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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, | |
20effc67 | 89 | std::string_view 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, |
20effc67 | 95 | std::string_view 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, |
20effc67 | 101 | std::string_view 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; |
522d829b TL |
149 | try { |
150 | PaxosFSMap::decode(fsmap_bl); | |
151 | } catch (const ceph::buffer::malformed_input& e) { | |
152 | derr << "unable to decode FSMap: " << e.what() << dendl; | |
153 | throw; | |
154 | } | |
7c673cae FG |
155 | |
156 | // new map | |
91327a77 | 157 | dout(0) << "new map" << dendl; |
11fdf7f2 TL |
158 | print_map<0>(get_fsmap()); |
159 | if (!g_conf()->mon_mds_skip_sanity) { | |
28e407b8 | 160 | get_fsmap().sanity(); |
7c673cae FG |
161 | } |
162 | ||
163 | check_subs(); | |
7c673cae FG |
164 | } |
165 | ||
166 | void MDSMonitor::init() | |
167 | { | |
168 | (void)load_metadata(pending_metadata); | |
169 | } | |
170 | ||
171 | void MDSMonitor::create_pending() | |
172 | { | |
28e407b8 | 173 | auto &fsmap = PaxosFSMap::create_pending(); |
7c673cae | 174 | |
f67539c2 TL |
175 | if (mon.osdmon()->is_readable()) { |
176 | const auto &osdmap = mon.osdmon()->osdmap; | |
28e407b8 | 177 | fsmap.sanitize([&osdmap](int64_t pool){return osdmap.have_pg_pool(pool);}); |
3efd9988 FG |
178 | } |
179 | ||
28e407b8 | 180 | dout(10) << "create_pending e" << fsmap.epoch << dendl; |
7c673cae FG |
181 | } |
182 | ||
183 | void MDSMonitor::encode_pending(MonitorDBStore::TransactionRef t) | |
184 | { | |
28e407b8 AA |
185 | auto &pending = get_pending_fsmap_writeable(); |
186 | auto &epoch = pending.epoch; | |
7c673cae | 187 | |
28e407b8 | 188 | dout(10) << "encode_pending e" << epoch << dendl; |
7c673cae FG |
189 | |
190 | // print map iff 'debug mon = 30' or higher | |
11fdf7f2 TL |
191 | print_map<30>(pending); |
192 | if (!g_conf()->mon_mds_skip_sanity) { | |
a4b75251 | 193 | pending.sanity(true); |
7c673cae FG |
194 | } |
195 | ||
196 | // Set 'modified' on maps modified this epoch | |
28e407b8 AA |
197 | for (auto &p : pending.filesystems) { |
198 | if (p.second->mds_map.epoch == epoch) { | |
199 | p.second->mds_map.modified = ceph_clock_now(); | |
7c673cae FG |
200 | } |
201 | } | |
202 | ||
203 | // apply to paxos | |
11fdf7f2 | 204 | ceph_assert(get_last_committed() + 1 == pending.epoch); |
28e407b8 | 205 | bufferlist pending_bl; |
f67539c2 | 206 | pending.encode(pending_bl, mon.get_quorum_con_features()); |
7c673cae FG |
207 | |
208 | /* put everything in the transaction */ | |
28e407b8 AA |
209 | put_version(t, pending.epoch, pending_bl); |
210 | put_last_committed(t, pending.epoch); | |
7c673cae FG |
211 | |
212 | // Encode MDSHealth data | |
213 | for (std::map<uint64_t, MDSHealth>::iterator i = pending_daemon_health.begin(); | |
214 | i != pending_daemon_health.end(); ++i) { | |
215 | bufferlist bl; | |
216 | i->second.encode(bl); | |
217 | t->put(MDS_HEALTH_PREFIX, stringify(i->first), bl); | |
218 | } | |
219 | ||
220 | for (std::set<uint64_t>::iterator i = pending_daemon_health_rm.begin(); | |
221 | i != pending_daemon_health_rm.end(); ++i) { | |
222 | t->erase(MDS_HEALTH_PREFIX, stringify(*i)); | |
223 | } | |
224 | pending_daemon_health_rm.clear(); | |
1adf2230 | 225 | remove_from_metadata(pending, t); |
224ce89b WB |
226 | |
227 | // health | |
228 | health_check_map_t new_checks; | |
28e407b8 | 229 | const auto &info_map = pending.get_mds_info(); |
224ce89b WB |
230 | for (const auto &i : info_map) { |
231 | const auto &gid = i.first; | |
232 | const auto &info = i.second; | |
233 | if (pending_daemon_health_rm.count(gid)) { | |
234 | continue; | |
235 | } | |
236 | MDSHealth health; | |
237 | auto p = pending_daemon_health.find(gid); | |
238 | if (p != pending_daemon_health.end()) { | |
239 | health = p->second; | |
240 | } else { | |
241 | bufferlist bl; | |
f67539c2 | 242 | mon.store->get(MDS_HEALTH_PREFIX, stringify(gid), bl); |
224ce89b WB |
243 | if (!bl.length()) { |
244 | derr << "Missing health data for MDS " << gid << dendl; | |
245 | continue; | |
246 | } | |
11fdf7f2 | 247 | auto bl_i = bl.cbegin(); |
224ce89b WB |
248 | health.decode(bl_i); |
249 | } | |
250 | for (const auto &metric : health.metrics) { | |
9f95a23c | 251 | const auto rank = info.rank; |
224ce89b WB |
252 | health_check_t *check = &new_checks.get_or_add( |
253 | mds_metric_name(metric.type), | |
254 | metric.sev, | |
9f95a23c TL |
255 | mds_metric_summary(metric.type), |
256 | 1); | |
224ce89b | 257 | ostringstream ss; |
f91f0fd5 | 258 | ss << "mds." << info.name << "(mds." << rank << "): " << metric.message; |
28e407b8 AA |
259 | bool first = true; |
260 | for (auto &p : metric.metadata) { | |
261 | if (first) { | |
262 | ss << " "; | |
263 | } else { | |
224ce89b | 264 | ss << ", "; |
28e407b8 AA |
265 | } |
266 | ss << p.first << ": " << p.second; | |
267 | first = false; | |
224ce89b WB |
268 | } |
269 | check->detail.push_back(ss.str()); | |
270 | } | |
271 | } | |
28e407b8 | 272 | pending.get_health_checks(&new_checks); |
224ce89b | 273 | for (auto& p : new_checks.checks) { |
11fdf7f2 | 274 | p.second.summary = std::regex_replace( |
224ce89b | 275 | p.second.summary, |
11fdf7f2 | 276 | std::regex("%num%"), |
224ce89b | 277 | stringify(p.second.detail.size())); |
11fdf7f2 | 278 | p.second.summary = std::regex_replace( |
224ce89b | 279 | p.second.summary, |
11fdf7f2 | 280 | std::regex("%plurals%"), |
224ce89b | 281 | p.second.detail.size() > 1 ? "s" : ""); |
11fdf7f2 | 282 | p.second.summary = std::regex_replace( |
224ce89b | 283 | p.second.summary, |
11fdf7f2 | 284 | std::regex("%isorare%"), |
224ce89b | 285 | p.second.detail.size() > 1 ? "are" : "is"); |
11fdf7f2 | 286 | p.second.summary = std::regex_replace( |
181888fb | 287 | p.second.summary, |
11fdf7f2 | 288 | std::regex("%hasorhave%"), |
181888fb | 289 | p.second.detail.size() > 1 ? "have" : "has"); |
224ce89b WB |
290 | } |
291 | encode_health(new_checks, t); | |
7c673cae FG |
292 | } |
293 | ||
11fdf7f2 | 294 | version_t MDSMonitor::get_trim_to() const |
7c673cae FG |
295 | { |
296 | version_t floor = 0; | |
11fdf7f2 | 297 | if (g_conf()->mon_mds_force_trim_to > 0 && |
522d829b | 298 | g_conf()->mon_mds_force_trim_to <= (int)get_last_committed()) { |
11fdf7f2 | 299 | floor = g_conf()->mon_mds_force_trim_to; |
7c673cae FG |
300 | dout(10) << __func__ << " explicit mon_mds_force_trim_to = " |
301 | << floor << dendl; | |
302 | } | |
303 | ||
11fdf7f2 | 304 | unsigned max = g_conf()->mon_max_mdsmap_epochs; |
7c673cae FG |
305 | version_t last = get_last_committed(); |
306 | ||
522d829b TL |
307 | if (last - get_first_committed() > max && floor < last - max) { |
308 | floor = last-max; | |
309 | } | |
310 | ||
311 | dout(20) << __func__ << " = " << floor << dendl; | |
7c673cae FG |
312 | return floor; |
313 | } | |
314 | ||
7c673cae FG |
315 | bool MDSMonitor::preprocess_query(MonOpRequestRef op) |
316 | { | |
317 | op->mark_mdsmon_event(__func__); | |
9f95a23c | 318 | auto m = op->get_req<PaxosServiceMessage>(); |
11fdf7f2 TL |
319 | dout(10) << "preprocess_query " << *m << " from " << m->get_orig_source() |
320 | << " " << m->get_orig_source_addrs() << dendl; | |
7c673cae FG |
321 | |
322 | switch (m->get_type()) { | |
323 | ||
324 | case MSG_MDS_BEACON: | |
325 | return preprocess_beacon(op); | |
326 | ||
327 | case MSG_MON_COMMAND: | |
f64942e4 AA |
328 | try { |
329 | return preprocess_command(op); | |
11fdf7f2 | 330 | } catch (const bad_cmd_get& e) { |
f64942e4 | 331 | bufferlist bl; |
f67539c2 | 332 | mon.reply_command(op, -EINVAL, e.what(), bl, get_last_committed()); |
f64942e4 AA |
333 | return true; |
334 | } | |
7c673cae FG |
335 | |
336 | case MSG_MDS_OFFLOAD_TARGETS: | |
337 | return preprocess_offload_targets(op); | |
338 | ||
339 | default: | |
340 | ceph_abort(); | |
341 | return true; | |
342 | } | |
343 | } | |
344 | ||
345 | void MDSMonitor::_note_beacon(MMDSBeacon *m) | |
346 | { | |
347 | mds_gid_t gid = mds_gid_t(m->get_global_id()); | |
348 | version_t seq = m->get_seq(); | |
349 | ||
91327a77 | 350 | dout(5) << "_note_beacon " << *m << " noting time" << dendl; |
1adf2230 AA |
351 | auto &beacon = last_beacon[gid]; |
352 | beacon.stamp = mono_clock::now(); | |
353 | beacon.seq = seq; | |
7c673cae FG |
354 | } |
355 | ||
356 | bool MDSMonitor::preprocess_beacon(MonOpRequestRef op) | |
357 | { | |
358 | op->mark_mdsmon_event(__func__); | |
9f95a23c | 359 | auto m = op->get_req<MMDSBeacon>(); |
7c673cae FG |
360 | MDSMap::DaemonState state = m->get_state(); |
361 | mds_gid_t gid = m->get_global_id(); | |
362 | version_t seq = m->get_seq(); | |
363 | MDSMap::mds_info_t info; | |
364 | epoch_t effective_epoch = 0; | |
365 | ||
1adf2230 | 366 | const auto &fsmap = get_fsmap(); |
28e407b8 | 367 | |
7c673cae | 368 | // check privileges, ignore if fails |
11fdf7f2 TL |
369 | MonSession *session = op->get_session(); |
370 | if (!session) | |
371 | goto ignore; | |
7c673cae FG |
372 | if (!session->is_capable("mds", MON_CAP_X)) { |
373 | dout(0) << "preprocess_beacon got MMDSBeacon from entity with insufficient privileges " | |
374 | << session->caps << dendl; | |
375 | goto ignore; | |
376 | } | |
377 | ||
f67539c2 TL |
378 | if (m->get_fsid() != mon.monmap->fsid) { |
379 | dout(0) << "preprocess_beacon on fsid " << m->get_fsid() << " != " << mon.monmap->fsid << dendl; | |
7c673cae FG |
380 | goto ignore; |
381 | } | |
382 | ||
91327a77 | 383 | dout(5) << "preprocess_beacon " << *m |
11fdf7f2 TL |
384 | << " from " << m->get_orig_source() |
385 | << " " << m->get_orig_source_addrs() | |
7c673cae FG |
386 | << " " << m->get_compat() |
387 | << dendl; | |
388 | ||
389 | // make sure the address has a port | |
390 | if (m->get_orig_source_addr().get_port() == 0) { | |
391 | dout(1) << " ignoring boot message without a port" << dendl; | |
392 | goto ignore; | |
393 | } | |
394 | ||
7c673cae | 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 | */ | |
522d829b | 409 | auto m = make_message<MMDSMap>(mon.monmap->fsid, MDSMap::create_null_mdsmap()); |
f67539c2 | 410 | mon.send_reply(op, m.detach()); |
7c673cae FG |
411 | return true; |
412 | } else { | |
413 | return false; // not booted yet. | |
414 | } | |
415 | } | |
416 | dout(10) << __func__ << ": GID exists in map: " << gid << dendl; | |
28e407b8 | 417 | info = fsmap.get_info_gid(gid); |
7c673cae | 418 | |
f91f0fd5 TL |
419 | if (state == MDSMap::STATE_DNE) { |
420 | return false; | |
421 | } | |
422 | ||
7c673cae FG |
423 | // old seq? |
424 | if (info.state_seq > seq) { | |
425 | dout(7) << "mds_beacon " << *m << " has old seq, ignoring" << dendl; | |
426 | goto ignore; | |
427 | } | |
428 | ||
429 | // Work out the latest epoch that this daemon should have seen | |
430 | { | |
28e407b8 | 431 | fs_cluster_id_t fscid = fsmap.mds_roles.at(gid); |
7c673cae | 432 | if (fscid == FS_CLUSTER_ID_NONE) { |
28e407b8 | 433 | effective_epoch = fsmap.standby_epochs.at(gid); |
7c673cae | 434 | } else { |
28e407b8 | 435 | effective_epoch = fsmap.get_filesystem(fscid)->mds_map.epoch; |
7c673cae FG |
436 | } |
437 | if (effective_epoch != m->get_last_epoch_seen()) { | |
438 | dout(10) << "mds_beacon " << *m | |
439 | << " ignoring requested state, because mds hasn't seen latest map" << dendl; | |
440 | goto reply; | |
441 | } | |
442 | } | |
443 | ||
444 | if (info.laggy()) { | |
445 | _note_beacon(m); | |
