() | |
391 | << " can't write to fsmap " << fsmap.compat << dendl; | |
7c673cae FG |
392 | goto ignore; |
393 | } | |
394 | ||
395 | // fw to leader? | |
28e407b8 | 396 | if (!is_leader()) |
7c673cae FG |
397 | return false; |
398 | ||
399 | // booted, but not in map? | |
28e407b8 | 400 | if (!fsmap.gid_exists(gid)) { |
7c673cae FG |
401 | if (state != MDSMap::STATE_BOOT) { |
402 | dout(7) << "mds_beacon " << *m << " is not in fsmap (state " | |
403 | << ceph_mds_state_name(state) << ")" << dendl; | |
404 | ||
1adf2230 AA |
405 | /* We can't send an MDSMap this MDS was a part of because we no longer |
406 | * know which FS it was part of. Nor does this matter. Sending an empty | |
407 | * MDSMap is sufficient for getting the MDS to respawn. | |
408 | */ | |
7c673cae FG |
409 | MDSMap null_map; |
410 | null_map.epoch = fsmap.epoch; | |
411 | null_map.compat = fsmap.compat; | |
f67539c2 TL |
412 | auto m = make_message<MMDSMap>(mon.monmap->fsid, null_map); |
413 | mon.send_reply(op, m.detach()); | |
7c673cae FG |
414 | return true; |
415 | } else { | |
416 | return false; // not booted yet. | |
417 | } | |
418 | } | |
419 | dout(10) << __func__ << ": GID exists in map: " << gid << dendl; | |
28e407b8 | 420 | info = fsmap.get_info_gid(gid); |
7c673cae | 421 | |
f91f0fd5 TL |
422 | if (state == MDSMap::STATE_DNE) { |
423 | return false; | |
424 | } | |
425 | ||
7c673cae FG |
426 | // old seq? |
427 | if (info.state_seq > seq) { | |
428 | dout(7) << "mds_beacon " << *m << " has old seq, ignoring" << dendl; | |
429 | goto ignore; | |
430 | } | |
431 | ||
432 | // Work out the latest epoch that this daemon should have seen | |
433 | { | |
28e407b8 | 434 | fs_cluster_id_t fscid = fsmap.mds_roles.at(gid); |
7c673cae | 435 | if (fscid == FS_CLUSTER_ID_NONE) { |
28e407b8 | 436 | effective_epoch = fsmap.standby_epochs.at(gid); |
7c673cae | 437 | } else { |
28e407b8 | 438 | effective_epoch = fsmap.get_filesystem(fscid)->mds_map.epoch; |
7c673cae FG |
439 | } |
440 | if (effective_epoch != m->get_last_epoch_seen()) { | |
441 | dout(10) << "mds_beacon " << *m | |
442 | << " ignoring requested state, because mds hasn't seen latest map" << dendl; | |
443 | goto reply; | |
444 | } | |
445 | } | |
446 | ||
447 | if (info.laggy()) { | |
448 | _note_beacon(m); | |
449 | return false; // no longer laggy, need to update map. | |
450 | } | |
451 | if (state == MDSMap::STATE_BOOT) { | |
452 | // ignore, already booted. | |
453 | goto ignore; | |
454 | } | |
9f95a23c TL |
455 | |
456 | // did the join_fscid change | |
457 | if (m->get_fs().size()) { | |
458 | fs_cluster_id_t fscid = FS_CLUSTER_ID_NONE; | |
459 | auto f = fsmap.get_filesystem(m->get_fs()); | |
460 | if (f) { | |
461 | fscid = f->fscid; | |
462 | } | |
463 | if (info.join_fscid != fscid) { | |
464 | dout(10) << __func__ << " standby mds_join_fs changed to " << fscid | |
465 | << " (" << m->get_fs() << ")" << dendl; | |
466 | _note_beacon(m); | |
467 | return false; | |
468 | } | |
469 | } else { | |
470 | if (info.join_fscid != FS_CLUSTER_ID_NONE) { | |
471 | dout(10) << __func__ << " standby mds_join_fs was cleared" << dendl; | |
472 | _note_beacon(m); | |
473 | return false; | |
474 | } | |
475 | } | |
476 | ||
7c673cae FG |
477 | // is there a state change here? |
478 | if (info.state != state) { | |
479 | // legal state change? | |
480 | if ((info.state == MDSMap::STATE_STANDBY || | |
481 | info.state == MDSMap::STATE_STANDBY_REPLAY) && state > 0) { | |
482 | dout(10) << "mds_beacon mds can't activate itself (" << ceph_mds_state_name(info.state) | |
483 | << " -> " << ceph_mds_state_name(state) << ")" << dendl; | |
484 | goto reply; | |
485 | } | |
486 | ||
487 | if ((state == MDSMap::STATE_STANDBY || state == MDSMap::STATE_STANDBY_REPLAY) | |
488 | && info.rank != MDS_RANK_NONE) | |
489 | { | |
490 | dout(4) << "mds_beacon MDS can't go back into standby after taking rank: " | |
491 | "held rank " << info.rank << " while requesting state " | |
492 | << ceph_mds_state_name(state) << dendl; | |
493 | goto reply; | |
494 | } | |
495 | ||
496 | _note_beacon(m); | |
497 | return false; | |
498 | } | |
499 | ||
500 | // Comparing known daemon health with m->get_health() | |
501 | // and return false (i.e. require proposal) if they | |
502 | // do not match, to update our stored | |
503 | if (!(pending_daemon_health[gid] == m->get_health())) { | |
91327a77 | 504 | dout(10) << __func__ << " health metrics for gid " << gid << " were updated" << dendl; |
7c673cae FG |
505 | _note_beacon(m); |
506 | return false; | |
507 | } | |
508 | ||
509 | reply: | |
510 | // note time and reply | |
11fdf7f2 | 511 | ceph_assert(effective_epoch > 0); |
7c673cae | 512 | _note_beacon(m); |
11fdf7f2 | 513 | { |
f67539c2 | 514 | auto beacon = make_message<MMDSBeacon>(mon.monmap->fsid, |
11fdf7f2 TL |
515 | m->get_global_id(), m->get_name(), effective_epoch, |
516 | state, seq, CEPH_FEATURES_SUPPORTED_DEFAULT); | |
f67539c2 | 517 | mon.send_reply(op, beacon.detach()); |
11fdf7f2 | 518 | } |
7c673cae FG |
519 | return true; |
520 | ||
521 | ignore: | |
522 | // I won't reply this beacon, drop it. | |
f67539c2 | 523 | mon.no_reply(op); |
7c673cae FG |
524 | return true; |
525 | } | |
526 | ||
527 | bool MDSMonitor::preprocess_offload_targets(MonOpRequestRef op) | |
528 | { | |
529 | op->mark_mdsmon_event(__func__); | |
9f95a23c | 530 | auto m = op->get_req<MMDSLoadTargets>(); |
7c673cae | 531 | dout(10) << "preprocess_offload_targets " << *m << " from " << m->get_orig_source() << dendl; |
28e407b8 | 532 | |
1adf2230 | 533 | const auto &fsmap = get_fsmap(); |
7c673cae FG |
534 | |
535 | // check privileges, ignore message if fails | |
11fdf7f2 | 536 | MonSession *session = op->get_session(); |
7c673cae | 537 | if (!session) |
1adf2230 | 538 | goto ignore; |
7c673cae FG |
539 | if (!session->is_capable("mds", MON_CAP_X)) { |
540 | dout(0) << "preprocess_offload_targets got MMDSLoadTargets from entity with insufficient caps " | |
541 | << session->caps << dendl; | |
1adf2230 | 542 | goto ignore; |
7c673cae FG |
543 | } |
544 | ||
545 | if (fsmap.gid_exists(m->global_id) && | |
546 | m->targets == fsmap.get_info_gid(m->global_id).export_targets) | |
1adf2230 | 547 | goto ignore; |
7c673cae FG |
548 | |
549 | return false; | |
550 | ||
1adf2230 | 551 | ignore: |
f67539c2 | 552 | mon.no_reply(op); |
7c673cae FG |
553 | return true; |
554 | } | |
555 | ||
556 | ||
557 | bool MDSMonitor::prepare_update(MonOpRequestRef op) | |
558 | { | |
559 | op->mark_mdsmon_event(__func__); | |
9f95a23c | 560 | auto m = op->get_req<PaxosServiceMessage>(); |
7c673cae FG |
561 | dout(7) << "prepare_update " << *m << dendl; |
562 | ||
563 | switch (m->get_type()) { | |
564 | ||
565 | case MSG_MDS_BEACON: | |
566 | return prepare_beacon(op); | |
567 | ||
568 | case MSG_MON_COMMAND: | |
f64942e4 AA |
569 | try { |
570 | return prepare_command(op); | |
11fdf7f2 | 571 | } catch (const bad_cmd_get& e) { |
f64942e4 | 572 | bufferlist bl; |
f67539c2 | 573 | mon.reply_command(op, -EINVAL, e.what(), bl, get_last_committed()); |
f64942e4 AA |
574 | return true; |
575 | } | |
7c673cae FG |
576 | |
577 | case MSG_MDS_OFFLOAD_TARGETS: | |
578 | return prepare_offload_targets(op); | |
579 | ||
580 | default: | |
581 | ceph_abort(); | |
582 | } | |
583 | ||
584 | return true; | |
585 | } | |
586 | ||
587 | bool MDSMonitor::prepare_beacon(MonOpRequestRef op) | |
588 | { | |
589 | op->mark_mdsmon_event(__func__); | |
9f95a23c | 590 | auto m = op->get_req<MMDSBeacon>(); |
7c673cae | 591 | // -- this is an update -- |
11fdf7f2 TL |
592 | dout(12) << "prepare_beacon " << *m << " from " << m->get_orig_source() |
593 | << " " << m->get_orig_source_addrs() << dendl; | |
594 | entity_addrvec_t addrs = m->get_orig_source_addrs(); | |
7c673cae FG |
595 | mds_gid_t gid = m->get_global_id(); |
596 | MDSMap::DaemonState state = m->get_state(); | |
597 | version_t seq = m->get_seq(); | |
598 | ||
28e407b8 AA |
599 | auto &pending = get_pending_fsmap_writeable(); |
600 | ||
91327a77 | 601 | dout(15) << __func__ << " got health from gid " << gid << " with " << m->get_health().metrics.size() << " metrics." << dendl; |
7c673cae FG |
602 | |
603 | // Calculate deltas of health metrics created and removed | |
604 | // Do this by type rather than MDSHealthMetric equality, because messages can | |
605 | // change a lot when they include e.g. a number of items. | |
606 | const auto &old_health = pending_daemon_health[gid].metrics; | |
607 | const auto &new_health = m->get_health().metrics; | |
608 | ||
609 | std::set<mds_metric_t> old_types; | |
610 | for (const auto &i : old_health) { | |
611 | old_types.insert(i.type); | |
612 | } | |
613 | ||
614 | std::set<mds_metric_t> new_types; | |
615 | for (const auto &i : new_health) { | |
616 | new_types.insert(i.type); | |
617 | } | |
618 | ||
619 | for (const auto &new_metric: new_health) { | |
620 | if (old_types.count(new_metric.type) == 0) { | |
11fdf7f2 | 621 | dout(10) << "MDS health message (" << m->get_orig_source() |
28e407b8 | 622 | << "): " << new_metric.sev << " " << new_metric.message << dendl; |
7c673cae FG |
623 | } |
624 | } | |
625 | ||
626 | // Log the disappearance of health messages at INFO | |
627 | for (const auto &old_metric : old_health) { | |
628 | if (new_types.count(old_metric.type) == 0) { | |
f67539c2 | 629 | mon.clog->info() << "MDS health message cleared (" |
11fdf7f2 | 630 | << m->get_orig_source() << "): " << old_metric.message; |
7c673cae FG |
631 | } |
632 | } | |
633 | ||
634 | // Store health | |
635 | pending_daemon_health[gid] = m->get_health(); | |
636 | ||
637 | // boot? | |
638 | if (state == MDSMap::STATE_BOOT) { | |
639 | // zap previous instance of this name? | |
11fdf7f2 | 640 | if (g_conf()->mds_enforce_unique_name) { |
7c673cae | 641 | bool failed_mds = false; |
28e407b8 | 642 | while (mds_gid_t existing = pending.find_mds_gid_by_name(m->get_name())) { |
