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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 | ||
21 | #include "mon/health_check.h" | |
22 | ||
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 { | |
129 | if (filesystems.size() == 1) { | |
130 | auto fs = filesystems.begin()->second; | |
131 | *out << fs->mds_map.up.size() << "/" << fs->mds_map.in.size() << "/" | |
132 | << fs->mds_map.max_mds << " up"; | |
133 | } else { | |
134 | for (auto i : filesystems) { | |
135 | auto fs = i.second; | |
136 | *out << fs->mds_map.fs_name << "-" << fs->mds_map.up.size() << "/" | |
137 | << fs->mds_map.in.size() << "/" << fs->mds_map.max_mds << " up "; | |
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; | |
241 | fs->mds_map.data_pools.push_back(data_pool); | |
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 | // Remember mds ranks that have ever started. (They should load old inotable | |
299 | // instead of creating new one if they start again.) | |
300 | new_fs->mds_map.stopped.insert(fs->mds_map.in.begin(), fs->mds_map.in.end()); | |
301 | new_fs->mds_map.stopped.insert(fs->mds_map.stopped.begin(), fs->mds_map.stopped.end()); | |
302 | new_fs->mds_map.stopped.erase(mds_rank_t(0)); | |
303 | ||
304 | // Persist the new FSMap | |
305 | filesystems[new_fs->fscid] = new_fs; | |
306 | } | |
307 | ||
308 | void FSMap::get_health(list<pair<health_status_t,string> >& summary, | |
309 | list<pair<health_status_t,string> > *detail) const | |
310 | { | |
311 | mds_rank_t standby_count_wanted = 0; | |
312 | for (const auto &i : filesystems) { | |
313 | const auto &fs = i.second; | |
314 | ||
315 | // TODO: move get_health up into here so that we can qualify | |
316 | // all the messages with what filesystem they're talking about | |
317 | fs->mds_map.get_health(summary, detail); | |
318 | ||
319 | standby_count_wanted = std::max(standby_count_wanted, fs->mds_map.get_standby_count_wanted((mds_rank_t)standby_daemons.size())); | |
320 | } | |
321 | ||
322 | if (standby_count_wanted) { | |
323 | std::ostringstream oss; | |
324 | oss << "insufficient standby daemons available: have " << standby_daemons.size() << "; want " << standby_count_wanted << " more"; | |
325 | summary.push_back(make_pair(HEALTH_WARN, oss.str())); | |
326 | } | |
327 | } | |
328 | ||
329 | bool FSMap::check_health(void) | |
330 | { | |
331 | bool changed = false; | |
332 | for (auto &i : filesystems) { | |
333 | changed |= i.second->mds_map.check_health((mds_rank_t)standby_daemons.size()); | |
334 | } | |
335 | return changed; | |
336 | } | |
337 | ||
338 | void FSMap::get_health_checks(health_check_map_t *checks) const | |
339 | { | |
340 | mds_rank_t standby_count_wanted = 0; | |
341 | for (const auto &i : filesystems) { | |
342 | const auto &fs = i.second; | |
343 | health_check_map_t fschecks; | |
344 | fs->mds_map.get_health_checks(&fschecks); | |
345 | checks->merge(fschecks); | |
346 | standby_count_wanted = std::max( | |
347 | standby_count_wanted, | |
348 | fs->mds_map.get_standby_count_wanted((mds_rank_t)standby_daemons.size())); | |
349 | } | |
350 | ||
351 | // MDS_INSUFFICIENT_STANDBY | |
352 | if (standby_count_wanted) { | |
353 | std::ostringstream oss, dss; | |
354 | oss << "insufficient standby daemons available"; | |
355 | auto& d = checks->add("MDS_INSUFFICIENT_STANDBY", HEALTH_WARN, oss.str()); | |
356 | dss << "have " << standby_daemons.size() << "; want " << standby_count_wanted | |
357 | << " more"; | |
358 | d.detail.push_back(dss.str()); | |
