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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 | #include "rgw_rados.h" | |
5 | #include "rgw_bucket.h" | |
6 | #include "rgw_reshard.h" | |
7 | #include "cls/rgw/cls_rgw_client.h" | |
8 | #include "cls/lock/cls_lock_client.h" | |
9 | #include "common/errno.h" | |
10 | #include "common/ceph_json.h" | |
11 | ||
12 | #include "common/dout.h" | |
13 | ||
14 | #define dout_context g_ceph_context | |
15 | #define dout_subsys ceph_subsys_rgw | |
16 | ||
17 | const string reshard_oid_prefix = "reshard."; | |
18 | const string reshard_lock_name = "reshard_process"; | |
19 | const string bucket_instance_lock_name = "bucket_instance_lock"; | |
20 | ||
21 | using namespace std; | |
22 | ||
23 | #define RESHARD_SHARD_WINDOW 64 | |
24 | #define RESHARD_MAX_AIO 128 | |
25 | ||
26 | class BucketReshardShard { | |
27 | RGWRados *store; | |
28 | const RGWBucketInfo& bucket_info; | |
29 | int num_shard; | |
30 | RGWRados::BucketShard bs; | |
31 | vector<rgw_cls_bi_entry> entries; | |
32 | map<uint8_t, rgw_bucket_category_stats> stats; | |
33 | deque<librados::AioCompletion *>& aio_completions; | |
34 | ||
35 | int wait_next_completion() { | |
36 | librados::AioCompletion *c = aio_completions.front(); | |
37 | aio_completions.pop_front(); | |
38 | ||
39 | c->wait_for_safe(); | |
40 | ||
41 | int ret = c->get_return_value(); | |
42 | c->release(); | |
43 | ||
44 | if (ret < 0) { | |
45 | derr << "ERROR: reshard rados operation failed: " << cpp_strerror(-ret) << dendl; | |
46 | return ret; | |
47 | } | |
48 | ||
49 | return 0; | |
50 | } | |
51 | ||
52 | int get_completion(librados::AioCompletion **c) { | |
53 | if (aio_completions.size() >= RESHARD_MAX_AIO) { | |
54 | int ret = wait_next_completion(); | |
55 | if (ret < 0) { | |
56 | return ret; | |
57 | } | |
58 | } | |
59 | ||
60 | *c = librados::Rados::aio_create_completion(nullptr, nullptr, nullptr); | |
61 | aio_completions.push_back(*c); | |
62 | ||
63 | return 0; | |
64 | } | |
65 | ||
66 | public: | |
67 | BucketReshardShard(RGWRados *_store, const RGWBucketInfo& _bucket_info, | |
68 | int _num_shard, | |
69 | deque<librados::AioCompletion *>& _completions) : store(_store), bucket_info(_bucket_info), bs(store), | |
70 | aio_completions(_completions) { | |
71 | num_shard = (bucket_info.num_shards > 0 ? _num_shard : -1); | |
72 | bs.init(bucket_info.bucket, num_shard); | |
73 | } | |
74 | ||
75 | int get_num_shard() { | |
76 | return num_shard; | |
77 | } | |
78 | ||
79 | int add_entry(rgw_cls_bi_entry& entry, bool account, uint8_t category, | |
80 | const rgw_bucket_category_stats& entry_stats) { | |
81 | entries.push_back(entry); | |
82 | if (account) { | |
83 | rgw_bucket_category_stats& target = stats[category]; | |
84 | target.num_entries += entry_stats.num_entries; | |
85 | target.total_size += entry_stats.total_size; | |
86 | target.total_size_rounded += entry_stats.total_size_rounded; | |
87 | } | |
88 | if (entries.size() >= RESHARD_SHARD_WINDOW) { | |
89 | int ret = flush(); | |
90 | if (ret < 0) { | |
91 | return ret; | |
92 | } | |
93 | } | |
94 | return 0; | |
95 | } | |
96 | int flush() { | |
97 | if (entries.size() == 0) { | |
98 | return 0; | |
99 | } | |
100 | ||
101 | librados::ObjectWriteOperation op; | |
102 | for (auto& entry : entries) { | |
103 | store->bi_put(op, bs, entry); | |
104 | } | |
105 | cls_rgw_bucket_update_stats(op, false, stats); | |
106 | ||
107 | librados::AioCompletion *c; | |
108 | int ret = get_completion(&c); | |
109 | if (ret < 0) { | |
110 | return ret; | |
111 | } | |
112 | ret = bs.index_ctx.aio_operate(bs.bucket_obj, c, &op); | |
113 | if (ret < 0) { | |
114 | derr << "ERROR: failed to store entries in target bucket shard (bs=" << bs.bucket << "/" << bs.shard_id << ") error=" << cpp_strerror(-ret) << dendl; | |
115 | return ret; | |
116 | } | |
117 | entries.clear(); | |
118 | stats.clear(); | |
119 | return 0; | |
120 | } | |
121 | ||
122 | int wait_all_aio() { | |
123 | int ret = 0; | |
124 | while (!aio_completions.empty()) { | |
125 | int r = wait_next_completion(); | |