f67539c2 TL |
643 | if (!mon.osdmon()->is_writeable()) { |
644 | mon.osdmon()->wait_for_writeable(op, new C_RetryMessage(this, op)); | |
7c673cae FG |
645 | return false; |
646 | } | |
d2e6a577 | 647 | const MDSMap::mds_info_t &existing_info = |
28e407b8 | 648 | pending.get_info_gid(existing); |
f67539c2 | 649 | mon.clog->info() << existing_info.human_name() << " restarted"; |
1adf2230 | 650 | fail_mds_gid(pending, existing); |
7c673cae FG |
651 | failed_mds = true; |
652 | } | |
653 | if (failed_mds) { | |
f67539c2 TL |
654 | ceph_assert(mon.osdmon()->is_writeable()); |
655 | request_proposal(mon.osdmon()); | |
7c673cae FG |
656 | } |
657 | } | |
658 | ||
659 | // Add this daemon to the map | |
28e407b8 | 660 | if (pending.mds_roles.count(gid) == 0) { |
7c673cae FG |
661 | MDSMap::mds_info_t new_info; |
662 | new_info.global_id = gid; | |
663 | new_info.name = m->get_name(); | |
11fdf7f2 | 664 | new_info.addrs = addrs; |
7c673cae FG |
665 | new_info.mds_features = m->get_mds_features(); |
666 | new_info.state = MDSMap::STATE_STANDBY; | |
667 | new_info.state_seq = seq; | |
28e407b8 | 668 | pending.insert(new_info); |
9f95a23c TL |
669 | if (m->get_fs().size()) { |
670 | fs_cluster_id_t fscid = FS_CLUSTER_ID_NONE; | |
671 | auto f = pending.get_filesystem(m->get_fs()); | |
672 | if (f) { | |
673 | fscid = f->fscid; | |
674 | } | |
675 | new_info.join_fscid = fscid; | |
676 | } | |
7c673cae FG |
677 | } |
678 | ||
7c673cae | 679 | // initialize the beacon timer |
1adf2230 AA |
680 | auto &beacon = last_beacon[gid]; |
681 | beacon.stamp = mono_clock::now(); | |
682 | beacon.seq = seq; | |
7c673cae FG |
683 | |
684 | // new incompat? | |
28e407b8 AA |
685 | if (!pending.compat.writeable(m->get_compat())) { |
686 | dout(10) << " fsmap " << pending.compat | |
7c673cae FG |
687 | << " can't write to new mds' " << m->get_compat() |
688 | << ", updating fsmap and killing old mds's" | |
689 | << dendl; | |
28e407b8 | 690 | pending.update_compat(m->get_compat()); |
7c673cae FG |
691 | } |
692 | ||
693 | update_metadata(m->get_global_id(), m->get_sys_info()); | |
694 | } else { | |
695 | // state update | |
91327a77 AA |
696 | |
697 | if (!pending.gid_exists(gid)) { | |
698 | /* gid has been removed from pending, send null map */ | |
699 | dout(5) << "mds_beacon " << *m << " is not in fsmap (state " | |
700 | << ceph_mds_state_name(state) << ")" << dendl; | |
701 | ||
702 | /* We can't send an MDSMap this MDS was a part of because we no longer | |
703 | * know which FS it was part of. Nor does this matter. Sending an empty | |
704 | * MDSMap is sufficient for getting the MDS to respawn. | |
705 | */ | |
9f95a23c | 706 | wait_for_finished_proposal(op, new LambdaContext([op, this](int r){ |
91327a77 AA |
707 | if (r >= 0) { |
708 | const auto& fsmap = get_fsmap(); | |
709 | MDSMap null_map; | |
710 | null_map.epoch = fsmap.epoch; | |
711 | null_map.compat = fsmap.compat; | |
f67539c2 TL |
712 | auto m = make_message<MMDSMap>(mon.monmap->fsid, null_map); |
713 | mon.send_reply(op, m.detach()); | |
91327a77 AA |
714 | } else { |
715 | dispatch(op); // try again | |
716 | } | |
717 | })); | |
718 | return true; | |
719 | } | |
720 | ||
11fdf7f2 | 721 | const auto& info = pending.get_info_gid(gid); |
f64942e4 AA |
722 | if (info.state == MDSMap::STATE_STOPPING && |
723 | state != MDSMap::STATE_STOPPING && | |
724 | state != MDSMap::STATE_STOPPED) { | |
7c673cae FG |
725 | // we can't transition to any other states from STOPPING |
726 | dout(0) << "got beacon for MDS in STATE_STOPPING, ignoring requested state change" | |
727 | << dendl; | |
728 | _note_beacon(m); | |
729 | return true; | |
730 | } | |
731 | ||
732 | if (info.laggy()) { | |
11fdf7f2 TL |
733 | dout(1) << "prepare_beacon clearing laggy flag on " << addrs << dendl; |
734 | pending.modify_daemon(info.global_id, [](auto& info) | |
7c673cae | 735 | { |
11fdf7f2 | 736 | info.clear_laggy(); |
7c673cae FG |
737 | } |
738 | ); | |
739 | } | |
9f95a23c | 740 | |
91327a77 | 741 | dout(5) << "prepare_beacon mds." << info.rank |
7c673cae FG |
742 | << " " << ceph_mds_state_name(info.state) |
743 | << " -> " << ceph_mds_state_name(state) | |
7c673cae | 744 | << dendl; |
9f95a23c TL |
745 | |
746 | fs_cluster_id_t fscid = FS_CLUSTER_ID_NONE; | |
747 | if (m->get_fs().size()) { | |
748 | auto f = pending.get_filesystem(m->get_fs()); | |
749 | if (f) { | |
750 | fscid = f->fscid; | |
751 | } | |
752 | } | |
753 | pending.modify_daemon(gid, [fscid](auto& info) { | |
754 | info.join_fscid = fscid; | |
755 | }); | |
756 | ||
7c673cae | 757 | if (state == MDSMap::STATE_STOPPED) { |
28e407b8 AA |
758 | const auto fscid = pending.mds_roles.at(gid); |
759 | const auto &fs = pending.get_filesystem(fscid); | |
181888fb | 760 | |
f67539c2 | 761 | mon.clog->info() << info.human_name() << " finished " |
11fdf7f2 | 762 | << "stopping rank " << info.rank << " in filesystem " |
d2e6a577 | 763 | << fs->mds_map.fs_name << " (now has " |
181888fb | 764 | << fs->mds_map.get_num_in_mds() - 1 << " ranks)"; |
d2e6a577 | 765 | |
28e407b8 | 766 | auto erased = pending.stop(gid); |
7c673cae FG |
767 | erased.push_back(gid); |
768 | ||
9f95a23c | 769 | for (const auto& erased_gid : erased) { |
7c673cae FG |
770 | last_beacon.erase(erased_gid); |
771 | if (pending_daemon_health.count(erased_gid)) { | |
772 | pending_daemon_health.erase(erased_gid); | |
773 | pending_daemon_health_rm.insert(erased_gid); | |
774 | } | |
775 | } | |
d2e6a577 FG |
776 | |
777 | ||
7c673cae | 778 | } else if (state == MDSMap::STATE_DAMAGED) { |
f67539c2 | 779 | if (!mon.osdmon()->is_writeable()) { |
91327a77 | 780 | dout(1) << __func__ << ": DAMAGED from rank " << info.rank |
f67539c2 TL |
781 | << " waiting for osdmon writeable to blocklist it" << dendl; |
782 | mon.osdmon()->wait_for_writeable(op, new C_RetryMessage(this, op)); | |
7c673cae FG |
783 | return false; |
784 | } | |
785 | ||
786 | // Record this MDS rank as damaged, so that other daemons | |
787 | // won't try to run it. | |
91327a77 | 788 | dout(0) << __func__ << ": marking rank " |
7c673cae FG |
789 | << info.rank << " damaged" << dendl; |
790 | ||
791 | utime_t until = ceph_clock_now(); | |
f67539c2 TL |
792 | until += g_conf().get_val<double>("mon_mds_blocklist_interval"); |
793 | const auto blocklist_epoch = mon.osdmon()->blocklist(info.addrs, until); | |
794 | request_proposal(mon.osdmon()); | |
795 | pending.damaged(gid, blocklist_epoch); | |
7c673cae FG |
796 | last_beacon.erase(gid); |
797 | ||
798 | // Respond to MDS, so that it knows it can continue to shut down | |
9f95a23c | 799 | auto beacon = make_message<MMDSBeacon>( |
f67539c2 | 800 | mon.monmap->fsid, m->get_global_id(), |
28e407b8 | 801 | m->get_name(), pending.get_epoch(), state, seq, |
11fdf7f2 | 802 | CEPH_FEATURES_SUPPORTED_DEFAULT); |
f67539c2 | 803 | mon.send_reply(op, beacon.detach()); |
7c673cae | 804 | } else if (state == MDSMap::STATE_DNE) { |
f67539c2 | 805 | if (!mon.osdmon()->is_writeable()) { |
91327a77 | 806 | dout(1) << __func__ << ": DNE from rank " << info.rank |
f67539c2 TL |
807 | << " waiting for osdmon writeable to blocklist it" << dendl; |
808 | mon.osdmon()->wait_for_writeable(op, new C_RetryMessage(this, op)); | |
7c673cae FG |
809 | return false; |
810 | } | |
811 | ||
1adf2230 | 812 | fail_mds_gid(pending, gid); |
f67539c2 TL |
813 | ceph_assert(mon.osdmon()->is_writeable()); |
814 | request_proposal(mon.osdmon()); | |
7c673cae FG |
815 | |
816 | // Respond to MDS, so that it knows it can continue to shut down | |
f67539c2 | 817 | auto beacon = make_message<MMDSBeacon>(mon.monmap->fsid, |
11fdf7f2 TL |
818 | m->get_global_id(), m->get_name(), pending.get_epoch(), state, seq, |
819 | CEPH_FEATURES_SUPPORTED_DEFAULT); | |
f67539c2 | 820 | mon.send_reply(op, beacon.detach()); |
7c673cae FG |
821 | } else if (info.state == MDSMap::STATE_STANDBY && state != info.state) { |
822 | // Standby daemons should never modify their own | |
823 | // state. Reject any attempts to do so. | |
824 | derr << "standby " << gid << " attempted to change state to " | |
825 | << ceph_mds_state_name(state) << ", rejecting" << dendl; | |
826 | return true; | |
827 | } else if (info.state != MDSMap::STATE_STANDBY && state != info.state && | |
828 | !MDSMap::state_transition_valid(info.state, state)) { | |
829 | // Validate state transitions for daemons that hold a rank | |
830 | derr << "daemon " << gid << " (rank " << info.rank << ") " | |
831 | << "reported invalid state transition " | |
832 | << ceph_mds_state_name(info.state) << " -> " | |
833 | << ceph_mds_state_name(state) << dendl; | |
834 | return true; | |
835 | } else { | |
b32b8144 | 836 | if (info.state != MDSMap::STATE_ACTIVE && state == MDSMap::STATE_ACTIVE) { |
28e407b8 AA |
837 | const auto &fscid = pending.mds_roles.at(gid); |
838 | const auto &fs = pending.get_filesystem(fscid); | |
f67539c2 | 839 | mon.clog->info() << info.human_name() << " is now active in " |
d2e6a577 FG |
840 | << "filesystem " << fs->mds_map.fs_name << " as rank " |
841 | << info.rank; | |
842 | } | |
b32b8144 FG |
843 | |
844 | // Made it through special cases and validations, record the | |
845 | // daemon's reported state to the FSMap. | |
11fdf7f2 TL |
846 | pending.modify_daemon(gid, [state, seq](auto& info) { |
847 | info.state = state; | |
848 | info.state_seq = seq; | |
b32b8144 | 849 | }); |
7c673cae FG |
850 | } |
851 | } | |
852 | ||
91327a77 | 853 | dout(5) << "prepare_beacon pending map now:" << dendl; |
28e407b8 | 854 | print_map(pending); |
7c673cae | 855 | |
9f95a23c | 856 | wait_for_finished_proposal(op, new LambdaContext([op, this](int r){ |
7c673cae FG |
857 | if (r >= 0) |
858 | _updated(op); // success | |
859 | else if (r == -ECANCELED) { | |
f67539c2 | 860 | mon.no_reply(op); |
7c673cae FG |
861 | } else { |
862 | dispatch(op); // try again | |
863 | } | |
864 | })); | |
