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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 | ||
15 | ||
16 | #include "FSMap.h" | |
17 | ||
18 | #include <sstream> | |
19 | using std::stringstream; | |
20 | ||
224ce89b WB |
21 | #include "mon/health_check.h" |
22 | ||
7c673cae FG |
23 | |
24 | void Filesystem::dump(Formatter *f) const | |
25 | { | |
26 | f->open_object_section("mdsmap"); | |
27 | mds_map.dump(f); | |
28 | f->close_section(); | |
29 | f->dump_int("id", fscid); | |
30 | } | |
31 | ||
32 | void FSMap::dump(Formatter *f) const | |
33 | { | |
34 | f->dump_int("epoch", epoch); | |
35 | ||
36 | f->open_object_section("compat"); | |
37 | compat.dump(f); | |
38 | f->close_section(); | |
39 | ||
40 | f->open_object_section("feature_flags"); | |
41 | f->dump_bool("enable_multiple", enable_multiple); | |
42 | f->dump_bool("ever_enabled_multiple", ever_enabled_multiple); | |
43 | f->close_section(); | |
44 | ||
45 | f->open_array_section("standbys"); | |
46 | for (const auto &i : standby_daemons) { | |
47 | f->open_object_section("info"); | |
48 | i.second.dump(f); | |
49 | f->dump_int("epoch", standby_epochs.at(i.first)); | |
50 | f->close_section(); | |
51 | } | |
52 | f->close_section(); | |
53 | ||
54 | f->open_array_section("filesystems"); | |
55 | for (const auto &fs : filesystems) { | |
56 | f->open_object_section("filesystem"); | |
57 | fs.second->dump(f); | |
58 | f->close_section(); | |
59 | } | |
60 | f->close_section(); | |
61 | } | |
62 | ||
63 | void FSMap::generate_test_instances(list<FSMap*>& ls) | |
64 | { | |
65 | FSMap *m = new FSMap(); | |
66 | ||
67 | std::list<MDSMap*> mds_map_instances; | |
68 | MDSMap::generate_test_instances(mds_map_instances); | |
69 | ||
70 | int k = 20; | |
71 | for (auto i : mds_map_instances) { | |
72 | auto fs = std::make_shared<Filesystem>(); | |
73 | fs->fscid = k++; | |
74 | fs->mds_map = *i; | |
75 | delete i; | |
76 | m->filesystems[fs->fscid] = fs; | |
77 | } | |
78 | mds_map_instances.clear(); | |
79 | ||
80 | ls.push_back(m); | |
81 | } | |
82 | ||
83 | void FSMap::print(ostream& out) const | |
84 | { | |
85 | out << "e" << epoch << std::endl; | |
86 | out << "enable_multiple, ever_enabled_multiple: " << enable_multiple << "," | |
87 | << ever_enabled_multiple << std::endl; | |
88 | out << "compat: " << compat << std::endl; | |
89 | out << "legacy client fscid: " << legacy_client_fscid << std::endl; | |
90 | out << " " << std::endl; | |
91 | ||
92 | if (filesystems.empty()) { | |
93 | out << "No filesystems configured" << std::endl; | |
94 | return; | |
95 | } | |
96 | ||
97 | for (const auto &fs : filesystems) { | |
98 | fs.second->print(out); | |
99 | out << " " << std::endl << " " << std::endl; // Space out a bit | |
100 | } | |
101 | ||
102 | if (!standby_daemons.empty()) { | |
103 | out << "Standby daemons:" << std::endl << " " << std::endl; | |
104 | } | |
105 | ||
106 | for (const auto &p : standby_daemons) { | |
107 | p.second.print_summary(out); | |
108 | out << std::endl; | |
109 | } | |
110 | } | |
111 | ||
112 | ||
113 | ||
114 | void FSMap::print_summary(Formatter *f, ostream *out) const | |
115 | { | |
116 | map<mds_role_t,string> by_rank; | |
117 | map<string,int> by_state; | |
118 | ||
119 | if (f) { | |
120 | f->dump_unsigned("epoch", get_epoch()); | |
121 | for (auto i : filesystems) { | |
122 | auto fs = i.second; | |
123 | f->dump_unsigned("id", fs->fscid); | |
124 | f->dump_unsigned("up", fs->mds_map.up.size()); | |
125 | f->dump_unsigned("in", fs->mds_map.in.size()); | |
126 | f->dump_unsigned("max", fs->mds_map.max_mds); | |
127 | } | |
128 | } else { | |
7c673cae FG |
129 | if (filesystems.size() == 1) { |
130 | auto fs = filesystems.begin()->second; | |
31f18b77 | 131 | *out << fs->mds_map.up.size() << "/" << fs->mds_map.in.size() << "/" |
7c673cae FG |
132 | << fs->mds_map.max_mds << " up"; |
133 | } else { | |
134 | for (auto i : filesystems) { | |
135 | auto fs = i.second; | |
31f18b77 FG |
136 | *out << fs->mds_map.fs_name << "-" << fs->mds_map.up.size() << "/" |
137 | << fs->mds_map.in.size() << "/" << fs->mds_map.max_mds << " up "; | |
7c673cae FG |
138 | } |
139 | } | |
140 | } | |
141 | ||
142 | if (f) { | |
143 | f->open_array_section("by_rank"); | |
144 | } | |
145 | ||
146 | const auto all_info = get_mds_info(); | |
147 | for (const auto &p : all_info) { | |
148 | const auto &info = p.second; | |
149 | string s = ceph_mds_state_name(info.state); | |
150 | if (info.laggy()) { | |
151 | s += "(laggy or crashed)"; | |
152 | } | |
153 | ||
154 | const fs_cluster_id_t fscid = mds_roles.at(info.global_id); | |
155 | ||
156 | if (info.rank != MDS_RANK_NONE && | |
