ceph/src/rgw/rgw_sync_module_es.cc

   1 #include "rgw_common.h"
   2 #include "rgw_coroutine.h"
   3 #include "rgw_sync_module.h"
   4 #include "rgw_data_sync.h"
   5 #include "rgw_sync_module_es.h"
   6 #include "rgw_sync_module_es_rest.h"
   7 #include "rgw_rest_conn.h"
   8 #include "rgw_cr_rest.h"
   9 #include "rgw_op.h"
  10 #include "rgw_es_query.h"
  11
  12 #include "include/str_list.h"
  13
  14 #include <boost/asio/yield.hpp>
  15
  16 #define dout_subsys ceph_subsys_rgw
  17
  18
  19 /*
  20  * whitelist utility. Config string is a list of entries, where an entry is either an item,
  21  * a prefix, or a suffix. An item would be the name of the entity that we'd look up,
  22  * a prefix would be a string ending with an asterisk, a suffix would be a string starting
  23  * with an asterisk. For example:
  24  *
  25  *      bucket1, bucket2, foo*, *bar
  26  */
  27 class ItemList {
  28   bool approve_all{false};
  29
  30   set<string> entries;
  31   set<string> prefixes;
  32   set<string> suffixes;
  33
  34   void parse(const string& str) {
  35     list<string> l;
  36
  37     get_str_list(str, ",", l);
  38
  39     for (auto& entry : l) {
  40       entry = rgw_trim_whitespace(entry);
  41       if (entry.empty()) {
  42         continue;
  43       }
  44
  45       if (entry == "*") {
  46         approve_all = true;
  47         return;
  48       }
  49
  50       if (entry[0] == '*') {
  51         suffixes.insert(entry.substr(1));
  52         continue;
  53       }
  54
  55       if (entry.back() == '*') {
  56         prefixes.insert(entry.substr(0, entry.size() - 1));
  57         continue;
  58       }
  59
  60       entries.insert(entry);
  61     }
  62   }
  63
  64 public:
  65   ItemList() {}
  66   void init(const string& str, bool def_val) {
  67     if (str.empty()) {
  68       approve_all = def_val;
  69     } else {
  70       parse(str);
  71     }
  72   }
  73
  74   bool exists(const string& entry) {
  75     if (approve_all) {
  76       return true;
  77     }
  78
  79     if (entries.find(entry) != entries.end()) {
  80       return true;
  81     }
  82
  83     auto i = prefixes.upper_bound(entry);
  84     if (i != prefixes.begin()) {
  85       --i;
  86       if (boost::algorithm::starts_with(entry, *i)) {
  87         return true;
  88       }
  89     }
  90
  91     for (i = suffixes.begin(); i != suffixes.end(); ++i) {
  92       if (boost::algorithm::ends_with(entry, *i)) {
  93         return true;
  94       }
  95     }
  96
  97     return false;
  98   }
  99 };
 100
 101 #define ES_NUM_SHARDS_MIN 5
 102
 103 #define ES_NUM_SHARDS_DEFAULT 16
 104 #define ES_NUM_REPLICAS_DEFAULT 1
 105
 106 struct ElasticConfig {
 107   uint64_t sync_instance{0};
 108   string id;
 109   string index_path;
 110   std::unique_ptr<RGWRESTConn> conn;
 111   bool explicit_custom_meta{true};
 112   string override_index_path;
 113   ItemList index_buckets;
 114   ItemList allow_owners;
 115   uint32_t num_shards{0};
 116   uint32_t num_replicas{0};
 117
 118   void init(CephContext *cct, const map<string, string, ltstr_nocase>& config) {
 119     string elastic_endpoint = rgw_conf_get(config, "endpoint", "");
 120     id = string("elastic:") + elastic_endpoint;
 121     conn.reset(new RGWRESTConn(cct, nullptr, id, { elastic_endpoint }));
 122     explicit_custom_meta = rgw_conf_get_bool(config, "explicit_custom_meta", true);
 123     index_buckets.init(rgw_conf_get(config, "index_buckets_list", ""), true); /* approve all buckets by default */
 124     allow_owners.init(rgw_conf_get(config, "approved_owners_list", ""), true); /* approve all bucket owners by default */
 125     override_index_path = rgw_conf_get(config, "override_index_path", "");
 126     num_shards = rgw_conf_get_int(config, "num_shards", ES_NUM_SHARDS_DEFAULT);
 127     if (num_shards < ES_NUM_SHARDS_MIN) {
 128       num_shards = ES_NUM_SHARDS_MIN;
 129     }
 130     num_replicas = rgw_conf_get_int(config, "num_replicas", ES_NUM_REPLICAS_DEFAULT);
 131   }