865 | ||
866 | return true; | |
867 | } | |
868 | ||
869 | bool MDSMonitor::prepare_offload_targets(MonOpRequestRef op) | |
870 | { | |
28e407b8 AA |
871 | auto &pending = get_pending_fsmap_writeable(); |
872 | ||
7c673cae | 873 | op->mark_mdsmon_event(__func__); |
9f95a23c | 874 | auto m = op->get_req<MMDSLoadTargets>(); |
7c673cae | 875 | mds_gid_t gid = m->global_id; |
28e407b8 | 876 | if (pending.gid_has_rank(gid)) { |
7c673cae | 877 | dout(10) << "prepare_offload_targets " << gid << " " << m->targets << dendl; |
28e407b8 | 878 | pending.update_export_targets(gid, m->targets); |
7c673cae FG |
879 | } else { |
880 | dout(10) << "prepare_offload_targets " << gid << " not in map" << dendl; | |
881 | } | |
f67539c2 | 882 | mon.no_reply(op); |
7c673cae FG |
883 | return true; |
884 | } | |
885 | ||
886 | bool MDSMonitor::should_propose(double& delay) | |
887 | { | |
888 | // delegate to PaxosService to assess whether we should propose | |
889 | return PaxosService::should_propose(delay); | |
890 | } | |
891 | ||
892 | void MDSMonitor::_updated(MonOpRequestRef op) | |
893 | { | |
28e407b8 | 894 | const auto &fsmap = get_fsmap(); |
7c673cae | 895 | op->mark_mdsmon_event(__func__); |
9f95a23c | 896 | auto m = op->get_req<MMDSBeacon>(); |
7c673cae | 897 | dout(10) << "_updated " << m->get_orig_source() << " " << *m << dendl; |
f67539c2 | 898 | mon.clog->debug() << m->get_orig_source() << " " |
11fdf7f2 TL |
899 | << m->get_orig_source_addrs() << " " |
900 | << ceph_mds_state_name(m->get_state()); | |
7c673cae FG |
901 | |
902 | if (m->get_state() == MDSMap::STATE_STOPPED) { | |
903 | // send the map manually (they're out of the map, so they won't get it automatic) | |
904 | MDSMap null_map; | |
905 | null_map.epoch = fsmap.epoch; | |
906 | null_map.compat = fsmap.compat; | |
f67539c2 TL |
907 | auto m = make_message<MMDSMap>(mon.monmap->fsid, null_map); |
908 | mon.send_reply(op, m.detach()); | |
7c673cae | 909 | } else { |
f67539c2 | 910 | auto beacon = make_message<MMDSBeacon>(mon.monmap->fsid, |
11fdf7f2 TL |
911 | m->get_global_id(), m->get_name(), fsmap.get_epoch(), |
912 | m->get_state(), m->get_seq(), CEPH_FEATURES_SUPPORTED_DEFAULT); | |
f67539c2 | 913 | mon.send_reply(op, beacon.detach()); |
7c673cae FG |
914 | } |
915 | } | |
916 | ||
917 | void MDSMonitor::on_active() | |
918 | { | |
919 | tick(); | |
7c673cae | 920 | |
28e407b8 | 921 | if (is_leader()) { |
f67539c2 | 922 | mon.clog->debug() << "fsmap " << get_fsmap(); |
224ce89b | 923 | } |
7c673cae FG |
924 | } |
925 | ||
7c673cae FG |
926 | void MDSMonitor::dump_info(Formatter *f) |
927 | { | |
928 | f->open_object_section("fsmap"); | |
28e407b8 | 929 | get_fsmap().dump(f); |
7c673cae FG |
930 | f->close_section(); |
931 | ||
932 | f->dump_unsigned("mdsmap_first_committed", get_first_committed()); | |
933 | f->dump_unsigned("mdsmap_last_committed", get_last_committed()); | |
934 | } | |
935 | ||
936 | bool MDSMonitor::preprocess_command(MonOpRequestRef op) | |
937 | { | |
938 | op->mark_mdsmon_event(__func__); | |
9f95a23c | 939 | auto m = op->get_req<MMonCommand>(); |
7c673cae FG |
940 | int r = -1; |
941 | bufferlist rdata; | |
942 | stringstream ss, ds; | |
943 | ||
11fdf7f2 | 944 | cmdmap_t cmdmap; |
7c673cae FG |
945 | if (!cmdmap_from_json(m->cmd, &cmdmap, ss)) { |
946 | // ss has reason for failure | |
947 | string rs = ss.str(); | |
f67539c2 | 948 | mon.reply_command(op, -EINVAL, rs, rdata, get_last_committed()); |
7c673cae FG |
949 | return true; |
950 | } | |
951 | ||
952 | string prefix; | |
9f95a23c | 953 | cmd_getval(cmdmap, "prefix", prefix); |
7c673cae | 954 | string format; |
9f95a23c | 955 | cmd_getval(cmdmap, "format", format, string("plain")); |
1adf2230 | 956 | std::unique_ptr<Formatter> f(Formatter::create(format)); |
7c673cae | 957 | |
11fdf7f2 | 958 | MonSession *session = op->get_session(); |
7c673cae | 959 | if (!session) { |
f67539c2 | 960 | mon.reply_command(op, -EACCES, "access denied", rdata, get_last_committed()); |
7c673cae FG |
961 | return true; |
962 | } | |
963 | ||
f67539c2 TL |
964 | // to use const qualifier filter fsmap beforehand |
965 | FSMap _fsmap_copy = get_fsmap(); | |
966 | _fsmap_copy.filter(session->get_allowed_fs_names()); | |
967 | const auto& fsmap = _fsmap_copy; | |
968 | ||
7c673cae FG |
969 | if (prefix == "mds stat") { |
970 | if (f) { | |
971 | f->open_object_section("mds_stat"); | |
972 | dump_info(f.get()); | |
973 | f->close_section(); | |
974 | f->flush(ds); | |
975 | } else { | |
976 | ds << fsmap; | |
977 | } | |
978 | r = 0; | |
11fdf7f2 TL |
979 | } else if (prefix == "mds ok-to-stop") { |
980 | vector<string> ids; | |
9f95a23c | 981 | if (!cmd_getval(cmdmap, "ids", ids)) { |
11fdf7f2 TL |
982 | r = -EINVAL; |
983 | ss << "must specify mds id"; | |
984 | goto out; | |
985 | } | |
986 | if (fsmap.is_any_degraded()) { | |
987 | ss << "one or more filesystems is currently degraded"; | |
988 | r = -EBUSY; | |
989 | goto out; | |
990 | } | |
991 | set<mds_gid_t> stopping; | |
992 | for (auto& id : ids) { | |
993 | ostringstream ess; | |
994 | mds_gid_t gid = gid_from_arg(fsmap, id, ess); | |
995 | if (gid == MDS_GID_NONE) { | |
996 | // the mds doesn't exist, but no file systems are unhappy, so losing it | |
997 | // can't have any effect. | |
998 | continue; | |
999 | } | |
1000 | stopping.insert(gid); | |
1001 | } | |
1002 | set<mds_gid_t> active; | |
1003 | set<mds_gid_t> standby; | |
1004 | for (auto gid : stopping) { | |
1005 | if (fsmap.gid_has_rank(gid)) { | |
1006 | // ignore standby-replay daemons (at this level) | |
1007 | if (!fsmap.is_standby_replay(gid)) { | |
1008 | auto standby = fsmap.get_standby_replay(gid); | |
1009 | if (standby == MDS_GID_NONE || | |
1010 | stopping.count(standby)) { | |
1011 | // no standby-replay, or we're also stopping the standby-replay | |
1012 | // for this mds | |
1013 | active.insert(gid); | |
1014 | } | |
1015 | } | |
7c673cae | 1016 | } else { |
11fdf7f2 TL |
1017 | // net loss of a standby |
1018 | standby.insert(gid); | |
7c673cae FG |
1019 | } |
1020 | } | |
11fdf7f2 TL |
1021 | if (fsmap.get_num_standby() - standby.size() < active.size()) { |
1022 | r = -EBUSY; | |
1023 | ss << "insufficent standby MDS daemons to stop active gids " | |
1024 | << stringify(active) | |
1025 | << " and/or standby gids " << stringify(standby);; | |
1026 | goto out; | |
28e407b8 | 1027 | } |
11fdf7f2 TL |
1028 | r = 0; |
1029 | ss << "should be safe to stop " << ids; | |
7c673cae FG |
1030 | } else if (prefix == "fs dump") { |
1031 | int64_t epocharg; | |
1032 | epoch_t epoch; | |
1033 | ||
1adf2230 | 1034 | const FSMap *fsmapp = &fsmap; |
28e407b8 | 1035 | FSMap dummy; |
9f95a23c | 1036 | if (cmd_getval(cmdmap, "epoch", epocharg)) { |
7c673cae FG |
1037 | epoch = epocharg; |
1038 | bufferlist b; | |
1039 | int err = get_version(epoch, b); | |
1040 | if (err == -ENOENT) { | |
7c673cae | 1041 | r = -ENOENT; |
28e407b8 | 1042 | goto out; |
7c673cae | 1043 | } else { |
11fdf7f2 TL |
1044 | ceph_assert(err == 0); |
1045 | ceph_assert(b.length()); | |
28e407b8 AA |
1046 | dummy.decode(b); |
1047 | fsmapp = &dummy; | |
7c673cae FG |
1048 | } |
1049 | } | |
c07f9fc5 | 1050 | |
28e407b8 AA |
1051 | stringstream ds; |
1052 | if (f != NULL) { | |
1053 | f->open_object_section("fsmap"); | |
1054 | fsmapp->dump(f.get()); | |
1055 | f->close_section(); | |
1056 | f->flush(ds); | |
1057 | r = 0; | |
1058 | } else { | |
1059 | fsmapp->print(ds); | |
1060 | r = 0; | |
7c673cae | 1061 | } |
28e407b8 AA |
1062 | |
1063 | rdata.append(ds); | |
1064 | ss << "dumped fsmap epoch " << fsmapp->get_epoch(); | |
7c673cae FG |
1065 | } else if (prefix == "mds metadata") { |
1066 | if (!f) | |
1067 | f.reset(Formatter::create("json-pretty")); | |
1068 | ||
1069 | string who; | |
9f95a23c | 1070 | bool all = !cmd_getval(cmdmap, "who", who); |
7c673cae FG |
1071 | dout(1) << "all = " << all << dendl; |
1072 | if (all) { | |
1073 | r = 0; | |
1074 | // Dump all MDSs' metadata | |
1075 | const auto all_info = fsmap.get_mds_info(); | |
1076 | ||
1077 | f->open_array_section("mds_metadata"); | |
1078 | for(const auto &i : all_info) { | |
1079 | const auto &info = i.second; | |
1080 | ||
1081 | f->open_object_section("mds"); | |
1082 | f->dump_string("name", info.name); | |
1083 | std::ostringstream get_err; | |
1adf2230 | 1084 | r = dump_metadata(fsmap, info.name, f.get(), get_err); |
7c673cae FG |
1085 | if (r == -EINVAL || r == -ENOENT) { |
1086 | // Drop error, list what metadata we do have | |
1087 | dout(1) << get_err.str() << dendl; | |
1088 | r = 0; | |
1089 | } else if (r != 0) { | |
1090 | derr << "Unexpected error reading metadata: " << cpp_strerror(r) | |
1091 | << dendl; | |
1092 | ss << get_err.str(); | |
c07f9fc5 | 1093 | f->close_section(); |
7c673cae FG |
1094 | break; |
1095 | } | |
1096 | f->close_section(); | |
1097 | } | |
1098 | f->close_section(); | |
1099 | } else { | |
1100 | // Dump a single daemon's metadata | |
1101 | f->open_object_section("mds_metadata"); | |
1adf2230 | 1102 | r = dump_metadata(fsmap, who, f.get(), ss); |
7c673cae FG |
1103 | f->close_section(); |
1104 | } | |
1105 | f->flush(ds); | |
31f18b77 FG |
1106 | } else if (prefix == "mds versions") { |
1107 | if (!f) | |
1108 | f.reset(Formatter::create("json-pretty")); | |
1109 | count_metadata("ceph_version", f.get()); | |
1110 | f->flush(ds); | |
1111 | r = 0; | |
1112 | } else if (prefix == "mds count-metadata") { | |
1113 | if (!f) | |
1114 | f.reset(Formatter::create("json-pretty")); | |
1115 | string field; | |
9f95a23c | 1116 | cmd_getval(cmdmap, "property", field); |
31f18b77 FG |
1117 | count_metadata(field, f.get()); |
1118 | f->flush(ds); | |
1119 | r = 0; | |
7c673cae FG |
1120 | } else if (prefix == "mds compat show") { |
1121 | if (f) { | |
1122 | f->open_object_section("mds_compat"); | |
1123 | fsmap.compat.dump(f.get()); | |
1124 | f->close_section(); | |