157 | info.state != MDSMap::STATE_STANDBY_REPLAY) { | |
158 | if (f) { | |
159 | f->open_object_section("mds"); | |
160 | f->dump_unsigned("filesystem_id", fscid); | |
161 | f->dump_unsigned("rank", info.rank); | |
162 | f->dump_string("name", info.name); | |
163 | f->dump_string("status", s); | |
164 | f->close_section(); | |
165 | } else { | |
166 | by_rank[mds_role_t(fscid, info.rank)] = info.name + "=" + s; | |
167 | } | |
168 | } else { | |
169 | by_state[s]++; | |
170 | } | |
171 | } | |
172 | ||
173 | if (f) { | |
174 | f->close_section(); | |
175 | } else { | |
176 | if (!by_rank.empty()) { | |
177 | if (filesystems.size() > 1) { | |
178 | // Disambiguate filesystems | |
179 | std::map<std::string, std::string> pretty; | |
180 | for (auto i : by_rank) { | |
181 | const auto &fs_name = filesystems.at(i.first.fscid)->mds_map.fs_name; | |
182 | std::ostringstream o; | |
183 | o << "[" << fs_name << ":" << i.first.rank << "]"; | |
184 | pretty[o.str()] = i.second; | |
185 | } | |
186 | *out << " " << pretty; | |
187 | } else { | |
188 | // Omit FSCID in output when only one filesystem exists | |
189 | std::map<mds_rank_t, std::string> shortened; | |
190 | for (auto i : by_rank) { | |
191 | shortened[i.first.rank] = i.second; | |
192 | } | |
193 | *out << " " << shortened; | |
194 | } | |
195 | } | |
196 | } | |
197 | ||
198 | for (map<string,int>::reverse_iterator p = by_state.rbegin(); p != by_state.rend(); ++p) { | |
199 | if (f) { | |
200 | f->dump_unsigned(p->first.c_str(), p->second); | |
201 | } else { | |
202 | *out << ", " << p->second << " " << p->first; | |
203 | } | |
204 | } | |
205 | ||
206 | size_t failed = 0; | |
207 | size_t damaged = 0; | |
208 | for (auto i : filesystems) { | |
209 | auto fs = i.second; | |
210 | failed += fs->mds_map.failed.size(); | |
211 | damaged += fs->mds_map.damaged.size(); | |
212 | } | |
213 | ||
214 | if (failed > 0) { | |
215 | if (f) { | |
216 | f->dump_unsigned("failed", failed); | |
217 | } else { | |
218 | *out << ", " << failed << " failed"; | |
219 | } | |
220 | } | |
221 | ||
222 | if (damaged > 0) { | |
223 | if (f) { | |
224 | f->dump_unsigned("damaged", damaged); | |
225 | } else { | |
226 | *out << ", " << damaged << " damaged"; | |
227 | } | |
228 | } | |
229 | //if (stopped.size()) | |
230 | //out << ", " << stopped.size() << " stopped"; | |
231 | } | |
232 | ||
233 | ||
234 | void FSMap::create_filesystem(const std::string &name, | |
235 | int64_t metadata_pool, int64_t data_pool, | |
236 | uint64_t features) | |
237 | { | |
238 | auto fs = std::make_shared<Filesystem>(); | |
239 | fs->mds_map.fs_name = name; | |
240 | fs->mds_map.max_mds = 1; | |
31f18b77 | 241 | fs->mds_map.data_pools.push_back(data_pool); |
7c673cae FG |
242 | fs->mds_map.metadata_pool = metadata_pool; |
243 | fs->mds_map.cas_pool = -1; | |
244 | fs->mds_map.max_file_size = g_conf->mds_max_file_size; | |
245 | fs->mds_map.compat = compat; | |
246 | fs->mds_map.created = ceph_clock_now(); | |
247 | fs->mds_map.modified = ceph_clock_now(); | |
248 | fs->mds_map.session_timeout = g_conf->mds_session_timeout; | |
249 | fs->mds_map.session_autoclose = g_conf->mds_session_autoclose; | |
250 | fs->mds_map.enabled = true; | |
251 | if (features & CEPH_FEATURE_SERVER_JEWEL) { | |
252 | fs->fscid = next_filesystem_id++; | |
253 | // ANONYMOUS is only for upgrades from legacy mdsmaps, we should | |
254 | // have initialized next_filesystem_id such that it's never used here. | |
255 | assert(fs->fscid != FS_CLUSTER_ID_ANONYMOUS); | |
256 | } else { | |
257 | // Use anon fscid because this will get thrown away when encoding | |
258 | // as legacy MDSMap for legacy mons. | |
259 | assert(filesystems.empty()); | |
260 | fs->fscid = FS_CLUSTER_ID_ANONYMOUS; | |
261 | } | |
262 | filesystems[fs->fscid] = fs; | |
263 | ||
264 | // Created first filesystem? Set it as the one | |
265 | // for legacy clients to use | |
266 | if (filesystems.size() == 1) { | |
267 | legacy_client_fscid = fs->fscid; | |
268 | } | |
269 | } | |
270 | ||
271 | void FSMap::reset_filesystem(fs_cluster_id_t fscid) | |
272 | { | |
273 | auto fs = get_filesystem(fscid); | |
274 | auto new_fs = std::make_shared<Filesystem>(); | |
275 | ||
276 | // Populate rank 0 as existing (so don't go into CREATING) | |
277 | // but failed (so that next available MDS is assigned the rank) | |
278 | new_fs->mds_map.in.insert(mds_rank_t(0)); | |
279 | new_fs->mds_map.failed.insert(mds_rank_t(0)); | |
280 | ||
281 | // Carry forward what makes sense | |
282 | new_fs->fscid = fs->fscid; | |
283 | new_fs->mds_map.inline_data_enabled = fs->mds_map.inline_data_enabled; | |