 132
 133   void init_instance(RGWRealm& realm, uint64_t instance_id) {
 134     sync_instance = instance_id;
 135
 136     if (!override_index_path.empty()) {
 137       index_path = override_index_path;
 138       return;
 139     }
 140
 141     char buf[32];
 142     snprintf(buf, sizeof(buf), "-%08x", (uint32_t)(sync_instance & 0xFFFFFFFF));
 143
 144     index_path = "/rgw-" + realm.get_name() + buf;
 145   }
 146
 147   string get_index_path() {
 148     return index_path;
 149   }
 150
 151   string get_obj_path(const RGWBucketInfo& bucket_info, const rgw_obj_key& key) {
 152     return index_path +  "/object/" + bucket_info.bucket.bucket_id + ":" + key.name + ":" + (key.instance.empty() ? "null" : key.instance);
 153   }
 154
 155   bool should_handle_operation(RGWBucketInfo& bucket_info) {
 156     return index_buckets.exists(bucket_info.bucket.name) &&
 157            allow_owners.exists(bucket_info.owner.to_str());
 158   }
 159 };
 160
 161 using ElasticConfigRef = std::shared_ptr<ElasticConfig>;
 162
 163 struct es_dump_type {
 164   const char *type;
 165   const char *format;
 166   bool analyzed;
 167
 168   es_dump_type(const char *t, const char *f = nullptr, bool a = false) : type(t), format(f), analyzed(a) {}
 169
 170   void dump(Formatter *f) const {
 171     encode_json("type", type, f);
 172     if (format) {
 173       encode_json("format", format, f);
 174     }
 175     if (!analyzed && strcmp(type, "string") == 0) {
 176       encode_json("index", "not_analyzed", f);
 177     }
 178   }
 179 };
 180
 181 struct es_index_mappings {
 182   void dump_custom(Formatter *f, const char *section, const char *type, const char *format) const {
 183     f->open_object_section(section);
 184     ::encode_json("type", "nested", f);
 185     f->open_object_section("properties");
 186     encode_json("name", es_dump_type("string"), f);
 187     encode_json("value", es_dump_type(type, format), f);
 188     f->close_section(); // entry
 189     f->close_section(); // custom-string
 190   }
 191   void dump(Formatter *f) const {
 192     f->open_object_section("object");
 193     f->open_object_section("properties");
 194     encode_json("bucket", es_dump_type("string"), f);
 195     encode_json("name", es_dump_type("string"), f);
 196     encode_json("instance", es_dump_type("string"), f);
 197     encode_json("versioned_epoch", es_dump_type("long"), f);
 198     f->open_object_section("meta");
 199     f->open_object_section("properties");
 200     encode_json("cache_control", es_dump_type("string"), f);
 201     encode_json("content_disposition", es_dump_type("string"), f);
 202     encode_json("content_encoding", es_dump_type("string"), f);
 203     encode_json("content_language", es_dump_type("string"), f);
 204     encode_json("content_type", es_dump_type("string"), f);
 205     encode_json("etag", es_dump_type("string"), f);
 206     encode_json("expires", es_dump_type("string"), f);
 207     f->open_object_section("mtime");
 208     ::encode_json("type", "date", f);
 209     ::encode_json("format", "strict_date_optional_time||epoch_millis", f);
 210     f->close_section(); // mtime
 211     encode_json("size", es_dump_type("long"), f);
 212     dump_custom(f, "custom-string", "string", nullptr);
 213     dump_custom(f, "custom-int", "long", nullptr);
 214     dump_custom(f, "custom-date", "date", "strict_date_optional_time||epoch_millis");
 215     f->close_section(); // properties
 216     f->close_section(); // meta
 217     f->close_section(); // properties
 218     f->close_section(); // object
 219   }
 220 };
 221
 222 struct es_index_settings {
 223   uint32_t num_replicas;
 224   uint32_t num_shards;
 225
 226   es_index_settings(uint32_t _replicas, uint32_t _shards) : num_replicas(_replicas), num_shards(_shards) {}
 227
 228   void dump(Formatter *f) const {
 229     encode_json("number_of_replicas", num_replicas, f);
 230     encode_json("number_of_shards", num_shards, f);
 231   }
 232 };
 233
 234 struct es_index_config {