126 | if (r < 0) { | |
127 | ret = r; | |
128 | } | |
129 | } | |
130 | return ret; | |
131 | } | |
132 | }; | |
133 | ||
134 | class BucketReshardManager { | |
135 | RGWRados *store; | |
136 | const RGWBucketInfo& target_bucket_info; | |
137 | deque<librados::AioCompletion *> completions; | |
138 | int num_target_shards; | |
139 | vector<BucketReshardShard *> target_shards; | |
140 | ||
141 | public: | |
142 | BucketReshardManager(RGWRados *_store, const RGWBucketInfo& _target_bucket_info, int _num_target_shards) : store(_store), target_bucket_info(_target_bucket_info), | |
143 | num_target_shards(_num_target_shards) { | |
144 | target_shards.resize(num_target_shards); | |
145 | for (int i = 0; i < num_target_shards; ++i) { | |
146 | target_shards[i] = new BucketReshardShard(store, target_bucket_info, i, completions); | |
147 | } | |
148 | } | |
149 | ||
150 | ~BucketReshardManager() { | |
151 | for (auto& shard : target_shards) { | |
152 | int ret = shard->wait_all_aio(); | |
153 | if (ret < 0) { | |
154 | ldout(store->ctx(), 20) << __func__ << ": shard->wait_all_aio() returned ret=" << ret << dendl; | |
155 | } | |
156 | } | |
157 | } | |
158 | ||
159 | int add_entry(int shard_index, | |
160 | rgw_cls_bi_entry& entry, bool account, uint8_t category, | |
161 | const rgw_bucket_category_stats& entry_stats) { | |
162 | int ret = target_shards[shard_index]->add_entry(entry, account, category, entry_stats); | |
163 | if (ret < 0) { | |
164 | derr << "ERROR: target_shards.add_entry(" << entry.idx << ") returned error: " << cpp_strerror(-ret) << dendl; | |
165 | return ret; | |
166 | } | |
167 | return 0; | |
168 | } | |
169 | ||
170 | int finish() { | |
171 | int ret = 0; | |
172 | for (auto& shard : target_shards) { | |
173 | int r = shard->flush(); | |
174 | if (r < 0) { | |
175 | derr << "ERROR: target_shards[" << shard->get_num_shard() << "].flush() returned error: " << cpp_strerror(-r) << dendl; | |
176 | ret = r; | |
177 | } | |
178 | } | |
179 | for (auto& shard : target_shards) { | |
180 | int r = shard->wait_all_aio(); | |
181 | if (r < 0) { | |
182 | derr << "ERROR: target_shards[" << shard->get_num_shard() << "].wait_all_aio() returned error: " << cpp_strerror(-r) << dendl; | |
183 | ret = r; | |
184 | } | |
185 | delete shard; | |
186 | } | |
187 | target_shards.clear(); | |
188 | return ret; | |
189 | } | |
190 | }; | |
191 | ||
192 | RGWBucketReshard::RGWBucketReshard(RGWRados *_store, const RGWBucketInfo& _bucket_info, const map<string, bufferlist>& _bucket_attrs) : | |
193 | store(_store), bucket_info(_bucket_info), bucket_attrs(_bucket_attrs), | |
194 | reshard_lock(reshard_lock_name) { | |
195 | const rgw_bucket& b = bucket_info.bucket; | |
196 | reshard_oid = b.tenant + (b.tenant.empty() ? "" : ":") + b.name + ":" + b.bucket_id; | |
197 | ||
198 | utime_t lock_duration(store->ctx()->_conf->rgw_reshard_bucket_lock_duration, 0); | |
199 | #define COOKIE_LEN 16 | |
200 | char cookie_buf[COOKIE_LEN + 1]; | |
201 | gen_rand_alphanumeric(store->ctx(), cookie_buf, sizeof(cookie_buf) - 1); | |
202 | cookie_buf[COOKIE_LEN] = '\0'; | |
203 | ||
204 | reshard_lock.set_cookie(cookie_buf); | |
205 | reshard_lock.set_duration(lock_duration); | |
206 | } | |
207 | ||
208 | int RGWBucketReshard::lock_bucket() | |
209 | { | |
210 | int ret = reshard_lock.lock_exclusive(&store->reshard_pool_ctx, reshard_oid); | |
211 | if (ret < 0) { | |
212 | ldout(store->ctx(), 0) << "RGWReshard::add failed to acquire lock on " << reshard_oid << " ret=" << ret << dendl; | |
213 | return ret; | |
214 | } | |
215 | return 0; | |
216 | } | |
217 | ||
218 | void RGWBucketReshard::unlock_bucket() | |
219 | { | |
220 | int ret = reshard_lock.unlock(&store->reshard_pool_ctx, reshard_oid); | |
221 | if (ret < 0) { | |
222 | ldout(store->ctx(), 0) << "WARNING: RGWReshard::add failed to drop lock on " << reshard_oid << " ret=" << ret << dendl; | |
223 | } | |
224 | } | |
225 | ||
226 | int RGWBucketReshard::set_resharding_status(const string& new_instance_id, int32_t num_shards, cls_rgw_reshard_status status) | |
227 | { | |
