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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,191 @@ | ||
| /* | ||
| * LSST Data Management System | ||
| * | ||
| * This product includes software developed by the | ||
| * LSST Project (http://www.lsst.org/). | ||
| * | ||
| * This program is free software: you can redistribute it and/or modify | ||
| * it under the terms of the GNU General Public License as published by | ||
| * the Free Software Foundation, either version 3 of the License, or | ||
| * (at your option) any later version. | ||
| * | ||
| * This program is distributed in the hope that it will be useful, | ||
| * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| * GNU General Public License for more details. | ||
| * | ||
| * You should have received a copy of the LSST License Statement and | ||
| * the GNU General Public License along with this program. If not, | ||
| * see <http://www.lsstcorp.org/LegalNotices/>. | ||
| */ | ||
|
|
||
| // Class header | ||
| #include "czar/CzarRegistry.h" | ||
|
|
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| // System headers | ||
| #include <stdexcept> | ||
|
|
||
| // Third party headers | ||
| #include "nlohmann/json.hpp" | ||
|
|
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| // Qserv headers | ||
| #include "cconfig/CzarConfig.h" | ||
| #include "czar/CzarChunkMap.h" | ||
| #include "czar/Czar.h" | ||
| #include "http/Client.h" | ||
| #include "http/Method.h" | ||
| #include "util/common.h" | ||
|
|
||
| // LSST headers | ||
| #include "lsst/log/Log.h" | ||
|
|
||
| using namespace std; | ||
| using namespace nlohmann; | ||
|
|
||
| namespace { | ||
| LOG_LOGGER _log = LOG_GET("lsst.qserv.czar.CzarRegistry"); | ||
| } // namespace | ||
|
|
||
| namespace lsst::qserv::czar { | ||
|
|
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| CzarRegistry::CzarRegistry(std::shared_ptr<cconfig::CzarConfig> const& czarConfig) : _czarConfig(czarConfig) { | ||
| // Begin periodically updating worker's status in the Replication System's registry | ||
| // in the detached thread. This will continue before the application gets terminated. | ||
| thread registryUpdateThread(&CzarRegistry::_registryUpdateLoop, this); | ||
| _czarHeartbeatThrd = move(registryUpdateThread); | ||
|
|
||
| thread registryWorkerUpdateThread(&CzarRegistry::_registryWorkerInfoLoop, this); | ||
| _czarWorkerInfoThrd = move(registryWorkerUpdateThread); | ||
| } | ||
|
|
||
| CzarRegistry::~CzarRegistry() { | ||
| _loop = false; | ||
| if (_czarHeartbeatThrd.joinable()) { | ||
| _czarHeartbeatThrd.join(); | ||
| } | ||
| if (_czarWorkerInfoThrd.joinable()) { | ||
| _czarWorkerInfoThrd.join(); | ||
| } | ||
| } | ||
|
|
||
| void CzarRegistry::_registryUpdateLoop() { | ||
| auto const method = http::Method::POST; | ||
| string const url = "http://" + _czarConfig->replicationRegistryHost() + ":" + | ||
| to_string(_czarConfig->replicationRegistryPort()) + "/czar"; | ||
| vector<string> const headers = {"Content-Type: application/json"}; | ||
| json const request = json::object({{"instance_id", _czarConfig->replicationInstanceId()}, | ||
| {"auth_key", _czarConfig->replicationAuthKey()}, | ||
| {"czar", | ||
| {{"name", _czarConfig->name()}, | ||
| {"id", _czarConfig->id()}, | ||
| {"management-port", _czarConfig->replicationHttpPort()}, | ||
| {"management-host-name", util::get_current_host_fqdn()}}}}); | ||
| string const requestContext = "Czar: '" + http::method2string(method) + "' request to '" + url + "'"; | ||
| LOGS(_log, LOG_LVL_TRACE, | ||
| __func__ << " czarPost url=" << url << " request=" << request.dump() << " headers=" << headers[0]); | ||
| http::Client client(method, url, request.dump(), headers); | ||
| while (_loop) { | ||
| LOGS(_log, LOG_LVL_TRACE, | ||
| __func__ << " loop url=" << url << " request=" << request.dump() << " headers=" << headers[0]); | ||
| try { | ||
| json const response = client.readAsJson(); | ||
| if (0 == response.at("success").get<int>()) { | ||
| string const error = response.at("error").get<string>(); | ||
| LOGS(_log, LOG_LVL_ERROR, requestContext + " was denied, error: '" + error + "'."); | ||
| // TODO: Is there a better thing to do than just log this here? | ||