446 | return false; // no longer laggy, need to update map. | |
447 | } | |
448 | if (state == MDSMap::STATE_BOOT) { | |
449 | // ignore, already booted. | |
450 | goto ignore; | |
451 | } | |
9f95a23c TL |
452 | |
453 | // did the join_fscid change | |
454 | if (m->get_fs().size()) { | |
455 | fs_cluster_id_t fscid = FS_CLUSTER_ID_NONE; | |
456 | auto f = fsmap.get_filesystem(m->get_fs()); | |
457 | if (f) { | |
458 | fscid = f->fscid; | |
459 | } | |
460 | if (info.join_fscid != fscid) { | |
461 | dout(10) << __func__ << " standby mds_join_fs changed to " << fscid | |
462 | << " (" << m->get_fs() << ")" << dendl; | |
463 | _note_beacon(m); | |
464 | return false; | |
465 | } | |
466 | } else { | |
467 | if (info.join_fscid != FS_CLUSTER_ID_NONE) { | |
468 | dout(10) << __func__ << " standby mds_join_fs was cleared" << dendl; | |
469 | _note_beacon(m); | |
470 | return false; | |
471 | } | |
472 | } | |
473 | ||
7c673cae FG |
474 | // is there a state change here? |
475 | if (info.state != state) { | |
7c673cae FG |
476 | _note_beacon(m); |
477 | return false; | |
478 | } | |
479 | ||
480 | // Comparing known daemon health with m->get_health() | |
481 | // and return false (i.e. require proposal) if they | |
482 | // do not match, to update our stored | |
483 | if (!(pending_daemon_health[gid] == m->get_health())) { | |
91327a77 | 484 | dout(10) << __func__ << " health metrics for gid " << gid << " were updated" << dendl; |
7c673cae FG |
485 | _note_beacon(m); |
486 | return false; | |
487 | } | |
488 | ||
489 | reply: | |
490 | // note time and reply | |
11fdf7f2 | 491 | ceph_assert(effective_epoch > 0); |
7c673cae | 492 | _note_beacon(m); |
11fdf7f2 | 493 | { |
f67539c2 | 494 | auto beacon = make_message<MMDSBeacon>(mon.monmap->fsid, |
11fdf7f2 TL |
495 | m->get_global_id(), m->get_name(), effective_epoch, |
496 | state, seq, CEPH_FEATURES_SUPPORTED_DEFAULT); | |
f67539c2 | 497 | mon.send_reply(op, beacon.detach()); |
11fdf7f2 | 498 | } |
7c673cae FG |
499 | return true; |
500 | ||
501 | ignore: | |
502 | // I won't reply this beacon, drop it. | |
f67539c2 | 503 | mon.no_reply(op); |
7c673cae FG |
504 | return true; |
505 | } | |
506 | ||
507 | bool MDSMonitor::preprocess_offload_targets(MonOpRequestRef op) | |
508 | { | |
509 | op->mark_mdsmon_event(__func__); | |
9f95a23c | 510 | auto m = op->get_req<MMDSLoadTargets>(); |
7c673cae | 511 | dout(10) << "preprocess_offload_targets " << *m << " from " << m->get_orig_source() << dendl; |
28e407b8 | 512 | |
1adf2230 | 513 | const auto &fsmap = get_fsmap(); |
7c673cae FG |
514 | |
515 | // check privileges, ignore message if fails | |
11fdf7f2 | 516 | MonSession *session = op->get_session(); |
7c673cae | 517 | if (!session) |
1adf2230 | 518 | goto ignore; |
7c673cae FG |
519 | if (!session->is_capable("mds", MON_CAP_X)) { |
520 | dout(0) << "preprocess_offload_targets got MMDSLoadTargets from entity with insufficient caps " | |
521 | << session->caps << dendl; | |
1adf2230 | 522 | goto ignore; |
7c673cae FG |
523 | } |
524 | ||
525 | if (fsmap.gid_exists(m->global_id) && | |
526 | m->targets == fsmap.get_info_gid(m->global_id).export_targets) | |
1adf2230 | 527 | goto ignore; |
7c673cae FG |
528 | |
529 | return false; | |
530 | ||
1adf2230 | 531 | ignore: |
f67539c2 | 532 | mon.no_reply(op); |
7c673cae FG |
533 | return true; |
534 | } | |
535 | ||
536 | ||
537 | bool MDSMonitor::prepare_update(MonOpRequestRef op) | |
538 | { | |
539 | op->mark_mdsmon_event(__func__); | |
9f95a23c | 540 | auto m = op->get_req<PaxosServiceMessage>(); |
7c673cae FG |
541 | dout(7) << "prepare_update " << *m << dendl; |
542 | ||
543 | switch (m->get_type()) { | |
544 | ||
545 | case MSG_MDS_BEACON: | |
546 | return prepare_beacon(op); | |
547 | ||
548 | case MSG_MON_COMMAND: | |
f64942e4 AA |
549 | try { |
550 | return prepare_command(op); | |
11fdf7f2 | 551 | } catch (const bad_cmd_get& e) { |
f64942e4 | 552 | bufferlist bl; |
f67539c2 | 553 | mon.reply_command(op, -EINVAL, e.what(), bl, get_last_committed()); |
f64942e4 AA |
554 | return true; |
555 | } | |
7c673cae FG |
556 | |
557 | case MSG_MDS_OFFLOAD_TARGETS: | |
558 | return prepare_offload_targets(op); | |
559 | ||
560 | default: | |
561 | ceph_abort(); | |
562 | } | |
563 | ||
564 | return true; | |
565 | } | |
566 | ||
567 | bool MDSMonitor::prepare_beacon(MonOpRequestRef op) | |
568 | { | |
569 | op->mark_mdsmon_event(__func__); | |
9f95a23c | 570 | auto m = op->get_req<MMDSBeacon>(); |
7c673cae | 571 | // -- this is an update -- |
11fdf7f2 TL |
572 | dout(12) << "prepare_beacon " << *m << " from " << m->get_orig_source() |
573 | << " " << m->get_orig_source_addrs() << dendl; | |
574 | entity_addrvec_t addrs = m->get_orig_source_addrs(); | |
7c673cae FG |
575 | mds_gid_t gid = m->get_global_id(); |
576 | MDSMap::DaemonState state = m->get_state(); | |
577 | version_t seq = m->get_seq(); | |
578 | ||
28e407b8 AA |
579 | auto &pending = get_pending_fsmap_writeable(); |
580 | ||
91327a77 | 581 | dout(15) << __func__ << " got health from gid " << gid << " with " << m->get_health().metrics.size() << " metrics." << dendl; |
7c673cae FG |
582 | |
583 | // Calculate deltas of health metrics created and removed | |
584 | // Do this by type rather than MDSHealthMetric equality, because messages can | |
585 | // change a lot when they include e.g. a number of items. | |
586 | const auto &old_health = pending_daemon_health[gid].metrics; | |
587 | const auto &new_health = m->get_health().metrics; | |
588 | ||
589 | std::set<mds_metric_t> old_types; | |
590 | for (const auto &i : old_health) { | |
591 | old_types.insert(i.type); | |
592 | } | |
593 | ||
594 | std::set<mds_metric_t> new_types; | |
595 | for (const auto &i : new_health) { | |
596 | new_types.insert(i.type); | |
597 | } | |
598 | ||
599 | for (const auto &new_metric: new_health) { | |
600 | if (old_types.count(new_metric.type) == 0) { | |
11fdf7f2 | 601 | dout(10) << "MDS health message (" << m->get_orig_source() |
28e407b8 | 602 | << "): " << new_metric.sev << " " << new_metric.message << dendl; |
7c673cae FG |
603 | } |
604 | } | |
605 | ||
606 | // Log the disappearance of health messages at INFO | |
607 | for (const auto &old_metric : old_health) { | |
608 | if (new_types.count(old_metric.type) == 0) { | |
f67539c2 | 609 | mon.clog->info() << "MDS health message cleared (" |
11fdf7f2 | 610 | << m->get_orig_source() << "): " << old_metric.message; |
7c673cae FG |
611 | } |
612 | } | |
613 | ||
614 | // Store health | |
615 | pending_daemon_health[gid] = m->get_health(); | |
616 | ||
522d829b | 617 | const auto& cs = m->get_compat(); |
7c673cae FG |
618 | if (state == MDSMap::STATE_BOOT) { |
619 | // zap previous instance of this name? | |
11fdf7f2 | 620 | if (g_conf()->mds_enforce_unique_name) { |
7c673cae | 621 | bool failed_mds = false; |
28e407b8 | 622 | while (mds_gid_t existing = pending.find_mds_gid_by_name(m->get_name())) { |
f67539c2 TL |
623 | if (!mon.osdmon()->is_writeable()) { |
624 | mon.osdmon()->wait_for_writeable(op, new C_RetryMessage(this, op)); | |
7c673cae FG |
625 | return false; |
626 | } | |
522d829b | 627 | const auto& existing_info = pending.get_info_gid(existing); |
f67539c2 | 628 | mon.clog->info() << existing_info.human_name() << " restarted"; |
1adf2230 | 629 | fail_mds_gid(pending, existing); |
7c673cae FG |
630 | failed_mds = true; |
631 | } | |
632 | if (failed_mds) { | |
f67539c2 TL |
633 | ceph_assert(mon.osdmon()->is_writeable()); |
634 | request_proposal(mon.osdmon()); | |
7c673cae FG |
635 | } |
636 | } | |
637 | ||
638 | // Add this daemon to the map | |
28e407b8 | 639 | if (pending.mds_roles.count(gid) == 0) { |
7c673cae FG |
640 | MDSMap::mds_info_t new_info; |
641 | new_info.global_id = gid; | |
642 | new_info.name = m->get_name(); | |
11fdf7f2 | 643 | new_info.addrs = addrs; |
7c673cae FG |
644 | new_info.mds_features = m->get_mds_features(); |
645 | new_info.state = MDSMap::STATE_STANDBY; | |
646 | new_info.state_seq = seq; | |
522d829b | 647 | new_info.compat = cs; |
9f95a23c TL |
648 | if (m->get_fs().size()) { |
649 | fs_cluster_id_t fscid = FS_CLUSTER_ID_NONE; | |
650 | auto f = pending.get_filesystem(m->get_fs()); | |
651 | if (f) { | |
652 | fscid = f->fscid; | |
653 | } | |
654 | new_info.join_fscid = fscid; | |
655 | } | |
522d829b | 656 | pending.insert(new_info); |
7c673cae FG |
657 | } |
658 | ||
7c673cae | 659 | // initialize the beacon timer |
1adf2230 AA |
660 | auto &beacon = last_beacon[gid]; |
661 | beacon.stamp = mono_clock::now(); | |
662 | beacon.seq = seq; | |
7c673cae | 663 | |
7c673cae FG |
664 | update_metadata(m->get_global_id(), m->get_sys_info()); |
665 | } else { | |
666 | // state update | |
91327a77 AA |
667 | |
668 | if (!pending.gid_exists(gid)) { | |
669 | /* gid has been removed from pending, send null map */ | |
670 | dout(5) << "mds_beacon " << *m << " is not in fsmap (state " | |
671 | << ceph_mds_state_name(state) << ")" << dendl; | |
672 | ||
673 | /* We can't send an MDSMap this MDS was a part of because we no longer | |
674 | * know which FS it was part of. Nor does this matter. Sending an empty | |
675 | * MDSMap is sufficient for getting the MDS to respawn. | |
676 | */ | |
a4b75251 | 677 | goto null; |
91327a77 AA |
678 | } |
679 | ||
11fdf7f2 | 680 | const auto& info = pending.get_info_gid(gid); |
522d829b TL |
681 | |
682 | // did the reported compat change? That's illegal! | |
683 | if (cs.compare(info.compat) != 0) { | |
684 | if (!mon.osdmon()->is_writeable()) { | |
685 | mon.osdmon()->wait_for_writeable(op, new C_RetryMessage(this, op)); | |
686 | return false; | |
687 | } | |
688 | mon.clog->warn() << info.human_name() << " compat changed unexpectedly"; | |
689 | fail_mds_gid(pending, gid); | |
690 | request_proposal(mon.osdmon()); | |
691 | return true; | |
692 | } | |
693 | ||
a4b75251 TL |
694 | // legal state change? |
695 | if ((info.state == MDSMap::STATE_STANDBY && state > 0) || | |
696 | (info.state == MDSMap::STATE_STANDBY_REPLAY && state > 0 && state != MDSMap::STATE_DAMAGED)) { | |
697 | /* N.B.: standby-replay can indicate the rank is damaged due to failure to replay */ | |
698 | dout(10) << "mds_beacon mds can't activate itself (" << ceph_mds_state_name(info.state) | |
699 | << " -> " << ceph_mds_state_name(state) << ")" << dendl; | |
700 | goto evict; | |
701 | } else if ((state == MDSMap::STATE_STANDBY || state == MDSMap::STATE_STANDBY_REPLAY) | |
702 | && info.rank != MDS_RANK_NONE) | |
703 | { | |
704 | dout(4) << "mds_beacon MDS can't go back into standby after taking rank: " | |
705 | "held rank " << info.rank << " while requesting state " | |
706 | << ceph_mds_state_name(state) << dendl; | |
707 | goto evict; | |
708 | } else if (info.state == MDSMap::STATE_STOPPING && | |
f64942e4 AA |
709 | state != MDSMap::STATE_STOPPING && |
710 | state != MDSMap::STATE_STOPPED) { | |
7c673cae FG |
711 | // we can't transition to any other states from STOPPING |
712 | dout(0) << "got beacon for MDS in STATE_STOPPING, ignoring requested state change" | |
713 | << dendl; | |
a4b75251 | 714 | goto evict; |
7c673cae FG |
715 | } |
716 | ||
717 | if (info.laggy()) { | |
11fdf7f2 TL |
718 | dout(1) << "prepare_beacon clearing laggy flag on " << addrs << dendl; |
719 | pending.modify_daemon(info.global_id, [](auto& info) | |
7c673cae | 720 | { |
11fdf7f2 | 721 | info.clear_laggy(); |
7c673cae FG |
722 | } |
723 | ); | |
724 | } | |
9f95a23c | 725 | |