228 | if (new_instance_id.empty()) { | |
229 | ldout(store->ctx(), 0) << __func__ << " missing new bucket instance id" << dendl; | |
230 | return -EINVAL; | |
231 | } | |
232 | ||
233 | cls_rgw_bucket_instance_entry instance_entry; | |
234 | instance_entry.set_status(new_instance_id, num_shards, status); | |
235 | ||
236 | int ret = store->bucket_set_reshard(bucket_info, instance_entry); | |
237 | if (ret < 0) { | |
238 | ldout(store->ctx(), 0) << "RGWReshard::" << __func__ << " ERROR: error setting bucket resharding flag on bucket index: " | |
239 | << cpp_strerror(-ret) << dendl; | |
240 | return ret; | |
241 | } | |
242 | return 0; | |
243 | } | |
244 | ||
245 | int RGWBucketReshard::clear_resharding() | |
246 | { | |
247 | cls_rgw_bucket_instance_entry instance_entry; | |
248 | ||
249 | int ret = store->bucket_set_reshard(bucket_info, instance_entry); | |
250 | if (ret < 0) { | |
251 | ldout(store->ctx(), 0) << "RGWReshard::" << __func__ << " ERROR: error setting bucket resharding flag on bucket index: " | |
252 | << cpp_strerror(-ret) << dendl; | |
253 | return ret; | |
254 | } | |
255 | return 0; | |
256 | } | |
257 | ||
258 | static int create_new_bucket_instance(RGWRados *store, | |
259 | int new_num_shards, | |
260 | const RGWBucketInfo& bucket_info, | |
261 | map<string, bufferlist>& attrs, | |
262 | RGWBucketInfo& new_bucket_info) | |
263 | { | |
264 | new_bucket_info = bucket_info; | |
265 | ||
266 | store->create_bucket_id(&new_bucket_info.bucket.bucket_id); | |
267 | new_bucket_info.bucket.oid.clear(); | |
268 | ||
269 | new_bucket_info.num_shards = new_num_shards; | |
270 | new_bucket_info.objv_tracker.clear(); | |
271 | ||
272 | new_bucket_info.new_bucket_instance_id.clear(); | |
273 | new_bucket_info.reshard_status = 0; | |
274 | ||
275 | int ret = store->init_bucket_index(new_bucket_info, new_bucket_info.num_shards); | |
276 | if (ret < 0) { | |
277 | cerr << "ERROR: failed to init new bucket indexes: " << cpp_strerror(-ret) << std::endl; | |
278 | return -ret; | |
279 | } | |
280 | ||
281 | ret = store->put_bucket_instance_info(new_bucket_info, true, real_time(), &attrs); | |
282 | if (ret < 0) { | |
283 | cerr << "ERROR: failed to store new bucket instance info: " << cpp_strerror(-ret) << std::endl; | |
284 | return -ret; | |
285 | } | |
286 | ||
287 | return 0; | |
288 | } | |
289 | ||
290 | int RGWBucketReshard::create_new_bucket_instance(int new_num_shards, | |
291 | RGWBucketInfo& new_bucket_info) | |
292 | { | |
293 | return ::create_new_bucket_instance(store, new_num_shards, bucket_info, bucket_attrs, new_bucket_info); | |
294 | } | |
295 | ||
296 | class BucketInfoReshardUpdate | |
297 | { | |
298 | RGWRados *store; | |
299 | RGWBucketInfo bucket_info; | |
300 | std::map<string, bufferlist> bucket_attrs; | |
301 | ||
302 | bool in_progress{false}; | |
303 | ||
304 | int set_status(cls_rgw_reshard_status s) { | |
305 | bucket_info.reshard_status = s; | |
306 | int ret = store->put_bucket_instance_info(bucket_info, false, real_time(), &bucket_attrs); | |
307 | if (ret < 0) { | |
308 | ldout(store->ctx(), 0) << "ERROR: failed to write bucket info, ret=" << ret << dendl; | |
309 | return ret; | |
310 | } | |
311 | return 0; | |
312 | } | |
313 | ||
314 | public: | |
315 | BucketInfoReshardUpdate(RGWRados *_store, RGWBucketInfo& _bucket_info, | |
316 | map<string, bufferlist>& _bucket_attrs, const string& new_bucket_id) : store(_store), | |
317 | bucket_info(_bucket_info), | |
318 | bucket_attrs(_bucket_attrs) { | |
319 | bucket_info.new_bucket_instance_id = new_bucket_id; | |
320 | } | |
321 | ~BucketInfoReshardUpdate() { | |
322 | if (in_progress) { | |
323 | bucket_info.new_bucket_instance_id.clear(); | |
324 | set_status(CLS_RGW_RESHARD_NONE); | |
325 | } | |
326 | } | |
327 | ||
328 | int start() { | |
329 | int ret = set_status(CLS_RGW_RESHARD_IN_PROGRESS); | |
330 | if (ret < 0) { | |
331 | return ret; | |
332 | } | |
333 | in_progress = true; | |
334 | return 0; | |
335 | } | |
336 | ||
337 | int complete() { | |
338 | int ret = set_status(CLS_RGW_RESHARD_DONE); | |
339 | if (ret < 0) { | |