284 | new_fs->mds_map.max_mds = 1; | |
285 | new_fs->mds_map.data_pools = fs->mds_map.data_pools; | |
286 | new_fs->mds_map.metadata_pool = fs->mds_map.metadata_pool; | |
287 | new_fs->mds_map.cas_pool = fs->mds_map.cas_pool; | |
288 | new_fs->mds_map.fs_name = fs->mds_map.fs_name; | |
289 | new_fs->mds_map.max_file_size = g_conf->mds_max_file_size; | |
290 | new_fs->mds_map.compat = compat; | |
291 | new_fs->mds_map.created = ceph_clock_now(); | |
292 | new_fs->mds_map.modified = ceph_clock_now(); | |
293 | new_fs->mds_map.session_timeout = g_conf->mds_session_timeout; | |
294 | new_fs->mds_map.session_autoclose = g_conf->mds_session_autoclose; | |
295 | new_fs->mds_map.standby_count_wanted = fs->mds_map.standby_count_wanted; | |
296 | new_fs->mds_map.enabled = true; | |
297 | ||
298 | // Persist the new FSMap | |
299 | filesystems[new_fs->fscid] = new_fs; | |
300 | } | |
301 | ||
302 | void FSMap::get_health(list<pair<health_status_t,string> >& summary, | |
303 | list<pair<health_status_t,string> > *detail) const | |
304 | { | |
305 | mds_rank_t standby_count_wanted = 0; | |
306 | for (const auto &i : filesystems) { | |
307 | const auto &fs = i.second; | |
308 | ||
309 | // TODO: move get_health up into here so that we can qualify | |
310 | // all the messages with what filesystem they're talking about | |
311 | fs->mds_map.get_health(summary, detail); | |
312 | ||
313 | standby_count_wanted = std::max(standby_count_wanted, fs->mds_map.get_standby_count_wanted((mds_rank_t)standby_daemons.size())); | |
314 | } | |
315 | ||
316 | if (standby_count_wanted) { | |
317 | std::ostringstream oss; | |
318 | oss << "insufficient standby daemons available: have " << standby_daemons.size() << "; want " << standby_count_wanted << " more"; | |
319 | summary.push_back(make_pair(HEALTH_WARN, oss.str())); | |
320 | } | |
321 | } | |
322 | ||
323 | bool FSMap::check_health(void) | |
324 | { | |
325 | bool changed = false; | |
326 | for (auto &i : filesystems) { | |
327 | changed |= i.second->mds_map.check_health((mds_rank_t)standby_daemons.size()); | |
328 | } | |
329 | return changed; | |
330 | } | |
331 | ||
224ce89b WB |
332 | void FSMap::get_health_checks(health_check_map_t *checks) const |
333 | { | |
334 | mds_rank_t standby_count_wanted = 0; | |
335 | for (const auto &i : filesystems) { | |
336 | const auto &fs = i.second; | |
337 | health_check_map_t fschecks; | |
338 | fs->mds_map.get_health_checks(&fschecks); | |
339 | checks->merge(fschecks); | |
340 | standby_count_wanted = std::max( | |
341 | standby_count_wanted, | |
342 | fs->mds_map.get_standby_count_wanted((mds_rank_t)standby_daemons.size())); | |
343 | } | |
344 | ||
345 | // MDS_INSUFFICIENT_STANDBY | |
346 | if (standby_count_wanted) { | |
347 | std::ostringstream oss, dss; | |
348 | oss << "insufficient standby daemons available"; | |
349 | auto& d = checks->add("MDS_INSUFFICIENT_STANDBY", HEALTH_WARN, oss.str()); | |
350 | dss << "have " << standby_daemons.size() << "; want " << standby_count_wanted | |
351 | << " more"; | |
352 | d.detail.push_back(dss.str()); | |
353 | } | |
354 | } | |
355 | ||
7c673cae FG |
356 | void FSMap::encode(bufferlist& bl, uint64_t features) const |
357 | { | |
358 | if (features & CEPH_FEATURE_SERVER_JEWEL) { | |
359 | ENCODE_START(7, 6, bl); | |
360 | ::encode(epoch, bl); | |
361 | ::encode(next_filesystem_id, bl); | |
362 | ::encode(legacy_client_fscid, bl); | |
363 | ::encode(compat, bl); | |
364 | ::encode(enable_multiple, bl); | |
365 | std::vector<Filesystem> fs_list; | |
366 | for (auto i : filesystems) { | |
367 | fs_list.push_back(*(i.second)); | |
368 | } | |
369 | ::encode(fs_list, bl, features); | |
370 | ::encode(mds_roles, bl); | |
371 | ::encode(standby_daemons, bl, features); | |
372 | ::encode(standby_epochs, bl); | |
373 | ::encode(ever_enabled_multiple, bl); | |
374 | ENCODE_FINISH(bl); | |
375 | } else { | |
376 | if (filesystems.empty()) { | |
377 | MDSMap disabled_map; | |
378 | disabled_map.epoch = epoch; | |
379 | disabled_map.encode(bl, features); | |
380 | } else { | |
381 | // MDSMonitor should never have created multiple filesystems | |
382 | // until the quorum features indicated Jewel | |
383 | assert(filesystems.size() == 1); | |
384 | auto fs = filesystems.begin()->second; | |
385 | ||
386 | // Take the MDSMap for the enabled filesystem, and populated its | |
387 | // mds_info with the standbys to get a pre-jewel-style mon MDSMap. | |
388 | MDSMap full_mdsmap = fs->mds_map; | |
389 | full_mdsmap.epoch = epoch; | |
390 | for (const auto &p : standby_daemons) { | |
391 | full_mdsmap.mds_info[p.first] = p.second; | |