91327a77 | 726 | dout(5) << "prepare_beacon mds." << info.rank |
7c673cae FG |
727 | << " " << ceph_mds_state_name(info.state) |
728 | << " -> " << ceph_mds_state_name(state) | |
7c673cae | 729 | << dendl; |
9f95a23c TL |
730 | |
731 | fs_cluster_id_t fscid = FS_CLUSTER_ID_NONE; | |
732 | if (m->get_fs().size()) { | |
733 | auto f = pending.get_filesystem(m->get_fs()); | |
734 | if (f) { | |
735 | fscid = f->fscid; | |
736 | } | |
737 | } | |
738 | pending.modify_daemon(gid, [fscid](auto& info) { | |
739 | info.join_fscid = fscid; | |
740 | }); | |
741 | ||
7c673cae | 742 | if (state == MDSMap::STATE_STOPPED) { |
28e407b8 AA |
743 | const auto fscid = pending.mds_roles.at(gid); |
744 | const auto &fs = pending.get_filesystem(fscid); | |
181888fb | 745 | |
f67539c2 | 746 | mon.clog->info() << info.human_name() << " finished " |
11fdf7f2 | 747 | << "stopping rank " << info.rank << " in filesystem " |
d2e6a577 | 748 | << fs->mds_map.fs_name << " (now has " |
181888fb | 749 | << fs->mds_map.get_num_in_mds() - 1 << " ranks)"; |
d2e6a577 | 750 | |
28e407b8 | 751 | auto erased = pending.stop(gid); |
7c673cae FG |
752 | erased.push_back(gid); |
753 | ||
9f95a23c | 754 | for (const auto& erased_gid : erased) { |
7c673cae FG |
755 | last_beacon.erase(erased_gid); |
756 | if (pending_daemon_health.count(erased_gid)) { | |
757 | pending_daemon_health.erase(erased_gid); | |
758 | pending_daemon_health_rm.insert(erased_gid); | |
759 | } | |
760 | } | |
761 | } else if (state == MDSMap::STATE_DAMAGED) { | |
f67539c2 | 762 | if (!mon.osdmon()->is_writeable()) { |
91327a77 | 763 | dout(1) << __func__ << ": DAMAGED from rank " << info.rank |
f67539c2 TL |
764 | << " waiting for osdmon writeable to blocklist it" << dendl; |
765 | mon.osdmon()->wait_for_writeable(op, new C_RetryMessage(this, op)); | |
7c673cae FG |
766 | return false; |
767 | } | |
768 | ||
a4b75251 TL |
769 | auto rank = info.rank; |
770 | ||
7c673cae FG |
771 | // Record this MDS rank as damaged, so that other daemons |
772 | // won't try to run it. | |
a4b75251 TL |
773 | dout(0) << __func__ << ": marking rank " << rank << " damaged" << dendl; |
774 | ||
775 | auto fs = pending.get_filesystem(gid); | |
776 | auto rankgid = fs->mds_map.get_gid(rank); | |
777 | auto rankinfo = pending.get_info_gid(rankgid); | |
778 | auto followergid = fs->mds_map.get_standby_replay(rank); | |
779 | ||
780 | ceph_assert(gid == rankgid || gid == followergid); | |
7c673cae FG |
781 | |
782 | utime_t until = ceph_clock_now(); | |
f67539c2 | 783 | until += g_conf().get_val<double>("mon_mds_blocklist_interval"); |
a4b75251 TL |
784 | const auto blocklist_epoch = mon.osdmon()->blocklist(rankinfo.addrs, until); |
785 | if (followergid != MDS_GID_NONE) { | |
786 | fail_mds_gid(pending, followergid); | |
787 | last_beacon.erase(followergid); | |
7c673cae | 788 | } |
f67539c2 | 789 | request_proposal(mon.osdmon()); |
a4b75251 TL |
790 | pending.damaged(rankgid, blocklist_epoch); |
791 | last_beacon.erase(rankgid); | |
7c673cae | 792 | |
a4b75251 TL |
793 | /* MDS expects beacon reply back */ |
794 | } else if (state == MDSMap::STATE_DNE) { | |
795 | dout(1) << __func__ << ": DNE from " << info << dendl; | |
796 | goto evict; | |
7c673cae FG |
797 | } else if (info.state == MDSMap::STATE_STANDBY && state != info.state) { |
798 | // Standby daemons should never modify their own | |
799 | // state. Reject any attempts to do so. | |
800 | derr << "standby " << gid << " attempted to change state to " | |
801 | << ceph_mds_state_name(state) << ", rejecting" << dendl; | |
a4b75251 | 802 | goto evict; |
7c673cae FG |
803 | } else if (info.state != MDSMap::STATE_STANDBY && state != info.state && |
804 | !MDSMap::state_transition_valid(info.state, state)) { | |
805 | // Validate state transitions for daemons that hold a rank | |
806 | derr << "daemon " << gid << " (rank " << info.rank << ") " | |
807 | << "reported invalid state transition " | |
808 | << ceph_mds_state_name(info.state) << " -> " | |
809 | << ceph_mds_state_name(state) << dendl; | |
a4b75251 | 810 | goto evict; |
7c673cae | 811 | } else { |
b32b8144 | 812 | if (info.state != MDSMap::STATE_ACTIVE && state == MDSMap::STATE_ACTIVE) { |
28e407b8 AA |
813 | const auto &fscid = pending.mds_roles.at(gid); |
814 | const auto &fs = pending.get_filesystem(fscid); | |
f67539c2 | 815 | mon.clog->info() << info.human_name() << " is now active in " |
d2e6a577 FG |
816 | << "filesystem " << fs->mds_map.fs_name << " as rank " |
817 | << info.rank; | |
818 | } | |
b32b8144 FG |
819 | |
820 | // Made it through special cases and validations, record the | |
821 | // daemon's reported state to the FSMap. | |
11fdf7f2 TL |
822 | pending.modify_daemon(gid, [state, seq](auto& info) { |
823 | info.state = state; | |
824 | info.state_seq = seq; | |
b32b8144 | 825 | }); |
7c673cae FG |
826 | } |
827 | } | |
828 | ||
91327a77 | 829 | dout(5) << "prepare_beacon pending map now:" << dendl; |
28e407b8 | 830 | print_map(pending); |
7c673cae | 831 | |
9f95a23c | 832 | wait_for_finished_proposal(op, new LambdaContext([op, this](int r){ |
7c673cae FG |
833 | if (r >= 0) |
834 | _updated(op); // success | |
835 | else if (r == -ECANCELED) { | |
f67539c2 | 836 | mon.no_reply(op); |
7c673cae FG |
837 | } else { |
838 | dispatch(op); // try again | |
839 | } | |
840 | })); | |
841 | ||
a4b75251 TL |
842 | return true; |
843 | ||
844 | evict: | |
845 | if (!mon.osdmon()->is_writeable()) { | |
846 | dout(1) << __func__ << ": waiting for writeable OSDMap to evict" << dendl; | |
847 | mon.osdmon()->wait_for_writeable(op, new C_RetryMessage(this, op)); | |
848 | return false; | |
849 | } | |
850 | ||
851 | fail_mds_gid(pending, gid); | |
852 | request_proposal(mon.osdmon()); | |
853 | dout(5) << __func__ << ": pending map now:" << dendl; | |
854 | print_map(pending); | |
855 | ||
856 | goto null; | |
857 | ||
858 | null: | |
859 | wait_for_finished_proposal(op, new LambdaContext([op, this](int r){ | |
860 | if (r >= 0) { | |
861 | auto m = make_message<MMDSMap>(mon.monmap->fsid, MDSMap::create_null_mdsmap()); | |
862 | mon.send_reply(op, m.detach()); | |
863 | } else { | |
864 | dispatch(op); // try again | |
865 | } | |
866 | })); | |
867 | ||
7c673cae FG |
868 | return true; |
869 | } | |
870 | ||
871 | bool MDSMonitor::prepare_offload_targets(MonOpRequestRef op) | |
872 | { | |
28e407b8 AA |
873 | auto &pending = get_pending_fsmap_writeable(); |
874 | ||
7c673cae | 875 | op->mark_mdsmon_event(__func__); |
9f95a23c | 876 | auto m = op->get_req<MMDSLoadTargets>(); |
7c673cae | 877 | mds_gid_t gid = m->global_id; |
28e407b8 | 878 | if (pending.gid_has_rank(gid)) { |
7c673cae | 879 | dout(10) << "prepare_offload_targets " << gid << " " << m->targets << dendl; |
28e407b8 | 880 | pending.update_export_targets(gid, m->targets); |
7c673cae FG |
881 | } else { |
882 | dout(10) << "prepare_offload_targets " << gid << " not in map" << dendl; | |
883 | } | |
f67539c2 | 884 | mon.no_reply(op); |
7c673cae FG |
885 | return true; |
886 | } | |
887 | ||
888 | bool MDSMonitor::should_propose(double& delay) | |
889 | { | |
890 | // delegate to PaxosService to assess whether we should propose | |
891 | return PaxosService::should_propose(delay); | |
892 | } | |
893 | ||
894 | void MDSMonitor::_updated(MonOpRequestRef op) | |
895 | { | |
28e407b8 | 896 | const auto &fsmap = get_fsmap(); |
7c673cae | 897 | op->mark_mdsmon_event(__func__); |
9f95a23c | 898 | auto m = op->get_req<MMDSBeacon>(); |
7c673cae | 899 | dout(10) << "_updated " << m->get_orig_source() << " " << *m << dendl; |
f67539c2 | 900 | mon.clog->debug() << m->get_orig_source() << " " |
11fdf7f2 TL |
901 | << m->get_orig_source_addrs() << " " |
902 | << ceph_mds_state_name(m->get_state()); | |
7c673cae FG |
903 | |
904 | if (m->get_state() == MDSMap::STATE_STOPPED) { | |
905 | // send the map manually (they're out of the map, so they won't get it automatic) | |
522d829b | 906 | auto m = make_message<MMDSMap>(mon.monmap->fsid, MDSMap::create_null_mdsmap()); |
f67539c2 | 907 | mon.send_reply(op, m.detach()); |
7c673cae | 908 | } else { |
f67539c2 | 909 | auto beacon = make_message<MMDSBeacon>(mon.monmap->fsid, |
11fdf7f2 TL |
910 | m->get_global_id(), m->get_name(), fsmap.get_epoch(), |
911 | m->get_state(), m->get_seq(), CEPH_FEATURES_SUPPORTED_DEFAULT); | |
f67539c2 | 912 | mon.send_reply(op, beacon.detach()); |
7c673cae FG |
913 | } |
914 | } | |
915 | ||
916 | void MDSMonitor::on_active() | |
917 | { | |
918 | tick(); | |
7c673cae | 919 | |
28e407b8 | 920 | if (is_leader()) { |
f67539c2 | 921 | mon.clog->debug() << "fsmap " << get_fsmap(); |
224ce89b | 922 | } |
7c673cae FG |
923 | } |
924 | ||
7c673cae FG |
925 | void MDSMonitor::dump_info(Formatter *f) |
926 | { | |
927 | f->open_object_section("fsmap"); | |
28e407b8 | 928 | get_fsmap().dump(f); |
7c673cae FG |
929 | f->close_section(); |
930 | ||
931 | f->dump_unsigned("mdsmap_first_committed", get_first_committed()); | |
932 | f->dump_unsigned("mdsmap_last_committed", get_last_committed()); | |
933 | } | |
934 | ||
935 | bool MDSMonitor::preprocess_command(MonOpRequestRef op) | |
936 | { | |
937 | op->mark_mdsmon_event(__func__); | |
9f95a23c | 938 | auto m = op->get_req<MMonCommand>(); |
7c673cae FG |
939 | int r = -1; |
940 | bufferlist rdata; | |
941 | stringstream ss, ds; | |
942 | ||
11fdf7f2 | 943 | cmdmap_t cmdmap; |
7c673cae FG |
944 | if (!cmdmap_from_json(m->cmd, &cmdmap, ss)) { |
945 | // ss has reason for failure | |
946 | string rs = ss.str(); | |
f67539c2 | 947 | mon.reply_command(op, -EINVAL, rs, rdata, get_last_committed()); |
7c673cae FG |
948 | return true; |
949 | } | |
950 | ||
951 | string prefix; | |
9f95a23c | 952 | cmd_getval(cmdmap, "prefix", prefix); |
20effc67 | 953 | string format = cmd_getval_or<string>(cmdmap, "format", "plain"); |
1adf2230 | 954 | std::unique_ptr<Formatter> f(Formatter::create(format)); |
7c673cae | 955 | |
11fdf7f2 | 956 | MonSession *session = op->get_session(); |
7c673cae | 957 | if (!session) { |
f67539c2 | 958 | mon.reply_command(op, -EACCES, "access denied", rdata, get_last_committed()); |
7c673cae FG |
959 | return true; |
960 | } | |
961 | ||
f67539c2 TL |
962 | // to use const qualifier filter fsmap beforehand |
963 | FSMap _fsmap_copy = get_fsmap(); | |
964 | _fsmap_copy.filter(session->get_allowed_fs_names()); | |
965 | const auto& fsmap = _fsmap_copy; | |
966 | ||
7c673cae FG |
967 | if (prefix == "mds stat") { |
968 | if (f) { | |
969 | f->open_object_section("mds_stat"); | |
970 | dump_info(f.get()); | |
971 | f->close_section(); | |
972 | f->flush(ds); | |
973 | } else { | |
974 | ds << fsmap; | |
975 | } | |
976 | r = 0; | |
11fdf7f2 TL |
977 | } else if (prefix == "mds ok-to-stop") { |
978 | vector<string> ids; | |
9f95a23c | 979 | if (!cmd_getval(cmdmap, "ids", ids)) { |
11fdf7f2 TL |
980 | r = -EINVAL; |
981 | ss << "must specify mds id"; | |
982 | goto out; | |
983 | } | |
984 | if (fsmap.is_any_degraded()) { | |
985 | ss << "one or more filesystems is currently degraded"; | |
986 | r = -EBUSY; | |
987 | goto out; | |
988 | } | |
989 | set<mds_gid_t> stopping; | |
990 | for (auto& id : ids) { | |
991 | ostringstream ess; | |
992 | mds_gid_t gid = gid_from_arg(fsmap, id, ess); | |
993 | if (gid == MDS_GID_NONE) { | |
994 | // the mds doesn't exist, but no file systems are unhappy, so losing it | |
995 | // can't have any effect. | |
996 | continue; | |
997 | } | |
998 | stopping.insert(gid); | |
999 | } | |