359 | } | |
360 | } | |
361 | ||
362 | void FSMap::encode(bufferlist& bl, uint64_t features) const | |
363 | { | |
364 | if (features & CEPH_FEATURE_SERVER_JEWEL) { | |
365 | ENCODE_START(7, 6, bl); | |
366 | ::encode(epoch, bl); | |
367 | ::encode(next_filesystem_id, bl); | |
368 | ::encode(legacy_client_fscid, bl); | |
369 | ::encode(compat, bl); | |
370 | ::encode(enable_multiple, bl); | |
371 | std::vector<Filesystem> fs_list; | |
372 | for (auto i : filesystems) { | |
373 | fs_list.push_back(*(i.second)); | |
374 | } | |
375 | ::encode(fs_list, bl, features); | |
376 | ::encode(mds_roles, bl); | |
377 | ::encode(standby_daemons, bl, features); | |
378 | ::encode(standby_epochs, bl); | |
379 | ::encode(ever_enabled_multiple, bl); | |
380 | ENCODE_FINISH(bl); | |
381 | } else { | |
382 | if (filesystems.empty()) { | |
383 | MDSMap disabled_map; | |
384 | disabled_map.epoch = epoch; | |
385 | disabled_map.encode(bl, features); | |
386 | } else { | |
387 | // MDSMonitor should never have created multiple filesystems | |
388 | // until the quorum features indicated Jewel | |
389 | assert(filesystems.size() == 1); | |
390 | auto fs = filesystems.begin()->second; | |
391 | ||
392 | // Take the MDSMap for the enabled filesystem, and populated its | |
393 | // mds_info with the standbys to get a pre-jewel-style mon MDSMap. | |
394 | MDSMap full_mdsmap = fs->mds_map; | |
395 | full_mdsmap.epoch = epoch; | |
396 | for (const auto &p : standby_daemons) { | |
397 | full_mdsmap.mds_info[p.first] = p.second; | |
398 | } | |
399 | ||
400 | // Old MDSMaps don't set rank on standby replay daemons | |
401 | for (auto &i : full_mdsmap.mds_info) { | |
402 | auto &info = i.second; | |
403 | if (info.state == MDSMap::STATE_STANDBY_REPLAY) { | |
404 | info.rank = MDS_RANK_NONE; | |
405 | } | |
406 | } | |
407 | ||
408 | full_mdsmap.encode(bl, features); | |
409 | } | |
410 | } | |
411 | } | |
412 | ||
413 | void FSMap::decode(bufferlist::iterator& p) | |
414 | { | |
415 | // Because the mon used to store an MDSMap where we now | |
416 | // store an FSMap, FSMap knows how to decode the legacy | |
417 | // MDSMap format (it never needs to encode it though). | |
418 | MDSMap legacy_mds_map; | |
419 | ||
420 | // The highest MDSMap encoding version before we changed the | |
421 | // MDSMonitor to store an FSMap instead of an MDSMap was | |
422 | // 5, so anything older than 6 is decoded as an MDSMap, | |
423 | // and anything newer is decoded as an FSMap. | |
424 | DECODE_START_LEGACY_COMPAT_LEN_16(7, 4, 4, p); | |
425 | if (struct_v < 6) { | |
426 | // Decoding an MDSMap (upgrade) | |
427 | ::decode(epoch, p); | |
428 | ::decode(legacy_mds_map.flags, p); | |
429 | ::decode(legacy_mds_map.last_failure, p); | |
430 | ::decode(legacy_mds_map.root, p); | |
431 | ::decode(legacy_mds_map.session_timeout, p); | |
432 | ::decode(legacy_mds_map.session_autoclose, p); | |
433 | ::decode(legacy_mds_map.max_file_size, p); | |
434 | ::decode(legacy_mds_map.max_mds, p); | |
435 | ::decode(legacy_mds_map.mds_info, p); | |
436 | if (struct_v < 3) { | |
437 | __u32 n; | |
438 | ::decode(n, p); | |
439 | while (n--) { | |
440 | __u32 m; | |
441 | ::decode(m, p); | |
442 | legacy_mds_map.data_pools.push_back(m); | |
443 | } | |
444 | __s32 s; | |
445 | ::decode(s, p); | |
446 | legacy_mds_map.cas_pool = s; | |
447 | } else { | |
448 | ::decode(legacy_mds_map.data_pools, p); | |
449 | ::decode(legacy_mds_map.cas_pool, p); | |
450 | } | |
451 | ||
452 | // kclient ignores everything from here | |