1125 | f->flush(ds); | |
1126 | } else { | |
1127 | ds << fsmap.compat; | |
1128 | } | |
1129 | r = 0; | |
1130 | } else if (prefix == "fs get") { | |
1131 | string fs_name; | |
9f95a23c | 1132 | cmd_getval(cmdmap, "fs_name", fs_name); |
28e407b8 | 1133 | const auto &fs = fsmap.get_filesystem(fs_name); |
7c673cae FG |
1134 | if (fs == nullptr) { |
1135 | ss << "filesystem '" << fs_name << "' not found"; | |
1136 | r = -ENOENT; | |
1137 | } else { | |
1138 | if (f != nullptr) { | |
1139 | f->open_object_section("filesystem"); | |
1140 | fs->dump(f.get()); | |
1141 | f->close_section(); | |
1142 | f->flush(ds); | |
1143 | r = 0; | |
1144 | } else { | |
1145 | fs->print(ds); | |
1146 | r = 0; | |
1147 | } | |
1148 | } | |
1149 | } else if (prefix == "fs ls") { | |
1150 | if (f) { | |
1151 | f->open_array_section("filesystems"); | |
1adf2230 AA |
1152 | for (const auto &p : fsmap.filesystems) { |
1153 | const auto &fs = p.second; | |
1154 | f->open_object_section("filesystem"); | |
1155 | { | |
1156 | const MDSMap &mds_map = fs->mds_map; | |
1157 | f->dump_string("name", mds_map.fs_name); | |
1158 | /* Output both the names and IDs of pools, for use by | |
1159 | * humans and machines respectively */ | |
f67539c2 | 1160 | f->dump_string("metadata_pool", mon.osdmon()->osdmap.get_pool_name( |
1adf2230 AA |
1161 | mds_map.metadata_pool)); |
1162 | f->dump_int("metadata_pool_id", mds_map.metadata_pool); | |
1163 | f->open_array_section("data_pool_ids"); | |
1164 | for (const auto &id : mds_map.data_pools) { | |
1165 | f->dump_int("data_pool_id", id); | |
1166 | } | |
1167 | f->close_section(); | |
7c673cae | 1168 | |
1adf2230 AA |
1169 | f->open_array_section("data_pools"); |
1170 | for (const auto &id : mds_map.data_pools) { | |
f67539c2 | 1171 | const auto &name = mon.osdmon()->osdmap.get_pool_name(id); |
1adf2230 | 1172 | f->dump_string("data_pool", name); |
7c673cae FG |
1173 | } |
1174 | f->close_section(); | |
1175 | } | |
1adf2230 | 1176 | f->close_section(); |
7c673cae FG |
1177 | } |
1178 | f->close_section(); | |
1179 | f->flush(ds); | |
1180 | } else { | |
28e407b8 AA |
1181 | for (const auto &p : fsmap.filesystems) { |
1182 | const auto &fs = p.second; | |
7c673cae | 1183 | const MDSMap &mds_map = fs->mds_map; |
f67539c2 | 1184 | const string &md_pool_name = mon.osdmon()->osdmap.get_pool_name( |
7c673cae FG |
1185 | mds_map.metadata_pool); |
1186 | ||
1187 | ds << "name: " << mds_map.fs_name << ", metadata pool: " | |
1188 | << md_pool_name << ", data pools: ["; | |
1adf2230 | 1189 | for (const auto &id : mds_map.data_pools) { |
f67539c2 | 1190 | const string &pool_name = mon.osdmon()->osdmap.get_pool_name(id); |
7c673cae FG |
1191 | ds << pool_name << " "; |
1192 | } | |
1193 | ds << "]" << std::endl; | |
1194 | } | |
1195 | ||
1196 | if (fsmap.filesystems.empty()) { | |
1197 | ds << "No filesystems enabled" << std::endl; | |
1198 | } | |
1199 | } | |
1200 | r = 0; | |
f67539c2 TL |
1201 | } else if (prefix == "fs feature ls") { |
1202 | if (f) { | |
1203 | f->open_array_section("cephfs_features"); | |
1204 | for (size_t i = 0; i <= CEPHFS_FEATURE_MAX; ++i) { | |
1205 | f->open_object_section("feature"); | |
1206 | f->dump_int("index", i); | |
1207 | f->dump_string("name", cephfs_feature_name(i)); | |
1208 | f->close_section(); | |
1209 | } | |
1210 | f->close_section(); | |
1211 | f->flush(ds); | |
1212 | } else { | |
1213 | for (size_t i = 0; i <= CEPHFS_FEATURE_MAX; ++i) { | |
1214 | ds << i << " " << cephfs_feature_name(i) << std::endl; | |
1215 | } | |
1216 | } | |
1217 | r = 0; | |
7c673cae FG |
1218 | } |
1219 | ||
28e407b8 | 1220 | out: |
7c673cae FG |
1221 | if (r != -1) { |
1222 | rdata.append(ds); | |
1223 | string rs; | |
1224 | getline(ss, rs); | |
f67539c2 | 1225 | mon.reply_command(op, r, rs, rdata, get_last_committed()); |
7c673cae FG |
1226 | return true; |
1227 | } else | |
1228 | return false; | |
1229 | } | |
1230 | ||
1adf2230 | 1231 | bool MDSMonitor::fail_mds_gid(FSMap &fsmap, mds_gid_t gid) |
7c673cae | 1232 | { |
9f95a23c | 1233 | const auto& info = fsmap.get_info_gid(gid); |
91327a77 | 1234 | dout(1) << "fail_mds_gid " << gid << " mds." << info.name << " role " << info.rank << dendl; |
7c673cae | 1235 | |
f67539c2 | 1236 | ceph_assert(mon.osdmon()->is_writeable()); |
a8e16298 | 1237 | |
f67539c2 | 1238 | epoch_t blocklist_epoch = 0; |
7c673cae FG |
1239 | if (info.rank >= 0 && info.state != MDSMap::STATE_STANDBY_REPLAY) { |
1240 | utime_t until = ceph_clock_now(); | |
f67539c2 TL |
1241 | until += g_conf().get_val<double>("mon_mds_blocklist_interval"); |
1242 | blocklist_epoch = mon.osdmon()->blocklist(info.addrs, until); | |
7c673cae FG |
1243 | } |
1244 | ||
f67539c2 | 1245 | fsmap.erase(gid, blocklist_epoch); |
7c673cae FG |
1246 | last_beacon.erase(gid); |
1247 | if (pending_daemon_health.count(gid)) { | |
1248 | pending_daemon_health.erase(gid); | |
1249 | pending_daemon_health_rm.insert(gid); | |
1250 | } | |
1251 | ||
f67539c2 | 1252 | return blocklist_epoch != 0; |
7c673cae FG |
1253 | } |
1254 | ||
1adf2230 | 1255 | mds_gid_t MDSMonitor::gid_from_arg(const FSMap &fsmap, const std::string &arg, std::ostream &ss) |
7c673cae FG |
1256 | { |
1257 | // Try parsing as a role | |
1258 | mds_role_t role; | |
1259 | std::ostringstream ignore_err; // Don't spam 'ss' with parse_role errors | |
1adf2230 | 1260 | int r = fsmap.parse_role(arg, &role, ignore_err); |
7c673cae FG |
1261 | if (r == 0) { |
1262 | // See if a GID is assigned to this role | |
28e407b8 | 1263 | const auto &fs = fsmap.get_filesystem(role.fscid); |
11fdf7f2 | 1264 | ceph_assert(fs != nullptr); // parse_role ensures it exists |
7c673cae FG |
1265 | if (fs->mds_map.is_up(role.rank)) { |
1266 | dout(10) << __func__ << ": validated rank/GID " << role | |
1267 | << " as a rank" << dendl; | |
1268 | return fs->mds_map.get_mds_info(role.rank).global_id; | |
1269 | } | |
1270 | } | |
1271 | ||
1272 | // Try parsing as a gid | |
1273 | std::string err; | |
1274 | unsigned long long maybe_gid = strict_strtoll(arg.c_str(), 10, &err); | |
1275 | if (!err.empty()) { | |
1276 | // Not a role or a GID, try as a daemon name | |
28e407b8 | 1277 | const MDSMap::mds_info_t *mds_info = fsmap.find_by_name(arg); |
7c673cae FG |
1278 | if (!mds_info) { |
1279 | ss << "MDS named '" << arg | |
1280 | << "' does not exist, or is not up"; | |
1281 | return MDS_GID_NONE; | |
1282 | } | |
1283 | dout(10) << __func__ << ": resolved MDS name '" << arg | |
1284 | << "' to GID " << mds_info->global_id << dendl; | |
1285 | return mds_info->global_id; | |
1286 | } else { | |
1287 | // Not a role, but parses as a an integer, might be a GID | |
1288 | dout(10) << __func__ << ": treating MDS reference '" << arg | |
1289 | << "' as an integer " << maybe_gid << dendl; | |
31f18b77 | 1290 | |
28e407b8 | 1291 | if (fsmap.gid_exists(mds_gid_t(maybe_gid))) { |
31f18b77 | 1292 | return mds_gid_t(maybe_gid); |
7c673cae FG |
1293 | } |
1294 | } | |
1295 | ||
1296 | dout(1) << __func__ << ": rank/GID " << arg | |
1297 | << " not a existent rank or GID" << dendl; | |
1298 | return MDS_GID_NONE; | |
1299 | } | |
1300 | ||
1adf2230 AA |
1301 | int MDSMonitor::fail_mds(FSMap &fsmap, std::ostream &ss, |
1302 | const std::string &arg, MDSMap::mds_info_t *failed_info) | |
7c673cae | 1303 | { |
11fdf7f2 | 1304 | ceph_assert(failed_info != nullptr); |
d2e6a577 | 1305 | |
1adf2230 | 1306 | mds_gid_t gid = gid_from_arg(fsmap, arg, ss); |
7c673cae FG |
1307 | if (gid == MDS_GID_NONE) { |
1308 | return 0; | |
1309 | } | |
f67539c2 | 1310 | if (!mon.osdmon()->is_writeable()) { |
7c673cae FG |
1311 | return -EAGAIN; |
1312 | } | |
d2e6a577 FG |
1313 | |
1314 | // Take a copy of the info before removing the MDS from the map, | |
1315 | // so that the caller knows which mds (if any) they ended up removing. | |
1adf2230 | 1316 | *failed_info = fsmap.get_info_gid(gid); |
d2e6a577 | 1317 | |
1adf2230 | 1318 | fail_mds_gid(fsmap, gid); |
7c673cae | 1319 | ss << "failed mds gid " << gid; |
f67539c2 TL |
1320 | ceph_assert(mon.osdmon()->is_writeable()); |
1321 | request_proposal(mon.osdmon()); | |
7c673cae FG |
1322 | return 0; |
1323 | } | |
1324 | ||
1325 | bool MDSMonitor::prepare_command(MonOpRequestRef op) | |
1326 | { | |
1327 | op->mark_mdsmon_event(__func__); | |
9f95a23c | 1328 | auto m = op->get_req<MMonCommand>(); |
7c673cae FG |
1329 | int r = -EINVAL; |
1330 | stringstream ss; | |
1331 | bufferlist rdata; | |
1332 | ||
11fdf7f2 | 1333 | cmdmap_t cmdmap; |
7c673cae FG |
1334 | if (!cmdmap_from_json(m->cmd, &cmdmap, ss)) { |
1335 | string rs = ss.str(); | |
f67539c2 | 1336 | mon.reply_command(op, -EINVAL, rs, rdata, get_last_committed()); |
7c673cae FG |
1337 | return true; |
1338 | } | |
1339 | ||
1340 | string prefix; | |
9f95a23c | 1341 | cmd_getval(cmdmap, "prefix", prefix); |
7c673cae FG |
1342 | |
1343 | /* Refuse access if message not associated with a valid session */ | |
11fdf7f2 | 1344 | MonSession *session = op->get_session(); |
7c673cae | 1345 | if (!session) { |
f67539c2 | 1346 | mon.reply_command(op, -EACCES, "access denied", rdata, get_last_committed()); |
7c673cae FG |
1347 | return true; |
1348 | } | |
1349 | ||
28e407b8 AA |
1350 | auto &pending = get_pending_fsmap_writeable(); |
1351 | ||
c07f9fc5 | 1352 | bool batched_propose = false; |
28e407b8 | 1353 | for (const auto &h : handlers) { |
f67539c2 TL |
1354 | r = h->can_handle(prefix, op, pending, cmdmap, ss); |
1355 | if (r == 1) { | |
1356 | ; // pass, since we got the right handler. | |
1357 | } else if (r == 0) { | |
1358 | continue; | |
1359 | } else { | |
1360 | goto out; | |
1361 | } | |
c07f9fc5 | 1362 | |
f67539c2 TL |
1363 | batched_propose = h->batched_propose(); |
1364 | if (batched_propose) { | |
1365 | paxos.plug(); | |
1366 | } | |
1367 | r = h->handle(&mon, pending, op, cmdmap, ss); | |
1368 | if (batched_propose) { | |
1369 | paxos.unplug(); | |
1370 | } | |