1000 | set<mds_gid_t> active; | |
1001 | set<mds_gid_t> standby; | |
1002 | for (auto gid : stopping) { | |
1003 | if (fsmap.gid_has_rank(gid)) { | |
1004 | // ignore standby-replay daemons (at this level) | |
1005 | if (!fsmap.is_standby_replay(gid)) { | |
1006 | auto standby = fsmap.get_standby_replay(gid); | |
1007 | if (standby == MDS_GID_NONE || | |
1008 | stopping.count(standby)) { | |
1009 | // no standby-replay, or we're also stopping the standby-replay | |
1010 | // for this mds | |
1011 | active.insert(gid); | |
1012 | } | |
1013 | } | |
7c673cae | 1014 | } else { |
11fdf7f2 TL |
1015 | // net loss of a standby |
1016 | standby.insert(gid); | |
7c673cae FG |
1017 | } |
1018 | } | |
11fdf7f2 TL |
1019 | if (fsmap.get_num_standby() - standby.size() < active.size()) { |
1020 | r = -EBUSY; | |
1021 | ss << "insufficent standby MDS daemons to stop active gids " | |
1022 | << stringify(active) | |
1023 | << " and/or standby gids " << stringify(standby);; | |
1024 | goto out; | |
28e407b8 | 1025 | } |
11fdf7f2 TL |
1026 | r = 0; |
1027 | ss << "should be safe to stop " << ids; | |
7c673cae FG |
1028 | } else if (prefix == "fs dump") { |
1029 | int64_t epocharg; | |
1030 | epoch_t epoch; | |
1031 | ||
1adf2230 | 1032 | const FSMap *fsmapp = &fsmap; |
28e407b8 | 1033 | FSMap dummy; |
9f95a23c | 1034 | if (cmd_getval(cmdmap, "epoch", epocharg)) { |
7c673cae FG |
1035 | epoch = epocharg; |
1036 | bufferlist b; | |
1037 | int err = get_version(epoch, b); | |
1038 | if (err == -ENOENT) { | |
7c673cae | 1039 | r = -ENOENT; |
28e407b8 | 1040 | goto out; |
7c673cae | 1041 | } else { |
11fdf7f2 TL |
1042 | ceph_assert(err == 0); |
1043 | ceph_assert(b.length()); | |
28e407b8 AA |
1044 | dummy.decode(b); |
1045 | fsmapp = &dummy; | |
7c673cae FG |
1046 | } |
1047 | } | |
c07f9fc5 | 1048 | |
28e407b8 AA |
1049 | stringstream ds; |
1050 | if (f != NULL) { | |
1051 | f->open_object_section("fsmap"); | |
1052 | fsmapp->dump(f.get()); | |
1053 | f->close_section(); | |
1054 | f->flush(ds); | |
1055 | r = 0; | |
1056 | } else { | |
1057 | fsmapp->print(ds); | |
1058 | r = 0; | |
7c673cae | 1059 | } |
28e407b8 AA |
1060 | |
1061 | rdata.append(ds); | |
1062 | ss << "dumped fsmap epoch " << fsmapp->get_epoch(); | |
7c673cae FG |
1063 | } else if (prefix == "mds metadata") { |
1064 | if (!f) | |
1065 | f.reset(Formatter::create("json-pretty")); | |
1066 | ||
1067 | string who; | |
9f95a23c | 1068 | bool all = !cmd_getval(cmdmap, "who", who); |
7c673cae FG |
1069 | dout(1) << "all = " << all << dendl; |
1070 | if (all) { | |
1071 | r = 0; | |
1072 | // Dump all MDSs' metadata | |
1073 | const auto all_info = fsmap.get_mds_info(); | |
1074 | ||
1075 | f->open_array_section("mds_metadata"); | |
1076 | for(const auto &i : all_info) { | |
1077 | const auto &info = i.second; | |
1078 | ||
1079 | f->open_object_section("mds"); | |
1080 | f->dump_string("name", info.name); | |
1081 | std::ostringstream get_err; | |
1adf2230 | 1082 | r = dump_metadata(fsmap, info.name, f.get(), get_err); |
7c673cae FG |
1083 | if (r == -EINVAL || r == -ENOENT) { |
1084 | // Drop error, list what metadata we do have | |
1085 | dout(1) << get_err.str() << dendl; | |
1086 | r = 0; | |
1087 | } else if (r != 0) { | |
1088 | derr << "Unexpected error reading metadata: " << cpp_strerror(r) | |
1089 | << dendl; | |
1090 | ss << get_err.str(); | |
c07f9fc5 | 1091 | f->close_section(); |
7c673cae FG |
1092 | break; |
1093 | } | |
1094 | f->close_section(); | |
1095 | } | |
1096 | f->close_section(); | |
1097 | } else { | |
1098 | // Dump a single daemon's metadata | |
1099 | f->open_object_section("mds_metadata"); | |
1adf2230 | 1100 | r = dump_metadata(fsmap, who, f.get(), ss); |
7c673cae FG |
1101 | f->close_section(); |
1102 | } | |
1103 | f->flush(ds); | |
31f18b77 FG |
1104 | } else if (prefix == "mds versions") { |
1105 | if (!f) | |
1106 | f.reset(Formatter::create("json-pretty")); | |
1107 | count_metadata("ceph_version", f.get()); | |
1108 | f->flush(ds); | |
1109 | r = 0; | |
1110 | } else if (prefix == "mds count-metadata") { | |
1111 | if (!f) | |
1112 | f.reset(Formatter::create("json-pretty")); | |
1113 | string field; | |
9f95a23c | 1114 | cmd_getval(cmdmap, "property", field); |
31f18b77 FG |
1115 | count_metadata(field, f.get()); |
1116 | f->flush(ds); | |
1117 | r = 0; | |
522d829b TL |
1118 | } else if (prefix == "fs compat show") { |
1119 | string fs_name; | |
1120 | cmd_getval(cmdmap, "fs_name", fs_name); | |
1121 | const auto &fs = fsmap.get_filesystem(fs_name); | |
1122 | if (fs == nullptr) { | |
1123 | ss << "filesystem '" << fs_name << "' not found"; | |
1124 | r = -ENOENT; | |
1125 | goto out; | |
1126 | } | |
1127 | ||
1128 | if (f) { | |
1129 | f->open_object_section("mds_compat"); | |
1130 | fs->mds_map.compat.dump(f.get()); | |
1131 | f->close_section(); | |
1132 | f->flush(ds); | |
1133 | } else { | |
1134 | ds << fs->mds_map.compat; | |
1135 | } | |
1136 | r = 0; | |
7c673cae FG |
1137 | } else if (prefix == "mds compat show") { |
1138 | if (f) { | |
1139 | f->open_object_section("mds_compat"); | |
522d829b | 1140 | fsmap.default_compat.dump(f.get()); |
7c673cae FG |
1141 | f->close_section(); |
1142 | f->flush(ds); | |
1143 | } else { | |
522d829b | 1144 | ds << fsmap.default_compat; |
7c673cae FG |
1145 | } |
1146 | r = 0; | |
1147 | } else if (prefix == "fs get") { | |
1148 | string fs_name; | |
9f95a23c | 1149 | cmd_getval(cmdmap, "fs_name", fs_name); |
28e407b8 | 1150 | const auto &fs = fsmap.get_filesystem(fs_name); |
7c673cae FG |
1151 | if (fs == nullptr) { |
1152 | ss << "filesystem '" << fs_name << "' not found"; | |
1153 | r = -ENOENT; | |
1154 | } else { | |
1155 | if (f != nullptr) { | |
1156 | f->open_object_section("filesystem"); | |
1157 | fs->dump(f.get()); | |
1158 | f->close_section(); | |
1159 | f->flush(ds); | |
1160 | r = 0; | |
1161 | } else { | |
1162 | fs->print(ds); | |
1163 | r = 0; | |
1164 | } | |
1165 | } | |
1166 | } else if (prefix == "fs ls") { | |
1167 | if (f) { | |
1168 | f->open_array_section("filesystems"); | |
1adf2230 AA |
1169 | for (const auto &p : fsmap.filesystems) { |
1170 | const auto &fs = p.second; | |
1171 | f->open_object_section("filesystem"); | |
1172 | { | |
1173 | const MDSMap &mds_map = fs->mds_map; | |
1174 | f->dump_string("name", mds_map.fs_name); | |
1175 | /* Output both the names and IDs of pools, for use by | |
1176 | * humans and machines respectively */ | |
f67539c2 | 1177 | f->dump_string("metadata_pool", mon.osdmon()->osdmap.get_pool_name( |
1adf2230 AA |
1178 | mds_map.metadata_pool)); |
1179 | f->dump_int("metadata_pool_id", mds_map.metadata_pool); | |
1180 | f->open_array_section("data_pool_ids"); | |
1181 | for (const auto &id : mds_map.data_pools) { | |
1182 | f->dump_int("data_pool_id", id); | |
1183 | } | |
1184 | f->close_section(); | |
7c673cae | 1185 | |
1adf2230 AA |
1186 | f->open_array_section("data_pools"); |
1187 | for (const auto &id : mds_map.data_pools) { | |
f67539c2 | 1188 | const auto &name = mon.osdmon()->osdmap.get_pool_name(id); |
1adf2230 | 1189 | f->dump_string("data_pool", name); |
7c673cae FG |
1190 | } |
1191 | f->close_section(); | |
1192 | } | |
1adf2230 | 1193 | f->close_section(); |
7c673cae FG |
1194 | } |
1195 | f->close_section(); | |
1196 | f->flush(ds); | |
1197 | } else { | |
28e407b8 AA |
1198 | for (const auto &p : fsmap.filesystems) { |
1199 | const auto &fs = p.second; | |
7c673cae | 1200 | const MDSMap &mds_map = fs->mds_map; |
f67539c2 | 1201 | const string &md_pool_name = mon.osdmon()->osdmap.get_pool_name( |
7c673cae FG |
1202 | mds_map.metadata_pool); |
1203 | ||
1204 | ds << "name: " << mds_map.fs_name << ", metadata pool: " | |
1205 | << md_pool_name << ", data pools: ["; | |
1adf2230 | 1206 | for (const auto &id : mds_map.data_pools) { |
f67539c2 | 1207 | const string &pool_name = mon.osdmon()->osdmap.get_pool_name(id); |
7c673cae FG |
1208 | ds << pool_name << " "; |
1209 | } | |
1210 | ds << "]" << std::endl; | |
1211 | } | |
1212 | ||
1213 | if (fsmap.filesystems.empty()) { | |
1214 | ds << "No filesystems enabled" << std::endl; | |
1215 | } | |
1216 | } | |
1217 | r = 0; | |
f67539c2 TL |
1218 | } else if (prefix == "fs feature ls") { |
1219 | if (f) { | |
1220 | f->open_array_section("cephfs_features"); | |
1221 | for (size_t i = 0; i <= CEPHFS_FEATURE_MAX; ++i) { | |
1222 | f->open_object_section("feature"); | |
1223 | f->dump_int("index", i); | |
1224 | f->dump_string("name", cephfs_feature_name(i)); | |
1225 | f->close_section(); | |
1226 | } | |
1227 | f->close_section(); | |
1228 | f->flush(ds); | |
1229 | } else { | |
1230 | for (size_t i = 0; i <= CEPHFS_FEATURE_MAX; ++i) { | |
1231 | ds << i << " " << cephfs_feature_name(i) << std::endl; | |
1232 | } | |
1233 | } | |
1234 | r = 0; | |
20effc67 TL |
1235 | } else if (prefix == "fs lsflags") { |
1236 | string fs_name; | |
1237 | cmd_getval(cmdmap, "fs_name", fs_name); | |
1238 | const auto &fs = fsmap.get_filesystem(fs_name); | |
1239 | if (!fs) { | |
1240 | ss << "filesystem '" << fs_name << "' not found"; | |
1241 | r = -ENOENT; | |
1242 | } else { | |
1243 | const MDSMap &mds_map = fs->mds_map; | |
1244 | if (f) { | |
1245 | mds_map.dump_flags_state(f.get()); | |
1246 | f->flush(ds); | |
1247 | } | |
1248 | else { | |
1249 | mds_map.print_flags(ds); | |
1250 | } | |
1251 | r = 0; | |
1252 | } | |
7c673cae FG |
1253 | } |
1254 | ||
28e407b8 | 1255 | out: |
7c673cae FG |
1256 | if (r != -1) { |
1257 | rdata.append(ds); | |
1258 | string rs; | |
1259 | getline(ss, rs); | |
f67539c2 | 1260 | mon.reply_command(op, r, rs, rdata, get_last_committed()); |
7c673cae FG |
1261 | return true; |
1262 | } else | |
1263 | return false; | |
1264 | } | |
1265 | ||
1adf2230 | 1266 | bool MDSMonitor::fail_mds_gid(FSMap &fsmap, mds_gid_t gid) |
7c673cae | 1267 | { |
9f95a23c | 1268 | const auto& info = fsmap.get_info_gid(gid); |
91327a77 | 1269 | dout(1) << "fail_mds_gid " << gid << " mds." << info.name << " role " << info.rank << dendl; |
7c673cae | 1270 | |
f67539c2 | 1271 | ceph_assert(mon.osdmon()->is_writeable()); |
a8e16298 | 1272 | |
f67539c2 | 1273 | epoch_t blocklist_epoch = 0; |
7c673cae FG |
1274 | if (info.rank >= 0 && info.state != MDSMap::STATE_STANDBY_REPLAY) { |
1275 | utime_t until = ceph_clock_now(); | |
f67539c2 TL |
1276 | until += g_conf().get_val<double>("mon_mds_blocklist_interval"); |
1277 | blocklist_epoch = mon.osdmon()->blocklist(info.addrs, until); | |
7c673cae FG |
1278 | } |
1279 | ||
f67539c2 | 1280 | fsmap.erase(gid, blocklist_epoch); |
7c673cae FG |
1281 | last_beacon.erase(gid); |
1282 | if (pending_daemon_health.count(gid)) { | |
1283 | pending_daemon_health.erase(gid); | |
1284 | pending_daemon_health_rm.insert(gid); | |
1285 | } | |
1286 | ||
f67539c2 | 1287 | return blocklist_epoch != 0; |
7c673cae FG |
1288 | } |
1289 | ||
1adf2230 | 1290 | mds_gid_t MDSMonitor::gid_from_arg(const FSMap &fsmap, const std::string &arg, std::ostream &ss) |
7c673cae FG |
1291 | { |
1292 | // Try parsing as a role | |
1293 | mds_role_t role; | |
1294 | std::ostringstream ignore_err; // Don't spam 'ss' with parse_role errors | |
1adf2230 | 1295 | int r = fsmap.parse_role(arg, &role, ignore_err); |
7c673cae FG |
1296 | if (r == 0) { |
1297 | // See if a GID is assigned to this role | |
28e407b8 | 1298 | const auto &fs = fsmap.get_filesystem(role.fscid); |
11fdf7f2 | 1299 | ceph_assert(fs != nullptr); // parse_role ensures it exists |
7c673cae FG |