453 | __u16 ev = 1; | |
454 | if (struct_v >= 2) | |
455 | ::decode(ev, p); | |
456 | if (ev >= 3) | |
457 | ::decode(legacy_mds_map.compat, p); | |
458 | else | |
459 | legacy_mds_map.compat = get_mdsmap_compat_set_base(); | |
460 | if (ev < 5) { | |
461 | __u32 n; | |
462 | ::decode(n, p); | |
463 | legacy_mds_map.metadata_pool = n; | |
464 | } else { | |
465 | ::decode(legacy_mds_map.metadata_pool, p); | |
466 | } | |
467 | ::decode(legacy_mds_map.created, p); | |
468 | ::decode(legacy_mds_map.modified, p); | |
469 | ::decode(legacy_mds_map.tableserver, p); | |
470 | ::decode(legacy_mds_map.in, p); | |
471 | std::map<mds_rank_t,int32_t> inc; // Legacy field, parse and drop | |
472 | ::decode(inc, p); | |
473 | ::decode(legacy_mds_map.up, p); | |
474 | ::decode(legacy_mds_map.failed, p); | |
475 | ::decode(legacy_mds_map.stopped, p); | |
476 | if (ev >= 4) | |
477 | ::decode(legacy_mds_map.last_failure_osd_epoch, p); | |
478 | if (ev >= 6) { | |
479 | if (ev < 10) { | |
480 | // previously this was a bool about snaps, not a flag map | |
481 | bool flag; | |
482 | ::decode(flag, p); | |
483 | legacy_mds_map.ever_allowed_features = flag ? | |
484 | CEPH_MDSMAP_ALLOW_SNAPS : 0; | |
485 | ::decode(flag, p); | |
486 | legacy_mds_map.explicitly_allowed_features = flag ? | |
487 | CEPH_MDSMAP_ALLOW_SNAPS : 0; | |
488 | if (legacy_mds_map.max_mds > 1) { | |
489 | legacy_mds_map.set_multimds_allowed(); | |
490 | } | |
491 | } else { | |
492 | ::decode(legacy_mds_map.ever_allowed_features, p); | |
493 | ::decode(legacy_mds_map.explicitly_allowed_features, p); | |
494 | } | |
495 | } else { | |
496 | legacy_mds_map.ever_allowed_features = CEPH_MDSMAP_ALLOW_CLASSICS; | |
497 | legacy_mds_map.explicitly_allowed_features = 0; | |
498 | if (legacy_mds_map.max_mds > 1) { | |
499 | legacy_mds_map.set_multimds_allowed(); | |
500 | } | |
501 | } | |
502 | if (ev >= 7) | |
503 | ::decode(legacy_mds_map.inline_data_enabled, p); | |
504 | ||
505 | if (ev >= 8) { | |
506 | assert(struct_v >= 5); | |
507 | ::decode(legacy_mds_map.enabled, p); | |
508 | ::decode(legacy_mds_map.fs_name, p); | |
509 | } else { | |
510 | legacy_mds_map.fs_name = "default"; | |
511 | if (epoch > 1) { | |
512 | // If an MDS has ever been started, epoch will be greater than 1, | |
513 | // assume filesystem is enabled. | |
514 | legacy_mds_map.enabled = true; | |
515 | } else { | |
516 | // Upgrading from a cluster that never used an MDS, switch off | |
517 | // filesystem until it's explicitly enabled. | |
518 | legacy_mds_map.enabled = false; | |
519 | } | |
520 | } | |
521 | ||
522 | if (ev >= 9) { | |
523 | ::decode(legacy_mds_map.damaged, p); | |
524 | } | |
525 | ||
526 | // We're upgrading, populate filesystems from the legacy fields | |
527 | filesystems.clear(); | |
528 | standby_daemons.clear(); | |
529 | standby_epochs.clear(); | |
530 | mds_roles.clear(); | |
531 | compat = legacy_mds_map.compat; | |
532 | enable_multiple = false; | |
533 | ||
534 | // Synthesise a Filesystem from legacy_mds_map, if enabled | |
535 | if (legacy_mds_map.enabled) { | |
536 | // Construct a Filesystem from the legacy MDSMap | |
537 | auto migrate_fs = std::make_shared<Filesystem>(); | |
538 | migrate_fs->fscid = FS_CLUSTER_ID_ANONYMOUS; | |
539 | migrate_fs->mds_map = legacy_mds_map; | |
540 | migrate_fs->mds_map.epoch = epoch; | |
541 | filesystems[migrate_fs->fscid] = migrate_fs; | |
542 | ||
543 | // List of GIDs that had invalid states | |
544 | std::set<mds_gid_t> drop_gids; | |
545 | ||