340 | return ret; | |
341 | } | |
342 | in_progress = false; | |
343 | return 0; | |
344 | } | |
345 | }; | |
346 | ||
347 | int RGWBucketReshard::do_reshard( | |
348 | int num_shards, | |
349 | const RGWBucketInfo& new_bucket_info, | |
350 | int max_entries, | |
351 | bool verbose, | |
352 | ostream *out, | |
353 | Formatter *formatter) | |
354 | { | |
355 | rgw_bucket& bucket = bucket_info.bucket; | |
356 | ||
357 | int ret = 0; | |
358 | ||
359 | if (out) { | |
360 | (*out) << "*** NOTICE: operation will not remove old bucket index objects ***" << std::endl; | |
361 | (*out) << "*** these will need to be removed manually ***" << std::endl; | |
362 | (*out) << "tenant: " << bucket_info.bucket.tenant << std::endl; | |
363 | (*out) << "bucket name: " << bucket_info.bucket.name << std::endl; | |
364 | (*out) << "old bucket instance id: " << bucket_info.bucket.bucket_id << std::endl; | |
365 | (*out) << "new bucket instance id: " << new_bucket_info.bucket.bucket_id << std::endl; | |
366 | } | |
367 | ||
368 | /* update bucket info -- in progress*/ | |
369 | list<rgw_cls_bi_entry> entries; | |
370 | ||
371 | if (max_entries < 0) { | |
372 | ldout(store->ctx(), 0) << __func__ << ": can't reshard, negative max_entries" << dendl; | |
373 | return -EINVAL; | |
374 | } | |
375 | ||
376 | BucketInfoReshardUpdate bucket_info_updater(store, bucket_info, bucket_attrs, new_bucket_info.bucket.bucket_id); | |
377 | ||
378 | ret = bucket_info_updater.start(); | |
379 | if (ret < 0) { | |
380 | ldout(store->ctx(), 0) << __func__ << ": failed to update bucket info ret=" << ret << dendl; | |
381 | return ret; | |
382 | } | |
383 | ||
384 | int num_target_shards = (new_bucket_info.num_shards > 0 ? new_bucket_info.num_shards : 1); | |
385 | ||
386 | BucketReshardManager target_shards_mgr(store, new_bucket_info, num_target_shards); | |
387 | ||
388 | verbose = verbose && (formatter != nullptr); | |
389 | ||
390 | if (verbose) { | |
391 | formatter->open_array_section("entries"); | |
392 | } | |
393 | ||
394 | uint64_t total_entries = 0; | |
395 | ||
396 | if (!verbose) { | |
397 | cout << "total entries:"; | |
398 | } | |
399 | ||
400 | int num_source_shards = (bucket_info.num_shards > 0 ? bucket_info.num_shards : 1); | |
401 | string marker; | |
402 | for (int i = 0; i < num_source_shards; ++i) { | |
403 | bool is_truncated = true; | |
404 | marker.clear(); | |
405 | while (is_truncated) { | |
406 | entries.clear(); | |
407 | ret = store->bi_list(bucket, i, string(), marker, max_entries, &entries, &is_truncated); | |
408 | if (ret < 0 && ret != -ENOENT) { | |
409 | derr << "ERROR: bi_list(): " << cpp_strerror(-ret) << dendl; | |
410 | return -ret; | |
411 | } | |
412 | ||
413 | list<rgw_cls_bi_entry>::iterator iter; | |
414 | for (iter = entries.begin(); iter != entries.end(); ++iter) { | |
415 | rgw_cls_bi_entry& entry = *iter; | |
416 | if (verbose) { | |
417 | formatter->open_object_section("entry"); | |
418 | ||
419 | encode_json("shard_id", i, formatter); | |
420 | encode_json("num_entry", total_entries, formatter); | |
421 | encode_json("entry", entry, formatter); | |
422 | } | |
423 | total_entries++; | |
424 | ||
425 | marker = entry.idx; | |
426 | ||
427 | int target_shard_id; | |
428 | cls_rgw_obj_key cls_key; | |
429 | uint8_t category; | |
430 | rgw_bucket_category_stats stats; | |
431 | bool account = entry.get_info(&cls_key, &category, &stats); | |
432 | rgw_obj_key key(cls_key); | |
433 | rgw_obj obj(new_bucket_info.bucket, key); | |
434 | int ret = store->get_target_shard_id(new_bucket_info, obj.get_hash_object(), &target_shard_id); | |
435 | if (ret < 0) { | |
436 | lderr(store->ctx()) << "ERROR: get_target_shard_id() returned ret=" << ret << dendl; | |
437 | return ret; | |
438 | } | |
439 | ||
440 | int shard_index = (target_shard_id > 0 ? target_shard_id : 0); | |
441 | ||
442 | ret = target_shards_mgr.add_entry(shard_index, entry, account, category, stats); | |
443 | if (ret < 0) { | |
444 | return ret; | |
445 | } | |
446 | if (verbose) { | |
447 | formatter->close_section(); | |
448 | if (out) { | |
449 | formatter->flush(*out); | |