392 | } | |
393 | ||
394 | // Old MDSMaps don't set rank on standby replay daemons | |
395 | for (auto &i : full_mdsmap.mds_info) { | |
396 | auto &info = i.second; | |
397 | if (info.state == MDSMap::STATE_STANDBY_REPLAY) { | |
398 | info.rank = MDS_RANK_NONE; | |
399 | } | |
400 | } | |
401 | ||
402 | full_mdsmap.encode(bl, features); | |
403 | } | |
404 | } | |
405 | } | |
406 | ||
407 | void FSMap::decode(bufferlist::iterator& p) | |
408 | { | |
409 | // Because the mon used to store an MDSMap where we now | |
410 | // store an FSMap, FSMap knows how to decode the legacy | |
411 | // MDSMap format (it never needs to encode it though). | |
412 | MDSMap legacy_mds_map; | |
413 | ||
414 | // The highest MDSMap encoding version before we changed the | |
415 | // MDSMonitor to store an FSMap instead of an MDSMap was | |
416 | // 5, so anything older than 6 is decoded as an MDSMap, | |
417 | // and anything newer is decoded as an FSMap. | |
418 | DECODE_START_LEGACY_COMPAT_LEN_16(7, 4, 4, p); | |
419 | if (struct_v < 6) { | |
420 | // Decoding an MDSMap (upgrade) | |
421 | ::decode(epoch, p); | |
422 | ::decode(legacy_mds_map.flags, p); | |
423 | ::decode(legacy_mds_map.last_failure, p); | |
424 | ::decode(legacy_mds_map.root, p); | |
425 | ::decode(legacy_mds_map.session_timeout, p); | |
426 | ::decode(legacy_mds_map.session_autoclose, p); | |
427 | ::decode(legacy_mds_map.max_file_size, p); | |
428 | ::decode(legacy_mds_map.max_mds, p); | |
429 | ::decode(legacy_mds_map.mds_info, p); | |
430 | if (struct_v < 3) { | |
431 | __u32 n; | |
432 | ::decode(n, p); | |
433 | while (n--) { | |
434 | __u32 m; | |
435 | ::decode(m, p); | |
31f18b77 | 436 | legacy_mds_map.data_pools.push_back(m); |
7c673cae FG |
437 | } |
438 | __s32 s; | |
439 | ::decode(s, p); | |
440 | legacy_mds_map.cas_pool = s; | |
441 | } else { | |
442 | ::decode(legacy_mds_map.data_pools, p); | |
443 | ::decode(legacy_mds_map.cas_pool, p); | |
444 | } | |
445 | ||
446 | // kclient ignores everything from here | |
447 | __u16 ev = 1; | |
448 | if (struct_v >= 2) | |
449 | ::decode(ev, p); | |
450 | if (ev >= 3) | |
451 | ::decode(legacy_mds_map.compat, p); | |
452 | else | |
453 | legacy_mds_map.compat = get_mdsmap_compat_set_base(); | |
454 | if (ev < 5) { | |
455 | __u32 n; | |
456 | ::decode(n, p); | |
457 | legacy_mds_map.metadata_pool = n; | |
458 | } else { | |
459 | ::decode(legacy_mds_map.metadata_pool, p); | |
460 | } | |
461 | ::decode(legacy_mds_map.created, p); | |
462 | ::decode(legacy_mds_map.modified, p); | |
463 | ::decode(legacy_mds_map.tableserver, p); | |
464 | ::decode(legacy_mds_map.in, p); | |
465 | std::map<mds_rank_t,int32_t> inc; // Legacy field, parse and drop | |
466 | ::decode(inc, p); | |
467 | ::decode(legacy_mds_map.up, p); | |
468 | ::decode(legacy_mds_map.failed, p); | |
469 | ::decode(legacy_mds_map.stopped, p); | |
470 | if (ev >= 4) | |
471 | ::decode(legacy_mds_map.last_failure_osd_epoch, p); | |
472 | if (ev >= 6) { | |
473 | if (ev < 10) { | |
474 | // previously this was a bool about snaps, not a flag map | |
475 | bool flag; | |
476 | ::decode(flag, p); | |
477 | legacy_mds_map.ever_allowed_features = flag ? | |
478 | CEPH_MDSMAP_ALLOW_SNAPS : 0; | |
479 | ::decode(flag, p); | |
480 | legacy_mds_map.explicitly_allowed_features = flag ? | |
481 | CEPH_MDSMAP_ALLOW_SNAPS : 0; | |
482 | if (legacy_mds_map.max_mds > 1) { | |
483 | legacy_mds_map.set_multimds_allowed(); | |
484 | } | |
485 | } else { | |
486 | ::decode(legacy_mds_map.ever_allowed_features, p); | |
487 | ::decode(legacy_mds_map.explicitly_allowed_features, p); | |
488 | } | |
489 | } else { | |
490 | legacy_mds_map.ever_allowed_features = CEPH_MDSMAP_ALLOW_CLASSICS; | |
491 | legacy_mds_map.explicitly_allowed_features = 0; | |
492 | if (legacy_mds_map.max_mds > 1) { | |
493 | legacy_mds_map.set_multimds_allowed(); | |
494 | } | |
495 | } | |
496 | if (ev >= 7) | |
497 | ::decode(legacy_mds_map.inline_data_enabled, p); | |
498 | ||
499 | if (ev >= 8) { | |
500 | assert(struct_v >= 5); | |
501 | ::decode(legacy_mds_map.enabled, p); | |
502 | ::decode(legacy_mds_map.fs_name, p); | |
503 | } else { | |
504 | legacy_mds_map.fs_name = "default"; | |
505 | if (epoch > 1) { | |
506 | // If an MDS has ever been started, epoch will be greater than 1, | |
507 | // assume filesystem is enabled. | |
508 | legacy_mds_map.enabled = true; | |
509 | } else { | |
510 | // Upgrading from a cluster that never used an MDS, switch off | |
511 | // filesystem until it's explicitly enabled. | |
512 | legacy_mds_map.enabled = false; | |
513 | } | |
514 | } | |
515 | ||
516 | if (ev >= 9) { | |