1300 | if (fs->mds_map.is_up(role.rank)) { |
1301 | dout(10) << __func__ << ": validated rank/GID " << role | |
1302 | << " as a rank" << dendl; | |
1303 | return fs->mds_map.get_mds_info(role.rank).global_id; | |
1304 | } | |
1305 | } | |
1306 | ||
1307 | // Try parsing as a gid | |
1308 | std::string err; | |
1309 | unsigned long long maybe_gid = strict_strtoll(arg.c_str(), 10, &err); | |
1310 | if (!err.empty()) { | |
1311 | // Not a role or a GID, try as a daemon name | |
28e407b8 | 1312 | const MDSMap::mds_info_t *mds_info = fsmap.find_by_name(arg); |
7c673cae FG |
1313 | if (!mds_info) { |
1314 | ss << "MDS named '" << arg | |
1315 | << "' does not exist, or is not up"; | |
1316 | return MDS_GID_NONE; | |
1317 | } | |
1318 | dout(10) << __func__ << ": resolved MDS name '" << arg | |
1319 | << "' to GID " << mds_info->global_id << dendl; | |
1320 | return mds_info->global_id; | |
1321 | } else { | |
1322 | // Not a role, but parses as a an integer, might be a GID | |
1323 | dout(10) << __func__ << ": treating MDS reference '" << arg | |
1324 | << "' as an integer " << maybe_gid << dendl; | |
31f18b77 | 1325 | |
28e407b8 | 1326 | if (fsmap.gid_exists(mds_gid_t(maybe_gid))) { |
31f18b77 | 1327 | return mds_gid_t(maybe_gid); |
7c673cae FG |
1328 | } |
1329 | } | |
1330 | ||
1331 | dout(1) << __func__ << ": rank/GID " << arg | |
1332 | << " not a existent rank or GID" << dendl; | |
1333 | return MDS_GID_NONE; | |
1334 | } | |
1335 | ||
1adf2230 AA |
1336 | int MDSMonitor::fail_mds(FSMap &fsmap, std::ostream &ss, |
1337 | const std::string &arg, MDSMap::mds_info_t *failed_info) | |
7c673cae | 1338 | { |
11fdf7f2 | 1339 | ceph_assert(failed_info != nullptr); |
d2e6a577 | 1340 | |
1adf2230 | 1341 | mds_gid_t gid = gid_from_arg(fsmap, arg, ss); |
7c673cae FG |
1342 | if (gid == MDS_GID_NONE) { |
1343 | return 0; | |
1344 | } | |
f67539c2 | 1345 | if (!mon.osdmon()->is_writeable()) { |
7c673cae FG |
1346 | return -EAGAIN; |
1347 | } | |
d2e6a577 FG |
1348 | |
1349 | // Take a copy of the info before removing the MDS from the map, | |
1350 | // so that the caller knows which mds (if any) they ended up removing. | |
1adf2230 | 1351 | *failed_info = fsmap.get_info_gid(gid); |
d2e6a577 | 1352 | |
1adf2230 | 1353 | fail_mds_gid(fsmap, gid); |
7c673cae | 1354 | ss << "failed mds gid " << gid; |
f67539c2 TL |
1355 | ceph_assert(mon.osdmon()->is_writeable()); |
1356 | request_proposal(mon.osdmon()); | |
7c673cae FG |
1357 | return 0; |
1358 | } | |
1359 | ||
1360 | bool MDSMonitor::prepare_command(MonOpRequestRef op) | |
1361 | { | |
1362 | op->mark_mdsmon_event(__func__); | |
9f95a23c | 1363 | auto m = op->get_req<MMonCommand>(); |
7c673cae FG |
1364 | int r = -EINVAL; |
1365 | stringstream ss; | |
1366 | bufferlist rdata; | |
1367 | ||
11fdf7f2 | 1368 | cmdmap_t cmdmap; |
7c673cae FG |
1369 | if (!cmdmap_from_json(m->cmd, &cmdmap, ss)) { |
1370 | string rs = ss.str(); | |
f67539c2 | 1371 | mon.reply_command(op, -EINVAL, rs, rdata, get_last_committed()); |
7c673cae FG |
1372 | return true; |
1373 | } | |
1374 | ||
1375 | string prefix; | |
9f95a23c | 1376 | cmd_getval(cmdmap, "prefix", prefix); |
7c673cae FG |
1377 | |
1378 | /* Refuse access if message not associated with a valid session */ | |
11fdf7f2 | 1379 | MonSession *session = op->get_session(); |
7c673cae | 1380 | if (!session) { |
f67539c2 | 1381 | mon.reply_command(op, -EACCES, "access denied", rdata, get_last_committed()); |
7c673cae FG |
1382 | return true; |
1383 | } | |
1384 | ||
28e407b8 AA |
1385 | auto &pending = get_pending_fsmap_writeable(); |
1386 | ||
c07f9fc5 | 1387 | bool batched_propose = false; |
28e407b8 | 1388 | for (const auto &h : handlers) { |
f67539c2 TL |
1389 | r = h->can_handle(prefix, op, pending, cmdmap, ss); |
1390 | if (r == 1) { | |
1391 | ; // pass, since we got the right handler. | |
1392 | } else if (r == 0) { | |
1393 | continue; | |
1394 | } else { | |
1395 | goto out; | |
1396 | } | |
c07f9fc5 | 1397 | |
f67539c2 TL |
1398 | batched_propose = h->batched_propose(); |
1399 | if (batched_propose) { | |
1400 | paxos.plug(); | |
1401 | } | |
1402 | r = h->handle(&mon, pending, op, cmdmap, ss); | |
1403 | if (batched_propose) { | |
1404 | paxos.unplug(); | |
1405 | } | |
1406 | ||
1407 | if (r == -EAGAIN) { | |
1408 | // message has been enqueued for retry; return. | |
1409 | dout(4) << __func__ << " enqueue for retry by prepare_command" << dendl; | |
1410 | return false; | |
1411 | } else { | |
1412 | if (r == 0) { | |
1413 | // On successful updates, print the updated map | |
1414 | print_map(pending); | |
7c673cae | 1415 | } |
f67539c2 TL |
1416 | // Successful or not, we're done: respond. |
1417 | goto out; | |
7c673cae FG |
1418 | } |
1419 | } | |
1420 | ||
1adf2230 | 1421 | r = filesystem_command(pending, op, prefix, cmdmap, ss); |
7c673cae FG |
1422 | if (r >= 0) { |
1423 | goto out; | |
1424 | } else if (r == -EAGAIN) { | |
1425 | // Do not reply, the message has been enqueued for retry | |
1426 | dout(4) << __func__ << " enqueue for retry by filesystem_command" << dendl; | |
1427 | return false; | |
1428 | } else if (r != -ENOSYS) { | |
1429 | goto out; | |
1430 | } | |
1431 | ||
7c673cae FG |
1432 | if (r == -ENOSYS && ss.str().empty()) { |
1433 | ss << "unrecognized command"; | |
1434 | } | |
1435 | ||
1436 | out: | |
1437 | dout(4) << __func__ << " done, r=" << r << dendl; | |
1438 | /* Compose response */ | |
1439 | string rs; | |
1440 | getline(ss, rs); | |
1441 | ||
1442 | if (r >= 0) { | |
1443 | // success.. delay reply | |
1444 | wait_for_finished_proposal(op, new Monitor::C_Command(mon, op, r, rs, | |
1445 | get_last_committed() + 1)); | |
c07f9fc5 FG |
1446 | if (batched_propose) { |
1447 | force_immediate_propose(); | |
1448 | } | |
7c673cae FG |
1449 | return true; |
1450 | } else { | |
1451 | // reply immediately | |
f67539c2 | 1452 | mon.reply_command(op, r, rs, rdata, get_last_committed()); |
7c673cae FG |
1453 | return false; |
1454 | } | |
1455 | } | |
1456 | ||
7c673cae | 1457 | int MDSMonitor::filesystem_command( |
1adf2230 | 1458 | FSMap &fsmap, |
7c673cae FG |
1459 | MonOpRequestRef op, |
1460 | std::string const &prefix, | |
11fdf7f2 | 1461 | const cmdmap_t& cmdmap, |
7c673cae FG |
1462 | std::stringstream &ss) |
1463 | { | |
1464 | dout(4) << __func__ << " prefix='" << prefix << "'" << dendl; | |
1465 | op->mark_mdsmon_event(__func__); | |
1466 | int r = 0; | |
1467 | string whostr; | |
9f95a23c | 1468 | cmd_getval(cmdmap, "role", whostr); |
7c673cae | 1469 | |
11fdf7f2 | 1470 | if (prefix == "mds set_state") { |
7c673cae | 1471 | mds_gid_t gid; |
9f95a23c | 1472 | if (!cmd_getval(cmdmap, "gid", gid)) { |
7c673cae | 1473 | ss << "error parsing 'gid' value '" |
11fdf7f2 | 1474 | << cmd_vartype_stringify(cmdmap.at("gid")) << "'"; |
7c673cae FG |
1475 | return -EINVAL; |
1476 | } | |
1477 | MDSMap::DaemonState state; | |
9f95a23c | 1478 | if (!cmd_getval(cmdmap, "state", state)) { |
7c673cae | 1479 | ss << "error parsing 'state' string value '" |
11fdf7f2 | 1480 | << cmd_vartype_stringify(cmdmap.at("state")) << "'"; |
7c673cae FG |
1481 | return -EINVAL; |
1482 | } | |
f67539c2 | 1483 | if (fsmap.gid_exists(gid, op->get_session()->get_allowed_fs_names())) { |
11fdf7f2 TL |
1484 | fsmap.modify_daemon(gid, [state](auto& info) { |
1485 | info.state = state; | |
7c673cae FG |
1486 | }); |
1487 | ss << "set mds gid " << gid << " to state " << state << " " | |
1488 | << ceph_mds_state_name(state); | |
1489 | return 0; | |
1490 | } | |
1491 | } else if (prefix == "mds fail") { | |
1492 | string who; | |
9f95a23c | 1493 | cmd_getval(cmdmap, "role_or_gid", who); |
d2e6a577 FG |
1494 | |
1495 | MDSMap::mds_info_t failed_info; | |
f67539c2 TL |
1496 | mds_gid_t gid = gid_from_arg(fsmap, who, ss); |
1497 | if (gid == MDS_GID_NONE) { | |
1498 | ss << "MDS named '" << who << "' does not exist, is not up or you " | |
1499 | << "lack the permission to see."; | |
1500 | return 0; | |
1501 | } | |
1502 | if(!fsmap.gid_exists(gid, op->get_session()->get_allowed_fs_names())) { | |
1503 | ss << "MDS named '" << who << "' does not exist, is not up or you " | |
1504 | << "lack the permission to see."; | |
1505 | return -EINVAL; | |
1506 | } | |
1507 | string_view fs_name = fsmap.fs_name_from_gid(gid); | |
1508 | if (!op->get_session()->fs_name_capable(fs_name, MON_CAP_W)) { | |
1509 | ss << "Permission denied."; | |
1510 | return -EPERM; | |
1511 | } | |
1512 | ||
1adf2230 | 1513 | r = fail_mds(fsmap, ss, who, &failed_info); |
7c673cae | 1514 | if (r < 0 && r == -EAGAIN) { |
f67539c2 | 1515 | mon.osdmon()->wait_for_writeable(op, new C_RetryMessage(this, op)); |
7c673cae | 1516 | return -EAGAIN; // don't propose yet; wait for message to be retried |
d2e6a577 FG |
1517 | } else if (r == 0) { |
1518 | // Only log if we really did something (not when was already gone) | |
1519 | if (failed_info.global_id != MDS_GID_NONE) { | |
f67539c2 | 1520 | mon.clog->info() << failed_info.human_name() << " marked failed by " |
d2e6a577 FG |
1521 | << op->get_session()->entity_name; |
1522 | } | |
7c673cae FG |
1523 | } |
1524 | } else if (prefix == "mds rm") { | |
1525 | mds_gid_t gid; | |
9f95a23c | 1526 | if (!cmd_getval(cmdmap, "gid", gid)) { |
7c673cae | 1527 | ss << "error parsing 'gid' value '" |
11fdf7f2 | 1528 | << cmd_vartype_stringify(cmdmap.at("gid")) << "'"; |
7c673cae FG |
1529 | return -EINVAL; |
1530 | } | |
f67539c2 | 1531 | if (!fsmap.gid_exists(gid, op->get_session()->get_allowed_fs_names())) { |
11fdf7f2 | 1532 | ss << "mds gid " << gid << " does not exist"; |
f67539c2 TL |
1533 | return 0; |
1534 | } | |
1535 | string_view fs_name = fsmap.fs_name_from_gid(gid); | |
1536 | if (!op->get_session()->fs_name_capable(fs_name, MON_CAP_W)) { | |
1537 | ss << "Permission denied."; | |
1538 | return -EPERM; | |
1539 | } | |
1540 | const auto &info = fsmap.get_info_gid(gid); | |
1541 | MDSMap::DaemonState state = info.state; | |
1542 | if (state > 0) { | |
1543 | ss << "cannot remove active mds." << info.name | |
1544 | << " rank " << info.rank; | |
1545 | return -EBUSY; | |
7c673cae | 1546 | } else { |
f67539c2 TL |
1547 | fsmap.erase(gid, {}); |
1548 | ss << "removed mds gid " << gid; | |
1549 | return 0; | |
7c673cae FG |
1550 | } |
1551 | } else if (prefix == "mds rmfailed") { | |
11fdf7f2 | 1552 | bool confirm = false; |
9f95a23c | 1553 | cmd_getval(cmdmap, "yes_i_really_mean_it", confirm); |
11fdf7f2 | 1554 | if (!confirm) { |
7c673cae FG |
1555 | ss << "WARNING: this can make your filesystem inaccessible! " |
1556 | "Add --yes-i-really-mean-it if you are sure you wish to continue."; | |
1557 | return -EPERM; | |
1558 | } | |
1559 | ||
1560 | std::string role_str; | |
9f95a23c | 1561 | cmd_getval(cmdmap, "role", role_str); |
7c673cae | 1562 | mds_role_t role; |
f67539c2 TL |
1563 | const auto fs_names = op->get_session()->get_allowed_fs_names(); |
1564 | int r = fsmap.parse_role(role_str, &role, ss, fs_names); | |
7c673cae FG |
1565 | if (r < 0) { |
1566 | ss << "invalid role '" << role_str << "'"; | |
1567 | return -EINVAL; | |
1568 | } | |
f67539c2 TL |
1569 | string_view fs_name = fsmap.get_filesystem(role.fscid)->mds_map.get_fs_name(); |
1570 | if (!op->get_session()->fs_name_capable(fs_name, MON_CAP_W)) { | |
1571 | ss << "Permission denied."; | |
1572 | return -EPERM; | |
1573 | } | |
7c673cae | 1574 | |
1adf2230 | 1575 | fsmap.modify_filesystem( |
7c673cae FG |
1576 | role.fscid, |
1577 | [role](std::shared_ptr<Filesystem> fs) | |