450 | formatter->flush(*out); | |
451 | } | |
452 | } else if (out && !(total_entries % 1000)) { | |
453 | (*out) << " " << total_entries; | |
454 | } | |
455 | } | |
456 | } | |
457 | } | |
458 | if (verbose) { | |
459 | formatter->close_section(); | |
460 | if (out) { | |
461 | formatter->flush(*out); | |
462 | } | |
463 | } else if (out) { | |
464 | (*out) << " " << total_entries << std::endl; | |
465 | } | |
466 | ||
467 | ret = target_shards_mgr.finish(); | |
468 | if (ret < 0) { | |
469 | lderr(store->ctx()) << "ERROR: failed to reshard" << dendl; | |
470 | return EIO; | |
471 | } | |
472 | ||
473 | RGWBucketAdminOpState bucket_op; | |
474 | ||
475 | bucket_op.set_bucket_name(new_bucket_info.bucket.name); | |
476 | bucket_op.set_bucket_id(new_bucket_info.bucket.bucket_id); | |
477 | bucket_op.set_user_id(new_bucket_info.owner); | |
478 | string err; | |
479 | int r = RGWBucketAdminOp::link(store, bucket_op, &err); | |
480 | if (r < 0) { | |
481 | lderr(store->ctx()) << "failed to link new bucket instance (bucket_id=" << new_bucket_info.bucket.bucket_id << ": " << err << "; " << cpp_strerror(-r) << ")" << dendl; | |
482 | return -r; | |
483 | } | |
484 | ||
485 | ret = bucket_info_updater.complete(); | |
486 | if (ret < 0) { | |
487 | ldout(store->ctx(), 0) << __func__ << ": failed to update bucket info ret=" << ret << dendl; | |
488 | /* don't error out, reshard process succeeded */ | |
489 | } | |
490 | return 0; | |
491 | } | |
492 | ||
493 | int RGWBucketReshard::get_status(list<cls_rgw_bucket_instance_entry> *status) | |
494 | { | |
495 | librados::IoCtx index_ctx; | |
496 | map<int, string> bucket_objs; | |
497 | ||
498 | int r = store->open_bucket_index(bucket_info, index_ctx, bucket_objs); | |
499 | if (r < 0) { | |
500 | return r; | |
501 | } | |
502 | ||
503 | for (auto i : bucket_objs) { | |
504 | cls_rgw_bucket_instance_entry entry; | |
505 | ||
506 | int ret = cls_rgw_get_bucket_resharding(index_ctx, i.second, &entry); | |
507 | if (ret < 0 && ret != -ENOENT) { | |
508 | lderr(store->ctx()) << "ERROR: " << __func__ << ": cls_rgw_get_bucket_resharding() returned ret=" << ret << dendl; | |
509 | return ret; | |
510 | } | |
511 | ||
512 | status->push_back(entry); | |
513 | } | |
514 | ||
515 | return 0; | |
516 | } | |
517 | ||
518 | int RGWBucketReshard::execute(int num_shards, int max_op_entries, | |
519 | bool verbose, ostream *out, Formatter *formatter, RGWReshard* reshard_log) | |
520 | ||
521 | { | |
522 | int ret = lock_bucket(); | |
523 | if (ret < 0) { | |
524 | return ret; | |
525 | } | |
526 | ||
527 | RGWBucketInfo new_bucket_info; | |
528 | ret = create_new_bucket_instance(num_shards, new_bucket_info); | |
529 | if (ret < 0) { | |
530 | unlock_bucket(); | |
531 | return ret; | |
532 | } | |
533 | ||
534 | if (reshard_log) { | |
535 | ret = reshard_log->update(bucket_info, new_bucket_info); | |
536 | if (ret < 0) { | |
537 | return ret; | |
538 | } | |
539 | } | |
540 | ||
541 | ret = set_resharding_status(new_bucket_info.bucket.bucket_id, num_shards, CLS_RGW_RESHARD_IN_PROGRESS); | |
542 | if (ret < 0) { | |
543 | unlock_bucket(); | |
544 | return ret; | |
545 | } | |
546 | ||
547 | ret = do_reshard(num_shards, | |
548 | new_bucket_info, | |
549 | max_op_entries, | |
550 | verbose, out, formatter); | |
551 | ||
552 | if (ret < 0) { | |
553 | unlock_bucket(); | |
554 | return ret; | |
555 | } | |
556 | ||
557 | ret = set_resharding_status(new_bucket_info.bucket.bucket_id, num_shards, CLS_RGW_RESHARD_DONE); | |
558 | if (ret < 0) { | |
559 | unlock_bucket(); | |
560 | return ret; | |
561 | } | |
562 | ||
563 | unlock_bucket(); | |
564 | ||
565 | return 0; | |
566 | } | |
567 | ||
568 | ||
569 | RGWReshard::RGWReshard(RGWRados* _store, bool _verbose, ostream *_out, | |
570 | Formatter *_formatter) : store(_store), instance_lock(bucket_instance_lock_name), | |
571 | verbose(_verbose), out(_out), formatter(_formatter) | |
572 | { | |
573 | num_logshards = store->ctx()->_conf->rgw_reshard_num_logs; | |
574 | } | |
575 | ||
576 | string RGWReshard::get_logshard_key(const string& tenant, const string& bucket_name) | |