517 | ::decode(legacy_mds_map.damaged, p); | |
518 | } | |
519 | ||
520 | // We're upgrading, populate filesystems from the legacy fields | |
521 | filesystems.clear(); | |
522 | standby_daemons.clear(); | |
523 | standby_epochs.clear(); | |
524 | mds_roles.clear(); | |
525 | compat = legacy_mds_map.compat; | |
526 | enable_multiple = false; | |
527 | ||
528 | // Synthesise a Filesystem from legacy_mds_map, if enabled | |
529 | if (legacy_mds_map.enabled) { | |
530 | // Construct a Filesystem from the legacy MDSMap | |
531 | auto migrate_fs = std::make_shared<Filesystem>(); | |
532 | migrate_fs->fscid = FS_CLUSTER_ID_ANONYMOUS; | |
533 | migrate_fs->mds_map = legacy_mds_map; | |
534 | migrate_fs->mds_map.epoch = epoch; | |
535 | filesystems[migrate_fs->fscid] = migrate_fs; | |
536 | ||
537 | // List of GIDs that had invalid states | |
538 | std::set<mds_gid_t> drop_gids; | |
539 | ||
540 | // Construct mds_roles, standby_daemons, and remove | |
541 | // standbys from the MDSMap in the Filesystem. | |
542 | for (auto &p : migrate_fs->mds_map.mds_info) { | |
543 | if (p.second.state == MDSMap::STATE_STANDBY_REPLAY) { | |
544 | // In legacy MDSMap, standby replay daemons don't have | |
545 | // rank set, but since FSMap they do. | |
546 | p.second.rank = p.second.standby_for_rank; | |
547 | } | |
548 | if (p.second.rank == MDS_RANK_NONE) { | |
549 | if (p.second.state != MDSMap::STATE_STANDBY) { | |
550 | // Old MDSMaps can have down:dne here, which | |
551 | // is invalid in an FSMap (#17837) | |
552 | drop_gids.insert(p.first); | |
553 | } else { | |
554 | insert(p.second); // into standby_daemons | |
555 | } | |
556 | } else { | |
557 | mds_roles[p.first] = migrate_fs->fscid; | |
558 | } | |
559 | } | |
560 | for (const auto &p : standby_daemons) { | |
561 | // Erase from this Filesystem's MDSMap, because it has | |
562 | // been copied into FSMap::Standby_daemons above | |
563 | migrate_fs->mds_map.mds_info.erase(p.first); | |
564 | } | |
565 | for (const auto &gid : drop_gids) { | |
566 | // Throw away all info for this MDS because it was identified | |
567 | // as having invalid state above. | |
568 | migrate_fs->mds_map.mds_info.erase(gid); | |
569 | } | |
570 | ||
571 | legacy_client_fscid = migrate_fs->fscid; | |
572 | } else { | |
573 | legacy_client_fscid = FS_CLUSTER_ID_NONE; | |
574 | } | |
575 | } else { | |
576 | ::decode(epoch, p); | |
577 | ::decode(next_filesystem_id, p); | |
578 | ::decode(legacy_client_fscid, p); | |
579 | ::decode(compat, p); | |
580 | ::decode(enable_multiple, p); | |
581 | std::vector<Filesystem> fs_list; | |
582 | ::decode(fs_list, p); | |
583 | filesystems.clear(); | |
584 | for (std::vector<Filesystem>::const_iterator fs = fs_list.begin(); fs != fs_list.end(); ++fs) { | |
585 | filesystems[fs->fscid] = std::make_shared<Filesystem>(*fs); | |
586 | } | |
587 | ||
588 | ::decode(mds_roles, p); | |
589 | ::decode(standby_daemons, p); | |
590 | ::decode(standby_epochs, p); | |
591 | if (struct_v >= 7) { | |
592 | ::decode(ever_enabled_multiple, p); | |
593 | } | |
594 | } | |
595 | ||
596 | DECODE_FINISH(p); | |
597 | } | |
598 | ||
599 | ||
600 | void Filesystem::encode(bufferlist& bl, uint64_t features) const | |
601 | { | |
602 | ENCODE_START(1, 1, bl); | |
603 | ::encode(fscid, bl); | |
604 | bufferlist mdsmap_bl; | |
605 | mds_map.encode(mdsmap_bl, features); | |
606 | ::encode(mdsmap_bl, bl); | |
607 | ENCODE_FINISH(bl); | |
608 | } | |
609 | ||
610 | void Filesystem::decode(bufferlist::iterator& p) | |
611 | { | |
612 | DECODE_START(1, p); | |
613 | ::decode(fscid, p); | |
614 | bufferlist mdsmap_bl; | |
615 | ::decode(mdsmap_bl, p); | |
616 | bufferlist::iterator mdsmap_bl_iter = mdsmap_bl.begin(); | |
617 | mds_map.decode(mdsmap_bl_iter); | |
618 | DECODE_FINISH(p); | |
619 | } | |
620 | ||
621 | int FSMap::parse_filesystem( | |
622 | std::string const &ns_str, | |
623 | std::shared_ptr<const Filesystem> *result | |
624 | ) const | |
625 | { | |
626 | std::string ns_err; | |
627 | fs_cluster_id_t fscid = strict_strtol(ns_str.c_str(), 10, &ns_err); | |
628 | if (!ns_err.empty() || filesystems.count(fscid) == 0) { | |
629 | for (auto &fs : filesystems) { | |
630 | if (fs.second->mds_map.fs_name == ns_str) { | |
631 | *result = std::const_pointer_cast<const Filesystem>(fs.second); | |
632 | return 0; | |
633 | } | |
634 | } | |
635 | return -ENOENT; | |
636 | } else { | |
637 | *result = get_filesystem(fscid); | |
638 | return 0; | |
639 | } | |
640 | } | |
641 | ||
642 | void Filesystem::print(std::ostream &out) const | |
643 | { | |
644 | out << "Filesystem '" << mds_map.fs_name | |
645 | << "' (" << fscid << ")" << std::endl; | |