1371 | ||
1372 | if (r == -EAGAIN) { | |
1373 | // message has been enqueued for retry; return. | |
1374 | dout(4) << __func__ << " enqueue for retry by prepare_command" << dendl; | |
1375 | return false; | |
1376 | } else { | |
1377 | if (r == 0) { | |
1378 | // On successful updates, print the updated map | |
1379 | print_map(pending); | |
7c673cae | 1380 | } |
f67539c2 TL |
1381 | // Successful or not, we're done: respond. |
1382 | goto out; | |
7c673cae FG |
1383 | } |
1384 | } | |
1385 | ||
1adf2230 | 1386 | r = filesystem_command(pending, op, prefix, cmdmap, ss); |
7c673cae FG |
1387 | if (r >= 0) { |
1388 | goto out; | |
1389 | } else if (r == -EAGAIN) { | |
1390 | // Do not reply, the message has been enqueued for retry | |
1391 | dout(4) << __func__ << " enqueue for retry by filesystem_command" << dendl; | |
1392 | return false; | |
1393 | } else if (r != -ENOSYS) { | |
1394 | goto out; | |
1395 | } | |
1396 | ||
7c673cae FG |
1397 | if (r == -ENOSYS && ss.str().empty()) { |
1398 | ss << "unrecognized command"; | |
1399 | } | |
1400 | ||
1401 | out: | |
1402 | dout(4) << __func__ << " done, r=" << r << dendl; | |
1403 | /* Compose response */ | |
1404 | string rs; | |
1405 | getline(ss, rs); | |
1406 | ||
1407 | if (r >= 0) { | |
1408 | // success.. delay reply | |
1409 | wait_for_finished_proposal(op, new Monitor::C_Command(mon, op, r, rs, | |
1410 | get_last_committed() + 1)); | |
c07f9fc5 FG |
1411 | if (batched_propose) { |
1412 | force_immediate_propose(); | |
1413 | } | |
7c673cae FG |
1414 | return true; |
1415 | } else { | |
1416 | // reply immediately | |
f67539c2 | 1417 | mon.reply_command(op, r, rs, rdata, get_last_committed()); |
7c673cae FG |
1418 | return false; |
1419 | } | |
1420 | } | |
1421 | ||
7c673cae | 1422 | int MDSMonitor::filesystem_command( |
1adf2230 | 1423 | FSMap &fsmap, |
7c673cae FG |
1424 | MonOpRequestRef op, |
1425 | std::string const &prefix, | |
11fdf7f2 | 1426 | const cmdmap_t& cmdmap, |
7c673cae FG |
1427 | std::stringstream &ss) |
1428 | { | |
1429 | dout(4) << __func__ << " prefix='" << prefix << "'" << dendl; | |
1430 | op->mark_mdsmon_event(__func__); | |
1431 | int r = 0; | |
1432 | string whostr; | |
9f95a23c | 1433 | cmd_getval(cmdmap, "role", whostr); |
7c673cae | 1434 | |
11fdf7f2 | 1435 | if (prefix == "mds set_state") { |
7c673cae | 1436 | mds_gid_t gid; |
9f95a23c | 1437 | if (!cmd_getval(cmdmap, "gid", gid)) { |
7c673cae | 1438 | ss << "error parsing 'gid' value '" |
11fdf7f2 | 1439 | << cmd_vartype_stringify(cmdmap.at("gid")) << "'"; |
7c673cae FG |
1440 | return -EINVAL; |
1441 | } | |
1442 | MDSMap::DaemonState state; | |
9f95a23c | 1443 | if (!cmd_getval(cmdmap, "state", state)) { |
7c673cae | 1444 | ss << "error parsing 'state' string value '" |
11fdf7f2 | 1445 | << cmd_vartype_stringify(cmdmap.at("state")) << "'"; |
7c673cae FG |
1446 | return -EINVAL; |
1447 | } | |
f67539c2 | 1448 | if (fsmap.gid_exists(gid, op->get_session()->get_allowed_fs_names())) { |
11fdf7f2 TL |
1449 | fsmap.modify_daemon(gid, [state](auto& info) { |
1450 | info.state = state; | |
7c673cae FG |
1451 | }); |
1452 | ss << "set mds gid " << gid << " to state " << state << " " | |
1453 | << ceph_mds_state_name(state); | |
1454 | return 0; | |
1455 | } | |
1456 | } else if (prefix == "mds fail") { | |
1457 | string who; | |
9f95a23c | 1458 | cmd_getval(cmdmap, "role_or_gid", who); |
d2e6a577 FG |
1459 | |
1460 | MDSMap::mds_info_t failed_info; | |
f67539c2 TL |
1461 | mds_gid_t gid = gid_from_arg(fsmap, who, ss); |
1462 | if (gid == MDS_GID_NONE) { | |
1463 | ss << "MDS named '" << who << "' does not exist, is not up or you " | |
1464 | << "lack the permission to see."; | |
1465 | return 0; | |
1466 | } | |
1467 | if(!fsmap.gid_exists(gid, op->get_session()->get_allowed_fs_names())) { | |
1468 | ss << "MDS named '" << who << "' does not exist, is not up or you " | |
1469 | << "lack the permission to see."; | |
1470 | return -EINVAL; | |
1471 | } | |
1472 | string_view fs_name = fsmap.fs_name_from_gid(gid); | |
1473 | if (!op->get_session()->fs_name_capable(fs_name, MON_CAP_W)) { | |
1474 | ss << "Permission denied."; | |
1475 | return -EPERM; | |
1476 | } | |
1477 | ||
1adf2230 | 1478 | r = fail_mds(fsmap, ss, who, &failed_info); |
7c673cae | 1479 | if (r < 0 && r == -EAGAIN) { |
f67539c2 | 1480 | mon.osdmon()->wait_for_writeable(op, new C_RetryMessage(this, op)); |
7c673cae | 1481 | return -EAGAIN; // don't propose yet; wait for message to be retried |
d2e6a577 FG |
1482 | } else if (r == 0) { |
1483 | // Only log if we really did something (not when was already gone) | |
1484 | if (failed_info.global_id != MDS_GID_NONE) { | |
f67539c2 | 1485 | mon.clog->info() << failed_info.human_name() << " marked failed by " |
d2e6a577 FG |
1486 | << op->get_session()->entity_name; |
1487 | } | |
7c673cae FG |
1488 | } |
1489 | } else if (prefix == "mds rm") { | |
1490 | mds_gid_t gid; | |
9f95a23c | 1491 | if (!cmd_getval(cmdmap, "gid", gid)) { |
7c673cae | 1492 | ss << "error parsing 'gid' value '" |
11fdf7f2 | 1493 | << cmd_vartype_stringify(cmdmap.at("gid")) << "'"; |
7c673cae FG |
1494 | return -EINVAL; |
1495 | } | |
f67539c2 | 1496 | if (!fsmap.gid_exists(gid, op->get_session()->get_allowed_fs_names())) { |
11fdf7f2 | 1497 | ss << "mds gid " << gid << " does not exist"; |
f67539c2 TL |
1498 | return 0; |
1499 | } | |
1500 | string_view fs_name = fsmap.fs_name_from_gid(gid); | |
1501 | if (!op->get_session()->fs_name_capable(fs_name, MON_CAP_W)) { | |
1502 | ss << "Permission denied."; | |
1503 | return -EPERM; | |
1504 | } | |
1505 | const auto &info = fsmap.get_info_gid(gid); | |
1506 | MDSMap::DaemonState state = info.state; | |
1507 | if (state > 0) { | |
1508 | ss << "cannot remove active mds." << info.name | |
1509 | << " rank " << info.rank; | |
1510 | return -EBUSY; | |
7c673cae | 1511 | } else { |
f67539c2 TL |
1512 | fsmap.erase(gid, {}); |
1513 | ss << "removed mds gid " << gid; | |
1514 | return 0; | |
7c673cae FG |
1515 | } |
1516 | } else if (prefix == "mds rmfailed") { | |
11fdf7f2 | 1517 | bool confirm = false; |
9f95a23c | 1518 | cmd_getval(cmdmap, "yes_i_really_mean_it", confirm); |
11fdf7f2 | 1519 | if (!confirm) { |
7c673cae FG |
1520 | ss << "WARNING: this can make your filesystem inaccessible! " |
1521 | "Add --yes-i-really-mean-it if you are sure you wish to continue."; | |
1522 | return -EPERM; | |
1523 | } | |
1524 | ||
1525 | std::string role_str; | |
9f95a23c | 1526 | cmd_getval(cmdmap, "role", role_str); |
7c673cae | 1527 | mds_role_t role; |
f67539c2 TL |
1528 | const auto fs_names = op->get_session()->get_allowed_fs_names(); |
1529 | int r = fsmap.parse_role(role_str, &role, ss, fs_names); | |
7c673cae FG |
1530 | if (r < 0) { |
1531 | ss << "invalid role '" << role_str << "'"; | |
1532 | return -EINVAL; | |
1533 | } | |
f67539c2 TL |
1534 | string_view fs_name = fsmap.get_filesystem(role.fscid)->mds_map.get_fs_name(); |
1535 | if (!op->get_session()->fs_name_capable(fs_name, MON_CAP_W)) { | |
1536 | ss << "Permission denied."; | |
1537 | return -EPERM; | |
1538 | } | |
7c673cae | 1539 | |
1adf2230 | 1540 | fsmap.modify_filesystem( |
7c673cae FG |
1541 | role.fscid, |
1542 | [role](std::shared_ptr<Filesystem> fs) | |
1543 | { | |
1544 | fs->mds_map.failed.erase(role.rank); | |
1545 | }); | |
1546 | ||
1547 | ss << "removed failed mds." << role; | |
1548 | return 0; | |
1549 | } else if (prefix == "mds compat rm_compat") { | |
1550 | int64_t f; | |
9f95a23c | 1551 | if (!cmd_getval(cmdmap, "feature", f)) { |
7c673cae | 1552 | ss << "error parsing feature value '" |
11fdf7f2 | 1553 | << cmd_vartype_stringify(cmdmap.at("feature")) << "'"; |
7c673cae FG |
1554 | return -EINVAL; |
1555 | } | |
1adf2230 | 1556 | if (fsmap.compat.compat.contains(f)) { |
7c673cae | 1557 | ss << "removing compat feature " << f; |
1adf2230 | 1558 | CompatSet modified = fsmap.compat; |
7c673cae | 1559 | modified.compat.remove(f); |
1adf2230 | 1560 | fsmap.update_compat(modified); |
7c673cae | 1561 | } else { |
1adf2230 | 1562 | ss << "compat feature " << f << " not present in " << fsmap.compat; |
7c673cae FG |
1563 | } |
1564 | r = 0; | |
1565 | } else if (prefix == "mds compat rm_incompat") { | |
1566 | int64_t f; | |
9f95a23c | 1567 | if (!cmd_getval(cmdmap, "feature", f)) { |
7c673cae | 1568 | ss << "error parsing feature value '" |
11fdf7f2 | 1569 | << cmd_vartype_stringify(cmdmap.at("feature")) << "'"; |
7c673cae FG |
1570 | return -EINVAL; |
1571 | } | |
1adf2230 | 1572 | if (fsmap.compat.incompat.contains(f)) { |
7c673cae | 1573 | ss << "removing incompat feature " << f; |
1adf2230 | 1574 | CompatSet modified = fsmap.compat; |
7c673cae | 1575 | modified.incompat.remove(f); |
1adf2230 | 1576 | fsmap.update_compat(modified); |
7c673cae | 1577 | } else { |
1adf2230 | 1578 | ss << "incompat feature " << f << " not present in " << fsmap.compat; |
7c673cae FG |
1579 | } |
1580 | r = 0; | |
1581 | } else if (prefix == "mds repaired") { | |
1582 | std::string role_str; | |
9f95a23c | 1583 | cmd_getval(cmdmap, "role", role_str); |
7c673cae | 1584 | mds_role_t role; |
f67539c2 TL |
1585 | const auto fs_names = op->get_session()->get_allowed_fs_names(); |
1586 | r = fsmap.parse_role(role_str, &role, ss, fs_names); | |
7c673cae FG |
1587 | if (r < 0) { |
1588 | return r; | |
1589 | } | |
f67539c2 TL |
1590 | string_view fs_name = fsmap.get_filesystem(role.fscid)->mds_map.get_fs_name(); |
1591 | if (!op->get_session()->fs_name_capable(fs_name, MON_CAP_W)) { | |
1592 | ss << "Permission denied."; | |
1593 | return -EPERM; | |
1594 | } | |
7c673cae | 1595 | |
1adf2230 | 1596 | bool modified = fsmap.undamaged(role.fscid, role.rank); |
7c673cae | 1597 | if (modified) { |
494da23a | 1598 | ss << "repaired: restoring rank " << role; |
7c673cae | 1599 | } else { |
494da23a | 1600 | ss << "nothing to do: rank is not damaged"; |
7c673cae FG |
1601 | } |
