fgerlits commented on a change in pull request #1257: URL: https://github.com/apache/nifi-minifi-cpp/pull/1257#discussion_r804511765
########## File path: extensions/kubernetes/controllerservice/KubernetesControllerService.cpp ########## @@ -0,0 +1,212 @@ +/** + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF licenses this file to You under the Apache License, Version 2.0 + * (the "License"); you may not use this file except in compliance with + * the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#include "KubernetesControllerService.h" + +#include <vector> + +extern "C" { +#include "config/incluster_config.h" +#include "config/kube_config.h" +#include "include/apiClient.h" +#include "api/CoreV1API.h" +} + +#include "core/Resource.h" +#include "core/logging/LoggerConfiguration.h" +#include "Exception.h" +#include "utils/gsl.h" + +namespace org::apache::nifi::minifi::controllers { + +class KubernetesControllerService::APIClient { + public: + explicit APIClient(core::logging::Logger& logger); + ~APIClient(); + + APIClient(APIClient&&) = delete; + APIClient(const APIClient&) = delete; + APIClient& operator=(APIClient&&) = delete; + APIClient& operator=(const APIClient&) = delete; + + apiClient_t* getClient() { return api_client_; } + + private: + char* base_path_ = nullptr; + sslConfig_t* ssl_config_ = nullptr; + list_t* api_keys_ = nullptr; + apiClient_t* api_client_ = nullptr; +}; + +KubernetesControllerService::APIClient::APIClient(core::logging::Logger& logger) { + int rc = load_incluster_config(&base_path_, &ssl_config_, &api_keys_); + if (rc != 0) { + logger.log_error("Cannot load kubernetes configuration in cluster"); + return; + } + api_client_ = apiClient_create_with_base_path(base_path_, ssl_config_, api_keys_); + if (!api_client_) { + logger.log_error("Cannot create a kubernetes client"); + } +} + +KubernetesControllerService::APIClient::~APIClient() { + if (api_client_) { + apiClient_free(api_client_); + api_client_ = nullptr; + } + + free_client_config(base_path_, ssl_config_, api_keys_); + base_path_ = nullptr; + ssl_config_ = nullptr; + api_keys_ = nullptr; + + apiClient_unsetupGlobalEnv(); +} + +const core::Property KubernetesControllerService::NamespaceFilter{ + core::PropertyBuilder::createProperty("Namespace Filter") + ->withDescription("Limit the output to pods in namespaces which match this regular expression") + ->withDefaultValue<std::string>("default") + ->build()}; +const core::Property KubernetesControllerService::PodNameFilter{ + core::PropertyBuilder::createProperty("Pod Name Filter") + ->withDescription("If present, limit the output to pods the name of which matches this regular expression") + ->build()}; +const core::Property KubernetesControllerService::ContainerNameFilter{ + core::PropertyBuilder::createProperty("Container Name Filter") + ->withDescription("If present, limit the output to containers the name of which matches this regular expression") + ->build()}; + +KubernetesControllerService::KubernetesControllerService(const std::string& name, const utils::Identifier& uuid) + : AttributeProviderService(name, uuid), + logger_{core::logging::LoggerFactory<KubernetesControllerService>::getLogger()}, + api_client_{std::make_unique<APIClient>(*logger_)} { +} + +KubernetesControllerService::KubernetesControllerService(const std::string& name, const std::shared_ptr<Configure>& configuration) + : KubernetesControllerService{name} { + setConfiguration(configuration); + initialize(); +} + +void KubernetesControllerService::initialize() { + std::lock_guard<std::mutex> lock(initialization_mutex_); + if (initialized_) { return; } + + ControllerService::initialize(); + setSupportedProperties({NamespaceFilter, PodNameFilter, ContainerNameFilter}); + initialized_ = true; +} + +void KubernetesControllerService::onEnable() { + std::string namespace_filter; + if (getProperty(NamespaceFilter.getName(), namespace_filter) && !namespace_filter.empty()) { + namespace_filter_ = std::regex{namespace_filter}; + } + + std::string pod_name_filter; + if (getProperty(PodNameFilter.getName(), pod_name_filter) && !pod_name_filter.empty()) { + pod_name_filter_ = std::regex{pod_name_filter}; + } + + std::string container_name_filter; + if (getProperty(ContainerNameFilter.getName(), container_name_filter) && !container_name_filter.empty()) { + container_name_filter_ = std::regex{container_name_filter}; + } +} + +namespace { + +struct v1_pod_list_t_deleter { + void operator()(v1_pod_list_t* ptr) const noexcept { v1_pod_list_free(ptr); } +}; +using v1_pod_list_unique_ptr = std::unique_ptr<v1_pod_list_t, v1_pod_list_t_deleter>; + +v1_pod_list_unique_ptr getPods(gsl::not_null<apiClient_t*> api_client, core::logging::Logger& logger) { + logger.log_info("Calling Kubernetes API listPodForAllNamespaces..."); + v1_pod_list_unique_ptr pod_list{CoreV1API_listPodForAllNamespaces(api_client, + 0, // allowWatchBookmarks + nullptr, // continue Review comment: I think it looks better this way, and since the style guide prefers this, too, I would prefer to leave it as it is. -- This is an automated message from the Apache Git Service. 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