| } | ||
| } catch (exception const& ex) { | ||
| LOGS(_log, LOG_LVL_WARN, requestContext + " failed, ex: " + ex.what()); | ||
| } | ||
| this_thread::sleep_for(chrono::seconds(max(1U, _czarConfig->replicationRegistryHearbeatIvalSec()))); | ||
| } | ||
| } | ||
|
|
||
| void CzarRegistry::_registryWorkerInfoLoop() { | ||
| // Get worker information from the registry | ||
| vector<string> const headers; | ||
| auto const method = http::Method::GET; | ||
| string const url = "http://" + _czarConfig->replicationRegistryHost() + ":" + | ||
| to_string(_czarConfig->replicationRegistryPort()) + | ||
| "/services?instance_id=" + _czarConfig->replicationInstanceId(); | ||
| string const requestContext = "Czar: '" + http::method2string(method) + "' request to '" + url + "'"; | ||
| LOGS(_log, LOG_LVL_TRACE, __func__ << " url=" << url); | ||
| http::Client client(method, url, string(), headers); | ||
| while (_loop) { | ||
| try { | ||
| json const response = client.readAsJson(); | ||
| if (0 == response.at("success").get<int>()) { | ||
| string const error = response.at("error").get<string>(); | ||
| LOGS(_log, LOG_LVL_ERROR, requestContext + " was denied, error: '" + error + "'."); | ||
| // TODO: Is there a better thing to do than just log this here? | ||
| } else { | ||
| WorkerContactMapPtr wMap = _buildMapFromJson(response); | ||
| // Compare the new map to the existing map and replace if different. | ||
| { | ||
| lock_guard<mutex> lck(_mapMtx); | ||
| if (wMap != nullptr && !_compareMap(*wMap)) { | ||
| _contactMap = wMap; | ||
| _latestUpdate = CLOCK::now(); | ||
| } | ||
| } | ||
| } | ||
| LOGS(_log, LOG_LVL_TRACE, __func__ << " resp=" << response); | ||
| } catch (exception const& ex) { | ||
| LOGS(_log, LOG_LVL_WARN, requestContext + " failed, ex: " + ex.what()); | ||
| } | ||
| this_thread::sleep_for(chrono::seconds(15)); | ||
| } | ||
| } | ||
|
|
||
| CzarRegistry::WorkerContactMapPtr CzarRegistry::_buildMapFromJson(nlohmann::json const& response) { | ||
| auto const& jsServices = response.at("services"); | ||
| auto const& jsWorkers = jsServices.at("workers"); | ||
| auto wMap = WorkerContactMapPtr(new WorkerContactMap()); | ||
| for (auto const& [key, value] : jsWorkers.items()) { | ||
| auto const& jsQserv = value.at("qserv"); | ||
| LOGS(_log, LOG_LVL_DEBUG, __func__ << " key=" << key << " jsQ=" << jsQserv); | ||
| string wHost = jsQserv.at("host-addr").get<string>(); | ||
| string wManagementHost = jsQserv.at("management-host-name").get<string>(); | ||
| int wPort = jsQserv.at("management-port").get<int>(); | ||
| uint64_t updateTimeInt = jsQserv.at("update-time-ms").get<uint64_t>(); | ||
| TIMEPOINT updateTime = TIMEPOINT(chrono::milliseconds(updateTimeInt)); | ||
| WorkerContactInfo wInfo(key, wHost, wManagementHost, wPort, updateTime); | ||
| LOGS(_log, LOG_LVL_DEBUG, | ||
| __func__ << " wHost=" << wHost << " wPort=" << wPort << " updateTime=" << updateTimeInt); | ||
| auto iter = wMap->find(key); | ||
| if (iter != wMap->end()) { | ||
| LOGS(_log, LOG_LVL_ERROR, __func__ << " duplicate key " << key << " in " << response); | ||
| if (!wInfo.sameContactInfo(iter->second)) { | ||
| LOGS(_log, LOG_LVL_ERROR, __func__ << " incongruent key " << key << " in " << response); | ||
| return nullptr; | ||
| } | ||
| // ignore the duplicate, since it matches the previous one. | ||
| } else { | ||
| wMap->insert({key, wInfo}); | ||
| } | ||
| } | ||
| return wMap; | ||
| } | ||
|
|
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| bool CzarRegistry::_compareMap(WorkerContactMap const& other) const { | ||
| if (_contactMap == nullptr) { | ||
| // If _contactMap is null, it needs to be replaced. | ||
| return false; | ||
| } | ||
| if (other.size() != _contactMap->size()) { | ||
| return false; | ||
| } | ||
| for (auto const& [key, wInfo] : *_contactMap) { | ||
| auto iter = other.find(key); | ||
| if (iter == other.end()) { | ||
| return false; | ||
| } else { | ||
| if (!(iter->second.sameContactInfo(wInfo))) { | ||
| return false; | ||
| } | ||
| } | ||
| } | ||
| return true; | ||
| } | ||
|
|
||
| } // namespace lsst::qserv::czar |
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