546 | // Construct mds_roles, standby_daemons, and remove | |
547 | // standbys from the MDSMap in the Filesystem. | |
548 | for (auto &p : migrate_fs->mds_map.mds_info) { | |
549 | if (p.second.state == MDSMap::STATE_STANDBY_REPLAY) { | |
550 | // In legacy MDSMap, standby replay daemons don't have | |
551 | // rank set, but since FSMap they do. | |
552 | p.second.rank = p.second.standby_for_rank; | |
553 | } | |
554 | if (p.second.rank == MDS_RANK_NONE) { | |
555 | if (p.second.state != MDSMap::STATE_STANDBY) { | |
556 | // Old MDSMaps can have down:dne here, which | |
557 | // is invalid in an FSMap (#17837) | |
558 | drop_gids.insert(p.first); | |
559 | } else { | |
560 | insert(p.second); // into standby_daemons | |
561 | } | |
562 | } else { | |
563 | mds_roles[p.first] = migrate_fs->fscid; | |
564 | } | |
565 | } | |
566 | for (const auto &p : standby_daemons) { | |
567 | // Erase from this Filesystem's MDSMap, because it has | |
568 | // been copied into FSMap::Standby_daemons above | |
569 | migrate_fs->mds_map.mds_info.erase(p.first); | |
570 | } | |
571 | for (const auto &gid : drop_gids) { | |
572 | // Throw away all info for this MDS because it was identified | |
573 | // as having invalid state above. | |
574 | migrate_fs->mds_map.mds_info.erase(gid); | |
575 | } | |
576 | ||
577 | legacy_client_fscid = migrate_fs->fscid; | |
578 | } else { | |
579 | legacy_client_fscid = FS_CLUSTER_ID_NONE; | |
580 | } | |
581 | } else { | |
582 | ::decode(epoch, p); | |
583 | ::decode(next_filesystem_id, p); | |
584 | ::decode(legacy_client_fscid, p); | |
585 | ::decode(compat, p); | |
586 | ::decode(enable_multiple, p); | |
587 | std::vector<Filesystem> fs_list; | |
588 | ::decode(fs_list, p); | |
589 | filesystems.clear(); | |
590 | for (std::vector<Filesystem>::const_iterator fs = fs_list.begin(); fs != fs_list.end(); ++fs) { | |
591 | filesystems[fs->fscid] = std::make_shared<Filesystem>(*fs); | |
592 | } | |
593 | ||
594 | ::decode(mds_roles, p); | |
595 | ::decode(standby_daemons, p); | |
596 | ::decode(standby_epochs, p); | |
597 | if (struct_v >= 7) { | |
598 | ::decode(ever_enabled_multiple, p); | |
599 | } | |
600 | } | |
601 | ||
602 | DECODE_FINISH(p); | |
603 | } | |
604 | ||
605 | ||
606 | void Filesystem::encode(bufferlist& bl, uint64_t features) const | |
607 | { | |
608 | ENCODE_START(1, 1, bl); | |
609 | ::encode(fscid, bl); | |
610 | bufferlist mdsmap_bl; | |
611 | mds_map.encode(mdsmap_bl, features); | |
612 | ::encode(mdsmap_bl, bl); | |
613 | ENCODE_FINISH(bl); | |
614 | } | |
615 | ||
616 | void Filesystem::decode(bufferlist::iterator& p) | |
617 | { | |
618 | DECODE_START(1, p); | |
619 | ::decode(fscid, p); | |
620 | bufferlist mdsmap_bl; | |
621 | ::decode(mdsmap_bl, p); | |
622 | bufferlist::iterator mdsmap_bl_iter = mdsmap_bl.begin(); | |
623 | mds_map.decode(mdsmap_bl_iter); | |
624 | DECODE_FINISH(p); | |
625 | } | |
626 | ||
627 | int FSMap::parse_filesystem( | |
628 | std::string const &ns_str, | |
629 | std::shared_ptr<const Filesystem> *result | |
630 | ) const | |
631 | { | |
632 | std::string ns_err; | |
633 | fs_cluster_id_t fscid = strict_strtol(ns_str.c_str(), 10, &ns_err); | |
634 | if (!ns_err.empty() || filesystems.count(fscid) == 0) { | |
635 | for (auto &fs : filesystems) { | |
636 | if (fs.second->mds_map.fs_name == ns_str) { | |
637 | *result = std::const_pointer_cast<const Filesystem>(fs.second); | |
638 | return 0; | |
639 | } | |
640 | } | |
641 | return -ENOENT; | |
642 | } else { | |
643 | *result = get_filesystem(fscid); | |