646 | mds_map.print(out); | |
647 | } | |
648 | ||
649 | mds_gid_t FSMap::find_standby_for(mds_role_t role, const std::string& name) const | |
650 | { | |
651 | mds_gid_t result = MDS_GID_NONE; | |
652 | ||
653 | // First see if we have a STANDBY_REPLAY | |
654 | auto fs = get_filesystem(role.fscid); | |
655 | for (const auto &i : fs->mds_map.mds_info) { | |
656 | const auto &info = i.second; | |
657 | if (info.rank == role.rank && info.state == MDSMap::STATE_STANDBY_REPLAY) { | |
658 | return info.global_id; | |
659 | } | |
660 | } | |
661 | ||
662 | // See if there are any STANDBY daemons available | |
663 | for (const auto &i : standby_daemons) { | |
664 | const auto &gid = i.first; | |
665 | const auto &info = i.second; | |
666 | assert(info.state == MDSMap::STATE_STANDBY); | |
667 | assert(info.rank == MDS_RANK_NONE); | |
668 | ||
669 | if (info.laggy()) { | |
670 | continue; | |
671 | } | |
672 | ||
673 | // The mds_info_t may or may not tell us exactly which filesystem | |
674 | // the standby_for_rank refers to: lookup via legacy_client_fscid | |
675 | mds_role_t target_role = { | |
676 | info.standby_for_fscid == FS_CLUSTER_ID_NONE ? | |
677 | legacy_client_fscid : info.standby_for_fscid, | |
678 | info.standby_for_rank}; | |
679 | ||
680 | if ((target_role.rank == role.rank && target_role.fscid == role.fscid) | |
681 | || (name.length() && info.standby_for_name == name)) { | |
682 | // It's a named standby for *me*, use it. | |
683 | return gid; | |
684 | } else if ( | |
685 | info.standby_for_rank < 0 && info.standby_for_name.length() == 0 && | |
686 | (info.standby_for_fscid == FS_CLUSTER_ID_NONE || | |
687 | info.standby_for_fscid == role.fscid)) { | |
688 | // It's not a named standby for anyone, use it if we don't find | |
689 | // a named standby for me later, unless it targets another FSCID. | |
690 | result = gid; | |
691 | } | |
692 | } | |
693 | ||
694 | return result; | |
695 | } | |
696 | ||
31f18b77 FG |
697 | mds_gid_t FSMap::find_unused_for(mds_role_t role, |
698 | bool force_standby_active) const { | |
7c673cae FG |
699 | for (const auto &i : standby_daemons) { |
700 | const auto &gid = i.first; | |
701 | const auto &info = i.second; | |
702 | assert(info.state == MDSMap::STATE_STANDBY); | |
703 | ||
704 | if (info.laggy() || info.rank >= 0) | |
705 | continue; | |
706 | ||
707 | if (info.standby_for_fscid != FS_CLUSTER_ID_NONE && | |
31f18b77 FG |
708 | info.standby_for_fscid != role.fscid) |
709 | continue; | |
710 | if (info.standby_for_rank != MDS_RANK_NONE && | |
711 | info.standby_for_rank != role.rank) | |
7c673cae FG |
712 | continue; |
713 | ||
714 | // To be considered 'unused' a daemon must either not | |
715 | // be selected for standby-replay or the force_standby_active | |
716 | // setting must be enabled to use replay daemons anyway. | |
717 | if (!info.standby_replay || force_standby_active) { | |
718 | return gid; | |
719 | } | |
720 | } | |
721 | return MDS_GID_NONE; | |
722 | } | |
723 | ||
724 | mds_gid_t FSMap::find_replacement_for(mds_role_t role, const std::string& name, | |
725 | bool force_standby_active) const { | |
726 | const mds_gid_t standby = find_standby_for(role, name); | |
727 | if (standby) | |
728 | return standby; | |
729 | else | |
31f18b77 | 730 | return find_unused_for(role, force_standby_active); |
7c673cae FG |
731 | } |
732 | ||
733 | void FSMap::sanity() const | |
734 | { | |
735 | if (legacy_client_fscid != FS_CLUSTER_ID_NONE) { | |
736 | assert(filesystems.count(legacy_client_fscid) == 1); | |
737 | } | |
738 | ||
739 | for (const auto &i : filesystems) { | |
740 | auto fs = i.second; | |
741 | assert(fs->mds_map.compat.compare(compat) == 0); | |
742 | assert(fs->fscid == i.first); | |
743 | for (const auto &j : fs->mds_map.mds_info) { | |
744 | assert(j.second.rank != MDS_RANK_NONE); | |
745 | assert(mds_roles.count(j.first) == 1); | |
746 | assert(standby_daemons.count(j.first) == 0); | |
747 | assert(standby_epochs.count(j.first) == 0); | |
748 | assert(mds_roles.at(j.first) == i.first); | |
749 | if (j.second.state != MDSMap::STATE_STANDBY_REPLAY) { | |
750 | assert(fs->mds_map.up.at(j.second.rank) == j.first); | |
751 | assert(fs->mds_map.failed.count(j.second.rank) == 0); | |
752 | assert(fs->mds_map.damaged.count(j.second.rank) == 0); | |
753 | } | |
754 | } | |
755 | ||
756 | for (const auto &j : fs->mds_map.up) { | |
757 | mds_rank_t rank = j.first; | |
758 | assert(fs->mds_map.in.count(rank) == 1); | |
759 | mds_gid_t gid = j.second; | |
760 | assert(fs->mds_map.mds_info.count(gid) == 1); | |
761 | } | |
762 | } | |
763 | ||
764 | for (const auto &i : standby_daemons) { | |