 235   es_index_settings settings;
 236   es_index_mappings mappings;
 237
 238   es_index_config(es_index_settings& _s, es_index_mappings& _m) : settings(_s), mappings(_m) {}
 239
 240   void dump(Formatter *f) const {
 241     encode_json("settings", settings, f);
 242     encode_json("mappings", mappings, f);
 243   }
 244 };
 245
 246 struct es_obj_metadata {
 247   CephContext *cct;
 248   ElasticConfigRef es_conf;
 249   RGWBucketInfo bucket_info;
 250   rgw_obj_key key;
 251   ceph::real_time mtime;
 252   uint64_t size;
 253   map<string, bufferlist> attrs;
 254   uint64_t versioned_epoch;
 255
 256   es_obj_metadata(CephContext *_cct, ElasticConfigRef _es_conf, const RGWBucketInfo& _bucket_info,
 257                   const rgw_obj_key& _key, ceph::real_time& _mtime, uint64_t _size,
 258                   map<string, bufferlist>& _attrs, uint64_t _versioned_epoch) : cct(_cct), es_conf(_es_conf), bucket_info(_bucket_info), key(_key),
 259                                                      mtime(_mtime), size(_size), attrs(std::move(_attrs)), versioned_epoch(_versioned_epoch) {}
 260
 261   void dump(Formatter *f) const {
 262     map<string, string> out_attrs;
 263     map<string, string> custom_meta;
 264     RGWAccessControlPolicy policy;
 265     set<string> permissions;
 266
 267     for (auto i : attrs) {
 268       const string& attr_name = i.first;
 269       string name;
 270       bufferlist& val = i.second;
 271
 272       if (attr_name.compare(0, sizeof(RGW_ATTR_PREFIX) - 1, RGW_ATTR_PREFIX) != 0) {
 273         continue;
 274       }
 275
 276       if (attr_name.compare(0, sizeof(RGW_ATTR_META_PREFIX) - 1, RGW_ATTR_META_PREFIX) == 0) {
 277         name = attr_name.substr(sizeof(RGW_ATTR_META_PREFIX) - 1);
 278         custom_meta[name] = string(val.c_str(), (val.length() > 0 ? val.length() - 1 : 0));
 279         continue;
 280       }
 281
 282       name = attr_name.substr(sizeof(RGW_ATTR_PREFIX) - 1);
 283
 284       if (name == "acl") {
 285         try {
 286           auto i = val.begin();
 287           ::decode(policy, i);
 288         } catch (buffer::error& err) {
 289           ldout(cct, 0) << "ERROR: failed to decode acl for " << bucket_info.bucket << "/" << key << dendl;
 290         }
 291
 292         const RGWAccessControlList& acl = policy.get_acl();
 293
 294         permissions.insert(policy.get_owner().get_id().to_str());
 295         for (auto acliter : acl.get_grant_map()) {
 296           const ACLGrant& grant = acliter.second;
 297           if (grant.get_type().get_type() == ACL_TYPE_CANON_USER &&
 298               ((uint32_t)grant.get_permission().get_permissions() & RGW_PERM_READ) != 0) {
 299             rgw_user user;
 300             if (grant.get_id(user)) {
 301               permissions.insert(user.to_str());
 302             }
 303           }
 304         }
 305       } else {
 306         if (name != "pg_ver" &&
 307             name != "source_zone" &&
 308             name != "idtag") {
 309           out_attrs[name] = string(val.c_str(), (val.length() > 0 ? val.length() - 1 : 0));
 310         }
 311       }
 312     }
 313     ::encode_json("bucket", bucket_info.bucket.name, f);
 314     ::encode_json("name", key.name, f);
 315     ::encode_json("instance", key.instance, f);
 316     ::encode_json("versioned_epoch", versioned_epoch, f);
 317     ::encode_json("owner", policy.get_owner(), f);
 318     ::encode_json("permissions", permissions, f);
 319     f->open_object_section("meta");
 320     ::encode_json("size", size, f);
 321
 322     string mtime_str;
 323     rgw_to_iso8601(mtime, &mtime_str);
 324     ::encode_json("mtime", mtime_str, f);
 325     for (auto i : out_attrs) {
 326       ::encode_json(i.first.c_str(), i.second, f);
 327     }
 328     map<string, string> custom_str;
 329     map<string, string> custom_int;
 330     map<string, string> custom_date;
 331
 332     for (auto i : custom_meta) {
 333       auto config = bucket_info.mdsearch_config.find(i.first);
 334       if (config == bucket_info.mdsearch_config.end()) {