644 | return 0; | |
645 | } | |
646 | } | |
647 | ||
648 | void Filesystem::print(std::ostream &out) const | |
649 | { | |
650 | out << "Filesystem '" << mds_map.fs_name | |
651 | << "' (" << fscid << ")" << std::endl; | |
652 | mds_map.print(out); | |
653 | } | |
654 | ||
655 | mds_gid_t FSMap::find_standby_for(mds_role_t role, const std::string& name) const | |
656 | { | |
657 | mds_gid_t result = MDS_GID_NONE; | |
658 | ||
659 | // First see if we have a STANDBY_REPLAY | |
660 | auto fs = get_filesystem(role.fscid); | |
661 | for (const auto &i : fs->mds_map.mds_info) { | |
662 | const auto &info = i.second; | |
663 | if (info.rank == role.rank && info.state == MDSMap::STATE_STANDBY_REPLAY) { | |
664 | return info.global_id; | |
665 | } | |
666 | } | |
667 | ||
668 | // See if there are any STANDBY daemons available | |
669 | for (const auto &i : standby_daemons) { | |
670 | const auto &gid = i.first; | |
671 | const auto &info = i.second; | |
672 | assert(info.state == MDSMap::STATE_STANDBY); | |
673 | assert(info.rank == MDS_RANK_NONE); | |
674 | ||
675 | if (info.laggy()) { | |
676 | continue; | |
677 | } | |
678 | ||
679 | // The mds_info_t may or may not tell us exactly which filesystem | |
680 | // the standby_for_rank refers to: lookup via legacy_client_fscid | |
681 | mds_role_t target_role = { | |
682 | info.standby_for_fscid == FS_CLUSTER_ID_NONE ? | |
683 | legacy_client_fscid : info.standby_for_fscid, | |
684 | info.standby_for_rank}; | |
685 | ||
686 | if ((target_role.rank == role.rank && target_role.fscid == role.fscid) | |
687 | || (name.length() && info.standby_for_name == name)) { | |
688 | // It's a named standby for *me*, use it. | |
689 | return gid; | |
690 | } else if ( | |
691 | info.standby_for_rank < 0 && info.standby_for_name.length() == 0 && | |
692 | (info.standby_for_fscid == FS_CLUSTER_ID_NONE || | |
693 | info.standby_for_fscid == role.fscid)) { | |
694 | // It's not a named standby for anyone, use it if we don't find | |
695 | // a named standby for me later, unless it targets another FSCID. | |
696 | result = gid; | |
697 | } | |
698 | } | |
699 | ||
700 | return result; | |
701 | } | |
702 | ||
703 | mds_gid_t FSMap::find_unused_for(mds_role_t role, | |
704 | bool force_standby_active) const { | |
705 | for (const auto &i : standby_daemons) { | |
706 | const auto &gid = i.first; | |
707 | const auto &info = i.second; | |
708 | assert(info.state == MDSMap::STATE_STANDBY); | |
709 | ||
710 | if (info.laggy() || info.rank >= 0) | |
711 | continue; | |
712 | ||
713 | if (info.standby_for_fscid != FS_CLUSTER_ID_NONE && | |
714 | info.standby_for_fscid != role.fscid) | |
715 | continue; | |
716 | if (info.standby_for_rank != MDS_RANK_NONE && | |
717 | info.standby_for_rank != role.rank) | |
718 | continue; | |
719 | ||
720 | // To be considered 'unused' a daemon must either not | |
721 | // be selected for standby-replay or the force_standby_active | |
722 | // setting must be enabled to use replay daemons anyway. | |
723 | if (!info.standby_replay || force_standby_active) { | |
724 | return gid; | |
725 | } | |
726 | } | |
727 | return MDS_GID_NONE; | |
728 | } | |
729 | ||
730 | mds_gid_t FSMap::find_replacement_for(mds_role_t role, const std::string& name, | |
731 | bool force_standby_active) const { | |
732 | const mds_gid_t standby = find_standby_for(role, name); | |
733 | if (standby) | |
734 | return standby; | |
735 | else | |
736 | return find_unused_for(role, force_standby_active); | |
737 | } | |