765 | assert(i.second.state == MDSMap::STATE_STANDBY); | |
766 | assert(i.second.rank == MDS_RANK_NONE); | |
767 | assert(i.second.global_id == i.first); | |
768 | assert(standby_epochs.count(i.first) == 1); | |
769 | assert(mds_roles.count(i.first) == 1); | |
770 | assert(mds_roles.at(i.first) == FS_CLUSTER_ID_NONE); | |
771 | } | |
772 | ||
773 | for (const auto &i : standby_epochs) { | |
774 | assert(standby_daemons.count(i.first) == 1); | |
775 | } | |
776 | ||
777 | for (const auto &i : mds_roles) { | |
778 | if (i.second == FS_CLUSTER_ID_NONE) { | |
779 | assert(standby_daemons.count(i.first) == 1); | |
780 | } else { | |
781 | assert(filesystems.count(i.second) == 1); | |
782 | assert(filesystems.at(i.second)->mds_map.mds_info.count(i.first) == 1); | |
783 | } | |
784 | } | |
785 | } | |
786 | ||
787 | void FSMap::promote( | |
788 | mds_gid_t standby_gid, | |
789 | const std::shared_ptr<Filesystem> &filesystem, | |
790 | mds_rank_t assigned_rank) | |
791 | { | |
792 | assert(gid_exists(standby_gid)); | |
793 | bool is_standby_replay = mds_roles.at(standby_gid) != FS_CLUSTER_ID_NONE; | |
794 | if (!is_standby_replay) { | |
795 | assert(standby_daemons.count(standby_gid)); | |
796 | assert(standby_daemons.at(standby_gid).state == MDSMap::STATE_STANDBY); | |
797 | } | |
798 | ||
799 | MDSMap &mds_map = filesystem->mds_map; | |
800 | ||
801 | // Insert daemon state to Filesystem | |
802 | if (!is_standby_replay) { | |
803 | mds_map.mds_info[standby_gid] = standby_daemons.at(standby_gid); | |
804 | } else { | |
805 | assert(mds_map.mds_info.count(standby_gid)); | |
806 | assert(mds_map.mds_info.at(standby_gid).state == MDSMap::STATE_STANDBY_REPLAY); | |
807 | assert(mds_map.mds_info.at(standby_gid).rank == assigned_rank); | |
808 | } | |
809 | MDSMap::mds_info_t &info = mds_map.mds_info[standby_gid]; | |
810 | ||
811 | if (mds_map.stopped.erase(assigned_rank)) { | |
812 | // The cluster is being expanded with a stopped rank | |
813 | info.state = MDSMap::STATE_STARTING; | |
814 | } else if (!mds_map.is_in(assigned_rank)) { | |
815 | // The cluster is being expanded with a new rank | |
816 | info.state = MDSMap::STATE_CREATING; | |
817 | } else { | |
818 | // An existing rank is being assigned to a replacement | |
819 | info.state = MDSMap::STATE_REPLAY; | |
820 | mds_map.failed.erase(assigned_rank); | |
821 | } | |
822 | info.rank = assigned_rank; | |
823 | info.inc = epoch; | |
824 | mds_roles[standby_gid] = filesystem->fscid; | |
825 | ||
826 | // Update the rank state in Filesystem | |
827 | mds_map.in.insert(assigned_rank); | |
828 | mds_map.up[assigned_rank] = standby_gid; | |
829 | ||
830 | // Remove from the list of standbys | |
831 | if (!is_standby_replay) { | |
832 | standby_daemons.erase(standby_gid); | |
833 | standby_epochs.erase(standby_gid); | |
834 | } | |
835 | ||
836 | // Indicate that Filesystem has been modified | |
837 | mds_map.epoch = epoch; | |
838 | } | |
839 | ||
840 | void FSMap::assign_standby_replay( | |
841 | const mds_gid_t standby_gid, | |
842 | const fs_cluster_id_t leader_ns, | |
843 | const mds_rank_t leader_rank) | |
844 | { | |
845 | assert(mds_roles.at(standby_gid) == FS_CLUSTER_ID_NONE); | |
846 | assert(gid_exists(standby_gid)); | |
847 | assert(!gid_has_rank(standby_gid)); | |
848 | assert(standby_daemons.count(standby_gid)); | |
849 | ||
850 | // Insert to the filesystem | |
851 | auto fs = filesystems.at(leader_ns); | |
852 | fs->mds_map.mds_info[standby_gid] = standby_daemons.at(standby_gid); | |
853 | fs->mds_map.mds_info[standby_gid].rank = leader_rank; | |
854 | fs->mds_map.mds_info[standby_gid].state = MDSMap::STATE_STANDBY_REPLAY; | |
855 | mds_roles[standby_gid] = leader_ns; | |
856 | ||
857 | // Remove from the list of standbys | |
858 | standby_daemons.erase(standby_gid); | |
859 | standby_epochs.erase(standby_gid); | |
860 | ||
861 | // Indicate that Filesystem has been modified | |
862 | fs->mds_map.epoch = epoch; | |
863 | } | |
864 | ||
865 | void FSMap::erase(mds_gid_t who, epoch_t blacklist_epoch) | |
866 | { | |
867 | if (mds_roles.at(who) == FS_CLUSTER_ID_NONE) { | |
868 | standby_daemons.erase(who); | |
869 | standby_epochs.erase(who); | |
870 | } else { | |
871 | auto &fs = filesystems.at(mds_roles.at(who)); | |
872 | const auto &info = fs->mds_map.mds_info.at(who); | |
873 | if (info.state != MDSMap::STATE_STANDBY_REPLAY) { | |
874 | if (info.state == MDSMap::STATE_CREATING) { | |
875 | // If this gid didn't make it past CREATING, then forget | |
876 | // the rank ever existed so that next time it's handed out | |
877 | // to a gid it'll go back into CREATING. | |
