fb1875c61c
Pre-loading users for all threads at startup significantly reduces the chance for failures caused by the lazy initialization of the user database done by the authenticators. If users are not loaded at startup and the connection limit for all servers is reached, authentication in MaxScale will fail not due to too many connections but due to the lack of authentication data. This causes repeated reloading of users, which floods the log with messages, and unnecessary stress on the cluster itself.
153 lines
4.0 KiB
C
153 lines
4.0 KiB
C
#pragma once
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/*
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* Copyright (c) 2016 MariaDB Corporation Ab
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*
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* Use of this software is governed by the Business Source License included
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* in the LICENSE.TXT file and at www.mariadb.com/bsl11.
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*
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* Change Date: 2020-01-01
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*
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* On the date above, in accordance with the Business Source License, use
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* of this software will be governed by version 2 or later of the General
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* Public License.
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*/
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#include <maxscale/service.h>
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MXS_BEGIN_DECLS
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/**
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* @file service.h - MaxScale internal service functions
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*/
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/**
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* Service life cycle management
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*
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* These functions should only be called by the MaxScale core.
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*/
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/**
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* @brief Allocate a new service
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*
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* @param name The service name
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* @param router The router module this service uses
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*
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* @return The newly created service or NULL if an error occurred
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*/
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SERVICE* service_alloc(const char *name, const char *router);
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/**
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* @brief Free the specified service
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*
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* @param service The service to free
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*/
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void service_free(SERVICE *service);
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/**
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* @brief Shut all services down
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*
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* Turns on the shutdown flag in each service. This should be done as
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* part of the MaxScale shutdown.
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*/
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void service_shutdown(void);
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/**
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* @brief Destroy all service router and filter instances
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*
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* Calls the @c destroyInstance entry point of each service' router and
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* filters. This should be done after all worker threads have exited.
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*/
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void service_destroy_instances(void);
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/**
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* @brief Launch all services
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*
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* Initialize and start all services. This should only be called once by the
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* main initialization code.
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*
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* @return Number of successfully started services
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*/
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int service_launch_all(void);
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/**
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* Perform thread-specific initialization
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*
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* Currently this function only pre-loads users for all threads.
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*
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* @return True on success, false on error (currently always returns true).
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*/
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bool service_thread_init();
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/**
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* Creating and adding new components to services
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*/
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SERV_LISTENER* serviceCreateListener(SERVICE *service, const char *name,
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const char *protocol, const char *address,
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unsigned short port, const char *authenticator,
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const char *options, SSL_LISTENER *ssl);
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void serviceRemoveBackend(SERVICE *service, const SERVER *server);
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/**
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* @brief Serialize a service to a file
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*
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* This converts @c service into an INI format file.
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*
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* NOTE: This does not persist the complete service configuration and requires
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* that an existing service configuration is in the main configuration file.
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*
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* @param service Service to serialize
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* @return False if the serialization of the service fails, true if it was successful
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*/
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bool service_serialize(const SERVICE *service);
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/**
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* Internal utility functions
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*/
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char* service_get_name(SERVICE* service);
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bool service_all_services_have_listeners(void);
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int service_isvalid(SERVICE *service);
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/**
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* Check if a service uses @c servers
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* @param server Server that is queried
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* @return True if server is used by at least one service
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*/
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bool service_server_in_use(const SERVER *server);
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/** Update the server weights used by services */
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void service_update_weights();
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/**
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* Alteration of the service configuration
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*/
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void serviceAddRouterOption(SERVICE *service, char *option);
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void serviceClearRouterOptions(SERVICE *service);
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void service_update(SERVICE *service, char *router, char *user, char *auth);
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/**
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* @brief Add parameters to a service
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*
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* A copy of @c param is added to @c service.
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*
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* @param service Service where the parameters are added
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* @param param Parameters to add
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*/
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void service_add_parameters(SERVICE *service, const MXS_CONFIG_PARAMETER *param);
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/**
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* @brief Set listener rebinding interval
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*
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* @param service Service to configure
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* @param value String value o
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*/
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void service_set_retry_interval(SERVICE *service, int value);
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/**
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* Internal debugging diagnostics
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*/
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void printService(SERVICE *service);
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void printAllServices(void);
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MXS_END_DECLS
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