738 | ||
739 | void FSMap::sanity() const | |
740 | { | |
741 | if (legacy_client_fscid != FS_CLUSTER_ID_NONE) { | |
742 | assert(filesystems.count(legacy_client_fscid) == 1); | |
743 | } | |
744 | ||
745 | for (const auto &i : filesystems) { | |
746 | auto fs = i.second; | |
747 | assert(fs->mds_map.compat.compare(compat) == 0); | |
748 | assert(fs->fscid == i.first); | |
749 | for (const auto &j : fs->mds_map.mds_info) { | |
750 | assert(j.second.rank != MDS_RANK_NONE); | |
751 | assert(mds_roles.count(j.first) == 1); | |
752 | assert(standby_daemons.count(j.first) == 0); | |
753 | assert(standby_epochs.count(j.first) == 0); | |
754 | assert(mds_roles.at(j.first) == i.first); | |
755 | if (j.second.state != MDSMap::STATE_STANDBY_REPLAY) { | |
756 | assert(fs->mds_map.up.at(j.second.rank) == j.first); | |
757 | assert(fs->mds_map.failed.count(j.second.rank) == 0); | |
758 | assert(fs->mds_map.damaged.count(j.second.rank) == 0); | |
759 | } | |
760 | } | |
761 | ||
762 | for (const auto &j : fs->mds_map.up) { | |
763 | mds_rank_t rank = j.first; | |
764 | assert(fs->mds_map.in.count(rank) == 1); | |
765 | mds_gid_t gid = j.second; | |
766 | assert(fs->mds_map.mds_info.count(gid) == 1); | |
767 | } | |
768 | } | |
769 | ||
770 | for (const auto &i : standby_daemons) { | |
771 | assert(i.second.state == MDSMap::STATE_STANDBY); | |
772 | assert(i.second.rank == MDS_RANK_NONE); | |
773 | assert(i.second.global_id == i.first); | |
774 | assert(standby_epochs.count(i.first) == 1); | |
775 | assert(mds_roles.count(i.first) == 1); | |
776 | assert(mds_roles.at(i.first) == FS_CLUSTER_ID_NONE); | |
777 | } | |
778 | ||
779 | for (const auto &i : standby_epochs) { | |
780 | assert(standby_daemons.count(i.first) == 1); | |
781 | } | |
782 | ||
783 | for (const auto &i : mds_roles) { | |
784 | if (i.second == FS_CLUSTER_ID_NONE) { | |
785 | assert(standby_daemons.count(i.first) == 1); | |
786 | } else { | |
787 | assert(filesystems.count(i.second) == 1); | |
788 | assert(filesystems.at(i.second)->mds_map.mds_info.count(i.first) == 1); | |
789 | } | |
790 | } | |
791 | } | |
792 | ||
793 | void FSMap::promote( | |
794 | mds_gid_t standby_gid, | |
795 | const std::shared_ptr<Filesystem> &filesystem, | |
796 | mds_rank_t assigned_rank) | |
797 | { | |
798 | assert(gid_exists(standby_gid)); | |
799 | bool is_standby_replay = mds_roles.at(standby_gid) != FS_CLUSTER_ID_NONE; | |
800 | if (!is_standby_replay) { | |
801 | assert(standby_daemons.count(standby_gid)); | |
802 | assert(standby_daemons.at(standby_gid).state == MDSMap::STATE_STANDBY); | |
803 | } | |
804 | ||
805 | MDSMap &mds_map = filesystem->mds_map; | |
806 | ||
807 | // Insert daemon state to Filesystem | |
808 | if (!is_standby_replay) { | |
809 | mds_map.mds_info[standby_gid] = standby_daemons.at(standby_gid); | |
810 | } else { | |
811 | assert(mds_map.mds_info.count(standby_gid)); | |
812 | assert(mds_map.mds_info.at(standby_gid).state == MDSMap::STATE_STANDBY_REPLAY); | |
813 | assert(mds_map.mds_info.at(standby_gid).rank == assigned_rank); | |
814 | } | |
815 | MDSMap::mds_info_t &info = mds_map.mds_info[standby_gid]; | |
816 | ||
817 | if (mds_map.stopped.erase(assigned_rank)) { | |
818 | // The cluster is being expanded with a stopped rank | |
819 | info.state = MDSMap::STATE_STARTING; | |
820 | } else if (!mds_map.is_in(assigned_rank)) { | |
821 | // The cluster is being expanded with a new rank | |
822 | info.state = MDSMap::STATE_CREATING; | |
823 | } else { | |