878 | fs->mds_map.in.erase(info.rank); | |
879 | } else { | |
880 | // Put this rank into the failed list so that the next available | |
881 | // STANDBY will pick it up. | |
882 | fs->mds_map.failed.insert(info.rank); | |
883 | } | |
884 | assert(fs->mds_map.up.at(info.rank) == info.global_id); | |
885 | fs->mds_map.up.erase(info.rank); | |
886 | } | |
887 | fs->mds_map.mds_info.erase(who); | |
888 | fs->mds_map.last_failure_osd_epoch = blacklist_epoch; | |
889 | fs->mds_map.epoch = epoch; | |
890 | } | |
891 | ||
892 | mds_roles.erase(who); | |
893 | } | |
894 | ||
895 | void FSMap::damaged(mds_gid_t who, epoch_t blacklist_epoch) | |
896 | { | |
897 | assert(mds_roles.at(who) != FS_CLUSTER_ID_NONE); | |
898 | auto fs = filesystems.at(mds_roles.at(who)); | |
899 | mds_rank_t rank = fs->mds_map.mds_info[who].rank; | |
900 | ||
901 | erase(who, blacklist_epoch); | |
902 | fs->mds_map.failed.erase(rank); | |
903 | fs->mds_map.damaged.insert(rank); | |
904 | ||
905 | assert(fs->mds_map.epoch == epoch); | |
906 | } | |
907 | ||
908 | /** | |
909 | * Update to indicate that the rank `rank` is to be removed | |
910 | * from the damaged list of the filesystem `fscid` | |
911 | */ | |
912 | bool FSMap::undamaged(const fs_cluster_id_t fscid, const mds_rank_t rank) | |
913 | { | |
914 | auto fs = filesystems.at(fscid); | |
915 | ||
916 | if (fs->mds_map.damaged.erase(rank)) { | |
917 | fs->mds_map.failed.insert(rank); | |
918 | fs->mds_map.epoch = epoch; | |
919 | return true; | |
920 | } else { | |
921 | return false; | |
922 | } | |
923 | } | |
924 | ||
925 | void FSMap::insert(const MDSMap::mds_info_t &new_info) | |
926 | { | |
927 | assert(new_info.state == MDSMap::STATE_STANDBY); | |
928 | assert(new_info.rank == MDS_RANK_NONE); | |
929 | mds_roles[new_info.global_id] = FS_CLUSTER_ID_NONE; | |
930 | standby_daemons[new_info.global_id] = new_info; | |
931 | standby_epochs[new_info.global_id] = epoch; | |
932 | } | |
933 | ||
934 | std::list<mds_gid_t> FSMap::stop(mds_gid_t who) | |
935 | { | |
936 | assert(mds_roles.at(who) != FS_CLUSTER_ID_NONE); | |
937 | auto fs = filesystems.at(mds_roles.at(who)); | |
938 | const auto &info = fs->mds_map.mds_info.at(who); | |
939 | fs->mds_map.up.erase(info.rank); | |
940 | fs->mds_map.in.erase(info.rank); | |
941 | fs->mds_map.stopped.insert(info.rank); | |
942 | ||
943 | // Also drop any standby replays that were following this rank | |
944 | std::list<mds_gid_t> standbys; | |
945 | for (const auto &i : fs->mds_map.mds_info) { | |
946 | const auto &other_gid = i.first; | |
947 | const auto &other_info = i.second; | |
948 | if (other_info.rank == info.rank | |
949 | && other_info.state == MDSMap::STATE_STANDBY_REPLAY) { | |
950 | standbys.push_back(other_gid); | |
951 | erase(other_gid, 0); | |
952 | } | |
953 | } | |
954 | ||
955 | fs->mds_map.mds_info.erase(who); | |
956 | mds_roles.erase(who); | |
957 | ||
958 | fs->mds_map.epoch = epoch; | |
959 | ||
960 | return standbys; | |
961 | } | |
962 | ||
963 | ||
964 | /** | |
965 | * Given one of the following forms: | |
966 | * <fs name>:<rank> | |
967 | * <fs id>:<rank> | |
968 | * <rank> | |
969 | * | |
970 | * Parse into a mds_role_t. The rank-only form is only valid | |
971 | * if legacy_client_ns is set. | |
972 | */ | |
973 | int FSMap::parse_role( | |
974 | const std::string &role_str, | |
975 | mds_role_t *role, | |
976 | std::ostream &ss) const | |
977 | { | |
978 | size_t colon_pos = role_str.find(":"); | |
979 | size_t rank_pos; | |
980 | std::shared_ptr<const Filesystem> fs; | |
981 | if (colon_pos == std::string::npos) { | |
982 | if (legacy_client_fscid == FS_CLUSTER_ID_NONE) { | |
983 | ss << "No filesystem selected"; | |
984 | return -ENOENT; | |
985 | } | |
986 | fs = get_filesystem(legacy_client_fscid); | |
987 | rank_pos = 0; | |
988 | } else { | |
989 | if (parse_filesystem(role_str.substr(0, colon_pos), &fs) < 0) { | |
990 | ss << "Invalid filesystem"; | |
991 | return -ENOENT; | |
992 | } | |
993 | rank_pos = colon_pos+1; | |
994 | } | |
995 | ||
996 | mds_rank_t rank; | |
997 | std::string err; | |
998 | std::string rank_str = role_str.substr(rank_pos); | |
999 | long rank_i = strict_strtol(rank_str.c_str(), 10, &err); | |
1000 | if (rank_i < 0 || !err.empty()) { | |
1001 | ss << "Invalid rank '" << rank_str << "'"; | |
1002 | return -EINVAL; | |
1003 | } else { | |
1004 | rank = rank_i; | |
1005 | } | |
1006 | ||
1007 | if (fs->mds_map.in.count(rank) == 0) { | |
1008 | ss << "Rank '" << rank << "' not found"; | |
1009 | return -ENOENT; | |
1010 | } | |
1011 | ||
1012 | *role = {fs->fscid, rank}; | |
1013 | ||
1014 | return 0; | |
1015 | } |