 335         if (!es_conf->explicit_custom_meta) {
 336           /* default custom meta is of type string */
 337           custom_str[i.first] = i.second;
 338         } else {
 339           ldout(cct, 20) << "custom meta entry key=" << i.first << " not found in bucket mdsearch config: " << bucket_info.mdsearch_config << dendl;
 340         }
 341         continue;
 342       }
 343       switch (config->second) {
 344         case ESEntityTypeMap::ES_ENTITY_DATE:
 345           custom_date[i.first] = i.second;
 346           break;
 347         case ESEntityTypeMap::ES_ENTITY_INT:
 348           custom_int[i.first] = i.second;
 349           break;
 350         default:
 351           custom_str[i.first] = i.second;
 352       }
 353     }
 354
 355     if (!custom_str.empty()) {
 356       f->open_array_section("custom-string");
 357       for (auto i : custom_str) {
 358         f->open_object_section("entity");
 359         ::encode_json("name", i.first.c_str(), f);
 360         ::encode_json("value", i.second, f);
 361         f->close_section();
 362       }
 363       f->close_section();
 364     }
 365     if (!custom_int.empty()) {
 366       f->open_array_section("custom-int");
 367       for (auto i : custom_int) {
 368         f->open_object_section("entity");
 369         ::encode_json("name", i.first.c_str(), f);
 370         ::encode_json("value", i.second, f);
 371         f->close_section();
 372       }
 373       f->close_section();
 374     }
 375     if (!custom_date.empty()) {
 376       f->open_array_section("custom-date");
 377       for (auto i : custom_date) {
 378         /*
 379          * try to exlicitly parse date field, otherwise elasticsearch could reject the whole doc,
 380          * which will end up with failed sync
 381          */
 382         real_time t;
 383         int r = parse_time(i.second.c_str(), &t);
 384         if (r < 0) {
 385           ldout(cct, 20) << __func__ << "(): failed to parse time (" << i.second << "), skipping encoding of custom date attribute" << dendl;
 386           continue;
 387         }
 388
 389         string time_str;
 390         rgw_to_iso8601(t, &time_str);
 391
 392         f->open_object_section("entity");
 393         ::encode_json("name", i.first.c_str(), f);
 394         ::encode_json("value", time_str.c_str(), f);
 395         f->close_section();
 396       }
 397       f->close_section();
 398     }
 399     f->close_section();
 400   }
 401 };
 402
 403 class RGWElasticInitConfigCBCR : public RGWCoroutine {
 404   RGWDataSyncEnv *sync_env;
 405   ElasticConfigRef conf;
 406 public:
 407   RGWElasticInitConfigCBCR(RGWDataSyncEnv *_sync_env,
 408                           ElasticConfigRef _conf) : RGWCoroutine(_sync_env->cct),
 409                                                     sync_env(_sync_env),
 410                                                     conf(_conf) {}
 411   int operate() override {
 412     reenter(this) {
 413       ldout(sync_env->cct, 0) << ": init elasticsearch config zone=" << sync_env->source_zone << dendl;
 414       yield {
 415         string path = conf->get_index_path();
 416
 417         es_index_settings settings(conf->num_replicas, conf->num_shards);
 418         es_index_mappings mappings;
 419
 420         es_index_config index_conf(settings, mappings);
 421
 422         call(new RGWPutRESTResourceCR<es_index_config, int>(sync_env->cct, conf->conn.get(),
 423                                                               sync_env->http_manager,
 424                                                               path, nullptr /* params */,
 425                                                               index_conf, nullptr /* result */));
 426       }
 427       if (retcode < 0) {
 428         return set_cr_error(retcode);
 429       }
 430       return set_cr_done();
 431     }
 432     return 0;
 433   }
 434
 435 };
 436
 437 class RGWElasticHandleRemoteObjCBCR : public RGWStatRemoteObjCBCR {
 438   ElasticConfigRef conf;