577 | { | |
578 | return tenant + ":" + bucket_name; | |
579 | } | |
580 | ||
581 | #define MAX_RESHARD_LOGSHARDS_PRIME 7877 | |
582 | ||
583 | void RGWReshard::get_bucket_logshard_oid(const string& tenant, const string& bucket_name, string *oid) | |
584 | { | |
585 | string key = get_logshard_key(tenant, bucket_name); | |
586 | ||
587 | uint32_t sid = ceph_str_hash_linux(key.c_str(), key.size()); | |
588 | uint32_t sid2 = sid ^ ((sid & 0xFF) << 24); | |
589 | sid = sid2 % MAX_RESHARD_LOGSHARDS_PRIME % num_logshards; | |
590 | int logshard = sid % num_logshards; | |
591 | ||
592 | get_logshard_oid(logshard, oid); | |
593 | } | |
594 | ||
595 | int RGWReshard::add(cls_rgw_reshard_entry& entry) | |
596 | { | |
597 | string logshard_oid; | |
598 | ||
599 | get_bucket_logshard_oid(entry.tenant, entry.bucket_name, &logshard_oid); | |
600 | ||
601 | librados::ObjectWriteOperation op; | |
602 | cls_rgw_reshard_add(op, entry); | |
603 | ||
604 | int ret = store->reshard_pool_ctx.operate(logshard_oid, &op); | |
605 | if (ret < 0) { | |
606 | lderr(store->ctx()) << "ERROR: failed to add entry to reshard log, oid=" << logshard_oid << " tenant=" << entry.tenant << " bucket=" << entry.bucket_name << dendl; | |
607 | return ret; | |
608 | } | |
609 | return 0; | |
610 | } | |
611 | ||
612 | int RGWReshard::update(const RGWBucketInfo& bucket_info, const RGWBucketInfo& new_bucket_info) | |
613 | { | |
614 | cls_rgw_reshard_entry entry; | |
615 | entry.bucket_name = bucket_info.bucket.name; | |
616 | entry.bucket_id = bucket_info.bucket.bucket_id; | |
617 | ||
618 | int ret = get(entry); | |
619 | if (ret < 0) { | |
620 | return ret; | |
621 | } | |
622 | ||
623 | entry.new_instance_id = new_bucket_info.bucket.name + ":" + new_bucket_info.bucket.bucket_id; | |
624 | ||
625 | ret = add(entry); | |
626 | if (ret < 0) { | |
627 | ldout(store->ctx(), 0) << __func__ << ":Error in updating entry bucket " << entry.bucket_name << ": " << | |
628 | cpp_strerror(-ret) << dendl; | |
629 | } | |
630 | ||
631 | return ret; | |
632 | } | |
633 | ||
634 | ||
635 | int RGWReshard::list(int logshard_num, string& marker, uint32_t max, std::list<cls_rgw_reshard_entry>& entries, bool *is_truncated) | |
636 | { | |
637 | string logshard_oid; | |
638 | ||
639 | get_logshard_oid(logshard_num, &logshard_oid); | |
640 | ||
641 | int ret = cls_rgw_reshard_list(store->reshard_pool_ctx, logshard_oid, marker, max, entries, is_truncated); | |
642 | if (ret < 0 && ret != -ENOENT) { | |
643 | lderr(store->ctx()) << "ERROR: failed to list reshard log entries, oid=" << logshard_oid << dendl; | |
644 | return ret; | |
645 | } | |
646 | if (ret == -ENOENT) { | |
647 | *is_truncated = false; | |
648 | } | |
649 | return 0; | |
650 | } | |
651 | ||
652 | int RGWReshard::get(cls_rgw_reshard_entry& entry) | |
653 | { | |
654 | string logshard_oid; | |
655 | ||
656 | get_bucket_logshard_oid(entry.tenant, entry.bucket_name, &logshard_oid); | |
657 | ||
658 | int ret = cls_rgw_reshard_get(store->reshard_pool_ctx, logshard_oid, entry); | |
659 | if (ret < 0) { | |
660 | lderr(store->ctx()) << "ERROR: failed to get entry from reshard log, oid=" << logshard_oid << " tenant=" << entry.tenant << " bucket=" << entry.bucket_name << dendl; | |
661 | return ret; | |
662 | } | |
663 | ||
664 | return 0; | |
665 | } | |
666 | ||
667 | int RGWReshard::remove(cls_rgw_reshard_entry& entry) | |
668 | { | |
669 | string logshard_oid; | |
670 | ||
671 | get_bucket_logshard_oid(entry.tenant, entry.bucket_name, &logshard_oid); | |
672 | ||
673 | librados::ObjectWriteOperation op; | |
674 | cls_rgw_reshard_remove(op, entry); | |
675 | ||
676 | int ret = store->reshard_pool_ctx.operate(logshard_oid, &op); | |
677 | if (ret < 0) { | |
678 | lderr(store->ctx()) << "ERROR: failed to remove entry from reshard log, oid=" << logshard_oid << " tenant=" << entry.tenant << " bucket=" << entry.bucket_name << dendl; | |
679 | return ret; | |
680 | } | |
681 | ||
682 | return ret; | |
683 | } | |
684 | ||
685 | int RGWReshard::clear_bucket_resharding(const string& bucket_instance_oid, cls_rgw_reshard_entry& entry) | |