1578 | { | |
1579 | fs->mds_map.failed.erase(role.rank); | |
1580 | }); | |
1581 | ||
1582 | ss << "removed failed mds." << role; | |
1583 | return 0; | |
522d829b | 1584 | /* TODO: convert to fs commands to update defaults */ |
7c673cae FG |
1585 | } else if (prefix == "mds compat rm_compat") { |
1586 | int64_t f; | |
9f95a23c | 1587 | if (!cmd_getval(cmdmap, "feature", f)) { |
7c673cae | 1588 | ss << "error parsing feature value '" |
11fdf7f2 | 1589 | << cmd_vartype_stringify(cmdmap.at("feature")) << "'"; |
7c673cae FG |
1590 | return -EINVAL; |
1591 | } | |
522d829b | 1592 | if (fsmap.default_compat.compat.contains(f)) { |
7c673cae | 1593 | ss << "removing compat feature " << f; |
522d829b | 1594 | fsmap.default_compat.compat.remove(f); |
7c673cae | 1595 | } else { |
522d829b | 1596 | ss << "compat feature " << f << " not present in " << fsmap.default_compat; |
7c673cae FG |
1597 | } |
1598 | r = 0; | |
1599 | } else if (prefix == "mds compat rm_incompat") { | |
1600 | int64_t f; | |
9f95a23c | 1601 | if (!cmd_getval(cmdmap, "feature", f)) { |
7c673cae | 1602 | ss << "error parsing feature value '" |
11fdf7f2 | 1603 | << cmd_vartype_stringify(cmdmap.at("feature")) << "'"; |
7c673cae FG |
1604 | return -EINVAL; |
1605 | } | |
522d829b | 1606 | if (fsmap.default_compat.incompat.contains(f)) { |
7c673cae | 1607 | ss << "removing incompat feature " << f; |
522d829b | 1608 | fsmap.default_compat.incompat.remove(f); |
7c673cae | 1609 | } else { |
522d829b | 1610 | ss << "incompat feature " << f << " not present in " << fsmap.default_compat; |
7c673cae FG |
1611 | } |
1612 | r = 0; | |
1613 | } else if (prefix == "mds repaired") { | |
1614 | std::string role_str; | |
9f95a23c | 1615 | cmd_getval(cmdmap, "role", role_str); |
7c673cae | 1616 | mds_role_t role; |
f67539c2 TL |
1617 | const auto fs_names = op->get_session()->get_allowed_fs_names(); |
1618 | r = fsmap.parse_role(role_str, &role, ss, fs_names); | |
7c673cae FG |
1619 | if (r < 0) { |
1620 | return r; | |
1621 | } | |
f67539c2 TL |
1622 | string_view fs_name = fsmap.get_filesystem(role.fscid)->mds_map.get_fs_name(); |
1623 | if (!op->get_session()->fs_name_capable(fs_name, MON_CAP_W)) { | |
1624 | ss << "Permission denied."; | |
1625 | return -EPERM; | |
1626 | } | |
7c673cae | 1627 | |
1adf2230 | 1628 | bool modified = fsmap.undamaged(role.fscid, role.rank); |
7c673cae | 1629 | if (modified) { |
494da23a | 1630 | ss << "repaired: restoring rank " << role; |
7c673cae | 1631 | } else { |
494da23a | 1632 | ss << "nothing to do: rank is not damaged"; |
7c673cae FG |
1633 | } |
1634 | ||
1635 | r = 0; | |
11fdf7f2 TL |
1636 | } else if (prefix == "mds freeze") { |
1637 | std::string who; | |
9f95a23c | 1638 | cmd_getval(cmdmap, "role_or_gid", who); |
11fdf7f2 TL |
1639 | mds_gid_t gid = gid_from_arg(fsmap, who, ss); |
1640 | if (gid == MDS_GID_NONE) { | |
7c673cae FG |
1641 | return -EINVAL; |
1642 | } | |
1643 | ||
f67539c2 TL |
1644 | string_view fs_name = fsmap.fs_name_from_gid(gid); |
1645 | if (!op->get_session()->fs_name_capable(fs_name, MON_CAP_W)) { | |
1646 | ss << "Permission denied."; | |
1647 | return -EPERM; | |
1648 | } | |
1649 | ||
11fdf7f2 | 1650 | bool freeze = false; |
7c673cae | 1651 | { |
11fdf7f2 | 1652 | std::string str; |
9f95a23c | 1653 | cmd_getval(cmdmap, "val", str); |
11fdf7f2 TL |
1654 | if ((r = parse_bool(str, &freeze, ss)) != 0) { |
1655 | return r; | |
1656 | } | |
1657 | } | |
7c673cae | 1658 | |
11fdf7f2 TL |
1659 | auto f = [freeze,gid,&ss](auto& info) { |
1660 | if (freeze) { | |
1661 | ss << "freezing mds." << gid; | |
1662 | info.freeze(); | |
1663 | } else { | |
1664 | ss << "unfreezing mds." << gid; | |
1665 | info.unfreeze(); | |
1666 | } | |
1667 | }; | |
1668 | fsmap.modify_daemon(gid, f); | |
7c673cae FG |
1669 | r = 0; |
1670 | } else { | |
1671 | return -ENOSYS; | |
1672 | } | |
1673 | ||
1674 | return r; | |
1675 | } | |
1676 | ||
7c673cae FG |
1677 | void MDSMonitor::check_subs() |
1678 | { | |
7c673cae FG |
1679 | // Subscriptions may be to "mdsmap" (MDS and legacy clients), |
1680 | // "mdsmap.<namespace>", or to "fsmap" for the full state of all | |
1681 | // filesystems. Build a list of all the types we service | |
1682 | // subscriptions for. | |
9f95a23c TL |
1683 | |
1684 | std::vector<std::string> types = { | |
1685 | "fsmap", | |
1686 | "fsmap.user", | |
1687 | "mdsmap", | |
1688 | }; | |
1689 | ||
28e407b8 AA |
1690 | for (const auto &p : get_fsmap().filesystems) { |
1691 | const auto &fscid = p.first; | |
9f95a23c TL |
1692 | CachedStackStringStream cos; |
1693 | *cos << "mdsmap." << fscid; | |
1694 | types.push_back(std::string(cos->strv())); | |
7c673cae FG |
1695 | } |
1696 | ||
1697 | for (const auto &type : types) { | |
f67539c2 | 1698 | auto& subs = mon.session_map.subs; |
9f95a23c TL |
1699 | auto subs_it = subs.find(type); |
1700 | if (subs_it == subs.end()) | |
7c673cae | 1701 | continue; |
9f95a23c TL |
1702 | auto sub_it = subs_it->second->begin(); |
1703 | while (!sub_it.end()) { | |
1704 | auto sub = *sub_it; | |
1705 | ++sub_it; // N.B. check_sub may remove sub! | |
7c673cae FG |
1706 | check_sub(sub); |
1707 | } | |
1708 | } | |
1709 | } | |
1710 | ||
1711 | ||
1712 | void MDSMonitor::check_sub(Subscription *sub) | |
1713 | { | |
1714 | dout(20) << __func__ << ": " << sub->type << dendl; | |
1715 | ||
f67539c2 TL |
1716 | // to use const qualifier filter fsmap beforehand |
1717 | FSMap _fsmap_copy = get_fsmap(); | |
1718 | _fsmap_copy.filter(sub->session->get_allowed_fs_names()); | |
1719 | const auto& fsmap = _fsmap_copy; | |
1720 | if (sub->next > fsmap.get_epoch()) { | |
1721 | return; | |
1722 | } | |
28e407b8 | 1723 | |
7c673cae | 1724 | if (sub->type == "fsmap") { |
f67539c2 TL |
1725 | sub->session->con->send_message(new MFSMap(mon.monmap->fsid, fsmap)); |
1726 | if (sub->onetime) { | |
1727 | mon.session_map.remove_sub(sub); | |
1728 | } else { | |
1729 | sub->next = fsmap.get_epoch() + 1; | |
7c673cae FG |
1730 | } |
1731 | } else if (sub->type == "fsmap.user") { | |
f67539c2 TL |
1732 | FSMapUser fsmap_u; |
1733 | fsmap_u.epoch = fsmap.get_epoch(); | |
1734 | fsmap_u.legacy_client_fscid = fsmap.legacy_client_fscid; | |
1735 | for (const auto &p : fsmap.filesystems) { | |
1736 | FSMapUser::fs_info_t& fs_info = fsmap_u.filesystems[p.second->fscid]; | |
1737 | fs_info.cid = p.second->fscid; | |
1738 | fs_info.name = p.second->mds_map.fs_name; | |
1739 | } | |
1740 | sub->session->con->send_message(new MFSMapUser(mon.monmap->fsid, fsmap_u)); | |
1741 | if (sub->onetime) { | |
1742 | mon.session_map.remove_sub(sub); | |
1743 | } else { | |
1744 | sub->next = fsmap.get_epoch() + 1; | |
7c673cae FG |
1745 | } |
1746 | } else if (sub->type.compare(0, 6, "mdsmap") == 0) { | |
11fdf7f2 | 1747 | const bool is_mds = sub->session->name.is_mds(); |
7c673cae FG |
1748 | mds_gid_t mds_gid = MDS_GID_NONE; |
1749 | fs_cluster_id_t fscid = FS_CLUSTER_ID_NONE; | |
1750 | if (is_mds) { | |
1751 | // What (if any) namespace are you assigned to? | |
1752 | auto mds_info = fsmap.get_mds_info(); | |
1adf2230 | 1753 | for (const auto &p : mds_info) { |
11fdf7f2 | 1754 | if (p.second.addrs == sub->session->addrs) { |
1adf2230 | 1755 | mds_gid = p.first; |
7c673cae FG |
1756 | fscid = fsmap.mds_roles.at(mds_gid); |
1757 | } | |
1758 | } | |
1759 | } else { | |
1760 | // You're a client. Did you request a particular | |
1761 | // namespace? | |
11fdf7f2 | 1762 | if (sub->type.compare(0, 7, "mdsmap.") == 0) { |
7c673cae FG |
1763 | auto namespace_id_str = sub->type.substr(std::string("mdsmap.").size()); |
1764 | dout(10) << __func__ << ": namespace_id " << namespace_id_str << dendl; | |
1765 | std::string err; | |
1766 | fscid = strict_strtoll(namespace_id_str.c_str(), 10, &err); | |
1767 | if (!err.empty()) { | |
1768 | // Client asked for a non-existent namespace, send them nothing | |
1769 | dout(1) << "Invalid client subscription '" << sub->type | |
1770 | << "'" << dendl; | |
1771 | return; | |
1772 | } | |
7c673cae FG |
1773 | } else { |
1774 | // Unqualified request for "mdsmap": give it the one marked | |
1775 | // for use by legacy clients. | |
1776 | if (fsmap.legacy_client_fscid != FS_CLUSTER_ID_NONE) { | |
1777 | fscid = fsmap.legacy_client_fscid; | |
1778 | } else { | |
1779 | dout(1) << "Client subscribed for legacy filesystem but " | |
1780 | "none is configured" << dendl; | |
1781 | return; | |
1782 | } | |
1783 | } | |
b3b6e05e TL |
1784 | if (!fsmap.filesystem_exists(fscid)) { |
1785 | // Client asked for a non-existent namespace, send them nothing | |
1786 | // TODO: something more graceful for when a client has a filesystem | |
1787 | // mounted, and the fileysstem is deleted. Add a "shut down you fool" | |
1788 | // flag to MMDSMap? | |
1789 | dout(1) << "Client subscribed to non-existent namespace '" << | |
1790 | fscid << "'" << dendl; | |
1791 | return; | |
1792 | } | |
7c673cae | 1793 | } |
20effc67 | 1794 | dout(10) << __func__ << ": is_mds=" << is_mds << ", fscid=" << fscid << dendl; |
7c673cae FG |
1795 | |
1796 | // Work out the effective latest epoch | |
28e407b8 | 1797 | const MDSMap *mds_map = nullptr; |
522d829b | 1798 | MDSMap null_map = MDSMap::create_null_mdsmap(); |
7c673cae FG |
1799 | if (fscid == FS_CLUSTER_ID_NONE) { |
1800 | // For a client, we should have already dropped out | |
11fdf7f2 | 1801 | ceph_assert(is_mds); |
7c673cae | 1802 | |
28e407b8 AA |
1803 | auto it = fsmap.standby_daemons.find(mds_gid); |
1804 | if (it != fsmap.standby_daemons.end()) { | |
7c673cae | 1805 | // For an MDS, we need to feed it an MDSMap with its own state in |
28e407b8 AA |
1806 | null_map.mds_info[mds_gid] = it->second; |
1807 | null_map.epoch = fsmap.standby_epochs.at(mds_gid); | |
7c673cae FG |
1808 | } else { |
1809 | null_map.epoch = fsmap.epoch; | |
1810 | } | |
1811 | mds_map = &null_map; | |
1812 | } else { | |
1813 | // Check the effective epoch | |
28e407b8 | 1814 | mds_map = &fsmap.get_filesystem(fscid)->mds_map; |
7c673cae FG |
1815 | } |
1816 | ||
11fdf7f2 | 1817 | ceph_assert(mds_map != nullptr); |
7c673cae FG |
1818 | dout(10) << __func__ << " selected MDS map epoch " << |
1819 | mds_map->epoch << " for namespace " << fscid << " for subscriber " | |
11fdf7f2 | 1820 | << sub->session->name << " who wants epoch " << sub->next << dendl; |
7c673cae FG |
1821 | |
1822 | if (sub->next > mds_map->epoch) { | |
1823 | return; | |
1824 | } | |
20effc67 | 1825 | auto msg = make_message<MMDSMap>(mon.monmap->fsid, *mds_map); |
7c673cae | 1826 | |
11fdf7f2 | 1827 | sub->session->con->send_message(msg.detach()); |
7c673cae | 1828 | if (sub->onetime) { |
f67539c2 | 1829 | mon.session_map.remove_sub(sub); |
7c673cae FG |
1830 | } else { |
1831 | sub->next = mds_map->get_epoch() + 1; | |
1832 | } | |
1833 | } | |
1834 | } | |
1835 | ||
1836 | ||
1837 | void MDSMonitor::update_metadata(mds_gid_t gid, | |
1838 | const map<string, string>& metadata) | |
1839 | { | |
1840 | if (metadata.empty()) { | |
1841 | return; | |
1842 | } | |
1843 | pending_metadata[gid] = metadata; | |
1844 | ||
f67539c2 | 1845 | MonitorDBStore::TransactionRef t = paxos.get_pending_transaction(); |
7c673cae | 1846 | bufferlist bl; |
11fdf7f2 | 1847 | encode(pending_metadata, bl); |
7c673cae | 1848 | t->put(MDS_METADATA_PREFIX, "last_metadata", bl); |
f67539c2 | 1849 | paxos.trigger_propose(); |
7c673cae FG |
1850 | } |
1851 | ||
1adf2230 | 1852 | void MDSMonitor::remove_from_metadata(const FSMap &fsmap, MonitorDBStore::TransactionRef t) |