 439   uint64_t versioned_epoch;
 440 public:
 441   RGWElasticHandleRemoteObjCBCR(RGWDataSyncEnv *_sync_env,
 442                           RGWBucketInfo& _bucket_info, rgw_obj_key& _key,
 443                           ElasticConfigRef _conf, uint64_t _versioned_epoch) : RGWStatRemoteObjCBCR(_sync_env, _bucket_info, _key), conf(_conf),
 444                                                                                versioned_epoch(_versioned_epoch) {}
 445   int operate() override {
 446     reenter(this) {
 447       ldout(sync_env->cct, 10) << ": stat of remote obj: z=" << sync_env->source_zone
 448                                << " b=" << bucket_info.bucket << " k=" << key << " size=" << size << " mtime=" << mtime
 449                                << " attrs=" << attrs << dendl;
 450       yield {
 451         string path = conf->get_obj_path(bucket_info, key);
 452         es_obj_metadata doc(sync_env->cct, conf, bucket_info, key, mtime, size, attrs, versioned_epoch);
 453
 454         call(new RGWPutRESTResourceCR<es_obj_metadata, int>(sync_env->cct, conf->conn.get(),
 455                                                             sync_env->http_manager,
 456                                                             path, nullptr /* params */,
 457                                                             doc, nullptr /* result */));
 458
 459       }
 460       if (retcode < 0) {
 461         return set_cr_error(retcode);
 462       }
 463       return set_cr_done();
 464     }
 465     return 0;
 466   }
 467 };
 468
 469 class RGWElasticHandleRemoteObjCR : public RGWCallStatRemoteObjCR {
 470   ElasticConfigRef conf;
 471   uint64_t versioned_epoch;
 472 public:
 473   RGWElasticHandleRemoteObjCR(RGWDataSyncEnv *_sync_env,
 474                         RGWBucketInfo& _bucket_info, rgw_obj_key& _key,
 475                         ElasticConfigRef _conf, uint64_t _versioned_epoch) : RGWCallStatRemoteObjCR(_sync_env, _bucket_info, _key),
 476                                                            conf(_conf), versioned_epoch(_versioned_epoch) {
 477   }
 478
 479   ~RGWElasticHandleRemoteObjCR() override {}
 480
 481   RGWStatRemoteObjCBCR *allocate_callback() override {
 482     return new RGWElasticHandleRemoteObjCBCR(sync_env, bucket_info, key, conf, versioned_epoch);
 483   }
 484 };
 485
 486 class RGWElasticRemoveRemoteObjCBCR : public RGWCoroutine {
 487   RGWDataSyncEnv *sync_env;
 488   RGWBucketInfo bucket_info;
 489   rgw_obj_key key;
 490   ceph::real_time mtime;
 491   ElasticConfigRef conf;
 492 public:
 493   RGWElasticRemoveRemoteObjCBCR(RGWDataSyncEnv *_sync_env,
 494                           RGWBucketInfo& _bucket_info, rgw_obj_key& _key, const ceph::real_time& _mtime,
 495                           ElasticConfigRef _conf) : RGWCoroutine(_sync_env->cct), sync_env(_sync_env),
 496                                                         bucket_info(_bucket_info), key(_key),
 497                                                         mtime(_mtime), conf(_conf) {}
 498   int operate() override {
 499     reenter(this) {
 500       ldout(sync_env->cct, 10) << ": remove remote obj: z=" << sync_env->source_zone
 501                                << " b=" << bucket_info.bucket << " k=" << key << " mtime=" << mtime << dendl;
 502       yield {
 503         string path = conf->get_obj_path(bucket_info, key);
 504
 505         call(new RGWDeleteRESTResourceCR(sync_env->cct, conf->conn.get(),
 506                                          sync_env->http_manager,
 507                                          path, nullptr /* params */));
 508       }
 509       if (retcode < 0) {
 510         return set_cr_error(retcode);
 511       }
 512       return set_cr_done();
 513     }
 514     return 0;
 515   }
 516
 517 };
 518
 519 class RGWElasticDataSyncModule : public RGWDataSyncModule {
 520   ElasticConfigRef conf;
 521 public:
 522   RGWElasticDataSyncModule(CephContext *cct, const map<string, string, ltstr_nocase>& config) : conf(std::make_shared<ElasticConfig>()) {