1602 | ||
1603 | r = 0; | |
11fdf7f2 TL |
1604 | } else if (prefix == "mds freeze") { |
1605 | std::string who; | |
9f95a23c | 1606 | cmd_getval(cmdmap, "role_or_gid", who); |
11fdf7f2 TL |
1607 | mds_gid_t gid = gid_from_arg(fsmap, who, ss); |
1608 | if (gid == MDS_GID_NONE) { | |
7c673cae FG |
1609 | return -EINVAL; |
1610 | } | |
1611 | ||
f67539c2 TL |
1612 | string_view fs_name = fsmap.fs_name_from_gid(gid); |
1613 | if (!op->get_session()->fs_name_capable(fs_name, MON_CAP_W)) { | |
1614 | ss << "Permission denied."; | |
1615 | return -EPERM; | |
1616 | } | |
1617 | ||
11fdf7f2 | 1618 | bool freeze = false; |
7c673cae | 1619 | { |
11fdf7f2 | 1620 | std::string str; |
9f95a23c | 1621 | cmd_getval(cmdmap, "val", str); |
11fdf7f2 TL |
1622 | if ((r = parse_bool(str, &freeze, ss)) != 0) { |
1623 | return r; | |
1624 | } | |
1625 | } | |
7c673cae | 1626 | |
11fdf7f2 TL |
1627 | auto f = [freeze,gid,&ss](auto& info) { |
1628 | if (freeze) { | |
1629 | ss << "freezing mds." << gid; | |
1630 | info.freeze(); | |
1631 | } else { | |
1632 | ss << "unfreezing mds." << gid; | |
1633 | info.unfreeze(); | |
1634 | } | |
1635 | }; | |
1636 | fsmap.modify_daemon(gid, f); | |
7c673cae FG |
1637 | r = 0; |
1638 | } else { | |
1639 | return -ENOSYS; | |
1640 | } | |
1641 | ||
1642 | return r; | |
1643 | } | |
1644 | ||
7c673cae FG |
1645 | void MDSMonitor::check_subs() |
1646 | { | |
7c673cae FG |
1647 | // Subscriptions may be to "mdsmap" (MDS and legacy clients), |
1648 | // "mdsmap.<namespace>", or to "fsmap" for the full state of all | |
1649 | // filesystems. Build a list of all the types we service | |
1650 | // subscriptions for. | |
9f95a23c TL |
1651 | |
1652 | std::vector<std::string> types = { | |
1653 | "fsmap", | |
1654 | "fsmap.user", | |
1655 | "mdsmap", | |
1656 | }; | |
1657 | ||
28e407b8 AA |
1658 | for (const auto &p : get_fsmap().filesystems) { |
1659 | const auto &fscid = p.first; | |
9f95a23c TL |
1660 | CachedStackStringStream cos; |
1661 | *cos << "mdsmap." << fscid; | |
1662 | types.push_back(std::string(cos->strv())); | |
7c673cae FG |
1663 | } |
1664 | ||
1665 | for (const auto &type : types) { | |
f67539c2 | 1666 | auto& subs = mon.session_map.subs; |
9f95a23c TL |
1667 | auto subs_it = subs.find(type); |
1668 | if (subs_it == subs.end()) | |
7c673cae | 1669 | continue; |
9f95a23c TL |
1670 | auto sub_it = subs_it->second->begin(); |
1671 | while (!sub_it.end()) { | |
1672 | auto sub = *sub_it; | |
1673 | ++sub_it; // N.B. check_sub may remove sub! | |
7c673cae FG |
1674 | check_sub(sub); |
1675 | } | |
1676 | } | |
1677 | } | |
1678 | ||
1679 | ||
1680 | void MDSMonitor::check_sub(Subscription *sub) | |
1681 | { | |
1682 | dout(20) << __func__ << ": " << sub->type << dendl; | |
1683 | ||
f67539c2 TL |
1684 | // to use const qualifier filter fsmap beforehand |
1685 | FSMap _fsmap_copy = get_fsmap(); | |
1686 | _fsmap_copy.filter(sub->session->get_allowed_fs_names()); | |
1687 | const auto& fsmap = _fsmap_copy; | |
1688 | if (sub->next > fsmap.get_epoch()) { | |
1689 | return; | |
1690 | } | |
28e407b8 | 1691 | |
7c673cae | 1692 | if (sub->type == "fsmap") { |
f67539c2 TL |
1693 | sub->session->con->send_message(new MFSMap(mon.monmap->fsid, fsmap)); |
1694 | if (sub->onetime) { | |
1695 | mon.session_map.remove_sub(sub); | |
1696 | } else { | |
1697 | sub->next = fsmap.get_epoch() + 1; | |
7c673cae FG |
1698 | } |
1699 | } else if (sub->type == "fsmap.user") { | |
f67539c2 TL |
1700 | FSMapUser fsmap_u; |
1701 | fsmap_u.epoch = fsmap.get_epoch(); | |
1702 | fsmap_u.legacy_client_fscid = fsmap.legacy_client_fscid; | |
1703 | for (const auto &p : fsmap.filesystems) { | |
1704 | FSMapUser::fs_info_t& fs_info = fsmap_u.filesystems[p.second->fscid]; | |
1705 | fs_info.cid = p.second->fscid; | |
1706 | fs_info.name = p.second->mds_map.fs_name; | |
1707 | } | |
1708 | sub->session->con->send_message(new MFSMapUser(mon.monmap->fsid, fsmap_u)); | |
1709 | if (sub->onetime) { | |
1710 | mon.session_map.remove_sub(sub); | |
1711 | } else { | |
1712 | sub->next = fsmap.get_epoch() + 1; | |
7c673cae FG |
1713 | } |
1714 | } else if (sub->type.compare(0, 6, "mdsmap") == 0) { | |
11fdf7f2 | 1715 | const bool is_mds = sub->session->name.is_mds(); |
7c673cae FG |
1716 | mds_gid_t mds_gid = MDS_GID_NONE; |
1717 | fs_cluster_id_t fscid = FS_CLUSTER_ID_NONE; | |
1718 | if (is_mds) { | |
1719 | // What (if any) namespace are you assigned to? | |
1720 | auto mds_info = fsmap.get_mds_info(); | |
1adf2230 | 1721 | for (const auto &p : mds_info) { |
11fdf7f2 | 1722 | if (p.second.addrs == sub->session->addrs) { |
1adf2230 | 1723 | mds_gid = p.first; |
7c673cae FG |
1724 | fscid = fsmap.mds_roles.at(mds_gid); |
1725 | } | |
1726 | } | |
1727 | } else { | |
1728 | // You're a client. Did you request a particular | |
1729 | // namespace? | |
11fdf7f2 | 1730 | if (sub->type.compare(0, 7, "mdsmap.") == 0) { |
7c673cae FG |
1731 | auto namespace_id_str = sub->type.substr(std::string("mdsmap.").size()); |
1732 | dout(10) << __func__ << ": namespace_id " << namespace_id_str << dendl; | |
1733 | std::string err; | |
1734 | fscid = strict_strtoll(namespace_id_str.c_str(), 10, &err); | |
1735 | if (!err.empty()) { | |
1736 | // Client asked for a non-existent namespace, send them nothing | |
1737 | dout(1) << "Invalid client subscription '" << sub->type | |
1738 | << "'" << dendl; | |
1739 | return; | |
1740 | } | |
7c673cae FG |
1741 | } else { |
1742 | // Unqualified request for "mdsmap": give it the one marked | |
1743 | // for use by legacy clients. | |
1744 | if (fsmap.legacy_client_fscid != FS_CLUSTER_ID_NONE) { | |
1745 | fscid = fsmap.legacy_client_fscid; | |
1746 | } else { | |
1747 | dout(1) << "Client subscribed for legacy filesystem but " | |
1748 | "none is configured" << dendl; | |
1749 | return; | |
1750 | } | |
1751 | } | |
b3b6e05e TL |
1752 | if (!fsmap.filesystem_exists(fscid)) { |
1753 | // Client asked for a non-existent namespace, send them nothing | |
1754 | // TODO: something more graceful for when a client has a filesystem | |
1755 | // mounted, and the fileysstem is deleted. Add a "shut down you fool" | |
1756 | // flag to MMDSMap? | |
1757 | dout(1) << "Client subscribed to non-existent namespace '" << | |
1758 | fscid << "'" << dendl; | |
1759 | return; | |
1760 | } | |
7c673cae FG |
1761 | } |
1762 | dout(10) << __func__ << ": is_mds=" << is_mds << ", fscid= " << fscid << dendl; | |
1763 | ||
1764 | // Work out the effective latest epoch | |
28e407b8 | 1765 | const MDSMap *mds_map = nullptr; |
7c673cae FG |
1766 | MDSMap null_map; |
1767 | null_map.compat = fsmap.compat; | |
1768 | if (fscid == FS_CLUSTER_ID_NONE) { | |
1769 | // For a client, we should have already dropped out | |
11fdf7f2 | 1770 | ceph_assert(is_mds); |
7c673cae | 1771 | |
28e407b8 AA |
1772 | auto it = fsmap.standby_daemons.find(mds_gid); |
1773 | if (it != fsmap.standby_daemons.end()) { | |
7c673cae | 1774 | // For an MDS, we need to feed it an MDSMap with its own state in |
28e407b8 AA |
1775 | null_map.mds_info[mds_gid] = it->second; |
1776 | null_map.epoch = fsmap.standby_epochs.at(mds_gid); | |
7c673cae FG |
1777 | } else { |
1778 | null_map.epoch = fsmap.epoch; | |
1779 | } | |
1780 | mds_map = &null_map; | |
1781 | } else { | |
1782 | // Check the effective epoch | |
28e407b8 | 1783 | mds_map = &fsmap.get_filesystem(fscid)->mds_map; |
7c673cae FG |
1784 | } |
1785 | ||
11fdf7f2 | 1786 | ceph_assert(mds_map != nullptr); |
7c673cae FG |
1787 | dout(10) << __func__ << " selected MDS map epoch " << |
1788 | mds_map->epoch << " for namespace " << fscid << " for subscriber " | |
11fdf7f2 | 1789 | << sub->session->name << " who wants epoch " << sub->next << dendl; |
7c673cae FG |
1790 | |
1791 | if (sub->next > mds_map->epoch) { | |
1792 | return; | |
1793 | } | |
f67539c2 TL |
1794 | auto msg = make_message<MMDSMap>(mon.monmap->fsid, *mds_map, |
1795 | mds_map->fs_name); | |
7c673cae | 1796 | |
11fdf7f2 | 1797 | sub->session->con->send_message(msg.detach()); |
7c673cae | 1798 | if (sub->onetime) { |
f67539c2 | 1799 | mon.session_map.remove_sub(sub); |
7c673cae FG |
1800 | } else { |
1801 | sub->next = mds_map->get_epoch() + 1; | |
1802 | } | |
1803 | } | |
1804 | } | |
1805 | ||
1806 | ||
1807 | void MDSMonitor::update_metadata(mds_gid_t gid, | |
1808 | const map<string, string>& metadata) | |
1809 | { | |
1810 | if (metadata.empty()) { | |
1811 | return; | |
1812 | } | |
1813 | pending_metadata[gid] = metadata; | |
1814 | ||
f67539c2 | 1815 | MonitorDBStore::TransactionRef t = paxos.get_pending_transaction(); |
7c673cae | 1816 | bufferlist bl; |
11fdf7f2 | 1817 | encode(pending_metadata, bl); |
7c673cae | 1818 | t->put(MDS_METADATA_PREFIX, "last_metadata", bl); |
f67539c2 | 1819 | paxos.trigger_propose(); |
7c673cae FG |
1820 | } |
1821 | ||
1adf2230 | 1822 | void MDSMonitor::remove_from_metadata(const FSMap &fsmap, MonitorDBStore::TransactionRef t) |
7c673cae FG |
1823 | { |
1824 | bool update = false; | |
1adf2230 AA |
1825 | for (auto it = pending_metadata.begin(); it != pending_metadata.end(); ) { |
1826 | if (!fsmap.gid_exists(it->first)) { | |
1827 | it = pending_metadata.erase(it); | |
7c673cae FG |
1828 | update = true; |
1829 | } else { | |
1adf2230 | 1830 | ++it; |
7c673cae FG |
1831 | } |
1832 | } | |
1833 | if (!update) | |
1834 | return; | |
1835 | bufferlist bl; | |
11fdf7f2 | 1836 | encode(pending_metadata, bl); |
7c673cae FG |
1837 | t->put(MDS_METADATA_PREFIX, "last_metadata", bl); |
1838 | } | |
1839 | ||
1840 | int MDSMonitor::load_metadata(map<mds_gid_t, Metadata>& m) | |
1841 | { | |
1842 | bufferlist bl; | |
f67539c2 | 1843 | int r = mon.store->get(MDS_METADATA_PREFIX, "last_metadata", bl); |
7c673cae | 1844 | if (r) { |
11fdf7f2 | 1845 | dout(5) << "Unable to load 'last_metadata'" << dendl; |
7c673cae FG |
1846 | return r; |
1847 | } | |
1848 | ||
11fdf7f2 TL |