7c673cae FG |
1853 | { |
1854 | bool update = false; | |
1adf2230 AA |
1855 | for (auto it = pending_metadata.begin(); it != pending_metadata.end(); ) { |
1856 | if (!fsmap.gid_exists(it->first)) { | |
1857 | it = pending_metadata.erase(it); | |
7c673cae FG |
1858 | update = true; |
1859 | } else { | |
1adf2230 | 1860 | ++it; |
7c673cae FG |
1861 | } |
1862 | } | |
1863 | if (!update) | |
1864 | return; | |
1865 | bufferlist bl; | |
11fdf7f2 | 1866 | encode(pending_metadata, bl); |
7c673cae FG |
1867 | t->put(MDS_METADATA_PREFIX, "last_metadata", bl); |
1868 | } | |
1869 | ||
1870 | int MDSMonitor::load_metadata(map<mds_gid_t, Metadata>& m) | |
1871 | { | |
1872 | bufferlist bl; | |
f67539c2 | 1873 | int r = mon.store->get(MDS_METADATA_PREFIX, "last_metadata", bl); |
7c673cae | 1874 | if (r) { |
11fdf7f2 | 1875 | dout(5) << "Unable to load 'last_metadata'" << dendl; |
7c673cae FG |
1876 | return r; |
1877 | } | |
1878 | ||
11fdf7f2 TL |
1879 | auto it = bl.cbegin(); |
1880 | ceph::decode(m, it); | |
7c673cae FG |
1881 | return 0; |
1882 | } | |
1883 | ||
1adf2230 | 1884 | void MDSMonitor::count_metadata(const std::string &field, map<string,int> *out) |
31f18b77 | 1885 | { |
31f18b77 FG |
1886 | map<mds_gid_t,Metadata> meta; |
1887 | load_metadata(meta); | |
1888 | for (auto& p : meta) { | |
1889 | auto q = p.second.find(field); | |
1890 | if (q == p.second.end()) { | |
c07f9fc5 | 1891 | (*out)["unknown"]++; |
31f18b77 | 1892 | } else { |
c07f9fc5 | 1893 | (*out)[q->second]++; |
31f18b77 FG |
1894 | } |
1895 | } | |
c07f9fc5 FG |
1896 | } |
1897 | ||
1adf2230 | 1898 | void MDSMonitor::count_metadata(const std::string &field, Formatter *f) |
c07f9fc5 FG |
1899 | { |
1900 | map<string,int> by_val; | |
1901 | count_metadata(field, &by_val); | |
31f18b77 FG |
1902 | f->open_object_section(field.c_str()); |
1903 | for (auto& p : by_val) { | |
1904 | f->dump_int(p.first.c_str(), p.second); | |
1905 | } | |
1906 | f->close_section(); | |
1907 | } | |
1908 | ||
f67539c2 TL |
1909 | void MDSMonitor::get_versions(std::map<string, list<string> > &versions) |
1910 | { | |
1911 | map<mds_gid_t,Metadata> meta; | |
1912 | load_metadata(meta); | |
1913 | const auto &fsmap = get_fsmap(); | |
1914 | std::map<mds_gid_t, mds_info_t> map = fsmap.get_mds_info(); | |
1915 | dout(10) << __func__ << " mds meta=" << meta << dendl; | |
1916 | for (auto& p : meta) { | |
1917 | auto q = p.second.find("ceph_version_short"); | |
1918 | if (q == p.second.end()) continue; | |
1919 | versions[q->second].push_back(string("mds.") + map[p.first].name); | |
1920 | } | |
1921 | } | |
1922 | ||
1adf2230 AA |
1923 | int MDSMonitor::dump_metadata(const FSMap& fsmap, const std::string &who, |
1924 | Formatter *f, ostream& err) | |
7c673cae | 1925 | { |
11fdf7f2 | 1926 | ceph_assert(f); |
7c673cae | 1927 | |
1adf2230 | 1928 | mds_gid_t gid = gid_from_arg(fsmap, who, err); |
7c673cae FG |
1929 | if (gid == MDS_GID_NONE) { |
1930 | return -EINVAL; | |
1931 | } | |
1932 | ||
1933 | map<mds_gid_t, Metadata> metadata; | |
1934 | if (int r = load_metadata(metadata)) { | |
1935 | err << "Unable to load 'last_metadata'"; | |
1936 | return r; | |
1937 | } | |
1938 | ||
1939 | if (!metadata.count(gid)) { | |
1940 | return -ENOENT; | |
1941 | } | |
1942 | const Metadata& m = metadata[gid]; | |
1943 | for (Metadata::const_iterator p = m.begin(); p != m.end(); ++p) { | |
1944 | f->dump_string(p->first.c_str(), p->second); | |
1945 | } | |
1946 | return 0; | |
1947 | } | |
1948 | ||
1949 | int MDSMonitor::print_nodes(Formatter *f) | |
1950 | { | |
11fdf7f2 | 1951 | ceph_assert(f); |
7c673cae | 1952 | |
1adf2230 AA |
1953 | const auto &fsmap = get_fsmap(); |
1954 | ||
7c673cae FG |
1955 | map<mds_gid_t, Metadata> metadata; |
1956 | if (int r = load_metadata(metadata)) { | |
1957 | return r; | |
1958 | } | |
1959 | ||
11fdf7f2 | 1960 | map<string, list<string> > mdses; // hostname => mds |
1adf2230 AA |
1961 | for (const auto &p : metadata) { |
1962 | const mds_gid_t& gid = p.first; | |
1963 | const Metadata& m = p.second; | |
7c673cae FG |
1964 | Metadata::const_iterator hostname = m.find("hostname"); |
1965 | if (hostname == m.end()) { | |
1966 | // not likely though | |
1967 | continue; | |
1968 | } | |
1adf2230 | 1969 | if (!fsmap.gid_exists(gid)) { |
7c673cae FG |
1970 | dout(5) << __func__ << ": GID " << gid << " not existent" << dendl; |
1971 | continue; | |
1972 | } | |
1adf2230 | 1973 | const MDSMap::mds_info_t& mds_info = fsmap.get_info_gid(gid); |
11fdf7f2 | 1974 | mdses[hostname->second].push_back(mds_info.name); |
7c673cae FG |
1975 | } |
1976 | ||
1977 | dump_services(f, mdses, "mds"); | |
1978 | return 0; | |
1979 | } | |
1980 | ||
1981 | /** | |
1982 | * If a cluster is undersized (with respect to max_mds), then | |
11fdf7f2 TL |
1983 | * attempt to find daemons to grow it. If the cluster is oversized |
1984 | * (with respect to max_mds) then shrink it by stopping its highest rank. | |
7c673cae | 1985 | */ |
11fdf7f2 | 1986 | bool MDSMonitor::maybe_resize_cluster(FSMap &fsmap, fs_cluster_id_t fscid) |
7c673cae | 1987 | { |
11fdf7f2 TL |
1988 | auto ¤t_mds_map = get_fsmap().get_filesystem(fscid)->mds_map; |
1989 | auto&& fs = fsmap.get_filesystem(fscid); | |
1adf2230 | 1990 | auto &mds_map = fs->mds_map; |
7c673cae | 1991 | |
1adf2230 AA |
1992 | int in = mds_map.get_num_in_mds(); |
1993 | int max = mds_map.get_max_mds(); | |
1994 | ||
1995 | dout(20) << __func__ << " in " << in << " max " << max << dendl; | |
1996 | ||
11fdf7f2 TL |
1997 | /* Check that both the current epoch mds_map is resizeable as well as the |
1998 | * current batch of changes in pending. This is important if an MDS is | |
1999 | * becoming active in the next epoch. | |
2000 | */ | |
2001 | if (!current_mds_map.is_resizeable() || | |
2002 | !mds_map.is_resizeable()) { | |
2003 | dout(5) << __func__ << " mds_map is not currently resizeable" << dendl; | |
2004 | return false; | |
2005 | } | |
2006 | ||
2007 | if (in < max && !mds_map.test_flag(CEPH_MDSMAP_NOT_JOINABLE)) { | |
7c673cae | 2008 | mds_rank_t mds = mds_rank_t(0); |
1adf2230 | 2009 | while (mds_map.is_in(mds)) { |
7c673cae FG |
2010 | mds++; |
2011 | } | |
9f95a23c TL |
2012 | auto info = fsmap.find_replacement_for({fscid, mds}); |
2013 | if (!info) { | |
1adf2230 | 2014 | return false; |
7c673cae FG |
2015 | } |
2016 | ||
9f95a23c | 2017 | dout(1) << "assigned standby " << info->addrs |
7c673cae | 2018 | << " as mds." << mds << dendl; |
f67539c2 | 2019 | mon.clog->info() << info->human_name() << " assigned to " |
1adf2230 AA |
2020 | "filesystem " << mds_map.fs_name << " as rank " |
2021 | << mds << " (now has " << mds_map.get_num_in_mds() + 1 | |
d2e6a577 | 2022 | << " ranks)"; |
9f95a23c | 2023 | fsmap.promote(info->global_id, *fs, mds); |
1adf2230 | 2024 | return true; |
11fdf7f2 TL |
2025 | } else if (in > max) { |
2026 | mds_rank_t target = in - 1; | |
2027 | const auto &info = mds_map.get_info(target); | |
2028 | if (mds_map.is_active(target)) { | |
2029 | dout(1) << "stopping " << target << dendl; | |
f67539c2 | 2030 | mon.clog->info() << "stopping " << info.human_name(); |
11fdf7f2 TL |
2031 | auto f = [](auto& info) { |
2032 | info.state = MDSMap::STATE_STOPPING; | |
2033 | }; | |
2034 | fsmap.modify_daemon(info.global_id, f); | |
2035 | return true; | |
2036 | } else { | |
2037 | dout(20) << "skipping stop of " << target << dendl; | |
2038 | return false; | |
2039 | } | |
7c673cae FG |
2040 | } |
2041 | ||
1adf2230 | 2042 | return false; |
7c673cae FG |
2043 | } |
2044 | ||
2045 | ||
2046 | /** | |
9f95a23c | 2047 | * Fail a daemon and replace it with a suitable standby. |
7c673cae | 2048 | */ |
9f95a23c | 2049 | bool MDSMonitor::drop_mds(FSMap &fsmap, mds_gid_t gid, const mds_info_t* rep_info, bool *osd_propose) |
7c673cae | 2050 | { |
11fdf7f2 | 2051 | ceph_assert(osd_propose != nullptr); |
7c673cae | 2052 | |
1adf2230 | 2053 | const auto fscid = fsmap.mds_roles.at(gid); |
9f95a23c TL |
2054 | const auto& info = fsmap.get_info_gid(gid); |
2055 | const auto rank = info.rank; | |
2056 | const auto state = info.state; | |
2057 | ||
2058 | if (info.is_frozen()) { | |
2059 | return false; | |
2060 | } else if (state == MDSMap::STATE_STANDBY_REPLAY || | |
2061 | state == MDSMap::STATE_STANDBY) { | |
2062 | dout(1) << " failing and removing standby " << gid << " " << info.addrs | |
2063 | << " mds." << rank | |
2064 | << "." << info.inc << " " << ceph_mds_state_name(state) | |
2065 | << dendl; | |
2066 | *osd_propose |= fail_mds_gid(fsmap, gid); | |
2067 | return true; | |
2068 | } else if (rank >= 0 && rep_info) { | |
2069 | auto fs = fsmap.filesystems.at(fscid); | |
2070 | if (fs->mds_map.test_flag(CEPH_MDSMAP_NOT_JOINABLE)) { | |
2071 | return false; | |
2072 | } | |
2073 | // are we in? | |
2074 | // and is there a non-laggy standby that can take over for us? | |
2075 | dout(1) << " replacing " << gid << " " << info.addrs | |
2076 | << " mds." << rank << "." << info.inc | |
2077 | << " " << ceph_mds_state_name(state) | |
2078 | << " with " << rep_info->global_id << "/" << rep_info->name << " " << rep_info->addrs | |
2079 | << dendl; | |
2080 | ||
f67539c2 | 2081 | mon.clog->warn() << "Replacing " << info.human_name() |
9f95a23c TL |
2082 | << " as rank " << rank |
2083 | << " with standby " << rep_info->human_name(); | |
2084 | ||
2085 | // Remove the old one | |
2086 | *osd_propose |= fail_mds_gid(fsmap, gid); | |
2087 | ||
2088 | // Promote the replacement | |
2089 | fsmap.promote(rep_info->global_id, *fs, rank); | |
2090 | ||
2091 | return true; | |
2092 | } | |
2093 | return false; | |
2094 | } | |
2095 | ||
2096 | bool MDSMonitor::check_health(FSMap& fsmap, bool* propose_osdmap) | |
2097 | { | |
2098 | bool do_propose = false; | |
2099 | const auto now = mono_clock::now(); | |
f67539c2 | 2100 | const bool osdmap_writeable = mon.osdmon()->is_writeable(); |
9f95a23c TL |
2101 | const auto mds_beacon_grace = g_conf().get_val<double>("mds_beacon_grace"); |
2102 | const auto mds_beacon_interval = g_conf().get_val<double>("mds_beacon_interval"); | |
2103 | ||
2104 | if (mono_clock::is_zero(last_tick)) { | |
2105 | last_tick = now; | |
2106 | } | |
2107 | ||
2108 | { | |
2109 | auto since_last = std::chrono::duration<double>(now-last_tick); | |
2110 | ||
2111 | if (since_last.count() > (mds_beacon_grace-mds_beacon_interval)) { | |
2112 | // This case handles either local slowness (calls being delayed | |
2113 | // for whatever reason) or cluster election slowness (a long gap | |
2114 | // between calls while an election happened) | |
2115 | dout(1) << __func__ << ": resetting beacon timeouts due to mon delay " | |
2116 | "(slow election?) of " << since_last.count() << " seconds" << dendl; | |
2117 | for (auto& p : last_beacon) { | |
2118 | p.second.stamp = now; | |
2119 | } | |
2120 | } | |
2121 | } | |
2122 | ||
2123 | // make sure last_beacon is fully populated | |
2124 | for (auto& p : fsmap.mds_roles) { | |
2125 | auto& gid = p.first; | |
2126 | last_beacon.emplace(std::piecewise_construct, | |
2127 | std::forward_as_tuple(gid), | |
2128 | std::forward_as_tuple(now, 0)); | |
2129 | } | |
7c673cae | 2130 | |
31f18b77 | 2131 | // We will only take decisive action (replacing/removing a daemon) |
9f95a23c | 2132 | // if we have some indication that some other daemon(s) are successfully |
31f18b77 | 2133 | // getting beacons through recently. |