 523     conf->init(cct, config);
 524   }
 525   ~RGWElasticDataSyncModule() override {}
 526
 527   void init(RGWDataSyncEnv *sync_env, uint64_t instance_id) override {
 528     conf->init_instance(sync_env->store->get_realm(), instance_id);
 529   }
 530
 531   RGWCoroutine *init_sync(RGWDataSyncEnv *sync_env) override {
 532     ldout(sync_env->cct, 5) << conf->id << ": init" << dendl;
 533     return new RGWElasticInitConfigCBCR(sync_env, conf);
 534   }
 535   RGWCoroutine *sync_object(RGWDataSyncEnv *sync_env, RGWBucketInfo& bucket_info, rgw_obj_key& key, uint64_t versioned_epoch, rgw_zone_set *zones_trace) override {
 536     ldout(sync_env->cct, 10) << conf->id << ": sync_object: b=" << bucket_info.bucket << " k=" << key << " versioned_epoch=" << versioned_epoch << dendl;
 537     if (!conf->should_handle_operation(bucket_info)) {
 538       ldout(sync_env->cct, 10) << conf->id << ": skipping operation (bucket not approved)" << dendl;
 539       return nullptr;
 540     }
 541     return new RGWElasticHandleRemoteObjCR(sync_env, bucket_info, key, conf, versioned_epoch);
 542   }
 543   RGWCoroutine *remove_object(RGWDataSyncEnv *sync_env, RGWBucketInfo& bucket_info, rgw_obj_key& key, real_time& mtime, bool versioned, uint64_t versioned_epoch, rgw_zone_set *zones_trace) override {
 544     /* versioned and versioned epoch params are useless in the elasticsearch backend case */
 545     ldout(sync_env->cct, 10) << conf->id << ": rm_object: b=" << bucket_info.bucket << " k=" << key << " mtime=" << mtime << " versioned=" << versioned << " versioned_epoch=" << versioned_epoch << dendl;
 546     if (!conf->should_handle_operation(bucket_info)) {
 547       ldout(sync_env->cct, 10) << conf->id << ": skipping operation (bucket not approved)" << dendl;
 548       return nullptr;
 549     }
 550     return new RGWElasticRemoveRemoteObjCBCR(sync_env, bucket_info, key, mtime, conf);
 551   }
 552   RGWCoroutine *create_delete_marker(RGWDataSyncEnv *sync_env, RGWBucketInfo& bucket_info, rgw_obj_key& key, real_time& mtime,
 553                                      rgw_bucket_entry_owner& owner, bool versioned, uint64_t versioned_epoch, rgw_zone_set *zones_trace) override {
 554     ldout(sync_env->cct, 10) << conf->id << ": create_delete_marker: b=" << bucket_info.bucket << " k=" << key << " mtime=" << mtime
 555                             << " versioned=" << versioned << " versioned_epoch=" << versioned_epoch << dendl;
 556     ldout(sync_env->cct, 10) << conf->id << ": skipping operation (not handled)" << dendl;
 557     return NULL;
 558   }
 559   RGWRESTConn *get_rest_conn() {
 560     return conf->conn.get();
 561   }
 562
 563   string get_index_path() {
 564     return conf->get_index_path();
 565   }
 566 };
 567
 568 RGWElasticSyncModuleInstance::RGWElasticSyncModuleInstance(CephContext *cct, const map<string, string, ltstr_nocase>& config)
 569 {
 570   data_handler = std::unique_ptr<RGWElasticDataSyncModule>(new RGWElasticDataSyncModule(cct, config));
 571 }
 572
 573 RGWDataSyncModule *RGWElasticSyncModuleInstance::get_data_handler()
 574 {
 575   return data_handler.get();
 576 }
 577
 578 RGWRESTConn *RGWElasticSyncModuleInstance::get_rest_conn()
 579 {
 580   return data_handler->get_rest_conn();
 581 }
 582
 583 string RGWElasticSyncModuleInstance::get_index_path() {
 584   return data_handler->get_index_path();
 585 }
 586
 587 RGWRESTMgr *RGWElasticSyncModuleInstance::get_rest_filter(int dialect, RGWRESTMgr *orig) {
 588   if (dialect != RGW_REST_S3) {
 589     return orig;
 590   }
 591   delete orig;
 592   return new RGWRESTMgr_MDSearch_S3();
 593 }
 594
 595 int RGWElasticSyncModule::create_instance(CephContext *cct, map<string, string, ltstr_nocase>& config, RGWSyncModuleInstanceRef *instance) {
 596   string endpoint;
 597   auto i = config.find("endpoint");
 598   if (i != config.end()) {
 599     endpoint = i->second;
 600   }
 601   instance->reset(new RGWElasticSyncModuleInstance(cct, config));
 602   return 0;
 603 }
 604