824 | // An existing rank is being assigned to a replacement | |
825 | info.state = MDSMap::STATE_REPLAY; | |
826 | mds_map.failed.erase(assigned_rank); | |
827 | } | |
828 | info.rank = assigned_rank; | |
829 | info.inc = epoch; | |
830 | mds_roles[standby_gid] = filesystem->fscid; | |
831 | ||
832 | // Update the rank state in Filesystem | |
833 | mds_map.in.insert(assigned_rank); | |
834 | mds_map.up[assigned_rank] = standby_gid; | |
835 | ||
836 | // Remove from the list of standbys | |
837 | if (!is_standby_replay) { | |
838 | standby_daemons.erase(standby_gid); | |
839 | standby_epochs.erase(standby_gid); | |
840 | } | |
841 | ||
842 | // Indicate that Filesystem has been modified | |
843 | mds_map.epoch = epoch; | |
844 | } | |
845 | ||
846 | void FSMap::assign_standby_replay( | |
847 | const mds_gid_t standby_gid, | |
848 | const fs_cluster_id_t leader_ns, | |
849 | const mds_rank_t leader_rank) | |
850 | { | |
851 | assert(mds_roles.at(standby_gid) == FS_CLUSTER_ID_NONE); | |
852 | assert(gid_exists(standby_gid)); | |
853 | assert(!gid_has_rank(standby_gid)); | |
854 | assert(standby_daemons.count(standby_gid)); | |
855 | ||
856 | // Insert to the filesystem | |
857 | auto fs = filesystems.at(leader_ns); | |
858 | fs->mds_map.mds_info[standby_gid] = standby_daemons.at(standby_gid); | |
859 | fs->mds_map.mds_info[standby_gid].rank = leader_rank; | |
860 | fs->mds_map.mds_info[standby_gid].state = MDSMap::STATE_STANDBY_REPLAY; | |
861 | mds_roles[standby_gid] = leader_ns; | |
862 | ||
863 | // Remove from the list of standbys | |
864 | standby_daemons.erase(standby_gid); | |
865 | standby_epochs.erase(standby_gid); | |
866 | ||
867 | // Indicate that Filesystem has been modified | |
868 | fs->mds_map.epoch = epoch; | |
869 | } | |
870 | ||
871 | void FSMap::erase(mds_gid_t who, epoch_t blacklist_epoch) | |
872 | { | |
873 | if (mds_roles.at(who) == FS_CLUSTER_ID_NONE) { | |
874 | standby_daemons.erase(who); | |
875 | standby_epochs.erase(who); | |
876 | } else { | |
877 | auto &fs = filesystems.at(mds_roles.at(who)); | |
878 | const auto &info = fs->mds_map.mds_info.at(who); | |
879 | if (info.state != MDSMap::STATE_STANDBY_REPLAY) { | |
880 | if (info.state == MDSMap::STATE_CREATING) { | |
881 | // If this gid didn't make it past CREATING, then forget | |
882 | // the rank ever existed so that next time it's handed out | |
883 | // to a gid it'll go back into CREATING. | |
884 | fs->mds_map.in.erase(info.rank); | |
885 | } else { | |
886 | // Put this rank into the failed list so that the next available | |
887 | // STANDBY will pick it up. | |
888 | fs->mds_map.failed.insert(info.rank); | |
889 | } | |
890 | assert(fs->mds_map.up.at(info.rank) == info.global_id); | |
891 | fs->mds_map.up.erase(info.rank); | |
892 | } | |
893 | fs->mds_map.mds_info.erase(who); | |
894 | fs->mds_map.last_failure_osd_epoch = blacklist_epoch; | |
895 | fs->mds_map.epoch = epoch; | |
896 | } | |
897 | ||
898 | mds_roles.erase(who); | |
899 | } | |
900 | ||
901 | void FSMap::damaged(mds_gid_t who, epoch_t blacklist_epoch) | |
902 | { | |
903 | assert(mds_roles.at(who) != FS_CLUSTER_ID_NONE); | |
904 | auto fs = filesystems.at(mds_roles.at(who)); | |
905 | mds_rank_t rank = fs->mds_map.mds_info[who].rank; | |
906 | ||
907 | erase(who, blacklist_epoch); | |
908 | fs->mds_map.failed.erase(rank); | |
909 | fs->mds_map.damaged.insert(rank); | |
910 | ||
911 | assert(fs->mds_map.epoch == epoch); | |
912 | } | |
913 | ||
914 | /** | |
915 | * Update to indicate that the rank `rank` is to be removed | |