1adf2230 | 2134 | mono_time latest_beacon = mono_clock::zero(); |
9f95a23c | 2135 | for (const auto& p : last_beacon) { |
1adf2230 | 2136 | latest_beacon = std::max(p.second.stamp, latest_beacon); |
31f18b77 | 2137 | } |
f67539c2 | 2138 | auto since = std::chrono::duration<double>(now-latest_beacon); |
1adf2230 | 2139 | const bool may_replace = since.count() < |
11fdf7f2 | 2140 | std::max(g_conf()->mds_beacon_interval, g_conf()->mds_beacon_grace * 0.5); |
31f18b77 | 2141 | |
9f95a23c TL |
2142 | // check beacon timestamps |
2143 | std::vector<mds_gid_t> to_remove; | |
20effc67 TL |
2144 | const bool mon_down = mon.is_mon_down(); |
2145 | const auto mds_beacon_mon_down_grace = | |
2146 | g_conf().get_val<std::chrono::seconds>("mds_beacon_mon_down_grace"); | |
2147 | const auto quorum_age = std::chrono::seconds(mon.quorum_age()); | |
2148 | const bool new_quorum = quorum_age < mds_beacon_mon_down_grace; | |
9f95a23c TL |
2149 | for (auto it = last_beacon.begin(); it != last_beacon.end(); ) { |
2150 | auto& [gid, beacon_info] = *it; | |
f67539c2 | 2151 | auto since_last = std::chrono::duration<double>(now-beacon_info.stamp); |
9f95a23c TL |
2152 | |
2153 | if (!fsmap.gid_exists(gid)) { | |
2154 | // gid no longer exists, remove from tracked beacons | |
2155 | it = last_beacon.erase(it); | |
2156 | continue; | |
2157 | } | |
7c673cae | 2158 | |
9f95a23c TL |
2159 | if (since_last.count() >= g_conf()->mds_beacon_grace) { |
2160 | auto& info = fsmap.get_info_gid(gid); | |
2161 | dout(1) << "no beacon from mds." << info.rank << "." << info.inc | |
2162 | << " (gid: " << gid << " addr: " << info.addrs | |
2163 | << " state: " << ceph_mds_state_name(info.state) << ")" | |
2164 | << " since " << since_last.count() << dendl; | |
20effc67 TL |
2165 | if ((mon_down || new_quorum) && since_last < mds_beacon_mon_down_grace) { |
2166 | /* The MDS may be sending beacons to a monitor not yet in quorum or | |
2167 | * temporarily partitioned. Hold off on removal for a little longer... | |
2168 | */ | |
2169 | dout(10) << "deferring removal for mds_beacon_mon_down_grace during MON_DOWN" << dendl; | |
2170 | ++it; | |
2171 | continue; | |
2172 | } | |
f67539c2 | 2173 | // If the OSDMap is writeable, we can blocklist things, so we can |
9f95a23c TL |
2174 | // try failing any laggy MDS daemons. Consider each one for failure. |
2175 | if (!info.laggy()) { | |
2176 | dout(1) << " marking " << gid << " " << info.addrs | |
2177 | << " mds." << info.rank << "." << info.inc | |
2178 | << " " << ceph_mds_state_name(info.state) | |
2179 | << " laggy" << dendl; | |
2180 | fsmap.modify_daemon(info.global_id, [](auto& info) { | |
2181 | info.laggy_since = ceph_clock_now(); | |
2182 | }); | |
2183 | do_propose = true; | |
2184 | } | |
2185 | if (osdmap_writeable && may_replace) { | |
2186 | to_remove.push_back(gid); // drop_mds may invalidate iterator | |
2187 | } | |
2188 | } | |
31f18b77 | 2189 | |
9f95a23c TL |
2190 | ++it; |
2191 | } | |
7c673cae | 2192 | |
9f95a23c | 2193 | for (const auto& gid : to_remove) { |
f6b5b4d7 | 2194 | auto info = fsmap.get_info_gid(gid); |
9f95a23c TL |
2195 | const mds_info_t* rep_info = nullptr; |
2196 | if (info.rank >= 0) { | |
f67539c2 | 2197 | auto fscid = fsmap.fscid_from_gid(gid); |
9f95a23c TL |
2198 | rep_info = fsmap.find_replacement_for({fscid, info.rank}); |
2199 | } | |
2200 | bool dropped = drop_mds(fsmap, gid, rep_info, propose_osdmap); | |
2201 | if (dropped) { | |
f67539c2 | 2202 | mon.clog->info() << "MDS " << info.human_name() |
9f95a23c TL |
2203 | << " is removed because it is dead or otherwise unavailable."; |
2204 | do_propose = true; | |
2205 | } | |
2206 | } | |
7c673cae | 2207 | |
9f95a23c TL |
2208 | if (osdmap_writeable) { |
2209 | for (auto& [fscid, fs] : fsmap.filesystems) { | |
2210 | if (!fs->mds_map.test_flag(CEPH_MDSMAP_NOT_JOINABLE) && | |
2211 | fs->mds_map.is_resizeable()) { | |
2212 | // Check if a rank or standby-replay should be replaced with a stronger | |
2213 | // affinity standby. This looks at ranks and standby-replay: | |
2214 | for (const auto& [gid, info] : fs->mds_map.get_mds_info()) { | |
2215 | const auto join_fscid = info.join_fscid; | |
2216 | if (join_fscid == fscid) | |
2217 | continue; | |
2218 | const auto rank = info.rank; | |
2219 | const auto state = info.state; | |
2220 | const mds_info_t* rep_info = nullptr; | |
2221 | if (state == MDSMap::STATE_STANDBY_REPLAY) { | |
522d829b | 2222 | rep_info = fsmap.get_available_standby(*fs); |
9f95a23c TL |
2223 | } else if (state == MDSMap::STATE_ACTIVE) { |
2224 | rep_info = fsmap.find_replacement_for({fscid, rank}); | |
2225 | } else { | |
2226 | /* N.B. !is_degraded() */ | |
2227 | ceph_abort_msg("invalid state in MDSMap"); | |
2228 | } | |
2229 | if (!rep_info) { | |
2230 | break; | |
2231 | } | |
2232 | bool better_affinity = false; | |
2233 | if (join_fscid == FS_CLUSTER_ID_NONE) { | |
2234 | better_affinity = (rep_info->join_fscid == fscid); | |
2235 | } else { | |
2236 | better_affinity = (rep_info->join_fscid == fscid) || | |
2237 | (rep_info->join_fscid == FS_CLUSTER_ID_NONE); | |
2238 | } | |
2239 | if (better_affinity) { | |
2240 | if (state == MDSMap::STATE_STANDBY_REPLAY) { | |
f67539c2 | 2241 | mon.clog->info() << "Dropping low affinity standby-replay " |
9f95a23c TL |
2242 | << info.human_name() |
2243 | << " in favor of higher affinity standby."; | |
2244 | *propose_osdmap |= fail_mds_gid(fsmap, gid); | |
2245 | /* Now let maybe_promote_standby do the promotion. */ | |
2246 | } else { | |
f67539c2 | 2247 | mon.clog->info() << "Dropping low affinity active " |
9f95a23c TL |
2248 | << info.human_name() |
2249 | << " in favor of higher affinity standby."; | |
2250 | do_propose |= drop_mds(fsmap, gid, rep_info, propose_osdmap); | |
2251 | } | |
2252 | break; /* don't replace more than one per tick per fs */ | |
2253 | } | |
2254 | } | |
2255 | } | |
2256 | } | |
7c673cae | 2257 | } |
9f95a23c | 2258 | return do_propose; |
7c673cae FG |
2259 | } |
2260 | ||
11fdf7f2 | 2261 | bool MDSMonitor::maybe_promote_standby(FSMap &fsmap, Filesystem& fs) |
7c673cae | 2262 | { |
11fdf7f2 TL |
2263 | if (fs.mds_map.test_flag(CEPH_MDSMAP_NOT_JOINABLE)) { |
2264 | return false; | |
2265 | } | |
7c673cae FG |
2266 | |
2267 | bool do_propose = false; | |
2268 | ||
2269 | // have a standby take over? | |
2270 | set<mds_rank_t> failed; | |
11fdf7f2 TL |
2271 | fs.mds_map.get_failed_mds_set(failed); |
2272 | for (const auto& rank : failed) { | |
9f95a23c TL |
2273 | auto info = fsmap.find_replacement_for({fs.fscid, rank}); |
2274 | if (info) { | |
2275 | dout(1) << " taking over failed mds." << rank << " with " << info->global_id | |
2276 | << "/" << info->name << " " << info->addrs << dendl; | |
f67539c2 | 2277 | mon.clog->info() << "Standby " << info->human_name() |
11fdf7f2 TL |
2278 | << " assigned to filesystem " << fs.mds_map.fs_name |
2279 | << " as rank " << rank; | |
2280 | ||
9f95a23c | 2281 | fsmap.promote(info->global_id, fs, rank); |
11fdf7f2 | 2282 | do_propose = true; |
7c673cae | 2283 | } |
11fdf7f2 TL |
2284 | } |
2285 | ||
f67539c2 | 2286 | if (fs.mds_map.is_resizeable() && fs.mds_map.allows_standby_replay()) { |
7c673cae | 2287 | // There were no failures to replace, so try using any available standbys |
a8e16298 TL |
2288 | // as standby-replay daemons. Don't do this when the cluster is degraded |
2289 | // as a standby-replay daemon may try to read a journal being migrated. | |
11fdf7f2 | 2290 | for (;;) { |
522d829b | 2291 | auto info = fsmap.get_available_standby(fs); |
9f95a23c TL |
2292 | if (!info) break; |
2293 | dout(20) << "standby available mds." << info->global_id << dendl; | |
11fdf7f2 TL |
2294 | bool changed = false; |
2295 | for (const auto& rank : fs.mds_map.in) { | |
9f95a23c | 2296 | dout(20) << "examining " << rank << dendl; |
11fdf7f2 | 2297 | if (fs.mds_map.is_followable(rank)) { |
9f95a23c | 2298 | dout(1) << " setting mds." << info->global_id |
11fdf7f2 | 2299 | << " to follow mds rank " << rank << dendl; |
9f95a23c | 2300 | fsmap.assign_standby_replay(info->global_id, fs.fscid, rank); |
11fdf7f2 TL |
2301 | do_propose = true; |
2302 | changed = true; | |
2303 | break; | |
7c673cae | 2304 | } |
7c673cae | 2305 | } |
11fdf7f2 | 2306 | if (!changed) break; |
7c673cae FG |
2307 | } |
2308 | } | |
2309 | ||
2310 | return do_propose; | |
2311 | } | |
2312 | ||
2313 | void MDSMonitor::tick() | |
2314 | { | |
1adf2230 | 2315 | if (!is_active() || !is_leader()) return; |
28e407b8 AA |
2316 | |
2317 | auto &pending = get_pending_fsmap_writeable(); | |
7c673cae | 2318 | |
28e407b8 | 2319 | bool do_propose = false; |
9f95a23c | 2320 | bool propose_osdmap = false; |
7c673cae | 2321 | |
522d829b TL |
2322 | if (check_fsmap_struct_version) { |
2323 | /* Allow time for trimming otherwise PaxosService::is_writeable will always | |
2324 | * be false. | |
2325 | */ | |
2326 | ||
2327 | auto now = clock::now(); | |
2328 | auto elapsed = now - last_fsmap_struct_flush; | |
2329 | if (elapsed > std::chrono::seconds(30)) { | |
2330 | FSMap fsmap; | |
2331 | bufferlist bl; | |
2332 | auto v = get_first_committed(); | |
2333 | int err = get_version(v, bl); | |
2334 | if (err) { | |
2335 | derr << "could not get version " << v << dendl; | |
2336 | ceph_abort(); | |
2337 | } | |
a4b75251 TL |
2338 | try { |
2339 | fsmap.decode(bl); | |
2340 | } catch (const ceph::buffer::malformed_input& e) { | |
2341 | dout(5) << "flushing old fsmap struct because unable to decode FSMap: " << e.what() << dendl; | |
2342 | } | |
2343 | /* N.B. FSMap::is_struct_old is also true for undecoded (failed to decode) FSMap */ | |
522d829b TL |
2344 | if (fsmap.is_struct_old()) { |
2345 | dout(5) << "fsmap struct is too old; proposing to flush out old versions" << dendl; | |
2346 | do_propose = true; | |
2347 | last_fsmap_struct_flush = now; | |
2348 | } else { | |
2349 | dout(20) << "struct is recent" << dendl; | |
2350 | check_fsmap_struct_version = false; | |
2351 | } | |
2352 | } | |
2353 | } | |
2354 | ||
28e407b8 | 2355 | do_propose |= pending.check_health(); |
7c673cae | 2356 | |
9f95a23c TL |
2357 | /* Check health and affinity of ranks */ |
2358 | do_propose |= check_health(pending, &propose_osdmap); | |
7c673cae | 2359 | |
9f95a23c TL |
2360 | /* Resize the cluster according to max_mds. */ |
2361 | for (auto& p : pending.filesystems) { | |
2362 | do_propose |= maybe_resize_cluster(pending, p.second->fscid); | |
7c673cae FG |
2363 | } |
2364 | ||
9f95a23c TL |
2365 | /* Replace any failed ranks. */ |
2366 | for (auto& p : pending.filesystems) { | |
2367 | do_propose |= maybe_promote_standby(pending, *p.second); | |
7c673cae FG |
2368 | } |
2369 | ||
c07f9fc5 | 2370 | if (propose_osdmap) { |
f67539c2 | 2371 | request_proposal(mon.osdmon()); |
c07f9fc5 | 2372 | } |
7c673cae | 2373 | |
7c673cae FG |
2374 | if (do_propose) { |
2375 | propose_pending(); | |
2376 | } | |
9f95a23c TL |
2377 | |
2378 | last_tick = mono_clock::now(); | |
7c673cae FG |
2379 | } |
2380 | ||
f67539c2 | 2381 | MDSMonitor::MDSMonitor(Monitor &mn, Paxos &p, string service_name) |
7c673cae FG |
2382 | : PaxosService(mn, p, service_name) |
2383 | { | |
f67539c2 | 2384 | handlers = FileSystemCommandHandler::load(&p); |
7c673cae FG |
2385 | } |
2386 | ||
2387 | void MDSMonitor::on_restart() | |
2388 | { | |
2389 | // Clear out the leader-specific state. | |
1adf2230 | 2390 | last_tick = mono_clock::now(); |
7c673cae FG |
2391 | last_beacon.clear(); |
2392 | } | |
2393 |