1849 | auto it = bl.cbegin(); |
1850 | ceph::decode(m, it); | |
7c673cae FG |
1851 | return 0; |
1852 | } | |
1853 | ||
1adf2230 | 1854 | void MDSMonitor::count_metadata(const std::string &field, map<string,int> *out) |
31f18b77 | 1855 | { |
31f18b77 FG |
1856 | map<mds_gid_t,Metadata> meta; |
1857 | load_metadata(meta); | |
1858 | for (auto& p : meta) { | |
1859 | auto q = p.second.find(field); | |
1860 | if (q == p.second.end()) { | |
c07f9fc5 | 1861 | (*out)["unknown"]++; |
31f18b77 | 1862 | } else { |
c07f9fc5 | 1863 | (*out)[q->second]++; |
31f18b77 FG |
1864 | } |
1865 | } | |
c07f9fc5 FG |
1866 | } |
1867 | ||
1adf2230 | 1868 | void MDSMonitor::count_metadata(const std::string &field, Formatter *f) |
c07f9fc5 FG |
1869 | { |
1870 | map<string,int> by_val; | |
1871 | count_metadata(field, &by_val); | |
31f18b77 FG |
1872 | f->open_object_section(field.c_str()); |
1873 | for (auto& p : by_val) { | |
1874 | f->dump_int(p.first.c_str(), p.second); | |
1875 | } | |
1876 | f->close_section(); | |
1877 | } | |
1878 | ||
f67539c2 TL |
1879 | void MDSMonitor::get_versions(std::map<string, list<string> > &versions) |
1880 | { | |
1881 | map<mds_gid_t,Metadata> meta; | |
1882 | load_metadata(meta); | |
1883 | const auto &fsmap = get_fsmap(); | |
1884 | std::map<mds_gid_t, mds_info_t> map = fsmap.get_mds_info(); | |
1885 | dout(10) << __func__ << " mds meta=" << meta << dendl; | |
1886 | for (auto& p : meta) { | |
1887 | auto q = p.second.find("ceph_version_short"); | |
1888 | if (q == p.second.end()) continue; | |
1889 | versions[q->second].push_back(string("mds.") + map[p.first].name); | |
1890 | } | |
1891 | } | |
1892 | ||
1adf2230 AA |
1893 | int MDSMonitor::dump_metadata(const FSMap& fsmap, const std::string &who, |
1894 | Formatter *f, ostream& err) | |
7c673cae | 1895 | { |
11fdf7f2 | 1896 | ceph_assert(f); |
7c673cae | 1897 | |
1adf2230 | 1898 | mds_gid_t gid = gid_from_arg(fsmap, who, err); |
7c673cae FG |
1899 | if (gid == MDS_GID_NONE) { |
1900 | return -EINVAL; | |
1901 | } | |
1902 | ||
1903 | map<mds_gid_t, Metadata> metadata; | |
1904 | if (int r = load_metadata(metadata)) { | |
1905 | err << "Unable to load 'last_metadata'"; | |
1906 | return r; | |
1907 | } | |
1908 | ||
1909 | if (!metadata.count(gid)) { | |
1910 | return -ENOENT; | |
1911 | } | |
1912 | const Metadata& m = metadata[gid]; | |
1913 | for (Metadata::const_iterator p = m.begin(); p != m.end(); ++p) { | |
1914 | f->dump_string(p->first.c_str(), p->second); | |
1915 | } | |
1916 | return 0; | |
1917 | } | |
1918 | ||
1919 | int MDSMonitor::print_nodes(Formatter *f) | |
1920 | { | |
11fdf7f2 | 1921 | ceph_assert(f); |
7c673cae | 1922 | |
1adf2230 AA |
1923 | const auto &fsmap = get_fsmap(); |
1924 | ||
7c673cae FG |
1925 | map<mds_gid_t, Metadata> metadata; |
1926 | if (int r = load_metadata(metadata)) { | |
1927 | return r; | |
1928 | } | |
1929 | ||
11fdf7f2 | 1930 | map<string, list<string> > mdses; // hostname => mds |
1adf2230 AA |
1931 | for (const auto &p : metadata) { |
1932 | const mds_gid_t& gid = p.first; | |
1933 | const Metadata& m = p.second; | |
7c673cae FG |
1934 | Metadata::const_iterator hostname = m.find("hostname"); |
1935 | if (hostname == m.end()) { | |
1936 | // not likely though | |
1937 | continue; | |
1938 | } | |
1adf2230 | 1939 | if (!fsmap.gid_exists(gid)) { |
7c673cae FG |
1940 | dout(5) << __func__ << ": GID " << gid << " not existent" << dendl; |
1941 | continue; | |
1942 | } | |
1adf2230 | 1943 | const MDSMap::mds_info_t& mds_info = fsmap.get_info_gid(gid); |
11fdf7f2 | 1944 | mdses[hostname->second].push_back(mds_info.name); |
7c673cae FG |
1945 | } |
1946 | ||
1947 | dump_services(f, mdses, "mds"); | |
1948 | return 0; | |
1949 | } | |
1950 | ||
1951 | /** | |
1952 | * If a cluster is undersized (with respect to max_mds), then | |
11fdf7f2 TL |
1953 | * attempt to find daemons to grow it. If the cluster is oversized |
1954 | * (with respect to max_mds) then shrink it by stopping its highest rank. | |
7c673cae | 1955 | */ |
11fdf7f2 | 1956 | bool MDSMonitor::maybe_resize_cluster(FSMap &fsmap, fs_cluster_id_t fscid) |
7c673cae | 1957 | { |
11fdf7f2 TL |
1958 | auto ¤t_mds_map = get_fsmap().get_filesystem(fscid)->mds_map; |
1959 | auto&& fs = fsmap.get_filesystem(fscid); | |
1adf2230 | 1960 | auto &mds_map = fs->mds_map; |
7c673cae | 1961 | |
1adf2230 AA |
1962 | int in = mds_map.get_num_in_mds(); |
1963 | int max = mds_map.get_max_mds(); | |
1964 | ||
1965 | dout(20) << __func__ << " in " << in << " max " << max << dendl; | |
1966 | ||
11fdf7f2 TL |
1967 | /* Check that both the current epoch mds_map is resizeable as well as the |
1968 | * current batch of changes in pending. This is important if an MDS is | |
1969 | * becoming active in the next epoch. | |
1970 | */ | |
1971 | if (!current_mds_map.is_resizeable() || | |
1972 | !mds_map.is_resizeable()) { | |
1973 | dout(5) << __func__ << " mds_map is not currently resizeable" << dendl; | |
1974 | return false; | |
1975 | } | |
1976 | ||
1977 | if (in < max && !mds_map.test_flag(CEPH_MDSMAP_NOT_JOINABLE)) { | |
7c673cae | 1978 | mds_rank_t mds = mds_rank_t(0); |
1adf2230 | 1979 | while (mds_map.is_in(mds)) { |
7c673cae FG |
1980 | mds++; |
1981 | } | |
9f95a23c TL |
1982 | auto info = fsmap.find_replacement_for({fscid, mds}); |
1983 | if (!info) { | |
1adf2230 | 1984 | return false; |
7c673cae FG |
1985 | } |
1986 | ||
9f95a23c | 1987 | dout(1) << "assigned standby " << info->addrs |
7c673cae | 1988 | << " as mds." << mds << dendl; |
f67539c2 | 1989 | mon.clog->info() << info->human_name() << " assigned to " |
1adf2230 AA |
1990 | "filesystem " << mds_map.fs_name << " as rank " |
1991 | << mds << " (now has " << mds_map.get_num_in_mds() + 1 | |
d2e6a577 | 1992 | << " ranks)"; |
9f95a23c | 1993 | fsmap.promote(info->global_id, *fs, mds); |
1adf2230 | 1994 | return true; |
11fdf7f2 TL |
1995 | } else if (in > max) { |
1996 | mds_rank_t target = in - 1; | |
1997 | const auto &info = mds_map.get_info(target); | |
1998 | if (mds_map.is_active(target)) { | |
1999 | dout(1) << "stopping " << target << dendl; | |
f67539c2 | 2000 | mon.clog->info() << "stopping " << info.human_name(); |
11fdf7f2 TL |
2001 | auto f = [](auto& info) { |
2002 | info.state = MDSMap::STATE_STOPPING; | |
2003 | }; | |
2004 | fsmap.modify_daemon(info.global_id, f); | |
2005 | return true; | |
2006 | } else { | |
2007 | dout(20) << "skipping stop of " << target << dendl; | |
2008 | return false; | |
2009 | } | |
7c673cae FG |
2010 | } |
2011 | ||
1adf2230 | 2012 | return false; |
7c673cae FG |
2013 | } |
2014 | ||
2015 | ||
2016 | /** | |
9f95a23c | 2017 | * Fail a daemon and replace it with a suitable standby. |
7c673cae | 2018 | */ |
9f95a23c | 2019 | bool MDSMonitor::drop_mds(FSMap &fsmap, mds_gid_t gid, const mds_info_t* rep_info, bool *osd_propose) |
7c673cae | 2020 | { |
11fdf7f2 | 2021 | ceph_assert(osd_propose != nullptr); |
7c673cae | 2022 | |
1adf2230 | 2023 | const auto fscid = fsmap.mds_roles.at(gid); |
9f95a23c TL |
2024 | const auto& info = fsmap.get_info_gid(gid); |
2025 | const auto rank = info.rank; | |
2026 | const auto state = info.state; | |
2027 | ||
2028 | if (info.is_frozen()) { | |
2029 | return false; | |
2030 | } else if (state == MDSMap::STATE_STANDBY_REPLAY || | |
2031 | state == MDSMap::STATE_STANDBY) { | |
2032 | dout(1) << " failing and removing standby " << gid << " " << info.addrs | |
2033 | << " mds." << rank | |
2034 | << "." << info.inc << " " << ceph_mds_state_name(state) | |
2035 | << dendl; | |
2036 | *osd_propose |= fail_mds_gid(fsmap, gid); | |
2037 | return true; | |
2038 | } else if (rank >= 0 && rep_info) { | |
2039 | auto fs = fsmap.filesystems.at(fscid); | |
2040 | if (fs->mds_map.test_flag(CEPH_MDSMAP_NOT_JOINABLE)) { | |
2041 | return false; | |
2042 | } | |
2043 | // are we in? | |
2044 | // and is there a non-laggy standby that can take over for us? | |
2045 | dout(1) << " replacing " << gid << " " << info.addrs | |
2046 | << " mds." << rank << "." << info.inc | |
2047 | << " " << ceph_mds_state_name(state) | |
2048 | << " with " << rep_info->global_id << "/" << rep_info->name << " " << rep_info->addrs | |
2049 | << dendl; | |
2050 | ||
f67539c2 | 2051 | mon.clog->warn() << "Replacing " << info.human_name() |
9f95a23c TL |
2052 | << " as rank " << rank |
2053 | << " with standby " << rep_info->human_name(); | |
2054 | ||
2055 | // Remove the old one | |
2056 | *osd_propose |= fail_mds_gid(fsmap, gid); | |
2057 | ||
2058 | // Promote the replacement | |
2059 | fsmap.promote(rep_info->global_id, *fs, rank); | |
2060 | ||
2061 | return true; | |
2062 | } | |
2063 | return false; | |
2064 | } | |
2065 | ||
2066 | bool MDSMonitor::check_health(FSMap& fsmap, bool* propose_osdmap) | |
2067 | { | |
2068 | bool do_propose = false; | |
2069 | const auto now = mono_clock::now(); | |
f67539c2 | 2070 | const bool osdmap_writeable = mon.osdmon()->is_writeable(); |
9f95a23c TL |
2071 | const auto mds_beacon_grace = g_conf().get_val<double>("mds_beacon_grace"); |
2072 | const auto mds_beacon_interval = g_conf().get_val<double>("mds_beacon_interval"); | |
2073 | ||
2074 | if (mono_clock::is_zero(last_tick)) { | |
2075 | last_tick = now; | |
2076 | } | |
2077 | ||
2078 | { | |
2079 | auto since_last = std::chrono::duration<double>(now-last_tick); | |
2080 | ||
2081 | if (since_last.count() > (mds_beacon_grace-mds_beacon_interval)) { | |
2082 | // This case handles either local slowness (calls being delayed | |
2083 | // for whatever reason) or cluster election slowness (a long gap | |
2084 | // between calls while an election happened) | |
2085 | dout(1) << __func__ << ": resetting beacon timeouts due to mon delay " | |
2086 | "(slow election?) of " << since_last.count() << " seconds" << dendl; | |
2087 | for (auto& p : last_beacon) { | |
2088 | p.second.stamp = now; | |
2089 | } | |
2090 | } | |
2091 | } | |
2092 | ||