916 | * from the damaged list of the filesystem `fscid` | |
917 | */ | |
918 | bool FSMap::undamaged(const fs_cluster_id_t fscid, const mds_rank_t rank) | |
919 | { | |
920 | auto fs = filesystems.at(fscid); | |
921 | ||
922 | if (fs->mds_map.damaged.erase(rank)) { | |
923 | fs->mds_map.failed.insert(rank); | |
924 | fs->mds_map.epoch = epoch; | |
925 | return true; | |
926 | } else { | |
927 | return false; | |
928 | } | |
929 | } | |
930 | ||
931 | void FSMap::insert(const MDSMap::mds_info_t &new_info) | |
932 | { | |
933 | assert(new_info.state == MDSMap::STATE_STANDBY); | |
934 | assert(new_info.rank == MDS_RANK_NONE); | |
935 | mds_roles[new_info.global_id] = FS_CLUSTER_ID_NONE; | |
936 | standby_daemons[new_info.global_id] = new_info; | |
937 | standby_epochs[new_info.global_id] = epoch; | |
938 | } | |
939 | ||
940 | std::list<mds_gid_t> FSMap::stop(mds_gid_t who) | |
941 | { | |
942 | assert(mds_roles.at(who) != FS_CLUSTER_ID_NONE); | |
943 | auto fs = filesystems.at(mds_roles.at(who)); | |
944 | const auto &info = fs->mds_map.mds_info.at(who); | |
945 | fs->mds_map.up.erase(info.rank); | |
946 | fs->mds_map.in.erase(info.rank); | |
947 | fs->mds_map.stopped.insert(info.rank); | |
948 | ||
949 | // Also drop any standby replays that were following this rank | |
950 | std::list<mds_gid_t> standbys; | |
951 | for (const auto &i : fs->mds_map.mds_info) { | |
952 | const auto &other_gid = i.first; | |
953 | const auto &other_info = i.second; | |
954 | if (other_info.rank == info.rank | |
955 | && other_info.state == MDSMap::STATE_STANDBY_REPLAY) { | |
956 | standbys.push_back(other_gid); | |
957 | erase(other_gid, 0); | |
958 | } | |
959 | } | |
960 | ||
961 | fs->mds_map.mds_info.erase(who); | |
962 | mds_roles.erase(who); | |
963 | ||
964 | fs->mds_map.epoch = epoch; | |
965 | ||
966 | return standbys; | |
967 | } | |
968 | ||
969 | ||
970 | /** | |
971 | * Given one of the following forms: | |
972 | * <fs name>:<rank> | |
973 | * <fs id>:<rank> | |
974 | * <rank> | |
975 | * | |
976 | * Parse into a mds_role_t. The rank-only form is only valid | |
977 | * if legacy_client_ns is set. | |
978 | */ | |
979 | int FSMap::parse_role( | |
980 | const std::string &role_str, | |
981 | mds_role_t *role, | |
982 | std::ostream &ss) const | |
983 | { | |
984 | size_t colon_pos = role_str.find(":"); | |
985 | size_t rank_pos; | |
986 | std::shared_ptr<const Filesystem> fs; | |
987 | if (colon_pos == std::string::npos) { | |
988 | if (legacy_client_fscid == FS_CLUSTER_ID_NONE) { | |
989 | ss << "No filesystem selected"; | |
990 | return -ENOENT; | |
991 | } | |
992 | fs = get_filesystem(legacy_client_fscid); | |
993 | rank_pos = 0; | |
994 | } else { | |
995 | if (parse_filesystem(role_str.substr(0, colon_pos), &fs) < 0) { | |
996 | ss << "Invalid filesystem"; | |
997 | return -ENOENT; | |
998 | } | |
999 | rank_pos = colon_pos+1; | |
1000 | } | |
1001 | ||
1002 | mds_rank_t rank; | |
1003 | std::string err; | |
1004 | std::string rank_str = role_str.substr(rank_pos); | |
1005 | long rank_i = strict_strtol(rank_str.c_str(), 10, &err); | |
1006 | if (rank_i < 0 || !err.empty()) { | |
1007 | ss << "Invalid rank '" << rank_str << "'"; | |
1008 | return -EINVAL; | |
1009 | } else { | |
1010 | rank = rank_i; | |
1011 | } | |
1012 | ||
1013 | if (fs->mds_map.in.count(rank) == 0) { | |
1014 | ss << "Rank '" << rank << "' not found"; | |
1015 | return -ENOENT; | |
1016 | } | |
1017 | ||
1018 | *role = {fs->fscid, rank}; | |
1019 | ||
1020 | return 0; | |
1021 | } |