686 | { | |
687 | int ret = cls_rgw_clear_bucket_resharding(store->reshard_pool_ctx, bucket_instance_oid); | |
688 | if (ret < 0) { | |
689 | lderr(store->ctx()) << "ERROR: failed to clear bucket resharding, bucket_instance_oid=" << bucket_instance_oid << dendl; | |
690 | return ret; | |
691 | } | |
692 | ||
693 | return 0; | |
694 | } | |
695 | ||
696 | const int num_retries = 10; | |
697 | const int default_reshard_sleep_duration = 5; | |
698 | ||
699 | int RGWReshardWait::do_wait() | |
700 | { | |
701 | Mutex::Locker l(lock); | |
702 | ||
703 | cond.WaitInterval(lock, utime_t(default_reshard_sleep_duration, 0)); | |
704 | ||
705 | if (going_down) { | |
706 | return -ECANCELED; | |
707 | } | |
708 | ||
709 | return 0; | |
710 | } | |
711 | ||
712 | int RGWReshardWait::block_while_resharding(RGWRados::BucketShard *bs, string *new_bucket_id) | |
713 | { | |
714 | int ret = 0; | |
715 | cls_rgw_bucket_instance_entry entry; | |
716 | ||
717 | for (int i=0; i < num_retries;i++) { | |
718 | ret = cls_rgw_get_bucket_resharding(bs->index_ctx, bs->bucket_obj, &entry); | |
719 | if (ret < 0) { | |
720 | ldout(store->ctx(), 0) << __func__ << " ERROR: failed to get bucket resharding :" << | |
721 | cpp_strerror(-ret)<< dendl; | |
722 | return ret; | |
723 | } | |
724 | if (!entry.resharding_in_progress()) { | |
725 | *new_bucket_id = entry.new_bucket_instance_id; | |
726 | return 0; | |
727 | } | |
728 | ldout(store->ctx(), 20) << "NOTICE: reshard still in progress; " << (i < num_retries - 1 ? "retrying" : "too many retries") << dendl; | |
729 | /* needed to unlock as clear resharding uses the same lock */ | |
730 | ||
731 | if (i == num_retries - 1) { | |
732 | break; | |
733 | } | |
734 | ||
735 | ret = do_wait(); | |
736 | if (ret < 0) { | |
737 | ldout(store->ctx(), 0) << __func__ << " ERROR: bucket is still resharding, please retry" << dendl; | |
738 | return ret; | |
739 | } | |
740 | } | |
741 | ldout(store->ctx(), 0) << __func__ << " ERROR: bucket is still resharding, please retry" << dendl; | |
742 | return -ERR_BUSY_RESHARDING; | |
743 | } | |
744 | ||
745 | int RGWReshard::process_single_logshard(int logshard_num) | |
746 | { | |
747 | string marker; | |
748 | bool truncated = true; | |
749 | ||
750 | CephContext *cct = store->ctx(); | |
751 | int max_entries = 1000; | |
752 | int max_secs = 60; | |
753 | ||
754 | rados::cls::lock::Lock l(reshard_lock_name); | |
755 | ||
756 | utime_t time(max_secs, 0); | |
757 | l.set_duration(time); | |
758 | ||
759 | char cookie_buf[COOKIE_LEN + 1]; | |
760 | gen_rand_alphanumeric(store->ctx(), cookie_buf, sizeof(cookie_buf) - 1); | |
761 | cookie_buf[COOKIE_LEN] = '\0'; | |
762 | ||
763 | l.set_cookie(cookie_buf); | |
764 | ||
765 | string logshard_oid; | |
766 | get_logshard_oid(logshard_num, &logshard_oid); | |
767 | ||
768 | int ret = l.lock_exclusive(&store->reshard_pool_ctx, logshard_oid); | |
769 | if (ret == -EBUSY) { /* already locked by another processor */ | |
770 | ldout(store->ctx(), 5) << __func__ << "(): failed to acquire lock on " << logshard_oid << dendl; | |
771 | return ret; | |
772 | } | |
773 | ||
774 | utime_t lock_start_time = ceph_clock_now(); | |
775 | ||
776 | do { | |
777 | std::list<cls_rgw_reshard_entry> entries; | |
778 | ret = list(logshard_num, marker, max_entries, entries, &truncated); | |
779 | if (ret < 0) { | |
780 | ldout(cct, 10) << "cannot list all reshards in logshard oid=" << logshard_oid << dendl; | |
781 | continue; | |
782 | } | |
783 | ||
784 | for(auto& entry: entries) { | |
785 | if(entry.new_instance_id.empty()) { | |
786 | ||
787 | ldout(store->ctx(), 20) << __func__ << " resharding " << entry.bucket_name << dendl; | |
788 | ||
789 | RGWObjectCtx obj_ctx(store); | |
790 | rgw_bucket bucket; | |
791 | RGWBucketInfo bucket_info; | |
792 | map<string, bufferlist> attrs; | |
793 | ||
794 | ret = store->get_bucket_info(obj_ctx, entry.tenant, entry.bucket_name, bucket_info, nullptr, | |
795 | &attrs); | |
796 | if (ret < 0) { | |
797 | ldout(cct, 0) << __func__ << ": Error in get_bucket_info: " << cpp_strerror(-ret) << dendl; | |
