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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
/**
* @class storage::StorageNode
* @ingroup storageserver
*
* @brief Main storage server class.
*
* This class sets up the entire storage server.
*
* @author Håkon Humberset
*/
#pragma once
#include <vespa/config-stor-distribution.h>
#include <vespa/config-upgrading.h>
#include <vespa/config/helper/ifetchercallback.h>
#include <vespa/config/subscription/configuri.h>
#include <vespa/document/config/config-documenttypes.h>
#include <vespa/storage/common/doneinitializehandler.h>
#include <vespa/config-bucketspaces.h>
#include <vespa/storage/config/config-stor-server.h>
#include <vespa/storage/storageutil/resumeguard.h>
#include <vespa/storageframework/defaultimplementation/component/componentregisterimpl.h>
#include <vespa/storageframework/generic/metric/metricupdatehook.h>
#include <atomic>
#include <mutex>
namespace document { class DocumentTypeRepo; }
namespace config { class ConfigFetcher; }
namespace storage {
class ApplicationGenerationFetcher;
class CommunicationManager;
class FileStorManager;
class HostInfo;
class IStorageChainBuilder;
class NodeIdentity;
class StateManager;
class StateReporter;
class StatusMetricConsumer;
class StatusWebServer;
class StorageComponent;
class StorageLink;
class NodeStateReporter;
struct DeadLockDetector;
struct StorageMetricSet;
struct StorageNodeContext;
namespace lib { class NodeType; }
class StorageNode : private config::IFetcherCallback<vespa::config::content::core::StorServerConfig>,
private config::IFetcherCallback<vespa::config::content::StorDistributionConfig>,
private config::IFetcherCallback<vespa::config::content::UpgradingConfig>,
private config::IFetcherCallback<vespa::config::content::core::BucketspacesConfig>,
private framework::MetricUpdateHook,
private DoneInitializeHandler,
private framework::defaultimplementation::ShutdownListener
{
public:
enum RunMode { NORMAL, SINGLE_THREADED_TEST_MODE };
StorageNode(const StorageNode &) = delete;
StorageNode & operator = (const StorageNode &) = delete;
/**
* @param excludeStorageChain With this option set, no chain will be set
* up. This can be useful in unit testing if you need a storage server
* instance, but you want to have full control over the components yourself.
*/
StorageNode(const config::ConfigUri & configUri,
StorageNodeContext& context,
ApplicationGenerationFetcher& generationFetcher,
std::unique_ptr<HostInfo> hostInfo,
RunMode = NORMAL);
~StorageNode() override;
virtual const lib::NodeType& getNodeType() const = 0;
bool attemptedStopped() const;
void notifyDoneInitializing() override;
void waitUntilInitialized(vespalib::duration timeout = 15s);
void updateMetrics(const MetricLockGuard & guard) override;
/** Updates the document type repo. */
void setNewDocumentRepo(const std::shared_ptr<const document::DocumentTypeRepo>& repo);
/**
* Pauses the persistence processing. While the returned ResumeGuard
* is alive, no calls will be made towards the persistence provider.
*/
virtual ResumeGuard pause() = 0;
void requestShutdown(vespalib::stringref reason) override;
DoneInitializeHandler& getDoneInitializeHandler() { return *this; }
// For testing
StorageLink* getChain() { return _chain.get(); }
virtual void initializeStatusWebServer();
protected:
using StorServerConfig = vespa::config::content::core::StorServerConfig;
using UpgradingConfig = vespa::config::content::UpgradingConfig;
using StorDistributionConfig = vespa::config::content::StorDistributionConfig;
using BucketspacesConfig = vespa::config::content::core::BucketspacesConfig;
private:
bool _singleThreadedDebugMode;
// Subscriptions to config
std::unique_ptr<config::ConfigFetcher> _configFetcher;
std::unique_ptr<HostInfo> _hostInfo;
StorageNodeContext& _context;
ApplicationGenerationFetcher& _generationFetcher;
vespalib::string _rootFolder;
std::atomic<bool> _attemptedStopped;
vespalib::string _pidFile;
// First components that doesn't depend on others
std::unique_ptr<StatusWebServer> _statusWebServer;
std::shared_ptr<StorageMetricSet> _metrics;
std::unique_ptr<metrics::MetricManager> _metricManager;
// Depends on bucket databases and stop() functionality
std::unique_ptr<DeadLockDetector> _deadLockDetector;
// Depends on metric manager
std::unique_ptr<StatusMetricConsumer> _statusMetrics;
// Depends on metric manager
std::unique_ptr<StateReporter> _stateReporter;
std::unique_ptr<StateManager> _stateManager;
// The storage chain can depend on anything.
std::unique_ptr<StorageLink> _chain;
/** Implementation of config callbacks. */
void configure(std::unique_ptr<StorServerConfig> config) override;
void configure(std::unique_ptr<UpgradingConfig> config) override;
void configure(std::unique_ptr<StorDistributionConfig> config) override;
virtual void configure(std::unique_ptr<document::config::DocumenttypesConfig> config,
bool hasChanged, int64_t generation);
void configure(std::unique_ptr<BucketspacesConfig>) override;
protected:
// Lock taken while doing configuration of the server.
std::mutex _configLock;
std::mutex _initial_config_mutex;
using InitialGuard = std::lock_guard<std::mutex>;
// Current running config. Kept, such that we can see what has been
// changed in live config updates.
std::unique_ptr<StorServerConfig> _serverConfig;
std::unique_ptr<UpgradingConfig> _clusterConfig;
std::unique_ptr<StorDistributionConfig> _distributionConfig;
std::unique_ptr<document::config::DocumenttypesConfig> _doctypesConfig;
std::unique_ptr<BucketspacesConfig> _bucketSpacesConfig;
// New configs gotten that has yet to have been handled
std::unique_ptr<StorServerConfig> _newServerConfig;
std::unique_ptr<UpgradingConfig> _newClusterConfig;
std::unique_ptr<StorDistributionConfig> _newDistributionConfig;
std::unique_ptr<document::config::DocumenttypesConfig> _newDoctypesConfig;
std::unique_ptr<BucketspacesConfig> _newBucketSpacesConfig;
std::unique_ptr<StorageComponent> _component;
std::unique_ptr<NodeIdentity> _node_identity;
config::ConfigUri _configUri;
CommunicationManager* _communicationManager;
private:
std::unique_ptr<IStorageChainBuilder> _chain_builder;
protected:
/**
* Node subclasses currently need to explicitly acquire ownership of state
* manager so that they can add it to the end of their processing chains,
* which this method allows for.
* Any component releasing the state manager must ensure it lives for as
* long as the node instance itself lives.
*/
std::unique_ptr<StateManager> releaseStateManager();
void initialize(const NodeStateReporter & reporter);
virtual void subscribeToConfigs();
virtual void initializeNodeSpecific() = 0;
virtual void perform_post_chain_creation_init_steps() = 0;
virtual void createChain(IStorageChainBuilder &builder) = 0;
virtual void handleLiveConfigUpdate(const InitialGuard & initGuard);
void shutdown();
virtual void removeConfigSubscriptions();
public:
void set_storage_chain_builder(std::unique_ptr<IStorageChainBuilder> builder);
};
} // storage
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