2093 | // make sure last_beacon is fully populated | |
2094 | for (auto& p : fsmap.mds_roles) { | |
2095 | auto& gid = p.first; | |
2096 | last_beacon.emplace(std::piecewise_construct, | |
2097 | std::forward_as_tuple(gid), | |
2098 | std::forward_as_tuple(now, 0)); | |
2099 | } | |
7c673cae | 2100 | |
31f18b77 | 2101 | // We will only take decisive action (replacing/removing a daemon) |
9f95a23c | 2102 | // if we have some indication that some other daemon(s) are successfully |
31f18b77 | 2103 | // getting beacons through recently. |
1adf2230 | 2104 | mono_time latest_beacon = mono_clock::zero(); |
9f95a23c | 2105 | for (const auto& p : last_beacon) { |
1adf2230 | 2106 | latest_beacon = std::max(p.second.stamp, latest_beacon); |
31f18b77 | 2107 | } |
f67539c2 | 2108 | auto since = std::chrono::duration<double>(now-latest_beacon); |
1adf2230 | 2109 | const bool may_replace = since.count() < |
11fdf7f2 | 2110 | std::max(g_conf()->mds_beacon_interval, g_conf()->mds_beacon_grace * 0.5); |
31f18b77 | 2111 | |
9f95a23c TL |
2112 | // check beacon timestamps |
2113 | std::vector<mds_gid_t> to_remove; | |
2114 | for (auto it = last_beacon.begin(); it != last_beacon.end(); ) { | |
2115 | auto& [gid, beacon_info] = *it; | |
f67539c2 | 2116 | auto since_last = std::chrono::duration<double>(now-beacon_info.stamp); |
9f95a23c TL |
2117 | |
2118 | if (!fsmap.gid_exists(gid)) { | |
2119 | // gid no longer exists, remove from tracked beacons | |
2120 | it = last_beacon.erase(it); | |
2121 | continue; | |
2122 | } | |
7c673cae | 2123 | |
9f95a23c TL |
2124 | if (since_last.count() >= g_conf()->mds_beacon_grace) { |
2125 | auto& info = fsmap.get_info_gid(gid); | |
2126 | dout(1) << "no beacon from mds." << info.rank << "." << info.inc | |
2127 | << " (gid: " << gid << " addr: " << info.addrs | |
2128 | << " state: " << ceph_mds_state_name(info.state) << ")" | |
2129 | << " since " << since_last.count() << dendl; | |
f67539c2 | 2130 | // If the OSDMap is writeable, we can blocklist things, so we can |
9f95a23c TL |
2131 | // try failing any laggy MDS daemons. Consider each one for failure. |
2132 | if (!info.laggy()) { | |
2133 | dout(1) << " marking " << gid << " " << info.addrs | |
2134 | << " mds." << info.rank << "." << info.inc | |
2135 | << " " << ceph_mds_state_name(info.state) | |
2136 | << " laggy" << dendl; | |
2137 | fsmap.modify_daemon(info.global_id, [](auto& info) { | |
2138 | info.laggy_since = ceph_clock_now(); | |
2139 | }); | |
2140 | do_propose = true; | |
2141 | } | |
2142 | if (osdmap_writeable && may_replace) { | |
2143 | to_remove.push_back(gid); // drop_mds may invalidate iterator | |
2144 | } | |
2145 | } | |
31f18b77 | 2146 | |
9f95a23c TL |
2147 | ++it; |
2148 | } | |
7c673cae | 2149 | |
9f95a23c | 2150 | for (const auto& gid : to_remove) { |
f6b5b4d7 | 2151 | auto info = fsmap.get_info_gid(gid); |
9f95a23c TL |
2152 | const mds_info_t* rep_info = nullptr; |
2153 | if (info.rank >= 0) { | |
f67539c2 | 2154 | auto fscid = fsmap.fscid_from_gid(gid); |
9f95a23c TL |
2155 | rep_info = fsmap.find_replacement_for({fscid, info.rank}); |
2156 | } | |
2157 | bool dropped = drop_mds(fsmap, gid, rep_info, propose_osdmap); | |
2158 | if (dropped) { | |
f67539c2 | 2159 | mon.clog->info() << "MDS " << info.human_name() |
9f95a23c TL |
2160 | << " is removed because it is dead or otherwise unavailable."; |
2161 | do_propose = true; | |
2162 | } | |
2163 | } | |
7c673cae | 2164 | |
9f95a23c TL |
2165 | if (osdmap_writeable) { |
2166 | for (auto& [fscid, fs] : fsmap.filesystems) { | |
2167 | if (!fs->mds_map.test_flag(CEPH_MDSMAP_NOT_JOINABLE) && | |
2168 | fs->mds_map.is_resizeable()) { | |
2169 | // Check if a rank or standby-replay should be replaced with a stronger | |
2170 | // affinity standby. This looks at ranks and standby-replay: | |
2171 | for (const auto& [gid, info] : fs->mds_map.get_mds_info()) { | |
2172 | const auto join_fscid = info.join_fscid; | |
2173 | if (join_fscid == fscid) | |
2174 | continue; | |
2175 | const auto rank = info.rank; | |
2176 | const auto state = info.state; | |
2177 | const mds_info_t* rep_info = nullptr; | |
2178 | if (state == MDSMap::STATE_STANDBY_REPLAY) { | |
2179 | rep_info = fsmap.get_available_standby(fscid); | |
2180 | } else if (state == MDSMap::STATE_ACTIVE) { | |
2181 | rep_info = fsmap.find_replacement_for({fscid, rank}); | |
2182 | } else { | |
2183 | /* N.B. !is_degraded() */ | |
2184 | ceph_abort_msg("invalid state in MDSMap"); | |
2185 | } | |
2186 | if (!rep_info) { | |
2187 | break; | |
2188 | } | |
2189 | bool better_affinity = false; | |
2190 | if (join_fscid == FS_CLUSTER_ID_NONE) { | |
2191 | better_affinity = (rep_info->join_fscid == fscid); | |
2192 | } else { | |
2193 | better_affinity = (rep_info->join_fscid == fscid) || | |
2194 | (rep_info->join_fscid == FS_CLUSTER_ID_NONE); | |
2195 | } | |
2196 | if (better_affinity) { | |
2197 | if (state == MDSMap::STATE_STANDBY_REPLAY) { | |
f67539c2 | 2198 | mon.clog->info() << "Dropping low affinity standby-replay " |
9f95a23c TL |
2199 | << info.human_name() |
2200 | << " in favor of higher affinity standby."; | |
2201 | *propose_osdmap |= fail_mds_gid(fsmap, gid); | |
2202 | /* Now let maybe_promote_standby do the promotion. */ | |
2203 | } else { | |
f67539c2 | 2204 | mon.clog->info() << "Dropping low affinity active " |
9f95a23c TL |
2205 | << info.human_name() |
2206 | << " in favor of higher affinity standby."; | |
2207 | do_propose |= drop_mds(fsmap, gid, rep_info, propose_osdmap); | |
2208 | } | |
2209 | break; /* don't replace more than one per tick per fs */ | |
2210 | } | |
2211 | } | |
2212 | } | |
2213 | } | |
7c673cae | 2214 | } |
9f95a23c | 2215 | return do_propose; |
7c673cae FG |
2216 | } |
2217 | ||
11fdf7f2 | 2218 | bool MDSMonitor::maybe_promote_standby(FSMap &fsmap, Filesystem& fs) |
7c673cae | 2219 | { |
11fdf7f2 TL |
2220 | if (fs.mds_map.test_flag(CEPH_MDSMAP_NOT_JOINABLE)) { |
2221 | return false; | |
2222 | } | |
7c673cae FG |
2223 | |
2224 | bool do_propose = false; | |
2225 | ||
2226 | // have a standby take over? | |
2227 | set<mds_rank_t> failed; | |
11fdf7f2 TL |
2228 | fs.mds_map.get_failed_mds_set(failed); |
2229 | for (const auto& rank : failed) { | |
9f95a23c TL |
2230 | auto info = fsmap.find_replacement_for({fs.fscid, rank}); |
2231 | if (info) { | |
2232 | dout(1) << " taking over failed mds." << rank << " with " << info->global_id | |
2233 | << "/" << info->name << " " << info->addrs << dendl; | |
f67539c2 | 2234 | mon.clog->info() << "Standby " << info->human_name() |
11fdf7f2 TL |
2235 | << " assigned to filesystem " << fs.mds_map.fs_name |
2236 | << " as rank " << rank; | |
2237 | ||
9f95a23c | 2238 | fsmap.promote(info->global_id, fs, rank); |
11fdf7f2 | 2239 | do_propose = true; |
7c673cae | 2240 | } |
11fdf7f2 TL |
2241 | } |
2242 | ||
f67539c2 | 2243 | if (fs.mds_map.is_resizeable() && fs.mds_map.allows_standby_replay()) { |
7c673cae | 2244 | // There were no failures to replace, so try using any available standbys |
a8e16298 TL |
2245 | // as standby-replay daemons. Don't do this when the cluster is degraded |
2246 | // as a standby-replay daemon may try to read a journal being migrated. | |
11fdf7f2 | 2247 | for (;;) { |
9f95a23c TL |
2248 | auto info = fsmap.get_available_standby(fs.fscid); |
2249 | if (!info) break; | |
2250 | dout(20) << "standby available mds." << info->global_id << dendl; | |
11fdf7f2 TL |
2251 | bool changed = false; |
2252 | for (const auto& rank : fs.mds_map.in) { | |
9f95a23c | 2253 | dout(20) << "examining " << rank << dendl; |
11fdf7f2 | 2254 | if (fs.mds_map.is_followable(rank)) { |
9f95a23c | 2255 | dout(1) << " setting mds." << info->global_id |
11fdf7f2 | 2256 | << " to follow mds rank " << rank << dendl; |
9f95a23c | 2257 | fsmap.assign_standby_replay(info->global_id, fs.fscid, rank); |
11fdf7f2 TL |
2258 | do_propose = true; |
2259 | changed = true; | |
2260 | break; | |
7c673cae | 2261 | } |
7c673cae | 2262 | } |
11fdf7f2 | 2263 | if (!changed) break; |
7c673cae FG |
2264 | } |
2265 | } | |
2266 | ||
2267 | return do_propose; | |
2268 | } | |
2269 | ||
2270 | void MDSMonitor::tick() | |
2271 | { | |
1adf2230 | 2272 | if (!is_active() || !is_leader()) return; |
28e407b8 AA |
2273 | |
2274 | auto &pending = get_pending_fsmap_writeable(); | |
7c673cae | 2275 | |
28e407b8 | 2276 | bool do_propose = false; |
9f95a23c | 2277 | bool propose_osdmap = false; |
7c673cae | 2278 | |
28e407b8 | 2279 | do_propose |= pending.check_health(); |
7c673cae | 2280 | |
9f95a23c TL |
2281 | /* Check health and affinity of ranks */ |
2282 | do_propose |= check_health(pending, &propose_osdmap); | |
7c673cae | 2283 | |
9f95a23c TL |
2284 | /* Resize the cluster according to max_mds. */ |
2285 | for (auto& p : pending.filesystems) { | |
2286 | do_propose |= maybe_resize_cluster(pending, p.second->fscid); | |
7c673cae FG |
2287 | } |
2288 | ||
9f95a23c TL |
2289 | /* Replace any failed ranks. */ |
2290 | for (auto& p : pending.filesystems) { | |
2291 | do_propose |= maybe_promote_standby(pending, *p.second); | |
7c673cae FG |
2292 | } |
2293 | ||
c07f9fc5 | 2294 | if (propose_osdmap) { |
f67539c2 | 2295 | request_proposal(mon.osdmon()); |
c07f9fc5 | 2296 | } |
7c673cae | 2297 | |
7c673cae FG |
2298 | if (do_propose) { |
2299 | propose_pending(); | |
2300 | } | |
9f95a23c TL |
2301 | |
2302 | last_tick = mono_clock::now(); | |
7c673cae FG |
2303 | } |
2304 | ||
f67539c2 | 2305 | MDSMonitor::MDSMonitor(Monitor &mn, Paxos &p, string service_name) |
7c673cae FG |
2306 | : PaxosService(mn, p, service_name) |
2307 | { | |
f67539c2 | 2308 | handlers = FileSystemCommandHandler::load(&p); |
7c673cae FG |
2309 | } |
2310 | ||
2311 | void MDSMonitor::on_restart() | |
2312 | { | |
2313 | // Clear out the leader-specific state. | |
1adf2230 | 2314 | last_tick = mono_clock::now(); |
7c673cae FG |
2315 | last_beacon.clear(); |
2316 | } | |
2317 |