798 | return -ret; | |
799 | } | |
800 | ||
801 | RGWBucketReshard br(store, bucket_info, attrs); | |
802 | ||
803 | Formatter* formatter = new JSONFormatter(false); | |
804 | auto formatter_ptr = std::unique_ptr<Formatter>(formatter); | |
805 | ret = br.execute(entry.new_num_shards, max_entries, true,nullptr, formatter, this); | |
806 | if (ret < 0) { | |
807 | ldout (store->ctx(), 0) << __func__ << "ERROR in reshard_bucket " << entry.bucket_name << ":" << | |
808 | cpp_strerror(-ret)<< dendl; | |
809 | return ret; | |
810 | } | |
811 | ||
812 | ldout (store->ctx(), 20) << " removing entry" << entry.bucket_name<< dendl; | |
813 | ||
814 | ret = remove(entry); | |
815 | if (ret < 0) { | |
816 | ldout(cct, 0)<< __func__ << ":Error removing bucket " << entry.bucket_name << " for resharding queue: " | |
817 | << cpp_strerror(-ret) << dendl; | |
818 | return ret; | |
819 | } | |
820 | } | |
821 | utime_t now = ceph_clock_now(); | |
822 | ||
823 | if (now > lock_start_time + max_secs / 2) { /* do you need to renew lock? */ | |
824 | l.set_renew(true); | |
825 | ret = l.lock_exclusive(&store->reshard_pool_ctx, logshard_oid); | |
826 | if (ret == -EBUSY) { /* already locked by another processor */ | |
827 | ldout(store->ctx(), 5) << __func__ << "(): failed to acquire lock on " << logshard_oid << dendl; | |
828 | return ret; | |
829 | } | |
830 | lock_start_time = now; | |
831 | } | |
832 | entry.get_key(&marker); | |
833 | } | |
834 | } while (truncated); | |
835 | ||
836 | l.unlock(&store->reshard_pool_ctx, logshard_oid); | |
837 | return 0; | |
838 | } | |
839 | ||
840 | ||
841 | void RGWReshard::get_logshard_oid(int shard_num, string *logshard) | |
842 | { | |
843 | char buf[32]; | |
844 | snprintf(buf, sizeof(buf), "%010u", (unsigned)shard_num); | |
845 | ||
846 | string objname(reshard_oid_prefix); | |
847 | *logshard = objname + buf; | |
848 | } | |
849 | ||
850 | int RGWReshard::process_all_logshards() | |
851 | { | |
852 | int ret = 0; | |
853 | ||
854 | for (int i = 0; i < num_logshards; i++) { | |
855 | string logshard; | |
856 | get_logshard_oid(i, &logshard); | |
857 | ||
858 | ldout(store->ctx(), 20) << "proceeding logshard = " << logshard << dendl; | |
859 | ||
860 | ret = process_single_logshard(i); | |
861 | if (ret <0) { | |
862 | return ret; | |
863 | } | |
864 | } | |
865 | ||
866 | return 0; | |
867 | } | |
868 | ||
869 | bool RGWReshard::going_down() | |
870 | { | |
871 | return down_flag; | |
872 | } | |
873 | ||
874 | void RGWReshard::start_processor() | |
875 | { | |
876 | worker = new ReshardWorker(store->ctx(), this); | |
877 | worker->create("rgw_reshard"); | |
878 | } | |
879 | ||
880 | void RGWReshard::stop_processor() | |
881 | { | |
882 | down_flag = true; | |
883 | if (worker) { | |
884 | worker->stop(); | |
885 | worker->join(); | |
886 | } | |
887 | delete worker; | |
224ce89b | 888 | worker = nullptr; |
31f18b77 FG |
889 | } |
890 | ||
891 | void *RGWReshard::ReshardWorker::entry() { | |
892 | utime_t last_run; | |
893 | do { | |
894 | utime_t start = ceph_clock_now(); | |
895 | ldout(cct, 2) << "object expiration: start" << dendl; | |
896 | if (reshard->process_all_logshards()) { | |
897 | /* All shards have been processed properly. Next time we can start | |
898 | * from this moment. */ | |
899 | last_run = start; | |
900 | } | |
901 | ldout(cct, 2) << "object expiration: stop" << dendl; | |
902 | ||
903 | ||
904 | if (reshard->going_down()) | |
905 | break; | |
906 | ||
907 | utime_t end = ceph_clock_now(); | |
908 | end -= start; | |
909 | int secs = cct->_conf->rgw_reshard_thread_interval; | |
910 | ||
911 | if (secs <= end.sec()) | |
912 | continue; // next round | |
913 | ||
914 | secs -= end.sec(); | |
915 | ||
916 | lock.Lock(); | |
917 | cond.WaitInterval(lock, utime_t(secs, 0)); | |
918 | lock.Unlock(); | |
919 | } while (!reshard->going_down()); | |
920 | ||
921 | return NULL; | |
922 | } | |
923 | ||
924 | void RGWReshard::ReshardWorker::stop() | |
925 | { | |
926 | Mutex::Locker l(lock); | |
927 | cond.Signal(); | |
928 | } |